chaos | 2dec9e4e6c2b23869ee65cacc7f0011dc3592c5c2ba2da8358063741671a4ad6

Analysis

max time kernel
93s
max time network
127s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
06/04/2024, 15:35

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General

Target

2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
Size

280KB
MD5

4c5cb08f2367e302ecb42531c36776a0
SHA1

4f1d06dd3cb123214aa25aba3fd3d142cdc1e8dc
SHA256

2dec9e4e6c2b23869ee65cacc7f0011dc3592c5c2ba2da8358063741671a4ad6
SHA512

a79f4808e48872b65262aa3a57f1239eb0698c86f3f48f619d6cb6349d85c6e4007228e67eccc4e4158c83cc4fa4498066d26bf95fa9934c8ad2224ac10c0be4
SSDEEP

6144:qr9L8jq2Gteiy0KhK6bClLmlJNZtHim/WnA/77FfA4RL4xLZTogzI:jPGteiy0cKeeLmlJNZtCmGM7FfxLctTr

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/4068-0-0x0000000000380000-0x00000000003CC000-memory.dmp	family_chaos
behavioral2/files/0x000300000002288a-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/4068-0-0x0000000000380000-0x00000000003CC000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral2/files/0x000300000002288a-6.dat	INDICATOR_SUSPICIOUS_GENRansomware

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
3412	bcdedit.exe
1056	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
4284	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-1-5-21-399997616-3400990511-967324271-1000\Control Panel\International\Geo\Nation	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
Key value queried	\REGISTRY\USER\S-1-5-21-399997616-3400990511-967324271-1000\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\read_it.txt	svchost.exe
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

Executes dropped EXE 1 IoCs

pid	Process
116	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\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\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\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\System Tools\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\AppData\Roaming\Microsoft\Windows\AccountPictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Contacts\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\Music\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\Libraries\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\Public\Videos\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\Pictures\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\Programs\Accessories\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-399997616-3400990511-967324271-1000\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\Maintenance\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\Windows\Start Menu\Programs\Accessibility\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\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\SendTo\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\Administrative Tools\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\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-1-5-21-399997616-3400990511-967324271-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\djc31ds9v.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
5028	vssadmin.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-399997616-3400990511-967324271-1000_Classes\Local Settings	svchost.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
2536	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
116	svchost.exe

Suspicious behavior: EnumeratesProcesses 54 IoCs

pid	Process
4068	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
4068	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
4068	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
4068	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
4068	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
4068	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
4068	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
4068	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
4068	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
4068	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
4068	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
4068	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
4068	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
4068	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
4068	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
4068	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
4068	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
4068	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
4068	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
4068	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
4068	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
4068	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
4068	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
4068	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
4068	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
4068	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
4068	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
4068	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
116	svchost.exe
116	svchost.exe
116	svchost.exe
116	svchost.exe
116	svchost.exe
116	svchost.exe
116	svchost.exe
116	svchost.exe
116	svchost.exe
116	svchost.exe
116	svchost.exe
116	svchost.exe
116	svchost.exe
116	svchost.exe
116	svchost.exe
116	svchost.exe
116	svchost.exe
116	svchost.exe
116	svchost.exe
116	svchost.exe
116	svchost.exe
116	svchost.exe
116	svchost.exe
116	svchost.exe
116	svchost.exe
116	svchost.exe

Suspicious use of AdjustPrivilegeToken 50 IoCs

description	pid	Process
Token: SeDebugPrivilege	4068	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
Token: SeDebugPrivilege	116	svchost.exe
Token: SeBackupPrivilege	4544	vssvc.exe
Token: SeRestorePrivilege	4544	vssvc.exe
Token: SeAuditPrivilege	4544	vssvc.exe
Token: SeIncreaseQuotaPrivilege	4896	WMIC.exe
Token: SeSecurityPrivilege	4896	WMIC.exe
Token: SeTakeOwnershipPrivilege	4896	WMIC.exe
Token: SeLoadDriverPrivilege	4896	WMIC.exe
Token: SeSystemProfilePrivilege	4896	WMIC.exe
Token: SeSystemtimePrivilege	4896	WMIC.exe
Token: SeProfSingleProcessPrivilege	4896	WMIC.exe
Token: SeIncBasePriorityPrivilege	4896	WMIC.exe
Token: SeCreatePagefilePrivilege	4896	WMIC.exe
Token: SeBackupPrivilege	4896	WMIC.exe
Token: SeRestorePrivilege	4896	WMIC.exe
Token: SeShutdownPrivilege	4896	WMIC.exe
Token: SeDebugPrivilege	4896	WMIC.exe
Token: SeSystemEnvironmentPrivilege	4896	WMIC.exe
Token: SeRemoteShutdownPrivilege	4896	WMIC.exe
Token: SeUndockPrivilege	4896	WMIC.exe
Token: SeManageVolumePrivilege	4896	WMIC.exe
Token: 33	4896	WMIC.exe
Token: 34	4896	WMIC.exe
Token: 35	4896	WMIC.exe
Token: 36	4896	WMIC.exe
Token: SeIncreaseQuotaPrivilege	4896	WMIC.exe
Token: SeSecurityPrivilege	4896	WMIC.exe
Token: SeTakeOwnershipPrivilege	4896	WMIC.exe
Token: SeLoadDriverPrivilege	4896	WMIC.exe
Token: SeSystemProfilePrivilege	4896	WMIC.exe
Token: SeSystemtimePrivilege	4896	WMIC.exe
Token: SeProfSingleProcessPrivilege	4896	WMIC.exe
Token: SeIncBasePriorityPrivilege	4896	WMIC.exe
Token: SeCreatePagefilePrivilege	4896	WMIC.exe
Token: SeBackupPrivilege	4896	WMIC.exe
Token: SeRestorePrivilege	4896	WMIC.exe
Token: SeShutdownPrivilege	4896	WMIC.exe
Token: SeDebugPrivilege	4896	WMIC.exe
Token: SeSystemEnvironmentPrivilege	4896	WMIC.exe
Token: SeRemoteShutdownPrivilege	4896	WMIC.exe
Token: SeUndockPrivilege	4896	WMIC.exe
Token: SeManageVolumePrivilege	4896	WMIC.exe
Token: 33	4896	WMIC.exe
Token: 34	4896	WMIC.exe
Token: 35	4896	WMIC.exe
Token: 36	4896	WMIC.exe
Token: SeBackupPrivilege	4336	wbengine.exe
Token: SeRestorePrivilege	4336	wbengine.exe
Token: SeSecurityPrivilege	4336	wbengine.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 4068 wrote to memory of 116	4068	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe	89
PID 4068 wrote to memory of 116	4068	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe	89
PID 116 wrote to memory of 3480	116	svchost.exe	96
PID 116 wrote to memory of 3480	116	svchost.exe	96
PID 3480 wrote to memory of 5028	3480	cmd.exe	98
PID 3480 wrote to memory of 5028	3480	cmd.exe	98
PID 3480 wrote to memory of 4896	3480	cmd.exe	101
PID 3480 wrote to memory of 4896	3480	cmd.exe	101
PID 116 wrote to memory of 4488	116	svchost.exe	102
PID 116 wrote to memory of 4488	116	svchost.exe	102
PID 4488 wrote to memory of 3412	4488	cmd.exe	104
PID 4488 wrote to memory of 3412	4488	cmd.exe	104
PID 4488 wrote to memory of 1056	4488	cmd.exe	105
PID 4488 wrote to memory of 1056	4488	cmd.exe	105
PID 116 wrote to memory of 4168	116	svchost.exe	106
PID 116 wrote to memory of 4168	116	svchost.exe	106
PID 4168 wrote to memory of 4284	4168	cmd.exe	108
PID 4168 wrote to memory of 4284	4168	cmd.exe	108
PID 116 wrote to memory of 2536	116	svchost.exe	112
PID 116 wrote to memory of 2536	116	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\2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4068
- 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:116
- - 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:3480
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:5028
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:4896
- - 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:4488
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:3412
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1056
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4168
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:4284
- - 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:2536

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4544

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4336

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:1656

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
- Checks SCSI registry key(s)
PID:2968

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
280KB

MD5
4c5cb08f2367e302ecb42531c36776a0

SHA1
4f1d06dd3cb123214aa25aba3fd3d142cdc1e8dc

SHA256
2dec9e4e6c2b23869ee65cacc7f0011dc3592c5c2ba2da8358063741671a4ad6

SHA512
a79f4808e48872b65262aa3a57f1239eb0698c86f3f48f619d6cb6349d85c6e4007228e67eccc4e4158c83cc4fa4498066d26bf95fa9934c8ad2224ac10c0be4

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

Filesize
984B

MD5
a9025b6c8b3bd35e386bb0f8b97c6f2f

SHA1
322cfbb0af7316d54ba22d2db71ad7e9cede073e

SHA256
c88315ca4262a30f70a14fc49729c31e78c5cd40c6a34660964b0c121d064954

SHA512
48072e27249be0b3ec835de962c2b1a842748d1541c06a439a1f3fe61afed4e45051c641bb2e4975b71664e79be61e9982dcb0d6e2000b3ab413c445e5850d40

Download Submit
memory/116-15-0x00007FF9804F0000-0x00007FF980FB1000-memory.dmp

Filesize
10.8MB

Download
memory/116-426-0x00007FF9804F0000-0x00007FF980FB1000-memory.dmp

Filesize
10.8MB

Download
memory/4068-0-0x0000000000380000-0x00000000003CC000-memory.dmp

Filesize
304KB

Download
memory/4068-1-0x00007FF9804F0000-0x00007FF980FB1000-memory.dmp

Filesize
10.8MB

Download
memory/4068-14-0x00007FF9804F0000-0x00007FF980FB1000-memory.dmp

Filesize
10.8MB

Download