chaos | 98e6fe0dfa72dfd322bfbddc7bdd6813f339fc3d88bccb2dbc2ed6cb487b90e4

Analysis

max time kernel
27s
max time network
30s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
03/02/2023, 07:42

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General

Target

2023-02-02_71c3a6f87a5c67593fd199a0fbc146bf_wannacry.exe
Size

517KB
MD5

71c3a6f87a5c67593fd199a0fbc146bf
SHA1

30dd047751e21b57f6c08a56b21580f44dd9f437
SHA256

98e6fe0dfa72dfd322bfbddc7bdd6813f339fc3d88bccb2dbc2ed6cb487b90e4
SHA512

21a5c616b8b9455409a76496bb91b131921018685d6de7f8b92712bcf7f1b8043049ae5591875c27d4ec04b52fd4be5931e70afb7b571b4b6302ec6cda2bf848
SSDEEP

12288:Xw9Rt0RPnRrcA0Sqg9bIFX7O5rBVOxZ3:0aVDbI5Or4

Score

10^/10

chaos evasion ransomware spyware stealer

Malware Config

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 4 IoCs

resource	yara_rule
behavioral1/memory/1264-54-0x0000000000D30000-0x0000000000DB8000-memory.dmp	family_chaos
behavioral1/files/0x000b00000001232f-56.dat	family_chaos
behavioral1/files/0x000b00000001232f-57.dat	family_chaos
behavioral1/memory/1452-58-0x0000000001170000-0x00000000011F8000-memory.dmp	family_chaos

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

File Deletion
T1107

Inhibit System Recovery
T1490

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
2024	bcdedit.exe
1052	bcdedit.exe

Deletes backup catalog 3 TTPs 1 IoCs

Uses wbadmin.exe to inhibit system recovery.

ransomware

Command-Line Interface

T1059

File Deletion

T1107

Inhibit System Recovery

T1490

pid	Process
1704	wbadmin.exe

Modifies extensions of user files 8 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File renamed	C:\Users\Admin\Pictures\GrantSkip.tif => C:\Users\Admin\Pictures\GrantSkip.tif.1kdb	svchost.exe
File renamed	C:\Users\Admin\Pictures\SuspendPublish.raw => C:\Users\Admin\Pictures\SuspendPublish.raw.a4m9	svchost.exe
File renamed	C:\Users\Admin\Pictures\UnprotectComplete.tif => C:\Users\Admin\Pictures\UnprotectComplete.tif.afb6	svchost.exe
File renamed	C:\Users\Admin\Pictures\WaitPublish.raw => C:\Users\Admin\Pictures\WaitPublish.raw.sozk	svchost.exe
File renamed	C:\Users\Admin\Pictures\WatchGet.png => C:\Users\Admin\Pictures\WatchGet.png.6l7n	svchost.exe
File renamed	C:\Users\Admin\Pictures\WriteRepair.tif => C:\Users\Admin\Pictures\WriteRepair.tif.hr7v	svchost.exe
File renamed	C:\Users\Admin\Pictures\CompareGet.raw => C:\Users\Admin\Pictures\CompareGet.raw.f0qs	svchost.exe
File renamed	C:\Users\Admin\Pictures\DisconnectRegister.tif => C:\Users\Admin\Pictures\DisconnectRegister.tif.xpvx	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
1452	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
T1081

Drops desktop.ini file(s) 33 IoCs

description	ioc	Process
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\Recent\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\Programs\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\Internet Explorer\Quick Launch\User Pinned\TaskBar\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\Public\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Searches\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\Links for United States\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\Videos\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\Start Menu\Programs\Accessories\System Tools\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\Sample Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\Sample Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Saved Games\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\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\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\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\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\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-1-5-21-3385717845-2518323428-350143044-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\tun25dw4k.jpg"	svchost.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Interacts with shadow copies 2 TTPs 1 IoCs

Shadow copies are often targeted by ransomware to inhibit system recovery.

ransomware

File Deletion

T1107

Inhibit System Recovery

T1490

pid	Process
576	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
1984	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1452	svchost.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1264	2023-02-02_71c3a6f87a5c67593fd199a0fbc146bf_wannacry.exe
1452	svchost.exe
1452	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	1264	2023-02-02_71c3a6f87a5c67593fd199a0fbc146bf_wannacry.exe
Token: SeDebugPrivilege	1452	svchost.exe
Token: SeBackupPrivilege	1176	vssvc.exe
Token: SeRestorePrivilege	1176	vssvc.exe
Token: SeAuditPrivilege	1176	vssvc.exe
Token: SeIncreaseQuotaPrivilege	240	WMIC.exe
Token: SeSecurityPrivilege	240	WMIC.exe
Token: SeTakeOwnershipPrivilege	240	WMIC.exe
Token: SeLoadDriverPrivilege	240	WMIC.exe
Token: SeSystemProfilePrivilege	240	WMIC.exe
Token: SeSystemtimePrivilege	240	WMIC.exe
Token: SeProfSingleProcessPrivilege	240	WMIC.exe
Token: SeIncBasePriorityPrivilege	240	WMIC.exe
Token: SeCreatePagefilePrivilege	240	WMIC.exe
Token: SeBackupPrivilege	240	WMIC.exe
Token: SeRestorePrivilege	240	WMIC.exe
Token: SeShutdownPrivilege	240	WMIC.exe
Token: SeDebugPrivilege	240	WMIC.exe
Token: SeSystemEnvironmentPrivilege	240	WMIC.exe
Token: SeRemoteShutdownPrivilege	240	WMIC.exe
Token: SeUndockPrivilege	240	WMIC.exe
Token: SeManageVolumePrivilege	240	WMIC.exe
Token: 33	240	WMIC.exe
Token: 34	240	WMIC.exe
Token: 35	240	WMIC.exe
Token: SeIncreaseQuotaPrivilege	240	WMIC.exe
Token: SeSecurityPrivilege	240	WMIC.exe
Token: SeTakeOwnershipPrivilege	240	WMIC.exe
Token: SeLoadDriverPrivilege	240	WMIC.exe
Token: SeSystemProfilePrivilege	240	WMIC.exe
Token: SeSystemtimePrivilege	240	WMIC.exe
Token: SeProfSingleProcessPrivilege	240	WMIC.exe
Token: SeIncBasePriorityPrivilege	240	WMIC.exe
Token: SeCreatePagefilePrivilege	240	WMIC.exe
Token: SeBackupPrivilege	240	WMIC.exe
Token: SeRestorePrivilege	240	WMIC.exe
Token: SeShutdownPrivilege	240	WMIC.exe
Token: SeDebugPrivilege	240	WMIC.exe
Token: SeSystemEnvironmentPrivilege	240	WMIC.exe
Token: SeRemoteShutdownPrivilege	240	WMIC.exe
Token: SeUndockPrivilege	240	WMIC.exe
Token: SeManageVolumePrivilege	240	WMIC.exe
Token: 33	240	WMIC.exe
Token: 34	240	WMIC.exe
Token: 35	240	WMIC.exe
Token: SeBackupPrivilege	1496	wbengine.exe
Token: SeRestorePrivilege	1496	wbengine.exe
Token: SeSecurityPrivilege	1496	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1264 wrote to memory of 1452	1264	2023-02-02_71c3a6f87a5c67593fd199a0fbc146bf_wannacry.exe	28
PID 1264 wrote to memory of 1452	1264	2023-02-02_71c3a6f87a5c67593fd199a0fbc146bf_wannacry.exe	28
PID 1264 wrote to memory of 1452	1264	2023-02-02_71c3a6f87a5c67593fd199a0fbc146bf_wannacry.exe	28
PID 1452 wrote to memory of 856	1452	svchost.exe	30
PID 1452 wrote to memory of 856	1452	svchost.exe	30
PID 1452 wrote to memory of 856	1452	svchost.exe	30
PID 856 wrote to memory of 576	856	cmd.exe	32
PID 856 wrote to memory of 576	856	cmd.exe	32
PID 856 wrote to memory of 576	856	cmd.exe	32
PID 856 wrote to memory of 240	856	cmd.exe	36
PID 856 wrote to memory of 240	856	cmd.exe	36
PID 856 wrote to memory of 240	856	cmd.exe	36
PID 1452 wrote to memory of 892	1452	svchost.exe	38
PID 1452 wrote to memory of 892	1452	svchost.exe	38
PID 1452 wrote to memory of 892	1452	svchost.exe	38
PID 892 wrote to memory of 2024	892	cmd.exe	40
PID 892 wrote to memory of 2024	892	cmd.exe	40
PID 892 wrote to memory of 2024	892	cmd.exe	40
PID 892 wrote to memory of 1052	892	cmd.exe	41
PID 892 wrote to memory of 1052	892	cmd.exe	41
PID 892 wrote to memory of 1052	892	cmd.exe	41
PID 1452 wrote to memory of 1608	1452	svchost.exe	42
PID 1452 wrote to memory of 1608	1452	svchost.exe	42
PID 1452 wrote to memory of 1608	1452	svchost.exe	42
PID 1608 wrote to memory of 1704	1608	cmd.exe	44
PID 1608 wrote to memory of 1704	1608	cmd.exe	44
PID 1608 wrote to memory of 1704	1608	cmd.exe	44
PID 1452 wrote to memory of 1984	1452	svchost.exe	48
PID 1452 wrote to memory of 1984	1452	svchost.exe	48
PID 1452 wrote to memory of 1984	1452	svchost.exe	48

C:\Users\Admin\AppData\Local\Temp\2023-02-02_71c3a6f87a5c67593fd199a0fbc146bf_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2023-02-02_71c3a6f87a5c67593fd199a0fbc146bf_wannacry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1264
- C:\Users\Admin\AppData\Roaming\svchost.exe
  "C:\Users\Admin\AppData\Roaming\svchost.exe"
  2⤵
  - Modifies extensions of user files
  - Drops startup file
  - Executes dropped EXE
  - Drops desktop.ini file(s)
  - Sets desktop wallpaper using registry
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1452
- - 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:856
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:576
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:240
- - 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:892
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2024
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1052
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1608
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:1704
- - 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:1984

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1176

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1496

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:1148

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:1044

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Command-Line Interface

T1059

Persistence

Privilege Escalation

Defense Evasion

File Deletion

T1107

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

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\read_it.txt

Filesize
970B

MD5
ffd0ab6d5a16a4ecbca04be23a8f5802

SHA1
6bb7d382fd273296a0428f4a8e83153548b6e675

SHA256
326678574d8eba54ebe47a2c3e9c27e6c93e4e1557f0ef6d6b2ce4eea5d3a24d

SHA512
ac78a771132af3a6ab15205c90a869a9f64924782505d58b9fa0d65219216215b02f29cdaa838fc6ee31e4a5feb5f51664c22b427052d0900e6e8e3c38b0b652

Download Submit
C:\Users\Admin\AppData\Roaming\svchost.exe

Filesize
517KB

MD5
71c3a6f87a5c67593fd199a0fbc146bf

SHA1
30dd047751e21b57f6c08a56b21580f44dd9f437

SHA256
98e6fe0dfa72dfd322bfbddc7bdd6813f339fc3d88bccb2dbc2ed6cb487b90e4

SHA512
21a5c616b8b9455409a76496bb91b131921018685d6de7f8b92712bcf7f1b8043049ae5591875c27d4ec04b52fd4be5931e70afb7b571b4b6302ec6cda2bf848

Download Submit
C:\Users\Admin\AppData\Roaming\svchost.exe

Filesize
517KB

MD5
71c3a6f87a5c67593fd199a0fbc146bf

SHA1
30dd047751e21b57f6c08a56b21580f44dd9f437

SHA256
98e6fe0dfa72dfd322bfbddc7bdd6813f339fc3d88bccb2dbc2ed6cb487b90e4

SHA512
21a5c616b8b9455409a76496bb91b131921018685d6de7f8b92712bcf7f1b8043049ae5591875c27d4ec04b52fd4be5931e70afb7b571b4b6302ec6cda2bf848

Download Submit
memory/1264-54-0x0000000000D30000-0x0000000000DB8000-memory.dmp

Filesize
544KB

Download
memory/1452-58-0x0000000001170000-0x00000000011F8000-memory.dmp

Filesize
544KB

Download
memory/1704-67-0x000007FEFB8E1000-0x000007FEFB8E3000-memory.dmp

Filesize
8KB

Download