YARA · Volexity threat-intel
VOLEXITY_Apt_Malware_Any_Reloadext_Plugin
Detection for RELOADEXT, a Google Chrome extension malware.
- Author
- threatintel@volexity.com
- Date
- 2024-02-23
- Modified
- 2024-08-02
- Score / Quality
- 75 / 80
What this rule detects
Detection for RELOADEXT, a Google Chrome extension malware.
It defines 5 patterns (5 text, 0 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
rule VOLEXITY_Apt_Malware_Any_Reloadext_Plugin : STORMBAMBOO FILE MEMORY
{
meta:
= "Detection for RELOADEXT, a Google Chrome extension malware."
= "threatintel@volexity.com"
= "6c6c8bee-2a13-5645-89ef-779f00264fd9"
= "2024-02-23"
= "2024-08-02"
= "TIB-20240227"
= "https://github.com/volexity/threat-intel/blob/3a9d0b52459877ee866a9a0ba06e60059b778c77/2024/2024-08-02 StormBamboo/rules.yar#L4-L36"
= "https://github.com/volexity/threat-intel/blob/3a9d0b52459877ee866a9a0ba06e60059b778c77/LICENSE.txt"
= "9d0928b3cc21ee5e1f2868f692421165f46b5014a901636c2a2b32a4c500f761"
= "2b11f8fc5b6260ebf00bde83585cd7469709a4979ca579cdf065724bc15052fc"
= 75
= 80
= "STORMBAMBOO, FILE, MEMORY"
= "all"
= "all"
= "file,memory"
= "critical"
= "See license at https://github.com/volexity/threat-intel/blob/main/LICENSE.txt"
= 10282
= 4
strings:
$man1 = "Reload page with Internet Explorer compatible mode."
$man2 = "\"http://*/*\""
$code1 = ";chrome["
$code2 = "XMLHttpRequest(),_"
$code3 = "0x400*0x400"
condition:
all of ( $man* ) or ( #code1 > 8 and #code2 >= 2 and #code3 >= 2 )
}
Strings (5 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $man1 | text | "Reload page with Internet Explorer compatible mode." | |
| $man2 | text | "\"http://*/*\"" | |
| $code1 | text | ";chrome[" | |
| $code2 | text | "XMLHttpRequest(),_" | |
| $code3 | text | "0x400*0x400" |
Condition
all of ( $man* ) or ( #code1 > 8 and #code2 >= 2 and #code3 >= 2 )In plain words (Heuristic)
- All patterns in ( $man* ) must match.
- Pattern $code1 must occur > 8 times.
- Pattern $code2 must occur >= 2 times.
- Pattern $code3 must occur >= 2 times.
Test this rule in your browser
Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.
Sample hashes
Hashes of samples the author lists in the rule's meta (look them up in your threat-intelligence platform).
- 9d0928b3cc21ee5e1f2868f692421165f46b5014a901636c2a2b32a4c500f761
Licence & attribution
Author: threatintel@volexity.com
Source repository: Volexity threat-intel @ 3a9d0b5245
Licence: BSD 2-Clause License (stated in the rule's own meta)
“See license at https://github.com/volexity/threat-intel/blob/main/LICENSE.txt”
Copyright notice: Copyright 2022 by Volexity, Inc.
Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.
Rule id: 6c6c8bee-2a13-5645-89ef-779f00264fd9
Metadata
| os | all |
|---|---|
| os_arch | all |
| scan_context | file,memory |
| severity | critical |
| rule_id | 10282 |
| version | 4 |
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