chaos | eab0b70f3de7f7d5be417a5e03d293e652d403f363b39d30f73c53f2672af434

General

Target

svhost.exe
Size

22KB
MD5

54bcbd6d45bc3bc155576d759f1a6ae6
SHA1

c9fcbd1ac3c48f41f17920d63dd03fef6adeba27
SHA256

eab0b70f3de7f7d5be417a5e03d293e652d403f363b39d30f73c53f2672af434
SHA512

b93de78e72cc012b9bd719b767e8d4dc0ee4dec81ecd102d984b6f80470da38da1c911e2c169e1d4b7a7ad9e0e96487aff71f24239196c52480217c4c9fb761d
SSDEEP

384:k3Mg/bqo2OhGv+2jAp6AnXNdd10JFr91CT7d5eH:aqo2Nv4p/ndlcFr9QHeH

Score

10^/10

chaos ransomware spyware stealer

Malware Config

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 2 IoCs

resource	yara_rule
behavioral1/memory/4956-1-0x0000000000760000-0x000000000076C000-memory.dmp	family_chaos
behavioral1/files/0x0076000000046191-3.dat	family_chaos

Chaos family
chaos

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3506525125-3566313221-3651816328-1000\Control Panel\International\Geo\Nation	svhost.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3506525125-3566313221-3651816328-1000\Control Panel\International\Geo\Nation	svchost.exe

Drops startup file 3 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
2924	svchost.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Drops desktop.ini file(s) 31 IoCs

description	ioc	Process
File opened for modification	C:\Users\Public\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\AccountPictures\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\Favorites\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Searches\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Contacts\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\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\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\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\OneDrive\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\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\Music\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\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-3506525125-3566313221-3651816328-1000\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Desktop\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\Accessibility\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\System Tools\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	svchost.exe

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

System Information Discovery
T1082

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3506525125-3566313221-3651816328-1000_Classes\Local Settings	svchost.exe
Key created	\REGISTRY\USER\S-1-5-21-3506525125-3566313221-3651816328-1000_Classes\Local Settings	OpenWith.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
1596	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2924	svchost.exe

Suspicious behavior: EnumeratesProcesses 47 IoCs

pid	Process
4956	svhost.exe
4956	svhost.exe
4956	svhost.exe
4956	svhost.exe
4956	svhost.exe
4956	svhost.exe
4956	svhost.exe
4956	svhost.exe
4956	svhost.exe
4956	svhost.exe
4956	svhost.exe
4956	svhost.exe
4956	svhost.exe
4956	svhost.exe
4956	svhost.exe
4956	svhost.exe
4956	svhost.exe
4956	svhost.exe
4956	svhost.exe
4956	svhost.exe
4956	svhost.exe
4956	svhost.exe
4956	svhost.exe
4956	svhost.exe
4956	svhost.exe
2924	svchost.exe
2924	svchost.exe
2924	svchost.exe
2924	svchost.exe
2924	svchost.exe
2924	svchost.exe
2924	svchost.exe
2924	svchost.exe
2924	svchost.exe
2924	svchost.exe
2924	svchost.exe
2924	svchost.exe
2924	svchost.exe
2924	svchost.exe
2924	svchost.exe
2924	svchost.exe
2924	svchost.exe
2924	svchost.exe
2924	svchost.exe
2924	svchost.exe
2924	svchost.exe
2924	svchost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4956	svhost.exe
Token: SeDebugPrivilege	2924	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4376	OpenWith.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4956 wrote to memory of 2924	4956	svhost.exe	83
PID 4956 wrote to memory of 2924	4956	svhost.exe	83
PID 2924 wrote to memory of 1596	2924	svchost.exe	85
PID 2924 wrote to memory of 1596	2924	svchost.exe	85

C:\Users\Admin\AppData\Local\Temp\svhost.exe
"C:\Users\Admin\AppData\Local\Temp\svhost.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4956
- C:\Users\Admin\AppData\Roaming\svchost.exe
  "C:\Users\Admin\AppData\Roaming\svchost.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Drops desktop.ini file(s)
  - Modifies registry class
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2924
- - 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:1596

C:\Windows\system32\OpenWith.exe
C:\Windows\system32\OpenWith.exe -Embedding
1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:4376

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\svchost.exe

Filesize
22KB

MD5
54bcbd6d45bc3bc155576d759f1a6ae6

SHA1
c9fcbd1ac3c48f41f17920d63dd03fef6adeba27

SHA256
eab0b70f3de7f7d5be417a5e03d293e652d403f363b39d30f73c53f2672af434

SHA512
b93de78e72cc012b9bd719b767e8d4dc0ee4dec81ecd102d984b6f80470da38da1c911e2c169e1d4b7a7ad9e0e96487aff71f24239196c52480217c4c9fb761d

Download Submit
C:\Users\Admin\Documents\read_it.txt

Filesize
243B

MD5
a2b531a72ac79eb47c070396dc8bb3eb

SHA1
b36ea6f9dafbad171034411ae467e0a6483e3b6b

SHA256
e2815768120ae0ea2e45bd1772143f27dcaacf09b4a47ee4adbda224f00a12a0

SHA512
35776c877615db7480464b916b8b755fa52d16574286a12b651e2afe410e9baa05184c837314503593ac134f726b0b9a76db22d3b019a500a75654837ad532ab

Download Submit
memory/2924-5-0x00007FFB448E0000-0x00007FFB453A2000-memory.dmp

Filesize
10.8MB

Download
memory/2924-477-0x00007FFB448E0000-0x00007FFB453A2000-memory.dmp

Filesize
10.8MB

Download
memory/4956-0-0x00007FFB448E3000-0x00007FFB448E5000-memory.dmp

Filesize
8KB

Download
memory/4956-1-0x0000000000760000-0x000000000076C000-memory.dmp

Filesize
48KB

Download
memory/4956-2-0x00007FFB448E3000-0x00007FFB448E5000-memory.dmp

Filesize
8KB

Download

Analysis

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