31475717735f9aee20def2a4044b42a52cb92e8cf885b92a042099a273688135

Analysis

max time kernel
300s
max time network
33s
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

tools/reextra.pyc
Size

51KB
MD5

26d816e7a66a9b755be98977fd7ec94f
SHA1

51fdd52e8a74b85474655673c933d1486369f0c2
SHA256

d824866160ef3e11c75e798ac67e6321f8904dfb8b7b13f1271dfafd4b1e9c26
SHA512

0528a624b7bf595f26c5e6ad6b22709088a378f3e831bce0ae1619dfe9b0733f26f5cebed00613605357610ecd51046af8a9c83e43e8493247b5197e7c645f2d
SSDEEP

1536:wDWEbOQgsZwoSlKyxcQQkQrqws4PBV4al/x85e77mr:nElZLAKicCAqbUxse7Cr

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 9 IoCs

Processes:

rundll32.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000_CLASSES\pyc_auto_file\shell\Read\command	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000_CLASSES\pyc_auto_file	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000_CLASSES\.pyc	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000_CLASSES\.pyc\ = "pyc_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000_CLASSES\pyc_auto_file\shell\Read	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000_CLASSES\pyc_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000_CLASSES\pyc_auto_file\shell	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000_CLASSES\pyc_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

AcroRd32.exe

pid process

1168 AcroRd32.exe
1168 AcroRd32.exe
1168 AcroRd32.exe

pid	process
1168	AcroRd32.exe
1168	AcroRd32.exe
1168	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

cmd.exerundll32.exe

description	pid	process	target process
PID 1376 wrote to memory of 1880	1376	cmd.exe	rundll32.exe
PID 1376 wrote to memory of 1880	1376	cmd.exe	rundll32.exe
PID 1376 wrote to memory of 1880	1376	cmd.exe	rundll32.exe
PID 1880 wrote to memory of 1168	1880	rundll32.exe	AcroRd32.exe
PID 1880 wrote to memory of 1168	1880	rundll32.exe	AcroRd32.exe
PID 1880 wrote to memory of 1168	1880	rundll32.exe	AcroRd32.exe
PID 1880 wrote to memory of 1168	1880	rundll32.exe	AcroRd32.exe

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\tools\reextra.pyc
1⤵
- Suspicious use of WriteProcessMemory
PID:1376

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\tools\reextra.pyc
2⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1880

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\tools\reextra.pyc"
3⤵
- Suspicious use of SetWindowsHookEx
PID:1168

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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