chaos | 3c19762ef8551c8f97ebac5fc0b5d37023286c96c3e70a18840bd86fa3800d14

Analysis

max time kernel
119s
max time network
121s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
01-07-2024 18:36

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General

Target

2024-07-01_a6f55eb63c97d4099876dcbe3e2e007a_destroyer_wannacry.exe
Size

39KB
MD5

a6f55eb63c97d4099876dcbe3e2e007a
SHA1

4f554f5bf5381285c5fd9199107ff91aa42798ab
SHA256

3c19762ef8551c8f97ebac5fc0b5d37023286c96c3e70a18840bd86fa3800d14
SHA512

7637b96c1ce28619af005d4d012968953f6d1fc7c81f7444557a33d86e7081c3d0aa9919cb6ae95fcf1febabaf5feae5ca7ad5d002c4901ede9bf93dbc212818
SSDEEP

768:hqo2WM71np65YAHMDr9gzPHSDqfTyPPDdXOyT1/WwrwgceeU:ko2WMKCAHMDr9gzaDNPPDdXb/YgheU

Score

10^/10

chaos defense_evasion evasion execution impact 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/2752-1-0x0000000000E40000-0x0000000000E50000-memory.dmp	family_chaos
behavioral1/files/0x000c00000001269e-5.dat	family_chaos
behavioral1/memory/2880-7-0x0000000000FF0000-0x0000000001000000-memory.dmp	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

Detects command variations typically used by ransomware 3 IoCs

resource	yara_rule
behavioral1/memory/2752-1-0x0000000000E40000-0x0000000000E50000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/files/0x000c00000001269e-5.dat	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/memory/2880-7-0x0000000000FF0000-0x0000000001000000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
1620	bcdedit.exe
1792	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
1616	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\lol.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
2880	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\Public\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\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\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\Videos\Sample Videos\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\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	F:\$RECYCLE.BIN\S-1-5-21-1298544033-3225604241-2703760938-1000\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\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\Contacts\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\Programs\Maintenance\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\Recent\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\Public\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\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\Libraries\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\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\Desktop\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\Desktop\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\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

Sets desktop wallpaper using registry 2 TTPs 1 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\cwyg6mxin.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
3004	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
880	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2880	svchost.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2752	2024-07-01_a6f55eb63c97d4099876dcbe3e2e007a_destroyer_wannacry.exe
2752	2024-07-01_a6f55eb63c97d4099876dcbe3e2e007a_destroyer_wannacry.exe
2880	svchost.exe
2880	svchost.exe
2880	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	2752	2024-07-01_a6f55eb63c97d4099876dcbe3e2e007a_destroyer_wannacry.exe
Token: SeDebugPrivilege	2880	svchost.exe
Token: SeBackupPrivilege	2304	vssvc.exe
Token: SeRestorePrivilege	2304	vssvc.exe
Token: SeAuditPrivilege	2304	vssvc.exe
Token: SeIncreaseQuotaPrivilege	1668	WMIC.exe
Token: SeSecurityPrivilege	1668	WMIC.exe
Token: SeTakeOwnershipPrivilege	1668	WMIC.exe
Token: SeLoadDriverPrivilege	1668	WMIC.exe
Token: SeSystemProfilePrivilege	1668	WMIC.exe
Token: SeSystemtimePrivilege	1668	WMIC.exe
Token: SeProfSingleProcessPrivilege	1668	WMIC.exe
Token: SeIncBasePriorityPrivilege	1668	WMIC.exe
Token: SeCreatePagefilePrivilege	1668	WMIC.exe
Token: SeBackupPrivilege	1668	WMIC.exe
Token: SeRestorePrivilege	1668	WMIC.exe
Token: SeShutdownPrivilege	1668	WMIC.exe
Token: SeDebugPrivilege	1668	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1668	WMIC.exe
Token: SeRemoteShutdownPrivilege	1668	WMIC.exe
Token: SeUndockPrivilege	1668	WMIC.exe
Token: SeManageVolumePrivilege	1668	WMIC.exe
Token: 33	1668	WMIC.exe
Token: 34	1668	WMIC.exe
Token: 35	1668	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1668	WMIC.exe
Token: SeSecurityPrivilege	1668	WMIC.exe
Token: SeTakeOwnershipPrivilege	1668	WMIC.exe
Token: SeLoadDriverPrivilege	1668	WMIC.exe
Token: SeSystemProfilePrivilege	1668	WMIC.exe
Token: SeSystemtimePrivilege	1668	WMIC.exe
Token: SeProfSingleProcessPrivilege	1668	WMIC.exe
Token: SeIncBasePriorityPrivilege	1668	WMIC.exe
Token: SeCreatePagefilePrivilege	1668	WMIC.exe
Token: SeBackupPrivilege	1668	WMIC.exe
Token: SeRestorePrivilege	1668	WMIC.exe
Token: SeShutdownPrivilege	1668	WMIC.exe
Token: SeDebugPrivilege	1668	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1668	WMIC.exe
Token: SeRemoteShutdownPrivilege	1668	WMIC.exe
Token: SeUndockPrivilege	1668	WMIC.exe
Token: SeManageVolumePrivilege	1668	WMIC.exe
Token: 33	1668	WMIC.exe
Token: 34	1668	WMIC.exe
Token: 35	1668	WMIC.exe
Token: SeBackupPrivilege	1772	wbengine.exe
Token: SeRestorePrivilege	1772	wbengine.exe
Token: SeSecurityPrivilege	1772	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2752 wrote to memory of 2880	2752	2024-07-01_a6f55eb63c97d4099876dcbe3e2e007a_destroyer_wannacry.exe	28
PID 2752 wrote to memory of 2880	2752	2024-07-01_a6f55eb63c97d4099876dcbe3e2e007a_destroyer_wannacry.exe	28
PID 2752 wrote to memory of 2880	2752	2024-07-01_a6f55eb63c97d4099876dcbe3e2e007a_destroyer_wannacry.exe	28
PID 2880 wrote to memory of 2500	2880	svchost.exe	30
PID 2880 wrote to memory of 2500	2880	svchost.exe	30
PID 2880 wrote to memory of 2500	2880	svchost.exe	30
PID 2500 wrote to memory of 3004	2500	cmd.exe	32
PID 2500 wrote to memory of 3004	2500	cmd.exe	32
PID 2500 wrote to memory of 3004	2500	cmd.exe	32
PID 2500 wrote to memory of 1668	2500	cmd.exe	35
PID 2500 wrote to memory of 1668	2500	cmd.exe	35
PID 2500 wrote to memory of 1668	2500	cmd.exe	35
PID 2880 wrote to memory of 2680	2880	svchost.exe	37
PID 2880 wrote to memory of 2680	2880	svchost.exe	37
PID 2880 wrote to memory of 2680	2880	svchost.exe	37
PID 2680 wrote to memory of 1620	2680	cmd.exe	39
PID 2680 wrote to memory of 1620	2680	cmd.exe	39
PID 2680 wrote to memory of 1620	2680	cmd.exe	39
PID 2680 wrote to memory of 1792	2680	cmd.exe	40
PID 2680 wrote to memory of 1792	2680	cmd.exe	40
PID 2680 wrote to memory of 1792	2680	cmd.exe	40
PID 2880 wrote to memory of 1704	2880	svchost.exe	41
PID 2880 wrote to memory of 1704	2880	svchost.exe	41
PID 2880 wrote to memory of 1704	2880	svchost.exe	41
PID 1704 wrote to memory of 1616	1704	cmd.exe	43
PID 1704 wrote to memory of 1616	1704	cmd.exe	43
PID 1704 wrote to memory of 1616	1704	cmd.exe	43
PID 2880 wrote to memory of 880	2880	svchost.exe	47
PID 2880 wrote to memory of 880	2880	svchost.exe	47
PID 2880 wrote to memory of 880	2880	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\2024-07-01_a6f55eb63c97d4099876dcbe3e2e007a_destroyer_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-07-01_a6f55eb63c97d4099876dcbe3e2e007a_destroyer_wannacry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2752
- 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:2880
- - 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:2500
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:3004
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:1668
- - 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:2680
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1620
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1792
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1704
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:1616
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\lol.txt
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:880

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2304

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1772

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:3028

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:2340

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

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
39KB

MD5
a6f55eb63c97d4099876dcbe3e2e007a

SHA1
4f554f5bf5381285c5fd9199107ff91aa42798ab

SHA256
3c19762ef8551c8f97ebac5fc0b5d37023286c96c3e70a18840bd86fa3800d14

SHA512
7637b96c1ce28619af005d4d012968953f6d1fc7c81f7444557a33d86e7081c3d0aa9919cb6ae95fcf1febabaf5feae5ca7ad5d002c4901ede9bf93dbc212818

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

Filesize
55B

MD5
d49031810fc87f72297762dd70e14a66

SHA1
1eea7d9acfcd5c1ffc4fb68413424a87ec7756de

SHA256
b6481a1305eb2633d7a73e81b20eaf4184eb614632c5780e5517531804cc54e3

SHA512
e24ac495ce8cd4c05dc6a50d799abc7c2911ce50b54cee7e49831f7fa8454aa3f79ddd404cc3623b5340802abb57dda7451059b8ad3d2989d3746a7195932a5b

Download Submit
memory/2752-0-0x000007FEF5713000-0x000007FEF5714000-memory.dmp

Filesize
4KB

Download
memory/2752-1-0x0000000000E40000-0x0000000000E50000-memory.dmp

Filesize
64KB

Download
memory/2880-7-0x0000000000FF0000-0x0000000001000000-memory.dmp

Filesize
64KB

Download
memory/2880-12-0x000007FEF5710000-0x000007FEF60FC000-memory.dmp

Filesize
9.9MB

Download
memory/2880-18-0x000007FEF5710000-0x000007FEF60FC000-memory.dmp

Filesize
9.9MB

Download
memory/2880-442-0x000007FEF5710000-0x000007FEF60FC000-memory.dmp

Filesize
9.9MB

Download