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DITEKSHEN_MALWARE_Win_PWSH_Poshcookiestealer

Detects PowerShell PoshCookieStealer

MalwarePWSHditekSHen 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 PowerShell PoshCookieStealer

Associated malware family: PWSH.

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

Summary generated from the rule's metadata and condition.

Rule source

malware-win-pwsh-poshcookiestealer.yarBSD 2-Clause License
rule DITEKSHEN_MALWARE_Win_PWSH_Poshcookiestealer
{
	meta:
		description = "Detects PowerShell PoshCookieStealer"
		author = "ditekSHen"
		id = "7326a056-288b-534b-811d-172bd6936d7b"
		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#L9066-L9080"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "234958098d09732675dd539e8d25c6754ba50bf92b3a19e7fef8c68d70503ec4"
		score = 75
		quality = 75
		tags = ""

	strings:
		$s1 = "\\User Data\\default\\Network\\Cookies" ascii nocase
		$s2 = "Send-ToEmail" ascii
		$s3 = "[Security.Cryptography.ProtectedData]::Unprotect($" ascii
		$s4 = "$($env:LOCALAPPDATA)\\" ascii
		$s5 = "$($env:HOMEPATH)\\" ascii
		$s6 = "|ForEach-Object ToString X2) -join ''" ascii
		$s7 = ".Attachments.Add($" ascii

	condition:
		5 of them
}

Strings (7 patterns)

IdentifierTypeValueModifiers
$s1text"\\User Data\\default\\Network\\Cookies"ascii nocase
$s2text"Send-ToEmail"ascii
$s3text"[Security.Cryptography.ProtectedData]::Unprotect($"ascii
$s4text"$($env:LOCALAPPDATA)\\"ascii
$s5text"$($env:HOMEPATH)\\"ascii
$s6text"|ForEach-Object ToString X2) -join ''"ascii
$s7text".Attachments.Add($"ascii

Condition

5 of them

In plain words (Heuristic)

  • 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: 7326a056-288b-534b-811d-172bd6936d7b

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