chaos | 773b5fc4a8f79c7d1fdc9e2c79cf92f67257292da3ab4c6f5551f3308fa84fa0

Analysis

max time kernel
23s
max time network
19s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
10-02-2025 22:28

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General

Target

aggresive ransomware.exe
Size

274KB
MD5

a1312968ec68e2fd87b0a4652dba511a
SHA1

153e3ae7cc6d8d38ca8d1ef805b51f90dcdc53e1
SHA256

773b5fc4a8f79c7d1fdc9e2c79cf92f67257292da3ab4c6f5551f3308fa84fa0
SHA512

b65191bf7b8e6aa165ed9c37189fd5b13c3f6a5803b01de0329ea8898078bcb8a1d5cd821a8f60951ba18bfd87a2f380867c1a8b1b1ec89129239b7057f2d623
SSDEEP

6144:gr9i0ME2RQVQW4cGl8yK7dJ+/UIPzHgv26UT8:e92RQVQW4cGl8y2T+/BPzAv26UT8

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

resource	yara_rule
behavioral1/memory/2376-1-0x0000000000F60000-0x0000000000FAA000-memory.dmp	family_chaos
behavioral1/files/0x000a000000012254-5.dat	family_chaos
behavioral1/memory/2860-7-0x0000000000BF0000-0x0000000000C3A000-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
2036	bcdedit.exe
1752	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
2180	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 me .txt	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2860	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	F:\$RECYCLE.BIN\S-1-5-21-3692679935-4019334568-335155002-1000\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\Start Menu\Programs\Accessories\Accessibility\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\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\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\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\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\Public\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\Programs\Accessories\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\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\Videos\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\Start Menu\Programs\Maintenance\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\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\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\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\Admin\Saved Games\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\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\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\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\\4l8fb47he.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
2360	vssadmin.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2860	svchost.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2376	aggresive ransomware.exe
2860	svchost.exe
2860	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	2376	aggresive ransomware.exe
Token: SeDebugPrivilege	2860	svchost.exe
Token: SeBackupPrivilege	1756	vssvc.exe
Token: SeRestorePrivilege	1756	vssvc.exe
Token: SeAuditPrivilege	1756	vssvc.exe
Token: SeIncreaseQuotaPrivilege	2924	WMIC.exe
Token: SeSecurityPrivilege	2924	WMIC.exe
Token: SeTakeOwnershipPrivilege	2924	WMIC.exe
Token: SeLoadDriverPrivilege	2924	WMIC.exe
Token: SeSystemProfilePrivilege	2924	WMIC.exe
Token: SeSystemtimePrivilege	2924	WMIC.exe
Token: SeProfSingleProcessPrivilege	2924	WMIC.exe
Token: SeIncBasePriorityPrivilege	2924	WMIC.exe
Token: SeCreatePagefilePrivilege	2924	WMIC.exe
Token: SeBackupPrivilege	2924	WMIC.exe
Token: SeRestorePrivilege	2924	WMIC.exe
Token: SeShutdownPrivilege	2924	WMIC.exe
Token: SeDebugPrivilege	2924	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2924	WMIC.exe
Token: SeRemoteShutdownPrivilege	2924	WMIC.exe
Token: SeUndockPrivilege	2924	WMIC.exe
Token: SeManageVolumePrivilege	2924	WMIC.exe
Token: 33	2924	WMIC.exe
Token: 34	2924	WMIC.exe
Token: 35	2924	WMIC.exe
Token: SeIncreaseQuotaPrivilege	2924	WMIC.exe
Token: SeSecurityPrivilege	2924	WMIC.exe
Token: SeTakeOwnershipPrivilege	2924	WMIC.exe
Token: SeLoadDriverPrivilege	2924	WMIC.exe
Token: SeSystemProfilePrivilege	2924	WMIC.exe
Token: SeSystemtimePrivilege	2924	WMIC.exe
Token: SeProfSingleProcessPrivilege	2924	WMIC.exe
Token: SeIncBasePriorityPrivilege	2924	WMIC.exe
Token: SeCreatePagefilePrivilege	2924	WMIC.exe
Token: SeBackupPrivilege	2924	WMIC.exe
Token: SeRestorePrivilege	2924	WMIC.exe
Token: SeShutdownPrivilege	2924	WMIC.exe
Token: SeDebugPrivilege	2924	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2924	WMIC.exe
Token: SeRemoteShutdownPrivilege	2924	WMIC.exe
Token: SeUndockPrivilege	2924	WMIC.exe
Token: SeManageVolumePrivilege	2924	WMIC.exe
Token: 33	2924	WMIC.exe
Token: 34	2924	WMIC.exe
Token: 35	2924	WMIC.exe
Token: SeBackupPrivilege	1748	wbengine.exe
Token: SeRestorePrivilege	1748	wbengine.exe
Token: SeSecurityPrivilege	1748	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2376 wrote to memory of 2860	2376	aggresive ransomware.exe	29
PID 2376 wrote to memory of 2860	2376	aggresive ransomware.exe	29
PID 2376 wrote to memory of 2860	2376	aggresive ransomware.exe	29
PID 2860 wrote to memory of 2548	2860	svchost.exe	31
PID 2860 wrote to memory of 2548	2860	svchost.exe	31
PID 2860 wrote to memory of 2548	2860	svchost.exe	31
PID 2548 wrote to memory of 2360	2548	cmd.exe	33
PID 2548 wrote to memory of 2360	2548	cmd.exe	33
PID 2548 wrote to memory of 2360	2548	cmd.exe	33
PID 2548 wrote to memory of 2924	2548	cmd.exe	36
PID 2548 wrote to memory of 2924	2548	cmd.exe	36
PID 2548 wrote to memory of 2924	2548	cmd.exe	36
PID 2860 wrote to memory of 3068	2860	svchost.exe	38
PID 2860 wrote to memory of 3068	2860	svchost.exe	38
PID 2860 wrote to memory of 3068	2860	svchost.exe	38
PID 3068 wrote to memory of 2036	3068	cmd.exe	40
PID 3068 wrote to memory of 2036	3068	cmd.exe	40
PID 3068 wrote to memory of 2036	3068	cmd.exe	40
PID 3068 wrote to memory of 1752	3068	cmd.exe	41
PID 3068 wrote to memory of 1752	3068	cmd.exe	41
PID 3068 wrote to memory of 1752	3068	cmd.exe	41
PID 2860 wrote to memory of 2596	2860	svchost.exe	42
PID 2860 wrote to memory of 2596	2860	svchost.exe	42
PID 2860 wrote to memory of 2596	2860	svchost.exe	42
PID 2596 wrote to memory of 2180	2596	cmd.exe	44
PID 2596 wrote to memory of 2180	2596	cmd.exe	44
PID 2596 wrote to memory of 2180	2596	cmd.exe	44
PID 2860 wrote to memory of 824	2860	svchost.exe	48
PID 2860 wrote to memory of 824	2860	svchost.exe	48
PID 2860 wrote to memory of 824	2860	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\aggresive ransomware.exe
"C:\Users\Admin\AppData\Local\Temp\aggresive ransomware.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2376
- 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:2860
- - 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:2548
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:2360
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:2924
- - 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:3068
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2036
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1752
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2596
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:2180
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read me .txt
    3⤵
    PID:824

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1756

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1748

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:2624

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:2296

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
274KB

MD5
a1312968ec68e2fd87b0a4652dba511a

SHA1
153e3ae7cc6d8d38ca8d1ef805b51f90dcdc53e1

SHA256
773b5fc4a8f79c7d1fdc9e2c79cf92f67257292da3ab4c6f5551f3308fa84fa0

SHA512
b65191bf7b8e6aa165ed9c37189fd5b13c3f6a5803b01de0329ea8898078bcb8a1d5cd821a8f60951ba18bfd87a2f380867c1a8b1b1ec89129239b7057f2d623

Download Submit
C:\Users\Admin\Desktop\read me .txt

Filesize
102B

MD5
8e826995a13a95c73983e901afdf3597

SHA1
8b79ca70e0ff0ff3ac538c9d55279760f6656bfa

SHA256
b0a0c6c1adaa391936d55042d9904caa366d28d491823338be19cef580f5820d

SHA512
bc4ba9229c8a34660db17ff0acd0bac06c587f4ad1c399f06748a3357d21b763bbdeec1792e7f36766c0ee043abd018f76319659fb0c5b40de82e834548d333b

Download Submit
memory/2376-0-0x000007FEF5A73000-0x000007FEF5A74000-memory.dmp

Filesize
4KB

Download
memory/2376-1-0x0000000000F60000-0x0000000000FAA000-memory.dmp

Filesize
296KB

Download
memory/2860-7-0x0000000000BF0000-0x0000000000C3A000-memory.dmp

Filesize
296KB

Download
memory/2860-27-0x000007FEF5A70000-0x000007FEF645C000-memory.dmp

Filesize
9.9MB

Download
memory/2860-68-0x000007FEF5A70000-0x000007FEF645C000-memory.dmp

Filesize
9.9MB

Download
memory/2860-74-0x000007FEF5A70000-0x000007FEF645C000-memory.dmp

Filesize
9.9MB

Download
memory/2860-75-0x000007FEF5A70000-0x000007FEF645C000-memory.dmp

Filesize
9.9MB

Download