YARA · Malpedia signator rules
MALPEDIA_Win_Temp_Stealer_Auto
autogenerated rule brought to you by yara-signator
MalwareTemp StealerMalpedia 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: Temp Stealer.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-temp-stealer-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Temp_Stealer_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "2a3d7e56-ade6-5388-9ba8-30989bb7bbe4"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.temp_stealer"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.temp_stealer_auto.yar#L1-L132"
= "N/A"
= "911de5b49c403e2d606ceae10e3002c8ec55903f278dc5636e841d1eb2417be1"
= 75
= 75
= "FILE"
= "1"
= "yara-signator v0.6.0"
= "callsandjumps;datarefs;binvalue"
= "20260422"
= "a182e35da64e6d71cb55f125c4d4225196523f14"
= "20260504"
= "CC BY-SA 4.0"
= "TLP:WHITE"
strings:
$sequence_0 = { e9???????? 418bed 488d158d460200 4d8bfa e9???????? 418bc5 f7d0 }
$sequence_1 = { 410f93c1 8bd3 418bcd 488d45d7 4584c9 480f4545d7 41ffc5 }
$sequence_2 = { 48837f1808 7203 488b17 4c8bc3 488d8d00020000 e8???????? 488d9500020000 }
$sequence_3 = { 48634804 488d442430 4803c8 4533c0 8bd7 e8???????? 41f6de }
$sequence_4 = { e8???????? 408ac7 488b9c2428010000 4881c4e0000000 415f 415e 415d }
$sequence_5 = { 4c89642420 4c89642430 4c896c2438 4c8d0d697a0300 8bd3 488d4c2420 e8???????? }
$sequence_6 = { 488bd0 488d4c2440 e8???????? 488d1574670300 488d4d18 e8???????? 488bd0 }
$sequence_7 = { 483bc3 742c 488d4c2450 e8???????? 0f1003 0f11442450 }
$sequence_8 = { b908000000 4c8d058f660100 488d1590660100 e8???????? 4c8d0d9c660100 b90b000000 }
$sequence_9 = { 488d4c2458 e8???????? 488d4dc8 48395de0 480f434dc8 ff15???????? 83f8ff }
condition:
7 of them and filesize < 652288
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { e9???????? 418bed 488d158d460200 4d8bfa e9???????? 418bc5 f7d0 } | |
| $sequence_1 | hex | { 410f93c1 8bd3 418bcd 488d45d7 4584c9 480f4545d7 41ffc5 } | |
| $sequence_2 | hex | { 48837f1808 7203 488b17 4c8bc3 488d8d00020000 e8???????? 488d9500020000 } | |
| $sequence_3 | hex | { 48634804 488d442430 4803c8 4533c0 8bd7 e8???????? 41f6de } | |
| $sequence_4 | hex | { e8???????? 408ac7 488b9c2428010000 4881c4e0000000 415f 415e 415d } | |
| $sequence_5 | hex | { 4c89642420 4c89642430 4c896c2438 4c8d0d697a0300 8bd3 488d4c2420 e8???????? } | |
| $sequence_6 | hex | { 488bd0 488d4c2440 e8???????? 488d1574670300 488d4d18 e8???????? 488bd0 } | |
| $sequence_7 | hex | { 483bc3 742c 488d4c2450 e8???????? 0f1003 0f11442450 } | |
| $sequence_8 | hex | { b908000000 4c8d058f660100 488d1590660100 e8???????? 4c8d0d9c660100 b90b000000 } | |
| $sequence_9 | hex | { 488d4c2458 e8???????? 488d4dc8 48395de0 480f434dc8 ff15???????? 83f8ff } |
Condition
7 of them and filesize < 652288In plain words (Heuristic)
- The file must be smaller than 652288 (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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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)
Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.
Rule id: 2a3d7e56-ade6-5388-9ba8-30989bb7bbe4
Metadata
| 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 |
Tags:FILE
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