67ac1d2751e9a8c397cbe16b147a86d6d4b09abfe08e905bd622585ea67203e3

Analysis

max time kernel
118s
max time network
119s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
07-05-2024 11:21

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General

Target

script.a3x
Size

497KB
MD5

e6dcf390f0861b103a8331222dbb29fd
SHA1

d2518370574b20bcc2dd457e71d129889f7fc98f
SHA256

42b6480c1547bf3867d63dcfec7d5d301d770ce45f82931d922d22def3942d6b
SHA512

ceb792c6a9cca9edcf3066bff6cae493a9da8b48581030bda87388e2e8c5d18d7dcdf019f2d0fb62c706c4494b117ed27ce8ac02b24fb24fab5802fa4fd0bb1c
SSDEEP

12288:5yiV4v4gtXzPYQzBBF3e2gzGp+dKmhn0zKx0PK9gbm5c3yloDrJA3fLVp:skEX7YAzFu2gGpsn0zSp

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-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\.a3x\ = "a3x_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\a3x_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\a3x_auto_file\shell\Read\command	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_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-1-5-21-3627615824-4061627003-3019543961-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\a3x_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\a3x_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\.a3x	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\a3x_auto_file\shell	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

AcroRd32.exe

pid process

2568 AcroRd32.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

AcroRd32.exe

pid process

2568 AcroRd32.exe
2568 AcroRd32.exe

pid	process
2568	AcroRd32.exe

pid	process
2568	AcroRd32.exe
2568	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

cmd.exerundll32.exe

description	pid	process	target process
PID 1712 wrote to memory of 1732	1712	cmd.exe	rundll32.exe
PID 1712 wrote to memory of 1732	1712	cmd.exe	rundll32.exe
PID 1712 wrote to memory of 1732	1712	cmd.exe	rundll32.exe
PID 1732 wrote to memory of 2568	1732	rundll32.exe	AcroRd32.exe
PID 1732 wrote to memory of 2568	1732	rundll32.exe	AcroRd32.exe
PID 1732 wrote to memory of 2568	1732	rundll32.exe	AcroRd32.exe
PID 1732 wrote to memory of 2568	1732	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:1712

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:1732

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:2568

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
83377272fb6852cf282b9888ca6543eb

SHA1
1566dd47adfd13fe8e84f74493e0df7f25213dbe

SHA256
b37bb8f678505f8b96a240e996773dfc8a89eb7a91211819ba2a322ec86091b0

SHA512
e9f7670552c1f17625931bf3aa3ce51285a9c3f6aa12f8ec97329f9ca1119142cd7180e39fd91e4d3cb019a9b510bf6d344c0c862b921b0cfd7cd01248e51410

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