chaos | b6176e42f8eece315692fa7ec9a37190f1ec8353fc85a7b1042af4b06f1f489e

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
26-01-2025 11:01

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General

Target

ratbuildransomware.exe
Size

23KB
MD5

0a1c74e456d2f946369080f5a46b79c0
SHA1

3a11cf17c826247034f12b63362ee597681a37ca
SHA256

b6176e42f8eece315692fa7ec9a37190f1ec8353fc85a7b1042af4b06f1f489e
SHA512

27133929dafc8c5abc954baa3491c603dbaa866155ebf32d25860ec0da879a024e6207767943bae36e2b8faaeac7f7a52d254b8f26e0bd17ef747c3c6d2db963
SSDEEP

384:b3MLWHn3kIef/ZXRtLWW3pXHVYILpJrr91CzxbeteT:Hn3kIcpj3pXHVY0nrr9ixbYeT

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: $35 USD Bitcoin Address: bc1qau23yqew650myzt5xatzkcl2seeefjs5v9t94r

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 3 IoCs

resource	yara_rule
behavioral1/memory/2736-1-0x00000000010B0000-0x00000000010BC000-memory.dmp	family_chaos
behavioral1/files/0x0007000000012117-5.dat	family_chaos
behavioral1/memory/2548-7-0x00000000001F0000-0x00000000001FC000-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
1888	bcdedit.exe
1860	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
2944	wbadmin.exe

Drops startup file 3 IoCs

description	ioc	Process
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
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.url	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2548	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\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\Maintenance\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\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\Downloads\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\User Pinned\TaskBar\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\Accessories\Accessibility\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\Admin\Desktop\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\Windows\SendTo\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Videos\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-3063565911-2056067323-3330884624-1000\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\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\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System 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\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\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\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\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\Searches\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\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 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
380	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
1020	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2548	svchost.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2736	ratbuildransomware.exe
2736	ratbuildransomware.exe
2548	svchost.exe
2548	svchost.exe
2548	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	2736	ratbuildransomware.exe
Token: SeDebugPrivilege	2548	svchost.exe
Token: SeBackupPrivilege	872	vssvc.exe
Token: SeRestorePrivilege	872	vssvc.exe
Token: SeAuditPrivilege	872	vssvc.exe
Token: SeIncreaseQuotaPrivilege	1912	WMIC.exe
Token: SeSecurityPrivilege	1912	WMIC.exe
Token: SeTakeOwnershipPrivilege	1912	WMIC.exe
Token: SeLoadDriverPrivilege	1912	WMIC.exe
Token: SeSystemProfilePrivilege	1912	WMIC.exe
Token: SeSystemtimePrivilege	1912	WMIC.exe
Token: SeProfSingleProcessPrivilege	1912	WMIC.exe
Token: SeIncBasePriorityPrivilege	1912	WMIC.exe
Token: SeCreatePagefilePrivilege	1912	WMIC.exe
Token: SeBackupPrivilege	1912	WMIC.exe
Token: SeRestorePrivilege	1912	WMIC.exe
Token: SeShutdownPrivilege	1912	WMIC.exe
Token: SeDebugPrivilege	1912	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1912	WMIC.exe
Token: SeRemoteShutdownPrivilege	1912	WMIC.exe
Token: SeUndockPrivilege	1912	WMIC.exe
Token: SeManageVolumePrivilege	1912	WMIC.exe
Token: 33	1912	WMIC.exe
Token: 34	1912	WMIC.exe
Token: 35	1912	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1912	WMIC.exe
Token: SeSecurityPrivilege	1912	WMIC.exe
Token: SeTakeOwnershipPrivilege	1912	WMIC.exe
Token: SeLoadDriverPrivilege	1912	WMIC.exe
Token: SeSystemProfilePrivilege	1912	WMIC.exe
Token: SeSystemtimePrivilege	1912	WMIC.exe
Token: SeProfSingleProcessPrivilege	1912	WMIC.exe
Token: SeIncBasePriorityPrivilege	1912	WMIC.exe
Token: SeCreatePagefilePrivilege	1912	WMIC.exe
Token: SeBackupPrivilege	1912	WMIC.exe
Token: SeRestorePrivilege	1912	WMIC.exe
Token: SeShutdownPrivilege	1912	WMIC.exe
Token: SeDebugPrivilege	1912	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1912	WMIC.exe
Token: SeRemoteShutdownPrivilege	1912	WMIC.exe
Token: SeUndockPrivilege	1912	WMIC.exe
Token: SeManageVolumePrivilege	1912	WMIC.exe
Token: 33	1912	WMIC.exe
Token: 34	1912	WMIC.exe
Token: 35	1912	WMIC.exe
Token: SeBackupPrivilege	2904	wbengine.exe
Token: SeRestorePrivilege	2904	wbengine.exe
Token: SeSecurityPrivilege	2904	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2736 wrote to memory of 2548	2736	ratbuildransomware.exe	28
PID 2736 wrote to memory of 2548	2736	ratbuildransomware.exe	28
PID 2736 wrote to memory of 2548	2736	ratbuildransomware.exe	28
PID 2548 wrote to memory of 2996	2548	svchost.exe	29
PID 2548 wrote to memory of 2996	2548	svchost.exe	29
PID 2548 wrote to memory of 2996	2548	svchost.exe	29
PID 2996 wrote to memory of 380	2996	cmd.exe	31
PID 2996 wrote to memory of 380	2996	cmd.exe	31
PID 2996 wrote to memory of 380	2996	cmd.exe	31
PID 2996 wrote to memory of 1912	2996	cmd.exe	35
PID 2996 wrote to memory of 1912	2996	cmd.exe	35
PID 2996 wrote to memory of 1912	2996	cmd.exe	35
PID 2548 wrote to memory of 2964	2548	svchost.exe	37
PID 2548 wrote to memory of 2964	2548	svchost.exe	37
PID 2548 wrote to memory of 2964	2548	svchost.exe	37
PID 2964 wrote to memory of 1888	2964	cmd.exe	39
PID 2964 wrote to memory of 1888	2964	cmd.exe	39
PID 2964 wrote to memory of 1888	2964	cmd.exe	39
PID 2964 wrote to memory of 1860	2964	cmd.exe	40
PID 2964 wrote to memory of 1860	2964	cmd.exe	40
PID 2964 wrote to memory of 1860	2964	cmd.exe	40
PID 2548 wrote to memory of 1872	2548	svchost.exe	41
PID 2548 wrote to memory of 1872	2548	svchost.exe	41
PID 2548 wrote to memory of 1872	2548	svchost.exe	41
PID 1872 wrote to memory of 2944	1872	cmd.exe	43
PID 1872 wrote to memory of 2944	1872	cmd.exe	43
PID 1872 wrote to memory of 2944	1872	cmd.exe	43
PID 2548 wrote to memory of 1020	2548	svchost.exe	47
PID 2548 wrote to memory of 1020	2548	svchost.exe	47
PID 2548 wrote to memory of 1020	2548	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\ratbuildransomware.exe
"C:\Users\Admin\AppData\Local\Temp\ratbuildransomware.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2736
- 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:2548
- - 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:2996
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:380
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:1912
- - 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:2964
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1888
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1860
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1872
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:2944
- - 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:1020

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:872

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2904

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:2284

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:2264

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

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

Inhibit System Recovery

T1490

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Downloads

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

Filesize
23KB

MD5
0a1c74e456d2f946369080f5a46b79c0

SHA1
3a11cf17c826247034f12b63362ee597681a37ca

SHA256
b6176e42f8eece315692fa7ec9a37190f1ec8353fc85a7b1042af4b06f1f489e

SHA512
27133929dafc8c5abc954baa3491c603dbaa866155ebf32d25860ec0da879a024e6207767943bae36e2b8faaeac7f7a52d254b8f26e0bd17ef747c3c6d2db963

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

Filesize
956B

MD5
c3559ef93c3ada6ec311f111a8868628

SHA1
df773a84993baa251107544a8748982f655fc5f3

SHA256
17c1ec0d1cd64a069e664be4aee72fbdad3c83049b405367f3b22be158d0d180

SHA512
7e085ca1708fbe4049002375061e31c621eea6d5d210788f5efaf890d498464d97c6fd6980684dd8f8e60f1642f4c151411841c97c6468f80cf7bb5ec5eed82a

Download Submit
memory/2548-7-0x00000000001F0000-0x00000000001FC000-memory.dmp

Filesize
48KB

Download
memory/2548-56-0x000007FEF5690000-0x000007FEF607C000-memory.dmp

Filesize
9.9MB

Download
memory/2548-71-0x000007FEF5690000-0x000007FEF607C000-memory.dmp

Filesize
9.9MB

Download
memory/2548-72-0x000007FEF5690000-0x000007FEF607C000-memory.dmp

Filesize
9.9MB

Download
memory/2736-0-0x000007FEF5693000-0x000007FEF5694000-memory.dmp

Filesize
4KB

Download
memory/2736-1-0x00000000010B0000-0x00000000010BC000-memory.dmp

Filesize
48KB

Download