chaos | 524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4

Analysis

max time kernel
144s
max time network
136s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
25-05-2024 13:30

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General

Target

2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe
Size

3.2MB
MD5

db5c28ec647afd894c01422584d551a5
SHA1

fa0b5ebcb983509eebc7222725792976fad2aca8
SHA256

524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4
SHA512

730054505deddeeefce4b1cc3b8ea362946e9e12ea289bc64285c0ce417d8964a767d03ccdf69ab4dd184d9888b9f3c1b51134cfb9c067861b5c1f4c06a3f67a
SSDEEP

24576:s0JR6V45PL2ybTlBpPcmtR9tArJms0dIU1wuKav4WgNFlLKKDGyMgl+ICHusEd:5iylZ9tAcBSGgJtAZu

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
behavioral2/memory/4436-1-0x0000000000600000-0x000000000093C000-memory.dmp	family_chaos
behavioral2/files/0x00090000000233bf-7.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

Detects command variations typically used by ransomware 2 IoCs

resource	yara_rule
behavioral2/memory/4436-1-0x0000000000600000-0x000000000093C000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral2/files/0x00090000000233bf-7.dat	INDICATOR_SUSPICIOUS_GENRansomware

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
4908	bcdedit.exe
3508	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
2776	wbadmin.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	svchost.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\Leggimi.txt	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3648	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\Contacts\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\Internet Explorer\Quick Launch\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\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\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\Accessibility\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\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-4124900551-4068476067-3491212533-1000\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\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\Admin\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\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\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\Saved Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\OneDrive\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Desktop\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\Programs\Maintenance\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\Camera Roll\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\System Tools\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\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\Windows\AccountPictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\desktop.ini	svchost.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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\uufm8kwkz.jpg"	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\DISK&VEN_DADY&PROD_HARDDISK\4&215468A5&0&000000	vds.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\FriendlyName	vds.exe
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

Interacts with shadow copies 2 TTPs 1 IoCs

Shadow copies are often targeted by ransomware to inhibit system recovery.

ransomware

File Deletion

T1070.004

Inhibit System Recovery

T1490

pid	Process
3604	vssadmin.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000_Classes\Local Settings	svchost.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
4468	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
3648	svchost.exe

Suspicious behavior: EnumeratesProcesses 48 IoCs

pid	Process
4436	2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe
4436	2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe
4436	2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe
4436	2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe
4436	2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe
4436	2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe
4436	2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe
4436	2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe
4436	2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe
4436	2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe
4436	2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe
4436	2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe
4436	2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe
4436	2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe
4436	2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe
4436	2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe
4436	2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe
4436	2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe
4436	2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe
4436	2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe
4436	2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe
4436	2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe
4436	2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe
4436	2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe
4436	2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe
4436	2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe
3648	svchost.exe
3648	svchost.exe
3648	svchost.exe
3648	svchost.exe
3648	svchost.exe
3648	svchost.exe
3648	svchost.exe
3648	svchost.exe
3648	svchost.exe
3648	svchost.exe
3648	svchost.exe
3648	svchost.exe
3648	svchost.exe
3648	svchost.exe
3648	svchost.exe
3648	svchost.exe
3648	svchost.exe
3648	svchost.exe
3648	svchost.exe
3648	svchost.exe
3648	svchost.exe
3648	svchost.exe

Suspicious use of AdjustPrivilegeToken 50 IoCs

description	pid	Process
Token: SeDebugPrivilege	4436	2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe
Token: SeDebugPrivilege	3648	svchost.exe
Token: SeBackupPrivilege	1356	vssvc.exe
Token: SeRestorePrivilege	1356	vssvc.exe
Token: SeAuditPrivilege	1356	vssvc.exe
Token: SeIncreaseQuotaPrivilege	4540	WMIC.exe
Token: SeSecurityPrivilege	4540	WMIC.exe
Token: SeTakeOwnershipPrivilege	4540	WMIC.exe
Token: SeLoadDriverPrivilege	4540	WMIC.exe
Token: SeSystemProfilePrivilege	4540	WMIC.exe
Token: SeSystemtimePrivilege	4540	WMIC.exe
Token: SeProfSingleProcessPrivilege	4540	WMIC.exe
Token: SeIncBasePriorityPrivilege	4540	WMIC.exe
Token: SeCreatePagefilePrivilege	4540	WMIC.exe
Token: SeBackupPrivilege	4540	WMIC.exe
Token: SeRestorePrivilege	4540	WMIC.exe
Token: SeShutdownPrivilege	4540	WMIC.exe
Token: SeDebugPrivilege	4540	WMIC.exe
Token: SeSystemEnvironmentPrivilege	4540	WMIC.exe
Token: SeRemoteShutdownPrivilege	4540	WMIC.exe
Token: SeUndockPrivilege	4540	WMIC.exe
Token: SeManageVolumePrivilege	4540	WMIC.exe
Token: 33	4540	WMIC.exe
Token: 34	4540	WMIC.exe
Token: 35	4540	WMIC.exe
Token: 36	4540	WMIC.exe
Token: SeIncreaseQuotaPrivilege	4540	WMIC.exe
Token: SeSecurityPrivilege	4540	WMIC.exe
Token: SeTakeOwnershipPrivilege	4540	WMIC.exe
Token: SeLoadDriverPrivilege	4540	WMIC.exe
Token: SeSystemProfilePrivilege	4540	WMIC.exe
Token: SeSystemtimePrivilege	4540	WMIC.exe
Token: SeProfSingleProcessPrivilege	4540	WMIC.exe
Token: SeIncBasePriorityPrivilege	4540	WMIC.exe
Token: SeCreatePagefilePrivilege	4540	WMIC.exe
Token: SeBackupPrivilege	4540	WMIC.exe
Token: SeRestorePrivilege	4540	WMIC.exe
Token: SeShutdownPrivilege	4540	WMIC.exe
Token: SeDebugPrivilege	4540	WMIC.exe
Token: SeSystemEnvironmentPrivilege	4540	WMIC.exe
Token: SeRemoteShutdownPrivilege	4540	WMIC.exe
Token: SeUndockPrivilege	4540	WMIC.exe
Token: SeManageVolumePrivilege	4540	WMIC.exe
Token: 33	4540	WMIC.exe
Token: 34	4540	WMIC.exe
Token: 35	4540	WMIC.exe
Token: 36	4540	WMIC.exe
Token: SeBackupPrivilege	4732	wbengine.exe
Token: SeRestorePrivilege	4732	wbengine.exe
Token: SeSecurityPrivilege	4732	wbengine.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 4436 wrote to memory of 3648	4436	2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe	98
PID 4436 wrote to memory of 3648	4436	2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe	98
PID 3648 wrote to memory of 3548	3648	svchost.exe	100
PID 3648 wrote to memory of 3548	3648	svchost.exe	100
PID 3548 wrote to memory of 3604	3548	cmd.exe	102
PID 3548 wrote to memory of 3604	3548	cmd.exe	102
PID 3548 wrote to memory of 4540	3548	cmd.exe	105
PID 3548 wrote to memory of 4540	3548	cmd.exe	105
PID 3648 wrote to memory of 4228	3648	svchost.exe	106
PID 3648 wrote to memory of 4228	3648	svchost.exe	106
PID 4228 wrote to memory of 4908	4228	cmd.exe	108
PID 4228 wrote to memory of 4908	4228	cmd.exe	108
PID 4228 wrote to memory of 3508	4228	cmd.exe	109
PID 4228 wrote to memory of 3508	4228	cmd.exe	109
PID 3648 wrote to memory of 4504	3648	svchost.exe	110
PID 3648 wrote to memory of 4504	3648	svchost.exe	110
PID 4504 wrote to memory of 2776	4504	cmd.exe	112
PID 4504 wrote to memory of 2776	4504	cmd.exe	112
PID 3648 wrote to memory of 4468	3648	svchost.exe	116
PID 3648 wrote to memory of 4468	3648	svchost.exe	116

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\2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4436
- C:\Users\Admin\AppData\Roaming\svchost.exe
  "C:\Users\Admin\AppData\Roaming\svchost.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Drops desktop.ini file(s)
  - Sets desktop wallpaper using registry
  - Modifies registry class
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3648
- - 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:3548
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:3604
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:4540
- - 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:4228
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:4908
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:3508
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4504
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:2776
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\Leggimi.txt
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:4468

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1356

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4732

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:3376

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
- Checks SCSI registry key(s)
PID:3960

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

Indicator Removal

T1070

File Deletion

T1070.004

Modify Registry

T1112

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

Defacement

T1491

Inhibit System Recovery

T1490

Replay Monitor

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Downloads

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

Filesize
3.2MB

MD5
db5c28ec647afd894c01422584d551a5

SHA1
fa0b5ebcb983509eebc7222725792976fad2aca8

SHA256
524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4

SHA512
730054505deddeeefce4b1cc3b8ea362946e9e12ea289bc64285c0ce417d8964a767d03ccdf69ab4dd184d9888b9f3c1b51134cfb9c067861b5c1f4c06a3f67a

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

Filesize
437B

MD5
9c5d9fd5db486b31324ad8eef0558c1b

SHA1
4d6e0b43ae59b8420730294d371118d6e429157f

SHA256
1f2154533308355548ad3694f03cc1582bc0aa549173a5d11920ac38469d6f3b

SHA512
b5c27756cbf8756dcfea07c6134e8711b61fcaa87360056609d65354e845adf2f00bc05140bf40044675b7c6cc7ef0b546bad3886a4cf34d12251570b49e80f7

Download Submit
memory/3648-15-0x00007FF96DF70000-0x00007FF96EA31000-memory.dmp

Filesize
10.8MB

Download
memory/3648-487-0x00007FF96DF70000-0x00007FF96EA31000-memory.dmp

Filesize
10.8MB

Download
memory/4436-0-0x00007FF96DF73000-0x00007FF96DF75000-memory.dmp

Filesize
8KB

Download
memory/4436-1-0x0000000000600000-0x000000000093C000-memory.dmp

Filesize
3.2MB

Download
memory/4436-2-0x00007FF96DF73000-0x00007FF96DF75000-memory.dmp

Filesize
8KB

Download