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DITEKSHEN_MALWARE_Win_Blitzgrabber

Detects BlitzGrabber infostealer

MalwareBlitzgrabberditekSHen detectionBSD 2-Clause LicenseCompiles with YARA-X
Author
ditekSHen
Date
2020-11-06
Modified
2024-11-01
Score / Quality
75 / 71

What this rule detects

Detects BlitzGrabber infostealer

Associated malware family: Blitzgrabber.

Targets: Windows PE.

It defines 12 patterns (11 text, 0 hex, 1 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
malware-win-blitzgrabber.yarBSD 2-Clause License
rule DITEKSHEN_MALWARE_Win_Blitzgrabber : FILE
{
	meta:
		description = "Detects BlitzGrabber infostealer"
		author = "ditekSHen"
		id = "4240527e-c2f8-5424-986a-c1616fafb9bb"
		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#L10468-L10487"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "8baceacf3c2af61e00b31e8106820b6f1ce2e7a9d98eaed965e698109ae08314"
		score = 75
		quality = 71
		tags = "FILE"

	strings:
		$x1 = "**BLITZED GRABBER V" wide
		$x2 = "\\BlitzedGrabberV" ascii
		$x3 = "Kyanite" ascii wide nocase
		$s1 = /;\/\/(SCREENSHOT|PASSWORDS|FORKBOMB|MELTSTUB)\/\// ascii wide
		$s2 = "KryptedWare" wide
		$s3 = "chckcopyTemp" wide
		$s4 = "chckscreenShot" wide
		$s5 = "Plugin.Banking." ascii
		$s6 = "sChromiumPswPaths" ascii
		$s7 = ".CreateDownloadLink(" ascii
		$s8 = "CaptureScreen()" ascii
		$s9 = ".UploadFile(\"https://api.anonfiles.com/upload\"" ascii

	condition:
		uint16( 0 ) == 0x5a4d and ( 1 of ( $x* ) and 3 of ( $s* ) ) or ( 7 of ( $s* ) )
}

Strings (12 patterns)

IdentifierTypeValueModifiers
$x1text"**BLITZED GRABBER V"wide
$x2text"\\BlitzedGrabberV"ascii
$x3text"Kyanite"ascii wide nocase
$s1regex/;\/\/(SCREENSHOT|PASSWORDS|FORKBOMB|MELTSTUB)\/\//ascii wide
$s2text"KryptedWare"wide
$s3text"chckcopyTemp"wide
$s4text"chckscreenShot"wide
$s5text"Plugin.Banking."ascii
$s6text"sChromiumPswPaths"ascii
$s7text".CreateDownloadLink("ascii
$s8text"CaptureScreen()"ascii
$s9text".UploadFile(\"https://api.anonfiles.com/upload\""ascii

Condition

uint16( 0 ) == 0x5a4d and ( 1 of ( $x* ) and 3 of ( $s* ) ) or ( 7 of ( $s* ) )

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • At least 1 patterns in ( $x* ) must match.
  • At least 3 patterns in ( $s* ) must match.
  • At least 7 patterns in ( $s* ) 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: 4240527e-c2f8-5424-986a-c1616fafb9bb

Tags:FILE

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