f909ebd511da9da6f365d64c03a65ccd7ab6c25bbeec8734d6a860314e6d34eb

Analysis

max time kernel
117s
max time network
145s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
25/12/2023, 23:12

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General

Target

BepInEx/cache/chainloader_typeloader.dat
Size

2KB
MD5

e334096ed634bd0f83f8d89ef93c1844
SHA1

30006e930c1988ecc59a3b9a4a02894803efc90e
SHA256

a58cec818d5f9e367f5b3cfea7e2739f2159d3c4c33e2e6bc993714ab4046bdd
SHA512

e29f59d29124e0f481afd6c76e102809c976a4dabb4626518b51e9b88d23f03eb3b58f6651bf017f78ada8db56ff5da18d5f410821b00d5683afae5f6863659f

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-1-5-21-2444714103-3190537498-3629098939-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2444714103-3190537498-3629098939-1000_CLASSES\dat_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2444714103-3190537498-3629098939-1000_CLASSES\dat_auto_file\	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2444714103-3190537498-3629098939-1000_CLASSES\.dat\ = "dat_auto_file"	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2444714103-3190537498-3629098939-1000_CLASSES\dat_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2444714103-3190537498-3629098939-1000_CLASSES\.dat	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2444714103-3190537498-3629098939-1000_CLASSES\dat_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2444714103-3190537498-3629098939-1000_CLASSES\dat_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2444714103-3190537498-3629098939-1000_CLASSES\dat_auto_file\shell\Read\command	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2632	AcroRd32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2632	AcroRd32.exe
2632	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2668 wrote to memory of 2740	2668	cmd.exe	29
PID 2668 wrote to memory of 2740	2668	cmd.exe	29
PID 2668 wrote to memory of 2740	2668	cmd.exe	29
PID 2740 wrote to memory of 2632	2740	rundll32.exe	30
PID 2740 wrote to memory of 2632	2740	rundll32.exe	30
PID 2740 wrote to memory of 2632	2740	rundll32.exe	30
PID 2740 wrote to memory of 2632	2740	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\BepInEx\cache\chainloader_typeloader.dat
1⤵
- Suspicious use of WriteProcessMemory
PID:2668
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\BepInEx\cache\chainloader_typeloader.dat
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2740
- - 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\BepInEx\cache\chainloader_typeloader.dat"
    3⤵
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:2632

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
2da1a6e4e68389ee182835d1257091a6

SHA1
91df937a9f89f7167ce976a0ce329a5418d201d8

SHA256
d4b8709df49114b45c72f5d8cf56e1848a31e537951deb6bd309e0762d7be6ac

SHA512
c8387ea02e805630a838fd9b94aff77593c56f116462258c24c2cda7dae97dcb9adcf694db496ca2e6e761d50c03c5bbd501db9a903e4d0df7b45b6fe7e69dcf

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