chaos | f09438a852d90d99ec619f8b73d01049be8013004d1e0fe152f7503656ba5db0

Analysis

max time kernel
46s
max time network
19s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
08-02-2025 18:48

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General

Target

LENA.exe
Size

519KB
MD5

9f1d43d49dec18bb02d19f7b874a538b
SHA1

0e622f91b3ec6cf8795f324b69bcd4e733bf17c5
SHA256

f09438a852d90d99ec619f8b73d01049be8013004d1e0fe152f7503656ba5db0
SHA512

ccc219193dc438b478732b280c0d60ac33a963a8e3a10878d3e2b0f30c169a8b2b87d857600df3061abb381a8bbb7fc5eb0dc84f6b37cfeac0a7ada9cc5054c8
SSDEEP

12288:SqX5wFxlDE6dpwJvm61wEmzZGvKRz+DFkCSaGXe9z:5CJTyIy

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/2104-1-0x0000000000E20000-0x0000000000EA8000-memory.dmp	family_chaos
behavioral1/files/0x000b0000000195c5-6.dat	family_chaos
behavioral1/memory/2240-8-0x0000000001230000-0x00000000012B8000-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
2236	bcdedit.exe
2416	bcdedit.exe

Renames multiple (234) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

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
2464	wbadmin.exe

Drops startup file 3 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\LENA.url	LENA.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini	LENA.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\LENA.txt	LENA.exe

Executes dropped EXE 1 IoCs

pid	Process
2240	LENA.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\desktop.ini	LENA.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini	LENA.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	LENA.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	LENA.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini	LENA.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	LENA.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini	LENA.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini	LENA.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini	LENA.exe
File opened for modification	C:\Users\Public\Pictures\Sample Pictures\desktop.ini	LENA.exe
File opened for modification	C:\Users\Admin\Videos\desktop.ini	LENA.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	LENA.exe
File opened for modification	C:\Users\Public\Music\Sample Music\desktop.ini	LENA.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	LENA.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	LENA.exe
File opened for modification	C:\Users\Admin\Searches\desktop.ini	LENA.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	LENA.exe
File opened for modification	C:\Users\Admin\Favorites\Links for United States\desktop.ini	LENA.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	LENA.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	LENA.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini	LENA.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini	LENA.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\desktop.ini	LENA.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	LENA.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	LENA.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini	LENA.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini	LENA.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	LENA.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	LENA.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	LENA.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	LENA.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini	LENA.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini	LENA.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-3692679935-4019334568-335155002-1000\desktop.ini	LENA.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\\2qcv1mmie.jpg"	LENA.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
856	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
2292	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2240	LENA.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2104	LENA.exe
2104	LENA.exe
2104	LENA.exe
2240	LENA.exe
2240	LENA.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	2104	LENA.exe
Token: SeDebugPrivilege	2240	LENA.exe
Token: SeBackupPrivilege	1844	vssvc.exe
Token: SeRestorePrivilege	1844	vssvc.exe
Token: SeAuditPrivilege	1844	vssvc.exe
Token: SeIncreaseQuotaPrivilege	772	WMIC.exe
Token: SeSecurityPrivilege	772	WMIC.exe
Token: SeTakeOwnershipPrivilege	772	WMIC.exe
Token: SeLoadDriverPrivilege	772	WMIC.exe
Token: SeSystemProfilePrivilege	772	WMIC.exe
Token: SeSystemtimePrivilege	772	WMIC.exe
Token: SeProfSingleProcessPrivilege	772	WMIC.exe
Token: SeIncBasePriorityPrivilege	772	WMIC.exe
Token: SeCreatePagefilePrivilege	772	WMIC.exe
Token: SeBackupPrivilege	772	WMIC.exe
Token: SeRestorePrivilege	772	WMIC.exe
Token: SeShutdownPrivilege	772	WMIC.exe
Token: SeDebugPrivilege	772	WMIC.exe
Token: SeSystemEnvironmentPrivilege	772	WMIC.exe
Token: SeRemoteShutdownPrivilege	772	WMIC.exe
Token: SeUndockPrivilege	772	WMIC.exe
Token: SeManageVolumePrivilege	772	WMIC.exe
Token: 33	772	WMIC.exe
Token: 34	772	WMIC.exe
Token: 35	772	WMIC.exe
Token: SeIncreaseQuotaPrivilege	772	WMIC.exe
Token: SeSecurityPrivilege	772	WMIC.exe
Token: SeTakeOwnershipPrivilege	772	WMIC.exe
Token: SeLoadDriverPrivilege	772	WMIC.exe
Token: SeSystemProfilePrivilege	772	WMIC.exe
Token: SeSystemtimePrivilege	772	WMIC.exe
Token: SeProfSingleProcessPrivilege	772	WMIC.exe
Token: SeIncBasePriorityPrivilege	772	WMIC.exe
Token: SeCreatePagefilePrivilege	772	WMIC.exe
Token: SeBackupPrivilege	772	WMIC.exe
Token: SeRestorePrivilege	772	WMIC.exe
Token: SeShutdownPrivilege	772	WMIC.exe
Token: SeDebugPrivilege	772	WMIC.exe
Token: SeSystemEnvironmentPrivilege	772	WMIC.exe
Token: SeRemoteShutdownPrivilege	772	WMIC.exe
Token: SeUndockPrivilege	772	WMIC.exe
Token: SeManageVolumePrivilege	772	WMIC.exe
Token: 33	772	WMIC.exe
Token: 34	772	WMIC.exe
Token: 35	772	WMIC.exe
Token: SeBackupPrivilege	2480	wbengine.exe
Token: SeRestorePrivilege	2480	wbengine.exe
Token: SeSecurityPrivilege	2480	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2104 wrote to memory of 2240	2104	LENA.exe	30
PID 2104 wrote to memory of 2240	2104	LENA.exe	30
PID 2104 wrote to memory of 2240	2104	LENA.exe	30
PID 2240 wrote to memory of 2520	2240	LENA.exe	32
PID 2240 wrote to memory of 2520	2240	LENA.exe	32
PID 2240 wrote to memory of 2520	2240	LENA.exe	32
PID 2520 wrote to memory of 856	2520	cmd.exe	35
PID 2520 wrote to memory of 856	2520	cmd.exe	35
PID 2520 wrote to memory of 856	2520	cmd.exe	35
PID 2520 wrote to memory of 772	2520	cmd.exe	38
PID 2520 wrote to memory of 772	2520	cmd.exe	38
PID 2520 wrote to memory of 772	2520	cmd.exe	38
PID 2240 wrote to memory of 1664	2240	LENA.exe	40
PID 2240 wrote to memory of 1664	2240	LENA.exe	40
PID 2240 wrote to memory of 1664	2240	LENA.exe	40
PID 1664 wrote to memory of 2236	1664	cmd.exe	42
PID 1664 wrote to memory of 2236	1664	cmd.exe	42
PID 1664 wrote to memory of 2236	1664	cmd.exe	42
PID 1664 wrote to memory of 2416	1664	cmd.exe	43
PID 1664 wrote to memory of 2416	1664	cmd.exe	43
PID 1664 wrote to memory of 2416	1664	cmd.exe	43
PID 2240 wrote to memory of 1484	2240	LENA.exe	44
PID 2240 wrote to memory of 1484	2240	LENA.exe	44
PID 2240 wrote to memory of 1484	2240	LENA.exe	44
PID 1484 wrote to memory of 2464	1484	cmd.exe	46
PID 1484 wrote to memory of 2464	1484	cmd.exe	46
PID 1484 wrote to memory of 2464	1484	cmd.exe	46
PID 2240 wrote to memory of 2292	2240	LENA.exe	50
PID 2240 wrote to memory of 2292	2240	LENA.exe	50
PID 2240 wrote to memory of 2292	2240	LENA.exe	50

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\LENA.exe
"C:\Users\Admin\AppData\Local\Temp\LENA.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2104
- C:\Users\Admin\AppData\Roaming\LENA.exe
  "C:\Users\Admin\AppData\Roaming\LENA.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:2240
- - 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:2520
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:856
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:772
- - 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:1664
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2236
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2416
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1484
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:2464
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\LENA.txt
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:2292

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1844

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2480

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:1596

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:2176

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\LENA.exe

Filesize
519KB

MD5
9f1d43d49dec18bb02d19f7b874a538b

SHA1
0e622f91b3ec6cf8795f324b69bcd4e733bf17c5

SHA256
f09438a852d90d99ec619f8b73d01049be8013004d1e0fe152f7503656ba5db0

SHA512
ccc219193dc438b478732b280c0d60ac33a963a8e3a10878d3e2b0f30c169a8b2b87d857600df3061abb381a8bbb7fc5eb0dc84f6b37cfeac0a7ada9cc5054c8

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

Filesize
32B

MD5
fcf7e583accf4a63479b965fc16e0cc9

SHA1
3db8aab193ee4deedbd488b8a5b5bf079d172948

SHA256
e27512faedb4cd65a9e2b3f62bb549bdb5089d966ea179f19f57491b22ab92ca

SHA512
ab01880af0c72a242fa9dd668df637f699e951647fdcfde94e49ee2d05e58707c837d17ce8777b50a7959ac7ff30943ce0020ef29c63859b3482769de29ccda6

Download Submit
memory/2104-0-0x000007FEF6183000-0x000007FEF6184000-memory.dmp

Filesize
4KB

Download
memory/2104-1-0x0000000000E20000-0x0000000000EA8000-memory.dmp

Filesize
544KB

Download
memory/2104-2-0x000007FEF6183000-0x000007FEF6184000-memory.dmp

Filesize
4KB

Download
memory/2240-8-0x0000000001230000-0x00000000012B8000-memory.dmp

Filesize
544KB

Download
memory/2240-18-0x000007FEF6180000-0x000007FEF6B6C000-memory.dmp

Filesize
9.9MB

Download
memory/2240-27-0x000007FEF6180000-0x000007FEF6B6C000-memory.dmp

Filesize
9.9MB

Download
memory/2240-353-0x000007FEF6180000-0x000007FEF6B6C000-memory.dmp

Filesize
9.9MB

Download
memory/2240-460-0x000007FEF6180000-0x000007FEF6B6C000-memory.dmp

Filesize
9.9MB

Download