chaos | aec0d451d6ca843979b2bbdfe0aec122e732e70f40ef590fb4563d8452ac82f5

Analysis

max time kernel
119s
max time network
122s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
03-02-2024 01:31

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General

Target

2024-02-03_dc9e50c14925c72ae3c5293bf45e7fc3_chaos_destroyer_wannacry.exe
Size

24KB
MD5

dc9e50c14925c72ae3c5293bf45e7fc3
SHA1

f05a6a8390a2f4c96cc5f1aa47ffc9e4dafce500
SHA256

aec0d451d6ca843979b2bbdfe0aec122e732e70f40ef590fb4563d8452ac82f5
SHA512

e0cd1f125b3307c0a3faa4d22547740126b99fc47650be0584b9f5cd24b53ad5b7c759f23e2450add23797b6653cc21fa3dbc70f552ff484ac7787acef24b8f5
SSDEEP

384:u3Mg/bqo2dbEyyEvbfEbMbp7DKB+98sJAr91CwDwbueP:Mqo2/jEOp7DWNkAr9nUaeP

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/2928-0-0x0000000000FE0000-0x0000000000FEC000-memory.dmp	family_chaos
behavioral1/files/0x000a000000012243-5.dat	family_chaos
behavioral1/memory/2080-7-0x0000000001390000-0x000000000139C000-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/2928-0-0x0000000000FE0000-0x0000000000FEC000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/files/0x000a000000012243-5.dat	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/memory/2080-7-0x0000000001390000-0x000000000139C000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
2572	bcdedit.exe
1744	bcdedit.exe

Renames multiple (192) 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
2972	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\OPEN_THIS.txt	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2080	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\Accessibility\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\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\Pictures\Sample Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\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\User Pinned\TaskBar\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\Accessories\System Tools\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\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\SendTo\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\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\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	F:\$RECYCLE.BIN\S-1-5-21-928733405-3780110381-2966456290-1000\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\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\Saved Games\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\Libraries\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\Documents\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\Searches\desktop.ini	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
2600	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
1888	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2080	svchost.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
2928	2024-02-03_dc9e50c14925c72ae3c5293bf45e7fc3_chaos_destroyer_wannacry.exe
2928	2024-02-03_dc9e50c14925c72ae3c5293bf45e7fc3_chaos_destroyer_wannacry.exe
2928	2024-02-03_dc9e50c14925c72ae3c5293bf45e7fc3_chaos_destroyer_wannacry.exe
2080	svchost.exe
2080	svchost.exe
2080	svchost.exe
2080	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	2928	2024-02-03_dc9e50c14925c72ae3c5293bf45e7fc3_chaos_destroyer_wannacry.exe
Token: SeDebugPrivilege	2080	svchost.exe
Token: SeBackupPrivilege	1252	vssvc.exe
Token: SeRestorePrivilege	1252	vssvc.exe
Token: SeAuditPrivilege	1252	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	2964	wbengine.exe
Token: SeRestorePrivilege	2964	wbengine.exe
Token: SeSecurityPrivilege	2964	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2928 wrote to memory of 2080	2928	2024-02-03_dc9e50c14925c72ae3c5293bf45e7fc3_chaos_destroyer_wannacry.exe	28
PID 2928 wrote to memory of 2080	2928	2024-02-03_dc9e50c14925c72ae3c5293bf45e7fc3_chaos_destroyer_wannacry.exe	28
PID 2928 wrote to memory of 2080	2928	2024-02-03_dc9e50c14925c72ae3c5293bf45e7fc3_chaos_destroyer_wannacry.exe	28
PID 2080 wrote to memory of 2012	2080	svchost.exe	30
PID 2080 wrote to memory of 2012	2080	svchost.exe	30
PID 2080 wrote to memory of 2012	2080	svchost.exe	30
PID 2012 wrote to memory of 2600	2012	cmd.exe	32
PID 2012 wrote to memory of 2600	2012	cmd.exe	32
PID 2012 wrote to memory of 2600	2012	cmd.exe	32
PID 2012 wrote to memory of 1276	2012	cmd.exe	36
PID 2012 wrote to memory of 1276	2012	cmd.exe	36
PID 2012 wrote to memory of 1276	2012	cmd.exe	36
PID 2080 wrote to memory of 1496	2080	svchost.exe	38
PID 2080 wrote to memory of 1496	2080	svchost.exe	38
PID 2080 wrote to memory of 1496	2080	svchost.exe	38
PID 1496 wrote to memory of 2572	1496	cmd.exe	40
PID 1496 wrote to memory of 2572	1496	cmd.exe	40
PID 1496 wrote to memory of 2572	1496	cmd.exe	40
PID 1496 wrote to memory of 1744	1496	cmd.exe	41
PID 1496 wrote to memory of 1744	1496	cmd.exe	41
PID 1496 wrote to memory of 1744	1496	cmd.exe	41
PID 2080 wrote to memory of 2372	2080	svchost.exe	42
PID 2080 wrote to memory of 2372	2080	svchost.exe	42
PID 2080 wrote to memory of 2372	2080	svchost.exe	42
PID 2372 wrote to memory of 2972	2372	cmd.exe	44
PID 2372 wrote to memory of 2972	2372	cmd.exe	44
PID 2372 wrote to memory of 2972	2372	cmd.exe	44
PID 2080 wrote to memory of 1888	2080	svchost.exe	48
PID 2080 wrote to memory of 1888	2080	svchost.exe	48
PID 2080 wrote to memory of 1888	2080	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\2024-02-03_dc9e50c14925c72ae3c5293bf45e7fc3_chaos_destroyer_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-03_dc9e50c14925c72ae3c5293bf45e7fc3_chaos_destroyer_wannacry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2928
- 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)
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2080
- - 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:2012
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:2600
  - - 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:1496
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2572
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1744
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2372
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:2972
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\OPEN_THIS.txt
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:1888

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1252

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2964

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:2176

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:576

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

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

Inhibit System Recovery

T1490

Replay Monitor

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Downloads

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

Filesize
24KB

MD5
dc9e50c14925c72ae3c5293bf45e7fc3

SHA1
f05a6a8390a2f4c96cc5f1aa47ffc9e4dafce500

SHA256
aec0d451d6ca843979b2bbdfe0aec122e732e70f40ef590fb4563d8452ac82f5

SHA512
e0cd1f125b3307c0a3faa4d22547740126b99fc47650be0584b9f5cd24b53ad5b7c759f23e2450add23797b6653cc21fa3dbc70f552ff484ac7787acef24b8f5

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

Filesize
1KB

MD5
ba45f3db1eec79edfdcb1683dc1fcd1c

SHA1
49d150a6ffa6171ecf2427d700bbed732ce5ca9d

SHA256
ed4c8a2dcc8a8b101538b45558b4f56a4a4e3e07235e6f6a232b85118ee16551

SHA512
0384b11746073e511c33bab53a036f12315f132089dd8204e416905d6251d53c4a656ec9b66913dfaa14b203b5c19ae7f1a272352fc30dde91eb9132de52d9a4

Download Submit
memory/2080-7-0x0000000001390000-0x000000000139C000-memory.dmp

Filesize
48KB

Download
memory/2080-9-0x000007FEF5D80000-0x000007FEF676C000-memory.dmp

Filesize
9.9MB

Download
memory/2080-11-0x000000001AE40000-0x000000001AEC0000-memory.dmp

Filesize
512KB

Download
memory/2080-447-0x000007FEF5D80000-0x000007FEF676C000-memory.dmp

Filesize
9.9MB

Download
memory/2080-448-0x000000001AE40000-0x000000001AEC0000-memory.dmp

Filesize
512KB

Download
memory/2928-0-0x0000000000FE0000-0x0000000000FEC000-memory.dmp

Filesize
48KB

Download
memory/2928-1-0x000007FEF5D80000-0x000007FEF676C000-memory.dmp

Filesize
9.9MB

Download
memory/2928-8-0x000007FEF5D80000-0x000007FEF676C000-memory.dmp

Filesize
9.9MB

Download