b625765ce751d3a56674fee9215ba69777a3e7ab37e6cbcf418c918de423c0a3

Analysis

max time kernel
150s
max time network
127s
platform
windows7_x64
resource
win7-20230831-en
resource tags

arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
submitted
11-09-2023 22:02

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General

Target

base_fragment.sh
Size

161B
MD5

5b293a8112b38e1222fd981265e12dd3
SHA1

a888f14ac2b39c90b68f194e3a69e0754f1a78fc
SHA256

0980057dba7e8a8d76f5137a5c69a6e9b08f8903cfb2c2921c603b9f1233c544
SHA512

606e6aa3bac1e39548e84d8f11f8e4ce23106ef0044b5f358f30b4f2a5b49ad5805464b804dfd19bfa34b37b76d1d5a8dd4223bab483cf5e9e953d387e69a4ec

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-1-5-21-3849525425-30183055-657688904-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3849525425-30183055-657688904-1000_CLASSES\.sh	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3849525425-30183055-657688904-1000_CLASSES\sh_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3849525425-30183055-657688904-1000_CLASSES\sh_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3849525425-30183055-657688904-1000_CLASSES\sh_auto_file\	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3849525425-30183055-657688904-1000_CLASSES\.sh\ = "sh_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3849525425-30183055-657688904-1000_CLASSES\sh_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3849525425-30183055-657688904-1000_CLASSES\sh_auto_file\shell\Read\command	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3849525425-30183055-657688904-1000_CLASSES\sh_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
2620	AcroRd32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2620	AcroRd32.exe
2620	AcroRd32.exe
2620	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2936 wrote to memory of 2764	2936	cmd.exe	29
PID 2936 wrote to memory of 2764	2936	cmd.exe	29
PID 2936 wrote to memory of 2764	2936	cmd.exe	29
PID 2764 wrote to memory of 2620	2764	rundll32.exe	30
PID 2764 wrote to memory of 2620	2764	rundll32.exe	30
PID 2764 wrote to memory of 2620	2764	rundll32.exe	30
PID 2764 wrote to memory of 2620	2764	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\base_fragment.sh
1⤵
- Suspicious use of WriteProcessMemory
PID:2936
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\base_fragment.sh
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2764
- - 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\base_fragment.sh"
    3⤵
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:2620

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
5abc565ceb8d24d3cf0bbbd74177628c

SHA1
0302aae2f14ead57bc3264c9fba3147fea6325d2

SHA256
526de8c3757577e54f27e9a05e1227a22db3f5450d85af2d10a6f05abe6458f3

SHA512
971a59ecce0f530af63c68a67ab49fd01b536bf6336a737f4acbf4e81657b38cb28ef4473428d978a3587d791b2dfc48d8b3564334d4eb9b5e2009b49b53b2f3

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