YARA · Malpedia signator rules
MALPEDIA_Win_Glassrat_Auto
autogenerated rule brought to you by yara-signator
MalwareGlassratMalpedia 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: Glassrat.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-glassrat-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Glassrat_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "f8a6e9f1-2316-5505-905f-c231b2b4c23c"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.glassrat"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.glassrat_auto.yar#L1-L119"
= "N/A"
= "0bec3c726d0ad874e11ab5ede48aa2be068822b1935ab31e541a262f0fd12ab3"
= 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 = { ff15???????? 85c0 7f0e 5f }
$sequence_1 = { 7408 6a00 ff15???????? 8b842424010000 8b8c2420010000 8b942418010000 }
$sequence_2 = { 895de0 50 56 ff15???????? }
$sequence_3 = { 68007f0000 53 89442438 ff15???????? 53 89442438 }
$sequence_4 = { 8b3d???????? 8d542404 56 52 33f6 ffd7 85c0 }
$sequence_5 = { 8b45cc 50 51 ff15???????? 8b95c4feffff }
$sequence_6 = { 53 ffd5 8b5e24 8d542410 52 }
$sequence_7 = { 8bc8 8b4504 83e103 83f8ff f3a4 741a 6a02 }
$sequence_8 = { 8b5e28 8d442410 50 53 ffd7 85c0 7403 }
$sequence_9 = { 2bc2 3bc8 b802000000 0f85b4000000 }
condition:
7 of them and filesize < 81920
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { ff15???????? 85c0 7f0e 5f } | |
| $sequence_1 | hex | { 7408 6a00 ff15???????? 8b842424010000 8b8c2420010000 8b942418010000 } | |
| $sequence_2 | hex | { 895de0 50 56 ff15???????? } | |
| $sequence_3 | hex | { 68007f0000 53 89442438 ff15???????? 53 89442438 } | |
| $sequence_4 | hex | { 8b3d???????? 8d542404 56 52 33f6 ffd7 85c0 } | |
| $sequence_5 | hex | { 8b45cc 50 51 ff15???????? 8b95c4feffff } | |
| $sequence_6 | hex | { 53 ffd5 8b5e24 8d542410 52 } | |
| $sequence_7 | hex | { 8bc8 8b4504 83e103 83f8ff f3a4 741a 6a02 } | |
| $sequence_8 | hex | { 8b5e28 8d442410 50 53 ffd7 85c0 7403 } | |
| $sequence_9 | hex | { 2bc2 3bc8 b802000000 0f85b4000000 } |
Condition
7 of them and filesize < 81920In plain words (Heuristic)
- The file must be smaller than 81920 (a cheap guard that skips large files).
- At least 7 patterns in the rule must match.
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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: f8a6e9f1-2316-5505-905f-c231b2b4c23c
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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