chaos | 612eb5c3269a264d1516904e24fe1bdfa17cb8a06441f03c483216eb52a9f526

Analysis

max time kernel
118s
max time network
119s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
30/07/2024, 17:54

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General

Target

2024-07-30_99177a95442cb3cd77f9359c948c9fbe_wannacry.exe
Size

188KB
MD5

99177a95442cb3cd77f9359c948c9fbe
SHA1

764af2058a89c8ffa7e704bdb84d4492bcae5be2
SHA256

612eb5c3269a264d1516904e24fe1bdfa17cb8a06441f03c483216eb52a9f526
SHA512

94b9a2eb93d3b0c53de4ab90c800ad4212d41faf34e3bc7e8d628140db0e62546596215fd2d5f3d6b6cfff614b9bf33c61b3b7c87278adada504862bcc8c4b9f
SSDEEP

3072:2osvQr9UpB/WcwALWP+nWVWRzO/LZLYq5r+6BQJAjrEzUV7kMq3LB4s:jr9Uv+KWP+nqei/Gq5aIjiUxFqt4

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/2876-1-0x00000000013E0000-0x0000000001416000-memory.dmp	family_chaos
behavioral1/files/0x0009000000012286-5.dat	family_chaos
behavioral1/memory/2608-7-0x0000000000370000-0x00000000003A6000-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
2164	bcdedit.exe
2276	bcdedit.exe

Renames multiple (194) 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
752	wbadmin.exe

Drops startup file 3 IoCs

description	ioc	Process
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
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.url	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2608	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\Favorites\Links\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\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\Favorites\Links for United States\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\Videos\Sample Videos\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\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\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-1506706701-1246725540-2219210854-1000\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\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Documents\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\Searches\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\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\Administrative 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\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\Music\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\Internet Explorer\Quick Launch\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\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\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-1-5-21-1506706701-1246725540-2219210854-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\y0oz9lo4p.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
2960	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
1776	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2608	svchost.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2876	2024-07-30_99177a95442cb3cd77f9359c948c9fbe_wannacry.exe
2876	2024-07-30_99177a95442cb3cd77f9359c948c9fbe_wannacry.exe
2876	2024-07-30_99177a95442cb3cd77f9359c948c9fbe_wannacry.exe
2608	svchost.exe
2608	svchost.exe
2608	svchost.exe
2608	svchost.exe
2608	svchost.exe
2608	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	2876	2024-07-30_99177a95442cb3cd77f9359c948c9fbe_wannacry.exe
Token: SeDebugPrivilege	2608	svchost.exe
Token: SeBackupPrivilege	2816	vssvc.exe
Token: SeRestorePrivilege	2816	vssvc.exe
Token: SeAuditPrivilege	2816	vssvc.exe
Token: SeIncreaseQuotaPrivilege	1276	WMIC.exe
Token: SeSecurityPrivilege	1276	WMIC.exe
Token: SeTakeOwnershipPrivilege	1276	WMIC.exe
Token: SeLoadDriverPrivilege	1276	WMIC.exe
Token: SeSystemProfilePrivilege	1276	WMIC.exe
Token: SeSystemtimePrivilege	1276	WMIC.exe
Token: SeProfSingleProcessPrivilege	1276	WMIC.exe
Token: SeIncBasePriorityPrivilege	1276	WMIC.exe
Token: SeCreatePagefilePrivilege	1276	WMIC.exe
Token: SeBackupPrivilege	1276	WMIC.exe
Token: SeRestorePrivilege	1276	WMIC.exe
Token: SeShutdownPrivilege	1276	WMIC.exe
Token: SeDebugPrivilege	1276	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1276	WMIC.exe
Token: SeRemoteShutdownPrivilege	1276	WMIC.exe
Token: SeUndockPrivilege	1276	WMIC.exe
Token: SeManageVolumePrivilege	1276	WMIC.exe
Token: 33	1276	WMIC.exe
Token: 34	1276	WMIC.exe
Token: 35	1276	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1276	WMIC.exe
Token: SeSecurityPrivilege	1276	WMIC.exe
Token: SeTakeOwnershipPrivilege	1276	WMIC.exe
Token: SeLoadDriverPrivilege	1276	WMIC.exe
Token: SeSystemProfilePrivilege	1276	WMIC.exe
Token: SeSystemtimePrivilege	1276	WMIC.exe
Token: SeProfSingleProcessPrivilege	1276	WMIC.exe
Token: SeIncBasePriorityPrivilege	1276	WMIC.exe
Token: SeCreatePagefilePrivilege	1276	WMIC.exe
Token: SeBackupPrivilege	1276	WMIC.exe
Token: SeRestorePrivilege	1276	WMIC.exe
Token: SeShutdownPrivilege	1276	WMIC.exe
Token: SeDebugPrivilege	1276	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1276	WMIC.exe
Token: SeRemoteShutdownPrivilege	1276	WMIC.exe
Token: SeUndockPrivilege	1276	WMIC.exe
Token: SeManageVolumePrivilege	1276	WMIC.exe
Token: 33	1276	WMIC.exe
Token: 34	1276	WMIC.exe
Token: 35	1276	WMIC.exe
Token: SeBackupPrivilege	2340	wbengine.exe
Token: SeRestorePrivilege	2340	wbengine.exe
Token: SeSecurityPrivilege	2340	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2876 wrote to memory of 2608	2876	2024-07-30_99177a95442cb3cd77f9359c948c9fbe_wannacry.exe	30
PID 2876 wrote to memory of 2608	2876	2024-07-30_99177a95442cb3cd77f9359c948c9fbe_wannacry.exe	30
PID 2876 wrote to memory of 2608	2876	2024-07-30_99177a95442cb3cd77f9359c948c9fbe_wannacry.exe	30
PID 2608 wrote to memory of 2236	2608	svchost.exe	32
PID 2608 wrote to memory of 2236	2608	svchost.exe	32
PID 2608 wrote to memory of 2236	2608	svchost.exe	32
PID 2236 wrote to memory of 2960	2236	cmd.exe	34
PID 2236 wrote to memory of 2960	2236	cmd.exe	34
PID 2236 wrote to memory of 2960	2236	cmd.exe	34
PID 2236 wrote to memory of 1276	2236	cmd.exe	37
PID 2236 wrote to memory of 1276	2236	cmd.exe	37
PID 2236 wrote to memory of 1276	2236	cmd.exe	37
PID 2608 wrote to memory of 2468	2608	svchost.exe	39
PID 2608 wrote to memory of 2468	2608	svchost.exe	39
PID 2608 wrote to memory of 2468	2608	svchost.exe	39
PID 2468 wrote to memory of 2164	2468	cmd.exe	41
PID 2468 wrote to memory of 2164	2468	cmd.exe	41
PID 2468 wrote to memory of 2164	2468	cmd.exe	41
PID 2468 wrote to memory of 2276	2468	cmd.exe	42
PID 2468 wrote to memory of 2276	2468	cmd.exe	42
PID 2468 wrote to memory of 2276	2468	cmd.exe	42
PID 2608 wrote to memory of 1528	2608	svchost.exe	43
PID 2608 wrote to memory of 1528	2608	svchost.exe	43
PID 2608 wrote to memory of 1528	2608	svchost.exe	43
PID 1528 wrote to memory of 752	1528	cmd.exe	45
PID 1528 wrote to memory of 752	1528	cmd.exe	45
PID 1528 wrote to memory of 752	1528	cmd.exe	45
PID 2608 wrote to memory of 1776	2608	svchost.exe	49
PID 2608 wrote to memory of 1776	2608	svchost.exe	49
PID 2608 wrote to memory of 1776	2608	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\2024-07-30_99177a95442cb3cd77f9359c948c9fbe_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-07-30_99177a95442cb3cd77f9359c948c9fbe_wannacry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2876
- 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:2608
- - 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:2236
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:2960
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:1276
- - 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:2468
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2164
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2276
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1528
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:752
- - 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:1776

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2816

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2340

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:2144

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:2196

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\svchost.exe

Filesize
188KB

MD5
99177a95442cb3cd77f9359c948c9fbe

SHA1
764af2058a89c8ffa7e704bdb84d4492bcae5be2

SHA256
612eb5c3269a264d1516904e24fe1bdfa17cb8a06441f03c483216eb52a9f526

SHA512
94b9a2eb93d3b0c53de4ab90c800ad4212d41faf34e3bc7e8d628140db0e62546596215fd2d5f3d6b6cfff614b9bf33c61b3b7c87278adada504862bcc8c4b9f

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

Filesize
26B

MD5
fd81f4f12c2e9ecc21818de1c27a84f0

SHA1
989b67fe179dc55003c848fd2f7a2ce56f3dd13c

SHA256
ad8408438868d3a62f80e9be24839df806d7196358c71cc9a7340486a528639c

SHA512
e47f8f1f0ea524c332beac13c6db4f8b2369881e688f3d776ed16dcbaf06ad11927900494e872a917610cee2f9f8bc26267dd07ab3fa5536e18d948712d59732

Download Submit
memory/2608-7-0x0000000000370000-0x00000000003A6000-memory.dmp

Filesize
216KB

Download
memory/2608-19-0x000007FEF5D90000-0x000007FEF677C000-memory.dmp

Filesize
9.9MB

Download
memory/2608-26-0x000007FEF5D90000-0x000007FEF677C000-memory.dmp

Filesize
9.9MB

Download
memory/2608-454-0x000007FEF5D90000-0x000007FEF677C000-memory.dmp

Filesize
9.9MB

Download
memory/2876-0-0x000007FEF5D93000-0x000007FEF5D94000-memory.dmp

Filesize
4KB

Download
memory/2876-1-0x00000000013E0000-0x0000000001416000-memory.dmp

Filesize
216KB

Download