chaos | 474d33e3c9e05aed2bc5f15207134bc72fc4aed18bd89eadbd9712b57d4f9f59

Analysis

max time kernel
654s
max time network
1132s
platform
windows11-21h2_x64
resource
win11-20240802-en
resource tags

arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
submitted
04-10-2024 11:35

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General

Target

AnyDesk.exe
Size

7.2MB
MD5

8f1eaaf77aa07ceb4af188ab50db4ed3
SHA1

15148c0a2044805762d8494600386f49aec07b55
SHA256

4c595e8e612d7663804656ecfb65d3a833e585652ba8f15f486611873420e9a1
SHA512

d8ffa382cb99d3d7a1659a66fe6d586fea42aec9c21243e3d9b03928faf139809a435cb51dd0ec8ca5902b60a3effe8847637751a4075297ca189b4515e1ffcc
SSDEEP

49152:MiZLYKiEYSkVodi19NPftSFwkrJxWxhlMOkj7EqTUOgA37MJ+WftYs:

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: 0.0145 BTC Bitcoin Address: 1Fv8VepbEL9tVmBAzu5zvH8JcLDopUVfoS

Wallets

1Fv8VepbEL9tVmBAzu5zvH8JcLDopUVfoS

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 2 IoCs

resource	yara_rule
behavioral2/memory/2876-1-0x0000000000E00000-0x0000000001536000-memory.dmp	family_chaos
behavioral2/files/0x000100000002aa85-26.dat	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
1172	bcdedit.exe
1920	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
4524	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
2728	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\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\Links\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\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\Recent\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\Documents\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\Libraries\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-661032028-162657920-1226909816-1000\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\OneDrive\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\Accessibility\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Contacts\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\Admin\Pictures\Saved Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Music\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\Public\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\AccountPictures\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\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\Camera Roll\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\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\System Tools\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-1-5-21-661032028-162657920-1226909816-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\dn6zdw3su.jpg"	svchost.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Checks SCSI registry key(s) 3 TTPs 4 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_QEMU&Prod_QEMU_DVD-ROM\4&215468a5&0&010000\FriendlyName	vds.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\DISK&VEN_WDC&PROD_WDS100T2B0A\4&215468A5&0&000000	vds.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\FriendlyName	vds.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CDROM&VEN_QEMU&PROD_QEMU_DVD-ROM\4&215468A5&0&010000	vds.exe

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
3160	vssadmin.exe

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-661032028-162657920-1226909816-1000_Classes\Local Settings\MuiCache	MiniSearchHost.exe
Key created	\REGISTRY\USER\S-1-5-21-661032028-162657920-1226909816-1000_Classes\Local Settings	svchost.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
4700	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2728	svchost.exe

Suspicious behavior: EnumeratesProcesses 39 IoCs

pid	Process
2876	AnyDesk.exe
2876	AnyDesk.exe
2876	AnyDesk.exe
2876	AnyDesk.exe
2876	AnyDesk.exe
2876	AnyDesk.exe
2876	AnyDesk.exe
2876	AnyDesk.exe
2876	AnyDesk.exe
2876	AnyDesk.exe
2876	AnyDesk.exe
2876	AnyDesk.exe
2876	AnyDesk.exe
2876	AnyDesk.exe
2876	AnyDesk.exe
2876	AnyDesk.exe
2876	AnyDesk.exe
2876	AnyDesk.exe
2876	AnyDesk.exe
2728	svchost.exe
2728	svchost.exe
2728	svchost.exe
2728	svchost.exe
2728	svchost.exe
2728	svchost.exe
2728	svchost.exe
2728	svchost.exe
2728	svchost.exe
2728	svchost.exe
2728	svchost.exe
2728	svchost.exe
2728	svchost.exe
2728	svchost.exe
2728	svchost.exe
2728	svchost.exe
2728	svchost.exe
2728	svchost.exe
2728	svchost.exe
2728	svchost.exe

Suspicious use of AdjustPrivilegeToken 50 IoCs

description	pid	Process
Token: SeDebugPrivilege	2876	AnyDesk.exe
Token: SeDebugPrivilege	2728	svchost.exe
Token: SeBackupPrivilege	4592	vssvc.exe
Token: SeRestorePrivilege	4592	vssvc.exe
Token: SeAuditPrivilege	4592	vssvc.exe
Token: SeIncreaseQuotaPrivilege	1608	WMIC.exe
Token: SeSecurityPrivilege	1608	WMIC.exe
Token: SeTakeOwnershipPrivilege	1608	WMIC.exe
Token: SeLoadDriverPrivilege	1608	WMIC.exe
Token: SeSystemProfilePrivilege	1608	WMIC.exe
Token: SeSystemtimePrivilege	1608	WMIC.exe
Token: SeProfSingleProcessPrivilege	1608	WMIC.exe
Token: SeIncBasePriorityPrivilege	1608	WMIC.exe
Token: SeCreatePagefilePrivilege	1608	WMIC.exe
Token: SeBackupPrivilege	1608	WMIC.exe
Token: SeRestorePrivilege	1608	WMIC.exe
Token: SeShutdownPrivilege	1608	WMIC.exe
Token: SeDebugPrivilege	1608	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1608	WMIC.exe
Token: SeRemoteShutdownPrivilege	1608	WMIC.exe
Token: SeUndockPrivilege	1608	WMIC.exe
Token: SeManageVolumePrivilege	1608	WMIC.exe
Token: 33	1608	WMIC.exe
Token: 34	1608	WMIC.exe
Token: 35	1608	WMIC.exe
Token: 36	1608	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1608	WMIC.exe
Token: SeSecurityPrivilege	1608	WMIC.exe
Token: SeTakeOwnershipPrivilege	1608	WMIC.exe
Token: SeLoadDriverPrivilege	1608	WMIC.exe
Token: SeSystemProfilePrivilege	1608	WMIC.exe
Token: SeSystemtimePrivilege	1608	WMIC.exe
Token: SeProfSingleProcessPrivilege	1608	WMIC.exe
Token: SeIncBasePriorityPrivilege	1608	WMIC.exe
Token: SeCreatePagefilePrivilege	1608	WMIC.exe
Token: SeBackupPrivilege	1608	WMIC.exe
Token: SeRestorePrivilege	1608	WMIC.exe
Token: SeShutdownPrivilege	1608	WMIC.exe
Token: SeDebugPrivilege	1608	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1608	WMIC.exe
Token: SeRemoteShutdownPrivilege	1608	WMIC.exe
Token: SeUndockPrivilege	1608	WMIC.exe
Token: SeManageVolumePrivilege	1608	WMIC.exe
Token: 33	1608	WMIC.exe
Token: 34	1608	WMIC.exe
Token: 35	1608	WMIC.exe
Token: 36	1608	WMIC.exe
Token: SeBackupPrivilege	4648	wbengine.exe
Token: SeRestorePrivilege	4648	wbengine.exe
Token: SeSecurityPrivilege	4648	wbengine.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1620	MiniSearchHost.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2876 wrote to memory of 2728	2876	AnyDesk.exe	81
PID 2876 wrote to memory of 2728	2876	AnyDesk.exe	81
PID 2728 wrote to memory of 4660	2728	svchost.exe	82
PID 2728 wrote to memory of 4660	2728	svchost.exe	82
PID 4660 wrote to memory of 3160	4660	cmd.exe	84
PID 4660 wrote to memory of 3160	4660	cmd.exe	84
PID 4660 wrote to memory of 1608	4660	cmd.exe	87
PID 4660 wrote to memory of 1608	4660	cmd.exe	87
PID 2728 wrote to memory of 4980	2728	svchost.exe	89
PID 2728 wrote to memory of 4980	2728	svchost.exe	89
PID 4980 wrote to memory of 1172	4980	cmd.exe	91
PID 4980 wrote to memory of 1172	4980	cmd.exe	91
PID 4980 wrote to memory of 1920	4980	cmd.exe	92
PID 4980 wrote to memory of 1920	4980	cmd.exe	92
PID 2728 wrote to memory of 1968	2728	svchost.exe	93
PID 2728 wrote to memory of 1968	2728	svchost.exe	93
PID 1968 wrote to memory of 4524	1968	cmd.exe	95
PID 1968 wrote to memory of 4524	1968	cmd.exe	95
PID 2728 wrote to memory of 4700	2728	svchost.exe	100
PID 2728 wrote to memory of 4700	2728	svchost.exe	100

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\AnyDesk.exe
"C:\Users\Admin\AppData\Local\Temp\AnyDesk.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2876
- 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
  - Modifies registry class
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2728
- - 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:4660
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:3160
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:1608
- - 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:4980
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1172
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1920
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1968
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:4524
- - 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:4700

C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe
"C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe" -ServerName:MiniSearchUI.AppXj3y73at8fy1htwztzxs68sxx1v7cksp7.mca
1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:1620

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4592

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4648

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:3640

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
- Checks SCSI registry key(s)
PID:2120

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

Peripheral Device Discovery

T1120

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\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\TempState\SearchHoverUnifiedTileModelCache.dat

Filesize
10KB

MD5
10b3e6029bd3f6a7aa99e45f20f8a2bc

SHA1
d66b64a66cef494ad245a641819920e8eaa14daf

SHA256
4c6b6384e84e913c1a9438f427a989579712b102ee876ed862d808190f3f31ba

SHA512
d26980ede9b75952d1348fad852f54fdd5acaa7cb2ccd4a8038c55e1d11bee672bf748f349c06c8ccb5e60cc2c38283c68906b914aeb931c852afc50184db3b0

Download Submit
C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\TempState\SearchHoverUnifiedTileModelCache.dat

Filesize
10KB

MD5
30f9f69bd4cb3ca8ed4af465e6bf3b72

SHA1
1f7bf3625d683c1af38485d1eb39152949648749

SHA256
fbb114871abc3901711a5f204cb370f1cc1602ad89fa0c8155288ec72e4eaf36

SHA512
ae96746716d0b47912c191ca52db48ee40aca9591444c1f0ffbc913346be1fff1e9f71c6e66cb4c175fd308e04a504367dd56bf84920f94c65142cd8508258c2

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

Filesize
7.2MB

MD5
8f1eaaf77aa07ceb4af188ab50db4ed3

SHA1
15148c0a2044805762d8494600386f49aec07b55

SHA256
4c595e8e612d7663804656ecfb65d3a833e585652ba8f15f486611873420e9a1

SHA512
d8ffa382cb99d3d7a1659a66fe6d586fea42aec9c21243e3d9b03928faf139809a435cb51dd0ec8ca5902b60a3effe8847637751a4075297ca189b4515e1ffcc

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

Filesize
953B

MD5
6e12ca86b9124f0bd0bde3bc0dcdd939

SHA1
b6de4262019d53990ef8159a5c191684456fa3c7

SHA256
1e701be7f8ddd4812524a5b89edd0a2e4d6c74ca9407b638d1ad8d7d5ce50b41

SHA512
2132552940f1d6b8c347eadcd92f90a5095156c7be705e454410de69743fa4f717ad58d05b689ed3ed48d5f30e4927c6305be4027bf88b42bc513ac286a836c8

Download Submit
memory/2876-0-0x00007FFFF9AF3000-0x00007FFFF9AF5000-memory.dmp

Filesize
8KB

Download
memory/2876-1-0x0000000000E00000-0x0000000001536000-memory.dmp

Filesize
7.2MB

Download
memory/2876-2-0x00007FFFF9AF3000-0x00007FFFF9AF5000-memory.dmp

Filesize
8KB

Download