YARA · Malpedia signator rules
MALPEDIA_Win_Hesperbot_Auto
autogenerated rule brought to you by yara-signator
MalwareHesperbotMalpedia 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: Hesperbot.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-hesperbot-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Hesperbot_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "f6aea63c-f69e-55d4-97f0-3c40d77d24ea"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.hesperbot"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.hesperbot_auto.yar#L1-L129"
= "N/A"
= "04a0a757bd6a1abed3c2e9cc240e3b373104813c31a80bae17dca4ea598f10fc"
= 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 = { 0f84e2000000 8bce e8???????? 8b4d10 }
$sequence_1 = { 8d4610 50 8d4608 50 56 ff15???????? 50 }
$sequence_2 = { 77ec eb04 8d744102 8bc6 5e c3 6a00 }
$sequence_3 = { 75f8 8d45e0 50 e8???????? e8???????? 8945ef }
$sequence_4 = { 85ff 742b 6a20 58 48 c6043800 75f9 }
$sequence_5 = { 7414 8b450c 894710 8b4510 33db 894714 43 }
$sequence_6 = { 33f6 46 8937 c7470466864173 c7470867864173 89770c e8???????? }
$sequence_7 = { 8a45fe 8a5dff 2403 004109 7418 2a5508 800940 }
$sequence_8 = { 33f6 56 8d45f8 50 8d45f4 50 ff7508 }
$sequence_9 = { 13f7 034c2458 1374245c 8344241440 894c2418 8974241c }
condition:
7 of them and filesize < 188416
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 0f84e2000000 8bce e8???????? 8b4d10 } | |
| $sequence_1 | hex | { 8d4610 50 8d4608 50 56 ff15???????? 50 } | |
| $sequence_2 | hex | { 77ec eb04 8d744102 8bc6 5e c3 6a00 } | |
| $sequence_3 | hex | { 75f8 8d45e0 50 e8???????? e8???????? 8945ef } | |
| $sequence_4 | hex | { 85ff 742b 6a20 58 48 c6043800 75f9 } | |
| $sequence_5 | hex | { 7414 8b450c 894710 8b4510 33db 894714 43 } | |
| $sequence_6 | hex | { 33f6 46 8937 c7470466864173 c7470867864173 89770c e8???????? } | |
| $sequence_7 | hex | { 8a45fe 8a5dff 2403 004109 7418 2a5508 800940 } | |
| $sequence_8 | hex | { 33f6 56 8d45f8 50 8d45f4 50 ff7508 } | |
| $sequence_9 | hex | { 13f7 034c2458 1374245c 8344241440 894c2418 8974241c } |
Condition
7 of them and filesize < 188416In plain words (Heuristic)
- The file must be smaller than 188416 (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: f6aea63c-f69e-55d4-97f0-3c40d77d24ea
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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