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DITEKSHEN_MALWARE_Win_Bobik

Detects Bobik infostealer

MalwareBobikditekSHen detectionBSD 2-Clause LicenseCompiles with YARA-X
Author
ditekSHen
Date
2020-11-06
Modified
2024-11-01
Score / Quality
75 / 75

What this rule detects

Detects Bobik infostealer

Associated malware family: Bobik.

Targets: Windows PE.

It defines 7 patterns (6 text, 0 hex, 1 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
malware-win-bobik.yarBSD 2-Clause License
rule DITEKSHEN_MALWARE_Win_Bobik : FILE
{
	meta:
		description = "Detects Bobik infostealer"
		author = "ditekSHen"
		id = "12f14151-0c89-519d-85d3-4b4b82a950a3"
		date = "2020-11-06"
		modified = "2024-11-01"
		reference = "https://github.com/ditekshen/detection"
		source_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/yara/malware.yar#L3483-L3498"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "735dcb9e04956863305ca89a43686b8e48e3b20784ae9292cfc40d1c2c09d467"
		score = 75
		quality = 75
		tags = "FILE"
		clamav_sig = "MALWARE.Win.Trojan.Bobik"

	strings:
		$s1 = "@Default\\Login Data" fullword ascii
		$s2 = "@Default\\Cookies" fullword ascii
		$s3 = "@logins.json" fullword ascii
		$s4 = "@[EXECUTE]" fullword ascii
		$s5 = "@C:\\Windows\\System32\\cmd.exe" fullword ascii
		$s6 = /(CHROME|OPERA|FIREFOX)_BASED/ fullword ascii
		$s7 = "threads.nim" fullword ascii

	condition:
		uint16( 0 ) == 0x5a4d and 5 of them
}

Strings (7 patterns)

IdentifierTypeValueModifiers
$s1text"@Default\\Login Data"fullword ascii
$s2text"@Default\\Cookies"fullword ascii
$s3text"@logins.json"fullword ascii
$s4text"@[EXECUTE]"fullword ascii
$s5text"@C:\\Windows\\System32\\cmd.exe"fullword ascii
$s6regex/(CHROME|OPERA|FIREFOX)_BASED/fullword ascii
$s7text"threads.nim"fullword ascii

Condition

uint16( 0 ) == 0x5a4d and 5 of them

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • At least 5 patterns in the rule must match.

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References

Licence & attribution

Author: ditekSHen

Source repository: ditekSHen detection @ e76c93dcde

Licence: BSD 2-Clause License (repository licence)

Copyright notice: Copyright 2021 by ditekSHen (https://github.com/ditekshen/detection).

Original rule

Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.

Rule id: 12f14151-0c89-519d-85d3-4b4b82a950a3

Metadata

clamav_sigMALWARE.Win.Trojan.Bobik

Tags:FILE

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