chaos | cc65535243dfd3cd54a9c5ecfcb93c7f918a87c725e9c52925017ab92effe278

Analysis

max time kernel
122s
max time network
127s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
13-07-2024 09:29

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General

Target

2a05ac3c433bcf896be4cf984b0ea5ea41006f2421cb4a4926d5eaaed6cf37e4.exe
Size

205KB
MD5

5e9e6b90b530260d1f6dd462a9a2fa16
SHA1

3caa6e6d2aed85b9ea046a077a972c2a1718ee7b
SHA256

2a05ac3c433bcf896be4cf984b0ea5ea41006f2421cb4a4926d5eaaed6cf37e4
SHA512

2a0e6f2687e3bbb4158ce7bfc46b1c86794cb23fdbb041d0e5735b0e2674a9b27259edee3044e58202528e72e6c1b2ab6c4f7aeabb193f9d7f48b5bb60211f62
SSDEEP

6144:+B4Fr9NzqHW7V5V9w/UIRZizI1aqebq/lsyp:+B45qHW7nU/pZmiXqy

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

Processes:

resource	yara_rule
behavioral27/memory/1720-1-0x0000000000F40000-0x0000000000F78000-memory.dmp	family_chaos
C:\Users\Admin\AppData\Roaming\svchost.exe	family_chaos
behavioral27/memory/1212-7-0x00000000002E0000-0x0000000000318000-memory.dmp	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

Processes:

bcdedit.exebcdedit.exe

pid process

1300 bcdedit.exe
2460 bcdedit.exe
Renames multiple (206) 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

Processes:

wbadmin.exe

pid process

2220 wbadmin.exe

pid	process
1300	bcdedit.exe
2460	bcdedit.exe

pid	process
2220	wbadmin.exe

Drops startup file 3 IoCs

Processes:

svchost.exe

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

Processes:

svchost.exe

pid process

1212 svchost.exe
Reads user/profile data of web browsers 2 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

pid	process
1212	svchost.exe

Drops desktop.ini file(s) 34 IoCs

Processes:

svchost.exe

description	ioc	process
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\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\Maintenance\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\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\SendTo\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\Internet Explorer\Quick Launch\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\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\Start Menu\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\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\Accessories\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\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\Public\Videos\Sample Videos\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-940600906-3464502421-4240639183-1000\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\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\Desktop\desktop.ini	svchost.exe
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\AppData\Roaming\Microsoft\Windows\Libraries\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\Sample Pictures\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\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Saved Games\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

Processes:

vssadmin.exe

pid process

1008 vssadmin.exe
Opens file in notepad (likely ransom note) 1 IoCs
ransomware

Processes:

NOTEPAD.EXE

pid process

2980 NOTEPAD.EXE
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

svchost.exe

pid process

1212 svchost.exe

pid	process
1008	vssadmin.exe

pid	process
2980	NOTEPAD.EXE

pid	process
1212	svchost.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

Processes:

2a05ac3c433bcf896be4cf984b0ea5ea41006f2421cb4a4926d5eaaed6cf37e4.exesvchost.exe

pid	process
1720	2a05ac3c433bcf896be4cf984b0ea5ea41006f2421cb4a4926d5eaaed6cf37e4.exe
1720	2a05ac3c433bcf896be4cf984b0ea5ea41006f2421cb4a4926d5eaaed6cf37e4.exe
1720	2a05ac3c433bcf896be4cf984b0ea5ea41006f2421cb4a4926d5eaaed6cf37e4.exe
1212	svchost.exe
1212	svchost.exe
1212	svchost.exe
1212	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

2a05ac3c433bcf896be4cf984b0ea5ea41006f2421cb4a4926d5eaaed6cf37e4.exesvchost.exevssvc.exeWMIC.exewbengine.exe

description	pid	process
Token: SeDebugPrivilege	1720	2a05ac3c433bcf896be4cf984b0ea5ea41006f2421cb4a4926d5eaaed6cf37e4.exe
Token: SeDebugPrivilege	1212	svchost.exe
Token: SeBackupPrivilege	2112	vssvc.exe
Token: SeRestorePrivilege	2112	vssvc.exe
Token: SeAuditPrivilege	2112	vssvc.exe
Token: SeIncreaseQuotaPrivilege	1744	WMIC.exe
Token: SeSecurityPrivilege	1744	WMIC.exe
Token: SeTakeOwnershipPrivilege	1744	WMIC.exe
Token: SeLoadDriverPrivilege	1744	WMIC.exe
Token: SeSystemProfilePrivilege	1744	WMIC.exe
Token: SeSystemtimePrivilege	1744	WMIC.exe
Token: SeProfSingleProcessPrivilege	1744	WMIC.exe
Token: SeIncBasePriorityPrivilege	1744	WMIC.exe
Token: SeCreatePagefilePrivilege	1744	WMIC.exe
Token: SeBackupPrivilege	1744	WMIC.exe
Token: SeRestorePrivilege	1744	WMIC.exe
Token: SeShutdownPrivilege	1744	WMIC.exe
Token: SeDebugPrivilege	1744	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1744	WMIC.exe
Token: SeRemoteShutdownPrivilege	1744	WMIC.exe
Token: SeUndockPrivilege	1744	WMIC.exe
Token: SeManageVolumePrivilege	1744	WMIC.exe
Token: 33	1744	WMIC.exe
Token: 34	1744	WMIC.exe
Token: 35	1744	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1744	WMIC.exe
Token: SeSecurityPrivilege	1744	WMIC.exe
Token: SeTakeOwnershipPrivilege	1744	WMIC.exe
Token: SeLoadDriverPrivilege	1744	WMIC.exe
Token: SeSystemProfilePrivilege	1744	WMIC.exe
Token: SeSystemtimePrivilege	1744	WMIC.exe
Token: SeProfSingleProcessPrivilege	1744	WMIC.exe
Token: SeIncBasePriorityPrivilege	1744	WMIC.exe
Token: SeCreatePagefilePrivilege	1744	WMIC.exe
Token: SeBackupPrivilege	1744	WMIC.exe
Token: SeRestorePrivilege	1744	WMIC.exe
Token: SeShutdownPrivilege	1744	WMIC.exe
Token: SeDebugPrivilege	1744	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1744	WMIC.exe
Token: SeRemoteShutdownPrivilege	1744	WMIC.exe
Token: SeUndockPrivilege	1744	WMIC.exe
Token: SeManageVolumePrivilege	1744	WMIC.exe
Token: 33	1744	WMIC.exe
Token: 34	1744	WMIC.exe
Token: 35	1744	WMIC.exe
Token: SeBackupPrivilege	1280	wbengine.exe
Token: SeRestorePrivilege	1280	wbengine.exe
Token: SeSecurityPrivilege	1280	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

2a05ac3c433bcf896be4cf984b0ea5ea41006f2421cb4a4926d5eaaed6cf37e4.exesvchost.execmd.execmd.execmd.exe

description	pid	process	target process
PID 1720 wrote to memory of 1212	1720	2a05ac3c433bcf896be4cf984b0ea5ea41006f2421cb4a4926d5eaaed6cf37e4.exe	svchost.exe
PID 1720 wrote to memory of 1212	1720	2a05ac3c433bcf896be4cf984b0ea5ea41006f2421cb4a4926d5eaaed6cf37e4.exe	svchost.exe
PID 1720 wrote to memory of 1212	1720	2a05ac3c433bcf896be4cf984b0ea5ea41006f2421cb4a4926d5eaaed6cf37e4.exe	svchost.exe
PID 1212 wrote to memory of 1920	1212	svchost.exe	cmd.exe
PID 1212 wrote to memory of 1920	1212	svchost.exe	cmd.exe
PID 1212 wrote to memory of 1920	1212	svchost.exe	cmd.exe
PID 1920 wrote to memory of 1008	1920	cmd.exe	vssadmin.exe
PID 1920 wrote to memory of 1008	1920	cmd.exe	vssadmin.exe
PID 1920 wrote to memory of 1008	1920	cmd.exe	vssadmin.exe
PID 1920 wrote to memory of 1744	1920	cmd.exe	WMIC.exe
PID 1920 wrote to memory of 1744	1920	cmd.exe	WMIC.exe
PID 1920 wrote to memory of 1744	1920	cmd.exe	WMIC.exe
PID 1212 wrote to memory of 1692	1212	svchost.exe	cmd.exe
PID 1212 wrote to memory of 1692	1212	svchost.exe	cmd.exe
PID 1212 wrote to memory of 1692	1212	svchost.exe	cmd.exe
PID 1692 wrote to memory of 1300	1692	cmd.exe	bcdedit.exe
PID 1692 wrote to memory of 1300	1692	cmd.exe	bcdedit.exe
PID 1692 wrote to memory of 1300	1692	cmd.exe	bcdedit.exe
PID 1692 wrote to memory of 2460	1692	cmd.exe	bcdedit.exe
PID 1692 wrote to memory of 2460	1692	cmd.exe	bcdedit.exe
PID 1692 wrote to memory of 2460	1692	cmd.exe	bcdedit.exe
PID 1212 wrote to memory of 2056	1212	svchost.exe	cmd.exe
PID 1212 wrote to memory of 2056	1212	svchost.exe	cmd.exe
PID 1212 wrote to memory of 2056	1212	svchost.exe	cmd.exe
PID 2056 wrote to memory of 2220	2056	cmd.exe	wbadmin.exe
PID 2056 wrote to memory of 2220	2056	cmd.exe	wbadmin.exe
PID 2056 wrote to memory of 2220	2056	cmd.exe	wbadmin.exe
PID 1212 wrote to memory of 2980	1212	svchost.exe	NOTEPAD.EXE
PID 1212 wrote to memory of 2980	1212	svchost.exe	NOTEPAD.EXE
PID 1212 wrote to memory of 2980	1212	svchost.exe	NOTEPAD.EXE

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\2a05ac3c433bcf896be4cf984b0ea5ea41006f2421cb4a4926d5eaaed6cf37e4.exe
"C:\Users\Admin\AppData\Local\Temp\2a05ac3c433bcf896be4cf984b0ea5ea41006f2421cb4a4926d5eaaed6cf37e4.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1720
- 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:1212
- - 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:1920
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:1008
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:1744
- - 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:1692
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1300
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2460
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2056
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:2220
- - 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:2980

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2112

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1280

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:1156

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:3028

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

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

Replay Monitor

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Downloads

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

Filesize
205KB

MD5
5e9e6b90b530260d1f6dd462a9a2fa16

SHA1
3caa6e6d2aed85b9ea046a077a972c2a1718ee7b

SHA256
2a05ac3c433bcf896be4cf984b0ea5ea41006f2421cb4a4926d5eaaed6cf37e4

SHA512
2a0e6f2687e3bbb4158ce7bfc46b1c86794cb23fdbb041d0e5735b0e2674a9b27259edee3044e58202528e72e6c1b2ab6c4f7aeabb193f9d7f48b5bb60211f62

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

Filesize
844B

MD5
a23e76ce33adf72409fb0c43393d3087

SHA1
502620245be1d0912ab9c4fb5390ab14e27778a8

SHA256
88702c38b8bea9555a13ae747cbfdf2947fff6060f4fef75486025e0152ddf3a

SHA512
24fdd6761b29eb62ecfefa7a5ed15705645c3a303ada3728823382ba38e08eae12f15840fb65361391cff1ba4cad55fdfb6e0144c9e95b7e7fbe928319d732bb

Download Submit
memory/1212-7-0x00000000002E0000-0x0000000000318000-memory.dmp

Filesize
224KB

Download
memory/1212-9-0x000007FEF5F40000-0x000007FEF692C000-memory.dmp

Filesize
9.9MB

Download
memory/1212-10-0x000007FEF5F40000-0x000007FEF692C000-memory.dmp

Filesize
9.9MB

Download
memory/1212-475-0x000007FEF5F40000-0x000007FEF692C000-memory.dmp

Filesize
9.9MB

Download
memory/1720-0-0x000007FEF5F43000-0x000007FEF5F44000-memory.dmp

Filesize
4KB

Download
memory/1720-1-0x0000000000F40000-0x0000000000F78000-memory.dmp

Filesize
224KB

Download