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MALPEDIA_Win_Ismagent_Auto

autogenerated rule brought to you by yara-signator

MalwareIsmagentMalpedia 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: Ismagent.

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

Summary generated from the rule's metadata and condition.

Rule source

win-ismagent-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Ismagent_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "d30a21b6-9168-58ac-be0f-21bd6de3a54f"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.ismagent"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.ismagent_auto.yar#L1-L107"
		license_url = "N/A"
		logic_hash = "b9bb1dae4329c5eb1e40c0a1e6a1b949614e1a70afb3bd7bafc8905aff0f960d"
		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 = { 8816 eb3e c6060d 8b048d48404200 8854382a eb2e }
		$sequence_1 = { 8b048d48404200 5b 8b543818 8955ec }
		$sequence_2 = { 8bd7 2bd1 8a01 8d4901 884411ff 84c0 }
		$sequence_3 = { 6a44 83e103 6a00 f3a4 50 e8???????? 8b7c244c }
		$sequence_4 = { c1f806 6bc930 8b048548404200 f644082801 7406 8b440818 }
		$sequence_5 = { 53 8b5d10 8b048548404200 56 8b7508 57 8b4c0818 }
		$sequence_6 = { 8a01 41 84c0 75f9 2bca 0f8417010000 8d8424500b0000 }
		$sequence_7 = { 47 42 8d7001 90 8a08 40 }

	condition:
		7 of them and filesize < 327680
}

Strings (8 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 8816 eb3e c6060d 8b048d48404200 8854382a eb2e }
$sequence_1hex{ 8b048d48404200 5b 8b543818 8955ec }
$sequence_2hex{ 8bd7 2bd1 8a01 8d4901 884411ff 84c0 }
$sequence_3hex{ 6a44 83e103 6a00 f3a4 50 e8???????? 8b7c244c }
$sequence_4hex{ c1f806 6bc930 8b048548404200 f644082801 7406 8b440818 }
$sequence_5hex{ 53 8b5d10 8b048548404200 56 8b7508 57 8b4c0818 }
$sequence_6hex{ 8a01 41 84c0 75f9 2bca 0f8417010000 8d8424500b0000 }
$sequence_7hex{ 47 42 8d7001 90 8a08 40 }

Condition

7 of them and filesize < 327680

In plain words (Heuristic)

  • The file must be smaller than 327680 (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: d30a21b6-9168-58ac-be0f-21bd6de3a54f

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