chaos | 438764714bb650393cdeba7bfa9e0ba039cd566fc35e4565dc2855d1e086f16d

Analysis

max time kernel
146s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240802-en
resource tags

arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
submitted
12-08-2024 00:19

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General

Target

Random.exe
Size

32KB
MD5

aec65cd697c52926d76f888c0f1958b2
SHA1

603b2537703cfc6c4addf8ef1480ce33601f6117
SHA256

438764714bb650393cdeba7bfa9e0ba039cd566fc35e4565dc2855d1e086f16d
SHA512

c1a5d23b5cd9b378a6031c6ca1bfe65da424bb60c9e404401ca139eee1a3e6f78fc1bae1f38e493ccd3fcaa7b905b6caab2a36d19648acf76e63874df48278a4
SSDEEP

384:h3MLWHn3kI9a0JI8ITMpypoGroX3Jxr91CppZkM5hEM5eF:hn3kItJInTMpxMs5xr9OpZkM5hE2eF

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 2 IoCs

resource	yara_rule
behavioral1/memory/4940-1-0x00000000006E0000-0x00000000006EE000-memory.dmp	family_chaos
behavioral1/files/0x000200000002aa72-6.dat	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
3100	bcdedit.exe
2924	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
1004	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_it.txt	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1592	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

Drops desktop.ini file(s) 34 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\Pictures\Saved Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\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\Start Menu\Programs\Maintenance\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\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\Searches\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessibility\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\Internet Explorer\Quick Launch\User Pinned\TaskBar\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	C:\Users\Public\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\Camera Roll\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\OneDrive\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\SendTo\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\Music\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\AccountPictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-6179872-1886041298-1573312864-1000\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\Internet Explorer\Quick Launch\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\System Tools\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\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\Start Menu\Programs\Administrative Tools\desktop.ini	svchost.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Checks SCSI registry key(s) 3 TTPs 4 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CDROM&VEN_QEMU&PROD_QEMU_DVD-ROM\4&215468A5&0&010000	vds.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_QEMU&Prod_QEMU_DVD-ROM\4&215468a5&0&010000\FriendlyName	vds.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\DISK&VEN_WDC&PROD_WDS100T2B0A\4&215468A5&0&000000	vds.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\FriendlyName	vds.exe

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
4236	vssadmin.exe

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-6179872-1886041298-1573312864-1000_Classes\Local Settings	svchost.exe
Key created	\REGISTRY\USER\S-1-5-21-6179872-1886041298-1573312864-1000_Classes\Local Settings\MuiCache	MiniSearchHost.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
4348	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1592	svchost.exe

Suspicious behavior: EnumeratesProcesses 41 IoCs

pid	Process
4940	Random.exe
4940	Random.exe
4940	Random.exe
4940	Random.exe
4940	Random.exe
4940	Random.exe
4940	Random.exe
4940	Random.exe
4940	Random.exe
4940	Random.exe
4940	Random.exe
4940	Random.exe
4940	Random.exe
4940	Random.exe
4940	Random.exe
4940	Random.exe
4940	Random.exe
4940	Random.exe
4940	Random.exe
1592	svchost.exe
1592	svchost.exe
1592	svchost.exe
1592	svchost.exe
1592	svchost.exe
1592	svchost.exe
1592	svchost.exe
1592	svchost.exe
1592	svchost.exe
1592	svchost.exe
1592	svchost.exe
1592	svchost.exe
1592	svchost.exe
1592	svchost.exe
1592	svchost.exe
1592	svchost.exe
1592	svchost.exe
1592	svchost.exe
1592	svchost.exe
1592	svchost.exe
1592	svchost.exe
1592	svchost.exe

Suspicious use of AdjustPrivilegeToken 50 IoCs

description	pid	Process
Token: SeDebugPrivilege	4940	Random.exe
Token: SeDebugPrivilege	1592	svchost.exe
Token: SeBackupPrivilege	240	vssvc.exe
Token: SeRestorePrivilege	240	vssvc.exe
Token: SeAuditPrivilege	240	vssvc.exe
Token: SeIncreaseQuotaPrivilege	3312	WMIC.exe
Token: SeSecurityPrivilege	3312	WMIC.exe
Token: SeTakeOwnershipPrivilege	3312	WMIC.exe
Token: SeLoadDriverPrivilege	3312	WMIC.exe
Token: SeSystemProfilePrivilege	3312	WMIC.exe
Token: SeSystemtimePrivilege	3312	WMIC.exe
Token: SeProfSingleProcessPrivilege	3312	WMIC.exe
Token: SeIncBasePriorityPrivilege	3312	WMIC.exe
Token: SeCreatePagefilePrivilege	3312	WMIC.exe
Token: SeBackupPrivilege	3312	WMIC.exe
Token: SeRestorePrivilege	3312	WMIC.exe
Token: SeShutdownPrivilege	3312	WMIC.exe
Token: SeDebugPrivilege	3312	WMIC.exe
Token: SeSystemEnvironmentPrivilege	3312	WMIC.exe
Token: SeRemoteShutdownPrivilege	3312	WMIC.exe
Token: SeUndockPrivilege	3312	WMIC.exe
Token: SeManageVolumePrivilege	3312	WMIC.exe
Token: 33	3312	WMIC.exe
Token: 34	3312	WMIC.exe
Token: 35	3312	WMIC.exe
Token: 36	3312	WMIC.exe
Token: SeIncreaseQuotaPrivilege	3312	WMIC.exe
Token: SeSecurityPrivilege	3312	WMIC.exe
Token: SeTakeOwnershipPrivilege	3312	WMIC.exe
Token: SeLoadDriverPrivilege	3312	WMIC.exe
Token: SeSystemProfilePrivilege	3312	WMIC.exe
Token: SeSystemtimePrivilege	3312	WMIC.exe
Token: SeProfSingleProcessPrivilege	3312	WMIC.exe
Token: SeIncBasePriorityPrivilege	3312	WMIC.exe
Token: SeCreatePagefilePrivilege	3312	WMIC.exe
Token: SeBackupPrivilege	3312	WMIC.exe
Token: SeRestorePrivilege	3312	WMIC.exe
Token: SeShutdownPrivilege	3312	WMIC.exe
Token: SeDebugPrivilege	3312	WMIC.exe
Token: SeSystemEnvironmentPrivilege	3312	WMIC.exe
Token: SeRemoteShutdownPrivilege	3312	WMIC.exe
Token: SeUndockPrivilege	3312	WMIC.exe
Token: SeManageVolumePrivilege	3312	WMIC.exe
Token: 33	3312	WMIC.exe
Token: 34	3312	WMIC.exe
Token: 35	3312	WMIC.exe
Token: 36	3312	WMIC.exe
Token: SeBackupPrivilege	3672	wbengine.exe
Token: SeRestorePrivilege	3672	wbengine.exe
Token: SeSecurityPrivilege	3672	wbengine.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4032	MiniSearchHost.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 4940 wrote to memory of 1592	4940	Random.exe	88
PID 4940 wrote to memory of 1592	4940	Random.exe	88
PID 1592 wrote to memory of 4672	1592	svchost.exe	89
PID 1592 wrote to memory of 4672	1592	svchost.exe	89
PID 4672 wrote to memory of 4236	4672	cmd.exe	91
PID 4672 wrote to memory of 4236	4672	cmd.exe	91
PID 4672 wrote to memory of 3312	4672	cmd.exe	94
PID 4672 wrote to memory of 3312	4672	cmd.exe	94
PID 1592 wrote to memory of 4340	1592	svchost.exe	96
PID 1592 wrote to memory of 4340	1592	svchost.exe	96
PID 4340 wrote to memory of 3100	4340	cmd.exe	98
PID 4340 wrote to memory of 3100	4340	cmd.exe	98
PID 4340 wrote to memory of 2924	4340	cmd.exe	99
PID 4340 wrote to memory of 2924	4340	cmd.exe	99
PID 1592 wrote to memory of 1792	1592	svchost.exe	100
PID 1592 wrote to memory of 1792	1592	svchost.exe	100
PID 1792 wrote to memory of 1004	1792	cmd.exe	102
PID 1792 wrote to memory of 1004	1792	cmd.exe	102
PID 1592 wrote to memory of 4348	1592	svchost.exe	106
PID 1592 wrote to memory of 4348	1592	svchost.exe	106

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\Random.exe
"C:\Users\Admin\AppData\Local\Temp\Random.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4940
- 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)
  - Modifies registry class
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1592
- - 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:4672
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:4236
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:3312
- - 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:4340
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:3100
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2924
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1792
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:1004
- - 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:4348

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:240

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3672

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:4392

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
- Checks SCSI registry key(s)
PID:1732

C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe
"C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe" -ServerName:MiniSearchUI.AppXj3y73at8fy1htwztzxs68sxx1v7cksp7.mca
1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:4032

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:1080

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

Peripheral Device Discovery

T1120

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\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\TempState\SearchHoverUnifiedTileModelCache.dat

Filesize
10KB

MD5
eed1599235b9dd933e13cbd5751d7eec

SHA1
d461f7edc8bdb31b672f97b18d34e38bb7c96c4b

SHA256
13ee96f0fd8b45de1603cea7aa86ddaa749ea580989d6cb806d944f3547fbf43

SHA512
9679690676ef1ede8030e26359381a092eaec7cb671d51e91d8cd446006301bcb98518b977fd5d475e777baa11dd28e69135c517e3b3d74475134bfed4e8da9e

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

Filesize
32KB

MD5
aec65cd697c52926d76f888c0f1958b2

SHA1
603b2537703cfc6c4addf8ef1480ce33601f6117

SHA256
438764714bb650393cdeba7bfa9e0ba039cd566fc35e4565dc2855d1e086f16d

SHA512
c1a5d23b5cd9b378a6031c6ca1bfe65da424bb60c9e404401ca139eee1a3e6f78fc1bae1f38e493ccd3fcaa7b905b6caab2a36d19648acf76e63874df48278a4

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

Filesize
6KB

MD5
fd2a0bdc9a576617d725d35784a6a824

SHA1
d08aed0fe2d1ace2a1bb466fb90826fc1e8d8e3b

SHA256
22ae9851e674f1b329ce25601e242406886c9000f51823ecddea9ec1b9276918

SHA512
20ebf1c2e225644b6a9577c9a07bb8e06edaf93729f8bc472b004b79a6b19f5c5d45b6f4f3a36d86a9354bf360b27ed118cba76596dcbe915c8ba28897ac6e77

Download Submit
memory/1592-14-0x00007FFDEC050000-0x00007FFDECB12000-memory.dmp

Filesize
10.8MB

Download
memory/1592-76-0x00007FFDEC050000-0x00007FFDECB12000-memory.dmp

Filesize
10.8MB

Download
memory/4940-0-0x00007FFDEC053000-0x00007FFDEC055000-memory.dmp

Filesize
8KB

Download
memory/4940-1-0x00000000006E0000-0x00000000006EE000-memory.dmp

Filesize
56KB

Download