chaos | 9b353723692ee47483a2d59789f7e337cf34cc0c3603e7d49c103a24d3c211a7

Analysis

max time kernel
122s
max time network
127s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
02-02-2024 20:30

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General

Target

2024-02-02_9f5f28e290f1ac8a04960ab1428bf318_chaos_destroyer_wannacry.exe
Size

24KB
MD5

9f5f28e290f1ac8a04960ab1428bf318
SHA1

bb73fafa58d70f84775d8f67ad3c16ef4705019e
SHA256

9b353723692ee47483a2d59789f7e337cf34cc0c3603e7d49c103a24d3c211a7
SHA512

3eaf097a2358ec19ebab96e4f3f2b21f97d10f7ac169afe10bcc4d61d283aee81d146e33942fee1e9deb5e3b850ac80a502f9ff0b1469d6a019962fd14bf63ab
SSDEEP

384:23MLWHn3kIHWrzdLrJmhjZTBpEF3+nJOr91CrDwcVeb:6n3kI2C1pEF+Or9SUceb

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/2832-0-0x00000000001D0000-0x00000000001DC000-memory.dmp	family_chaos
behavioral1/files/0x000b000000012185-5.dat	family_chaos
behavioral1/memory/2664-7-0x0000000000270000-0x000000000027C000-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/2832-0-0x00000000001D0000-0x00000000001DC000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/files/0x000b000000012185-5.dat	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/memory/2664-7-0x0000000000270000-0x000000000027C000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
836	bcdedit.exe
1256	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
1952	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
2664	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\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\Public\Music\Sample Music\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-3427588347-1492276948-3422228430-1000\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\Documents\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\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\Pictures\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\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\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\Admin\Contacts\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\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\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\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\Accessibility\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\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\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\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\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
2756	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
2016	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2664	svchost.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
2832	2024-02-02_9f5f28e290f1ac8a04960ab1428bf318_chaos_destroyer_wannacry.exe
2832	2024-02-02_9f5f28e290f1ac8a04960ab1428bf318_chaos_destroyer_wannacry.exe
2832	2024-02-02_9f5f28e290f1ac8a04960ab1428bf318_chaos_destroyer_wannacry.exe
2664	svchost.exe
2664	svchost.exe
2664	svchost.exe
2664	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	2832	2024-02-02_9f5f28e290f1ac8a04960ab1428bf318_chaos_destroyer_wannacry.exe
Token: SeDebugPrivilege	2664	svchost.exe
Token: SeBackupPrivilege	948	vssvc.exe
Token: SeRestorePrivilege	948	vssvc.exe
Token: SeAuditPrivilege	948	vssvc.exe
Token: SeIncreaseQuotaPrivilege	2108	WMIC.exe
Token: SeSecurityPrivilege	2108	WMIC.exe
Token: SeTakeOwnershipPrivilege	2108	WMIC.exe
Token: SeLoadDriverPrivilege	2108	WMIC.exe
Token: SeSystemProfilePrivilege	2108	WMIC.exe
Token: SeSystemtimePrivilege	2108	WMIC.exe
Token: SeProfSingleProcessPrivilege	2108	WMIC.exe
Token: SeIncBasePriorityPrivilege	2108	WMIC.exe
Token: SeCreatePagefilePrivilege	2108	WMIC.exe
Token: SeBackupPrivilege	2108	WMIC.exe
Token: SeRestorePrivilege	2108	WMIC.exe
Token: SeShutdownPrivilege	2108	WMIC.exe
Token: SeDebugPrivilege	2108	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2108	WMIC.exe
Token: SeRemoteShutdownPrivilege	2108	WMIC.exe
Token: SeUndockPrivilege	2108	WMIC.exe
Token: SeManageVolumePrivilege	2108	WMIC.exe
Token: 33	2108	WMIC.exe
Token: 34	2108	WMIC.exe
Token: 35	2108	WMIC.exe
Token: SeIncreaseQuotaPrivilege	2108	WMIC.exe
Token: SeSecurityPrivilege	2108	WMIC.exe
Token: SeTakeOwnershipPrivilege	2108	WMIC.exe
Token: SeLoadDriverPrivilege	2108	WMIC.exe
Token: SeSystemProfilePrivilege	2108	WMIC.exe
Token: SeSystemtimePrivilege	2108	WMIC.exe
Token: SeProfSingleProcessPrivilege	2108	WMIC.exe
Token: SeIncBasePriorityPrivilege	2108	WMIC.exe
Token: SeCreatePagefilePrivilege	2108	WMIC.exe
Token: SeBackupPrivilege	2108	WMIC.exe
Token: SeRestorePrivilege	2108	WMIC.exe
Token: SeShutdownPrivilege	2108	WMIC.exe
Token: SeDebugPrivilege	2108	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2108	WMIC.exe
Token: SeRemoteShutdownPrivilege	2108	WMIC.exe
Token: SeUndockPrivilege	2108	WMIC.exe
Token: SeManageVolumePrivilege	2108	WMIC.exe
Token: 33	2108	WMIC.exe
Token: 34	2108	WMIC.exe
Token: 35	2108	WMIC.exe
Token: SeBackupPrivilege	644	wbengine.exe
Token: SeRestorePrivilege	644	wbengine.exe
Token: SeSecurityPrivilege	644	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2832 wrote to memory of 2664	2832	2024-02-02_9f5f28e290f1ac8a04960ab1428bf318_chaos_destroyer_wannacry.exe	28
PID 2832 wrote to memory of 2664	2832	2024-02-02_9f5f28e290f1ac8a04960ab1428bf318_chaos_destroyer_wannacry.exe	28
PID 2832 wrote to memory of 2664	2832	2024-02-02_9f5f28e290f1ac8a04960ab1428bf318_chaos_destroyer_wannacry.exe	28
PID 2664 wrote to memory of 876	2664	svchost.exe	30
PID 2664 wrote to memory of 876	2664	svchost.exe	30
PID 2664 wrote to memory of 876	2664	svchost.exe	30
PID 876 wrote to memory of 2756	876	cmd.exe	32
PID 876 wrote to memory of 2756	876	cmd.exe	32
PID 876 wrote to memory of 2756	876	cmd.exe	32
PID 876 wrote to memory of 2108	876	cmd.exe	35
PID 876 wrote to memory of 2108	876	cmd.exe	35
PID 876 wrote to memory of 2108	876	cmd.exe	35
PID 2664 wrote to memory of 2596	2664	svchost.exe	37
PID 2664 wrote to memory of 2596	2664	svchost.exe	37
PID 2664 wrote to memory of 2596	2664	svchost.exe	37
PID 2596 wrote to memory of 836	2596	cmd.exe	39
PID 2596 wrote to memory of 836	2596	cmd.exe	39
PID 2596 wrote to memory of 836	2596	cmd.exe	39
PID 2596 wrote to memory of 1256	2596	cmd.exe	40
PID 2596 wrote to memory of 1256	2596	cmd.exe	40
PID 2596 wrote to memory of 1256	2596	cmd.exe	40
PID 2664 wrote to memory of 1656	2664	svchost.exe	41
PID 2664 wrote to memory of 1656	2664	svchost.exe	41
PID 2664 wrote to memory of 1656	2664	svchost.exe	41
PID 1656 wrote to memory of 1952	1656	cmd.exe	43
PID 1656 wrote to memory of 1952	1656	cmd.exe	43
PID 1656 wrote to memory of 1952	1656	cmd.exe	43
PID 2664 wrote to memory of 2016	2664	svchost.exe	47
PID 2664 wrote to memory of 2016	2664	svchost.exe	47
PID 2664 wrote to memory of 2016	2664	svchost.exe	47

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\2024-02-02_9f5f28e290f1ac8a04960ab1428bf318_chaos_destroyer_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-02_9f5f28e290f1ac8a04960ab1428bf318_chaos_destroyer_wannacry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2832
- 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:2664
- - 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:876
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:2756
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:2108
- - 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:2596
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:836
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1256
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1656
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:1952
- - 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:2016

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:948

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:644

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:2344

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:2988

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
9f5f28e290f1ac8a04960ab1428bf318

SHA1
bb73fafa58d70f84775d8f67ad3c16ef4705019e

SHA256
9b353723692ee47483a2d59789f7e337cf34cc0c3603e7d49c103a24d3c211a7

SHA512
3eaf097a2358ec19ebab96e4f3f2b21f97d10f7ac169afe10bcc4d61d283aee81d146e33942fee1e9deb5e3b850ac80a502f9ff0b1469d6a019962fd14bf63ab

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

Filesize
1KB

MD5
804dd4f514fbcfe8458982d82e2fef98

SHA1
09638d9784b2bc0051cdb1522963810065f0d1ee

SHA256
5df1eeaf49e20169580fa510ac22eee65bcdaddf04288d4e512b1f11be86cfc0

SHA512
5bd1492a4cd7511649e6f27f71a1b7d79b5e52a9def4c6ae3cbe7ea09e0a9478e79aa51a8897f1ccc5046cf0edd7f909eddbea858e193907632d69ca75d0ed02

Download Submit
memory/2664-7-0x0000000000270000-0x000000000027C000-memory.dmp

Filesize
48KB

Download
memory/2664-9-0x000007FEF56F0000-0x000007FEF60DC000-memory.dmp

Filesize
9.9MB

Download
memory/2664-71-0x0000000000530000-0x00000000005B0000-memory.dmp

Filesize
512KB

Download
memory/2664-72-0x000007FEF56F0000-0x000007FEF60DC000-memory.dmp

Filesize
9.9MB

Download
memory/2664-73-0x0000000000530000-0x00000000005B0000-memory.dmp

Filesize
512KB

Download
memory/2832-0-0x00000000001D0000-0x00000000001DC000-memory.dmp

Filesize
48KB

Download
memory/2832-1-0x000007FEF56F0000-0x000007FEF60DC000-memory.dmp

Filesize
9.9MB

Download
memory/2832-8-0x000007FEF56F0000-0x000007FEF60DC000-memory.dmp

Filesize
9.9MB

Download