ca2b787bb72f0bd9d79013aa93800bfd84c73aad74662c48e69425e4adfb549b

Analysis

max time kernel
120s
max time network
121s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
12-06-2024 06:44

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General

Target

rhombohedron.ai
Size

59KB
MD5

674dfd74a1bef081bf0da83f893138e5
SHA1

2a254cc02fea4c55bbc3133b99a9e2fd03082ae7
SHA256

67ff95298e395543ea0c9eeec6bfff81688df379bec578aa31c52d214b385180
SHA512

0b2bfbe287a037d46d881a00638a3c272197cf3537bc74169c07c7721cda2bf94927268bfd6cb965ad56e1ac98e3466d809cbc67f2e4d971dd0d7da9568a4cce
SSDEEP

768:mw3MXcFaDu4TOhFy3e+BYNuBBwsVMOTeKL7WSX2VZ4kEIs18Ai9my:tkgaDXOhFm/YGBwi57DEdV9my

Score

3^/10

Malware Config

Signatures

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies registry class 9 IoCs

Processes:

rundll32.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\ai_auto_file\	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\.ai\ = "ai_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\ai_auto_file\shell	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\ai_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\ai_auto_file	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\.ai	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\ai_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\ai_auto_file\shell\Read\command	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

AcroRd32.exe

pid process

2776 AcroRd32.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

AcroRd32.exe

pid process

2776 AcroRd32.exe
2776 AcroRd32.exe

pid	process
2776	AcroRd32.exe

pid	process
2776	AcroRd32.exe
2776	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

cmd.exerundll32.exe

description	pid	process	target process
PID 1924 wrote to memory of 2616	1924	cmd.exe	rundll32.exe
PID 1924 wrote to memory of 2616	1924	cmd.exe	rundll32.exe
PID 1924 wrote to memory of 2616	1924	cmd.exe	rundll32.exe
PID 2616 wrote to memory of 2776	2616	rundll32.exe	AcroRd32.exe
PID 2616 wrote to memory of 2776	2616	rundll32.exe	AcroRd32.exe
PID 2616 wrote to memory of 2776	2616	rundll32.exe	AcroRd32.exe
PID 2616 wrote to memory of 2776	2616	rundll32.exe	AcroRd32.exe

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\rhombohedron.ai
1⤵
- Suspicious use of WriteProcessMemory
PID:1924

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\rhombohedron.ai
2⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2616

C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe
"C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe" "C:\Users\Admin\AppData\Local\Temp\rhombohedron.ai"
3⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
PID:2776

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Adobe\Acrobat\9.0\SharedDataEvents
Filesize
3KB

MD5
4d944bda86d1726bf675e0d0212423c5

SHA1
b3168b93061e7e4a812403b65ab673afbc3cb7d7

SHA256
2103d883f689145867b3e8c8315e74023bcd2a0c4e6f9390e0c5a65b471144d0

SHA512
c2426244cbd0ae30b29c1b50e09386b5ee879b29fed0e2ac44dd686456d22ba2ba39ed3ab81619d3efa00e4aebc4d6915bacb2ee466ec12fe18035c666ca68ad

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