chaos | c3cb824c21f93e55a2e8e15e431d9ebaee35b6a85f2764abf95e84dea4b6b765

Resubmissions

09/04/2024, 09:28

240409-lfmckseh9z 10

09/04/2024, 09:23

240409-lcyanseh5t 10

Analysis

max time kernel
119s
max time network
122s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
09/04/2024, 09:23

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General

Target

2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe
Size

1.9MB
MD5

6351587d8a4d02af63204e1f49b5ba56
SHA1

b0c64954ab96ba600ee37c37cfeacc43d04b0959
SHA256

c3cb824c21f93e55a2e8e15e431d9ebaee35b6a85f2764abf95e84dea4b6b765
SHA512

31f945a0b3a1602fa3e1766ee54fbdbaacd46942e7db304a179d5ed553a07649dddcb9c44c91d3a4e085c589f2bd1e0bc3064e12606418d89149b478e57204a7
SSDEEP

24576:o9/D6y/1yOeoErA7vMajzGDX9uZTUir0XZQQ3ffTRuNd7Ciq9VII7OQ:o9bIowAj53aXUZTZeQQwA5z

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/2624-0-0x00000000003D0000-0x00000000005B8000-memory.dmp	family_chaos
behavioral1/files/0x000a000000012241-5.dat	family_chaos
behavioral1/memory/2096-7-0x0000000000280000-0x0000000000468000-memory.dmp	family_chaos
behavioral1/memory/2096-438-0x0000000002310000-0x0000000002390000-memory.dmp	family_chaos

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

File Deletion
T1070.004

Inhibit System Recovery
T1490

Detects command variations typically used by ransomware 4 IoCs

resource	yara_rule
behavioral1/memory/2624-0-0x00000000003D0000-0x00000000005B8000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/files/0x000a000000012241-5.dat	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/memory/2096-7-0x0000000000280000-0x0000000000468000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/memory/2096-438-0x0000000002310000-0x0000000002390000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
936	bcdedit.exe
1700	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
1744	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\read_it.txt	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2096	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\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Documents\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\Favorites\Links for United States\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\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\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\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\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\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\Administrative Tools\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\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-2461186416-2307104501-1787948496-1000\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\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\Programs\Accessories\Accessibility\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\Sample Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Desktop\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\Libraries\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\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\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Searches\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Videos\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-1-5-21-2461186416-2307104501-1787948496-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\nuakahgl4.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 2 TTPs 1 IoCs

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

ransomware

File Deletion

T1070.004

Inhibit System Recovery

T1490

pid	Process
2520	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
1968	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2096	svchost.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2624	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe
2624	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe
2096	svchost.exe
2096	svchost.exe
2096	svchost.exe
2096	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	2624	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe
Token: SeDebugPrivilege	2096	svchost.exe
Token: SeBackupPrivilege	2636	vssvc.exe
Token: SeRestorePrivilege	2636	vssvc.exe
Token: SeAuditPrivilege	2636	vssvc.exe
Token: SeIncreaseQuotaPrivilege	1108	WMIC.exe
Token: SeSecurityPrivilege	1108	WMIC.exe
Token: SeTakeOwnershipPrivilege	1108	WMIC.exe
Token: SeLoadDriverPrivilege	1108	WMIC.exe
Token: SeSystemProfilePrivilege	1108	WMIC.exe
Token: SeSystemtimePrivilege	1108	WMIC.exe
Token: SeProfSingleProcessPrivilege	1108	WMIC.exe
Token: SeIncBasePriorityPrivilege	1108	WMIC.exe
Token: SeCreatePagefilePrivilege	1108	WMIC.exe
Token: SeBackupPrivilege	1108	WMIC.exe
Token: SeRestorePrivilege	1108	WMIC.exe
Token: SeShutdownPrivilege	1108	WMIC.exe
Token: SeDebugPrivilege	1108	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1108	WMIC.exe
Token: SeRemoteShutdownPrivilege	1108	WMIC.exe
Token: SeUndockPrivilege	1108	WMIC.exe
Token: SeManageVolumePrivilege	1108	WMIC.exe
Token: 33	1108	WMIC.exe
Token: 34	1108	WMIC.exe
Token: 35	1108	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1108	WMIC.exe
Token: SeSecurityPrivilege	1108	WMIC.exe
Token: SeTakeOwnershipPrivilege	1108	WMIC.exe
Token: SeLoadDriverPrivilege	1108	WMIC.exe
Token: SeSystemProfilePrivilege	1108	WMIC.exe
Token: SeSystemtimePrivilege	1108	WMIC.exe
Token: SeProfSingleProcessPrivilege	1108	WMIC.exe
Token: SeIncBasePriorityPrivilege	1108	WMIC.exe
Token: SeCreatePagefilePrivilege	1108	WMIC.exe
Token: SeBackupPrivilege	1108	WMIC.exe
Token: SeRestorePrivilege	1108	WMIC.exe
Token: SeShutdownPrivilege	1108	WMIC.exe
Token: SeDebugPrivilege	1108	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1108	WMIC.exe
Token: SeRemoteShutdownPrivilege	1108	WMIC.exe
Token: SeUndockPrivilege	1108	WMIC.exe
Token: SeManageVolumePrivilege	1108	WMIC.exe
Token: 33	1108	WMIC.exe
Token: 34	1108	WMIC.exe
Token: 35	1108	WMIC.exe
Token: SeBackupPrivilege	2972	wbengine.exe
Token: SeRestorePrivilege	2972	wbengine.exe
Token: SeSecurityPrivilege	2972	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2624 wrote to memory of 2096	2624	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe	28
PID 2624 wrote to memory of 2096	2624	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe	28
PID 2624 wrote to memory of 2096	2624	2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe	28
PID 2096 wrote to memory of 1652	2096	svchost.exe	31
PID 2096 wrote to memory of 1652	2096	svchost.exe	31
PID 2096 wrote to memory of 1652	2096	svchost.exe	31
PID 1652 wrote to memory of 2520	1652	cmd.exe	33
PID 1652 wrote to memory of 2520	1652	cmd.exe	33
PID 1652 wrote to memory of 2520	1652	cmd.exe	33
PID 1652 wrote to memory of 1108	1652	cmd.exe	36
PID 1652 wrote to memory of 1108	1652	cmd.exe	36
PID 1652 wrote to memory of 1108	1652	cmd.exe	36
PID 2096 wrote to memory of 2792	2096	svchost.exe	38
PID 2096 wrote to memory of 2792	2096	svchost.exe	38
PID 2096 wrote to memory of 2792	2096	svchost.exe	38
PID 2792 wrote to memory of 936	2792	cmd.exe	40
PID 2792 wrote to memory of 936	2792	cmd.exe	40
PID 2792 wrote to memory of 936	2792	cmd.exe	40
PID 2792 wrote to memory of 1700	2792	cmd.exe	41
PID 2792 wrote to memory of 1700	2792	cmd.exe	41
PID 2792 wrote to memory of 1700	2792	cmd.exe	41
PID 2096 wrote to memory of 2776	2096	svchost.exe	42
PID 2096 wrote to memory of 2776	2096	svchost.exe	42
PID 2096 wrote to memory of 2776	2096	svchost.exe	42
PID 2776 wrote to memory of 1744	2776	cmd.exe	44
PID 2776 wrote to memory of 1744	2776	cmd.exe	44
PID 2776 wrote to memory of 1744	2776	cmd.exe	44
PID 2096 wrote to memory of 1968	2096	svchost.exe	48
PID 2096 wrote to memory of 1968	2096	svchost.exe	48
PID 2096 wrote to memory of 1968	2096	svchost.exe	48

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\2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-09_6351587d8a4d02af63204e1f49b5ba56_wannacry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2624
- 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:2096
- - 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:1652
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:2520
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:1108
- - 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:2792
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:936
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1700
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2776
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:1744
- - 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:1968

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2636

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2972

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:2244

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:1324

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Persistence

Privilege Escalation

Defense Evasion

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
1.9MB

MD5
6351587d8a4d02af63204e1f49b5ba56

SHA1
b0c64954ab96ba600ee37c37cfeacc43d04b0959

SHA256
c3cb824c21f93e55a2e8e15e431d9ebaee35b6a85f2764abf95e84dea4b6b765

SHA512
31f945a0b3a1602fa3e1766ee54fbdbaacd46942e7db304a179d5ed553a07649dddcb9c44c91d3a4e085c589f2bd1e0bc3064e12606418d89149b478e57204a7

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

Filesize
870B

MD5
4f4a1d049c7d46b5d3196bae54db0c76

SHA1
3952e4327a7302ce60de180cd612df56c94b40a8

SHA256
ff42e4254c02143eecd9544fb72620ca49b40a0b5830c17099150a97fad9eb5c

SHA512
2ea06eca3d60c7011f44a637a4d097f1165093a1e80d075ed177d6ef4c68320a27ff0db0afbdd110db2adf58312c90f6efef493882d36dedaef8c5a18bb50483

Download Submit
memory/2096-7-0x0000000000280000-0x0000000000468000-memory.dmp

Filesize
1.9MB

Download
memory/2096-9-0x000007FEF61D0000-0x000007FEF6BBC000-memory.dmp

Filesize
9.9MB

Download
memory/2096-11-0x0000000002310000-0x0000000002390000-memory.dmp

Filesize
512KB

Download
memory/2096-437-0x000007FEF61D0000-0x000007FEF6BBC000-memory.dmp

Filesize
9.9MB

Download
memory/2096-438-0x0000000002310000-0x0000000002390000-memory.dmp

Filesize
512KB

Download
memory/2624-0-0x00000000003D0000-0x00000000005B8000-memory.dmp

Filesize
1.9MB

Download
memory/2624-1-0x000007FEF61D0000-0x000007FEF6BBC000-memory.dmp

Filesize
9.9MB

Download
memory/2624-8-0x000007FEF61D0000-0x000007FEF6BBC000-memory.dmp

Filesize
9.9MB

Download