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DITEKSHEN_MALWARE_Win_Flagpro

Detects Flagpro

MalwareFlagproditekSHen 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 Flagpro

Associated malware family: Flagpro.

Targets: Windows PE.

It defines 10 patterns (8 text, 0 hex, 2 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
malware-win-flagpro.yarBSD 2-Clause License
rule DITEKSHEN_MALWARE_Win_Flagpro : FILE
{
	meta:
		description = "Detects Flagpro"
		author = "ditekSHen"
		id = "da1bf899-feb5-5ed0-956e-c20bc3565a6e"
		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#L9032-L9049"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "c5e5944426b7be690ad62dd0d98a8fc6f8135cab0dbdd8a5aaf1670491eda59d"
		score = 75
		quality = 75
		tags = "FILE"

	strings:
		$s1 = "download...." fullword ascii
		$s2 = "~MYTEMP" fullword wide
		$s3 = ".?AVCV20_LoaderApp@@" fullword ascii
		$s4 = ".?AVCV20_LoaderDlg@@" fullword ascii
		$s5 = "ExecYes" fullword ascii
		$s6 = /<BODY ID=CV\d+_LoaderDlg BGCOLOR=/ ascii
		$n1 = "://139.162.87.180" wide
		$n2 = "://172.104.109.217" wide
		$n3 = "://org.misecure.com/index.html" wide
		$b1 = /(get all|click|close|maybe|get_outerHTML|download\d) (finished|pass|ok|windows|failed)!/ fullword ascii

	condition:
		uint16( 0 ) == 0x5a4d and 4 of ( $s* ) or ( 1 of ( $n* ) and ( 2 of ( $s* ) or 1 of ( $b* ) ) ) or ( 2 of ( $s* ) and 1 of ( $b* ) )
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$s1text"download...."fullword ascii
$s2text"~MYTEMP"fullword wide
$s3text".?AVCV20_LoaderApp@@"fullword ascii
$s4text".?AVCV20_LoaderDlg@@"fullword ascii
$s5text"ExecYes"fullword ascii
$s6regex/<BODY ID=CV\d+_LoaderDlg BGCOLOR=/ascii
$n1text"://139.162.87.180"wide
$n2text"://172.104.109.217"wide
$n3text"://org.misecure.com/index.html"wide
$b1regex/(get all|click|close|maybe|get_outerHTML|download\d) (finished|pass|ok|windows|failed)!/fullword ascii

Condition

uint16( 0 ) == 0x5a4d and 4 of ( $s* ) or ( 1 of ( $n* ) and ( 2 of ( $s* ) or 1 of ( $b* ) ) ) or ( 2 of ( $s* ) and 1 of ( $b* ) )

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • At least 4 patterns in ( $s* ) must match.
  • At least 1 patterns in ( $n* ) must match.
  • At least 2 patterns in ( $s* ) must match.
  • At least 1 patterns in ( $b* ) 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: da1bf899-feb5-5ed0-956e-c20bc3565a6e

Tags:FILE

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