a5496136da38e8eded7218c65d527bb93ad417c4088183baec894891d7965b4c

Resubmissions

08-05-2024 20:55

240508-zqst1afb3v 3

08-05-2024 20:51

240508-znfrnaeh9z 3

Analysis

max time kernel
117s
max time network
118s
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

c.a3x
Size

23KB
MD5

371b4cd3356e67320cbbad4537f5b6b4
SHA1

4b5b7cf403ac7d6e3dd787104e3e6bd088743815
SHA256

690ada1acafbbffbb68f52e981ef1d98cbb781627dfa7b3d5653aba2feaf5d79
SHA512

8beac98f2de82eb97fcd3d02d017f0e1639756135c7e022bd826d5c0ff637cdc9b77301140296f9f2664fe2b809c34df30cac40066eacefc6398147579d0774e
SSDEEP

384:M+/cBozUqKi8DsHqjFnKNSTYY0Rez/5QLkWN6vXiAq+7UYaiaeOaIfxVh+bJ/jI7:d/vUqKFsKw0h1QL7Qvy8UYP6aIfxVgb2

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-1-5-21-3452737119-3959686427-228443150-1000_CLASSES\.a3x\ = "a3x_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3452737119-3959686427-228443150-1000_CLASSES\a3x_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3452737119-3959686427-228443150-1000_CLASSES\a3x_auto_file\shell\Read\command	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3452737119-3959686427-228443150-1000_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-1-5-21-3452737119-3959686427-228443150-1000_Classes\Local Settings	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3452737119-3959686427-228443150-1000_CLASSES\a3x_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3452737119-3959686427-228443150-1000_CLASSES\.a3x	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3452737119-3959686427-228443150-1000_CLASSES\a3x_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3452737119-3959686427-228443150-1000_CLASSES\a3x_auto_file	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

AcroRd32.exe

pid process

2548 AcroRd32.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

AcroRd32.exe

pid process

2548 AcroRd32.exe
2548 AcroRd32.exe

pid	process
2548	AcroRd32.exe

pid	process
2548	AcroRd32.exe
2548	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

cmd.exerundll32.exe

description	pid	process	target process
PID 2316 wrote to memory of 2988	2316	cmd.exe	rundll32.exe
PID 2316 wrote to memory of 2988	2316	cmd.exe	rundll32.exe
PID 2316 wrote to memory of 2988	2316	cmd.exe	rundll32.exe
PID 2988 wrote to memory of 2548	2988	rundll32.exe	AcroRd32.exe
PID 2988 wrote to memory of 2548	2988	rundll32.exe	AcroRd32.exe
PID 2988 wrote to memory of 2548	2988	rundll32.exe	AcroRd32.exe
PID 2988 wrote to memory of 2548	2988	rundll32.exe	AcroRd32.exe

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\c.a3x
1⤵
- Suspicious use of WriteProcessMemory
PID:2316

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\c.a3x
2⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2988

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\c.a3x"
3⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
PID:2548

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
15239e81cc2ea6f306cd91433ced4cf5

SHA1
7a83285b1ea855f58f44e3980bb9a8a66f5f5253

SHA256
cce6bd27e3a9320488f5d682f7043e526dab16f96a518595c0f7630285f66033

SHA512
0fa9b4455187908c35853d71d40f4c5c77b0cb778f19709391c9822cc64f67ad1f05f87a3a99c32f583f7f17c8279ad18a2487958f06d3bad5a85df050889b13

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