chaos | 1ce6d9140ca332a2637b715acfc3f391632a28800c18a7d75c59414dadc63ba1

Analysis

max time kernel
122s
max time network
123s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
31-12-2024 02:26

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General

Target

2024-12-31_dcc1c79dec7e10f81ca1d238c389f398_wannacry.exe
Size

181KB
MD5

dcc1c79dec7e10f81ca1d238c389f398
SHA1

9aab2830804da5f4d7b7cf487393abae5706254f
SHA256

1ce6d9140ca332a2637b715acfc3f391632a28800c18a7d75c59414dadc63ba1
SHA512

210254af182f3abcea957f0008e1e4f128b8568fdaf634fe48b52c9a30195cd68ab084e7a0022238017e222dbd4421e897a4e4c46584389f4190032985cb46d8
SSDEEP

3072:Fo0QhE4r9EtcHbFTohJRILxd1dJC47cblzcnXwEKu2k3ParRkVibgfFZ6kvS0dl2:/Or9EtgTcJuLpjUAQk3i+wb+wkq0z

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/1732-1-0x0000000000ED0000-0x0000000000F04000-memory.dmp	family_chaos
behavioral1/files/0x00080000000120ff-5.dat	family_chaos
behavioral1/memory/2492-7-0x0000000000340000-0x0000000000374000-memory.dmp	family_chaos

Chaos 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
276	bcdedit.exe
352	bcdedit.exe

Renames multiple (186) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

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
2148	wbadmin.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\Ezz.txt	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2492	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\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\Pictures\Sample Pictures\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-3533259084-2542256011-65585152-1000\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\Internet Explorer\Quick Launch\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\Accessories\Accessibility\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\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\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\Internet Explorer\Quick Launch\User Pinned\TaskBar\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\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\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\Admin\Links\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\Programs\Accessories\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\Favorites\Links for United States\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\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\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\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-1-5-21-3533259084-2542256011-65585152-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\sm8k53u63.jpg"	svchost.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
604	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
236	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2492	svchost.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
1732	2024-12-31_dcc1c79dec7e10f81ca1d238c389f398_wannacry.exe
1732	2024-12-31_dcc1c79dec7e10f81ca1d238c389f398_wannacry.exe
1732	2024-12-31_dcc1c79dec7e10f81ca1d238c389f398_wannacry.exe
2492	svchost.exe
2492	svchost.exe
2492	svchost.exe
2492	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	1732	2024-12-31_dcc1c79dec7e10f81ca1d238c389f398_wannacry.exe
Token: SeDebugPrivilege	2492	svchost.exe
Token: SeBackupPrivilege	1684	vssvc.exe
Token: SeRestorePrivilege	1684	vssvc.exe
Token: SeAuditPrivilege	1684	vssvc.exe
Token: SeIncreaseQuotaPrivilege	2204	WMIC.exe
Token: SeSecurityPrivilege	2204	WMIC.exe
Token: SeTakeOwnershipPrivilege	2204	WMIC.exe
Token: SeLoadDriverPrivilege	2204	WMIC.exe
Token: SeSystemProfilePrivilege	2204	WMIC.exe
Token: SeSystemtimePrivilege	2204	WMIC.exe
Token: SeProfSingleProcessPrivilege	2204	WMIC.exe
Token: SeIncBasePriorityPrivilege	2204	WMIC.exe
Token: SeCreatePagefilePrivilege	2204	WMIC.exe
Token: SeBackupPrivilege	2204	WMIC.exe
Token: SeRestorePrivilege	2204	WMIC.exe
Token: SeShutdownPrivilege	2204	WMIC.exe
Token: SeDebugPrivilege	2204	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2204	WMIC.exe
Token: SeRemoteShutdownPrivilege	2204	WMIC.exe
Token: SeUndockPrivilege	2204	WMIC.exe
Token: SeManageVolumePrivilege	2204	WMIC.exe
Token: 33	2204	WMIC.exe
Token: 34	2204	WMIC.exe
Token: 35	2204	WMIC.exe
Token: SeIncreaseQuotaPrivilege	2204	WMIC.exe
Token: SeSecurityPrivilege	2204	WMIC.exe
Token: SeTakeOwnershipPrivilege	2204	WMIC.exe
Token: SeLoadDriverPrivilege	2204	WMIC.exe
Token: SeSystemProfilePrivilege	2204	WMIC.exe
Token: SeSystemtimePrivilege	2204	WMIC.exe
Token: SeProfSingleProcessPrivilege	2204	WMIC.exe
Token: SeIncBasePriorityPrivilege	2204	WMIC.exe
Token: SeCreatePagefilePrivilege	2204	WMIC.exe
Token: SeBackupPrivilege	2204	WMIC.exe
Token: SeRestorePrivilege	2204	WMIC.exe
Token: SeShutdownPrivilege	2204	WMIC.exe
Token: SeDebugPrivilege	2204	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2204	WMIC.exe
Token: SeRemoteShutdownPrivilege	2204	WMIC.exe
Token: SeUndockPrivilege	2204	WMIC.exe
Token: SeManageVolumePrivilege	2204	WMIC.exe
Token: 33	2204	WMIC.exe
Token: 34	2204	WMIC.exe
Token: 35	2204	WMIC.exe
Token: SeBackupPrivilege	3036	wbengine.exe
Token: SeRestorePrivilege	3036	wbengine.exe
Token: SeSecurityPrivilege	3036	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1732 wrote to memory of 2492	1732	2024-12-31_dcc1c79dec7e10f81ca1d238c389f398_wannacry.exe	30
PID 1732 wrote to memory of 2492	1732	2024-12-31_dcc1c79dec7e10f81ca1d238c389f398_wannacry.exe	30
PID 1732 wrote to memory of 2492	1732	2024-12-31_dcc1c79dec7e10f81ca1d238c389f398_wannacry.exe	30
PID 2492 wrote to memory of 2436	2492	svchost.exe	32
PID 2492 wrote to memory of 2436	2492	svchost.exe	32
PID 2492 wrote to memory of 2436	2492	svchost.exe	32
PID 2436 wrote to memory of 604	2436	cmd.exe	34
PID 2436 wrote to memory of 604	2436	cmd.exe	34
PID 2436 wrote to memory of 604	2436	cmd.exe	34
PID 2436 wrote to memory of 2204	2436	cmd.exe	37
PID 2436 wrote to memory of 2204	2436	cmd.exe	37
PID 2436 wrote to memory of 2204	2436	cmd.exe	37
PID 2492 wrote to memory of 2020	2492	svchost.exe	39
PID 2492 wrote to memory of 2020	2492	svchost.exe	39
PID 2492 wrote to memory of 2020	2492	svchost.exe	39
PID 2020 wrote to memory of 276	2020	cmd.exe	41
PID 2020 wrote to memory of 276	2020	cmd.exe	41
PID 2020 wrote to memory of 276	2020	cmd.exe	41
PID 2020 wrote to memory of 352	2020	cmd.exe	42
PID 2020 wrote to memory of 352	2020	cmd.exe	42
PID 2020 wrote to memory of 352	2020	cmd.exe	42
PID 2492 wrote to memory of 776	2492	svchost.exe	43
PID 2492 wrote to memory of 776	2492	svchost.exe	43
PID 2492 wrote to memory of 776	2492	svchost.exe	43
PID 776 wrote to memory of 2148	776	cmd.exe	45
PID 776 wrote to memory of 2148	776	cmd.exe	45
PID 776 wrote to memory of 2148	776	cmd.exe	45
PID 2492 wrote to memory of 236	2492	svchost.exe	49
PID 2492 wrote to memory of 236	2492	svchost.exe	49
PID 2492 wrote to memory of 236	2492	svchost.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\2024-12-31_dcc1c79dec7e10f81ca1d238c389f398_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-12-31_dcc1c79dec7e10f81ca1d238c389f398_wannacry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1732
- C:\Users\Admin\AppData\Roaming\svchost.exe
  "C:\Users\Admin\AppData\Roaming\svchost.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:2492
- - 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:2436
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:604
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:2204
- - 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:2020
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:276
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:352
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:776
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:2148
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\Ezz.txt
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:236

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1684

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3036

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:1084

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:1140

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

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
181KB

MD5
dcc1c79dec7e10f81ca1d238c389f398

SHA1
9aab2830804da5f4d7b7cf487393abae5706254f

SHA256
1ce6d9140ca332a2637b715acfc3f391632a28800c18a7d75c59414dadc63ba1

SHA512
210254af182f3abcea957f0008e1e4f128b8568fdaf634fe48b52c9a30195cd68ab084e7a0022238017e222dbd4421e897a4e4c46584389f4190032985cb46d8

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

Filesize
505B

MD5
21cb8936f3cac737a430a9a632a37d11

SHA1
445ac82863280c5719f64581f7b3909b3685c045

SHA256
f9614361838799b9ae9e74b02ac419bfb94d35a777efb1a3d211a4476f99a974

SHA512
dc04863dfb7febfc45ce0f7cbd19d8079c405c9d6504623cf6b38bfd1f373a8fce9a8b3b9ac598ccb6c46ca19cf5d6538532d1c8319b8ba5b31fe73bc94e9c90

Download Submit
memory/1732-0-0x000007FEF5DE3000-0x000007FEF5DE4000-memory.dmp

Filesize
4KB

Download
memory/1732-1-0x0000000000ED0000-0x0000000000F04000-memory.dmp

Filesize
208KB

Download
memory/2492-7-0x0000000000340000-0x0000000000374000-memory.dmp

Filesize
208KB

Download
memory/2492-8-0x000007FEF5DE0000-0x000007FEF67CC000-memory.dmp

Filesize
9.9MB

Download
memory/2492-10-0x000007FEF5DE0000-0x000007FEF67CC000-memory.dmp

Filesize
9.9MB

Download
memory/2492-438-0x000007FEF5DE0000-0x000007FEF67CC000-memory.dmp

Filesize
9.9MB

Download