8b47e773a782361209f8adacc8d6aeefb595e1c13ae6813df7de01c20a15c91e

Analysis

max time kernel
150s
max time network
33s
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/Song/midi2bin.py
Size

600B
MD5

f61a4c22e580ac463d75a30e9fa964c3
SHA1

fecbc581f823dcb0b113c5c9f58bfcb04ab92884
SHA256

aaefe013bfc0d079de26a6ec0722d0d28c30aa849100f95e447bdda0044bb641
SHA512

2afdc98c7d0853b36b151e3fbb80983a812d1d22478ee4ea6390c3a11180b80dfa89321430ecadf6a7d1e22d4722e5700b337a6527d5291d449b541b93f1ad05

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-1-5-21-3385717845-2518323428-350143044-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\MuiCache	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000_CLASSES\.py\ = "py_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000_CLASSES\py_auto_file\shell	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000_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-1-5-21-3385717845-2518323428-350143044-1000_CLASSES\py_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000_CLASSES\py_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000_CLASSES\.py	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000_CLASSES\py_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000_CLASSES\py_auto_file\shell\Read\command	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1200	AcroRd32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1200	AcroRd32.exe
1200	AcroRd32.exe
1200	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 940 wrote to memory of 564	940	cmd.exe	29
PID 940 wrote to memory of 564	940	cmd.exe	29
PID 940 wrote to memory of 564	940	cmd.exe	29
PID 564 wrote to memory of 1200	564	rundll32.exe	30
PID 564 wrote to memory of 1200	564	rundll32.exe	30
PID 564 wrote to memory of 1200	564	rundll32.exe	30
PID 564 wrote to memory of 1200	564	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\MEMZ-master\NyanMBR\Data\Song\midi2bin.py
1⤵
- Suspicious use of WriteProcessMemory
PID:940
- 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\Song\midi2bin.py
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:564
- - 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\Song\midi2bin.py"
    3⤵
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:1200

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/940-54-0x000007FEFC4E1000-0x000007FEFC4E3000-memory.dmp

Filesize
8KB

Download
memory/1200-82-0x0000000076411000-0x0000000076413000-memory.dmp

Filesize
8KB

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