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MALPEDIA_Win_Tclient_Auto

autogenerated rule brought to you by yara-signator

MalwareTclientMalpedia 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: Tclient.

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

Summary generated from the rule's metadata and condition.

Rule source

win-tclient-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Tclient_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "591e1c56-3c76-53f9-a688-f311b650ab6e"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.tclient"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.tclient_auto.yar#L1-L134"
		license_url = "N/A"
		logic_hash = "786b00ff98122aadf50a4ee3367b9930a20b391637977101bfcb83b7f7a482a3"
		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 = { f7d0 03d7 0bc2 8955f4 33c7 03461c 8db1827e53f7 }
		$sequence_1 = { eb83 83a68c00000000 8bce e8???????? 8bc7 eb05 b853ffffff }
		$sequence_2 = { c1c105 33c7 034b34 8b5da8 03c8 03ce c1c31e }
		$sequence_3 = { 0fb7c2 42 c6440804c0 0fb7c2 42 c644080414 0fb7c2 }
		$sequence_4 = { bbff00ff00 c1c008 c1ce08 23c3 81e600ff00ff 0bf0 8b4204 }
		$sequence_5 = { e8???????? 83c40c 85db 7e38 8b953cffffff 8bce 6a0d }
		$sequence_6 = { 6800080000 53 8d85f4f4ffff 50 e8???????? 83c430 8d85fcfdffff }
		$sequence_7 = { 5d c3 55 8bec 85c9 7429 85d2 }
		$sequence_8 = { 8be5 5d c3 55 8bec 85c9 7435 }
		$sequence_9 = { 7405 e8???????? b81c010000 8d8efc010000 8819 41 83e801 }

	condition:
		7 of them and filesize < 1063936
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ f7d0 03d7 0bc2 8955f4 33c7 03461c 8db1827e53f7 }
$sequence_1hex{ eb83 83a68c00000000 8bce e8???????? 8bc7 eb05 b853ffffff }
$sequence_2hex{ c1c105 33c7 034b34 8b5da8 03c8 03ce c1c31e }
$sequence_3hex{ 0fb7c2 42 c6440804c0 0fb7c2 42 c644080414 0fb7c2 }
$sequence_4hex{ bbff00ff00 c1c008 c1ce08 23c3 81e600ff00ff 0bf0 8b4204 }
$sequence_5hex{ e8???????? 83c40c 85db 7e38 8b953cffffff 8bce 6a0d }
$sequence_6hex{ 6800080000 53 8d85f4f4ffff 50 e8???????? 83c430 8d85fcfdffff }
$sequence_7hex{ 5d c3 55 8bec 85c9 7429 85d2 }
$sequence_8hex{ 8be5 5d c3 55 8bec 85c9 7435 }
$sequence_9hex{ 7405 e8???????? b81c010000 8d8efc010000 8819 41 83e801 }

Condition

7 of them and filesize < 1063936

In plain words (Heuristic)

  • The file must be smaller than 1063936 (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: 591e1c56-3c76-53f9-a688-f311b650ab6e

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