58e8cf2a77663a1ff5cc36aa9e0777ce952eaa258c9b8220cadb5a53bed89724

Analysis

max time kernel
151s
max time network
33s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
05-02-2023 11:45

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General

Target

encodings/ascii.pyc
Size

1KB
MD5

5b9186df4a5ad6247c4579654fbc3a0f
SHA1

8df3c98c1b9245cf725d4cfda4d4b5eff02befb4
SHA256

a260af800dd9a77a6fb7dccbff41cc6922f21f7f955045b52d99659246935d5d
SHA512

aa051f09acd8ef07cf0e0471faf257ad84ce0d04c07ef6f0f313c09516ea93ddc18c9405b78908a86c6a3f31fa39e528af8308ccccea6bf7e4ec701e818bbfb4

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-1-5-21-1214520366-621468234-4062160515-1000_CLASSES\pyc_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000_CLASSES\pyc_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000_CLASSES\pyc_auto_file\shell	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000_CLASSES\pyc_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\pyc_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000_CLASSES\pyc_auto_file\shell\Read\command	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\Local Settings\Software\Microsoft\Windows\Shell\MuiCache	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000_CLASSES\.pyc	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000_CLASSES\.pyc\ = "pyc_auto_file"	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

AcroRd32.exe

pid process

1956 AcroRd32.exe
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

AcroRd32.exe

pid process

1956 AcroRd32.exe
1956 AcroRd32.exe
1956 AcroRd32.exe

pid	process
1956	AcroRd32.exe

pid	process
1956	AcroRd32.exe
1956	AcroRd32.exe
1956	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

cmd.exerundll32.exe

description	pid	process	target process
PID 1536 wrote to memory of 1764	1536	cmd.exe	rundll32.exe
PID 1536 wrote to memory of 1764	1536	cmd.exe	rundll32.exe
PID 1536 wrote to memory of 1764	1536	cmd.exe	rundll32.exe
PID 1764 wrote to memory of 1956	1764	rundll32.exe	AcroRd32.exe
PID 1764 wrote to memory of 1956	1764	rundll32.exe	AcroRd32.exe
PID 1764 wrote to memory of 1956	1764	rundll32.exe	AcroRd32.exe
PID 1764 wrote to memory of 1956	1764	rundll32.exe	AcroRd32.exe

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\encodings\ascii.pyc
1⤵
- Suspicious use of WriteProcessMemory
PID:1536

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\encodings\ascii.pyc
2⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1764

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\encodings\ascii.pyc"
3⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
PID:1956

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/1536-54-0x000007FEFC251000-0x000007FEFC253000-memory.dmp

Filesize
8KB

Download
memory/1764-76-0x0000000000000000-mapping.dmp

Download
memory/1956-81-0x0000000000000000-mapping.dmp

Download
memory/1956-82-0x0000000076581000-0x0000000076583000-memory.dmp

Filesize
8KB

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