YARA · Malpedia signator rules
MALPEDIA_Win_Newbounce_Auto
autogenerated rule brought to you by yara-signator
MalwareNewbounceMalpedia 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: Newbounce.
It defines 15 patterns (0 text, 15 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-newbounce-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Newbounce_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "554f1f64-8795-5f81-a4e0-9ae2b3fe03d2"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.newbounce"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.newbounce_auto.yar#L1-L144"
= "N/A"
= "5871c2f4b934fe6925fce9367be6b26e7a02354d682ba41ca50d8bbad1475c5c"
= 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 = { 83e00f 7e05 2bf0 83c610 }
$sequence_1 = { 7cd4 2983d0010000 3bfe 7530 }
$sequence_2 = { 7cd6 488d0d527a0200 e8???????? 448b460c }
$sequence_3 = { 7cba 4863c3 6644893447 eb31 }
$sequence_4 = { 7cca 488d0d108f0200 448bc6 8bd3 }
$sequence_5 = { 7cd5 81fb401f0000 750d 44392d???????? }
$sequence_6 = { 7cdd 488b8c2420100000 4833cc e8???????? }
$sequence_7 = { 7cc4 4883c8ff eb03 488bc7 }
$sequence_8 = { 81e7ff000000 3304bd485b6300 895c2458 3304ad48536300 }
$sequence_9 = { 81e7ff000000 89442444 89bc24c8000000 8bf8 c1e818 8b0485485b6300 }
$sequence_10 = { 81e7ff000000 896c2410 8be8 8b04bd48536300 }
$sequence_11 = { 81e7ff000000 330cbd48576300 c1e208 330c8548536300 }
$sequence_12 = { 81e7ff000000 3304bd485f6300 33442418 33442410 }
$sequence_13 = { 81e7???????? e8???????? 6aff 6aff 8d4510 50 ff15???????? }
$sequence_14 = { 81e7ff000000 8b0cbd48576300 894c241c 8b0c9d48536300 }
condition:
7 of them and filesize < 8637440
}
Strings (15 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 83e00f 7e05 2bf0 83c610 } | |
| $sequence_1 | hex | { 7cd4 2983d0010000 3bfe 7530 } | |
| $sequence_2 | hex | { 7cd6 488d0d527a0200 e8???????? 448b460c } | |
| $sequence_3 | hex | { 7cba 4863c3 6644893447 eb31 } | |
| $sequence_4 | hex | { 7cca 488d0d108f0200 448bc6 8bd3 } | |
| $sequence_5 | hex | { 7cd5 81fb401f0000 750d 44392d???????? } | |
| $sequence_6 | hex | { 7cdd 488b8c2420100000 4833cc e8???????? } | |
| $sequence_7 | hex | { 7cc4 4883c8ff eb03 488bc7 } | |
| $sequence_8 | hex | { 81e7ff000000 3304bd485b6300 895c2458 3304ad48536300 } | |
| $sequence_9 | hex | { 81e7ff000000 89442444 89bc24c8000000 8bf8 c1e818 8b0485485b6300 } | |
| $sequence_10 | hex | { 81e7ff000000 896c2410 8be8 8b04bd48536300 } | |
| $sequence_11 | hex | { 81e7ff000000 330cbd48576300 c1e208 330c8548536300 } | |
| $sequence_12 | hex | { 81e7ff000000 3304bd485f6300 33442418 33442410 } | |
| $sequence_13 | hex | { 81e7???????? e8???????? 6aff 6aff 8d4510 50 ff15???????? } | |
| $sequence_14 | hex | { 81e7ff000000 8b0cbd48576300 894c241c 8b0c9d48536300 } |
Condition
7 of them and filesize < 8637440In plain words (Heuristic)
- The file must be smaller than 8637440 (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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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: 554f1f64-8795-5f81-a4e0-9ae2b3fe03d2
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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