chaos | 1ba44b6e1caaed12c97316faf50d58ab0aefc7061150fa7ede47c9baddd1e753

Analysis

max time kernel
136s
max time network
143s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
08-09-2024 08:36

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General

Target

2024-09-08_99e391acbfc6d91858ab048423b1a90a_wannacry.exe
Size

120KB
MD5

99e391acbfc6d91858ab048423b1a90a
SHA1

3eec5857d841d4e31f70c53c8ebdfb6b4bfc0999
SHA256

1ba44b6e1caaed12c97316faf50d58ab0aefc7061150fa7ede47c9baddd1e753
SHA512

5c0d69a228a80cc04459d7edaacc7abd8f69c4888ed0576390212aa383604adb2cb0854ac0072a27a8734bb350b44ecf7ea7fccd8f6d782d517f2df1e44064b0
SSDEEP

1536:Ho2C1A03r9kX9kQjXpHyNXBj1fRRdsVJvywKyLDTV:Ho603r9kX97zpS91LRKVJvzKyL

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 2 IoCs

resource	yara_rule
behavioral2/memory/4900-1-0x0000000000610000-0x0000000000634000-memory.dmp	family_chaos
behavioral2/files/0x00060000000226c6-6.dat	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
744	bcdedit.exe
4116	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
4580	wbadmin.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation	2024-09-08_99e391acbfc6d91858ab048423b1a90a_wannacry.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation	svchost.exe

Drops startup file 3 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\read_it.txt	svchost.exe
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

Executes dropped EXE 1 IoCs

pid	Process
3728	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\Accessibility\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\OneDrive\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\Links\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\Libraries\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\Links\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\AppData\Roaming\Microsoft\Windows\Start Menu\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\AppData\Roaming\Microsoft\Windows\AccountPictures\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\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\Favorites\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\Camera Roll\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\SendTo\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-2170637797-568393320-3232933035-1000\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\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\Pictures\Saved Pictures\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\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Music\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\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\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-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\l71ia7tv1.jpg"	svchost.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Checks SCSI registry key(s) 3 TTPs 4 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\FriendlyName	vds.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CDROM&VEN_QEMU&PROD_QEMU_DVD-ROM\4&215468A5&0&010000	vds.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_QEMU&Prod_QEMU_DVD-ROM\4&215468a5&0&010000\FriendlyName	vds.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\DISK&VEN_WDC&PROD_WDS100T2B0A\4&215468A5&0&000000	vds.exe

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
1424	vssadmin.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000_Classes\Local Settings	svchost.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
3136	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
3728	svchost.exe

Suspicious behavior: EnumeratesProcesses 52 IoCs

pid	Process
4900	2024-09-08_99e391acbfc6d91858ab048423b1a90a_wannacry.exe
4900	2024-09-08_99e391acbfc6d91858ab048423b1a90a_wannacry.exe
4900	2024-09-08_99e391acbfc6d91858ab048423b1a90a_wannacry.exe
4900	2024-09-08_99e391acbfc6d91858ab048423b1a90a_wannacry.exe
4900	2024-09-08_99e391acbfc6d91858ab048423b1a90a_wannacry.exe
4900	2024-09-08_99e391acbfc6d91858ab048423b1a90a_wannacry.exe
4900	2024-09-08_99e391acbfc6d91858ab048423b1a90a_wannacry.exe
4900	2024-09-08_99e391acbfc6d91858ab048423b1a90a_wannacry.exe
4900	2024-09-08_99e391acbfc6d91858ab048423b1a90a_wannacry.exe
4900	2024-09-08_99e391acbfc6d91858ab048423b1a90a_wannacry.exe
4900	2024-09-08_99e391acbfc6d91858ab048423b1a90a_wannacry.exe
4900	2024-09-08_99e391acbfc6d91858ab048423b1a90a_wannacry.exe
4900	2024-09-08_99e391acbfc6d91858ab048423b1a90a_wannacry.exe
4900	2024-09-08_99e391acbfc6d91858ab048423b1a90a_wannacry.exe
4900	2024-09-08_99e391acbfc6d91858ab048423b1a90a_wannacry.exe
4900	2024-09-08_99e391acbfc6d91858ab048423b1a90a_wannacry.exe
4900	2024-09-08_99e391acbfc6d91858ab048423b1a90a_wannacry.exe
4900	2024-09-08_99e391acbfc6d91858ab048423b1a90a_wannacry.exe
4900	2024-09-08_99e391acbfc6d91858ab048423b1a90a_wannacry.exe
4900	2024-09-08_99e391acbfc6d91858ab048423b1a90a_wannacry.exe
4900	2024-09-08_99e391acbfc6d91858ab048423b1a90a_wannacry.exe
4900	2024-09-08_99e391acbfc6d91858ab048423b1a90a_wannacry.exe
4900	2024-09-08_99e391acbfc6d91858ab048423b1a90a_wannacry.exe
4900	2024-09-08_99e391acbfc6d91858ab048423b1a90a_wannacry.exe
4900	2024-09-08_99e391acbfc6d91858ab048423b1a90a_wannacry.exe
4900	2024-09-08_99e391acbfc6d91858ab048423b1a90a_wannacry.exe
3728	svchost.exe
3728	svchost.exe
3728	svchost.exe
3728	svchost.exe
3728	svchost.exe
3728	svchost.exe
3728	svchost.exe
3728	svchost.exe
3728	svchost.exe
3728	svchost.exe
3728	svchost.exe
3728	svchost.exe
3728	svchost.exe
3728	svchost.exe
3728	svchost.exe
3728	svchost.exe
3728	svchost.exe
3728	svchost.exe
3728	svchost.exe
3728	svchost.exe
3728	svchost.exe
3728	svchost.exe
3728	svchost.exe
3728	svchost.exe
3728	svchost.exe
3728	svchost.exe

Suspicious use of AdjustPrivilegeToken 50 IoCs

description	pid	Process
Token: SeDebugPrivilege	4900	2024-09-08_99e391acbfc6d91858ab048423b1a90a_wannacry.exe
Token: SeDebugPrivilege	3728	svchost.exe
Token: SeBackupPrivilege	3688	vssvc.exe
Token: SeRestorePrivilege	3688	vssvc.exe
Token: SeAuditPrivilege	3688	vssvc.exe
Token: SeIncreaseQuotaPrivilege	2236	WMIC.exe
Token: SeSecurityPrivilege	2236	WMIC.exe
Token: SeTakeOwnershipPrivilege	2236	WMIC.exe
Token: SeLoadDriverPrivilege	2236	WMIC.exe
Token: SeSystemProfilePrivilege	2236	WMIC.exe
Token: SeSystemtimePrivilege	2236	WMIC.exe
Token: SeProfSingleProcessPrivilege	2236	WMIC.exe
Token: SeIncBasePriorityPrivilege	2236	WMIC.exe
Token: SeCreatePagefilePrivilege	2236	WMIC.exe
Token: SeBackupPrivilege	2236	WMIC.exe
Token: SeRestorePrivilege	2236	WMIC.exe
Token: SeShutdownPrivilege	2236	WMIC.exe
Token: SeDebugPrivilege	2236	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2236	WMIC.exe
Token: SeRemoteShutdownPrivilege	2236	WMIC.exe
Token: SeUndockPrivilege	2236	WMIC.exe
Token: SeManageVolumePrivilege	2236	WMIC.exe
Token: 33	2236	WMIC.exe
Token: 34	2236	WMIC.exe
Token: 35	2236	WMIC.exe
Token: 36	2236	WMIC.exe
Token: SeIncreaseQuotaPrivilege	2236	WMIC.exe
Token: SeSecurityPrivilege	2236	WMIC.exe
Token: SeTakeOwnershipPrivilege	2236	WMIC.exe
Token: SeLoadDriverPrivilege	2236	WMIC.exe
Token: SeSystemProfilePrivilege	2236	WMIC.exe
Token: SeSystemtimePrivilege	2236	WMIC.exe
Token: SeProfSingleProcessPrivilege	2236	WMIC.exe
Token: SeIncBasePriorityPrivilege	2236	WMIC.exe
Token: SeCreatePagefilePrivilege	2236	WMIC.exe
Token: SeBackupPrivilege	2236	WMIC.exe
Token: SeRestorePrivilege	2236	WMIC.exe
Token: SeShutdownPrivilege	2236	WMIC.exe
Token: SeDebugPrivilege	2236	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2236	WMIC.exe
Token: SeRemoteShutdownPrivilege	2236	WMIC.exe
Token: SeUndockPrivilege	2236	WMIC.exe
Token: SeManageVolumePrivilege	2236	WMIC.exe
Token: 33	2236	WMIC.exe
Token: 34	2236	WMIC.exe
Token: 35	2236	WMIC.exe
Token: 36	2236	WMIC.exe
Token: SeBackupPrivilege	3972	wbengine.exe
Token: SeRestorePrivilege	3972	wbengine.exe
Token: SeSecurityPrivilege	3972	wbengine.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 4900 wrote to memory of 3728	4900	2024-09-08_99e391acbfc6d91858ab048423b1a90a_wannacry.exe	93
PID 4900 wrote to memory of 3728	4900	2024-09-08_99e391acbfc6d91858ab048423b1a90a_wannacry.exe	93
PID 3728 wrote to memory of 4140	3728	svchost.exe	97
PID 3728 wrote to memory of 4140	3728	svchost.exe	97
PID 4140 wrote to memory of 1424	4140	cmd.exe	99
PID 4140 wrote to memory of 1424	4140	cmd.exe	99
PID 4140 wrote to memory of 2236	4140	cmd.exe	102
PID 4140 wrote to memory of 2236	4140	cmd.exe	102
PID 3728 wrote to memory of 536	3728	svchost.exe	104
PID 3728 wrote to memory of 536	3728	svchost.exe	104
PID 536 wrote to memory of 744	536	cmd.exe	106
PID 536 wrote to memory of 744	536	cmd.exe	106
PID 536 wrote to memory of 4116	536	cmd.exe	107
PID 536 wrote to memory of 4116	536	cmd.exe	107
PID 3728 wrote to memory of 2996	3728	svchost.exe	108
PID 3728 wrote to memory of 2996	3728	svchost.exe	108
PID 2996 wrote to memory of 4580	2996	cmd.exe	110
PID 2996 wrote to memory of 4580	2996	cmd.exe	110
PID 3728 wrote to memory of 3136	3728	svchost.exe	114
PID 3728 wrote to memory of 3136	3728	svchost.exe	114

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\2024-09-08_99e391acbfc6d91858ab048423b1a90a_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-09-08_99e391acbfc6d91858ab048423b1a90a_wannacry.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4900
- C:\Users\Admin\AppData\Roaming\svchost.exe
  "C:\Users\Admin\AppData\Roaming\svchost.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Drops desktop.ini file(s)
  - Sets desktop wallpaper using registry
  - Modifies registry class
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3728
- - 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:4140
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:1424
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:2236
- - 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:536
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:744
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:4116
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2996
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:4580
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read_it.txt
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:3136

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4408,i,1330210614411927383,9239043499051775691,262144 --variations-seed-version --mojo-platform-channel-handle=1316 /prefetch:8
1⤵
PID:3172

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3688

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3972

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:852

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
- Checks SCSI registry key(s)
PID:600

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

Peripheral Device Discovery

T1120

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

Loading Replay Monitor...

Downloads

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

Filesize
120KB

MD5
99e391acbfc6d91858ab048423b1a90a

SHA1
3eec5857d841d4e31f70c53c8ebdfb6b4bfc0999

SHA256
1ba44b6e1caaed12c97316faf50d58ab0aefc7061150fa7ede47c9baddd1e753

SHA512
5c0d69a228a80cc04459d7edaacc7abd8f69c4888ed0576390212aa383604adb2cb0854ac0072a27a8734bb350b44ecf7ea7fccd8f6d782d517f2df1e44064b0

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

Filesize
172B

MD5
1d05c64d95b6489d728d09936b60f79c

SHA1
d75872e3f7b4fcf4a1a799074121bac197c43c1f

SHA256
a293e116e6613c0c1e5ccdc66b729290a8d32e2e2534d27096f99dfed1228013

SHA512
3ac0b057edd6829ff37a1d197b691959079cd6a03357f71378ceee040773d486a77c06aef422ee969d5f40a5fee01e82937796733cf7a9a862a2f874b1edcdfb

Download Submit
memory/3728-14-0x00007FFCBAA60000-0x00007FFCBB521000-memory.dmp

Filesize
10.8MB

Download
memory/3728-453-0x00007FFCBAA60000-0x00007FFCBB521000-memory.dmp

Filesize
10.8MB

Download
memory/4900-1-0x0000000000610000-0x0000000000634000-memory.dmp

Filesize
144KB

Download
memory/4900-0-0x00007FFCBAA63000-0x00007FFCBAA65000-memory.dmp

Filesize
8KB

Download