78769e4085312f21cc67e77bfdd136f9a30d34e2d2a5d8870f2ebbeb7c3a8f7e

Analysis

max time kernel
152s
max time network
49s
platform
windows7_x64
resource
win7-20220414-en
submitted
21-05-2022 11:11

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General

Target

malware-analysis-writeups-master/ava-maria-rat/helperScripts/buerCatchBeacons.py
Size

1KB
MD5

51c4fb6391c69d9209bdf88e0f2429a2
SHA1

1c80ecb110c80aa58561d76cb5a1270047946b83
SHA256

9711da2ae75449e7faacc5756620458892cbdceecbc140f3898c44b76921abca
SHA512

7ece78d908cd1981104619d4f40509475b7794dd87e479f3748bc4a6aa860cdd8ee6ec12b8c5a910e35decd86f1215788d1bf4c524c7b953daefab8381902740

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
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\MuiCache	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000_CLASSES\.py	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000_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-1-5-21-2277218442-1199762539-2004043321-1000_CLASSES\py_auto_file\shell\Read\command	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000_CLASSES\py_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000_CLASSES\py_auto_file\	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000_CLASSES\.py\ = "py_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000_CLASSES\py_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000_CLASSES\py_auto_file\shell	rundll32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

AcroRd32.exe

pid process

468 AcroRd32.exe
468 AcroRd32.exe
468 AcroRd32.exe

pid	process
468	AcroRd32.exe
468	AcroRd32.exe
468	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

cmd.exerundll32.exe

description	pid	process	target process
PID 892 wrote to memory of 1964	892	cmd.exe	rundll32.exe
PID 892 wrote to memory of 1964	892	cmd.exe	rundll32.exe
PID 892 wrote to memory of 1964	892	cmd.exe	rundll32.exe
PID 1964 wrote to memory of 468	1964	rundll32.exe	AcroRd32.exe
PID 1964 wrote to memory of 468	1964	rundll32.exe	AcroRd32.exe
PID 1964 wrote to memory of 468	1964	rundll32.exe	AcroRd32.exe
PID 1964 wrote to memory of 468	1964	rundll32.exe	AcroRd32.exe

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\malware-analysis-writeups-master\ava-maria-rat\helperScripts\buerCatchBeacons.py
1⤵
- Suspicious use of WriteProcessMemory
PID:892

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\malware-analysis-writeups-master\ava-maria-rat\helperScripts\buerCatchBeacons.py
2⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1964

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\malware-analysis-writeups-master\ava-maria-rat\helperScripts\buerCatchBeacons.py"
3⤵
- Suspicious use of SetWindowsHookEx
PID:468

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

Replay Monitor

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Downloads

memory/468-81-0x0000000000000000-mapping.dmp

Download
memory/468-82-0x0000000075801000-0x0000000075803000-memory.dmp

Filesize
8KB

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memory/892-54-0x000007FEFBF11000-0x000007FEFBF13000-memory.dmp

Filesize
8KB

Download
memory/1964-76-0x0000000000000000-mapping.dmp

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