YARA · Malpedia signator rules
MALPEDIA_Win_Httpbrowser_Auto
autogenerated rule brought to you by yara-signator
MalwareHttpbrowserMalpedia 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: Httpbrowser.
It defines 16 patterns (0 text, 16 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-httpbrowser-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Httpbrowser_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "d7d6a17e-ebd2-59b6-a30a-dfc4732a0f4f"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.httpbrowser"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.httpbrowser_auto.yar#L1-L167"
= "N/A"
= "696e89d51eb9474a706e4786e941195bddaba051903e7f09c73fe589e5785ea6"
= 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 = { 8d85fcfdffff 50 68???????? 53 }
$sequence_1 = { 8d85eefdffff 56 50 e8???????? 8d85ecfdffff 50 }
$sequence_2 = { 8985f0edffff ffd7 83c41c 89b5f8edffff 39b5f0edffff 0f8eb1000000 }
$sequence_3 = { a5 a5 a5 a5 a4 6a07 59 }
$sequence_4 = { be???????? 8dbda8fcffff a5 a5 }
$sequence_5 = { 8945f0 85db 0f8489010000 85c0 0f8481010000 }
$sequence_6 = { 757e 6a04 5f ff15???????? }
$sequence_7 = { 53 53 ffb5f8fdffff ffd6 85c0 757e }
$sequence_8 = { c3 50 50 9c b80a000000 51 b932000000 }
$sequence_9 = { 6a5c 52 66c7000000 e8???????? 50 }
$sequence_10 = { 8b4510 8b55f0 8b4d14 03c2 3bc1 894510 }
$sequence_11 = { 9d 58 8b45f8 50 ff15???????? 8b45f4 }
$sequence_12 = { 33c0 8dbda1edffff 8895a0edffff f3ab 66ab }
$sequence_13 = { 81ec04020000 53 56 57 33d2 }
$sequence_14 = { 7422 66891f 83c702 57 }
$sequence_15 = { ff15???????? 8b750c 68000000a0 8d9514f5ffff 50 }
condition:
7 of them and filesize < 188416
}
Strings (16 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 8d85fcfdffff 50 68???????? 53 } | |
| $sequence_1 | hex | { 8d85eefdffff 56 50 e8???????? 8d85ecfdffff 50 } | |
| $sequence_2 | hex | { 8985f0edffff ffd7 83c41c 89b5f8edffff 39b5f0edffff 0f8eb1000000 } | |
| $sequence_3 | hex | { a5 a5 a5 a5 a4 6a07 59 } | |
| $sequence_4 | hex | { be???????? 8dbda8fcffff a5 a5 } | |
| $sequence_5 | hex | { 8945f0 85db 0f8489010000 85c0 0f8481010000 } | |
| $sequence_6 | hex | { 757e 6a04 5f ff15???????? } | |
| $sequence_7 | hex | { 53 53 ffb5f8fdffff ffd6 85c0 757e } | |
| $sequence_8 | hex | { c3 50 50 9c b80a000000 51 b932000000 } | |
| $sequence_9 | hex | { 6a5c 52 66c7000000 e8???????? 50 } | |
| $sequence_10 | hex | { 8b4510 8b55f0 8b4d14 03c2 3bc1 894510 } | |
| $sequence_11 | hex | { 9d 58 8b45f8 50 ff15???????? 8b45f4 } | |
| $sequence_12 | hex | { 33c0 8dbda1edffff 8895a0edffff f3ab 66ab } | |
| $sequence_13 | hex | { 81ec04020000 53 56 57 33d2 } | |
| $sequence_14 | hex | { 7422 66891f 83c702 57 } | |
| $sequence_15 | hex | { ff15???????? 8b750c 68000000a0 8d9514f5ffff 50 } |
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
Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.
Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.
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: d7d6a17e-ebd2-59b6-a30a-dfc4732a0f4f
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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