chaos | 4fba7c66c4fedc46793a324e514b073635a54ab72f9af9685b88c29297168de3

Analysis

max time kernel
122s
max time network
122s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
16-12-2024 18:09

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General

Target

test123.exe
Size

397KB
MD5

ac5a257992599ba6e64e705cff27a671
SHA1

15854c4b735880e0aa384e85f306e4adf67140f5
SHA256

4fba7c66c4fedc46793a324e514b073635a54ab72f9af9685b88c29297168de3
SHA512

9af441aeb9fd4860aa3aa11ceefe68520f79b8e40a9be45f0ae37c2910ff52647c1299975ea1ba77e84d905fd46ab448971b1135b122496ffae55221ac9f3f66
SSDEEP

12288:D92GgykqXIBXPtrJwZvXO/6hVGhGIcVO+HGgIOXK:R7sL

Score

10^/10

chaos defense_evasion evasion execution impact ransomware spyware stealer

Malware Config

Extracted

Path

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

Family

chaos

Ransom Note

----> Chaos is multi language ransomware. Translate your note to any language <---- 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 $1,500. Payment can be made in Bitcoin only. How do I pay, where do I get Bitcoin? 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: 0.1473766 BTC Bitcoin Address: bc1qlnzcep4l4ac0ttdrq7awxev9ehu465f2vpt9x0

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 3 IoCs

resource	yara_rule
behavioral1/memory/1852-1-0x00000000008C0000-0x000000000092A000-memory.dmp	family_chaos
behavioral1/files/0x000f0000000139a5-4.dat	family_chaos
behavioral1/memory/1664-7-0x0000000000A50000-0x0000000000ABA000-memory.dmp	family_chaos

Chaos family
chaos
Deletes shadow copies 3 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware defense_evasion impact execution

File Deletion
T1070.004

Inhibit System Recovery
T1490

Windows Management Instrumentation
T1047

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
1028	bcdedit.exe
2280	bcdedit.exe

Deletes backup catalog 3 TTPs 1 IoCs

Uses wbadmin.exe to inhibit system recovery.

ransomware

Command and Scripting Interpreter

T1059

File Deletion

T1070.004

Inhibit System Recovery

T1490

pid	Process
2216	wbadmin.exe

Drops startup file 3 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
1664	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) 34 IoCs

description	ioc	Process
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-312935884-697965778-3955649944-1000\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Saved Games\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\Recent\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\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\Accessories\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\Sample Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\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\SendTo\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\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\Sample Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\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\Windows\Start Menu\Programs\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\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\Music\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\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\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\AppData\Roaming\Microsoft\Windows\Libraries\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\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	svchost.exe

Sets desktop wallpaper using registry 2 TTPs 2 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\35v9w6g8c.jpg"	svchost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\Pictures\\My Wallpaper.jpg"	svchost.exe

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

System Information Discovery
T1082

Interacts with shadow copies 3 TTPs 1 IoCs

Shadow copies are often targeted by ransomware to inhibit system recovery.

ransomware

File Deletion

T1070.004

Inhibit System Recovery

T1490

Direct Volume Access

T1006

pid	Process
2872	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
916	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1664	svchost.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
1852	test123.exe
1852	test123.exe
1852	test123.exe
1664	svchost.exe
1664	svchost.exe
1664	svchost.exe
1664	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	1852	test123.exe
Token: SeDebugPrivilege	1664	svchost.exe
Token: SeBackupPrivilege	2604	vssvc.exe
Token: SeRestorePrivilege	2604	vssvc.exe
Token: SeAuditPrivilege	2604	vssvc.exe
Token: SeIncreaseQuotaPrivilege	1996	WMIC.exe
Token: SeSecurityPrivilege	1996	WMIC.exe
Token: SeTakeOwnershipPrivilege	1996	WMIC.exe
Token: SeLoadDriverPrivilege	1996	WMIC.exe
Token: SeSystemProfilePrivilege	1996	WMIC.exe
Token: SeSystemtimePrivilege	1996	WMIC.exe
Token: SeProfSingleProcessPrivilege	1996	WMIC.exe
Token: SeIncBasePriorityPrivilege	1996	WMIC.exe
Token: SeCreatePagefilePrivilege	1996	WMIC.exe
Token: SeBackupPrivilege	1996	WMIC.exe
Token: SeRestorePrivilege	1996	WMIC.exe
Token: SeShutdownPrivilege	1996	WMIC.exe
Token: SeDebugPrivilege	1996	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1996	WMIC.exe
Token: SeRemoteShutdownPrivilege	1996	WMIC.exe
Token: SeUndockPrivilege	1996	WMIC.exe
Token: SeManageVolumePrivilege	1996	WMIC.exe
Token: 33	1996	WMIC.exe
Token: 34	1996	WMIC.exe
Token: 35	1996	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1996	WMIC.exe
Token: SeSecurityPrivilege	1996	WMIC.exe
Token: SeTakeOwnershipPrivilege	1996	WMIC.exe
Token: SeLoadDriverPrivilege	1996	WMIC.exe
Token: SeSystemProfilePrivilege	1996	WMIC.exe
Token: SeSystemtimePrivilege	1996	WMIC.exe
Token: SeProfSingleProcessPrivilege	1996	WMIC.exe
Token: SeIncBasePriorityPrivilege	1996	WMIC.exe
Token: SeCreatePagefilePrivilege	1996	WMIC.exe
Token: SeBackupPrivilege	1996	WMIC.exe
Token: SeRestorePrivilege	1996	WMIC.exe
Token: SeShutdownPrivilege	1996	WMIC.exe
Token: SeDebugPrivilege	1996	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1996	WMIC.exe
Token: SeRemoteShutdownPrivilege	1996	WMIC.exe
Token: SeUndockPrivilege	1996	WMIC.exe
Token: SeManageVolumePrivilege	1996	WMIC.exe
Token: 33	1996	WMIC.exe
Token: 34	1996	WMIC.exe
Token: 35	1996	WMIC.exe
Token: SeBackupPrivilege	1592	wbengine.exe
Token: SeRestorePrivilege	1592	wbengine.exe
Token: SeSecurityPrivilege	1592	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1852 wrote to memory of 1664	1852	test123.exe	31
PID 1852 wrote to memory of 1664	1852	test123.exe	31
PID 1852 wrote to memory of 1664	1852	test123.exe	31
PID 1664 wrote to memory of 2724	1664	svchost.exe	32
PID 1664 wrote to memory of 2724	1664	svchost.exe	32
PID 1664 wrote to memory of 2724	1664	svchost.exe	32
PID 2724 wrote to memory of 2872	2724	cmd.exe	34
PID 2724 wrote to memory of 2872	2724	cmd.exe	34
PID 2724 wrote to memory of 2872	2724	cmd.exe	34
PID 2724 wrote to memory of 1996	2724	cmd.exe	38
PID 2724 wrote to memory of 1996	2724	cmd.exe	38
PID 2724 wrote to memory of 1996	2724	cmd.exe	38
PID 1664 wrote to memory of 2176	1664	svchost.exe	40
PID 1664 wrote to memory of 2176	1664	svchost.exe	40
PID 1664 wrote to memory of 2176	1664	svchost.exe	40
PID 2176 wrote to memory of 1028	2176	cmd.exe	42
PID 2176 wrote to memory of 1028	2176	cmd.exe	42
PID 2176 wrote to memory of 1028	2176	cmd.exe	42
PID 2176 wrote to memory of 2280	2176	cmd.exe	43
PID 2176 wrote to memory of 2280	2176	cmd.exe	43
PID 2176 wrote to memory of 2280	2176	cmd.exe	43
PID 1664 wrote to memory of 1600	1664	svchost.exe	44
PID 1664 wrote to memory of 1600	1664	svchost.exe	44
PID 1664 wrote to memory of 1600	1664	svchost.exe	44
PID 1600 wrote to memory of 2216	1600	cmd.exe	46
PID 1600 wrote to memory of 2216	1600	cmd.exe	46
PID 1600 wrote to memory of 2216	1600	cmd.exe	46
PID 1664 wrote to memory of 916	1664	svchost.exe	50
PID 1664 wrote to memory of 916	1664	svchost.exe	50
PID 1664 wrote to memory of 916	1664	svchost.exe	50

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012
Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

C:\Users\Admin\AppData\Local\Temp\test123.exe
"C:\Users\Admin\AppData\Local\Temp\test123.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1852
- C:\Users\Admin\AppData\Roaming\svchost.exe
  "C:\Users\Admin\AppData\Roaming\svchost.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - 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:1664
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2724
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:2872
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:1996
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2176
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1028
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2280
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1600
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:2216
- - 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:916

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2604

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1592

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:2656

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:1512

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Windows Management Instrumentation

T1047

Persistence

Privilege Escalation

Defense Evasion

Direct Volume Access

T1006

Indicator Removal

T1070

File Deletion

T1070.004

Modify Registry

T1112

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Defacement

T1491

Inhibit System Recovery

T1490

Replay Monitor

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Downloads

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

Filesize
397KB

MD5
ac5a257992599ba6e64e705cff27a671

SHA1
15854c4b735880e0aa384e85f306e4adf67140f5

SHA256
4fba7c66c4fedc46793a324e514b073635a54ab72f9af9685b88c29297168de3

SHA512
9af441aeb9fd4860aa3aa11ceefe68520f79b8e40a9be45f0ae37c2910ff52647c1299975ea1ba77e84d905fd46ab448971b1135b122496ffae55221ac9f3f66

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

Filesize
964B

MD5
4217b8b83ce3c3f70029a056546f8fd0

SHA1
487cdb5733d073a0427418888e8f7070fe782a03

SHA256
7d767e907be373c680d1f7884d779588eb643bebb3f27bf3b5ed4864aa4d8121

SHA512
2a58c99fa52f99c276e27eb98aef2ce1205f16d1e37b7e87eb69e9ecda22b578195a43f1a7f70fead6ba70421abf2f85c917551c191536eaf1f3011d3d24f740

Download Submit
memory/1664-7-0x0000000000A50000-0x0000000000ABA000-memory.dmp

Filesize
424KB

Download
memory/1664-9-0x000007FEF5B70000-0x000007FEF655C000-memory.dmp

Filesize
9.9MB

Download
memory/1664-74-0x000007FEF5B70000-0x000007FEF655C000-memory.dmp

Filesize
9.9MB

Download
memory/1664-75-0x000007FEF5B70000-0x000007FEF655C000-memory.dmp

Filesize
9.9MB

Download
memory/1852-0-0x000007FEF5B73000-0x000007FEF5B74000-memory.dmp

Filesize
4KB

Download
memory/1852-1-0x00000000008C0000-0x000000000092A000-memory.dmp

Filesize
424KB

Download