89 lines
3.7 KiB
Text
89 lines
3.7 KiB
Text
/*
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Yara Rule Set
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Author: Florian Roth
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Date: 2017-04-07
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Identifier: Quasar RAT
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*/
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/* Rule Set ----------------------------------------------------------------- */
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rule Quasar_RAT_1 {
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meta:
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description = "Detects Quasar RAT"
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license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"
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author = "Florian Roth (Nextron Systems)"
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reference = "https://www.pwc.co.uk/cyber-security/pdf/cloud-hopper-annex-b-final.pdf"
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date = "2017-04-07"
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hash1 = "0774d25e33ca2b1e2ee2fafe3fdbebecefbf1d4dd99e6460f0bc8713dd0fd740"
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hash2 = "1ce40a89ef9d56fd32c00db729beecc17d54f4f7c27ff22f708a957cd3f9a4ec"
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hash3 = "515c1a68995557035af11d818192f7866ef6a2018aa13112fefbe08395732e89"
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hash4 = "f08db220df716de3d4f63f3007a03f902601b9b32099d6a882da87312f263f34"
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id = "36220de3-aa1a-5c34-adae-432d939c811e"
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strings:
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$s1 = "DoUploadAndExecute" fullword ascii
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$s2 = "DoDownloadAndExecute" fullword ascii
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$s3 = "DoShellExecute" fullword ascii
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$s4 = "set_Processname" fullword ascii
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$op1 = { 04 1e fe 02 04 16 fe 01 60 }
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$op2 = { 00 17 03 1f 20 17 19 15 28 }
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$op3 = { 00 04 03 69 91 1b 40 }
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condition:
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( uint16(0) == 0x5a4d and filesize < 5000KB and all of ($s*) or all of ($op*) )
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}
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rule Quasar_RAT_2 {
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meta:
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description = "Detects Quasar RAT"
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license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"
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author = "Florian Roth (Nextron Systems)"
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reference = "https://www.pwc.co.uk/cyber-security/pdf/cloud-hopper-annex-b-final.pdf"
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date = "2017-04-07"
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super_rule = 1
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hash1 = "0774d25e33ca2b1e2ee2fafe3fdbebecefbf1d4dd99e6460f0bc8713dd0fd740"
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hash2 = "515c1a68995557035af11d818192f7866ef6a2018aa13112fefbe08395732e89"
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hash3 = "f08db220df716de3d4f63f3007a03f902601b9b32099d6a882da87312f263f34"
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id = "0ca795c5-3631-5a99-8675-37558485f478"
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strings:
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$x1 = "GetKeyloggerLogsResponse" fullword ascii
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$x2 = "get_Keylogger" fullword ascii
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$x3 = "HandleGetKeyloggerLogsResponse" fullword ascii
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$s1 = "DoShellExecuteResponse" fullword ascii
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$s2 = "GetPasswordsResponse" fullword ascii
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$s3 = "GetStartupItemsResponse" fullword ascii
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$s4 = "<GetGenReader>b__7" fullword ascii
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$s5 = "RunHidden" fullword ascii
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condition:
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( uint16(0) == 0x5a4d and filesize < 5000KB and $x1 ) or ( all of them )
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}
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rule MAL_QuasarRAT_May19_1 {
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meta:
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description = "Detects QuasarRAT malware"
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author = "Florian Roth (Nextron Systems)"
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reference = "https://blog.ensilo.com/uncovering-new-activity-by-apt10"
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date = "2019-05-27"
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modified = "2023-01-06"
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hash1 = "0644e561225ab696a97ba9a77583dcaab4c26ef0379078c65f9ade684406eded"
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id = "a4e82b6a-31f8-59fc-acfa-805c4594680a"
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strings:
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$x1 = "Quasar.Common.Messages" ascii fullword
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$x2 = "Client.MimikatzTools" ascii fullword
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$x3 = "Resources.powerkatz_x86.dll" ascii fullword
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$x4 = "Uninstalling... good bye :-(" wide
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$xc1 = { 41 00 64 00 6D 00 69 00 6E 00 00 11 73 00 63 00
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68 00 74 00 61 00 73 00 6B 00 73 00 00 1B 2F 00
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63 00 72 00 65 00 61 00 74 00 65 00 20 00 2F 00
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74 00 6E 00 20 00 22 00 00 27 22 00 20 00 2F 00
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73 }
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$xc2 = { 00 70 00 69 00 6E 00 67 00 20 00 2D 00 6E 00 20
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00 31 00 30 00 20 00 6C 00 6F 00 63 00 61 00 6C
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00 68 00 6F 00 73 00 74 00 20 00 3E 00 20 00 6E
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00 75 00 6C 00 0D 00 0A 00 64 00 65 00 6C 00 20
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00 2F 00 61 00 20 00 2F 00 71 00 20 00 2F 00 66
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00 20 00 }
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condition:
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uint16(0) == 0x5a4d and filesize < 10000KB and 1 of them
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}
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