chaos | 0d9fcb8894240750cb5e4222ea78572aba6618eb5297c2069588ceb979d52d8b

Resubmissions

13-07-2024 09:54

240713-lxcvgawdmn 10

13-07-2024 09:52

240713-lv46yawdkj 10

13-07-2024 09:46

240713-lrz3tayajc 10

Analysis

max time kernel
842s
max time network
847s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
13-07-2024 09:52

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General

Target

6312ac91761037de7a7afc7323671a004db71b31a69499178437bdf939fa9dd8.exe
Size

400KB
MD5

47e14a46326791625b67704d4329bed6
SHA1

01e0e607678a36d8e7e23d1fb11f8d7aa2c20581
SHA256

6312ac91761037de7a7afc7323671a004db71b31a69499178437bdf939fa9dd8
SHA512

e979fb4537a7fadbc6583a5cd537ce533111ea4a596bd8486b9fbf551ed7b390271a6218ccf71cd052d4270c1fe1957ec0aae4527c9613a0cdbc0e24641a19a2
SSDEEP

6144:cMr9/U806q0jnjCyc1rIGruapfd7ggZqLuID/pFZwVZ3j:a806qwjCycpIGRpfd8cqCITpFZwD3

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
behavioral10/memory/1036-1-0x00000000009B0000-0x0000000000A1A000-memory.dmp	family_chaos
C:\Users\Admin\AppData\Roaming\svchost.exe	family_chaos
behavioral10/memory/2636-7-0x0000000000950000-0x00000000009BA000-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

2184 bcdedit.exe
1904 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

Processes:

wbadmin.exe

pid process

1148 wbadmin.exe

pid	process
2184	bcdedit.exe
1904	bcdedit.exe

pid	process
1148	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\for dencrypt	svchost.exe
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

Executes dropped EXE 1 IoCs

Processes:

svchost.exe

pid process

2636 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
2636	svchost.exe

Drops desktop.ini file(s) 34 IoCs

Processes:

svchost.exe

description	ioc	process
File opened for modification	C:\Users\Public\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Saved Games\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\Public\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\Admin\Favorites\Links for United States\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\Libraries\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Music\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\Sample Pictures\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\SendTo\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\Accessories\Accessibility\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\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\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\Start Menu\Programs\Administrative Tools\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Desktop\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\Recent\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	F:\$RECYCLE.BIN\S-1-5-21-3502430532-24693940-2469786940-1000\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\Sample Music\desktop.ini	svchost.exe

Sets desktop wallpaper using registry 2 TTPs 1 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\kg0s9zn34.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

Processes:

vssadmin.exe

pid process

284 vssadmin.exe
Modifies registry class 1 IoCs

Processes:

rundll32.exe

description ioc process

Key created \REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000_Classes\Local Settings rundll32.exe
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

svchost.exe

pid process

2636 svchost.exe

pid	process
284	vssadmin.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000_Classes\Local Settings	rundll32.exe

pid	process
2636	svchost.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

Processes:

6312ac91761037de7a7afc7323671a004db71b31a69499178437bdf939fa9dd8.exesvchost.exe

pid	process
1036	6312ac91761037de7a7afc7323671a004db71b31a69499178437bdf939fa9dd8.exe
1036	6312ac91761037de7a7afc7323671a004db71b31a69499178437bdf939fa9dd8.exe
1036	6312ac91761037de7a7afc7323671a004db71b31a69499178437bdf939fa9dd8.exe
2636	svchost.exe
2636	svchost.exe
2636	svchost.exe
2636	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

AcroRd32.exe

pid process

2100 AcroRd32.exe

pid	process
2100	AcroRd32.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

6312ac91761037de7a7afc7323671a004db71b31a69499178437bdf939fa9dd8.exesvchost.exevssvc.exeWMIC.exewbengine.exe

description	pid	process
Token: SeDebugPrivilege	1036	6312ac91761037de7a7afc7323671a004db71b31a69499178437bdf939fa9dd8.exe
Token: SeDebugPrivilege	2636	svchost.exe
Token: SeBackupPrivilege	2740	vssvc.exe
Token: SeRestorePrivilege	2740	vssvc.exe
Token: SeAuditPrivilege	2740	vssvc.exe
Token: SeIncreaseQuotaPrivilege	1924	WMIC.exe
Token: SeSecurityPrivilege	1924	WMIC.exe
Token: SeTakeOwnershipPrivilege	1924	WMIC.exe
Token: SeLoadDriverPrivilege	1924	WMIC.exe
Token: SeSystemProfilePrivilege	1924	WMIC.exe
Token: SeSystemtimePrivilege	1924	WMIC.exe
Token: SeProfSingleProcessPrivilege	1924	WMIC.exe
Token: SeIncBasePriorityPrivilege	1924	WMIC.exe
Token: SeCreatePagefilePrivilege	1924	WMIC.exe
Token: SeBackupPrivilege	1924	WMIC.exe
Token: SeRestorePrivilege	1924	WMIC.exe
Token: SeShutdownPrivilege	1924	WMIC.exe
Token: SeDebugPrivilege	1924	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1924	WMIC.exe
Token: SeRemoteShutdownPrivilege	1924	WMIC.exe
Token: SeUndockPrivilege	1924	WMIC.exe
Token: SeManageVolumePrivilege	1924	WMIC.exe
Token: 33	1924	WMIC.exe
Token: 34	1924	WMIC.exe
Token: 35	1924	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1924	WMIC.exe
Token: SeSecurityPrivilege	1924	WMIC.exe
Token: SeTakeOwnershipPrivilege	1924	WMIC.exe
Token: SeLoadDriverPrivilege	1924	WMIC.exe
Token: SeSystemProfilePrivilege	1924	WMIC.exe
Token: SeSystemtimePrivilege	1924	WMIC.exe
Token: SeProfSingleProcessPrivilege	1924	WMIC.exe
Token: SeIncBasePriorityPrivilege	1924	WMIC.exe
Token: SeCreatePagefilePrivilege	1924	WMIC.exe
Token: SeBackupPrivilege	1924	WMIC.exe
Token: SeRestorePrivilege	1924	WMIC.exe
Token: SeShutdownPrivilege	1924	WMIC.exe
Token: SeDebugPrivilege	1924	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1924	WMIC.exe
Token: SeRemoteShutdownPrivilege	1924	WMIC.exe
Token: SeUndockPrivilege	1924	WMIC.exe
Token: SeManageVolumePrivilege	1924	WMIC.exe
Token: 33	1924	WMIC.exe
Token: 34	1924	WMIC.exe
Token: 35	1924	WMIC.exe
Token: SeBackupPrivilege	932	wbengine.exe
Token: SeRestorePrivilege	932	wbengine.exe
Token: SeSecurityPrivilege	932	wbengine.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

AcroRd32.exe

pid process

2100 AcroRd32.exe
2100 AcroRd32.exe

pid	process
2100	AcroRd32.exe
2100	AcroRd32.exe

Suspicious use of WriteProcessMemory 34 IoCs

Processes:

6312ac91761037de7a7afc7323671a004db71b31a69499178437bdf939fa9dd8.exesvchost.execmd.execmd.execmd.exerundll32.exe

description	pid	process	target process
PID 1036 wrote to memory of 2636	1036	6312ac91761037de7a7afc7323671a004db71b31a69499178437bdf939fa9dd8.exe	svchost.exe
PID 1036 wrote to memory of 2636	1036	6312ac91761037de7a7afc7323671a004db71b31a69499178437bdf939fa9dd8.exe	svchost.exe
PID 1036 wrote to memory of 2636	1036	6312ac91761037de7a7afc7323671a004db71b31a69499178437bdf939fa9dd8.exe	svchost.exe
PID 2636 wrote to memory of 2876	2636	svchost.exe	cmd.exe
PID 2636 wrote to memory of 2876	2636	svchost.exe	cmd.exe
PID 2636 wrote to memory of 2876	2636	svchost.exe	cmd.exe
PID 2876 wrote to memory of 284	2876	cmd.exe	vssadmin.exe
PID 2876 wrote to memory of 284	2876	cmd.exe	vssadmin.exe
PID 2876 wrote to memory of 284	2876	cmd.exe	vssadmin.exe
PID 2876 wrote to memory of 1924	2876	cmd.exe	WMIC.exe
PID 2876 wrote to memory of 1924	2876	cmd.exe	WMIC.exe
PID 2876 wrote to memory of 1924	2876	cmd.exe	WMIC.exe
PID 2636 wrote to memory of 1096	2636	svchost.exe	cmd.exe
PID 2636 wrote to memory of 1096	2636	svchost.exe	cmd.exe
PID 2636 wrote to memory of 1096	2636	svchost.exe	cmd.exe
PID 1096 wrote to memory of 2184	1096	cmd.exe	bcdedit.exe
PID 1096 wrote to memory of 2184	1096	cmd.exe	bcdedit.exe
PID 1096 wrote to memory of 2184	1096	cmd.exe	bcdedit.exe
PID 1096 wrote to memory of 1904	1096	cmd.exe	bcdedit.exe
PID 1096 wrote to memory of 1904	1096	cmd.exe	bcdedit.exe
PID 1096 wrote to memory of 1904	1096	cmd.exe	bcdedit.exe
PID 2636 wrote to memory of 2948	2636	svchost.exe	cmd.exe
PID 2636 wrote to memory of 2948	2636	svchost.exe	cmd.exe
PID 2636 wrote to memory of 2948	2636	svchost.exe	cmd.exe
PID 2948 wrote to memory of 1148	2948	cmd.exe	wbadmin.exe
PID 2948 wrote to memory of 1148	2948	cmd.exe	wbadmin.exe
PID 2948 wrote to memory of 1148	2948	cmd.exe	wbadmin.exe
PID 2636 wrote to memory of 2524	2636	svchost.exe	rundll32.exe
PID 2636 wrote to memory of 2524	2636	svchost.exe	rundll32.exe
PID 2636 wrote to memory of 2524	2636	svchost.exe	rundll32.exe
PID 2524 wrote to memory of 2100	2524	rundll32.exe	AcroRd32.exe
PID 2524 wrote to memory of 2100	2524	rundll32.exe	AcroRd32.exe
PID 2524 wrote to memory of 2100	2524	rundll32.exe	AcroRd32.exe
PID 2524 wrote to memory of 2100	2524	rundll32.exe	AcroRd32.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\6312ac91761037de7a7afc7323671a004db71b31a69499178437bdf939fa9dd8.exe
"C:\Users\Admin\AppData\Local\Temp\6312ac91761037de7a7afc7323671a004db71b31a69499178437bdf939fa9dd8.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1036
- 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:2636
- - 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:2876
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:284
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:1924
- - 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:1096
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2184
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1904
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2948
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:1148
- - C:\Windows\system32\rundll32.exe
    "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Roaming\for dencrypt
    3⤵
    - Modifies registry class
    - Suspicious use of WriteProcessMemory
    PID:2524
  - - C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe
      "C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe" "C:\Users\Admin\AppData\Roaming\for dencrypt"
      4⤵
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of SetWindowsHookEx
      PID:2100

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2740

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:932

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:1732

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:1704

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\Adobe\Acrobat\9.0\SharedDataEvents

Filesize
3KB

MD5
d58dd612097ee7d39adc3e086101f2b4

SHA1
f92448ea167afe154f3858e7620c5170eb264e06

SHA256
62f9744da7e9df097f320c9b643120df56671e44715d19a91ed6d318bbfed537

SHA512
ea897ebf1ce077dd50d1eadd868920c3c577e7d479f9b3d667f3b2fdfbea7d43d910e53f1846507f247320755f3276642b6ba64cd3941772dafacb6939bb489f

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

Filesize
400KB

MD5
47e14a46326791625b67704d4329bed6

SHA1
01e0e607678a36d8e7e23d1fb11f8d7aa2c20581

SHA256
6312ac91761037de7a7afc7323671a004db71b31a69499178437bdf939fa9dd8

SHA512
e979fb4537a7fadbc6583a5cd537ce533111ea4a596bd8486b9fbf551ed7b390271a6218ccf71cd052d4270c1fe1957ec0aae4527c9613a0cdbc0e24641a19a2

Download Submit
C:\Users\Admin\Documents\for dencrypt

Filesize
462B

MD5
8649ec15ace934e93b7b02b651bb1ec1

SHA1
0e0d2b07183b05acc18b0ee66a58ff32dade331f

SHA256
13a31e4d4bb979d68c5f40177d3f5fe47644c36ff9f34055935d85363f2cdcba

SHA512
aa9fd932aaff39a2fe7216ee53dd2d474b13cfb133666d5c2dae1c1cbe63d8abadb697b771190d4cdd42bbb52c5dcbd279af43e0e232f0a59fbd4b5b01d3133f

Download Submit
memory/1036-0-0x000007FEF60F3000-0x000007FEF60F4000-memory.dmp

Filesize
4KB

Download
memory/1036-1-0x00000000009B0000-0x0000000000A1A000-memory.dmp

Filesize
424KB

Download
memory/2636-7-0x0000000000950000-0x00000000009BA000-memory.dmp

Filesize
424KB

Download
memory/2636-8-0x000007FEF5703000-0x000007FEF5704000-memory.dmp

Filesize
4KB

Download
memory/2636-26-0x000007FEF5700000-0x000007FEF60EC000-memory.dmp

Filesize
9.9MB

Download
memory/2636-480-0x000007FEF5703000-0x000007FEF5704000-memory.dmp

Filesize
4KB

Download
memory/2636-481-0x000007FEF5700000-0x000007FEF60EC000-memory.dmp

Filesize
9.9MB

Download