58e8cf2a77663a1ff5cc36aa9e0777ce952eaa258c9b8220cadb5a53bed89724

Analysis

max time kernel
151s
max time network
31s
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

codecs.pyc
Size

32KB
MD5

71916e473c37d5f5ff7855469fee7459
SHA1

80884a21fe0d8c88c7f5760c77c10da857dd368f
SHA256

faedd628eafc0b549dec66e49f42ea003eb8d40a9682c59aa0790198d73f1fff
SHA512

77de6c5d4578e8411095162b99985e3a2e0b7f1d084418a06a34843a98f6ba9be4c17df9af39fda3f39ef67f324509c3e158eb5e06224bac0c3113c593eebfd3
SSDEEP

768:7U/N41w3bo0YqcZCYEg7oUroGXmSKLZxEKfE0b1Th8Z:7BPs+XKLZxNfE0b1TmZ

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\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\Local Settings\Software\Microsoft\Windows\Shell\MuiCache	rundll32.exe
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\ = "pyc_auto_file"	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
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	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

AcroRd32.exe

pid process

1504 AcroRd32.exe
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

AcroRd32.exe

pid process

1504 AcroRd32.exe
1504 AcroRd32.exe
1504 AcroRd32.exe

pid	process
1504	AcroRd32.exe

pid	process
1504	AcroRd32.exe
1504	AcroRd32.exe
1504	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

cmd.exerundll32.exe

description	pid	process	target process
PID 1296 wrote to memory of 1044	1296	cmd.exe	rundll32.exe
PID 1296 wrote to memory of 1044	1296	cmd.exe	rundll32.exe
PID 1296 wrote to memory of 1044	1296	cmd.exe	rundll32.exe
PID 1044 wrote to memory of 1504	1044	rundll32.exe	AcroRd32.exe
PID 1044 wrote to memory of 1504	1044	rundll32.exe	AcroRd32.exe
PID 1044 wrote to memory of 1504	1044	rundll32.exe	AcroRd32.exe
PID 1044 wrote to memory of 1504	1044	rundll32.exe	AcroRd32.exe

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\codecs.pyc
1⤵
- Suspicious use of WriteProcessMemory
PID:1296

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\codecs.pyc
2⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1044

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\codecs.pyc"
3⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
PID:1504

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/1044-76-0x0000000000000000-mapping.dmp

Download
memory/1296-54-0x000007FEFBCE1000-0x000007FEFBCE3000-memory.dmp

Filesize
8KB

Download
memory/1504-81-0x0000000000000000-mapping.dmp

Download
memory/1504-82-0x0000000075531000-0x0000000075533000-memory.dmp

Filesize
8KB

Download