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MALPEDIA_Win_Icexloader_Auto

autogenerated rule brought to you by yara-signator

MalwareIcexloaderMalpedia 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: Icexloader.

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

Summary generated from the rule's metadata and condition.

Rule source

win-icexloader-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Icexloader_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "e67eae07-fb93-5b45-9602-470a196337dd"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.icexloader"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.icexloader_auto.yar#L1-L133"
		license_url = "N/A"
		logic_hash = "e7d8b7bb37a7ff9b0391c595d5a3e089e1233fa9d3012ba9f46251bb3d0e3e70"
		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 = { 5d c3 55 89e5 53 83ec74 e8???????? }
		$sequence_1 = { 89d9 89d0 31db 31d2 01c8 8b4dd4 11da }
		$sequence_2 = { 8b4508 83c014 8945f8 8b4508 8b4010 8945f4 8b450c }
		$sequence_3 = { 5d e9???????? c705????????18000000 c705????????04000000 c605????????11 c705????????a0c54300 c705????????00000000 }
		$sequence_4 = { 744b 8b5210 897d08 8d65f4 89f1 5b 5e }
		$sequence_5 = { 55 ba7c000000 89e5 56 53 83ec30 894de4 }
		$sequence_6 = { 0f841a010000 8b85ecfeffff 8b95ecfeffff 8b5210 83ea01 83c204 }
		$sequence_7 = { 0fb7444b08 8d7101 8d9000280000 6681faff07 7718 0fb7547308 8d7102 }
		$sequence_8 = { 898554ffffff c78510ffffff00000000 c745a000000000 8b45a0 89459c 8b459c 894590 }
		$sequence_9 = { f7d8 eb03 42 eb94 83c40c 5b 5e }

	condition:
		7 of them and filesize < 656384
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 5d c3 55 89e5 53 83ec74 e8???????? }
$sequence_1hex{ 89d9 89d0 31db 31d2 01c8 8b4dd4 11da }
$sequence_2hex{ 8b4508 83c014 8945f8 8b4508 8b4010 8945f4 8b450c }
$sequence_3hex{ 5d e9???????? c705????????18000000 c705????????04000000 c605????????11 c705????????a0c54300 c705????????00000000 }
$sequence_4hex{ 744b 8b5210 897d08 8d65f4 89f1 5b 5e }
$sequence_5hex{ 55 ba7c000000 89e5 56 53 83ec30 894de4 }
$sequence_6hex{ 0f841a010000 8b85ecfeffff 8b95ecfeffff 8b5210 83ea01 83c204 }
$sequence_7hex{ 0fb7444b08 8d7101 8d9000280000 6681faff07 7718 0fb7547308 8d7102 }
$sequence_8hex{ 898554ffffff c78510ffffff00000000 c745a000000000 8b45a0 89459c 8b459c 894590 }
$sequence_9hex{ f7d8 eb03 42 eb94 83c40c 5b 5e }

Condition

7 of them and filesize < 656384

In plain words (Heuristic)

  • The file must be smaller than 656384 (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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Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.

Open in editor

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: e67eae07-fb93-5b45-9602-470a196337dd

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