chaos | c3cb824c21f93e55a2e8e15e431d9ebaee35b6a85f2764abf95e84dea4b6b765

Resubmissions

09/04/2024, 09:28

240409-lfmckseh9z 10

09/04/2024, 09:23

240409-lcyanseh5t 10

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
09/04/2024, 09:23

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General

Target

2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe
Size

1.9MB
MD5

6351587d8a4d02af63204e1f49b5ba56
SHA1

b0c64954ab96ba600ee37c37cfeacc43d04b0959
SHA256

c3cb824c21f93e55a2e8e15e431d9ebaee35b6a85f2764abf95e84dea4b6b765
SHA512

31f945a0b3a1602fa3e1766ee54fbdbaacd46942e7db304a179d5ed553a07649dddcb9c44c91d3a4e085c589f2bd1e0bc3064e12606418d89149b478e57204a7
SSDEEP

24576:o9/D6y/1yOeoErA7vMajzGDX9uZTUir0XZQQ3ffTRuNd7Ciq9VII7OQ:o9bIowAj53aXUZTZeQQwA5z

Score

10^/10

chaos evasion 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/3068-0-0x00000000009C0000-0x0000000000BA8000-memory.dmp	family_chaos
behavioral2/files/0x0003000000023052-6.dat	family_chaos

Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware

File Deletion
T1070.004

Inhibit System Recovery
T1490

Detects command variations typically used by ransomware 2 IoCs

resource	yara_rule
behavioral2/memory/3068-0-0x00000000009C0000-0x0000000000BA8000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral2/files/0x0003000000023052-6.dat	INDICATOR_SUSPICIOUS_GENRansomware

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
2032	bcdedit.exe
4784	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
440	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-1-5-21-566096764-1992588923-1249862864-1000\Control Panel\International\Geo\Nation	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe
Key value queried	\REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\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\read_it.txt	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1812	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	F:\$RECYCLE.BIN\S-1-5-21-566096764-1992588923-1249862864-1000\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\OneDrive\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\Programs\Administrative Tools\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Saved Games\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\Maintenance\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\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\Start Menu\Programs\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\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\AccountPictures\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\Videos\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\Public\Pictures\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\Public\Desktop\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\AppData\Roaming\Microsoft\Windows\Start Menu\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\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\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-1-5-21-566096764-1992588923-1249862864-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\cvtod1hz1.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_DADY&PROD_DADY_DVD-ROM\4&215468A5&0&010000	vds.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_DADY&Prod_DADY_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
3456	vssadmin.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000_Classes\Local Settings	svchost.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
3112	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1812	svchost.exe

Suspicious behavior: EnumeratesProcesses 51 IoCs

pid	Process
3068	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe
3068	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe
3068	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe
3068	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe
3068	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe
3068	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe
3068	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe
3068	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe
3068	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe
3068	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe
3068	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe
3068	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe
3068	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe
3068	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe
3068	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe
3068	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe
3068	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe
3068	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe
3068	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe
3068	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe
3068	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe
3068	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe
3068	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe
3068	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe
3068	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe
1812	svchost.exe
1812	svchost.exe
1812	svchost.exe
1812	svchost.exe
1812	svchost.exe
1812	svchost.exe
1812	svchost.exe
1812	svchost.exe
1812	svchost.exe
1812	svchost.exe
1812	svchost.exe
1812	svchost.exe
1812	svchost.exe
1812	svchost.exe
1812	svchost.exe
1812	svchost.exe
1812	svchost.exe
1812	svchost.exe
1812	svchost.exe
1812	svchost.exe
1812	svchost.exe
1812	svchost.exe
1812	svchost.exe
1812	svchost.exe
1812	svchost.exe
1812	svchost.exe

Suspicious use of AdjustPrivilegeToken 50 IoCs

description	pid	Process
Token: SeDebugPrivilege	3068	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe
Token: SeDebugPrivilege	1812	svchost.exe
Token: SeBackupPrivilege	4696	vssvc.exe
Token: SeRestorePrivilege	4696	vssvc.exe
Token: SeAuditPrivilege	4696	vssvc.exe
Token: SeIncreaseQuotaPrivilege	4964	WMIC.exe
Token: SeSecurityPrivilege	4964	WMIC.exe
Token: SeTakeOwnershipPrivilege	4964	WMIC.exe
Token: SeLoadDriverPrivilege	4964	WMIC.exe
Token: SeSystemProfilePrivilege	4964	WMIC.exe
Token: SeSystemtimePrivilege	4964	WMIC.exe
Token: SeProfSingleProcessPrivilege	4964	WMIC.exe
Token: SeIncBasePriorityPrivilege	4964	WMIC.exe
Token: SeCreatePagefilePrivilege	4964	WMIC.exe
Token: SeBackupPrivilege	4964	WMIC.exe
Token: SeRestorePrivilege	4964	WMIC.exe
Token: SeShutdownPrivilege	4964	WMIC.exe
Token: SeDebugPrivilege	4964	WMIC.exe
Token: SeSystemEnvironmentPrivilege	4964	WMIC.exe
Token: SeRemoteShutdownPrivilege	4964	WMIC.exe
Token: SeUndockPrivilege	4964	WMIC.exe
Token: SeManageVolumePrivilege	4964	WMIC.exe
Token: 33	4964	WMIC.exe
Token: 34	4964	WMIC.exe
Token: 35	4964	WMIC.exe
Token: 36	4964	WMIC.exe
Token: SeIncreaseQuotaPrivilege	4964	WMIC.exe
Token: SeSecurityPrivilege	4964	WMIC.exe
Token: SeTakeOwnershipPrivilege	4964	WMIC.exe
Token: SeLoadDriverPrivilege	4964	WMIC.exe
Token: SeSystemProfilePrivilege	4964	WMIC.exe
Token: SeSystemtimePrivilege	4964	WMIC.exe
Token: SeProfSingleProcessPrivilege	4964	WMIC.exe
Token: SeIncBasePriorityPrivilege	4964	WMIC.exe
Token: SeCreatePagefilePrivilege	4964	WMIC.exe
Token: SeBackupPrivilege	4964	WMIC.exe
Token: SeRestorePrivilege	4964	WMIC.exe
Token: SeShutdownPrivilege	4964	WMIC.exe
Token: SeDebugPrivilege	4964	WMIC.exe
Token: SeSystemEnvironmentPrivilege	4964	WMIC.exe
Token: SeRemoteShutdownPrivilege	4964	WMIC.exe
Token: SeUndockPrivilege	4964	WMIC.exe
Token: SeManageVolumePrivilege	4964	WMIC.exe
Token: 33	4964	WMIC.exe
Token: 34	4964	WMIC.exe
Token: 35	4964	WMIC.exe
Token: 36	4964	WMIC.exe
Token: SeBackupPrivilege	1200	wbengine.exe
Token: SeRestorePrivilege	1200	wbengine.exe
Token: SeSecurityPrivilege	1200	wbengine.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 3068 wrote to memory of 1812	3068	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe	90
PID 3068 wrote to memory of 1812	3068	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe	90
PID 1812 wrote to memory of 4040	1812	svchost.exe	95
PID 1812 wrote to memory of 4040	1812	svchost.exe	95
PID 4040 wrote to memory of 3456	4040	cmd.exe	97
PID 4040 wrote to memory of 3456	4040	cmd.exe	97
PID 4040 wrote to memory of 4964	4040	cmd.exe	100
PID 4040 wrote to memory of 4964	4040	cmd.exe	100
PID 1812 wrote to memory of 5036	1812	svchost.exe	101
PID 1812 wrote to memory of 5036	1812	svchost.exe	101
PID 5036 wrote to memory of 2032	5036	cmd.exe	103
PID 5036 wrote to memory of 2032	5036	cmd.exe	103
PID 5036 wrote to memory of 4784	5036	cmd.exe	104
PID 5036 wrote to memory of 4784	5036	cmd.exe	104
PID 1812 wrote to memory of 2636	1812	svchost.exe	105
PID 1812 wrote to memory of 2636	1812	svchost.exe	105
PID 2636 wrote to memory of 440	2636	cmd.exe	107
PID 2636 wrote to memory of 440	2636	cmd.exe	107
PID 1812 wrote to memory of 3112	1812	svchost.exe	112
PID 1812 wrote to memory of 3112	1812	svchost.exe	112

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\2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3068
- 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:1812
- - 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:4040
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:3456
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:4964
- - 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:5036
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2032
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:4784
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2636
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:440
- - 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:3112

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4696

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1200

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:4304

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
- Checks SCSI registry key(s)
PID:5028

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

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
1.9MB

MD5
6351587d8a4d02af63204e1f49b5ba56

SHA1
b0c64954ab96ba600ee37c37cfeacc43d04b0959

SHA256
c3cb824c21f93e55a2e8e15e431d9ebaee35b6a85f2764abf95e84dea4b6b765

SHA512
31f945a0b3a1602fa3e1766ee54fbdbaacd46942e7db304a179d5ed553a07649dddcb9c44c91d3a4e085c589f2bd1e0bc3064e12606418d89149b478e57204a7

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

Filesize
870B

MD5
4f4a1d049c7d46b5d3196bae54db0c76

SHA1
3952e4327a7302ce60de180cd612df56c94b40a8

SHA256
ff42e4254c02143eecd9544fb72620ca49b40a0b5830c17099150a97fad9eb5c

SHA512
2ea06eca3d60c7011f44a637a4d097f1165093a1e80d075ed177d6ef4c68320a27ff0db0afbdd110db2adf58312c90f6efef493882d36dedaef8c5a18bb50483

Download Submit
memory/1812-15-0x00007FFD76520000-0x00007FFD76FE1000-memory.dmp

Filesize
10.8MB

Download
memory/1812-442-0x00007FFD76520000-0x00007FFD76FE1000-memory.dmp

Filesize
10.8MB

Download
memory/3068-0-0x00000000009C0000-0x0000000000BA8000-memory.dmp

Filesize
1.9MB

Download
memory/3068-1-0x00007FFD76520000-0x00007FFD76FE1000-memory.dmp

Filesize
10.8MB

Download
memory/3068-14-0x00007FFD76520000-0x00007FFD76FE1000-memory.dmp

Filesize
10.8MB

Download