chaos | b9cd15b5f4112728466f2c11d595711d0953da0d26408b57f42d1215cf60b1b1

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
22-11-2024 19:31

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General

Target

SkynetLocker.exe
Size

329KB
MD5

75a95bd340c43bf016117c1013631c42
SHA1

90a88828b3ed3c25bd91e20b67012f54e221ade6
SHA256

b9cd15b5f4112728466f2c11d595711d0953da0d26408b57f42d1215cf60b1b1
SHA512

41b4356df8be11a8a395918a8871f466c3b7e67ab1eaae1c40cfc374085302ca8693c463e8c24c143c362edde4c43442ddc52ae4ec96a4b4ad294caea17fcb62
SSDEEP

6144:7cVbL0hiIOb8+LDCvzCnQHw67feMv8KiPuTL94:7cVJIOA+vCvnJ8tPuF4

Score

10^/10

chaos defense_evasion evasion execution impact persistence ransomware spyware stealer

Malware Config

Extracted

Path

C:\ProgramData\Microsoft\Device Stage\Device\{113527a4-45d4-4b6f-b567-97838f1b04b0}\SkynetData.txt

Ransom Note

------------------------ ALL YOUR FILES ARE ENCRYPTED ------------------------ Don't worry, you can return all your files! All your files documents, photos, databases and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees do we give to you? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information Don't try to use third-party decrypt tools because it will destroy your files. Discount 50% available if you contact us first 24 hours. To get this software you need write on our e-mail: [email protected]

Emails

[email protected]

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 3 IoCs

resource	yara_rule
behavioral1/memory/2376-7-0x0000000000F30000-0x0000000000F88000-memory.dmp	family_chaos
behavioral1/files/0x0007000000012117-6.dat	family_chaos
behavioral1/memory/2148-1-0x0000000001360000-0x00000000013B8000-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
1104	bcdedit.exe
548	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
1528	wbadmin.exe

Disables Task Manager via registry modification
evasion

Executes dropped EXE 1 IoCs

pid	Process
2376	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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Windows\CurrentVersion\Run\UpdateTask = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe"	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
2892	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
1552	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 2 IoCs

pid	Process
2148	SkynetLocker.exe
2376	svchost.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2148	SkynetLocker.exe
2148	SkynetLocker.exe
2148	SkynetLocker.exe
2376	svchost.exe
2376	svchost.exe
2376	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	2148	SkynetLocker.exe
Token: SeDebugPrivilege	2376	svchost.exe
Token: SeBackupPrivilege	3036	vssvc.exe
Token: SeRestorePrivilege	3036	vssvc.exe
Token: SeAuditPrivilege	3036	vssvc.exe
Token: SeIncreaseQuotaPrivilege	2664	WMIC.exe
Token: SeSecurityPrivilege	2664	WMIC.exe
Token: SeTakeOwnershipPrivilege	2664	WMIC.exe
Token: SeLoadDriverPrivilege	2664	WMIC.exe
Token: SeSystemProfilePrivilege	2664	WMIC.exe
Token: SeSystemtimePrivilege	2664	WMIC.exe
Token: SeProfSingleProcessPrivilege	2664	WMIC.exe
Token: SeIncBasePriorityPrivilege	2664	WMIC.exe
Token: SeCreatePagefilePrivilege	2664	WMIC.exe
Token: SeBackupPrivilege	2664	WMIC.exe
Token: SeRestorePrivilege	2664	WMIC.exe
Token: SeShutdownPrivilege	2664	WMIC.exe
Token: SeDebugPrivilege	2664	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2664	WMIC.exe
Token: SeRemoteShutdownPrivilege	2664	WMIC.exe
Token: SeUndockPrivilege	2664	WMIC.exe
Token: SeManageVolumePrivilege	2664	WMIC.exe
Token: 33	2664	WMIC.exe
Token: 34	2664	WMIC.exe
Token: 35	2664	WMIC.exe
Token: SeIncreaseQuotaPrivilege	2664	WMIC.exe
Token: SeSecurityPrivilege	2664	WMIC.exe
Token: SeTakeOwnershipPrivilege	2664	WMIC.exe
Token: SeLoadDriverPrivilege	2664	WMIC.exe
Token: SeSystemProfilePrivilege	2664	WMIC.exe
Token: SeSystemtimePrivilege	2664	WMIC.exe
Token: SeProfSingleProcessPrivilege	2664	WMIC.exe
Token: SeIncBasePriorityPrivilege	2664	WMIC.exe
Token: SeCreatePagefilePrivilege	2664	WMIC.exe
Token: SeBackupPrivilege	2664	WMIC.exe
Token: SeRestorePrivilege	2664	WMIC.exe
Token: SeShutdownPrivilege	2664	WMIC.exe
Token: SeDebugPrivilege	2664	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2664	WMIC.exe
Token: SeRemoteShutdownPrivilege	2664	WMIC.exe
Token: SeUndockPrivilege	2664	WMIC.exe
Token: SeManageVolumePrivilege	2664	WMIC.exe
Token: 33	2664	WMIC.exe
Token: 34	2664	WMIC.exe
Token: 35	2664	WMIC.exe
Token: SeBackupPrivilege	1884	wbengine.exe
Token: SeRestorePrivilege	1884	wbengine.exe
Token: SeSecurityPrivilege	1884	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2148 wrote to memory of 2376	2148	SkynetLocker.exe	30
PID 2148 wrote to memory of 2376	2148	SkynetLocker.exe	30
PID 2148 wrote to memory of 2376	2148	SkynetLocker.exe	30
PID 2376 wrote to memory of 2764	2376	svchost.exe	31
PID 2376 wrote to memory of 2764	2376	svchost.exe	31
PID 2376 wrote to memory of 2764	2376	svchost.exe	31
PID 2764 wrote to memory of 2892	2764	cmd.exe	33
PID 2764 wrote to memory of 2892	2764	cmd.exe	33
PID 2764 wrote to memory of 2892	2764	cmd.exe	33
PID 2764 wrote to memory of 2664	2764	cmd.exe	37
PID 2764 wrote to memory of 2664	2764	cmd.exe	37
PID 2764 wrote to memory of 2664	2764	cmd.exe	37
PID 2376 wrote to memory of 1520	2376	svchost.exe	39
PID 2376 wrote to memory of 1520	2376	svchost.exe	39
PID 2376 wrote to memory of 1520	2376	svchost.exe	39
PID 1520 wrote to memory of 1104	1520	cmd.exe	41
PID 1520 wrote to memory of 1104	1520	cmd.exe	41
PID 1520 wrote to memory of 1104	1520	cmd.exe	41
PID 1520 wrote to memory of 548	1520	cmd.exe	42
PID 1520 wrote to memory of 548	1520	cmd.exe	42
PID 1520 wrote to memory of 548	1520	cmd.exe	42
PID 2376 wrote to memory of 1732	2376	svchost.exe	43
PID 2376 wrote to memory of 1732	2376	svchost.exe	43
PID 2376 wrote to memory of 1732	2376	svchost.exe	43
PID 1732 wrote to memory of 1528	1732	cmd.exe	45
PID 1732 wrote to memory of 1528	1732	cmd.exe	45
PID 1732 wrote to memory of 1528	1732	cmd.exe	45
PID 2376 wrote to memory of 1552	2376	svchost.exe	50
PID 2376 wrote to memory of 1552	2376	svchost.exe	50
PID 2376 wrote to memory of 1552	2376	svchost.exe	50

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\SkynetLocker.exe
"C:\Users\Admin\AppData\Local\Temp\SkynetLocker.exe"
1⤵
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2148
- C:\Users\Admin\AppData\Roaming\svchost.exe
  "C:\Users\Admin\AppData\Roaming\svchost.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2376
- - 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:2764
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:2892
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:2664
- - 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:1520
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1104
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:548
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1732
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:1528
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\SkynetData.txt
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:1552

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

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1884

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:1992

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:1964

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Windows Management Instrumentation

T1047

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

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

Inhibit System Recovery

T1490

Replay Monitor

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Downloads

C:\ProgramData\Microsoft\Device Stage\Device\{113527a4-45d4-4b6f-b567-97838f1b04b0}\SkynetData.txt

Filesize
809B

MD5
ca069420f1d43dabba1630a2477891c7

SHA1
ec68214b8909fe0098b91a68aa01fb269c5a147a

SHA256
6763e8a512a14afefd3bba63ef0516dbb378436e2bc7d853eaeb7a6fdf5eb090

SHA512
2054aa509f5f839677d654529a76ef84e05c5b34a81037c65ce14fba527c01516643b4b97ada26869197f6c8d63270b24fe7392263bbd705f0ef95c9ca498336

Download Submit
C:\Users\Admin\AppData\Roaming\svchost.exe

Filesize
329KB

MD5
75a95bd340c43bf016117c1013631c42

SHA1
90a88828b3ed3c25bd91e20b67012f54e221ade6

SHA256
b9cd15b5f4112728466f2c11d595711d0953da0d26408b57f42d1215cf60b1b1

SHA512
41b4356df8be11a8a395918a8871f466c3b7e67ab1eaae1c40cfc374085302ca8693c463e8c24c143c362edde4c43442ddc52ae4ec96a4b4ad294caea17fcb62

Download Submit
C:\Users\Admin\Desktop\SuspendSearch.tiff

Filesize
1B

MD5
d1457b72c3fb323a2671125aef3eab5d

SHA1
5bab61eb53176449e25c2c82f172b82cb13ffb9d

SHA256
8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

SHA512
ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

Download Submit
memory/2148-10-0x000007FEF57A0000-0x000007FEF618C000-memory.dmp

Filesize
9.9MB

Download
memory/2148-8-0x000007FEF57A0000-0x000007FEF618C000-memory.dmp

Filesize
9.9MB

Download
memory/2148-1-0x0000000001360000-0x00000000013B8000-memory.dmp

Filesize
352KB

Download
memory/2148-0-0x000007FEF57A3000-0x000007FEF57A4000-memory.dmp

Filesize
4KB

Download
memory/2376-11-0x000007FEF57A0000-0x000007FEF618C000-memory.dmp

Filesize
9.9MB

Download
memory/2376-9-0x000007FEF57A0000-0x000007FEF618C000-memory.dmp

Filesize
9.9MB

Download
memory/2376-7-0x0000000000F30000-0x0000000000F88000-memory.dmp

Filesize
352KB

Download
memory/2376-708-0x000007FEF57A0000-0x000007FEF618C000-memory.dmp

Filesize
9.9MB

Download