chaos | a2f989afcba6ea097fa104c313a1626bf6cdaffe80b000e247f36b8d3906acf6

Analysis

max time kernel
51s
max time network
53s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
15-06-2024 12:45

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General

Target

2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe
Size

331KB
MD5

1484bfc72f2a31fec076b48d4e687a98
SHA1

9f019893c50d17cd6b930112bb657254057eb694
SHA256

a2f989afcba6ea097fa104c313a1626bf6cdaffe80b000e247f36b8d3906acf6
SHA512

5e2d0ba2639af86b7b423b65cf2e16a7e2335da7c51e827f7f1f00f460f3a8c46b70f789f5d4264a58c17121424fa979307b60017e3a01726df4e0a65e0ced72
SSDEEP

1536:C3kIZridr9SHyB2CNaLGpf9aJfXgY1zUTyr5hV:C3kCidr9S0NaKpf+XgTTSj

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/3108-0-0x0000000000390000-0x00000000003E8000-memory.dmp	family_chaos
behavioral2/files/0x0012000000016964-6.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

Detects command variations typically used by ransomware 2 IoCs

resource	yara_rule
behavioral2/memory/3108-0-0x0000000000390000-0x00000000003E8000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral2/files/0x0012000000016964-6.dat	INDICATOR_SUSPICIOUS_GENRansomware

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
3812	bcdedit.exe
2608	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
1756	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	2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	rundll32.exe

Drops startup file 3 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini	rundll32.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ntdfrag.txt	rundll32.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\rundll32.url	rundll32.exe

Executes dropped EXE 1 IoCs

pid	Process
3744	rundll32.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\Downloads\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\Pictures\Camera Roll\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\Searches\desktop.ini	rundll32.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-4124900551-4068476067-3491212533-1000\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessibility\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\AccountPictures\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\Pictures\Saved Pictures\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\OneDrive\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\Videos\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\System Tools\Desktop.ini	rundll32.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	rundll32.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\\ub3wy9yf7.jpg"	rundll32.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
3648	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	rundll32.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
2256	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
3744	rundll32.exe

Suspicious behavior: EnumeratesProcesses 45 IoCs

pid	Process
3108	2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe
3108	2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe
3108	2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe
3108	2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe
3108	2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe
3108	2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe
3108	2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe
3108	2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe
3108	2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe
3108	2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe
3108	2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe
3108	2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe
3108	2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe
3108	2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe
3108	2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe
3108	2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe
3108	2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe
3108	2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe
3108	2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe
3108	2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe
3108	2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe
3108	2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe
3108	2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe
3744	rundll32.exe
3744	rundll32.exe
3744	rundll32.exe
3744	rundll32.exe
3744	rundll32.exe
3744	rundll32.exe
3744	rundll32.exe
3744	rundll32.exe
3744	rundll32.exe
3744	rundll32.exe
3744	rundll32.exe
3744	rundll32.exe
3744	rundll32.exe
3744	rundll32.exe
3744	rundll32.exe
3744	rundll32.exe
3744	rundll32.exe
3744	rundll32.exe
3744	rundll32.exe
3744	rundll32.exe
3744	rundll32.exe
3744	rundll32.exe

Suspicious use of AdjustPrivilegeToken 50 IoCs

description	pid	Process
Token: SeDebugPrivilege	3108	2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe
Token: SeDebugPrivilege	3744	rundll32.exe
Token: SeBackupPrivilege	4272	vssvc.exe
Token: SeRestorePrivilege	4272	vssvc.exe
Token: SeAuditPrivilege	4272	vssvc.exe
Token: SeIncreaseQuotaPrivilege	5004	WMIC.exe
Token: SeSecurityPrivilege	5004	WMIC.exe
Token: SeTakeOwnershipPrivilege	5004	WMIC.exe
Token: SeLoadDriverPrivilege	5004	WMIC.exe
Token: SeSystemProfilePrivilege	5004	WMIC.exe
Token: SeSystemtimePrivilege	5004	WMIC.exe
Token: SeProfSingleProcessPrivilege	5004	WMIC.exe
Token: SeIncBasePriorityPrivilege	5004	WMIC.exe
Token: SeCreatePagefilePrivilege	5004	WMIC.exe
Token: SeBackupPrivilege	5004	WMIC.exe
Token: SeRestorePrivilege	5004	WMIC.exe
Token: SeShutdownPrivilege	5004	WMIC.exe
Token: SeDebugPrivilege	5004	WMIC.exe
Token: SeSystemEnvironmentPrivilege	5004	WMIC.exe
Token: SeRemoteShutdownPrivilege	5004	WMIC.exe
Token: SeUndockPrivilege	5004	WMIC.exe
Token: SeManageVolumePrivilege	5004	WMIC.exe
Token: 33	5004	WMIC.exe
Token: 34	5004	WMIC.exe
Token: 35	5004	WMIC.exe
Token: 36	5004	WMIC.exe
Token: SeIncreaseQuotaPrivilege	5004	WMIC.exe
Token: SeSecurityPrivilege	5004	WMIC.exe
Token: SeTakeOwnershipPrivilege	5004	WMIC.exe
Token: SeLoadDriverPrivilege	5004	WMIC.exe
Token: SeSystemProfilePrivilege	5004	WMIC.exe
Token: SeSystemtimePrivilege	5004	WMIC.exe
Token: SeProfSingleProcessPrivilege	5004	WMIC.exe
Token: SeIncBasePriorityPrivilege	5004	WMIC.exe
Token: SeCreatePagefilePrivilege	5004	WMIC.exe
Token: SeBackupPrivilege	5004	WMIC.exe
Token: SeRestorePrivilege	5004	WMIC.exe
Token: SeShutdownPrivilege	5004	WMIC.exe
Token: SeDebugPrivilege	5004	WMIC.exe
Token: SeSystemEnvironmentPrivilege	5004	WMIC.exe
Token: SeRemoteShutdownPrivilege	5004	WMIC.exe
Token: SeUndockPrivilege	5004	WMIC.exe
Token: SeManageVolumePrivilege	5004	WMIC.exe
Token: 33	5004	WMIC.exe
Token: 34	5004	WMIC.exe
Token: 35	5004	WMIC.exe
Token: 36	5004	WMIC.exe
Token: SeBackupPrivilege	1040	wbengine.exe
Token: SeRestorePrivilege	1040	wbengine.exe
Token: SeSecurityPrivilege	1040	wbengine.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 3108 wrote to memory of 3744	3108	2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe	84
PID 3108 wrote to memory of 3744	3108	2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe	84
PID 3744 wrote to memory of 3148	3744	rundll32.exe	85
PID 3744 wrote to memory of 3148	3744	rundll32.exe	85
PID 3148 wrote to memory of 3648	3148	cmd.exe	87
PID 3148 wrote to memory of 3648	3148	cmd.exe	87
PID 3148 wrote to memory of 5004	3148	cmd.exe	90
PID 3148 wrote to memory of 5004	3148	cmd.exe	90
PID 3744 wrote to memory of 4516	3744	rundll32.exe	92
PID 3744 wrote to memory of 4516	3744	rundll32.exe	92
PID 4516 wrote to memory of 3812	4516	cmd.exe	94
PID 4516 wrote to memory of 3812	4516	cmd.exe	94
PID 4516 wrote to memory of 2608	4516	cmd.exe	95
PID 4516 wrote to memory of 2608	4516	cmd.exe	95
PID 3744 wrote to memory of 4456	3744	rundll32.exe	96
PID 3744 wrote to memory of 4456	3744	rundll32.exe	96
PID 4456 wrote to memory of 1756	4456	cmd.exe	98
PID 4456 wrote to memory of 1756	4456	cmd.exe	98
PID 3744 wrote to memory of 2256	3744	rundll32.exe	103
PID 3744 wrote to memory of 2256	3744	rundll32.exe	103

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\2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3108
- C:\Users\Admin\AppData\Roaming\rundll32.exe
  "C:\Users\Admin\AppData\Roaming\rundll32.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:3744
- - 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:3148
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:3648
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:5004
- - 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:4516
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:3812
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2608
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4456
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:1756
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\ntdfrag.txt
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:2256

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4272

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1040

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:4224

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
- Checks SCSI registry key(s)
PID:1792

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\rundll32.exe

Filesize
331KB

MD5
1484bfc72f2a31fec076b48d4e687a98

SHA1
9f019893c50d17cd6b930112bb657254057eb694

SHA256
a2f989afcba6ea097fa104c313a1626bf6cdaffe80b000e247f36b8d3906acf6

SHA512
5e2d0ba2639af86b7b423b65cf2e16a7e2335da7c51e827f7f1f00f460f3a8c46b70f789f5d4264a58c17121424fa979307b60017e3a01726df4e0a65e0ced72

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

Filesize
417B

MD5
472fc50a9628a8c68903831262a89cd4

SHA1
aba3be175059e58ea67f458b9e8b5540183e7f0e

SHA256
7a9aa52e802f5d0956814597d1b9317a393ab68bac6324cefbbf21869a884923

SHA512
9b16767e9cc421982638428043ddef638e9a7f2ff0d67ce52909486f9d8f88e9b4e988bdd93eabfa6472ce99528afc21f9c4c7510fe5c72ec5572b19536446ba

Download Submit
memory/3108-0-0x0000000000390000-0x00000000003E8000-memory.dmp

Filesize
352KB

Download
memory/3108-1-0x00007FFF7CB13000-0x00007FFF7CB15000-memory.dmp

Filesize
8KB

Download
memory/3744-14-0x00007FFF7CB10000-0x00007FFF7D5D1000-memory.dmp

Filesize
10.8MB

Download
memory/3744-69-0x00007FFF7CB10000-0x00007FFF7D5D1000-memory.dmp

Filesize
10.8MB

Download
memory/3744-70-0x00007FFF7CB10000-0x00007FFF7D5D1000-memory.dmp

Filesize
10.8MB

Download