d35d02cba96bd5cb9ef8e1eaa50a86eeb9e00cb5e345309471e8c28251efc125

Analysis

max time kernel
151s
max time network
128s
platform
windows7_x64
resource
win7-20230831-en
resource tags

arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
submitted
12/10/2023, 22:00

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General

Target

mask_frag.sh
Size

387B
MD5

9f1d977cabaef58dd9ace5a85c411d45
SHA1

fdc57f80881b492e305c48505c245a3211705530
SHA256

5331f0612a6c774a0c50de339f78fadb604711c60109906a0d44a6ecaa5c2dc8
SHA512

8ba72c46904b99f5dbc4ba33bc17a94c190d8f3fb2feb18a9d96042abf7eb2cfb6006254996ae313ae41d180cdc8a7b9860959de22a4f7ed9f780ab28c44b4bc

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-1-5-21-3513876443-2771975297-1923446376-1000_CLASSES\sh_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3513876443-2771975297-1923446376-1000_CLASSES\.sh	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3513876443-2771975297-1923446376-1000_CLASSES\.sh\ = "sh_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3513876443-2771975297-1923446376-1000_CLASSES\sh_auto_file\shell	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3513876443-2771975297-1923446376-1000_CLASSES\sh_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3513876443-2771975297-1923446376-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3513876443-2771975297-1923446376-1000_CLASSES\sh_auto_file	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3513876443-2771975297-1923446376-1000_CLASSES\sh_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3513876443-2771975297-1923446376-1000_CLASSES\sh_auto_file\shell\Read\command	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2900	AcroRd32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2900	AcroRd32.exe
2900	AcroRd32.exe
2900	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2892 wrote to memory of 2676	2892	cmd.exe	29
PID 2892 wrote to memory of 2676	2892	cmd.exe	29
PID 2892 wrote to memory of 2676	2892	cmd.exe	29
PID 2676 wrote to memory of 2900	2676	rundll32.exe	30
PID 2676 wrote to memory of 2900	2676	rundll32.exe	30
PID 2676 wrote to memory of 2900	2676	rundll32.exe	30
PID 2676 wrote to memory of 2900	2676	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\mask_frag.sh
1⤵
- Suspicious use of WriteProcessMemory
PID:2892
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\mask_frag.sh
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2676
- - 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\mask_frag.sh"
    3⤵
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:2900

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
0a483ba7d255b9a82cba1cdbf24260e2

SHA1
b08b72bd6ef8f18711c4e479d49452ea7b69a05e

SHA256
47e0f10cbba33413f0886400ff4364454571abcf92119cf294b5250c75fe0615

SHA512
931c15ad063719f41b38f8364a5676266e256e9c17c83878ba657344a45e9a61585c6f396f847bdaef6cdf4a109aa3853c1b6c3ecd3ae50511a5f4e138740865

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