98084e47a6945d721f44d235fe2789bd99ab3cf9026d4f20064b1919bc9af1b1

Analysis

max time kernel
120s
max time network
120s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
29-05-2024 14:13

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General

Target

script.a3x
Size

547KB
MD5

77fd989ebd6cfc7b75b36474503c1ad6
SHA1

2cf50b3b481900635ffe63735bacdefacae8e85c
SHA256

b4accf076121e1074fa593d9a3c6925c59616c3e7abcbe524a3cec6fd36b682f
SHA512

58ef7e74c5d702177963b6d608ac0a7bcb5a661b7ca6e4925e961cfa41b1b1584155f6afffa77c576ca94d8c579336157072c296595fc1d8a92bb7a59d230f9e
SSDEEP

6144:Ec7e/xuonLIsVBJ/U3urrvp1USrqErn3WxfZxZ7Pd47myhja86XVvwB:vS0onl2I7PrqETWxF7ymkjanvU

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-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\a3x_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\a3x_auto_file\shell\Read\command	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\a3x_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\a3x_auto_file\	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_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-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\.a3x	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\.a3x\ = "a3x_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\a3x_auto_file\shell\Read	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

AcroRd32.exe

pid process

2540 AcroRd32.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

AcroRd32.exe

pid process

2540 AcroRd32.exe
2540 AcroRd32.exe

pid	process
2540	AcroRd32.exe

pid	process
2540	AcroRd32.exe
2540	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

cmd.exerundll32.exe

description	pid	process	target process
PID 3040 wrote to memory of 2532	3040	cmd.exe	rundll32.exe
PID 3040 wrote to memory of 2532	3040	cmd.exe	rundll32.exe
PID 3040 wrote to memory of 2532	3040	cmd.exe	rundll32.exe
PID 2532 wrote to memory of 2540	2532	rundll32.exe	AcroRd32.exe
PID 2532 wrote to memory of 2540	2532	rundll32.exe	AcroRd32.exe
PID 2532 wrote to memory of 2540	2532	rundll32.exe	AcroRd32.exe
PID 2532 wrote to memory of 2540	2532	rundll32.exe	AcroRd32.exe

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\script.a3x
1⤵
- Suspicious use of WriteProcessMemory
PID:3040

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\script.a3x
2⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2532

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\script.a3x"
3⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
PID:2540

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
446fd3818110003aee74996e3381d590

SHA1
6f80c13337c412f315b2b21ecb6e0a6c17c87139

SHA256
16cf32395c0ffa60ad6291270680e63938de272d3c6d072cbccdddf301fd988a

SHA512
8f570f2dbdfa68be3d79afcac86184b7e060c481e8ceff4d27636f30cae560fe86cb25b99415cb99cdc167945b2ab027f9863779101704b3f9d84cdfc626b378

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