8b47e773a782361209f8adacc8d6aeefb595e1c13ae6813df7de01c20a15c91e

Analysis

max time kernel
30s
max time network
34s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
08-02-2023 15:39

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General

Target

MEMZ-master/NyanMBR/Data/Image/png2bin.py
Size

1KB
MD5

6d6d94f38626dd058abc46f146cb7688
SHA1

cf726d65e5946f1767c57a8861c9636cc7dccbbd
SHA256

400047a3ebd0fd331a6049bb6d44bce3479a4f4a6c1fad120defc2426a3556f9
SHA512

a184a26df513bc5ca215bc2084ad660eb94ff4a0dcf916e15477442e199999b25b05ea97c3ccb7d07812ecb8ac682054b99b6dbc204e1745a65d1150a18d695f

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

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\MuiCache	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000_CLASSES\py_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000_CLASSES\py_auto_file\	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000_CLASSES\.py\ = "py_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000_CLASSES\py_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000_CLASSES\py_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000_CLASSES\py_auto_file\shell\Read\command	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000_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-1-5-21-1214520366-621468234-4062160515-1000_CLASSES\.py	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
604	AcroRd32.exe
604	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1312 wrote to memory of 1488	1312	cmd.exe	29
PID 1312 wrote to memory of 1488	1312	cmd.exe	29
PID 1312 wrote to memory of 1488	1312	cmd.exe	29
PID 1488 wrote to memory of 604	1488	rundll32.exe	30
PID 1488 wrote to memory of 604	1488	rundll32.exe	30
PID 1488 wrote to memory of 604	1488	rundll32.exe	30
PID 1488 wrote to memory of 604	1488	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\MEMZ-master\NyanMBR\Data\Image\png2bin.py
1⤵
- Suspicious use of WriteProcessMemory
PID:1312
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\MEMZ-master\NyanMBR\Data\Image\png2bin.py
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:1488
- - 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\MEMZ-master\NyanMBR\Data\Image\png2bin.py"
    3⤵
    - Suspicious use of SetWindowsHookEx
    PID:604

Network

MITRE ATT&CK Enterprise v6

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

memory/604-82-0x0000000075551000-0x0000000075553000-memory.dmp

Filesize
8KB

Download
memory/1312-54-0x000007FEFBB31000-0x000007FEFBB33000-memory.dmp

Filesize
8KB

Download