a5496136da38e8eded7218c65d527bb93ad417c4088183baec894891d7965b4c

Resubmissions

08-05-2024 20:55

240508-zqst1afb3v 3

08-05-2024 20:51

240508-znfrnaeh9z 3

Analysis

max time kernel
121s
max time network
125s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
08-05-2024 20:55

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General

Target

b.a3x
Size

23KB
MD5

798143857b58ea9146d2e58b5f21c25e
SHA1

2bd4acea5c3bf107cc6615af65d1617c847814cc
SHA256

c3d85c05121900c93f667ff65073ef331d37e65eea9bd4c60252dba9764056a3
SHA512

446cedc6dcd277ee542d157f7f5a4c0f305a6aceb317ad518c6d6f15843cd525c1e52502330de494664a868f5904db164a0570bb3ff756b5e8b059a32c379b08
SSDEEP

384:M3//cBozUqKi8DsHqjFnKNSTYY0Rez/5QLkWN6vXiAq+7UYaiaeOaIfxVh+bJ/jd:U//vUqKFsKw0h1QL7Qvy8UYP6aIfxVgP

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
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000_CLASSES\a3x_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000_CLASSES\a3x_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000_CLASSES\.a3x	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000_CLASSES\.a3x\ = "a3x_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000_CLASSES\a3x_auto_file\shell\Read	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000_CLASSES\a3x_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000_CLASSES\a3x_auto_file\shell\Read\command	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000_CLASSES\a3x_auto_file\shell	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

AcroRd32.exe

pid process

2112 AcroRd32.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

AcroRd32.exe

pid process

2112 AcroRd32.exe
2112 AcroRd32.exe

pid	process
2112	AcroRd32.exe

pid	process
2112	AcroRd32.exe
2112	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

cmd.exerundll32.exe

description	pid	process	target process
PID 1908 wrote to memory of 2616	1908	cmd.exe	rundll32.exe
PID 1908 wrote to memory of 2616	1908	cmd.exe	rundll32.exe
PID 1908 wrote to memory of 2616	1908	cmd.exe	rundll32.exe
PID 2616 wrote to memory of 2112	2616	rundll32.exe	AcroRd32.exe
PID 2616 wrote to memory of 2112	2616	rundll32.exe	AcroRd32.exe
PID 2616 wrote to memory of 2112	2616	rundll32.exe	AcroRd32.exe
PID 2616 wrote to memory of 2112	2616	rundll32.exe	AcroRd32.exe

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\b.a3x
1⤵
- Suspicious use of WriteProcessMemory
PID:1908

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\b.a3x
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\b.a3x"
3⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
PID:2112

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

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

MD5
3dd401b4c440ee2c2f8283db790e0d5b

SHA1
acc925ed797b04e182951615c8ed0569720d048b

SHA256
5488cfaf4c36e4f773e6f0caa02f6e0592d0861edeee99a2f82ea19def23b3bf

SHA512
a76051c911d609cf5671e9667be691b6425b720eff4ab86a0b5957e036ef8ef9d4a55c70829b67c858bb659b58c701c278f712a85d78b3993532569518781eb6

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