chaos | cc65535243dfd3cd54a9c5ecfcb93c7f918a87c725e9c52925017ab92effe278

Resubmissions

15-10-2024 03:47

241015-ecgjlashrh 10

05-08-2024 04:49

240805-ffygys1eke 10

05-08-2024 03:50

240805-eee4jszepd 10

Analysis

max time kernel
82s
max time network
17s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
05-08-2024 03:50

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General

Target

1af797776ec72874e6519962a5cfa3cd64c6061270774f7278755c69333a0813.exe
Size

2.0MB
MD5

fa06e6aadef2365052156f12c92d7b09
SHA1

82de91795547028be327e75cee0fdf082352bfc9
SHA256

1af797776ec72874e6519962a5cfa3cd64c6061270774f7278755c69333a0813
SHA512

1629a2d234c70e7f1f5927b5a816c80b9fb2c995b4b334ff994848d3c7fe1c8797b231c4baaa63ca1e837081e9859c3ca138cd76a1db314c6b98685f5489566e
SSDEEP

24576:a5SndG2iSNjN2w9Os9cRfO/d8mT6c6aVqwPhUMelU+V:aMfJqsgXmgyJPE

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
behavioral11/memory/2160-1-0x0000000000830000-0x0000000000A34000-memory.dmp	family_chaos
behavioral11/files/0x0035000000015dba-6.dat	family_chaos
behavioral11/memory/2852-8-0x0000000000D70000-0x0000000000F74000-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

pid	Process
392	bcdedit.exe
1812	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
1700	wbadmin.exe

Drops startup file 3 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Windows Defender.url	Windows Defender.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini	Windows Defender.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\傻逼，你被耍了！你的所有文件都被加密！.txt	Windows Defender.exe

Executes dropped EXE 1 IoCs

pid	Process
2852	Windows Defender.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

Drops desktop.ini file(s) 34 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini	Windows Defender.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini	Windows Defender.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini	Windows Defender.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini	Windows Defender.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini	Windows Defender.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	Windows Defender.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini	Windows Defender.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	Windows Defender.exe
File opened for modification	C:\Users\Public\Music\Sample Music\desktop.ini	Windows Defender.exe
File opened for modification	C:\Users\Admin\Searches\desktop.ini	Windows Defender.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini	Windows Defender.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	Windows Defender.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	Windows Defender.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	Windows Defender.exe
File opened for modification	C:\Users\Admin\Favorites\Links for United States\desktop.ini	Windows Defender.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	Windows Defender.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\desktop.ini	Windows Defender.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	Windows Defender.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	Windows Defender.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	Windows Defender.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	Windows Defender.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini	Windows Defender.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini	Windows Defender.exe
File opened for modification	C:\Users\Public\Pictures\Sample Pictures\desktop.ini	Windows Defender.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	Windows Defender.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	Windows Defender.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	Windows Defender.exe
File opened for modification	C:\Users\Admin\Videos\desktop.ini	Windows Defender.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	Windows Defender.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-2172136094-3310281978-782691160-1000\desktop.ini	Windows Defender.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini	Windows Defender.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	Windows Defender.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini	Windows Defender.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini	Windows Defender.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-1-5-21-2172136094-3310281978-782691160-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\a0hjt6s6f.jpg"	Windows Defender.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
2068	vssadmin.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2852	Windows Defender.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2160	1af797776ec72874e6519962a5cfa3cd64c6061270774f7278755c69333a0813.exe
2852	Windows Defender.exe
2852	Windows Defender.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	2160	1af797776ec72874e6519962a5cfa3cd64c6061270774f7278755c69333a0813.exe
Token: SeDebugPrivilege	2852	Windows Defender.exe
Token: SeBackupPrivilege	3016	vssvc.exe
Token: SeRestorePrivilege	3016	vssvc.exe
Token: SeAuditPrivilege	3016	vssvc.exe
Token: SeIncreaseQuotaPrivilege	1308	WMIC.exe
Token: SeSecurityPrivilege	1308	WMIC.exe
Token: SeTakeOwnershipPrivilege	1308	WMIC.exe
Token: SeLoadDriverPrivilege	1308	WMIC.exe
Token: SeSystemProfilePrivilege	1308	WMIC.exe
Token: SeSystemtimePrivilege	1308	WMIC.exe
Token: SeProfSingleProcessPrivilege	1308	WMIC.exe
Token: SeIncBasePriorityPrivilege	1308	WMIC.exe
Token: SeCreatePagefilePrivilege	1308	WMIC.exe
Token: SeBackupPrivilege	1308	WMIC.exe
Token: SeRestorePrivilege	1308	WMIC.exe
Token: SeShutdownPrivilege	1308	WMIC.exe
Token: SeDebugPrivilege	1308	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1308	WMIC.exe
Token: SeRemoteShutdownPrivilege	1308	WMIC.exe
Token: SeUndockPrivilege	1308	WMIC.exe
Token: SeManageVolumePrivilege	1308	WMIC.exe
Token: 33	1308	WMIC.exe
Token: 34	1308	WMIC.exe
Token: 35	1308	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1308	WMIC.exe
Token: SeSecurityPrivilege	1308	WMIC.exe
Token: SeTakeOwnershipPrivilege	1308	WMIC.exe
Token: SeLoadDriverPrivilege	1308	WMIC.exe
Token: SeSystemProfilePrivilege	1308	WMIC.exe
Token: SeSystemtimePrivilege	1308	WMIC.exe
Token: SeProfSingleProcessPrivilege	1308	WMIC.exe
Token: SeIncBasePriorityPrivilege	1308	WMIC.exe
Token: SeCreatePagefilePrivilege	1308	WMIC.exe
Token: SeBackupPrivilege	1308	WMIC.exe
Token: SeRestorePrivilege	1308	WMIC.exe
Token: SeShutdownPrivilege	1308	WMIC.exe
Token: SeDebugPrivilege	1308	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1308	WMIC.exe
Token: SeRemoteShutdownPrivilege	1308	WMIC.exe
Token: SeUndockPrivilege	1308	WMIC.exe
Token: SeManageVolumePrivilege	1308	WMIC.exe
Token: 33	1308	WMIC.exe
Token: 34	1308	WMIC.exe
Token: 35	1308	WMIC.exe
Token: SeBackupPrivilege	2152	wbengine.exe
Token: SeRestorePrivilege	2152	wbengine.exe
Token: SeSecurityPrivilege	2152	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2160 wrote to memory of 2852	2160	1af797776ec72874e6519962a5cfa3cd64c6061270774f7278755c69333a0813.exe	29
PID 2160 wrote to memory of 2852	2160	1af797776ec72874e6519962a5cfa3cd64c6061270774f7278755c69333a0813.exe	29
PID 2160 wrote to memory of 2852	2160	1af797776ec72874e6519962a5cfa3cd64c6061270774f7278755c69333a0813.exe	29
PID 2852 wrote to memory of 2924	2852	Windows Defender.exe	31
PID 2852 wrote to memory of 2924	2852	Windows Defender.exe	31
PID 2852 wrote to memory of 2924	2852	Windows Defender.exe	31
PID 2924 wrote to memory of 2068	2924	cmd.exe	33
PID 2924 wrote to memory of 2068	2924	cmd.exe	33
PID 2924 wrote to memory of 2068	2924	cmd.exe	33
PID 2924 wrote to memory of 1308	2924	cmd.exe	36
PID 2924 wrote to memory of 1308	2924	cmd.exe	36
PID 2924 wrote to memory of 1308	2924	cmd.exe	36
PID 2852 wrote to memory of 1912	2852	Windows Defender.exe	38
PID 2852 wrote to memory of 1912	2852	Windows Defender.exe	38
PID 2852 wrote to memory of 1912	2852	Windows Defender.exe	38
PID 1912 wrote to memory of 392	1912	cmd.exe	40
PID 1912 wrote to memory of 392	1912	cmd.exe	40
PID 1912 wrote to memory of 392	1912	cmd.exe	40
PID 1912 wrote to memory of 1812	1912	cmd.exe	41
PID 1912 wrote to memory of 1812	1912	cmd.exe	41
PID 1912 wrote to memory of 1812	1912	cmd.exe	41
PID 2852 wrote to memory of 1480	2852	Windows Defender.exe	42
PID 2852 wrote to memory of 1480	2852	Windows Defender.exe	42
PID 2852 wrote to memory of 1480	2852	Windows Defender.exe	42
PID 1480 wrote to memory of 1700	1480	cmd.exe	44
PID 1480 wrote to memory of 1700	1480	cmd.exe	44
PID 1480 wrote to memory of 1700	1480	cmd.exe	44
PID 2852 wrote to memory of 2464	2852	Windows Defender.exe	48
PID 2852 wrote to memory of 2464	2852	Windows Defender.exe	48
PID 2852 wrote to memory of 2464	2852	Windows Defender.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\1af797776ec72874e6519962a5cfa3cd64c6061270774f7278755c69333a0813.exe
"C:\Users\Admin\AppData\Local\Temp\1af797776ec72874e6519962a5cfa3cd64c6061270774f7278755c69333a0813.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2160
- C:\Users\Admin\AppData\Roaming\Windows Defender.exe
  "C:\Users\Admin\AppData\Roaming\Windows Defender.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:2852
- - 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:2924
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:2068
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:1308
- - 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:1912
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:392
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1812
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1480
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:1700
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\傻逼，你被耍了！你的所有文件都被加密！.txt
    3⤵
    PID:2464

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3016

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2152

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:1472

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:524

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

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\Windows Defender.exe

Filesize
2.0MB

MD5
fa06e6aadef2365052156f12c92d7b09

SHA1
82de91795547028be327e75cee0fdf082352bfc9

SHA256
1af797776ec72874e6519962a5cfa3cd64c6061270774f7278755c69333a0813

SHA512
1629a2d234c70e7f1f5927b5a816c80b9fb2c995b4b334ff994848d3c7fe1c8797b231c4baaa63ca1e837081e9859c3ca138cd76a1db314c6b98685f5489566e

Download Submit
C:\Users\Admin\Documents\傻逼，你被耍了！你的所有文件都被加密！.txt

Filesize
470B

MD5
c83c2b8e368e928c7ab979f7bb44dac4

SHA1
4662ae6c1d2195a178bdeb23141df221181b9fdf

SHA256
d42f2a19a64f644085bb2411b58397f5ce8ff1d85857e9985163138964ea0251

SHA512
599f1cb6d607069544a492ed198fea62e51c5cefeb02ec33843cb63255705a2cf412467814493edf7a920b38ad71c65d8e6bd803b28b2f160e3b0727fc2cba2e

Download Submit
memory/2160-0-0x000007FEF5EA3000-0x000007FEF5EA4000-memory.dmp

Filesize
4KB

Download
memory/2160-1-0x0000000000830000-0x0000000000A34000-memory.dmp

Filesize
2.0MB

Download
memory/2160-2-0x000007FEF5EA3000-0x000007FEF5EA4000-memory.dmp

Filesize
4KB

Download
memory/2852-8-0x0000000000D70000-0x0000000000F74000-memory.dmp

Filesize
2.0MB

Download
memory/2852-24-0x000007FEF5EA0000-0x000007FEF688C000-memory.dmp

Filesize
9.9MB

Download
memory/2852-33-0x000007FEF5EA0000-0x000007FEF688C000-memory.dmp

Filesize
9.9MB

Download
memory/2852-483-0x000007FEF5EA0000-0x000007FEF688C000-memory.dmp

Filesize
9.9MB

Download