chaos | 3bac13b433b453c3db0f70f4e3ce07a2c1108a0892bac358a1d1b38a30e1cd08

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
17-04-2024 13:38

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General

Target

2024-04-17_9f99b9ecdb90b991aa0eb5884523185f_wannacry.exe
Size

165KB
MD5

9f99b9ecdb90b991aa0eb5884523185f
SHA1

5d99a9343765bb758f8ee85585dd376ec190c6e4
SHA256

3bac13b433b453c3db0f70f4e3ce07a2c1108a0892bac358a1d1b38a30e1cd08
SHA512

5c7a8f872bd0c5800e60e164eb605650eac06a6fc07322ab78274cd9c024e08c7cb8797580ecfb9067efd0ab6a1117e5c23fd78b4e6256ccecea4997f0859ed5
SSDEEP

3072:36oLuur9P2Wr6QhzaNpatUPp0hmHzs/0ui8N/Wm9BsB85:dr9P2Wrb2R0Ya/28

Score

10^/10

chaos evasion ransomware spyware stealer

Malware Config

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 4 IoCs

resource	yara_rule
behavioral1/memory/1096-0-0x00000000001B0000-0x00000000001DE000-memory.dmp	family_chaos
behavioral1/files/0x000b000000012256-5.dat	family_chaos
behavioral1/memory/1760-7-0x0000000001350000-0x000000000137E000-memory.dmp	family_chaos
behavioral1/memory/1760-11-0x000000001A860000-0x000000001A8E0000-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 4 IoCs

resource	yara_rule
behavioral1/memory/1096-0-0x00000000001B0000-0x00000000001DE000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/files/0x000b000000012256-5.dat	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/memory/1760-7-0x0000000001350000-0x000000000137E000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/memory/1760-11-0x000000001A860000-0x000000001A8E0000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
1672	bcdedit.exe
540	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
1508	wbadmin.exe

Drops startup file 3 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
1760	notepad.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\Saved Games\desktop.ini	notepad.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini	notepad.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	notepad.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini	notepad.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini	notepad.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	notepad.exe
File opened for modification	C:\Users\Public\Pictures\Sample Pictures\desktop.ini	notepad.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\desktop.ini	notepad.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	notepad.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	notepad.exe
File opened for modification	C:\Users\Admin\Searches\desktop.ini	notepad.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	notepad.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	notepad.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	notepad.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-1298544033-3225604241-2703760938-1000\desktop.ini	notepad.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	notepad.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	notepad.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	notepad.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	notepad.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini	notepad.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini	notepad.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini	notepad.exe
File opened for modification	C:\Users\Public\Music\Sample Music\desktop.ini	notepad.exe
File opened for modification	C:\Users\Admin\Videos\desktop.ini	notepad.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini	notepad.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini	notepad.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini	notepad.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini	notepad.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	notepad.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	notepad.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	notepad.exe
File opened for modification	C:\Users\Admin\Favorites\Links for United States\desktop.ini	notepad.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini	notepad.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini	notepad.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-1-5-21-1298544033-3225604241-2703760938-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\Pictures\\My Wallpaper.jpg"	notepad.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\43kw998pf.jpg"	notepad.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
2356	vssadmin.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1760	notepad.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1096	2024-04-17_9f99b9ecdb90b991aa0eb5884523185f_wannacry.exe
1096	2024-04-17_9f99b9ecdb90b991aa0eb5884523185f_wannacry.exe
1760	notepad.exe
1760	notepad.exe
1760	notepad.exe
1760	notepad.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	1096	2024-04-17_9f99b9ecdb90b991aa0eb5884523185f_wannacry.exe
Token: SeDebugPrivilege	1760	notepad.exe
Token: SeBackupPrivilege	2420	vssvc.exe
Token: SeRestorePrivilege	2420	vssvc.exe
Token: SeAuditPrivilege	2420	vssvc.exe
Token: SeIncreaseQuotaPrivilege	1992	WMIC.exe
Token: SeSecurityPrivilege	1992	WMIC.exe
Token: SeTakeOwnershipPrivilege	1992	WMIC.exe
Token: SeLoadDriverPrivilege	1992	WMIC.exe
Token: SeSystemProfilePrivilege	1992	WMIC.exe
Token: SeSystemtimePrivilege	1992	WMIC.exe
Token: SeProfSingleProcessPrivilege	1992	WMIC.exe
Token: SeIncBasePriorityPrivilege	1992	WMIC.exe
Token: SeCreatePagefilePrivilege	1992	WMIC.exe
Token: SeBackupPrivilege	1992	WMIC.exe
Token: SeRestorePrivilege	1992	WMIC.exe
Token: SeShutdownPrivilege	1992	WMIC.exe
Token: SeDebugPrivilege	1992	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1992	WMIC.exe
Token: SeRemoteShutdownPrivilege	1992	WMIC.exe
Token: SeUndockPrivilege	1992	WMIC.exe
Token: SeManageVolumePrivilege	1992	WMIC.exe
Token: 33	1992	WMIC.exe
Token: 34	1992	WMIC.exe
Token: 35	1992	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1992	WMIC.exe
Token: SeSecurityPrivilege	1992	WMIC.exe
Token: SeTakeOwnershipPrivilege	1992	WMIC.exe
Token: SeLoadDriverPrivilege	1992	WMIC.exe
Token: SeSystemProfilePrivilege	1992	WMIC.exe
Token: SeSystemtimePrivilege	1992	WMIC.exe
Token: SeProfSingleProcessPrivilege	1992	WMIC.exe
Token: SeIncBasePriorityPrivilege	1992	WMIC.exe
Token: SeCreatePagefilePrivilege	1992	WMIC.exe
Token: SeBackupPrivilege	1992	WMIC.exe
Token: SeRestorePrivilege	1992	WMIC.exe
Token: SeShutdownPrivilege	1992	WMIC.exe
Token: SeDebugPrivilege	1992	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1992	WMIC.exe
Token: SeRemoteShutdownPrivilege	1992	WMIC.exe
Token: SeUndockPrivilege	1992	WMIC.exe
Token: SeManageVolumePrivilege	1992	WMIC.exe
Token: 33	1992	WMIC.exe
Token: 34	1992	WMIC.exe
Token: 35	1992	WMIC.exe
Token: SeBackupPrivilege	2472	wbengine.exe
Token: SeRestorePrivilege	2472	wbengine.exe
Token: SeSecurityPrivilege	2472	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1096 wrote to memory of 1760	1096	2024-04-17_9f99b9ecdb90b991aa0eb5884523185f_wannacry.exe	28
PID 1096 wrote to memory of 1760	1096	2024-04-17_9f99b9ecdb90b991aa0eb5884523185f_wannacry.exe	28
PID 1096 wrote to memory of 1760	1096	2024-04-17_9f99b9ecdb90b991aa0eb5884523185f_wannacry.exe	28
PID 1760 wrote to memory of 2964	1760	notepad.exe	30
PID 1760 wrote to memory of 2964	1760	notepad.exe	30
PID 1760 wrote to memory of 2964	1760	notepad.exe	30
PID 2964 wrote to memory of 2356	2964	cmd.exe	32
PID 2964 wrote to memory of 2356	2964	cmd.exe	32
PID 2964 wrote to memory of 2356	2964	cmd.exe	32
PID 2964 wrote to memory of 1992	2964	cmd.exe	35
PID 2964 wrote to memory of 1992	2964	cmd.exe	35
PID 2964 wrote to memory of 1992	2964	cmd.exe	35
PID 1760 wrote to memory of 2884	1760	notepad.exe	37
PID 1760 wrote to memory of 2884	1760	notepad.exe	37
PID 1760 wrote to memory of 2884	1760	notepad.exe	37
PID 2884 wrote to memory of 1672	2884	cmd.exe	39
PID 2884 wrote to memory of 1672	2884	cmd.exe	39
PID 2884 wrote to memory of 1672	2884	cmd.exe	39
PID 2884 wrote to memory of 540	2884	cmd.exe	40
PID 2884 wrote to memory of 540	2884	cmd.exe	40
PID 2884 wrote to memory of 540	2884	cmd.exe	40
PID 1760 wrote to memory of 676	1760	notepad.exe	41
PID 1760 wrote to memory of 676	1760	notepad.exe	41
PID 1760 wrote to memory of 676	1760	notepad.exe	41
PID 676 wrote to memory of 1508	676	cmd.exe	43
PID 676 wrote to memory of 1508	676	cmd.exe	43
PID 676 wrote to memory of 1508	676	cmd.exe	43
PID 1760 wrote to memory of 1860	1760	notepad.exe	47
PID 1760 wrote to memory of 1860	1760	notepad.exe	47
PID 1760 wrote to memory of 1860	1760	notepad.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\2024-04-17_9f99b9ecdb90b991aa0eb5884523185f_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-17_9f99b9ecdb90b991aa0eb5884523185f_wannacry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1096
- C:\Users\Admin\AppData\Roaming\notepad.exe
  "C:\Users\Admin\AppData\Roaming\notepad.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:1760
- - 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:2964
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:2356
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:1992
- - 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:2884
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1672
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:540
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:676
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:1508
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\READ THIS.txt
    3⤵
    PID:1860

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2420

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2472

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:696

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:2304

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

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\notepad.exe

Filesize
165KB

MD5
9f99b9ecdb90b991aa0eb5884523185f

SHA1
5d99a9343765bb758f8ee85585dd376ec190c6e4

SHA256
3bac13b433b453c3db0f70f4e3ce07a2c1108a0892bac358a1d1b38a30e1cd08

SHA512
5c7a8f872bd0c5800e60e164eb605650eac06a6fc07322ab78274cd9c024e08c7cb8797580ecfb9067efd0ab6a1117e5c23fd78b4e6256ccecea4997f0859ed5

Download Submit
C:\Users\Admin\Documents\READ THIS.txt

Filesize
116B

MD5
8997745ddb6aa0ec242fedebb654f82f

SHA1
9c3b22208cede1c038ae8a05f021d2c2d7060b5a

SHA256
379e87e41323764decd229c8838aff8f17b334afe0c126737ad343e31fd9c94b

SHA512
597c97b8afe2f37437b57a2f21206625ecf8bf1abf31f776e45ef4503c06152ef89d5855c160296f564abcb801161a9e35e4c4deb903b4cef794e187d8f7f506

Download Submit
memory/1096-0-0x00000000001B0000-0x00000000001DE000-memory.dmp

Filesize
184KB

Download
memory/1096-1-0x000007FEF5CD0000-0x000007FEF66BC000-memory.dmp

Filesize
9.9MB

Download
memory/1096-8-0x000007FEF5CD0000-0x000007FEF66BC000-memory.dmp

Filesize
9.9MB

Download
memory/1760-7-0x0000000001350000-0x000000000137E000-memory.dmp

Filesize
184KB

Download
memory/1760-9-0x000007FEF5CD0000-0x000007FEF66BC000-memory.dmp

Filesize
9.9MB

Download
memory/1760-11-0x000000001A860000-0x000000001A8E0000-memory.dmp

Filesize
512KB

Download
memory/1760-443-0x000007FEF5CD0000-0x000007FEF66BC000-memory.dmp

Filesize
9.9MB

Download
memory/1760-444-0x000000001A860000-0x000000001A8E0000-memory.dmp

Filesize
512KB

Download