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MALPEDIA_Win_Sendsafe_Auto

autogenerated rule brought to you by yara-signator

MalwareSendsafeMalpedia 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: Sendsafe.

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

Summary generated from the rule's metadata and condition.

Rule source

win-sendsafe-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Sendsafe_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "22ecadd0-d25d-581d-9d09-ca00bea39407"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.sendsafe"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.sendsafe_auto.yar#L1-L134"
		license_url = "N/A"
		logic_hash = "ff3c7f30f228fce4b7d080e3cae62a8acf0fb6447b41041ce3863f984ead4db4"
		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 = { 8d8dfcfdffff 51 e8???????? 83c40c 8d95fcfdffff 52 e8???????? }
		$sequence_1 = { ff15???????? 85c0 7409 c745cc01000000 eb07 c745cc00000000 8a4dcc }
		$sequence_2 = { eb5c 8b55cc 8b4230 8b4dc8 8b1488 837a2c00 744a }
		$sequence_3 = { eb1a b816020000 25ffff0000 0d00000700 0d00000080 898578f6ffff 8b8d78f6ffff }
		$sequence_4 = { eb0f 8b4df4 51 e8???????? 83c404 8945e8 8b55e8 }
		$sequence_5 = { 8b8894000000 51 8d55dc 52 e8???????? 83c408 8d45dc }
		$sequence_6 = { e8???????? 8b45e8 898574ffffff 8b4d10 8b9574ffffff 8b01 3b4210 }
		$sequence_7 = { c741144d000000 8b5508 8b02 b904000000 6bd100 8b4dfc 894c1018 }
		$sequence_8 = { 83c40c 8d95fcfeffff 52 8b85f4faffff 50 8b8df8faffff e8???????? }
		$sequence_9 = { 8b8df0feffff 668901 e9???????? 8b95dcfeffff 83ea01 8995dcfeffff 8b4508 }

	condition:
		7 of them and filesize < 3743744
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 8d8dfcfdffff 51 e8???????? 83c40c 8d95fcfdffff 52 e8???????? }
$sequence_1hex{ ff15???????? 85c0 7409 c745cc01000000 eb07 c745cc00000000 8a4dcc }
$sequence_2hex{ eb5c 8b55cc 8b4230 8b4dc8 8b1488 837a2c00 744a }
$sequence_3hex{ eb1a b816020000 25ffff0000 0d00000700 0d00000080 898578f6ffff 8b8d78f6ffff }
$sequence_4hex{ eb0f 8b4df4 51 e8???????? 83c404 8945e8 8b55e8 }
$sequence_5hex{ 8b8894000000 51 8d55dc 52 e8???????? 83c408 8d45dc }
$sequence_6hex{ e8???????? 8b45e8 898574ffffff 8b4d10 8b9574ffffff 8b01 3b4210 }
$sequence_7hex{ c741144d000000 8b5508 8b02 b904000000 6bd100 8b4dfc 894c1018 }
$sequence_8hex{ 83c40c 8d95fcfeffff 52 8b85f4faffff 50 8b8df8faffff e8???????? }
$sequence_9hex{ 8b8df0feffff 668901 e9???????? 8b95dcfeffff 83ea01 8995dcfeffff 8b4508 }

Condition

7 of them and filesize < 3743744

In plain words (Heuristic)

  • The file must be smaller than 3743744 (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: 22ecadd0-d25d-581d-9d09-ca00bea39407

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