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MALPEDIA_Win_Phobos_Auto

autogenerated rule brought to you by yara-signator

MalwarePhobosMalpedia 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: Phobos.

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

Summary generated from the rule's metadata and condition.

Rule source

win-phobos-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Phobos_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "2f4fc51d-9af7-5229-9129-309a38ae3ac9"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.phobos"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.phobos_auto.yar#L1-L126"
		license_url = "N/A"
		logic_hash = "afd8e31d2a2cd18957b7d58683184c6d0bea6b893d89122b4ff289fbf034cbb8"
		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 = { e8???????? e8???????? eb1b 6a10 }
		$sequence_1 = { 89460c 0fbf4604 3bf8 7e18 8bcf 2bc8 03c9 }
		$sequence_2 = { ff36 ff15???????? 8bd8 f7db }
		$sequence_3 = { e8???????? 83c40c 8bc7 5f ebd2 55 8bec }
		$sequence_4 = { 53 56 57 8bf8 7505 e8???????? be???????? }
		$sequence_5 = { 0fb692a8a44000 23ce 0fb689a8a44000 c1e108 33ca 0fb6501e }
		$sequence_6 = { 51 53 56 8bf0 8b4508 33db 57 }
		$sequence_7 = { ff75fc ff7508 e8???????? 59 59 eb01 4f }
		$sequence_8 = { 85ff 7438 0fb70f 8bc7 eb11 83c002 }
		$sequence_9 = { e8???????? 8bf0 33db 59 3bf3 0f84ab000000 68a00f0000 }

	condition:
		7 of them and filesize < 139264
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ e8???????? e8???????? eb1b 6a10 }
$sequence_1hex{ 89460c 0fbf4604 3bf8 7e18 8bcf 2bc8 03c9 }
$sequence_2hex{ ff36 ff15???????? 8bd8 f7db }
$sequence_3hex{ e8???????? 83c40c 8bc7 5f ebd2 55 8bec }
$sequence_4hex{ 53 56 57 8bf8 7505 e8???????? be???????? }
$sequence_5hex{ 0fb692a8a44000 23ce 0fb689a8a44000 c1e108 33ca 0fb6501e }
$sequence_6hex{ 51 53 56 8bf0 8b4508 33db 57 }
$sequence_7hex{ ff75fc ff7508 e8???????? 59 59 eb01 4f }
$sequence_8hex{ 85ff 7438 0fb70f 8bc7 eb11 83c002 }
$sequence_9hex{ e8???????? 8bf0 33db 59 3bf3 0f84ab000000 68a00f0000 }

Condition

7 of them and filesize < 139264

In plain words (Heuristic)

  • The file must be smaller than 139264 (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: 2f4fc51d-9af7-5229-9129-309a38ae3ac9

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