chaos | b103fc649787eb1f6121df8174d0f16aaac736fb53f5f078d312871189285956

Analysis

max time kernel
15s
max time network
39s
platform
windows7_x64
resource
win7v20210408
submitted
02-09-2021 20:17

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General

Target

svchost.exe
Size

61KB
MD5

9eb958c38bd3d39c55b009f9a200f42f
SHA1

b5ab794dd5821d08f7ecd860ba7975a6644dd46d
SHA256

b103fc649787eb1f6121df8174d0f16aaac736fb53f5f078d312871189285956
SHA512

f7146fa64c8fe89eb4afb29af0b85e1693a03aeb38ae2948b8c047b4f1dd84817954563b6bd5ead4c4461242e1275c47ef4b41cf33fe9e3899dfe3952bc46954

Score

10^/10

chaos ransomware spyware stealer

Malware Config

Extracted

Path

C:\Users\Admin\Desktop\read_it.txt

Ransom Note

All of your files have been encrypted Your computer was infected with a ransomware virus. Your files have been encrypted and you won't be able to decrypt them without our help. What can I do to get my files back? You can buy our special decryption software, this software will allow you to recover all of your data and remove the ransomware from your computer. The price for the software is £50 GBP. Payment can be made in Bitcoin, PayPal. How do I pay, where do I get Bitcoin? PayPal: https://paypal.me/GoldenWolf42 Purchasing Bitcoin varies from country to country, you are best advised to do a quick google search yourself to find out how to buy Bitcoin. Many of our customers have reported these sites to be fast and reliable: Coinmama - hxxps://www.coinmama.com Bitpanda - hxxps://www.bitpanda.com Payment informationAmount: 0.0014 BTC Bitcoin Address: bc1qu6tharwawwny28z9fj6nrxg5cqftaep9ap6z2v PayPal: https://paypal.me/GoldenWolf42 (£50, Family And Friends)

URLs

https://paypal.me/GoldenWolf42

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 2 IoCs

resource	yara_rule
behavioral1/files/0x00040000000130dd-63.dat	family_chaos
behavioral1/files/0x00040000000130dd-64.dat	family_chaos

Executes dropped EXE 1 IoCs

pid	Process
1972	svchost.exe

Modifies extensions of user files 5 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File renamed	C:\Users\Admin\Pictures\ConvertFromFind.tif => C:\Users\Admin\Pictures\ConvertFromFind.tif.GoldenWolf42	svchost.exe
File renamed	C:\Users\Admin\Pictures\DenyCheckpoint.raw => C:\Users\Admin\Pictures\DenyCheckpoint.raw.GoldenWolf42	svchost.exe
File renamed	C:\Users\Admin\Pictures\EnableRemove.raw => C:\Users\Admin\Pictures\EnableRemove.raw.GoldenWolf42	svchost.exe
File renamed	C:\Users\Admin\Pictures\ReadMount.png => C:\Users\Admin\Pictures\ReadMount.png.GoldenWolf42	svchost.exe
File renamed	C:\Users\Admin\Pictures\ReadSuspend.png => C:\Users\Admin\Pictures\ReadSuspend.png.GoldenWolf42	svchost.exe

Drops startup file 3 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini	svchost.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\read_it.txt	svchost.exe
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

Drops desktop.ini file(s) 33 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\Links for United States\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Searches\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\Sample Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\Sample Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	svchost.exe

Sets desktop wallpaper using registry 2 TTPs 1 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\8lmytu09o.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

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
1540	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1972	svchost.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
1824	svchost.exe
1824	svchost.exe
1972	svchost.exe
1972	svchost.exe
1972	svchost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1824	svchost.exe
Token: SeDebugPrivilege	1972	svchost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1824 wrote to memory of 1972	1824	svchost.exe	26
PID 1824 wrote to memory of 1972	1824	svchost.exe	26
PID 1824 wrote to memory of 1972	1824	svchost.exe	26
PID 1972 wrote to memory of 1540	1972	svchost.exe	31
PID 1972 wrote to memory of 1540	1972	svchost.exe	31
PID 1972 wrote to memory of 1540	1972	svchost.exe	31

C:\Users\Admin\AppData\Local\Temp\svchost.exe
"C:\Users\Admin\AppData\Local\Temp\svchost.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1824
- C:\Users\Admin\AppData\Roaming\svchost.exe
  "C:\Users\Admin\AppData\Roaming\svchost.exe"
  2⤵
  - Executes dropped EXE
  - Modifies extensions of user files
  - Drops startup file
  - Drops desktop.ini file(s)
  - Sets desktop wallpaper using registry
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1972
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read_it.txt
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:1540

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/1540-69-0x000007FEFB631000-0x000007FEFB633000-memory.dmp

Filesize
8KB

Download
memory/1824-60-0x0000000000C30000-0x0000000000C31000-memory.dmp

Filesize
4KB

Download
memory/1972-65-0x00000000003B0000-0x00000000003B1000-memory.dmp

Filesize
4KB

Download
memory/1972-67-0x000000001AC10000-0x000000001AC12000-memory.dmp

Filesize
8KB

Download