chaos | e1319577144e33e76755ce24657a28b4bbbe2809fb2917590cc786f1b1293394

Analysis

max time kernel
121s
max time network
124s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
17-05-2024 17:26

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General

Target

2024-05-17_5a493651ebb3bfd33efff93951a1c39e_destroyer_wannacry.exe
Size

43KB
MD5

5a493651ebb3bfd33efff93951a1c39e
SHA1

e3a5f99912ecae3059d4aaf0a337773a8c591d3c
SHA256

e1319577144e33e76755ce24657a28b4bbbe2809fb2917590cc786f1b1293394
SHA512

0adab6a1a1583dc1f05da8fe5e178e3ca4d569865a94776e281d6e2751645e2275a8f91551bc13f24f3c0a09b577b682e1f5026837e271ebdbe39f18c93bd69c
SSDEEP

768:qqo2ypUFA4+kR7Fr9NQAkrJHzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz9:xo2h6417Fr9NQAkrJHzzzzzzzzzzzzz9

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/1192-1-0x0000000000330000-0x0000000000342000-memory.dmp	family_chaos
behavioral1/files/0x000d00000000f845-5.dat	family_chaos
behavioral1/memory/2920-7-0x0000000000E20000-0x0000000000E32000-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/1192-1-0x0000000000330000-0x0000000000342000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/files/0x000d00000000f845-5.dat	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/memory/2920-7-0x0000000000E20000-0x0000000000E32000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
1892	bcdedit.exe
1696	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
2140	wbadmin.exe

Drops startup file 3 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\winlogon.url	winlogon.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini	winlogon.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bot.txt	winlogon.exe

Executes dropped EXE 1 IoCs

pid	Process
2920	winlogon.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\Contacts\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\Searches\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Public\Music\Sample Music\desktop.ini	winlogon.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-3691908287-3775019229-3534252667-1000\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\Videos\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini	winlogon.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Public\Pictures\Sample Pictures\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\Favorites\Links for United States\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini	winlogon.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\desktop.ini	winlogon.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-1-5-21-3691908287-3775019229-3534252667-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\z1pvfiukq.jpg"	winlogon.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3691908287-3775019229-3534252667-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\Pictures\\My Wallpaper.jpg"	winlogon.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
1692	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
696	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2920	winlogon.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
1192	2024-05-17_5a493651ebb3bfd33efff93951a1c39e_destroyer_wannacry.exe
1192	2024-05-17_5a493651ebb3bfd33efff93951a1c39e_destroyer_wannacry.exe
2920	winlogon.exe
2920	winlogon.exe
2920	winlogon.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	1192	2024-05-17_5a493651ebb3bfd33efff93951a1c39e_destroyer_wannacry.exe
Token: SeDebugPrivilege	2920	winlogon.exe
Token: SeBackupPrivilege	2408	vssvc.exe
Token: SeRestorePrivilege	2408	vssvc.exe
Token: SeAuditPrivilege	2408	vssvc.exe
Token: SeIncreaseQuotaPrivilege	1196	WMIC.exe
Token: SeSecurityPrivilege	1196	WMIC.exe
Token: SeTakeOwnershipPrivilege	1196	WMIC.exe
Token: SeLoadDriverPrivilege	1196	WMIC.exe
Token: SeSystemProfilePrivilege	1196	WMIC.exe
Token: SeSystemtimePrivilege	1196	WMIC.exe
Token: SeProfSingleProcessPrivilege	1196	WMIC.exe
Token: SeIncBasePriorityPrivilege	1196	WMIC.exe
Token: SeCreatePagefilePrivilege	1196	WMIC.exe
Token: SeBackupPrivilege	1196	WMIC.exe
Token: SeRestorePrivilege	1196	WMIC.exe
Token: SeShutdownPrivilege	1196	WMIC.exe
Token: SeDebugPrivilege	1196	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1196	WMIC.exe
Token: SeRemoteShutdownPrivilege	1196	WMIC.exe
Token: SeUndockPrivilege	1196	WMIC.exe
Token: SeManageVolumePrivilege	1196	WMIC.exe
Token: 33	1196	WMIC.exe
Token: 34	1196	WMIC.exe
Token: 35	1196	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1196	WMIC.exe
Token: SeSecurityPrivilege	1196	WMIC.exe
Token: SeTakeOwnershipPrivilege	1196	WMIC.exe
Token: SeLoadDriverPrivilege	1196	WMIC.exe
Token: SeSystemProfilePrivilege	1196	WMIC.exe
Token: SeSystemtimePrivilege	1196	WMIC.exe
Token: SeProfSingleProcessPrivilege	1196	WMIC.exe
Token: SeIncBasePriorityPrivilege	1196	WMIC.exe
Token: SeCreatePagefilePrivilege	1196	WMIC.exe
Token: SeBackupPrivilege	1196	WMIC.exe
Token: SeRestorePrivilege	1196	WMIC.exe
Token: SeShutdownPrivilege	1196	WMIC.exe
Token: SeDebugPrivilege	1196	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1196	WMIC.exe
Token: SeRemoteShutdownPrivilege	1196	WMIC.exe
Token: SeUndockPrivilege	1196	WMIC.exe
Token: SeManageVolumePrivilege	1196	WMIC.exe
Token: 33	1196	WMIC.exe
Token: 34	1196	WMIC.exe
Token: 35	1196	WMIC.exe
Token: SeBackupPrivilege	2368	wbengine.exe
Token: SeRestorePrivilege	2368	wbengine.exe
Token: SeSecurityPrivilege	2368	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1192 wrote to memory of 2920	1192	2024-05-17_5a493651ebb3bfd33efff93951a1c39e_destroyer_wannacry.exe	28
PID 1192 wrote to memory of 2920	1192	2024-05-17_5a493651ebb3bfd33efff93951a1c39e_destroyer_wannacry.exe	28
PID 1192 wrote to memory of 2920	1192	2024-05-17_5a493651ebb3bfd33efff93951a1c39e_destroyer_wannacry.exe	28
PID 2920 wrote to memory of 1940	2920	winlogon.exe	30
PID 2920 wrote to memory of 1940	2920	winlogon.exe	30
PID 2920 wrote to memory of 1940	2920	winlogon.exe	30
PID 1940 wrote to memory of 1692	1940	cmd.exe	32
PID 1940 wrote to memory of 1692	1940	cmd.exe	32
PID 1940 wrote to memory of 1692	1940	cmd.exe	32
PID 1940 wrote to memory of 1196	1940	cmd.exe	35
PID 1940 wrote to memory of 1196	1940	cmd.exe	35
PID 1940 wrote to memory of 1196	1940	cmd.exe	35
PID 2920 wrote to memory of 1608	2920	winlogon.exe	37
PID 2920 wrote to memory of 1608	2920	winlogon.exe	37
PID 2920 wrote to memory of 1608	2920	winlogon.exe	37
PID 1608 wrote to memory of 1892	1608	cmd.exe	39
PID 1608 wrote to memory of 1892	1608	cmd.exe	39
PID 1608 wrote to memory of 1892	1608	cmd.exe	39
PID 1608 wrote to memory of 1696	1608	cmd.exe	40
PID 1608 wrote to memory of 1696	1608	cmd.exe	40
PID 1608 wrote to memory of 1696	1608	cmd.exe	40
PID 2920 wrote to memory of 2484	2920	winlogon.exe	41
PID 2920 wrote to memory of 2484	2920	winlogon.exe	41
PID 2920 wrote to memory of 2484	2920	winlogon.exe	41
PID 2484 wrote to memory of 2140	2484	cmd.exe	43
PID 2484 wrote to memory of 2140	2484	cmd.exe	43
PID 2484 wrote to memory of 2140	2484	cmd.exe	43
PID 2920 wrote to memory of 696	2920	winlogon.exe	47
PID 2920 wrote to memory of 696	2920	winlogon.exe	47
PID 2920 wrote to memory of 696	2920	winlogon.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\2024-05-17_5a493651ebb3bfd33efff93951a1c39e_destroyer_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-17_5a493651ebb3bfd33efff93951a1c39e_destroyer_wannacry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1192
- C:\Users\Admin\AppData\Roaming\winlogon.exe
  "C:\Users\Admin\AppData\Roaming\winlogon.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:2920
- - 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:1940
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:1692
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:1196
- - 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:1608
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1892
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1696
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2484
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:2140
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\bot.txt
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:696

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2408

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2368

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:1680

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:884

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

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\winlogon.exe

Filesize
43KB

MD5
5a493651ebb3bfd33efff93951a1c39e

SHA1
e3a5f99912ecae3059d4aaf0a337773a8c591d3c

SHA256
e1319577144e33e76755ce24657a28b4bbbe2809fb2917590cc786f1b1293394

SHA512
0adab6a1a1583dc1f05da8fe5e178e3ca4d569865a94776e281d6e2751645e2275a8f91551bc13f24f3c0a09b577b682e1f5026837e271ebdbe39f18c93bd69c

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

Filesize
25B

MD5
3b21b92f6121f297db717b540fff87b8

SHA1
ad154c96bb9fcf9e671a807eb87c2083b9cf03a4

SHA256
bbac48b7084c4e86d42c528b568702f8aa0a36b4a64aa99fcdf76901c8ca9cad

SHA512
f2eac60dadb0b9b14609d4ae74fb10da354faa39bf0b6c121d2184e5d757275d376585a072b515840339abab95cd50352ebefb6b2746501ea20a3b2109973686

Download Submit
memory/1192-0-0x000007FEF5953000-0x000007FEF5954000-memory.dmp

Filesize
4KB

Download
memory/1192-1-0x0000000000330000-0x0000000000342000-memory.dmp

Filesize
72KB

Download
memory/2920-7-0x0000000000E20000-0x0000000000E32000-memory.dmp

Filesize
72KB

Download
memory/2920-9-0x000007FEF5950000-0x000007FEF633C000-memory.dmp

Filesize
9.9MB

Download
memory/2920-13-0x000007FEF5950000-0x000007FEF633C000-memory.dmp

Filesize
9.9MB

Download
memory/2920-490-0x000007FEF5950000-0x000007FEF633C000-memory.dmp

Filesize
9.9MB

Download