20ecc8d6a8738b7dc3bdd19c19c4348cb4206b4e7368d253d5516ccf07e90093

Analysis

max time kernel
118s
max time network
122s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
22-02-2024 08:51

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General

Target

chrome_100_percent.pak
Size

126KB
MD5

d31f3439e2a3f7bee4ddd26f46a2b83f
SHA1

c5a26f86eb119ae364c5bf707bebed7e871fc214
SHA256

9f79f46ca911543ead096a5ee28a34bf1fbe56ec9ba956032a6a2892b254857e
SHA512

aa27c97bf5581eb3f5e88f112df8bfb6a5283ce44eb13fbc41855008f84fb5b111dfe0616c310c3642b7f8ac99623d7c217aecc353f54f4d8f7042840099abc5
SSDEEP

3072:5KzwqCT4waJL2myFhPNL2o418Gb0+VRLf0ld0GY3cQ39Vm2I:5Kzwt4LwmU3K18Gb0OV8ld0GecQ3f2

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-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\.pak	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\pak_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\pak_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\pak_auto_file\shell\Read\command	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\pak_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\pak_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\pak_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\.pak\ = "pak_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_Classes\Local Settings	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2664	AcroRd32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2664	AcroRd32.exe
2664	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1800 wrote to memory of 2616	1800	cmd.exe	29
PID 1800 wrote to memory of 2616	1800	cmd.exe	29
PID 1800 wrote to memory of 2616	1800	cmd.exe	29
PID 2616 wrote to memory of 2664	2616	rundll32.exe	30
PID 2616 wrote to memory of 2664	2616	rundll32.exe	30
PID 2616 wrote to memory of 2664	2616	rundll32.exe	30
PID 2616 wrote to memory of 2664	2616	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\chrome_100_percent.pak
1⤵
- Suspicious use of WriteProcessMemory
PID:1800
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\chrome_100_percent.pak
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2616
- - 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\chrome_100_percent.pak"
    3⤵
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:2664

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
2fa85aedffbc19afeca51a5bc05b7b1a

SHA1
985cd2be3e9a6ad1b5f9e1f142c2e9d203f1b68f

SHA256
5ed72d17db4a81b4645a59c8f4cea39aa4ba608ddf6ad97be04726f2b8c94ab0

SHA512
4119963756c585a94f534a83110ff9f4aff3b772fb098b8e0966454b7f8bf1fce71567412efacedffae10f5358c63ab2f3789e24ea65d6ed4f7f73c8ed0c3531

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