31475717735f9aee20def2a4044b42a52cb92e8cf885b92a042099a273688135

Analysis

max time kernel
299s
max time network
34s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
26-03-2023 04:40

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General

Target

plugin_biff.py
Size

139KB
MD5

d74fe593741147c60e2a3f7685a3699a
SHA1

9a71d64062338971655e45f06a1dff5a4d599811
SHA256

2031e6a7001c44532cbda669fed36218ceafd2bcc9c2f1458caf21a6e7b08547
SHA512

76e6d4c412192799ac877fc1d3f5adb3f5c074bbce1a0e99c1abd567a0961b6bad6fc123cc1ee08dfba62b7a72c923db5221e05bf9d1c27e2c05c52a73378b52
SSDEEP

1536:/LTuVCzjRet7e1/cX9p9v3BevapX4Rb7bm82lYRQQ8EotT68PllHGLoqDX1qHsG2:/zu9yb7bazjG0qD4K5q6pJwA2K

Score

3^/10

Malware Config

Signatures

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Modifies registry class 10 IoCs

Processes:

rundll32.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000_CLASSES\py_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000_CLASSES\py_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\MuiCache	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000_CLASSES\py_auto_file	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000_CLASSES\py_auto_file\shell\Read\command	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000_CLASSES\py_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000_CLASSES\.py	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000_CLASSES\.py\ = "py_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000_CLASSES\py_auto_file\shell	rundll32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

AcroRd32.exe

pid process

1156 AcroRd32.exe
1156 AcroRd32.exe
1156 AcroRd32.exe

pid	process
1156	AcroRd32.exe
1156	AcroRd32.exe
1156	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

cmd.exerundll32.exe

description	pid	process	target process
PID 1104 wrote to memory of 1920	1104	cmd.exe	rundll32.exe
PID 1104 wrote to memory of 1920	1104	cmd.exe	rundll32.exe
PID 1104 wrote to memory of 1920	1104	cmd.exe	rundll32.exe
PID 1920 wrote to memory of 1156	1920	rundll32.exe	AcroRd32.exe
PID 1920 wrote to memory of 1156	1920	rundll32.exe	AcroRd32.exe
PID 1920 wrote to memory of 1156	1920	rundll32.exe	AcroRd32.exe
PID 1920 wrote to memory of 1156	1920	rundll32.exe	AcroRd32.exe

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\plugin_biff.py
1⤵
- Suspicious use of WriteProcessMemory
PID:1104

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\plugin_biff.py
2⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1920

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\plugin_biff.py"
3⤵
- Suspicious use of SetWindowsHookEx
PID:1156

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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