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MALPEDIA_Win_Amtsol_Auto

autogenerated rule brought to you by yara-signator

MalwareAmtsolMalpedia 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: Amtsol.

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

Summary generated from the rule's metadata and condition.

Rule source

win-amtsol-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Amtsol_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "610e7b35-7f0a-5ba1-b999-5bd60046d93f"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.amtsol"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.amtsol_auto.yar#L1-L131"
		license_url = "N/A"
		logic_hash = "ed00c83f511bca8c0c3d0585f98066d967f5b19ef305174aa0a360226a1bb072"
		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 = { ff36 ff7610 e8???????? 83c414 3bc3 0f8c92000000 0f8e8c000000 }
		$sequence_1 = { 7545 c745e4dfffffff eb6b c7456410000000 66894548 395de0 740e }
		$sequence_2 = { e8???????? 59 53 68???????? e8???????? 8d8580fdffff 50 }
		$sequence_3 = { e8???????? 83c40c c3 837c2404ff 7405 e9???????? c3 }
		$sequence_4 = { 56 8d45e0 50 57 e8???????? 83c418 }
		$sequence_5 = { 8bff 56 57 33ff 8db758304200 ff36 e8???????? }
		$sequence_6 = { 8bde 23d9 03bc98480c0000 337814 33d7 8bfa }
		$sequence_7 = { c685280100003c c685290100003c c6852a0100003c c6852b01000025 c6852c01000073 889d2d010000 }
		$sequence_8 = { 8d4508 50 e8???????? 59 59 8d4d08 894dd8 }
		$sequence_9 = { 8b03 85c0 755b 33db 43 899e2c030000 eb03 }

	condition:
		7 of them and filesize < 335872
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ ff36 ff7610 e8???????? 83c414 3bc3 0f8c92000000 0f8e8c000000 }
$sequence_1hex{ 7545 c745e4dfffffff eb6b c7456410000000 66894548 395de0 740e }
$sequence_2hex{ e8???????? 59 53 68???????? e8???????? 8d8580fdffff 50 }
$sequence_3hex{ e8???????? 83c40c c3 837c2404ff 7405 e9???????? c3 }
$sequence_4hex{ 56 8d45e0 50 57 e8???????? 83c418 }
$sequence_5hex{ 8bff 56 57 33ff 8db758304200 ff36 e8???????? }
$sequence_6hex{ 8bde 23d9 03bc98480c0000 337814 33d7 8bfa }
$sequence_7hex{ c685280100003c c685290100003c c6852a0100003c c6852b01000025 c6852c01000073 889d2d010000 }
$sequence_8hex{ 8d4508 50 e8???????? 59 59 8d4d08 894dd8 }
$sequence_9hex{ 8b03 85c0 755b 33db 43 899e2c030000 eb03 }

Condition

7 of them and filesize < 335872

In plain words (Heuristic)

  • The file must be smaller than 335872 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

Test this rule in your browser

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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: 610e7b35-7f0a-5ba1-b999-5bd60046d93f

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