chaos | 24833a516b737c23c95033544877605e95b518e601290e3fd76609819d3c6c6e

General

Target

ransom.exe
Size

43KB
MD5

aaea4f5c500eefc364887278b249f2c3
SHA1

4b0561d911c0b6ebd656af498d9c1a57fe6f6347
SHA256

24833a516b737c23c95033544877605e95b518e601290e3fd76609819d3c6c6e
SHA512

2dafd50f3787886d6a4f444924c7d2228171cd0226d1d244f96887db6c74c84f25ce1ab39781fa28eb93d255838c37f63d00c2052157f28c76ce9ab334b76e43
SSDEEP

768:Vn3kI1tGdpnN2fKXRATr9iS0vMzCPBM6QawagVj7j3XlzqWUBb3Jee:F3kI1tEwImTr9iS0vxJM6u7j3Jq55oe

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

Processes:

resource	yara_rule
behavioral1/memory/1236-1-0x0000000000F70000-0x0000000000F82000-memory.dmp	family_chaos
C:\Users\Admin\AppData\Roaming\svchost.exe	family_chaos
behavioral1/memory/2880-8-0x0000000000020000-0x0000000000032000-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

Processes:

bcdedit.exebcdedit.exe

pid process

2208 bcdedit.exe
1720 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

Processes:

wbadmin.exe

pid process

1748 wbadmin.exe

pid	process
2208	bcdedit.exe
1720	bcdedit.exe

pid	process
1748	wbadmin.exe

Drops startup file 3 IoCs

Processes:

svchost.exe

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

Processes:

svchost.exe

pid process

2880 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

pid	process
2880	svchost.exe

Drops desktop.ini file(s) 34 IoCs

Processes:

svchost.exe

description	ioc	process
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-3692679935-4019334568-335155002-1000\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\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\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\Windows\SendTo\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\Contacts\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\Recent\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\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\Videos\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\Public\Music\Sample Music\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\Favorites\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\Internet Explorer\Quick Launch\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\User Pinned\TaskBar\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\Maintenance\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\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\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	svchost.exe

Sets desktop wallpaper using registry 2 TTPs 1 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\d6f8tcb2w.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

Processes:

vssadmin.exe

pid process

3032 vssadmin.exe
Opens file in notepad (likely ransom note) 1 IoCs
ransomware

Processes:

NOTEPAD.EXE

pid process

1548 NOTEPAD.EXE
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

svchost.exe

pid process

2880 svchost.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

ransom.exesvchost.exe

pid process

1236 ransom.exe
2880 svchost.exe
2880 svchost.exe

pid	process
3032	vssadmin.exe

pid	process
1548	NOTEPAD.EXE

pid	process
2880	svchost.exe

pid	process
1236	ransom.exe
2880	svchost.exe
2880	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

ransom.exesvchost.exevssvc.exeWMIC.exewbengine.exe

description	pid	process
Token: SeDebugPrivilege	1236	ransom.exe
Token: SeDebugPrivilege	2880	svchost.exe
Token: SeBackupPrivilege	2120	vssvc.exe
Token: SeRestorePrivilege	2120	vssvc.exe
Token: SeAuditPrivilege	2120	vssvc.exe
Token: SeIncreaseQuotaPrivilege	1252	WMIC.exe
Token: SeSecurityPrivilege	1252	WMIC.exe
Token: SeTakeOwnershipPrivilege	1252	WMIC.exe
Token: SeLoadDriverPrivilege	1252	WMIC.exe
Token: SeSystemProfilePrivilege	1252	WMIC.exe
Token: SeSystemtimePrivilege	1252	WMIC.exe
Token: SeProfSingleProcessPrivilege	1252	WMIC.exe
Token: SeIncBasePriorityPrivilege	1252	WMIC.exe
Token: SeCreatePagefilePrivilege	1252	WMIC.exe
Token: SeBackupPrivilege	1252	WMIC.exe
Token: SeRestorePrivilege	1252	WMIC.exe
Token: SeShutdownPrivilege	1252	WMIC.exe
Token: SeDebugPrivilege	1252	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1252	WMIC.exe
Token: SeRemoteShutdownPrivilege	1252	WMIC.exe
Token: SeUndockPrivilege	1252	WMIC.exe
Token: SeManageVolumePrivilege	1252	WMIC.exe
Token: 33	1252	WMIC.exe
Token: 34	1252	WMIC.exe
Token: 35	1252	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1252	WMIC.exe
Token: SeSecurityPrivilege	1252	WMIC.exe
Token: SeTakeOwnershipPrivilege	1252	WMIC.exe
Token: SeLoadDriverPrivilege	1252	WMIC.exe
Token: SeSystemProfilePrivilege	1252	WMIC.exe
Token: SeSystemtimePrivilege	1252	WMIC.exe
Token: SeProfSingleProcessPrivilege	1252	WMIC.exe
Token: SeIncBasePriorityPrivilege	1252	WMIC.exe
Token: SeCreatePagefilePrivilege	1252	WMIC.exe
Token: SeBackupPrivilege	1252	WMIC.exe
Token: SeRestorePrivilege	1252	WMIC.exe
Token: SeShutdownPrivilege	1252	WMIC.exe
Token: SeDebugPrivilege	1252	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1252	WMIC.exe
Token: SeRemoteShutdownPrivilege	1252	WMIC.exe
Token: SeUndockPrivilege	1252	WMIC.exe
Token: SeManageVolumePrivilege	1252	WMIC.exe
Token: 33	1252	WMIC.exe
Token: 34	1252	WMIC.exe
Token: 35	1252	WMIC.exe
Token: SeBackupPrivilege	1808	wbengine.exe
Token: SeRestorePrivilege	1808	wbengine.exe
Token: SeSecurityPrivilege	1808	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

ransom.exesvchost.execmd.execmd.execmd.exe

description	pid	process	target process
PID 1236 wrote to memory of 2880	1236	ransom.exe	svchost.exe
PID 1236 wrote to memory of 2880	1236	ransom.exe	svchost.exe
PID 1236 wrote to memory of 2880	1236	ransom.exe	svchost.exe
PID 2880 wrote to memory of 2780	2880	svchost.exe	cmd.exe
PID 2880 wrote to memory of 2780	2880	svchost.exe	cmd.exe
PID 2880 wrote to memory of 2780	2880	svchost.exe	cmd.exe
PID 2780 wrote to memory of 3032	2780	cmd.exe	vssadmin.exe
PID 2780 wrote to memory of 3032	2780	cmd.exe	vssadmin.exe
PID 2780 wrote to memory of 3032	2780	cmd.exe	vssadmin.exe
PID 2780 wrote to memory of 1252	2780	cmd.exe	WMIC.exe
PID 2780 wrote to memory of 1252	2780	cmd.exe	WMIC.exe
PID 2780 wrote to memory of 1252	2780	cmd.exe	WMIC.exe
PID 2880 wrote to memory of 544	2880	svchost.exe	cmd.exe
PID 2880 wrote to memory of 544	2880	svchost.exe	cmd.exe
PID 2880 wrote to memory of 544	2880	svchost.exe	cmd.exe
PID 544 wrote to memory of 2208	544	cmd.exe	bcdedit.exe
PID 544 wrote to memory of 2208	544	cmd.exe	bcdedit.exe
PID 544 wrote to memory of 2208	544	cmd.exe	bcdedit.exe
PID 544 wrote to memory of 1720	544	cmd.exe	bcdedit.exe
PID 544 wrote to memory of 1720	544	cmd.exe	bcdedit.exe
PID 544 wrote to memory of 1720	544	cmd.exe	bcdedit.exe
PID 2880 wrote to memory of 2584	2880	svchost.exe	cmd.exe
PID 2880 wrote to memory of 2584	2880	svchost.exe	cmd.exe
PID 2880 wrote to memory of 2584	2880	svchost.exe	cmd.exe
PID 2584 wrote to memory of 1748	2584	cmd.exe	wbadmin.exe
PID 2584 wrote to memory of 1748	2584	cmd.exe	wbadmin.exe
PID 2584 wrote to memory of 1748	2584	cmd.exe	wbadmin.exe
PID 2880 wrote to memory of 1548	2880	svchost.exe	NOTEPAD.EXE
PID 2880 wrote to memory of 1548	2880	svchost.exe	NOTEPAD.EXE
PID 2880 wrote to memory of 1548	2880	svchost.exe	NOTEPAD.EXE

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\ransom.exe
"C:\Users\Admin\AppData\Local\Temp\ransom.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1236
- 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:2880
- - 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:2780
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:3032
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:1252
- - 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:544
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2208
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1720
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2584
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:1748
- - 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:1548

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2120

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1808

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:708

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:2600

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Management Instrumentation

1

T1047

Persistence

Privilege Escalation

Defense Evasion

Direct Volume Access

1

T1006

Indicator Removal

3

T1070

File Deletion

Modify Registry

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

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Defacement

1

T1491

Inhibit System Recovery

4

T1490

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Downloads

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

Filesize
43KB

MD5
aaea4f5c500eefc364887278b249f2c3

SHA1
4b0561d911c0b6ebd656af498d9c1a57fe6f6347

SHA256
24833a516b737c23c95033544877605e95b518e601290e3fd76609819d3c6c6e

SHA512
2dafd50f3787886d6a4f444924c7d2228171cd0226d1d244f96887db6c74c84f25ce1ab39781fa28eb93d255838c37f63d00c2052157f28c76ce9ab334b76e43

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

Filesize
964B

MD5
4217b8b83ce3c3f70029a056546f8fd0

SHA1
487cdb5733d073a0427418888e8f7070fe782a03

SHA256
7d767e907be373c680d1f7884d779588eb643bebb3f27bf3b5ed4864aa4d8121

SHA512
2a58c99fa52f99c276e27eb98aef2ce1205f16d1e37b7e87eb69e9ecda22b578195a43f1a7f70fead6ba70421abf2f85c917551c191536eaf1f3011d3d24f740

Download Submit
memory/1236-0-0x000007FEF65A3000-0x000007FEF65A4000-memory.dmp

Filesize
4KB

Download
memory/1236-1-0x0000000000F70000-0x0000000000F82000-memory.dmp

Filesize
72KB

Download
memory/1236-2-0x000007FEF65A3000-0x000007FEF65A4000-memory.dmp

Filesize
4KB

Download
memory/2880-8-0x0000000000020000-0x0000000000032000-memory.dmp

Filesize
72KB

Download
memory/2880-18-0x000007FEF65A0000-0x000007FEF6F8C000-memory.dmp

Filesize
9.9MB

Download
memory/2880-71-0x000007FEF65A0000-0x000007FEF6F8C000-memory.dmp

Filesize
9.9MB

Download
memory/2880-77-0x000007FEF65A0000-0x000007FEF6F8C000-memory.dmp

Filesize
9.9MB

Download
memory/2880-78-0x000007FEF65A0000-0x000007FEF6F8C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads