chaos | 3bd7ba1da919719a36e943d1c84a3b976a57d7f4d279b3e81f821f2a5a2e7c40

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21-08-2024 16:23

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22-01-2022 14:10

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Analysis

max time kernel
361s
max time network
361s
platform
windows7_x64
resource
win7-en-20211208
submitted
22-01-2022 14:10

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General

Target

666 virus.exe
Size

517KB
MD5

df0edf8b66d6a09c96802357d088d31b
SHA1

4018b609ef6e77c63c4028a12ca66051379b0633
SHA256

3bd7ba1da919719a36e943d1c84a3b976a57d7f4d279b3e81f821f2a5a2e7c40
SHA512

ee67b4e8465118b70820c7048620e82799c447d80f5d0dc97162c94ad7ce26ced0f273d6f18601be8cbf8340066755cff131563d4333bbc7258885addbf436db

Score

10^/10

chaos ransomware spyware stealer

Malware Config

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 4 IoCs

resource	yara_rule
behavioral1/memory/1332-55-0x0000000000ED0000-0x0000000000F56000-memory.dmp	family_chaos
behavioral1/files/0x00070000000132df-56.dat	family_chaos
behavioral1/files/0x00070000000132df-57.dat	family_chaos
behavioral1/memory/1560-58-0x00000000008D0000-0x0000000000956000-memory.dmp	family_chaos

Executes dropped EXE 1 IoCs

pid	Process
1560	svchost.exe

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.url	svchost.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Sets desktop wallpaper using registry 2 TTPs 2 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2329389628-4064185017-3901522362-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\gabpkjpaj.jpg"	svchost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2329389628-4064185017-3901522362-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\Pictures\\Wallpaper.jpg"	svchost.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2329389628-4064185017-3901522362-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2329389628-4064185017-3901522362-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\MuiCache	rundll32.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1560	svchost.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
1332	666 virus.exe
1332	666 virus.exe
1560	svchost.exe
1560	svchost.exe
1560	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
852	AcroRd32.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1332	666 virus.exe
Token: SeDebugPrivilege	1560	svchost.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
852	AcroRd32.exe
852	AcroRd32.exe
852	AcroRd32.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1332 wrote to memory of 1560	1332	666 virus.exe	27
PID 1332 wrote to memory of 1560	1332	666 virus.exe	27
PID 1332 wrote to memory of 1560	1332	666 virus.exe	27
PID 1560 wrote to memory of 1480	1560	svchost.exe	28
PID 1560 wrote to memory of 1480	1560	svchost.exe	28
PID 1560 wrote to memory of 1480	1560	svchost.exe	28
PID 1480 wrote to memory of 852	1480	rundll32.exe	29
PID 1480 wrote to memory of 852	1480	rundll32.exe	29
PID 1480 wrote to memory of 852	1480	rundll32.exe	29
PID 1480 wrote to memory of 852	1480	rundll32.exe	29

C:\Users\Admin\AppData\Local\Temp\666 virus.exe
"C:\Users\Admin\AppData\Local\Temp\666 virus.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1332
- C:\Users\Admin\AppData\Roaming\svchost.exe
  "C:\Users\Admin\AppData\Roaming\svchost.exe"
  2⤵
  - Executes dropped EXE
  - Drops startup file
  - Sets desktop wallpaper using registry
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1560
- - C:\Windows\system32\rundll32.exe
    "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Roaming\666
    3⤵
    - Modifies registry class
    - Suspicious use of WriteProcessMemory
    PID:1480
  - - 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\Roaming\666"
      4⤵
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of SetWindowsHookEx
      PID:852

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Defacement

T1491

Replay Monitor

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Downloads

memory/852-67-0x0000000075F91000-0x0000000075F93000-memory.dmp

Filesize
8KB

Download
memory/1332-55-0x0000000000ED0000-0x0000000000F56000-memory.dmp

Filesize
536KB

Download
memory/1480-59-0x000007FEFBD21000-0x000007FEFBD23000-memory.dmp

Filesize
8KB

Download
memory/1560-58-0x00000000008D0000-0x0000000000956000-memory.dmp

Filesize
536KB

Download
memory/1560-69-0x0000000002510000-0x000000001AA40000-memory.dmp

Filesize
389.2MB

Download