chaos | 95091becfe2ce086fb66894624637c844ea89fb0076aec5d131c4b5e4f95edfd

Analysis

max time kernel
121s
max time network
121s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
15-05-2024 21:35

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General

Target

2024-05-15_8211488f6520148d312e6b498aa4ff9d_chaos_destroyer_wannacry.exe
Size

23KB
MD5

8211488f6520148d312e6b498aa4ff9d
SHA1

99c95c9e010d2e3d512f7c68ff482e1e80262c2b
SHA256

95091becfe2ce086fb66894624637c844ea89fb0076aec5d131c4b5e4f95edfd
SHA512

36060945aceaeef7a084c0f91518daafa7d18361bda51b53ca3ebc09f83b3dc32e626b9216acc755e7b23fa8f34beec3c75ac6436562a678b3b32e0e72d0e4cd
SSDEEP

384:S83Mg/bqo2PO0be6UpeAN4+X0Z/NJYDr91CO1pb5oevY:1qo2fdUpeg4+kR7YDr9Zpbeeg

Score

10^/10

chaos defense_evasion evasion execution impact ransomware spyware stealer

Malware Config

Extracted

Path

C:\Users\Admin\Documents\README.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/1924-1-0x0000000000DF0000-0x0000000000DFC000-memory.dmp	family_chaos
behavioral1/files/0x000b000000015bb9-5.dat	family_chaos
behavioral1/memory/2804-7-0x00000000011F0000-0x00000000011FC000-memory.dmp	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

Detects command variations typically used by ransomware 3 IoCs

resource	yara_rule
behavioral1/memory/1924-1-0x0000000000DF0000-0x0000000000DFC000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/files/0x000b000000015bb9-5.dat	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/memory/2804-7-0x00000000011F0000-0x00000000011FC000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
2028	bcdedit.exe
2016	bcdedit.exe

Renames multiple (195) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

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
2992	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\README.txt	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2804	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
T1552.001

Drops desktop.ini file(s) 34 IoCs

description	ioc	Process
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-2297530677-1229052932-2803917579-1000\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\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\Accessories\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\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\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 for United States\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\Accessibility\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\Downloads\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\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\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\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\Windows\Start Menu\Programs\Administrative 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\Admin\Contacts\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Music\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\Recent\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\Videos\Sample Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\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\Start Menu\Programs\Accessories\System Tools\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	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 2 TTPs 1 IoCs

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

ransomware

File Deletion

T1070.004

Inhibit System Recovery

T1490

pid	Process
2648	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
1772	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2804	svchost.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1924	2024-05-15_8211488f6520148d312e6b498aa4ff9d_chaos_destroyer_wannacry.exe
1924	2024-05-15_8211488f6520148d312e6b498aa4ff9d_chaos_destroyer_wannacry.exe
2804	svchost.exe
2804	svchost.exe
2804	svchost.exe
2804	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	1924	2024-05-15_8211488f6520148d312e6b498aa4ff9d_chaos_destroyer_wannacry.exe
Token: SeDebugPrivilege	2804	svchost.exe
Token: SeBackupPrivilege	2652	vssvc.exe
Token: SeRestorePrivilege	2652	vssvc.exe
Token: SeAuditPrivilege	2652	vssvc.exe
Token: SeIncreaseQuotaPrivilege	1544	WMIC.exe
Token: SeSecurityPrivilege	1544	WMIC.exe
Token: SeTakeOwnershipPrivilege	1544	WMIC.exe
Token: SeLoadDriverPrivilege	1544	WMIC.exe
Token: SeSystemProfilePrivilege	1544	WMIC.exe
Token: SeSystemtimePrivilege	1544	WMIC.exe
Token: SeProfSingleProcessPrivilege	1544	WMIC.exe
Token: SeIncBasePriorityPrivilege	1544	WMIC.exe
Token: SeCreatePagefilePrivilege	1544	WMIC.exe
Token: SeBackupPrivilege	1544	WMIC.exe
Token: SeRestorePrivilege	1544	WMIC.exe
Token: SeShutdownPrivilege	1544	WMIC.exe
Token: SeDebugPrivilege	1544	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1544	WMIC.exe
Token: SeRemoteShutdownPrivilege	1544	WMIC.exe
Token: SeUndockPrivilege	1544	WMIC.exe
Token: SeManageVolumePrivilege	1544	WMIC.exe
Token: 33	1544	WMIC.exe
Token: 34	1544	WMIC.exe
Token: 35	1544	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1544	WMIC.exe
Token: SeSecurityPrivilege	1544	WMIC.exe
Token: SeTakeOwnershipPrivilege	1544	WMIC.exe
Token: SeLoadDriverPrivilege	1544	WMIC.exe
Token: SeSystemProfilePrivilege	1544	WMIC.exe
Token: SeSystemtimePrivilege	1544	WMIC.exe
Token: SeProfSingleProcessPrivilege	1544	WMIC.exe
Token: SeIncBasePriorityPrivilege	1544	WMIC.exe
Token: SeCreatePagefilePrivilege	1544	WMIC.exe
Token: SeBackupPrivilege	1544	WMIC.exe
Token: SeRestorePrivilege	1544	WMIC.exe
Token: SeShutdownPrivilege	1544	WMIC.exe
Token: SeDebugPrivilege	1544	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1544	WMIC.exe
Token: SeRemoteShutdownPrivilege	1544	WMIC.exe
Token: SeUndockPrivilege	1544	WMIC.exe
Token: SeManageVolumePrivilege	1544	WMIC.exe
Token: 33	1544	WMIC.exe
Token: 34	1544	WMIC.exe
Token: 35	1544	WMIC.exe
Token: SeBackupPrivilege	1608	wbengine.exe
Token: SeRestorePrivilege	1608	wbengine.exe
Token: SeSecurityPrivilege	1608	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1924 wrote to memory of 2804	1924	2024-05-15_8211488f6520148d312e6b498aa4ff9d_chaos_destroyer_wannacry.exe	28
PID 1924 wrote to memory of 2804	1924	2024-05-15_8211488f6520148d312e6b498aa4ff9d_chaos_destroyer_wannacry.exe	28
PID 1924 wrote to memory of 2804	1924	2024-05-15_8211488f6520148d312e6b498aa4ff9d_chaos_destroyer_wannacry.exe	28
PID 2804 wrote to memory of 2144	2804	svchost.exe	30
PID 2804 wrote to memory of 2144	2804	svchost.exe	30
PID 2804 wrote to memory of 2144	2804	svchost.exe	30
PID 2144 wrote to memory of 2648	2144	cmd.exe	32
PID 2144 wrote to memory of 2648	2144	cmd.exe	32
PID 2144 wrote to memory of 2648	2144	cmd.exe	32
PID 2144 wrote to memory of 1544	2144	cmd.exe	35
PID 2144 wrote to memory of 1544	2144	cmd.exe	35
PID 2144 wrote to memory of 1544	2144	cmd.exe	35
PID 2804 wrote to memory of 1336	2804	svchost.exe	37
PID 2804 wrote to memory of 1336	2804	svchost.exe	37
PID 2804 wrote to memory of 1336	2804	svchost.exe	37
PID 1336 wrote to memory of 2028	1336	cmd.exe	39
PID 1336 wrote to memory of 2028	1336	cmd.exe	39
PID 1336 wrote to memory of 2028	1336	cmd.exe	39
PID 1336 wrote to memory of 2016	1336	cmd.exe	40
PID 1336 wrote to memory of 2016	1336	cmd.exe	40
PID 1336 wrote to memory of 2016	1336	cmd.exe	40
PID 2804 wrote to memory of 2040	2804	svchost.exe	41
PID 2804 wrote to memory of 2040	2804	svchost.exe	41
PID 2804 wrote to memory of 2040	2804	svchost.exe	41
PID 2040 wrote to memory of 2992	2040	cmd.exe	43
PID 2040 wrote to memory of 2992	2040	cmd.exe	43
PID 2040 wrote to memory of 2992	2040	cmd.exe	43
PID 2804 wrote to memory of 1772	2804	svchost.exe	47
PID 2804 wrote to memory of 1772	2804	svchost.exe	47
PID 2804 wrote to memory of 1772	2804	svchost.exe	47

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\2024-05-15_8211488f6520148d312e6b498aa4ff9d_chaos_destroyer_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-15_8211488f6520148d312e6b498aa4ff9d_chaos_destroyer_wannacry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1924
- 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)
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2804
- - 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:2144
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:2648
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:1544
- - 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:1336
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2028
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2016
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2040
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:2992
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\README.txt
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:1772

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2652

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1608

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:2188

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:384

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

Indicator Removal

T1070

File Deletion

T1070.004

Credential Access

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

Inhibit System Recovery

T1490

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Downloads

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

Filesize
23KB

MD5
8211488f6520148d312e6b498aa4ff9d

SHA1
99c95c9e010d2e3d512f7c68ff482e1e80262c2b

SHA256
95091becfe2ce086fb66894624637c844ea89fb0076aec5d131c4b5e4f95edfd

SHA512
36060945aceaeef7a084c0f91518daafa7d18361bda51b53ca3ebc09f83b3dc32e626b9216acc755e7b23fa8f34beec3c75ac6436562a678b3b32e0e72d0e4cd

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

Filesize
964B

MD5
4217b8b83ce3c3f70029a056546f8fd0

SHA1
487cdb5733d073a0427418888e8f7070fe782a03

SHA256
7d767e907be373c680d1f7884d779588eb643bebb3f27bf3b5ed4864aa4d8121

SHA512
2a58c99fa52f99c276e27eb98aef2ce1205f16d1e37b7e87eb69e9ecda22b578195a43f1a7f70fead6ba70421abf2f85c917551c191536eaf1f3011d3d24f740

Download Submit
memory/1924-0-0x000007FEF5E63000-0x000007FEF5E64000-memory.dmp

Filesize
4KB

Download
memory/1924-1-0x0000000000DF0000-0x0000000000DFC000-memory.dmp

Filesize
48KB

Download
memory/2804-7-0x00000000011F0000-0x00000000011FC000-memory.dmp

Filesize
48KB

Download
memory/2804-9-0x000007FEF5E60000-0x000007FEF684C000-memory.dmp

Filesize
9.9MB

Download
memory/2804-18-0x000007FEF5E60000-0x000007FEF684C000-memory.dmp

Filesize
9.9MB

Download
memory/2804-452-0x000007FEF5E60000-0x000007FEF684C000-memory.dmp

Filesize
9.9MB

Download