chaos | d047a3d556af2717969da799b991f255b7a282b4a0c7d4df30adf34a4cadc37a

Analysis

max time kernel
142s
max time network
111s
platform
windows10-2004_x64
resource
win10v2004-20240910-en
resource tags

arch:x64arch:x86image:win10v2004-20240910-enlocale:en-usos:windows10-2004-x64system
submitted
02/10/2024, 10:17

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General

Target
2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe
Size 232KB
Sample241002-mbjassvcpg
SHA256 d047a3d556af2717969da799b991f255b7a282b4a0c7d4df30adf34a4cadc37a
MD5 52285212e0d83a23f0bc321e9553ddf2
SHA1 d7b61c3c7e5b7f148029b1ce75e2eb4f01125e44
SHA512 d171a821e9fe042a36d07fee47ffb575d88c0a4d44baee39c59d6e18371275598b4b5fb2195899878e9dc8975355e687b47d82f2237c1d2b14b781ad67adf86b
SSDEEP 3072:PoxUHr9UA6iSob4L1bbc+fG1Q0WE1T0QgsC759L0TQQun43Nf:fr9UA6iS7LRVGqIT0XR75903Nf
MD5 SHA1 SHA512 SSDEEP

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/3052-1-0x0000000000BB0000-0x0000000000BF0000-memory.dmp	family_chaos
behavioral2/files/0x0004000000022aaa-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
1668	bcdedit.exe
3596	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
4780	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-1-5-21-2629364133-3182087385-364449604-1000\Control Panel\International\Geo\Nation	2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2629364133-3182087385-364449604-1000\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
1040	svchost.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\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\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\Pictures\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\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\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\Administrative Tools\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\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\Internet Explorer\Quick Launch\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\Pictures\Saved Pictures\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\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\Contacts\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Music\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\AccountPictures\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\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\Maintenance\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\Favorites\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Searches\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-2629364133-3182087385-364449604-1000\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\Pictures\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-1-5-21-2629364133-3182087385-364449604-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\tpi8ua4cs.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_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
820	vssadmin.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2629364133-3182087385-364449604-1000_Classes\Local Settings	svchost.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
2276	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1040	svchost.exe

Suspicious behavior: EnumeratesProcesses 47 IoCs

pid	Process
3052	2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe
3052	2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe
3052	2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe
3052	2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe
3052	2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe
3052	2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe
3052	2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe
3052	2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe
3052	2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe
3052	2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe
3052	2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe
3052	2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe
3052	2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe
3052	2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe
3052	2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe
3052	2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe
3052	2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe
3052	2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe
3052	2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe
3052	2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe
3052	2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe
3052	2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe
3052	2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe
1040	svchost.exe
1040	svchost.exe
1040	svchost.exe
1040	svchost.exe
1040	svchost.exe
1040	svchost.exe
1040	svchost.exe
1040	svchost.exe
1040	svchost.exe
1040	svchost.exe
1040	svchost.exe
1040	svchost.exe
1040	svchost.exe
1040	svchost.exe
1040	svchost.exe
1040	svchost.exe
1040	svchost.exe
1040	svchost.exe
1040	svchost.exe
1040	svchost.exe
1040	svchost.exe
1040	svchost.exe
1040	svchost.exe
1040	svchost.exe

Suspicious use of AdjustPrivilegeToken 50 IoCs

description	pid	Process
Token: SeDebugPrivilege	3052	2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe
Token: SeDebugPrivilege	1040	svchost.exe
Token: SeBackupPrivilege	3508	vssvc.exe
Token: SeRestorePrivilege	3508	vssvc.exe
Token: SeAuditPrivilege	3508	vssvc.exe
Token: SeIncreaseQuotaPrivilege	3840	WMIC.exe
Token: SeSecurityPrivilege	3840	WMIC.exe
Token: SeTakeOwnershipPrivilege	3840	WMIC.exe
Token: SeLoadDriverPrivilege	3840	WMIC.exe
Token: SeSystemProfilePrivilege	3840	WMIC.exe
Token: SeSystemtimePrivilege	3840	WMIC.exe
Token: SeProfSingleProcessPrivilege	3840	WMIC.exe
Token: SeIncBasePriorityPrivilege	3840	WMIC.exe
Token: SeCreatePagefilePrivilege	3840	WMIC.exe
Token: SeBackupPrivilege	3840	WMIC.exe
Token: SeRestorePrivilege	3840	WMIC.exe
Token: SeShutdownPrivilege	3840	WMIC.exe
Token: SeDebugPrivilege	3840	WMIC.exe
Token: SeSystemEnvironmentPrivilege	3840	WMIC.exe
Token: SeRemoteShutdownPrivilege	3840	WMIC.exe
Token: SeUndockPrivilege	3840	WMIC.exe
Token: SeManageVolumePrivilege	3840	WMIC.exe
Token: 33	3840	WMIC.exe
Token: 34	3840	WMIC.exe
Token: 35	3840	WMIC.exe
Token: 36	3840	WMIC.exe
Token: SeIncreaseQuotaPrivilege	3840	WMIC.exe
Token: SeSecurityPrivilege	3840	WMIC.exe
Token: SeTakeOwnershipPrivilege	3840	WMIC.exe
Token: SeLoadDriverPrivilege	3840	WMIC.exe
Token: SeSystemProfilePrivilege	3840	WMIC.exe
Token: SeSystemtimePrivilege	3840	WMIC.exe
Token: SeProfSingleProcessPrivilege	3840	WMIC.exe
Token: SeIncBasePriorityPrivilege	3840	WMIC.exe
Token: SeCreatePagefilePrivilege	3840	WMIC.exe
Token: SeBackupPrivilege	3840	WMIC.exe
Token: SeRestorePrivilege	3840	WMIC.exe
Token: SeShutdownPrivilege	3840	WMIC.exe
Token: SeDebugPrivilege	3840	WMIC.exe
Token: SeSystemEnvironmentPrivilege	3840	WMIC.exe
Token: SeRemoteShutdownPrivilege	3840	WMIC.exe
Token: SeUndockPrivilege	3840	WMIC.exe
Token: SeManageVolumePrivilege	3840	WMIC.exe
Token: 33	3840	WMIC.exe
Token: 34	3840	WMIC.exe
Token: 35	3840	WMIC.exe
Token: 36	3840	WMIC.exe
Token: SeBackupPrivilege	2168	wbengine.exe
Token: SeRestorePrivilege	2168	wbengine.exe
Token: SeSecurityPrivilege	2168	wbengine.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 3052 wrote to memory of 1040	3052	2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe	91
PID 3052 wrote to memory of 1040	3052	2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe	91
PID 1040 wrote to memory of 1752	1040	svchost.exe	96
PID 1040 wrote to memory of 1752	1040	svchost.exe	96
PID 1752 wrote to memory of 820	1752	cmd.exe	98
PID 1752 wrote to memory of 820	1752	cmd.exe	98
PID 1752 wrote to memory of 3840	1752	cmd.exe	101
PID 1752 wrote to memory of 3840	1752	cmd.exe	101
PID 1040 wrote to memory of 2920	1040	svchost.exe	102
PID 1040 wrote to memory of 2920	1040	svchost.exe	102
PID 2920 wrote to memory of 1668	2920	cmd.exe	104
PID 2920 wrote to memory of 1668	2920	cmd.exe	104
PID 2920 wrote to memory of 3596	2920	cmd.exe	105
PID 2920 wrote to memory of 3596	2920	cmd.exe	105
PID 1040 wrote to memory of 3904	1040	svchost.exe	106
PID 1040 wrote to memory of 3904	1040	svchost.exe	106
PID 3904 wrote to memory of 4780	3904	cmd.exe	108
PID 3904 wrote to memory of 4780	3904	cmd.exe	108
PID 1040 wrote to memory of 2276	1040	svchost.exe	112
PID 1040 wrote to memory of 2276	1040	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\2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3052
- 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:1040
- - 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:1752
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:820
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:3840
- - 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:2920
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1668
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:3596
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3904
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:4780
- - 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:2276

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3508

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2168

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:3584

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
- Checks SCSI registry key(s)
PID:3816

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

svchost.exe

Path C:\Users\Admin\AppData\Roaming\svchost.exe
Size 232KB
SHA256 d047a3d556af2717969da799b991f255b7a282b4a0c7d4df30adf34a4cadc37a
MD5 52285212e0d83a23f0bc321e9553ddf2
SHA1 d7b61c3c7e5b7f148029b1ce75e2eb4f01125e44
SHA512 d171a821e9fe042a36d07fee47ffb575d88c0a4d44baee39c59d6e18371275598b4b5fb2195899878e9dc8975355e687b47d82f2237c1d2b14b781ad67adf86b
SSDEEP 3072:PoxUHr9UA6iSob4L1bbc+fG1Q0WE1T0QgsC759L0TQQun43Nf:fr9UA6iS7LRVGqIT0XR75903Nf
MD5 SHA1 SHA512 SSDEEP

Submit Download

read_it.txt

Path C:\Users\Admin\Documents\read_it.txt
Size 60B
SHA256 87e8f9aff80e5f5d886118a79cd793af9b7875206dc2f99e1f6811037fe258e6
MD5 4d40f632748d11307b30b0599dbc156f
SHA1 8111b6566282c3f409e45542702fbd5725037a01
SHA512 46d53bc149807fd8a63f1a2fd6e8377f2079bbafe9fb244e635d9902975b77b07871354b6fb19f2187c0549cfcd0f030b053612b8231ebf4a65bd86bae747f37
MD5 SHA1 SHA512

Submit Download

memory/1040-14-0x00007FFDB9230000-0x00007FFDB9CF1000-memory.dmp

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memory/1040-459-0x00007FFDB9230000-0x00007FFDB9CF1000-memory.dmp

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memory/3052-0-0x00007FFDB9233000-0x00007FFDB9235000-memory.dmp

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memory/3052-1-0x0000000000BB0000-0x0000000000BF0000-memory.dmp

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