chaos | 4c595e8e612d7663804656ecfb65d3a833e585652ba8f15f486611873420e9a1

Analysis

max time kernel
77s
max time network
20s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
02-11-2024 16:24

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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 3 IoCs

resource	yara_rule
behavioral1/memory/2580-1-0x0000000001160000-0x0000000001896000-memory.dmp	family_chaos
behavioral1/files/0x0031000000018bbf-6.dat	family_chaos
behavioral1/memory/2704-8-0x0000000000AB0000-0x00000000011E6000-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
2400	bcdedit.exe
2408	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
1424	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
2704	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\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\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\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\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\Administrative 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\Public\Videos\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\Documents\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\Maintenance\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\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\Desktop\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\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	F:\$RECYCLE.BIN\S-1-5-21-3692679935-4019334568-335155002-1000\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Saved Games\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\AppData\Roaming\Microsoft\Windows\Libraries\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\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\desktop.ini	svchost.exe

Sets desktop wallpaper using registry 2 TTPs 2 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\\tvrnc8th4.jpg"	svchost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\Pictures\\My Wallpaper.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
2488	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
1572	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2704	svchost.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2580	AnyDesk.exe
2704	svchost.exe
2704	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	2580	AnyDesk.exe
Token: SeDebugPrivilege	2704	svchost.exe
Token: SeBackupPrivilege	1012	vssvc.exe
Token: SeRestorePrivilege	1012	vssvc.exe
Token: SeAuditPrivilege	1012	vssvc.exe
Token: SeIncreaseQuotaPrivilege	2500	WMIC.exe
Token: SeSecurityPrivilege	2500	WMIC.exe
Token: SeTakeOwnershipPrivilege	2500	WMIC.exe
Token: SeLoadDriverPrivilege	2500	WMIC.exe
Token: SeSystemProfilePrivilege	2500	WMIC.exe
Token: SeSystemtimePrivilege	2500	WMIC.exe
Token: SeProfSingleProcessPrivilege	2500	WMIC.exe
Token: SeIncBasePriorityPrivilege	2500	WMIC.exe
Token: SeCreatePagefilePrivilege	2500	WMIC.exe
Token: SeBackupPrivilege	2500	WMIC.exe
Token: SeRestorePrivilege	2500	WMIC.exe
Token: SeShutdownPrivilege	2500	WMIC.exe
Token: SeDebugPrivilege	2500	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2500	WMIC.exe
Token: SeRemoteShutdownPrivilege	2500	WMIC.exe
Token: SeUndockPrivilege	2500	WMIC.exe
Token: SeManageVolumePrivilege	2500	WMIC.exe
Token: 33	2500	WMIC.exe
Token: 34	2500	WMIC.exe
Token: 35	2500	WMIC.exe
Token: SeIncreaseQuotaPrivilege	2500	WMIC.exe
Token: SeSecurityPrivilege	2500	WMIC.exe
Token: SeTakeOwnershipPrivilege	2500	WMIC.exe
Token: SeLoadDriverPrivilege	2500	WMIC.exe
Token: SeSystemProfilePrivilege	2500	WMIC.exe
Token: SeSystemtimePrivilege	2500	WMIC.exe
Token: SeProfSingleProcessPrivilege	2500	WMIC.exe
Token: SeIncBasePriorityPrivilege	2500	WMIC.exe
Token: SeCreatePagefilePrivilege	2500	WMIC.exe
Token: SeBackupPrivilege	2500	WMIC.exe
Token: SeRestorePrivilege	2500	WMIC.exe
Token: SeShutdownPrivilege	2500	WMIC.exe
Token: SeDebugPrivilege	2500	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2500	WMIC.exe
Token: SeRemoteShutdownPrivilege	2500	WMIC.exe
Token: SeUndockPrivilege	2500	WMIC.exe
Token: SeManageVolumePrivilege	2500	WMIC.exe
Token: 33	2500	WMIC.exe
Token: 34	2500	WMIC.exe
Token: 35	2500	WMIC.exe
Token: SeBackupPrivilege	1760	wbengine.exe
Token: SeRestorePrivilege	1760	wbengine.exe
Token: SeSecurityPrivilege	1760	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2580 wrote to memory of 2704	2580	AnyDesk.exe	29
PID 2580 wrote to memory of 2704	2580	AnyDesk.exe	29
PID 2580 wrote to memory of 2704	2580	AnyDesk.exe	29
PID 2704 wrote to memory of 1228	2704	svchost.exe	31
PID 2704 wrote to memory of 1228	2704	svchost.exe	31
PID 2704 wrote to memory of 1228	2704	svchost.exe	31
PID 1228 wrote to memory of 2488	1228	cmd.exe	33
PID 1228 wrote to memory of 2488	1228	cmd.exe	33
PID 1228 wrote to memory of 2488	1228	cmd.exe	33
PID 1228 wrote to memory of 2500	1228	cmd.exe	36
PID 1228 wrote to memory of 2500	1228	cmd.exe	36
PID 1228 wrote to memory of 2500	1228	cmd.exe	36
PID 2704 wrote to memory of 2416	2704	svchost.exe	38
PID 2704 wrote to memory of 2416	2704	svchost.exe	38
PID 2704 wrote to memory of 2416	2704	svchost.exe	38
PID 2416 wrote to memory of 2400	2416	cmd.exe	40
PID 2416 wrote to memory of 2400	2416	cmd.exe	40
PID 2416 wrote to memory of 2400	2416	cmd.exe	40
PID 2416 wrote to memory of 2408	2416	cmd.exe	41
PID 2416 wrote to memory of 2408	2416	cmd.exe	41
PID 2416 wrote to memory of 2408	2416	cmd.exe	41
PID 2704 wrote to memory of 288	2704	svchost.exe	42
PID 2704 wrote to memory of 288	2704	svchost.exe	42
PID 2704 wrote to memory of 288	2704	svchost.exe	42
PID 288 wrote to memory of 1424	288	cmd.exe	44
PID 288 wrote to memory of 1424	288	cmd.exe	44
PID 288 wrote to memory of 1424	288	cmd.exe	44
PID 2704 wrote to memory of 1572	2704	svchost.exe	48
PID 2704 wrote to memory of 1572	2704	svchost.exe	48
PID 2704 wrote to memory of 1572	2704	svchost.exe	48

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:2580
- 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:2704
- - 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:1228
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:2488
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:2500
- - 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:2416
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2400
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2408
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:288
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:1424
- - 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:1572

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1012

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1760

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:1672

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:1408

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
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/2580-0-0x000007FEF6253000-0x000007FEF6254000-memory.dmp

Filesize
4KB

Download
memory/2580-1-0x0000000001160000-0x0000000001896000-memory.dmp

Filesize
7.2MB

Download
memory/2580-2-0x000007FEF6253000-0x000007FEF6254000-memory.dmp

Filesize
4KB

Download
memory/2704-8-0x0000000000AB0000-0x00000000011E6000-memory.dmp

Filesize
7.2MB

Download
memory/2704-9-0x000007FEF6250000-0x000007FEF6C3C000-memory.dmp

Filesize
9.9MB

Download
memory/2704-70-0x000007FEF6250000-0x000007FEF6C3C000-memory.dmp

Filesize
9.9MB

Download
memory/2704-75-0x000007FEF6250000-0x000007FEF6C3C000-memory.dmp

Filesize
9.9MB

Download
memory/2704-76-0x000007FEF6250000-0x000007FEF6C3C000-memory.dmp

Filesize
9.9MB

Download