a5496136da38e8eded7218c65d527bb93ad417c4088183baec894891d7965b4c

Resubmissions

08-05-2024 20:55

240508-zqst1afb3v 3

08-05-2024 20:51

240508-znfrnaeh9z 3

Analysis

max time kernel
122s
max time network
125s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
08-05-2024 20:51

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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-1-5-21-2248906074-2862704502-246302768-1000_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-1-5-21-2248906074-2862704502-246302768-1000_CLASSES\a3x_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2248906074-2862704502-246302768-1000_CLASSES\a3x_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2248906074-2862704502-246302768-1000_CLASSES\.a3x	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2248906074-2862704502-246302768-1000_CLASSES\.a3x\ = "a3x_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2248906074-2862704502-246302768-1000_CLASSES\a3x_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2248906074-2862704502-246302768-1000_CLASSES\a3x_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2248906074-2862704502-246302768-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2248906074-2862704502-246302768-1000_CLASSES\a3x_auto_file\shell\Read\command	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

AcroRd32.exe

pid process

2640 AcroRd32.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

AcroRd32.exe

pid process

2640 AcroRd32.exe
2640 AcroRd32.exe

pid	process
2640	AcroRd32.exe

pid	process
2640	AcroRd32.exe
2640	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

cmd.exerundll32.exe

description	pid	process	target process
PID 2220 wrote to memory of 2528	2220	cmd.exe	rundll32.exe
PID 2220 wrote to memory of 2528	2220	cmd.exe	rundll32.exe
PID 2220 wrote to memory of 2528	2220	cmd.exe	rundll32.exe
PID 2528 wrote to memory of 2640	2528	rundll32.exe	AcroRd32.exe
PID 2528 wrote to memory of 2640	2528	rundll32.exe	AcroRd32.exe
PID 2528 wrote to memory of 2640	2528	rundll32.exe	AcroRd32.exe
PID 2528 wrote to memory of 2640	2528	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:2220

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:2528

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:2640

Network

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
62f4a98c0ba377e9f91b7e44828a505f

SHA1
e2f7d8084b5203d488ecc8089decdff8e65c967c

SHA256
0910a658399635ad6efd3364b11accd8f49b95b3eaf4cf3ea6e5342d516b198f

SHA512
0224aab0c870ad1f5e76f4733fefd94df110384a4ec14988fa9022d4114f43d1e3e96f0a12951753a70edb981d0079cb640d0af95c2ff93154b9ec5a16322d50

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