chaos | 572530f3c886117ad18383611b16ef706006ba4b8066556796a9fef31b66afee

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
15-04-2024 06:26

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General

Target

2024-04-15_48b2f2ff197d07bc81684a2c9d7931a9_wannacry.exe
Size

1.9MB
MD5

48b2f2ff197d07bc81684a2c9d7931a9
SHA1

251ecba34be36e310eecaa134cb628f0828a434d
SHA256

572530f3c886117ad18383611b16ef706006ba4b8066556796a9fef31b66afee
SHA512

4ee90ddfef8d6ac2b5d3326bd377f686c5993f06625bc934a39fda1aafd6399c97ca5af87c7685ae257ed156cb965747b98d7740fa7d2b9fd09a6105c55d029c
SSDEEP

24576:d9/D6y/1yOeoErA7vMajzGDX9uZTUir0XZQQ3ffTRuNd7Ciq9VII7O:d9bIowAj53aXUZTZeQQwA5

Score

10^/10

chaos evasion 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/2108-0-0x0000000000860000-0x0000000000A48000-memory.dmp	family_chaos
behavioral1/files/0x000c0000000133c1-5.dat	family_chaos
behavioral1/memory/3060-7-0x0000000000A20000-0x0000000000C08000-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 3 IoCs

resource	yara_rule
behavioral1/memory/2108-0-0x0000000000860000-0x0000000000A48000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/files/0x000c0000000133c1-5.dat	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/memory/3060-7-0x0000000000A20000-0x0000000000C08000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
2236	bcdedit.exe
2072	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
2756	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
3060	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\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\Public\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-3787592910-3720486031-2929222812-1000\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\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\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\Windows\Libraries\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\Links\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	C:\Users\Public\Desktop\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\Programs\Accessories\Accessibility\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\SendTo\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\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Documents\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\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\Downloads\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\Accessories\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\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\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-1-5-21-3787592910-3720486031-2929222812-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ri2nc2kxl.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
2844	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
1172	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
3060	svchost.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2108	2024-04-15_48b2f2ff197d07bc81684a2c9d7931a9_wannacry.exe
2108	2024-04-15_48b2f2ff197d07bc81684a2c9d7931a9_wannacry.exe
3060	svchost.exe
3060	svchost.exe
3060	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	2108	2024-04-15_48b2f2ff197d07bc81684a2c9d7931a9_wannacry.exe
Token: SeDebugPrivilege	3060	svchost.exe
Token: SeBackupPrivilege	1068	vssvc.exe
Token: SeRestorePrivilege	1068	vssvc.exe
Token: SeAuditPrivilege	1068	vssvc.exe
Token: SeIncreaseQuotaPrivilege	2680	WMIC.exe
Token: SeSecurityPrivilege	2680	WMIC.exe
Token: SeTakeOwnershipPrivilege	2680	WMIC.exe
Token: SeLoadDriverPrivilege	2680	WMIC.exe
Token: SeSystemProfilePrivilege	2680	WMIC.exe
Token: SeSystemtimePrivilege	2680	WMIC.exe
Token: SeProfSingleProcessPrivilege	2680	WMIC.exe
Token: SeIncBasePriorityPrivilege	2680	WMIC.exe
Token: SeCreatePagefilePrivilege	2680	WMIC.exe
Token: SeBackupPrivilege	2680	WMIC.exe
Token: SeRestorePrivilege	2680	WMIC.exe
Token: SeShutdownPrivilege	2680	WMIC.exe
Token: SeDebugPrivilege	2680	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2680	WMIC.exe
Token: SeRemoteShutdownPrivilege	2680	WMIC.exe
Token: SeUndockPrivilege	2680	WMIC.exe
Token: SeManageVolumePrivilege	2680	WMIC.exe
Token: 33	2680	WMIC.exe
Token: 34	2680	WMIC.exe
Token: 35	2680	WMIC.exe
Token: SeIncreaseQuotaPrivilege	2680	WMIC.exe
Token: SeSecurityPrivilege	2680	WMIC.exe
Token: SeTakeOwnershipPrivilege	2680	WMIC.exe
Token: SeLoadDriverPrivilege	2680	WMIC.exe
Token: SeSystemProfilePrivilege	2680	WMIC.exe
Token: SeSystemtimePrivilege	2680	WMIC.exe
Token: SeProfSingleProcessPrivilege	2680	WMIC.exe
Token: SeIncBasePriorityPrivilege	2680	WMIC.exe
Token: SeCreatePagefilePrivilege	2680	WMIC.exe
Token: SeBackupPrivilege	2680	WMIC.exe
Token: SeRestorePrivilege	2680	WMIC.exe
Token: SeShutdownPrivilege	2680	WMIC.exe
Token: SeDebugPrivilege	2680	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2680	WMIC.exe
Token: SeRemoteShutdownPrivilege	2680	WMIC.exe
Token: SeUndockPrivilege	2680	WMIC.exe
Token: SeManageVolumePrivilege	2680	WMIC.exe
Token: 33	2680	WMIC.exe
Token: 34	2680	WMIC.exe
Token: 35	2680	WMIC.exe
Token: SeBackupPrivilege	3032	wbengine.exe
Token: SeRestorePrivilege	3032	wbengine.exe
Token: SeSecurityPrivilege	3032	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2108 wrote to memory of 3060	2108	2024-04-15_48b2f2ff197d07bc81684a2c9d7931a9_wannacry.exe	28
PID 2108 wrote to memory of 3060	2108	2024-04-15_48b2f2ff197d07bc81684a2c9d7931a9_wannacry.exe	28
PID 2108 wrote to memory of 3060	2108	2024-04-15_48b2f2ff197d07bc81684a2c9d7931a9_wannacry.exe	28
PID 3060 wrote to memory of 2712	3060	svchost.exe	30
PID 3060 wrote to memory of 2712	3060	svchost.exe	30
PID 3060 wrote to memory of 2712	3060	svchost.exe	30
PID 2712 wrote to memory of 2844	2712	cmd.exe	32
PID 2712 wrote to memory of 2844	2712	cmd.exe	32
PID 2712 wrote to memory of 2844	2712	cmd.exe	32
PID 2712 wrote to memory of 2680	2712	cmd.exe	36
PID 2712 wrote to memory of 2680	2712	cmd.exe	36
PID 2712 wrote to memory of 2680	2712	cmd.exe	36
PID 3060 wrote to memory of 1732	3060	svchost.exe	38
PID 3060 wrote to memory of 1732	3060	svchost.exe	38
PID 3060 wrote to memory of 1732	3060	svchost.exe	38
PID 1732 wrote to memory of 2236	1732	cmd.exe	40
PID 1732 wrote to memory of 2236	1732	cmd.exe	40
PID 1732 wrote to memory of 2236	1732	cmd.exe	40
PID 1732 wrote to memory of 2072	1732	cmd.exe	41
PID 1732 wrote to memory of 2072	1732	cmd.exe	41
PID 1732 wrote to memory of 2072	1732	cmd.exe	41
PID 3060 wrote to memory of 2252	3060	svchost.exe	42
PID 3060 wrote to memory of 2252	3060	svchost.exe	42
PID 3060 wrote to memory of 2252	3060	svchost.exe	42
PID 2252 wrote to memory of 2756	2252	cmd.exe	44
PID 2252 wrote to memory of 2756	2252	cmd.exe	44
PID 2252 wrote to memory of 2756	2252	cmd.exe	44
PID 3060 wrote to memory of 1172	3060	svchost.exe	48
PID 3060 wrote to memory of 1172	3060	svchost.exe	48
PID 3060 wrote to memory of 1172	3060	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\2024-04-15_48b2f2ff197d07bc81684a2c9d7931a9_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-15_48b2f2ff197d07bc81684a2c9d7931a9_wannacry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2108
- 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:3060
- - 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:2712
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:2844
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:2680
- - 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:1732
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2236
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2072
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2252
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:2756
- - 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:1172

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1068

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3032

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:2268

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:2328

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
48b2f2ff197d07bc81684a2c9d7931a9

SHA1
251ecba34be36e310eecaa134cb628f0828a434d

SHA256
572530f3c886117ad18383611b16ef706006ba4b8066556796a9fef31b66afee

SHA512
4ee90ddfef8d6ac2b5d3326bd377f686c5993f06625bc934a39fda1aafd6399c97ca5af87c7685ae257ed156cb965747b98d7740fa7d2b9fd09a6105c55d029c

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

Filesize
870B

MD5
4f4a1d049c7d46b5d3196bae54db0c76

SHA1
3952e4327a7302ce60de180cd612df56c94b40a8

SHA256
ff42e4254c02143eecd9544fb72620ca49b40a0b5830c17099150a97fad9eb5c

SHA512
2ea06eca3d60c7011f44a637a4d097f1165093a1e80d075ed177d6ef4c68320a27ff0db0afbdd110db2adf58312c90f6efef493882d36dedaef8c5a18bb50483

Download Submit
memory/2108-0-0x0000000000860000-0x0000000000A48000-memory.dmp

Filesize
1.9MB

Download
memory/2108-1-0x000007FEF52D0000-0x000007FEF5CBC000-memory.dmp

Filesize
9.9MB

Download
memory/2108-9-0x000007FEF52D0000-0x000007FEF5CBC000-memory.dmp

Filesize
9.9MB

Download
memory/3060-7-0x0000000000A20000-0x0000000000C08000-memory.dmp

Filesize
1.9MB

Download
memory/3060-8-0x000007FEF52D0000-0x000007FEF5CBC000-memory.dmp

Filesize
9.9MB

Download
memory/3060-11-0x0000000000290000-0x0000000000310000-memory.dmp

Filesize
512KB

Download
memory/3060-465-0x000007FEF52D0000-0x000007FEF5CBC000-memory.dmp

Filesize
9.9MB

Download
memory/3060-466-0x0000000000290000-0x0000000000310000-memory.dmp

Filesize
512KB

Download