chaos | 9dab6749bdeef4e92502efed4e21f46f8590b7534d01b93576a63f4ac1e77851

Analysis

max time kernel
149s
max time network
29s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
17/03/2023, 04:24

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General

Target
2023-03-16_88a65f4208e3527decd4128072084dd8_wannacry.exe
Size 238KB
Sample230317-e1c63sgc51
SHA256 9dab6749bdeef4e92502efed4e21f46f8590b7534d01b93576a63f4ac1e77851
MD5 88a65f4208e3527decd4128072084dd8
SHA1 aff3a50149617b1d84544e58a7f08baf06ac6473
SHA512 2797455fd14b5b36cf6947f3912f0a1daca097b7e64eb8f4be42a30d67db9a7fec4dc68f966f65ac3289be50872fd88a48b5f092c1f2774bf820eada50437018
SSDEEP 3072:moKYar96VL9z3+wdSe1WcBRjpW5VFMNBDf5qIS/QWqGiUEJhREVUAISsdWBYf7Dx:qr9GLhxhdsVFGEeRJk8nrKfQ+
MD5 SHA1 SHA512 SSDEEP

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/1336-54-0x00000000000D0000-0x0000000000112000-memory.dmp	family_chaos
behavioral1/files/0x002000000000f683-58.dat	family_chaos
behavioral1/files/0x002000000000f683-59.dat	family_chaos
behavioral1/memory/1436-60-0x00000000008C0000-0x0000000000902000-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
768	bcdedit.exe
1552	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
1012	wbadmin.exe

Modifies extensions of user files 4 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File renamed	C:\Users\Admin\Pictures\SyncRead.raw => C:\Users\Admin\Pictures\SyncRead.raw.TuRkEy	svchost.exe
File renamed	C:\Users\Admin\Pictures\ExpandUnpublish.tif => C:\Users\Admin\Pictures\ExpandUnpublish.tif.TuRkEy	svchost.exe
File renamed	C:\Users\Admin\Pictures\NewConnect.png => C:\Users\Admin\Pictures\NewConnect.png.TuRkEy	svchost.exe
File renamed	C:\Users\Admin\Pictures\RequestCopy.png => C:\Users\Admin\Pictures\RequestCopy.png.TuRkEy	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\Instruction	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1436	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\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\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\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\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\Accessibility\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Music\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\Start Menu\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\Start Menu\Programs\Accessories\System Tools\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\Videos\Sample Videos\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\Programs\Accessories\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Documents\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\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\Sample Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\Links\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\Searches\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\Admin\Contacts\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\Sample Music\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-1-5-21-1914912747-3343861975-731272777-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\b0rzp2654.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
1808	vssadmin.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000_Classes\Local Settings	rundll32.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1436	svchost.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1336	2023-03-16_88a65f4208e3527decd4128072084dd8_wannacry.exe
1436	svchost.exe
1436	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	1336	2023-03-16_88a65f4208e3527decd4128072084dd8_wannacry.exe
Token: SeDebugPrivilege	1436	svchost.exe
Token: SeBackupPrivilege	1188	vssvc.exe
Token: SeRestorePrivilege	1188	vssvc.exe
Token: SeAuditPrivilege	1188	vssvc.exe
Token: SeIncreaseQuotaPrivilege	1428	WMIC.exe
Token: SeSecurityPrivilege	1428	WMIC.exe
Token: SeTakeOwnershipPrivilege	1428	WMIC.exe
Token: SeLoadDriverPrivilege	1428	WMIC.exe
Token: SeSystemProfilePrivilege	1428	WMIC.exe
Token: SeSystemtimePrivilege	1428	WMIC.exe
Token: SeProfSingleProcessPrivilege	1428	WMIC.exe
Token: SeIncBasePriorityPrivilege	1428	WMIC.exe
Token: SeCreatePagefilePrivilege	1428	WMIC.exe
Token: SeBackupPrivilege	1428	WMIC.exe
Token: SeRestorePrivilege	1428	WMIC.exe
Token: SeShutdownPrivilege	1428	WMIC.exe
Token: SeDebugPrivilege	1428	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1428	WMIC.exe
Token: SeRemoteShutdownPrivilege	1428	WMIC.exe
Token: SeUndockPrivilege	1428	WMIC.exe
Token: SeManageVolumePrivilege	1428	WMIC.exe
Token: 33	1428	WMIC.exe
Token: 34	1428	WMIC.exe
Token: 35	1428	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1428	WMIC.exe
Token: SeSecurityPrivilege	1428	WMIC.exe
Token: SeTakeOwnershipPrivilege	1428	WMIC.exe
Token: SeLoadDriverPrivilege	1428	WMIC.exe
Token: SeSystemProfilePrivilege	1428	WMIC.exe
Token: SeSystemtimePrivilege	1428	WMIC.exe
Token: SeProfSingleProcessPrivilege	1428	WMIC.exe
Token: SeIncBasePriorityPrivilege	1428	WMIC.exe
Token: SeCreatePagefilePrivilege	1428	WMIC.exe
Token: SeBackupPrivilege	1428	WMIC.exe
Token: SeRestorePrivilege	1428	WMIC.exe
Token: SeShutdownPrivilege	1428	WMIC.exe
Token: SeDebugPrivilege	1428	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1428	WMIC.exe
Token: SeRemoteShutdownPrivilege	1428	WMIC.exe
Token: SeUndockPrivilege	1428	WMIC.exe
Token: SeManageVolumePrivilege	1428	WMIC.exe
Token: 33	1428	WMIC.exe
Token: 34	1428	WMIC.exe
Token: 35	1428	WMIC.exe
Token: SeBackupPrivilege	1800	wbengine.exe
Token: SeRestorePrivilege	1800	wbengine.exe
Token: SeSecurityPrivilege	1800	wbengine.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
268	AcroRd32.exe
268	AcroRd32.exe

Suspicious use of WriteProcessMemory 34 IoCs

description	pid	Process	procid_target
PID 1336 wrote to memory of 1436	1336	2023-03-16_88a65f4208e3527decd4128072084dd8_wannacry.exe	27
PID 1336 wrote to memory of 1436	1336	2023-03-16_88a65f4208e3527decd4128072084dd8_wannacry.exe	27
PID 1336 wrote to memory of 1436	1336	2023-03-16_88a65f4208e3527decd4128072084dd8_wannacry.exe	27
PID 1436 wrote to memory of 1700	1436	svchost.exe	29
PID 1436 wrote to memory of 1700	1436	svchost.exe	29
PID 1436 wrote to memory of 1700	1436	svchost.exe	29
PID 1700 wrote to memory of 1808	1700	cmd.exe	31
PID 1700 wrote to memory of 1808	1700	cmd.exe	31
PID 1700 wrote to memory of 1808	1700	cmd.exe	31
PID 1700 wrote to memory of 1428	1700	cmd.exe	35
PID 1700 wrote to memory of 1428	1700	cmd.exe	35
PID 1700 wrote to memory of 1428	1700	cmd.exe	35
PID 1436 wrote to memory of 1764	1436	svchost.exe	37
PID 1436 wrote to memory of 1764	1436	svchost.exe	37
PID 1436 wrote to memory of 1764	1436	svchost.exe	37
PID 1764 wrote to memory of 768	1764	cmd.exe	39
PID 1764 wrote to memory of 768	1764	cmd.exe	39
PID 1764 wrote to memory of 768	1764	cmd.exe	39
PID 1764 wrote to memory of 1552	1764	cmd.exe	40
PID 1764 wrote to memory of 1552	1764	cmd.exe	40
PID 1764 wrote to memory of 1552	1764	cmd.exe	40
PID 1436 wrote to memory of 1640	1436	svchost.exe	41
PID 1436 wrote to memory of 1640	1436	svchost.exe	41
PID 1436 wrote to memory of 1640	1436	svchost.exe	41
PID 1640 wrote to memory of 1012	1640	cmd.exe	43
PID 1640 wrote to memory of 1012	1640	cmd.exe	43
PID 1640 wrote to memory of 1012	1640	cmd.exe	43
PID 1436 wrote to memory of 1352	1436	svchost.exe	47
PID 1436 wrote to memory of 1352	1436	svchost.exe	47
PID 1436 wrote to memory of 1352	1436	svchost.exe	47
PID 1352 wrote to memory of 268	1352	rundll32.exe	49
PID 1352 wrote to memory of 268	1352	rundll32.exe	49
PID 1352 wrote to memory of 268	1352	rundll32.exe	49
PID 1352 wrote to memory of 268	1352	rundll32.exe	49

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\2023-03-16_88a65f4208e3527decd4128072084dd8_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2023-03-16_88a65f4208e3527decd4128072084dd8_wannacry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1336
- 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:1436
- - 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:1700
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:1808
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:1428
- - 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:1764
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:768
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1552
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1640
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:1012
- - C:\Windows\system32\rundll32.exe
    "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Roaming\Instruction
    3⤵
    - Modifies registry class
    - Suspicious use of WriteProcessMemory
    PID:1352
  - - C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe
      "C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe" "C:\Users\Admin\AppData\Roaming\Instruction"
      4⤵
      Suspicious use of SetWindowsHookEx
      PID:268

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1188

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1800

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:1652

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:1032

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

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

Instruction

Path C:\Users\Admin\AppData\Roaming\Instruction
Size 958B
SHA256 b3d82956d486a27a7ba5c5cec61bbd4f6ce909acb5d47b38ecc825764f663d60
MD5 3b232416bb78909333b345591a62f654
SHA1 dd625318b84a30b59e7d8c9b87ee41747e226414
SHA512 6a4f6620278432327ed38bc737122f6a5d701e49a1d7bdcb8679537b1b697fb1c5ee1a7ff59d3aeaf98aaa7a41545dc3de8b1434cc3af9d7817d2cfc7212f30d
MD5 SHA1 SHA512

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svchost.exe

Path C:\Users\Admin\AppData\Roaming\svchost.exe
Size 238KB
SHA256 9dab6749bdeef4e92502efed4e21f46f8590b7534d01b93576a63f4ac1e77851
MD5 88a65f4208e3527decd4128072084dd8
SHA1 aff3a50149617b1d84544e58a7f08baf06ac6473
SHA512 2797455fd14b5b36cf6947f3912f0a1daca097b7e64eb8f4be42a30d67db9a7fec4dc68f966f65ac3289be50872fd88a48b5f092c1f2774bf820eada50437018
SSDEEP 3072:moKYar96VL9z3+wdSe1WcBRjpW5VFMNBDf5qIS/QWqGiUEJhREVUAISsdWBYf7Dx:qr9GLhxhdsVFGEeRJk8nrKfQ+
MD5 SHA1 SHA512 SSDEEP

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svchost.exe

Path C:\Users\Admin\AppData\Roaming\svchost.exe
Size 238KB
SHA256 9dab6749bdeef4e92502efed4e21f46f8590b7534d01b93576a63f4ac1e77851
MD5 88a65f4208e3527decd4128072084dd8
SHA1 aff3a50149617b1d84544e58a7f08baf06ac6473
SHA512 2797455fd14b5b36cf6947f3912f0a1daca097b7e64eb8f4be42a30d67db9a7fec4dc68f966f65ac3289be50872fd88a48b5f092c1f2774bf820eada50437018
SSDEEP 3072:moKYar96VL9z3+wdSe1WcBRjpW5VFMNBDf5qIS/QWqGiUEJhREVUAISsdWBYf7Dx:qr9GLhxhdsVFGEeRJk8nrKfQ+
MD5 SHA1 SHA512 SSDEEP

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Instruction

Path C:\Users\Admin\Downloads\Instruction
Size 958B
SHA256 b3d82956d486a27a7ba5c5cec61bbd4f6ce909acb5d47b38ecc825764f663d60
MD5 3b232416bb78909333b345591a62f654
SHA1 dd625318b84a30b59e7d8c9b87ee41747e226414
SHA512 6a4f6620278432327ed38bc737122f6a5d701e49a1d7bdcb8679537b1b697fb1c5ee1a7ff59d3aeaf98aaa7a41545dc3de8b1434cc3af9d7817d2cfc7212f30d
MD5 SHA1 SHA512

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memory/1336-54-0x00000000000D0000-0x0000000000112000-memory.dmp

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memory/1436-60-0x00000000008C0000-0x0000000000902000-memory.dmp

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memory/1436-140-0x0000000000350000-0x00000000003D0000-memory.dmp

Download

memory/1436-515-0x0000000000350000-0x00000000003D0000-memory.dmp

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