chaos | 3cecca399802b3896d151767db73d452b0f062d0e5dcb1c290c49d7eb8fad19c

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
03-11-2024 01:07

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General

Target

af0e24781ed3683f04dd86a616e31490f36c2da4cbb4fddc76efbd0fc4f15d55.exe
Size

3.1MB
MD5

3303698d5190201a3f6dd7f1118251e0
SHA1

b7ef2c81d6ae8023ff811278ec3e5bfba8fd905d
SHA256

af0e24781ed3683f04dd86a616e31490f36c2da4cbb4fddc76efbd0fc4f15d55
SHA512

7ee79e8be71b4f3f7e6c1678e5100484e774d445777adc8f744d782258fad7444a5cd775a8290fdaadd7ab95b3c5fdb2b10e644dc64daa340c770d34151293f4
SSDEEP

24576:0wYAZ9hsTcbVPIw4OEezpOPoZzUt4MKom1W6USf5ZztnE/O/XZ/zhPw:zztbN5pZAJ0fJl8

Score

10^/10

chaos defense_evasion evasion execution impact ransomware spyware stealer

Malware Config

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/596-1-0x0000000000F60000-0x0000000001272000-memory.dmp	family_chaos
behavioral1/files/0x000b00000001227f-5.dat	family_chaos
behavioral1/memory/2900-7-0x00000000010B0000-0x00000000013C2000-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
408	bcdedit.exe
1532	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
1180	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\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

Processes:

svchost.exe

pid	Process
2900	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

Processes:

svchost.exe

description	ioc	Process
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Searches\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\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\Favorites\Links\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\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\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\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\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\Programs\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\Windows\Recent\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\Videos\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-2872745919-2748461613-2989606286-1000\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Desktop\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\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\Contacts\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\Accessories\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\Links\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\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\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-1-5-21-2872745919-2748461613-2989606286-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\o58shcsgu.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
1652	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

Processes:

NOTEPAD.EXE

pid	Process
1976	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

svchost.exe

pid	Process
2900	svchost.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

Processes:

af0e24781ed3683f04dd86a616e31490f36c2da4cbb4fddc76efbd0fc4f15d55.exesvchost.exe

pid	Process
596	af0e24781ed3683f04dd86a616e31490f36c2da4cbb4fddc76efbd0fc4f15d55.exe
596	af0e24781ed3683f04dd86a616e31490f36c2da4cbb4fddc76efbd0fc4f15d55.exe
596	af0e24781ed3683f04dd86a616e31490f36c2da4cbb4fddc76efbd0fc4f15d55.exe
2900	svchost.exe
2900	svchost.exe
2900	svchost.exe
2900	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

af0e24781ed3683f04dd86a616e31490f36c2da4cbb4fddc76efbd0fc4f15d55.exesvchost.exevssvc.exeWMIC.exewbengine.exe

description	pid	Process
Token: SeDebugPrivilege	596	af0e24781ed3683f04dd86a616e31490f36c2da4cbb4fddc76efbd0fc4f15d55.exe
Token: SeDebugPrivilege	2900	svchost.exe
Token: SeBackupPrivilege	2412	vssvc.exe
Token: SeRestorePrivilege	2412	vssvc.exe
Token: SeAuditPrivilege	2412	vssvc.exe
Token: SeIncreaseQuotaPrivilege	2808	WMIC.exe
Token: SeSecurityPrivilege	2808	WMIC.exe
Token: SeTakeOwnershipPrivilege	2808	WMIC.exe
Token: SeLoadDriverPrivilege	2808	WMIC.exe
Token: SeSystemProfilePrivilege	2808	WMIC.exe
Token: SeSystemtimePrivilege	2808	WMIC.exe
Token: SeProfSingleProcessPrivilege	2808	WMIC.exe
Token: SeIncBasePriorityPrivilege	2808	WMIC.exe
Token: SeCreatePagefilePrivilege	2808	WMIC.exe
Token: SeBackupPrivilege	2808	WMIC.exe
Token: SeRestorePrivilege	2808	WMIC.exe
Token: SeShutdownPrivilege	2808	WMIC.exe
Token: SeDebugPrivilege	2808	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2808	WMIC.exe
Token: SeRemoteShutdownPrivilege	2808	WMIC.exe
Token: SeUndockPrivilege	2808	WMIC.exe
Token: SeManageVolumePrivilege	2808	WMIC.exe
Token: 33	2808	WMIC.exe
Token: 34	2808	WMIC.exe
Token: 35	2808	WMIC.exe
Token: SeIncreaseQuotaPrivilege	2808	WMIC.exe
Token: SeSecurityPrivilege	2808	WMIC.exe
Token: SeTakeOwnershipPrivilege	2808	WMIC.exe
Token: SeLoadDriverPrivilege	2808	WMIC.exe
Token: SeSystemProfilePrivilege	2808	WMIC.exe
Token: SeSystemtimePrivilege	2808	WMIC.exe
Token: SeProfSingleProcessPrivilege	2808	WMIC.exe
Token: SeIncBasePriorityPrivilege	2808	WMIC.exe
Token: SeCreatePagefilePrivilege	2808	WMIC.exe
Token: SeBackupPrivilege	2808	WMIC.exe
Token: SeRestorePrivilege	2808	WMIC.exe
Token: SeShutdownPrivilege	2808	WMIC.exe
Token: SeDebugPrivilege	2808	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2808	WMIC.exe
Token: SeRemoteShutdownPrivilege	2808	WMIC.exe
Token: SeUndockPrivilege	2808	WMIC.exe
Token: SeManageVolumePrivilege	2808	WMIC.exe
Token: 33	2808	WMIC.exe
Token: 34	2808	WMIC.exe
Token: 35	2808	WMIC.exe
Token: SeBackupPrivilege	1648	wbengine.exe
Token: SeRestorePrivilege	1648	wbengine.exe
Token: SeSecurityPrivilege	1648	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

af0e24781ed3683f04dd86a616e31490f36c2da4cbb4fddc76efbd0fc4f15d55.exesvchost.execmd.execmd.execmd.exe

description	pid	Process	procid_target
PID 596 wrote to memory of 2900	596	af0e24781ed3683f04dd86a616e31490f36c2da4cbb4fddc76efbd0fc4f15d55.exe	31
PID 596 wrote to memory of 2900	596	af0e24781ed3683f04dd86a616e31490f36c2da4cbb4fddc76efbd0fc4f15d55.exe	31
PID 596 wrote to memory of 2900	596	af0e24781ed3683f04dd86a616e31490f36c2da4cbb4fddc76efbd0fc4f15d55.exe	31
PID 2900 wrote to memory of 1664	2900	svchost.exe	33
PID 2900 wrote to memory of 1664	2900	svchost.exe	33
PID 2900 wrote to memory of 1664	2900	svchost.exe	33
PID 1664 wrote to memory of 1652	1664	cmd.exe	35
PID 1664 wrote to memory of 1652	1664	cmd.exe	35
PID 1664 wrote to memory of 1652	1664	cmd.exe	35
PID 1664 wrote to memory of 2808	1664	cmd.exe	38
PID 1664 wrote to memory of 2808	1664	cmd.exe	38
PID 1664 wrote to memory of 2808	1664	cmd.exe	38
PID 2900 wrote to memory of 956	2900	svchost.exe	40
PID 2900 wrote to memory of 956	2900	svchost.exe	40
PID 2900 wrote to memory of 956	2900	svchost.exe	40
PID 956 wrote to memory of 408	956	cmd.exe	42
PID 956 wrote to memory of 408	956	cmd.exe	42
PID 956 wrote to memory of 408	956	cmd.exe	42
PID 956 wrote to memory of 1532	956	cmd.exe	43
PID 956 wrote to memory of 1532	956	cmd.exe	43
PID 956 wrote to memory of 1532	956	cmd.exe	43
PID 2900 wrote to memory of 2928	2900	svchost.exe	44
PID 2900 wrote to memory of 2928	2900	svchost.exe	44
PID 2900 wrote to memory of 2928	2900	svchost.exe	44
PID 2928 wrote to memory of 1180	2928	cmd.exe	46
PID 2928 wrote to memory of 1180	2928	cmd.exe	46
PID 2928 wrote to memory of 1180	2928	cmd.exe	46
PID 2900 wrote to memory of 1976	2900	svchost.exe	50
PID 2900 wrote to memory of 1976	2900	svchost.exe	50
PID 2900 wrote to memory of 1976	2900	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\af0e24781ed3683f04dd86a616e31490f36c2da4cbb4fddc76efbd0fc4f15d55.exe
"C:\Users\Admin\AppData\Local\Temp\af0e24781ed3683f04dd86a616e31490f36c2da4cbb4fddc76efbd0fc4f15d55.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:596
- 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:2900
- - 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:1664
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:1652
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:2808
- - 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:956
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:408
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1532
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2928
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:1180
- - 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:1976

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2412

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1648

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:2796

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:1708

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
3.1MB

MD5
3303698d5190201a3f6dd7f1118251e0

SHA1
b7ef2c81d6ae8023ff811278ec3e5bfba8fd905d

SHA256
af0e24781ed3683f04dd86a616e31490f36c2da4cbb4fddc76efbd0fc4f15d55

SHA512
7ee79e8be71b4f3f7e6c1678e5100484e774d445777adc8f744d782258fad7444a5cd775a8290fdaadd7ab95b3c5fdb2b10e644dc64daa340c770d34151293f4

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

Filesize
507B

MD5
01da9388394d86f1e626ce4d08f3bebb

SHA1
3ceff3e1ea38d0f0df2f5906bdbe79180a230cc4

SHA256
a9108d9c95ebf0024ecd27e8ce34f6439c2f74b5c63917af83e150c9b45ef1a2

SHA512
e234f02dab37026a9bd0b926c1a6e475116954dc00276ec4fe6ea8dead178cf1bb292afa27bf7d60f88247904399c8f986b2a040b1313c30028b85c4bbd7eec2

Download Submit
memory/596-0-0x000007FEF5BD3000-0x000007FEF5BD4000-memory.dmp

Filesize
4KB

Download
memory/596-1-0x0000000000F60000-0x0000000001272000-memory.dmp

Filesize
3.1MB

Download
memory/2900-7-0x00000000010B0000-0x00000000013C2000-memory.dmp

Filesize
3.1MB

Download
memory/2900-31-0x000007FEF51E0000-0x000007FEF5BCC000-memory.dmp

Filesize
9.9MB

Download
memory/2900-482-0x000007FEF51E3000-0x000007FEF51E4000-memory.dmp

Filesize
4KB

Download
memory/2900-483-0x000007FEF51E0000-0x000007FEF5BCC000-memory.dmp

Filesize
9.9MB

Download