chaos | fa0a4f9d71cde33626ac77ca1d5f5ff98af968446787dbe097cc36ea6f5ae87a

Resubmissions

30-08-2024 14:26

240830-rr253ayfjc 10

30-08-2024 09:28

240830-lfmncaxamh 10

Analysis

max time kernel
22s
max time network
16s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
30-08-2024 09:28

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General

Target

2024-08-30_81605de48f66887272b879486dfc07a8_destroyer_wannacry.exe
Size

68KB
MD5

81605de48f66887272b879486dfc07a8
SHA1

cc58705c7ec749a5a9177125b216c9ee0ee0bb93
SHA256

fa0a4f9d71cde33626ac77ca1d5f5ff98af968446787dbe097cc36ea6f5ae87a
SHA512

d288d845acf7d9b7c41bf6cf2894d4671577fbbbf98856d357bbd7c09744da9979ae0f643e5c10ca76029721749bceecbfeb9b7a54b33a596af0ab66791fbf6a
SSDEEP

1536:io2zsW1l0vr90fEcB04Cwo2zsW1l0vr90fEcB04C:ioETz0vr90fEcdCwoETz0vr90fEcdC

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 3 IoCs

resource	yara_rule
behavioral1/memory/2440-1-0x0000000000050000-0x000000000005E000-memory.dmp	family_chaos
behavioral1/files/0x00080000000120fd-6.dat	family_chaos
behavioral1/memory/2808-9-0x00000000011F0000-0x00000000011FE000-memory.dmp	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
476	bcdedit.exe
2148	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
2200	wbadmin.exe

Drops startup file 3 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Runtime Broker.url	Runtime Broker.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini	Runtime Broker.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\LEIA-ME.txt	Runtime Broker.exe

Executes dropped EXE 1 IoCs

pid	Process
2808	Runtime Broker.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\Public\Pictures\desktop.ini	Runtime Broker.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	Runtime Broker.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	Runtime Broker.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	Runtime Broker.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini	Runtime Broker.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini	Runtime Broker.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini	Runtime Broker.exe
File opened for modification	C:\Users\Admin\Videos\desktop.ini	Runtime Broker.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini	Runtime Broker.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-2703099537-420551529-3771253338-1000\desktop.ini	Runtime Broker.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	Runtime Broker.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	Runtime Broker.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	Runtime Broker.exe
File opened for modification	C:\Users\Public\Music\Sample Music\desktop.ini	Runtime Broker.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	Runtime Broker.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini	Runtime Broker.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini	Runtime Broker.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini	Runtime Broker.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini	Runtime Broker.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	Runtime Broker.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini	Runtime Broker.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	Runtime Broker.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	Runtime Broker.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	Runtime Broker.exe
File opened for modification	C:\Users\Admin\Searches\desktop.ini	Runtime Broker.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	Runtime Broker.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini	Runtime Broker.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	Runtime Broker.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	Runtime Broker.exe
File opened for modification	C:\Users\Admin\Favorites\Links for United States\desktop.ini	Runtime Broker.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini	Runtime Broker.exe
File opened for modification	C:\Users\Public\Pictures\Sample Pictures\desktop.ini	Runtime Broker.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini	Runtime Broker.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\desktop.ini	Runtime Broker.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-1-5-21-2703099537-420551529-3771253338-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\8t2sg7107.jpg"	Runtime Broker.exe

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

System Information Discovery
T1082

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
2980	vssadmin.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2808	Runtime Broker.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
2440	2024-08-30_81605de48f66887272b879486dfc07a8_destroyer_wannacry.exe
2440	2024-08-30_81605de48f66887272b879486dfc07a8_destroyer_wannacry.exe
2440	2024-08-30_81605de48f66887272b879486dfc07a8_destroyer_wannacry.exe
2808	Runtime Broker.exe
2808	Runtime Broker.exe
2808	Runtime Broker.exe
2808	Runtime Broker.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	2440	2024-08-30_81605de48f66887272b879486dfc07a8_destroyer_wannacry.exe
Token: SeDebugPrivilege	2808	Runtime Broker.exe
Token: SeBackupPrivilege	2384	vssvc.exe
Token: SeRestorePrivilege	2384	vssvc.exe
Token: SeAuditPrivilege	2384	vssvc.exe
Token: SeIncreaseQuotaPrivilege	320	WMIC.exe
Token: SeSecurityPrivilege	320	WMIC.exe
Token: SeTakeOwnershipPrivilege	320	WMIC.exe
Token: SeLoadDriverPrivilege	320	WMIC.exe
Token: SeSystemProfilePrivilege	320	WMIC.exe
Token: SeSystemtimePrivilege	320	WMIC.exe
Token: SeProfSingleProcessPrivilege	320	WMIC.exe
Token: SeIncBasePriorityPrivilege	320	WMIC.exe
Token: SeCreatePagefilePrivilege	320	WMIC.exe
Token: SeBackupPrivilege	320	WMIC.exe
Token: SeRestorePrivilege	320	WMIC.exe
Token: SeShutdownPrivilege	320	WMIC.exe
Token: SeDebugPrivilege	320	WMIC.exe
Token: SeSystemEnvironmentPrivilege	320	WMIC.exe
Token: SeRemoteShutdownPrivilege	320	WMIC.exe
Token: SeUndockPrivilege	320	WMIC.exe
Token: SeManageVolumePrivilege	320	WMIC.exe
Token: 33	320	WMIC.exe
Token: 34	320	WMIC.exe
Token: 35	320	WMIC.exe
Token: SeIncreaseQuotaPrivilege	320	WMIC.exe
Token: SeSecurityPrivilege	320	WMIC.exe
Token: SeTakeOwnershipPrivilege	320	WMIC.exe
Token: SeLoadDriverPrivilege	320	WMIC.exe
Token: SeSystemProfilePrivilege	320	WMIC.exe
Token: SeSystemtimePrivilege	320	WMIC.exe
Token: SeProfSingleProcessPrivilege	320	WMIC.exe
Token: SeIncBasePriorityPrivilege	320	WMIC.exe
Token: SeCreatePagefilePrivilege	320	WMIC.exe
Token: SeBackupPrivilege	320	WMIC.exe
Token: SeRestorePrivilege	320	WMIC.exe
Token: SeShutdownPrivilege	320	WMIC.exe
Token: SeDebugPrivilege	320	WMIC.exe
Token: SeSystemEnvironmentPrivilege	320	WMIC.exe
Token: SeRemoteShutdownPrivilege	320	WMIC.exe
Token: SeUndockPrivilege	320	WMIC.exe
Token: SeManageVolumePrivilege	320	WMIC.exe
Token: 33	320	WMIC.exe
Token: 34	320	WMIC.exe
Token: 35	320	WMIC.exe
Token: SeBackupPrivilege	1792	wbengine.exe
Token: SeRestorePrivilege	1792	wbengine.exe
Token: SeSecurityPrivilege	1792	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2440 wrote to memory of 2808	2440	2024-08-30_81605de48f66887272b879486dfc07a8_destroyer_wannacry.exe	30
PID 2440 wrote to memory of 2808	2440	2024-08-30_81605de48f66887272b879486dfc07a8_destroyer_wannacry.exe	30
PID 2440 wrote to memory of 2808	2440	2024-08-30_81605de48f66887272b879486dfc07a8_destroyer_wannacry.exe	30
PID 2808 wrote to memory of 2984	2808	Runtime Broker.exe	32
PID 2808 wrote to memory of 2984	2808	Runtime Broker.exe	32
PID 2808 wrote to memory of 2984	2808	Runtime Broker.exe	32
PID 2984 wrote to memory of 2980	2984	cmd.exe	34
PID 2984 wrote to memory of 2980	2984	cmd.exe	34
PID 2984 wrote to memory of 2980	2984	cmd.exe	34
PID 2984 wrote to memory of 320	2984	cmd.exe	37
PID 2984 wrote to memory of 320	2984	cmd.exe	37
PID 2984 wrote to memory of 320	2984	cmd.exe	37
PID 2808 wrote to memory of 2300	2808	Runtime Broker.exe	39
PID 2808 wrote to memory of 2300	2808	Runtime Broker.exe	39
PID 2808 wrote to memory of 2300	2808	Runtime Broker.exe	39
PID 2300 wrote to memory of 476	2300	cmd.exe	41
PID 2300 wrote to memory of 476	2300	cmd.exe	41
PID 2300 wrote to memory of 476	2300	cmd.exe	41
PID 2300 wrote to memory of 2148	2300	cmd.exe	42
PID 2300 wrote to memory of 2148	2300	cmd.exe	42
PID 2300 wrote to memory of 2148	2300	cmd.exe	42
PID 2808 wrote to memory of 2296	2808	Runtime Broker.exe	43
PID 2808 wrote to memory of 2296	2808	Runtime Broker.exe	43
PID 2808 wrote to memory of 2296	2808	Runtime Broker.exe	43
PID 2296 wrote to memory of 2200	2296	cmd.exe	45
PID 2296 wrote to memory of 2200	2296	cmd.exe	45
PID 2296 wrote to memory of 2200	2296	cmd.exe	45
PID 2808 wrote to memory of 2516	2808	Runtime Broker.exe	49
PID 2808 wrote to memory of 2516	2808	Runtime Broker.exe	49
PID 2808 wrote to memory of 2516	2808	Runtime Broker.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\2024-08-30_81605de48f66887272b879486dfc07a8_destroyer_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-08-30_81605de48f66887272b879486dfc07a8_destroyer_wannacry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2440
- C:\Users\Admin\AppData\Roaming\Runtime Broker.exe
  "C:\Users\Admin\AppData\Roaming\Runtime Broker.exe"
  2⤵
  - 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:2808
- - 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:2984
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:2980
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:320
- - 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:2300
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:476
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2148
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2296
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:2200
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\LEIA-ME.txt
    3⤵
    PID:2516

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2384

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1792

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:780

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:592

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

Unsecured Credentials

T1552

Credentials In Files

T1552.001

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

C:\Users\Admin\AppData\Roaming\Runtime Broker.exe

Filesize
68KB

MD5
81605de48f66887272b879486dfc07a8

SHA1
cc58705c7ec749a5a9177125b216c9ee0ee0bb93

SHA256
fa0a4f9d71cde33626ac77ca1d5f5ff98af968446787dbe097cc36ea6f5ae87a

SHA512
d288d845acf7d9b7c41bf6cf2894d4671577fbbbf98856d357bbd7c09744da9979ae0f643e5c10ca76029721749bceecbfeb9b7a54b33a596af0ab66791fbf6a

Download Submit
C:\Users\Admin\Documents\LEIA-ME.txt

Filesize
746B

MD5
0aa302be2ad74a8c162f366263ef23be

SHA1
40477cd6815f51dc69fa8069f30a6d7b4924fd9b

SHA256
93d5b98fbb9a4e245ee93b2cb7699e38d699addc64b050cf93040887efd02d59

SHA512
8d0764b9005653fabc98738ad8ce32e3c44bc9f8416cec865b96bc7797b499fd4f6ed1c0e24bc7132f318bf22cd0bbf164edcb383cb944d339bf3f8f55a18171

Download Submit
memory/2440-0-0x000007FEF5AF3000-0x000007FEF5AF4000-memory.dmp

Filesize
4KB

Download
memory/2440-1-0x0000000000050000-0x000000000005E000-memory.dmp

Filesize
56KB

Download
memory/2440-2-0x000007FEF5AF3000-0x000007FEF5AF4000-memory.dmp

Filesize
4KB

Download
memory/2808-8-0x000007FEF5103000-0x000007FEF5104000-memory.dmp

Filesize
4KB

Download
memory/2808-9-0x00000000011F0000-0x00000000011FE000-memory.dmp

Filesize
56KB

Download
memory/2808-23-0x000007FEF5100000-0x000007FEF5AEC000-memory.dmp

Filesize
9.9MB

Download
memory/2808-478-0x000007FEF5103000-0x000007FEF5104000-memory.dmp

Filesize
4KB

Download
memory/2808-479-0x000007FEF5100000-0x000007FEF5AEC000-memory.dmp

Filesize
9.9MB

Download