bef59b9a3e00a14956e0cd4a1f3e7524448cbe5d3cc1295d95a15b83a3579c59

Analysis

max time kernel
120s
max time network
121s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
03/05/2024, 04:30

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General

Target

atexit.pyc
Size

2KB
MD5

caa17cef8d6e755171be18e173e88f17
SHA1

a2f2cdf49baf0c968bee15e1b4bb8ec236e69a33
SHA256

b219adb21a4c64642433653d2608ea05a824aea46ddc5a46cf605b9dffb0a450
SHA512

235334ff156ff9e0112fbb5205fa4f2485186d87f843eb545076793ffcdbaa480218fc1ac926ee4120cb79a7539bb590a198995a85ad5e3c3242132d5781b443

Score

3^/10

Malware Config

Signatures

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies registry class 9 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\pyc_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\pyc_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_Classes\Local Settings	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\pyc_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\.pyc	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\.pyc\ = "pyc_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\pyc_auto_file	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\pyc_auto_file\shell\Read\command	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\pyc_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2484	AcroRd32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2484	AcroRd32.exe
2484	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1040 wrote to memory of 2636	1040	cmd.exe	29
PID 1040 wrote to memory of 2636	1040	cmd.exe	29
PID 1040 wrote to memory of 2636	1040	cmd.exe	29
PID 2636 wrote to memory of 2484	2636	rundll32.exe	30
PID 2636 wrote to memory of 2484	2636	rundll32.exe	30
PID 2636 wrote to memory of 2484	2636	rundll32.exe	30
PID 2636 wrote to memory of 2484	2636	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\atexit.pyc
1⤵
- Suspicious use of WriteProcessMemory
PID:1040
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\atexit.pyc
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2636
- - 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\atexit.pyc"
    3⤵
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:2484

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Adobe\Acrobat\9.0\SharedDataEvents

Filesize
3KB

MD5
6be15b4947a4d5e8222156fe8fabe3f1

SHA1
e060d6c4c077c4f544e788fdc7554372ddfeacb9

SHA256
399153323e8cbf17930f312fb12ab3895253331b70ac1a611deac0f6239d23cc

SHA512
88cee83561f6732906a259e50d49483d5862343f220930712d2cda705e206787e72d761f67631b028acfe0841af207686dbd252f965b889a0b1c8a12d45039e7

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