YARA · Malpedia signator rules
MALPEDIA_Win_Jolob_Auto
autogenerated rule brought to you by yara-signator
- 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: Jolob.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-jolob-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Jolob_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "721dfc29-3d7a-50b0-b764-61d802bd0c74"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.jolob"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.jolob_auto.yar#L1-L124"
= "N/A"
= "4150b0410a36ec9d51a01ff653e14685bef906d672dd1b0e0c49b7b207630fa5"
= 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 = { 743a 397e28 7435 8d7e10 }
$sequence_1 = { 56 ff742408 ff15???????? 8bf0 85f6 740e 56 }
$sequence_2 = { c7461804000000 8b8f28080000 8b09 6a01 50 51 894e24 }
$sequence_3 = { 8a8df9feffff 40 40 03c6 8808 0fbed1 8d7801 }
$sequence_4 = { 5d c20400 ff15???????? 83f840 e9???????? 8b4c240c }
$sequence_5 = { c644041400 75f8 8d442420 50 ff730c e8???????? 85c0 }
$sequence_6 = { 8975f8 ff15???????? 33c0 40 5f 5e c9 }
$sequence_7 = { 84db 7431 2b4c2410 8b542410 }
$sequence_8 = { e8???????? 89460c 8b06 0faf4604 59 8b4e2c 894608 }
$sequence_9 = { 8b4dfc 03c1 740d 6a00 }
condition:
7 of them and filesize < 196608
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 743a 397e28 7435 8d7e10 } | |
| $sequence_1 | hex | { 56 ff742408 ff15???????? 8bf0 85f6 740e 56 } | |
| $sequence_2 | hex | { c7461804000000 8b8f28080000 8b09 6a01 50 51 894e24 } | |
| $sequence_3 | hex | { 8a8df9feffff 40 40 03c6 8808 0fbed1 8d7801 } | |
| $sequence_4 | hex | { 5d c20400 ff15???????? 83f840 e9???????? 8b4c240c } | |
| $sequence_5 | hex | { c644041400 75f8 8d442420 50 ff730c e8???????? 85c0 } | |
| $sequence_6 | hex | { 8975f8 ff15???????? 33c0 40 5f 5e c9 } | |
| $sequence_7 | hex | { 84db 7431 2b4c2410 8b542410 } | |
| $sequence_8 | hex | { e8???????? 89460c 8b06 0faf4604 59 8b4e2c 894608 } | |
| $sequence_9 | hex | { 8b4dfc 03c1 740d 6a00 } |
Condition
7 of them and filesize < 196608In plain words (Heuristic)
- The file must be smaller than 196608 (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: 721dfc29-3d7a-50b0-b764-61d802bd0c74
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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