chaos | bf76b90ef05d9803928ad28e996e04d31e9e1bec2a25c5559fe757377c9f6889

Analysis

max time kernel
122s
max time network
126s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
27-10-2024 18:47

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General

Target

214124.exe
Size

1.1MB
MD5

7e623918202ace1a7a9109e54687bc0d
SHA1

d7451f2064c03a412dc93034e917b476c89e12c8
SHA256

bf76b90ef05d9803928ad28e996e04d31e9e1bec2a25c5559fe757377c9f6889
SHA512

0a4f16379fe39e6749ea78518408b55b33bdb08008770b7c03aae42410b9257dfe3ef32588c8d989fa0c7491412bacbba918bb3e0d4a13c008c808b696239386
SSDEEP

24576:zYfQfi/dapoD2THtjPXfR7vn0UqayT+CvO6zZ2EPvwHQ:Pc85lv0UqayTPO6xPvww

Score

10^/10

chaos defense_evasion evasion execution impact ransomware spyware stealer

Malware Config

Extracted

Path

C:\Users\Admin\Documents\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: 0,000015 BTC Bitcoin Address: bc1q7njx7z489vx9444agzf759u4q46vfgtydzwyll dont try to do something stupid or else i will send all of your photos to your friends,family,coworkers and send the virus to them too.

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 3 IoCs

resource	yara_rule
behavioral1/memory/2332-1-0x0000000000E40000-0x0000000000E50000-memory.dmp	family_chaos
behavioral1/files/0x0009000000016ace-5.dat	family_chaos
behavioral1/memory/2300-7-0x0000000000C00000-0x0000000000C10000-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
1548	bcdedit.exe
2432	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
2400	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
2300	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\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\AppData\Roaming\Microsoft\Windows\SendTo\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\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\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\Accessibility\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\Pictures\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\Start Menu\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\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\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\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
File opened for modification	C:\Users\Public\Music\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\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Searches\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\Admin\Contacts\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\System Tools\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Desktop\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\Pictures\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\\kruwj19ob.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
2280	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
2116	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2300	svchost.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
2332	214124.exe
2332	214124.exe
2332	214124.exe
2300	svchost.exe
2300	svchost.exe
2300	svchost.exe
2300	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	2332	214124.exe
Token: SeDebugPrivilege	2300	svchost.exe
Token: SeBackupPrivilege	1608	vssvc.exe
Token: SeRestorePrivilege	1608	vssvc.exe
Token: SeAuditPrivilege	1608	vssvc.exe
Token: SeIncreaseQuotaPrivilege	2440	WMIC.exe
Token: SeSecurityPrivilege	2440	WMIC.exe
Token: SeTakeOwnershipPrivilege	2440	WMIC.exe
Token: SeLoadDriverPrivilege	2440	WMIC.exe
Token: SeSystemProfilePrivilege	2440	WMIC.exe
Token: SeSystemtimePrivilege	2440	WMIC.exe
Token: SeProfSingleProcessPrivilege	2440	WMIC.exe
Token: SeIncBasePriorityPrivilege	2440	WMIC.exe
Token: SeCreatePagefilePrivilege	2440	WMIC.exe
Token: SeBackupPrivilege	2440	WMIC.exe
Token: SeRestorePrivilege	2440	WMIC.exe
Token: SeShutdownPrivilege	2440	WMIC.exe
Token: SeDebugPrivilege	2440	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2440	WMIC.exe
Token: SeRemoteShutdownPrivilege	2440	WMIC.exe
Token: SeUndockPrivilege	2440	WMIC.exe
Token: SeManageVolumePrivilege	2440	WMIC.exe
Token: 33	2440	WMIC.exe
Token: 34	2440	WMIC.exe
Token: 35	2440	WMIC.exe
Token: SeIncreaseQuotaPrivilege	2440	WMIC.exe
Token: SeSecurityPrivilege	2440	WMIC.exe
Token: SeTakeOwnershipPrivilege	2440	WMIC.exe
Token: SeLoadDriverPrivilege	2440	WMIC.exe
Token: SeSystemProfilePrivilege	2440	WMIC.exe
Token: SeSystemtimePrivilege	2440	WMIC.exe
Token: SeProfSingleProcessPrivilege	2440	WMIC.exe
Token: SeIncBasePriorityPrivilege	2440	WMIC.exe
Token: SeCreatePagefilePrivilege	2440	WMIC.exe
Token: SeBackupPrivilege	2440	WMIC.exe
Token: SeRestorePrivilege	2440	WMIC.exe
Token: SeShutdownPrivilege	2440	WMIC.exe
Token: SeDebugPrivilege	2440	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2440	WMIC.exe
Token: SeRemoteShutdownPrivilege	2440	WMIC.exe
Token: SeUndockPrivilege	2440	WMIC.exe
Token: SeManageVolumePrivilege	2440	WMIC.exe
Token: 33	2440	WMIC.exe
Token: 34	2440	WMIC.exe
Token: 35	2440	WMIC.exe
Token: SeBackupPrivilege	836	wbengine.exe
Token: SeRestorePrivilege	836	wbengine.exe
Token: SeSecurityPrivilege	836	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2332 wrote to memory of 2300	2332	214124.exe	31
PID 2332 wrote to memory of 2300	2332	214124.exe	31
PID 2332 wrote to memory of 2300	2332	214124.exe	31
PID 2300 wrote to memory of 2200	2300	svchost.exe	34
PID 2300 wrote to memory of 2200	2300	svchost.exe	34
PID 2300 wrote to memory of 2200	2300	svchost.exe	34
PID 2200 wrote to memory of 2280	2200	cmd.exe	36
PID 2200 wrote to memory of 2280	2200	cmd.exe	36
PID 2200 wrote to memory of 2280	2200	cmd.exe	36
PID 2200 wrote to memory of 2440	2200	cmd.exe	39
PID 2200 wrote to memory of 2440	2200	cmd.exe	39
PID 2200 wrote to memory of 2440	2200	cmd.exe	39
PID 2300 wrote to memory of 764	2300	svchost.exe	41
PID 2300 wrote to memory of 764	2300	svchost.exe	41
PID 2300 wrote to memory of 764	2300	svchost.exe	41
PID 764 wrote to memory of 1548	764	cmd.exe	43
PID 764 wrote to memory of 1548	764	cmd.exe	43
PID 764 wrote to memory of 1548	764	cmd.exe	43
PID 764 wrote to memory of 2432	764	cmd.exe	44
PID 764 wrote to memory of 2432	764	cmd.exe	44
PID 764 wrote to memory of 2432	764	cmd.exe	44
PID 2300 wrote to memory of 1708	2300	svchost.exe	45
PID 2300 wrote to memory of 1708	2300	svchost.exe	45
PID 2300 wrote to memory of 1708	2300	svchost.exe	45
PID 1708 wrote to memory of 2400	1708	cmd.exe	47
PID 1708 wrote to memory of 2400	1708	cmd.exe	47
PID 1708 wrote to memory of 2400	1708	cmd.exe	47
PID 2300 wrote to memory of 2116	2300	svchost.exe	51
PID 2300 wrote to memory of 2116	2300	svchost.exe	51
PID 2300 wrote to memory of 2116	2300	svchost.exe	51

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\214124.exe
"C:\Users\Admin\AppData\Local\Temp\214124.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2332
- 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:2300
- - 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:2200
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:2280
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:2440
- - 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:764
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1548
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2432
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1708
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:2400
- - 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:2116

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

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:836

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:2480

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:2344

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
1.1MB

MD5
7e623918202ace1a7a9109e54687bc0d

SHA1
d7451f2064c03a412dc93034e917b476c89e12c8

SHA256
bf76b90ef05d9803928ad28e996e04d31e9e1bec2a25c5559fe757377c9f6889

SHA512
0a4f16379fe39e6749ea78518408b55b33bdb08008770b7c03aae42410b9257dfe3ef32588c8d989fa0c7491412bacbba918bb3e0d4a13c008c808b696239386

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

Filesize
1KB

MD5
764d90794eb3ba9cbd55ec64c3b3cafc

SHA1
8dd80a1d19452c3654cd69d4b70f13bcf44cdd26

SHA256
0d3e33bd44d976926ec608ec78c03998750e91e8c6d8ea6f7192fd33221735dc

SHA512
589ed190a76d2c5adaa1083b9cee77d913766d566d66fb08b8be0ab83e6a163beafa31139781c73c465d1f437b935b04d2172d0f053a0ef622fd34807e367e75

Download Submit
memory/2300-7-0x0000000000C00000-0x0000000000C10000-memory.dmp

Filesize
64KB

Download
memory/2300-9-0x000007FEF5830000-0x000007FEF621C000-memory.dmp

Filesize
9.9MB

Download
memory/2300-13-0x000007FEF5830000-0x000007FEF621C000-memory.dmp

Filesize
9.9MB

Download
memory/2300-451-0x000007FEF5830000-0x000007FEF621C000-memory.dmp

Filesize
9.9MB

Download
memory/2300-466-0x000007FEF5830000-0x000007FEF621C000-memory.dmp

Filesize
9.9MB

Download
memory/2332-0-0x000007FEF5833000-0x000007FEF5834000-memory.dmp

Filesize
4KB

Download
memory/2332-1-0x0000000000E40000-0x0000000000E50000-memory.dmp

Filesize
64KB

Download