fc788d41f02145ba4f9086674464826cc596a0843b73b285f2ae3426439b2d82

Analysis

max time kernel
121s
max time network
125s
platform
windows7_x64
resource
win7-20240419-en
resource tags

arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
submitted
01/05/2024, 20:34

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General

Target

Main/GuiHelper.class
Size

1KB
MD5

50e6378b71c82f4119426b8adcd76e6e
SHA1

ef2c656aa0d59c1a506ec244da7e91ec84150a6e
SHA256

2ef65e35c6a480d1e0fe49a621a1aaa8d3cffd4d5be0f72d45dbea3b839906a4
SHA512

535f7d2a99514e9b0adbaafbda06342bf317894f8154c6acc7faa71c873366124811183c2138afaee116478dfa68626dd59ab7235e5eda572b3b1e3f9723ec44

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-1-5-21-481678230-3773327859-3495911762-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-481678230-3773327859-3495911762-1000_CLASSES\.class	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-481678230-3773327859-3495911762-1000_CLASSES\class_auto_file\shell\Read\command	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-481678230-3773327859-3495911762-1000_CLASSES\class_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-481678230-3773327859-3495911762-1000_CLASSES\class_auto_file\	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-481678230-3773327859-3495911762-1000_CLASSES\.class\ = "class_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-481678230-3773327859-3495911762-1000_CLASSES\class_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-481678230-3773327859-3495911762-1000_CLASSES\class_auto_file\shell	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-481678230-3773327859-3495911762-1000_CLASSES\class_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
2860	AcroRd32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2860	AcroRd32.exe
2860	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2176 wrote to memory of 2600	2176	cmd.exe	29
PID 2176 wrote to memory of 2600	2176	cmd.exe	29
PID 2176 wrote to memory of 2600	2176	cmd.exe	29
PID 2600 wrote to memory of 2860	2600	rundll32.exe	30
PID 2600 wrote to memory of 2860	2600	rundll32.exe	30
PID 2600 wrote to memory of 2860	2600	rundll32.exe	30
PID 2600 wrote to memory of 2860	2600	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\Main\GuiHelper.class
1⤵
- Suspicious use of WriteProcessMemory
PID:2176
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\Main\GuiHelper.class
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2600
- - 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\Main\GuiHelper.class"
    3⤵
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:2860

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
6b27ab8bd6237362665283809b2eeb25

SHA1
925a474d1ef2255001a4df30f86c97af46b5bd5d

SHA256
32a8780372fcc578d76f67b6f696bedcb60295b7656ec06f9e4f309530fa01bb

SHA512
24f006eadc3d9a9ad05ead29715b26c330a8bdba4e129676f8a7dd66e26d496d66a8fd218acf9baabcac0823bcf2906b830b50dc85ee0e9f941c087acaf7e7ec

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