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MALPEDIA_Win_Revc2_Auto

autogenerated rule brought to you by yara-signator

MalwareRevc2Malpedia 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: Revc2.

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

Summary generated from the rule's metadata and condition.

Rule source

win-revc2-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Revc2_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "4c95db96-0a02-5216-ab93-0489734f34c6"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.revc2"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.revc2_auto.yar#L1-L134"
		license_url = "N/A"
		logic_hash = "9766a2dda3a35ffc17577c5196440407523e45a8c26acb0e07f70d0974815690"
		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 = { eb4b ba01000000 eb44 488d054a031600 41b980620100 4c8d0581fe1500 4889442420 }
		$sequence_1 = { 90 488b8da8010000 4833cc e8???????? 4c8d9c24d0020000 498b5b30 410f2873f0 }
		$sequence_2 = { e8???????? 8bd8 488b07 488b7c2440 488906 85db 750b }
		$sequence_3 = { e9???????? 488d050e011700 bb0b000000 8bcb 4889442420 41b942300100 4c8d0539fc1600 }
		$sequence_4 = { bf04000000 eb2d 4183f864 720b bf03000000 448d5f61 eb1c }
		$sequence_5 = { e8???????? 488bf0 4885c0 0f8488000000 0f57c0 33c0 0f1106 }
		$sequence_6 = { 4d8bd8 0f85b7020000 498b08 4c3bc9 0f85ce000000 498b4810 80791800 }
		$sequence_7 = { e8???????? 488bd8 48894508 8b45e4 8945e4 0fb6463f 884588 }
		$sequence_8 = { ba07000000 488995b0080000 664489bd98080000 488b4c2440 488b01 4c8931 4885c0 }
		$sequence_9 = { 8b4530 03c9 3345fc 0bf1 33451c 418bcf 334504 }

	condition:
		7 of them and filesize < 5108736
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ eb4b ba01000000 eb44 488d054a031600 41b980620100 4c8d0581fe1500 4889442420 }
$sequence_1hex{ 90 488b8da8010000 4833cc e8???????? 4c8d9c24d0020000 498b5b30 410f2873f0 }
$sequence_2hex{ e8???????? 8bd8 488b07 488b7c2440 488906 85db 750b }
$sequence_3hex{ e9???????? 488d050e011700 bb0b000000 8bcb 4889442420 41b942300100 4c8d0539fc1600 }
$sequence_4hex{ bf04000000 eb2d 4183f864 720b bf03000000 448d5f61 eb1c }
$sequence_5hex{ e8???????? 488bf0 4885c0 0f8488000000 0f57c0 33c0 0f1106 }
$sequence_6hex{ 4d8bd8 0f85b7020000 498b08 4c3bc9 0f85ce000000 498b4810 80791800 }
$sequence_7hex{ e8???????? 488bd8 48894508 8b45e4 8945e4 0fb6463f 884588 }
$sequence_8hex{ ba07000000 488995b0080000 664489bd98080000 488b4c2440 488b01 4c8931 4885c0 }
$sequence_9hex{ 8b4530 03c9 3345fc 0bf1 33451c 418bcf 334504 }

Condition

7 of them and filesize < 5108736

In plain words (Heuristic)

  • The file must be smaller than 5108736 (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: 4c95db96-0a02-5216-ab93-0489734f34c6

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