218 lines
No EOL
12 KiB
Text
218 lines
No EOL
12 KiB
Text
import "pe"
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rule HvS_APT37_smb_scanner {
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meta:
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description = "Unknown smb login scanner used by APT37"
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license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"
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author = "Marc Stroebel"
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date = "2020-12-15"
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reference1 = "https://www.hvs-consulting.de/media/downloads/ThreatReport-Lazarus.pdf"
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reference2 = "https://www.hybrid-analysis.com/sample/d16163526242508d6961f061aaffe3ae5321bd64d8ceb6b2788f1570757595fc?environmentId=2"
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id = "89a5cc32-f151-583d-823d-692de2c2b084"
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strings:
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$s1 = "Scan.exe StartIP EndIP ThreadCount logfilePath [Username Password Deep]" fullword ascii
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$s2 = "%s - %s:(Username - %s / Password - %s" fullword ascii
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$s3 = "Load mpr.dll Error " fullword ascii
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$s4 = "Load Netapi32.dll Error " fullword ascii
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$s5 = "%s U/P not Correct! - %d" fullword ascii
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$s6 = "GetNetWorkInfo Version 1.0" fullword wide
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$s7 = "Hello World!" fullword wide
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$s8 = "%s Error: %ld" fullword ascii
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$s9 = "%s U/P Correct!" fullword ascii
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$s10 = "%s --------" fullword ascii
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$s11 = "%s%-30s%I64d" fullword ascii
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$s12 = "%s%-30s(DIR)" fullword ascii
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$s13 = "%04d-%02d-%02d %02d:%02d" fullword ascii
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$s14 = "Share: Local Path: Uses: Descriptor:" fullword ascii
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$s15 = "Share: Type: Remark:" fullword ascii
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condition:
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uint16(0) == 0x5a4d and filesize < 200KB and (10 of them)
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}
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rule HvS_APT37_cred_tool {
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meta:
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description = "Unknown cred tool used by APT37"
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license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"
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author = "Markus Poelloth"
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date = "2020-12-15"
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reference = "https://www.hvs-consulting.de/media/downloads/ThreatReport-Lazarus.pdf"
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id = "e830025a-f2ac-55b1-aca3-ded9dba83a67"
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strings:
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$s1 = " <requestedExecutionLevel level=\"asInvoker\" uiAccess=\"false\"></requestedExecutionLevel>" fullword ascii
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$s2 = "Domain Login" fullword ascii
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$s3 = "IEShims_GetOriginatingThreadContext" fullword ascii
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$s4 = " Type Descriptor'" fullword ascii
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$s5 = "User: %s" fullword ascii
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$s6 = "Pass: %s" fullword ascii
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$s7 = " <trustInfo xmlns=\"urn:schemas-microsoft-com:asm.v3\">" fullword ascii
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$s8 = "E@c:\\u" fullword ascii
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condition:
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filesize < 500KB and 7 of them
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}
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rule HvS_APT37_RAT_loader {
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meta:
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description = "BLINDINGCAN RAT loader named iconcash.db used by APT37"
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license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"
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author = "Marc Stroebel"
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date = "2020-12-15"
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hash = "b70e66d387e42f5f04b69b9eb15306036702ab8a50b16f5403289b5388292db9"
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reference1 = "https://www.hvs-consulting.de/media/downloads/ThreatReport-Lazarus.pdf"
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reference2 = "https://us-cert.cisa.gov/ncas/analysis-reports/ar20-232a"
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id = "6c3e8465-d607-59bf-85fc-5abbef71fb1c"
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condition:
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(pe.version_info["OriginalFilename"] contains "MFC_DLL.dll") and
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(pe.exports("SMain") and pe.exports("SMainW") )
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}
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rule HvS_APT37_webshell_img_thumbs_asp {
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meta:
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description = "Webshell named img.asp, thumbs.asp or thumb.asp used by APT37"
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license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"
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author = "Moritz Oettle"
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date = "2020-12-15"
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reference = "https://www.hvs-consulting.de/media/downloads/ThreatReport-Lazarus.pdf"
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hash = "94d2448d3794ae3f29678a7337473d259b5cfd1c7f703fe53ee6c84dd10a48ef"
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id = "e45d4507-81de-5f72-9ce2-4f0e3e5c62b1"
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strings:
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$s1 = "strMsg = \"E : F\"" fullword ascii
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$s2 = "strMsg = \"S : \" & Len(fileData)" fullword ascii
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$s3 = "Left(workDir, InStrRev(workDir, \"/\")) & \"video\""
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$a1 = "Server.CreateObject(\"Scripting.FileSystemObject\")" fullword ascii
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$a2 = "Dim tmpPath, workDir" fullword ascii
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$a3 = "Dim objFSO, objTextStream" fullword ascii
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$a4 = "workDir = Request.ServerVariables(\"URL\")" fullword ascii
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$a5 = "InStrRev(workDir, \"/\")" ascii
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$g1 = "WriteFile = 0" fullword ascii
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$g2 = "fileData = Request.Form(\"fp\")" fullword ascii
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$g3 = "fileName = Request.Form(\"fr\")" fullword ascii
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$g4 = "Err.Clear()" fullword ascii
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$g5 = "Option Explicit" fullword ascii
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condition:
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filesize < 2KB and (( 1 of ($s*) ) or (3 of ($a*)) or (5 of ($g*)))
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}
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rule HvS_APT37_webshell_template_query_asp {
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meta:
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description = "Webshell named template-query.aspimg.asp used by APT37"
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license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"
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author = "Moritz Oettle"
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date = "2020-12-15"
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reference = "https://www.hvs-consulting.de/media/downloads/ThreatReport-Lazarus.pdf"
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hash = "961a66d01c86fa5982e0538215b17fb9fae2991331dfea812b8c031e2ceb0d90"
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id = "dc006b46-4c51-59cd-8b7d-adbfec86cd2e"
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strings:
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$g1 = "server.scripttimeout=600" fullword ascii
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$g2 = "response.buffer=true" fullword ascii
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$g3 = "response.expires=-1" fullword ascii
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$g4 = "session.timeout=600" fullword ascii
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$a1 = "redhat hacker" ascii
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$a2 = "want_pre.asp" ascii
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$a3 = "vgo=\"admin\"" ascii
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$a4 = "ywc=false" ascii
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$s1 = "public br,ygv,gbc,ydo,yka,wzd,sod,vmd" fullword ascii
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condition:
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filesize > 70KB and filesize < 200KB and (( 1 of ($s*) ) or (2 of ($a*)) or (3 of ($g*)))
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}
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/* Possibly prone to FPs
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rule HvS_APT37_mimikatz_loader_DF012 {
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meta:
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description = "Loader for encrypted Mimikatz variant used by APT37"
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license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"
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author = "Marc Stroebel"
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date = "2020-12-15"
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reference = "https://www.hvs-consulting.de/media/downloads/ThreatReport-Lazarus.pdf"
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hash = "42e4a9aeff3744bbbc0e82fd5b93eb9b078460d8f40e0b61b27b699882f521be"
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strings:
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$s1 = ".?AVCEncryption@@" fullword ascii
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$s2 = "afrfa"
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condition:
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uint16(0) == 0x5a4d and filesize < 200KB and
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(pe.imphash() == "fa0b87c7e07d21001355caf7b5027219") and (all of them)
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}
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*/
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rule HvS_APT37_webshell_controllers_asp {
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meta:
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description = "Webshell named controllers.asp or inc-basket-offer.asp used by APT37"
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license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"
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author = "Moritz Oettle"
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date = "2020-12-15"
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reference = "https://www.hvs-consulting.de/media/downloads/ThreatReport-Lazarus.pdf"
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hash = "829462fc6d84aae04a962dfc919d0a392265fbf255eab399980d2b021e385517"
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id = "82370415-30f4-514d-8806-e2daced96f07"
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strings:
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$s0 = "<%@Language=VBScript.Encode" ascii
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// Case permutations of the word SeRvEr encoded with the Microsoft Script Encoder followed by .scriptrimeOut
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$x1 = { 64 7F 44 2D 7F 44 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x2 = { 64 7F 49 2D 41 44 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x3 = { 64 7F 49 2D 41 49 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x4 = { 64 7F 49 23 7F 44 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x5 = { 64 7F 49 23 7F 49 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x6 = { 64 7F 49 23 41 44 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x7 = { 64 7F 49 23 41 49 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x8 = { 64 41 44 2D 7F 44 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x9 = { 64 41 44 2D 7F 49 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x10 = { 64 41 44 2D 41 44 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x11 = { 64 41 44 2D 41 49 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x12 = { 64 7F 44 2D 7F 49 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x13 = { 64 41 44 23 7F 44 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x14 = { 64 41 44 23 7F 49 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x15 = { 64 41 44 23 41 44 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x16 = { 64 41 44 23 41 49 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x17 = { 64 41 49 2D 7F 44 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x18 = { 64 41 49 2D 7F 49 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x19 = { 64 41 49 2D 41 44 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x20 = { 64 41 49 2D 41 49 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x21 = { 64 41 49 23 7F 44 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x22 = { 64 41 49 23 7F 49 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x23 = { 64 7F 44 2D 41 44 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x24 = { 64 41 49 23 41 44 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x25 = { 64 41 49 23 41 49 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x26 = { 6A 7F 44 2D 7F 44 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x27 = { 6A 7F 44 2D 7F 49 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x28 = { 6A 7F 44 2D 41 44 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x29 = { 6A 7F 44 2D 41 49 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x30 = { 6A 7F 44 23 7F 44 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x31 = { 6A 7F 44 23 7F 49 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x32 = { 6A 7F 44 23 41 44 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x33 = { 6A 7F 44 23 41 49 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x34 = { 64 7F 44 2D 41 49 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x35 = { 6A 7F 49 2D 7F 44 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x36 = { 6A 7F 49 2D 7F 49 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x37 = { 6A 7F 49 2D 41 44 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x38 = { 6A 7F 49 2D 41 49 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x39 = { 6A 7F 49 23 7F 44 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x40 = { 6A 7F 49 23 7F 49 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x41 = { 6A 7F 49 23 41 44 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x42 = { 6A 7F 49 23 41 49 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x43 = { 6A 41 44 2D 7F 44 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x44 = { 6A 41 44 2D 7F 49 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x45 = { 64 7F 44 23 7F 44 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x46 = { 6A 41 44 2D 41 44 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x47 = { 6A 41 44 2D 41 49 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x48 = { 6A 41 44 23 7F 44 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x49 = { 6A 41 44 23 7F 49 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x50 = { 6A 41 44 23 41 44 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x51 = { 6A 41 44 23 41 49 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x52 = { 6A 41 49 2D 7F 44 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x53 = { 6A 41 49 2D 7F 49 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x54 = { 6A 41 49 2D 41 44 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x55 = { 6A 41 49 2D 41 49 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x56 = { 64 7F 44 23 7F 49 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x57 = { 6A 41 49 23 7F 44 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x58 = { 6A 41 49 23 7F 49 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x59 = { 6A 41 49 23 41 44 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x60 = { 6A 41 49 23 41 49 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x61 = { 64 7F 44 23 41 44 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x62 = { 64 7F 44 23 41 49 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x63 = { 64 7F 49 2D 7F 44 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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$x64 = { 64 7F 49 2D 7F 49 63 2F 6D 4D 6B 61 4F 59 62 3A 6E 72 21 59 }
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condition:
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filesize > 50KB and filesize < 200KB and ( $s0 and 1 of ($x*) )
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} |