chaos | 87501bb9f50174d8d306bbbbebe12903ff01d75de0cc32714ed82991b57a86c6

Analysis

max time kernel
24s
max time network
18s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
27-10-2024 17:48

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General

Target

87501bb9f50174d8d306bbbbebe12903ff01d75de0cc32714ed82991b57a86c6.exe
Size

41KB
MD5

f4359c2c10233e0532b1456866d1dbfc
SHA1

18f4e7c0d3d94f89995ab7d2abd4bf01b250021d
SHA256

87501bb9f50174d8d306bbbbebe12903ff01d75de0cc32714ed82991b57a86c6
SHA512

de6baac827e7ff507192f956c6d1e374d7c0594ae33b6e766d6d5691d888ff383b1fe8f3f8ba211755fb36257bb83ad0cc605722cde0963f280bf923acce90f4
SSDEEP

768:6n3kI0xpAp6Br9StxXTVeVDC1SRUSnSk5mzAz2URJNZovB9VqiE7b7ed:A3kI3UBr9StGVhtSLzk2UR+v7VuSd

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/764-1-0x0000000000A00000-0x0000000000A10000-memory.dmp	family_chaos
behavioral1/files/0x000c000000012262-5.dat	family_chaos
behavioral1/memory/2252-7-0x00000000001E0000-0x00000000001F0000-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
1708	bcdedit.exe
1828	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
2476	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
2252	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	C:\Users\Public\Videos\Sample Videos\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\Public\Pictures\Sample Pictures\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\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\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\Pictures\desktop.ini	svchost.exe
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\Desktop\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\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\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Documents\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\Accessories\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\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\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\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Contacts\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\Recent\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\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\Maintenance\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-1-5-21-3692679935-4019334568-335155002-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\eijsbjaif.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
2372	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
1456	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2252	svchost.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
764	87501bb9f50174d8d306bbbbebe12903ff01d75de0cc32714ed82991b57a86c6.exe
764	87501bb9f50174d8d306bbbbebe12903ff01d75de0cc32714ed82991b57a86c6.exe
764	87501bb9f50174d8d306bbbbebe12903ff01d75de0cc32714ed82991b57a86c6.exe
2252	svchost.exe
2252	svchost.exe
2252	svchost.exe
2252	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	764	87501bb9f50174d8d306bbbbebe12903ff01d75de0cc32714ed82991b57a86c6.exe
Token: SeDebugPrivilege	2252	svchost.exe
Token: SeBackupPrivilege	1756	vssvc.exe
Token: SeRestorePrivilege	1756	vssvc.exe
Token: SeAuditPrivilege	1756	vssvc.exe
Token: SeIncreaseQuotaPrivilege	2284	WMIC.exe
Token: SeSecurityPrivilege	2284	WMIC.exe
Token: SeTakeOwnershipPrivilege	2284	WMIC.exe
Token: SeLoadDriverPrivilege	2284	WMIC.exe
Token: SeSystemProfilePrivilege	2284	WMIC.exe
Token: SeSystemtimePrivilege	2284	WMIC.exe
Token: SeProfSingleProcessPrivilege	2284	WMIC.exe
Token: SeIncBasePriorityPrivilege	2284	WMIC.exe
Token: SeCreatePagefilePrivilege	2284	WMIC.exe
Token: SeBackupPrivilege	2284	WMIC.exe
Token: SeRestorePrivilege	2284	WMIC.exe
Token: SeShutdownPrivilege	2284	WMIC.exe
Token: SeDebugPrivilege	2284	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2284	WMIC.exe
Token: SeRemoteShutdownPrivilege	2284	WMIC.exe
Token: SeUndockPrivilege	2284	WMIC.exe
Token: SeManageVolumePrivilege	2284	WMIC.exe
Token: 33	2284	WMIC.exe
Token: 34	2284	WMIC.exe
Token: 35	2284	WMIC.exe
Token: SeIncreaseQuotaPrivilege	2284	WMIC.exe
Token: SeSecurityPrivilege	2284	WMIC.exe
Token: SeTakeOwnershipPrivilege	2284	WMIC.exe
Token: SeLoadDriverPrivilege	2284	WMIC.exe
Token: SeSystemProfilePrivilege	2284	WMIC.exe
Token: SeSystemtimePrivilege	2284	WMIC.exe
Token: SeProfSingleProcessPrivilege	2284	WMIC.exe
Token: SeIncBasePriorityPrivilege	2284	WMIC.exe
Token: SeCreatePagefilePrivilege	2284	WMIC.exe
Token: SeBackupPrivilege	2284	WMIC.exe
Token: SeRestorePrivilege	2284	WMIC.exe
Token: SeShutdownPrivilege	2284	WMIC.exe
Token: SeDebugPrivilege	2284	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2284	WMIC.exe
Token: SeRemoteShutdownPrivilege	2284	WMIC.exe
Token: SeUndockPrivilege	2284	WMIC.exe
Token: SeManageVolumePrivilege	2284	WMIC.exe
Token: 33	2284	WMIC.exe
Token: 34	2284	WMIC.exe
Token: 35	2284	WMIC.exe
Token: SeBackupPrivilege	2492	wbengine.exe
Token: SeRestorePrivilege	2492	wbengine.exe
Token: SeSecurityPrivilege	2492	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 764 wrote to memory of 2252	764	87501bb9f50174d8d306bbbbebe12903ff01d75de0cc32714ed82991b57a86c6.exe	30
PID 764 wrote to memory of 2252	764	87501bb9f50174d8d306bbbbebe12903ff01d75de0cc32714ed82991b57a86c6.exe	30
PID 764 wrote to memory of 2252	764	87501bb9f50174d8d306bbbbebe12903ff01d75de0cc32714ed82991b57a86c6.exe	30
PID 2252 wrote to memory of 2268	2252	svchost.exe	32
PID 2252 wrote to memory of 2268	2252	svchost.exe	32
PID 2252 wrote to memory of 2268	2252	svchost.exe	32
PID 2268 wrote to memory of 2372	2268	cmd.exe	34
PID 2268 wrote to memory of 2372	2268	cmd.exe	34
PID 2268 wrote to memory of 2372	2268	cmd.exe	34
PID 2268 wrote to memory of 2284	2268	cmd.exe	37
PID 2268 wrote to memory of 2284	2268	cmd.exe	37
PID 2268 wrote to memory of 2284	2268	cmd.exe	37
PID 2252 wrote to memory of 1248	2252	svchost.exe	39
PID 2252 wrote to memory of 1248	2252	svchost.exe	39
PID 2252 wrote to memory of 1248	2252	svchost.exe	39
PID 1248 wrote to memory of 1708	1248	cmd.exe	41
PID 1248 wrote to memory of 1708	1248	cmd.exe	41
PID 1248 wrote to memory of 1708	1248	cmd.exe	41
PID 1248 wrote to memory of 1828	1248	cmd.exe	42
PID 1248 wrote to memory of 1828	1248	cmd.exe	42
PID 1248 wrote to memory of 1828	1248	cmd.exe	42
PID 2252 wrote to memory of 2472	2252	svchost.exe	43
PID 2252 wrote to memory of 2472	2252	svchost.exe	43
PID 2252 wrote to memory of 2472	2252	svchost.exe	43
PID 2472 wrote to memory of 2476	2472	cmd.exe	45
PID 2472 wrote to memory of 2476	2472	cmd.exe	45
PID 2472 wrote to memory of 2476	2472	cmd.exe	45
PID 2252 wrote to memory of 1456	2252	svchost.exe	49
PID 2252 wrote to memory of 1456	2252	svchost.exe	49
PID 2252 wrote to memory of 1456	2252	svchost.exe	49

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\87501bb9f50174d8d306bbbbebe12903ff01d75de0cc32714ed82991b57a86c6.exe
"C:\Users\Admin\AppData\Local\Temp\87501bb9f50174d8d306bbbbebe12903ff01d75de0cc32714ed82991b57a86c6.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:764
- 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:2252
- - 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:2268
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:2372
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:2284
- - 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:1248
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1708
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1828
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2472
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:2476
- - 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:1456

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1756

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2492

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:1644

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:2436

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
41KB

MD5
f4359c2c10233e0532b1456866d1dbfc

SHA1
18f4e7c0d3d94f89995ab7d2abd4bf01b250021d

SHA256
87501bb9f50174d8d306bbbbebe12903ff01d75de0cc32714ed82991b57a86c6

SHA512
de6baac827e7ff507192f956c6d1e374d7c0594ae33b6e766d6d5691d888ff383b1fe8f3f8ba211755fb36257bb83ad0cc605722cde0963f280bf923acce90f4

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

Filesize
964B

MD5
4217b8b83ce3c3f70029a056546f8fd0

SHA1
487cdb5733d073a0427418888e8f7070fe782a03

SHA256
7d767e907be373c680d1f7884d779588eb643bebb3f27bf3b5ed4864aa4d8121

SHA512
2a58c99fa52f99c276e27eb98aef2ce1205f16d1e37b7e87eb69e9ecda22b578195a43f1a7f70fead6ba70421abf2f85c917551c191536eaf1f3011d3d24f740

Download Submit
memory/764-0-0x000007FEF6423000-0x000007FEF6424000-memory.dmp

Filesize
4KB

Download
memory/764-1-0x0000000000A00000-0x0000000000A10000-memory.dmp

Filesize
64KB

Download
memory/2252-7-0x00000000001E0000-0x00000000001F0000-memory.dmp

Filesize
64KB

Download
memory/2252-9-0x000007FEF6420000-0x000007FEF6E0C000-memory.dmp

Filesize
9.9MB

Download
memory/2252-80-0x000007FEF6420000-0x000007FEF6E0C000-memory.dmp

Filesize
9.9MB

Download
memory/2252-81-0x000007FEF6420000-0x000007FEF6E0C000-memory.dmp

Filesize
9.9MB

Download
memory/2252-82-0x000007FEF6420000-0x000007FEF6E0C000-memory.dmp

Filesize
9.9MB

Download