chaos | b2f188b9e27d4a877e506457667a97c39f6805a597fceb1dc729e6a3f2cf6639

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
27-11-2024 09:27

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General

Target

2024-11-27_3bcb06bfd037d20132b11c49f21940e5_wannacry.exe
Size

103KB
MD5

3bcb06bfd037d20132b11c49f21940e5
SHA1

90b36f6a8da347ec2629675cf07698329d286570
SHA256

b2f188b9e27d4a877e506457667a97c39f6805a597fceb1dc729e6a3f2cf6639
SHA512

ad540e1f66dc86a8cb2906ec042f266c39e7264935a42a11da08a17e765e1e93b7867e1b7339e8508bfd6ce41468fad65598c149bf19f7de20163e93c71ad277
SSDEEP

3072:ZoXTtyjXr9H7490Ra2icHUkPuo0vDfiO9qWQ/KTZgKbt8:d7r9b44a2BUZoKf/Ngeu+t

Score

10^/10

chaos wannacry defense_evasion evasion execution impact ransomware spyware stealer worm

Malware Config

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 3 IoCs

resource	yara_rule
behavioral1/memory/2748-1-0x0000000001220000-0x0000000001240000-memory.dmp	family_chaos
behavioral1/files/0x00080000000120ff-4.dat	family_chaos
behavioral1/memory/2804-7-0x0000000000320000-0x0000000000340000-memory.dmp	family_chaos

Chaos family
chaos
Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Wannacry family
wannacry
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
2468	bcdedit.exe
2576	bcdedit.exe

Renames multiple (190) 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
704	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_this!.exe	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2804	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\Links\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\Videos\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\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\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Saved Games\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\Searches\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\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\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\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\Windows\Start Menu\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\Maintenance\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\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\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\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\AppData\Roaming\Microsoft\Windows\Libraries\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\Pictures\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\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\Public\Music\Sample Music\desktop.ini	svchost.exe

Sets desktop wallpaper using registry 2 TTPs 2 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\\jokvu0xbx.jpg"	svchost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\Pictures\\My Wallpaper.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
2820	vssadmin.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2804	svchost.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
2748	2024-11-27_3bcb06bfd037d20132b11c49f21940e5_wannacry.exe
2748	2024-11-27_3bcb06bfd037d20132b11c49f21940e5_wannacry.exe
2748	2024-11-27_3bcb06bfd037d20132b11c49f21940e5_wannacry.exe
2804	svchost.exe
2804	svchost.exe
2804	svchost.exe
2804	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	2748	2024-11-27_3bcb06bfd037d20132b11c49f21940e5_wannacry.exe
Token: SeDebugPrivilege	2804	svchost.exe
Token: SeBackupPrivilege	1976	vssvc.exe
Token: SeRestorePrivilege	1976	vssvc.exe
Token: SeAuditPrivilege	1976	vssvc.exe
Token: SeIncreaseQuotaPrivilege	2116	WMIC.exe
Token: SeSecurityPrivilege	2116	WMIC.exe
Token: SeTakeOwnershipPrivilege	2116	WMIC.exe
Token: SeLoadDriverPrivilege	2116	WMIC.exe
Token: SeSystemProfilePrivilege	2116	WMIC.exe
Token: SeSystemtimePrivilege	2116	WMIC.exe
Token: SeProfSingleProcessPrivilege	2116	WMIC.exe
Token: SeIncBasePriorityPrivilege	2116	WMIC.exe
Token: SeCreatePagefilePrivilege	2116	WMIC.exe
Token: SeBackupPrivilege	2116	WMIC.exe
Token: SeRestorePrivilege	2116	WMIC.exe
Token: SeShutdownPrivilege	2116	WMIC.exe
Token: SeDebugPrivilege	2116	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2116	WMIC.exe
Token: SeRemoteShutdownPrivilege	2116	WMIC.exe
Token: SeUndockPrivilege	2116	WMIC.exe
Token: SeManageVolumePrivilege	2116	WMIC.exe
Token: 33	2116	WMIC.exe
Token: 34	2116	WMIC.exe
Token: 35	2116	WMIC.exe
Token: SeIncreaseQuotaPrivilege	2116	WMIC.exe
Token: SeSecurityPrivilege	2116	WMIC.exe
Token: SeTakeOwnershipPrivilege	2116	WMIC.exe
Token: SeLoadDriverPrivilege	2116	WMIC.exe
Token: SeSystemProfilePrivilege	2116	WMIC.exe
Token: SeSystemtimePrivilege	2116	WMIC.exe
Token: SeProfSingleProcessPrivilege	2116	WMIC.exe
Token: SeIncBasePriorityPrivilege	2116	WMIC.exe
Token: SeCreatePagefilePrivilege	2116	WMIC.exe
Token: SeBackupPrivilege	2116	WMIC.exe
Token: SeRestorePrivilege	2116	WMIC.exe
Token: SeShutdownPrivilege	2116	WMIC.exe
Token: SeDebugPrivilege	2116	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2116	WMIC.exe
Token: SeRemoteShutdownPrivilege	2116	WMIC.exe
Token: SeUndockPrivilege	2116	WMIC.exe
Token: SeManageVolumePrivilege	2116	WMIC.exe
Token: 33	2116	WMIC.exe
Token: 34	2116	WMIC.exe
Token: 35	2116	WMIC.exe
Token: SeBackupPrivilege	1588	wbengine.exe
Token: SeRestorePrivilege	1588	wbengine.exe
Token: SeSecurityPrivilege	1588	wbengine.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 2748 wrote to memory of 2804	2748	2024-11-27_3bcb06bfd037d20132b11c49f21940e5_wannacry.exe	30
PID 2748 wrote to memory of 2804	2748	2024-11-27_3bcb06bfd037d20132b11c49f21940e5_wannacry.exe	30
PID 2748 wrote to memory of 2804	2748	2024-11-27_3bcb06bfd037d20132b11c49f21940e5_wannacry.exe	30
PID 2804 wrote to memory of 3056	2804	svchost.exe	32
PID 2804 wrote to memory of 3056	2804	svchost.exe	32
PID 2804 wrote to memory of 3056	2804	svchost.exe	32
PID 3056 wrote to memory of 2820	3056	cmd.exe	34
PID 3056 wrote to memory of 2820	3056	cmd.exe	34
PID 3056 wrote to memory of 2820	3056	cmd.exe	34
PID 3056 wrote to memory of 2116	3056	cmd.exe	37
PID 3056 wrote to memory of 2116	3056	cmd.exe	37
PID 3056 wrote to memory of 2116	3056	cmd.exe	37
PID 2804 wrote to memory of 2340	2804	svchost.exe	39
PID 2804 wrote to memory of 2340	2804	svchost.exe	39
PID 2804 wrote to memory of 2340	2804	svchost.exe	39
PID 2340 wrote to memory of 2468	2340	cmd.exe	41
PID 2340 wrote to memory of 2468	2340	cmd.exe	41
PID 2340 wrote to memory of 2468	2340	cmd.exe	41
PID 2340 wrote to memory of 2576	2340	cmd.exe	42
PID 2340 wrote to memory of 2576	2340	cmd.exe	42
PID 2340 wrote to memory of 2576	2340	cmd.exe	42
PID 2804 wrote to memory of 1940	2804	svchost.exe	43
PID 2804 wrote to memory of 1940	2804	svchost.exe	43
PID 2804 wrote to memory of 1940	2804	svchost.exe	43
PID 1940 wrote to memory of 704	1940	cmd.exe	45
PID 1940 wrote to memory of 704	1940	cmd.exe	45
PID 1940 wrote to memory of 704	1940	cmd.exe	45

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\2024-11-27_3bcb06bfd037d20132b11c49f21940e5_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-11-27_3bcb06bfd037d20132b11c49f21940e5_wannacry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2748
- 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:2804
- - 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:3056
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:2820
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:2116
- - 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:2340
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2468
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2576
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1940
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:704

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1976

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1588

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:996

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:1144

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
103KB

MD5
3bcb06bfd037d20132b11c49f21940e5

SHA1
90b36f6a8da347ec2629675cf07698329d286570

SHA256
b2f188b9e27d4a877e506457667a97c39f6805a597fceb1dc729e6a3f2cf6639

SHA512
ad540e1f66dc86a8cb2906ec042f266c39e7264935a42a11da08a17e765e1e93b7867e1b7339e8508bfd6ce41468fad65598c149bf19f7de20163e93c71ad277

Download Submit
C:\Users\Admin\Documents\¡read_this!.exe

Filesize
967B

MD5
d6a500f15c88649bfc51113f7bf656e9

SHA1
8d5ac46da895f1250b3bf784a772b0d8b042e50e

SHA256
33afcb9c16172963cad44a6d45a8604bfddbeb669d2811a5be14f68c87db237e

SHA512
bb26e0fba4ec1388b36991ff3f0acce41658ccc6c717c74bd6430126ce4ee191afe08f677357bde1815a7e79143640dabc6ca12949967f9051a3eb4d539f96f5

Download Submit
memory/2748-0-0x000007FEF5233000-0x000007FEF5234000-memory.dmp

Filesize
4KB

Download
memory/2748-1-0x0000000001220000-0x0000000001240000-memory.dmp

Filesize
128KB

Download
memory/2804-7-0x0000000000320000-0x0000000000340000-memory.dmp

Filesize
128KB

Download
memory/2804-17-0x000007FEF5230000-0x000007FEF5C1C000-memory.dmp

Filesize
9.9MB

Download
memory/2804-30-0x000007FEF5230000-0x000007FEF5C1C000-memory.dmp

Filesize
9.9MB

Download
memory/2804-447-0x000007FEF5230000-0x000007FEF5C1C000-memory.dmp

Filesize
9.9MB

Download