61449feab7bb5877fe19d52c28720d83e3fbfa4a9ee64a380b649a9b1cea8a86

Analysis

max time kernel
120s
max time network
126s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
25-02-2024 15:23

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General

Target

chrome_100_percent.pak
Size

163KB
MD5

4fc6564b727baa5fecf6bf3f6116cc64
SHA1

6ced7b16dc1abe862820dfe25f4fe7ead1d3f518
SHA256

b7805392bfce11118165e3a4e747ac0ca515e4e0ceadab356d685575f6aa45fb
SHA512

fa7eab7c9b67208bd076b2cbda575b5cc16a81f59cc9bba9512a0e85af97e2f3adebc543d0d847d348d513b9c7e8bef375ab2fef662387d87c82b296d76dffa2
SSDEEP

3072:IOzwJCGIekwdLpsXYFAXg6IL2o418Gb0+VRLf0ld0GY3cQ3ERVm2I:IOzw1Iekam5QpK18Gb0OV8ld0GecQ3Ey

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\Local Settings	rundll32.exe
Key created	\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	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\	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\pak_auto_file\shell\Read	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

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2548	AcroRd32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2548	AcroRd32.exe
2548	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1892 wrote to memory of 2608	1892	cmd.exe	30
PID 1892 wrote to memory of 2608	1892	cmd.exe	30
PID 1892 wrote to memory of 2608	1892	cmd.exe	30
PID 2608 wrote to memory of 2548	2608	rundll32.exe	31
PID 2608 wrote to memory of 2548	2608	rundll32.exe	31
PID 2608 wrote to memory of 2548	2608	rundll32.exe	31
PID 2608 wrote to memory of 2548	2608	rundll32.exe	31

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\chrome_100_percent.pak
1⤵
- Suspicious use of WriteProcessMemory
PID:1892
- 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:2608
- - 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:2548

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
5d9e9a75a72f509551cfaa9de00aa69b

SHA1
540ec4430f90ca86e0ea2f2011b6748f5f3b6a6d

SHA256
e37143dbd5917ed7d1158964e50e2e3f2cff0ed7ed4e89e774c0abe109c2564e

SHA512
ff453ed87e479014424653faaba5a957b720b89ee6845faf7a830f36f0fe8552df7ddc556e53069f8fbab5631da4f117546cffbcf61267aa30fcdd2ad98f1137

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