chaos | be41b813b1af4634ec14cb822090bb16e300dc61f478c473ac3b18e6dc025150

Analysis

max time kernel
135s
max time network
106s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
23-10-2024 23:41

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General

Target

2024-10-23_af70883f7ff9f9c19286ed07972bab84_wannacry.exe
Size

142KB
MD5

af70883f7ff9f9c19286ed07972bab84
SHA1

5d59cc33696cdc78f59448f2f6fb6cb08622b976
SHA256

be41b813b1af4634ec14cb822090bb16e300dc61f478c473ac3b18e6dc025150
SHA512

bfea6fa338ad9bb2be18a7fe1398d82f01258be0f57a3f2129a2b3e08342771faca874dcf0f257b54b14c49003789f139fe8fe9e5ca6b53d352670f6549438d1
SSDEEP

3072:o3kGRr9i0TVKIe6m8sdpcL0uhq70NEqj5Swo29V56K+Olhly3UdcHkl:+r9i0sIF5gdQubv29V56K+ihly3MN

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/1692-1-0x0000000000D70000-0x0000000000D9A000-memory.dmp	family_chaos
behavioral2/files/0x0003000000022a8a-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
2136	bcdedit.exe
5108	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
3520	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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	2024-10-23_af70883f7ff9f9c19286ed07972bab84_wannacry.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	svchoster.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	svchoster.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\read_it.txt	svchoster.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchoster.url	svchoster.exe

Executes dropped EXE 1 IoCs

pid	Process
2072	svchoster.exe

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

Drops desktop.ini file(s) 34 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\Music\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\System Tools\Desktop.ini	svchoster.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	svchoster.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-4089630652-1596403869-279772308-1000\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\Pictures\Camera Roll\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessibility\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\Videos\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\OneDrive\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\AccountPictures\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\Pictures\Saved Pictures\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\Searches\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	svchoster.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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\4jjg6vx20.jpg"	svchoster.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_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
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 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
1616	vssadmin.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings	svchoster.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
4328	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2072	svchoster.exe

Suspicious behavior: EnumeratesProcesses 51 IoCs

pid	Process
1692	2024-10-23_af70883f7ff9f9c19286ed07972bab84_wannacry.exe
1692	2024-10-23_af70883f7ff9f9c19286ed07972bab84_wannacry.exe
1692	2024-10-23_af70883f7ff9f9c19286ed07972bab84_wannacry.exe
1692	2024-10-23_af70883f7ff9f9c19286ed07972bab84_wannacry.exe
1692	2024-10-23_af70883f7ff9f9c19286ed07972bab84_wannacry.exe
1692	2024-10-23_af70883f7ff9f9c19286ed07972bab84_wannacry.exe
1692	2024-10-23_af70883f7ff9f9c19286ed07972bab84_wannacry.exe
1692	2024-10-23_af70883f7ff9f9c19286ed07972bab84_wannacry.exe
1692	2024-10-23_af70883f7ff9f9c19286ed07972bab84_wannacry.exe
1692	2024-10-23_af70883f7ff9f9c19286ed07972bab84_wannacry.exe
1692	2024-10-23_af70883f7ff9f9c19286ed07972bab84_wannacry.exe
1692	2024-10-23_af70883f7ff9f9c19286ed07972bab84_wannacry.exe
1692	2024-10-23_af70883f7ff9f9c19286ed07972bab84_wannacry.exe
1692	2024-10-23_af70883f7ff9f9c19286ed07972bab84_wannacry.exe
1692	2024-10-23_af70883f7ff9f9c19286ed07972bab84_wannacry.exe
1692	2024-10-23_af70883f7ff9f9c19286ed07972bab84_wannacry.exe
1692	2024-10-23_af70883f7ff9f9c19286ed07972bab84_wannacry.exe
1692	2024-10-23_af70883f7ff9f9c19286ed07972bab84_wannacry.exe
1692	2024-10-23_af70883f7ff9f9c19286ed07972bab84_wannacry.exe
1692	2024-10-23_af70883f7ff9f9c19286ed07972bab84_wannacry.exe
1692	2024-10-23_af70883f7ff9f9c19286ed07972bab84_wannacry.exe
1692	2024-10-23_af70883f7ff9f9c19286ed07972bab84_wannacry.exe
1692	2024-10-23_af70883f7ff9f9c19286ed07972bab84_wannacry.exe
1692	2024-10-23_af70883f7ff9f9c19286ed07972bab84_wannacry.exe
1692	2024-10-23_af70883f7ff9f9c19286ed07972bab84_wannacry.exe
2072	svchoster.exe
2072	svchoster.exe
2072	svchoster.exe
2072	svchoster.exe
2072	svchoster.exe
2072	svchoster.exe
2072	svchoster.exe
2072	svchoster.exe
2072	svchoster.exe
2072	svchoster.exe
2072	svchoster.exe
2072	svchoster.exe
2072	svchoster.exe
2072	svchoster.exe
2072	svchoster.exe
2072	svchoster.exe
2072	svchoster.exe
2072	svchoster.exe
2072	svchoster.exe
2072	svchoster.exe
2072	svchoster.exe
2072	svchoster.exe
2072	svchoster.exe
2072	svchoster.exe
2072	svchoster.exe
2072	svchoster.exe

Suspicious use of AdjustPrivilegeToken 50 IoCs

description	pid	Process
Token: SeDebugPrivilege	1692	2024-10-23_af70883f7ff9f9c19286ed07972bab84_wannacry.exe
Token: SeDebugPrivilege	2072	svchoster.exe
Token: SeBackupPrivilege	3532	vssvc.exe
Token: SeRestorePrivilege	3532	vssvc.exe
Token: SeAuditPrivilege	3532	vssvc.exe
Token: SeIncreaseQuotaPrivilege	2296	WMIC.exe
Token: SeSecurityPrivilege	2296	WMIC.exe
Token: SeTakeOwnershipPrivilege	2296	WMIC.exe
Token: SeLoadDriverPrivilege	2296	WMIC.exe
Token: SeSystemProfilePrivilege	2296	WMIC.exe
Token: SeSystemtimePrivilege	2296	WMIC.exe
Token: SeProfSingleProcessPrivilege	2296	WMIC.exe
Token: SeIncBasePriorityPrivilege	2296	WMIC.exe
Token: SeCreatePagefilePrivilege	2296	WMIC.exe
Token: SeBackupPrivilege	2296	WMIC.exe
Token: SeRestorePrivilege	2296	WMIC.exe
Token: SeShutdownPrivilege	2296	WMIC.exe
Token: SeDebugPrivilege	2296	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2296	WMIC.exe
Token: SeRemoteShutdownPrivilege	2296	WMIC.exe
Token: SeUndockPrivilege	2296	WMIC.exe
Token: SeManageVolumePrivilege	2296	WMIC.exe
Token: 33	2296	WMIC.exe
Token: 34	2296	WMIC.exe
Token: 35	2296	WMIC.exe
Token: 36	2296	WMIC.exe
Token: SeIncreaseQuotaPrivilege	2296	WMIC.exe
Token: SeSecurityPrivilege	2296	WMIC.exe
Token: SeTakeOwnershipPrivilege	2296	WMIC.exe
Token: SeLoadDriverPrivilege	2296	WMIC.exe
Token: SeSystemProfilePrivilege	2296	WMIC.exe
Token: SeSystemtimePrivilege	2296	WMIC.exe
Token: SeProfSingleProcessPrivilege	2296	WMIC.exe
Token: SeIncBasePriorityPrivilege	2296	WMIC.exe
Token: SeCreatePagefilePrivilege	2296	WMIC.exe
Token: SeBackupPrivilege	2296	WMIC.exe
Token: SeRestorePrivilege	2296	WMIC.exe
Token: SeShutdownPrivilege	2296	WMIC.exe
Token: SeDebugPrivilege	2296	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2296	WMIC.exe
Token: SeRemoteShutdownPrivilege	2296	WMIC.exe
Token: SeUndockPrivilege	2296	WMIC.exe
Token: SeManageVolumePrivilege	2296	WMIC.exe
Token: 33	2296	WMIC.exe
Token: 34	2296	WMIC.exe
Token: 35	2296	WMIC.exe
Token: 36	2296	WMIC.exe
Token: SeBackupPrivilege	4584	wbengine.exe
Token: SeRestorePrivilege	4584	wbengine.exe
Token: SeSecurityPrivilege	4584	wbengine.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1692 wrote to memory of 2072	1692	2024-10-23_af70883f7ff9f9c19286ed07972bab84_wannacry.exe	87
PID 1692 wrote to memory of 2072	1692	2024-10-23_af70883f7ff9f9c19286ed07972bab84_wannacry.exe	87
PID 2072 wrote to memory of 4556	2072	svchoster.exe	90
PID 2072 wrote to memory of 4556	2072	svchoster.exe	90
PID 4556 wrote to memory of 1616	4556	cmd.exe	92
PID 4556 wrote to memory of 1616	4556	cmd.exe	92
PID 4556 wrote to memory of 2296	4556	cmd.exe	95
PID 4556 wrote to memory of 2296	4556	cmd.exe	95
PID 2072 wrote to memory of 4824	2072	svchoster.exe	97
PID 2072 wrote to memory of 4824	2072	svchoster.exe	97
PID 4824 wrote to memory of 2136	4824	cmd.exe	99
PID 4824 wrote to memory of 2136	4824	cmd.exe	99
PID 4824 wrote to memory of 5108	4824	cmd.exe	100
PID 4824 wrote to memory of 5108	4824	cmd.exe	100
PID 2072 wrote to memory of 3836	2072	svchoster.exe	101
PID 2072 wrote to memory of 3836	2072	svchoster.exe	101
PID 3836 wrote to memory of 3520	3836	cmd.exe	103
PID 3836 wrote to memory of 3520	3836	cmd.exe	103
PID 2072 wrote to memory of 4328	2072	svchoster.exe	109
PID 2072 wrote to memory of 4328	2072	svchoster.exe	109

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\2024-10-23_af70883f7ff9f9c19286ed07972bab84_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-10-23_af70883f7ff9f9c19286ed07972bab84_wannacry.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1692
- C:\Users\Admin\AppData\Roaming\svchoster.exe
  "C:\Users\Admin\AppData\Roaming\svchoster.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:2072
- - 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:4556
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:1616
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:2296
- - 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:4824
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2136
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:5108
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3836
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:3520
- - 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:4328

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3532

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4584

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:1880

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
- Checks SCSI registry key(s)
PID:2236

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

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

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\svchoster.exe

Filesize
142KB

MD5
af70883f7ff9f9c19286ed07972bab84

SHA1
5d59cc33696cdc78f59448f2f6fb6cb08622b976

SHA256
be41b813b1af4634ec14cb822090bb16e300dc61f478c473ac3b18e6dc025150

SHA512
bfea6fa338ad9bb2be18a7fe1398d82f01258be0f57a3f2129a2b3e08342771faca874dcf0f257b54b14c49003789f139fe8fe9e5ca6b53d352670f6549438d1

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

Filesize
111B

MD5
016ab2aa899fdab8fe2dd4c4bb73548d

SHA1
2bf57b835d272a3b0b5f29fb145ac6bd509cd53c

SHA256
223706ee4377f157850bdffaa87c85ce49fb15bade70d08e19c3138106134748

SHA512
d46b73dd0ff072904b513dce54c164a30e0262b735d9254ffc7b596a2e691b2aa20ef57c82e95667ac5e051fbcc8be0bd82a49bdf0795058ab0a2b6ca3da3dab

Download Submit
memory/1692-0-0x00007FF9DB8B3000-0x00007FF9DB8B5000-memory.dmp

Filesize
8KB

Download
memory/1692-1-0x0000000000D70000-0x0000000000D9A000-memory.dmp

Filesize
168KB

Download
memory/2072-14-0x00007FF9DB8B0000-0x00007FF9DC371000-memory.dmp

Filesize
10.8MB

Download
memory/2072-74-0x00007FF9DB8B0000-0x00007FF9DC371000-memory.dmp

Filesize
10.8MB

Download
memory/2072-75-0x00007FF9DB8B0000-0x00007FF9DC371000-memory.dmp

Filesize
10.8MB

Download