71ddfacd8ba48806396c95b279237998945cf8124875728f92d8a9d0489cddd2

Analysis

max time kernel
150s
max time network
126s
platform
windows7_x64
resource
win7-20231020-en
resource tags

arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
submitted
09-11-2023 22:02

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General

Target

_weakrefset.pyc
Size

11KB
MD5

685d4aaf13a4f2bb43bec6340f853fa2
SHA1

2cbbad3829a7ecb101e1fe58e34b8651bc153389
SHA256

ac2dfa51d2edb55548f68ac15279b9e09944dda301478e2bb533e7948ed6187c
SHA512

76dcca6e3b7f93155bdbac2f5f94878b710de381c5732e64ef6432f7d709d111640868ea37d70400c4805cbf65289d18a88885f446cb7a25c110cecfa652b4d2
SSDEEP

192:s+2JxBMBSmGt2ob/rxBZ9qpa/awsHXqe11ZFKFbnaJ6My:Pofm5ojd9H/gHaoZQbgXy

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
Set value (str)	\REGISTRY\USER\S-1-5-21-1154728922-3261336865-3456416385-1000_CLASSES\.pyc\ = "pyc_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1154728922-3261336865-3456416385-1000_Classes\Local Settings	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1154728922-3261336865-3456416385-1000_CLASSES\pyc_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1154728922-3261336865-3456416385-1000_CLASSES\.pyc	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1154728922-3261336865-3456416385-1000_CLASSES\pyc_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1154728922-3261336865-3456416385-1000_CLASSES\pyc_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1154728922-3261336865-3456416385-1000_CLASSES\pyc_auto_file\shell\Read\command	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1154728922-3261336865-3456416385-1000_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-1-5-21-1154728922-3261336865-3456416385-1000_CLASSES\pyc_auto_file	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2560	AcroRd32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2560	AcroRd32.exe
2560	AcroRd32.exe
2560	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2516 wrote to memory of 2844	2516	cmd.exe	29
PID 2516 wrote to memory of 2844	2516	cmd.exe	29
PID 2516 wrote to memory of 2844	2516	cmd.exe	29
PID 2844 wrote to memory of 2560	2844	rundll32.exe	30
PID 2844 wrote to memory of 2560	2844	rundll32.exe	30
PID 2844 wrote to memory of 2560	2844	rundll32.exe	30
PID 2844 wrote to memory of 2560	2844	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\_weakrefset.pyc
1⤵
- Suspicious use of WriteProcessMemory
PID:2516
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\_weakrefset.pyc
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2844
- - 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\_weakrefset.pyc"
    3⤵
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:2560

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

Replay Monitor

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Downloads

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

Filesize
3KB

MD5
426c1f862b3556e887fe3999bd33d2ba

SHA1
b782c9c9f5f3fe14e6109d74cde35858c0ac0240

SHA256
4a3dda515101066569fa2483e03df2efe04da1186c8b0761ee068223234ae222

SHA512
0babc7ed44f888d8cc4542c18f6b5ef41e2ee4a1ea696ae1978b5bc94d9467a3c5316b4c7fd7b7333845c8679f45ba0833964aa939883009aa8dfdbd45c9f328

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