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MALPEDIA_Win_Rombertik_Auto

autogenerated rule brought to you by yara-signator

MalwareRombertikMalpedia signator rulesCreative Commons Attribution-ShareAlike 4.0Compiles with YARA-X
Author
Felix Bilstein - yara-signator at cocacoding dot com
Date
2026-05-04
Modified
2026-05-18
Score / Quality
75 / 75

What this rule detects

autogenerated rule brought to you by yara-signator

Associated malware family: Rombertik.

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

Summary generated from the rule's metadata and condition.

Rule source

win-rombertik-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Rombertik_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "7aa70c23-232c-5b21-a7bd-0ec818b6fe5f"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.rombertik"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.rombertik_auto.yar#L1-L120"
		license_url = "N/A"
		logic_hash = "fc5e4e935c91415f8beac32f0f98ebdd7353fdfe2ac51f6fae8364c710d9db56"
		score = 75
		quality = 75
		tags = "FILE"
		version = "1"
		tool = "yara-signator v0.6.0"
		signator_config = "callsandjumps;datarefs;binvalue"
		malpedia_rule_date = "20260422"
		malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
		malpedia_version = "20260504"
		malpedia_license = "CC BY-SA 4.0"
		malpedia_sharing = "TLP:WHITE"

	strings:
		$sequence_0 = { 75f9 2bc6 03c1 03c7 8d4c187e }
		$sequence_1 = { 8945f8 ff15???????? b8???????? 40 3818 75fb 8b35???????? }
		$sequence_2 = { 6a00 50 ff15???????? 898608010000 }
		$sequence_3 = { 52 6800010000 50 ff15???????? f7d8 1bc0 f7d8 }
		$sequence_4 = { 6a00 6a00 6a00 6818000900 50 ff15???????? }
		$sequence_5 = { 68ffff1f00 ff15???????? 8bf0 3bf3 7473 }
		$sequence_6 = { 8d95e0feffff 52 ffd7 85c0 }
		$sequence_7 = { 83c410 85c0 7409 6a00 ffd0 83c404 5e }
		$sequence_8 = { 60 8b75fc bf???????? 8b4df8 f3a4 }
		$sequence_9 = { 50 52 8d85f4feffff 57 50 e8???????? }

	condition:
		7 of them and filesize < 73728
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 75f9 2bc6 03c1 03c7 8d4c187e }
$sequence_1hex{ 8945f8 ff15???????? b8???????? 40 3818 75fb 8b35???????? }
$sequence_2hex{ 6a00 50 ff15???????? 898608010000 }
$sequence_3hex{ 52 6800010000 50 ff15???????? f7d8 1bc0 f7d8 }
$sequence_4hex{ 6a00 6a00 6a00 6818000900 50 ff15???????? }
$sequence_5hex{ 68ffff1f00 ff15???????? 8bf0 3bf3 7473 }
$sequence_6hex{ 8d95e0feffff 52 ffd7 85c0 }
$sequence_7hex{ 83c410 85c0 7409 6a00 ffd0 83c404 5e }
$sequence_8hex{ 60 8b75fc bf???????? 8b4df8 f3a4 }
$sequence_9hex{ 50 52 8d85f4feffff 57 50 e8???????? }

Condition

7 of them and filesize < 73728

In plain words (Heuristic)

  • The file must be smaller than 73728 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

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References

Licence & attribution

Author: Felix Bilstein - yara-signator at cocacoding dot com

Source repository: Malpedia signator rules @ c901f97b7d

Licence: Creative Commons Attribution-ShareAlike 4.0 (repository licence)

Original rule

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

Rule id: 7aa70c23-232c-5b21-a7bd-0ec818b6fe5f

Metadata

version1
toolyara-signator v0.6.0
signator_configcallsandjumps;datarefs;binvalue
malpedia_rule_date20260422
malpedia_hasha182e35da64e6d71cb55f125c4d4225196523f14
malpedia_version20260504
malpedia_licenseCC BY-SA 4.0
malpedia_sharingTLP:WHITE

Tags:FILE