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YARA · ditekSHen detection

DITEKSHEN_MALWARE_Win_Betabot

BetaBot payload

MalwareBetabotditekSHen detectionBSD 2-Clause LicenseCompiles with YARA-X
Author
ditekSHen
Date
2020-11-06
Modified
2024-11-01
Score / Quality
75 / 73

What this rule detects

BetaBot payload

Associated malware family: Betabot.

Targets: Windows PE.

It defines 5 patterns (5 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
malware-win-betabot.yarBSD 2-Clause License
rule DITEKSHEN_MALWARE_Win_Betabot : FILE
{
	meta:
		description = "BetaBot payload"
		author = "ditekSHen"
		id = "377c500c-5727-5bea-ac46-cb69c868a607"
		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#L1654-L1666"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "e594d01874ee622169d6708ddc6cfde7f1d26d2bea1604961dc860700e8a1d5d"
		score = 75
		quality = 73
		tags = "FILE"

	strings:
		$s1 = "__restart" fullword ascii
		$s2 = "%SystemRoot%\\SysWOW64\\tapi3.dll" fullword wide
		$s3 = "%SystemRoot%\\system32\\tapi3.dll" fullword wide
		$s4 = "publicKeyToken=\"6595b64144ccf1df\"" ascii
		$s5 = "VirtualProtectEx" fullword ascii

	condition:
		uint16( 0 ) == 0x5a4d and filesize < 600KB and all of them
}

Strings (5 patterns)

IdentifierTypeValueModifiers
$s1text"__restart"fullword ascii
$s2text"%SystemRoot%\\SysWOW64\\tapi3.dll"fullword wide
$s3text"%SystemRoot%\\system32\\tapi3.dll"fullword wide
$s4text"publicKeyToken=\"6595b64144ccf1df\""ascii
$s5text"VirtualProtectEx"fullword ascii

Condition

uint16( 0 ) == 0x5a4d and filesize < 600KB and all of them

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • The file must be smaller than 600KB (a cheap guard that skips large files).
  • All 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: 377c500c-5727-5bea-ac46-cb69c868a607

Tags:FILE

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