chaos | ed12ea76d03b8255f361975cebd5c579491dacc60c52e03373e7bf509523820a

Analysis

max time kernel
31s
max time network
33s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
05/03/2023, 08:06

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General

Target

2023-03-04_72ea584eebe5705ea1fd5a02dbfe86a1_wannacry.exe
Size

458KB
MD5

72ea584eebe5705ea1fd5a02dbfe86a1
SHA1

f6d6cdef7eb41e9c201ee52832036bd8a68d0e44
SHA256

ed12ea76d03b8255f361975cebd5c579491dacc60c52e03373e7bf509523820a
SHA512

e928592dd7061388957c3f1acc82dfd8e105de486e8cbd4835029f7d302f71dcdcb8d9dfd0b2a5b53fbd2679dcc6f8559487e1e5767d26431fc67348d1f4ab08
SSDEEP

12288:GJaHnpS22Yh6Nesa6rZvvihw61SLQkY5Pa1uLkB3gE88uY2:DpSosXaYhVZVMVm2

Score

10^/10

chaos evasion ransomware spyware stealer

Malware Config

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 6 IoCs

resource	yara_rule
behavioral1/memory/1296-54-0x0000000001310000-0x0000000001388000-memory.dmp	family_chaos
behavioral1/files/0x000b0000000122e6-57.dat	family_chaos
behavioral1/files/0x000b0000000122e6-59.dat	family_chaos
behavioral1/memory/1244-60-0x0000000001080000-0x00000000010F8000-memory.dmp	family_chaos
behavioral1/memory/1244-67-0x0000000000E80000-0x0000000000F00000-memory.dmp	family_chaos
behavioral1/memory/1244-481-0x0000000000E80000-0x0000000000F00000-memory.dmp	family_chaos

Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware

File Deletion
T1107

Inhibit System Recovery
T1490

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
576	bcdedit.exe
764	bcdedit.exe

Deletes backup catalog 3 TTPs 1 IoCs

Uses wbadmin.exe to inhibit system recovery.

ransomware

Command-Line Interface

T1059

File Deletion

T1107

Inhibit System Recovery

T1490

pid	Process
900	wbadmin.exe

Modifies extensions of user files 5 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File renamed	C:\Users\Admin\Pictures\JoinUnregister.raw => C:\Users\Admin\Pictures\JoinUnregister.raw.wt0h	windows64.exe
File renamed	C:\Users\Admin\Pictures\LimitBlock.raw => C:\Users\Admin\Pictures\LimitBlock.raw.fetx	windows64.exe
File renamed	C:\Users\Admin\Pictures\ExitSync.tif => C:\Users\Admin\Pictures\ExitSync.tif.4e6u	windows64.exe
File renamed	C:\Users\Admin\Pictures\FormatEnable.raw => C:\Users\Admin\Pictures\FormatEnable.raw.kvre	windows64.exe
File renamed	C:\Users\Admin\Pictures\GetApprove.png => C:\Users\Admin\Pictures\GetApprove.png.ukrl	windows64.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	windows64.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\czytaj_to.txt	windows64.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\windows64.url	windows64.exe

Executes dropped EXE 1 IoCs

pid	Process
1244	windows64.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
T1081

Drops desktop.ini file(s) 33 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini	windows64.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini	windows64.exe
File opened for modification	C:\Users\Public\Music\Sample Music\desktop.ini	windows64.exe
File opened for modification	C:\Users\Admin\Favorites\Links for United States\desktop.ini	windows64.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini	windows64.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	windows64.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	windows64.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	windows64.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini	windows64.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	windows64.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\desktop.ini	windows64.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	windows64.exe
File opened for modification	C:\Users\Admin\Searches\desktop.ini	windows64.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini	windows64.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini	windows64.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	windows64.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	windows64.exe
File opened for modification	C:\Users\Public\Pictures\Sample Pictures\desktop.ini	windows64.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	windows64.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	windows64.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini	windows64.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	windows64.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini	windows64.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini	windows64.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	windows64.exe
File opened for modification	C:\Users\Admin\Videos\desktop.ini	windows64.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini	windows64.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	windows64.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	windows64.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	windows64.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini	windows64.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini	windows64.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	windows64.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-1-5-21-3948302646-268491222-1934009652-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ppfya6u1x.jpg"	windows64.exe

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

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

T1107

Inhibit System Recovery

T1490

pid	Process
1564	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
1652	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1244	windows64.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1296	2023-03-04_72ea584eebe5705ea1fd5a02dbfe86a1_wannacry.exe
1244	windows64.exe
1244	windows64.exe
1244	windows64.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	1296	2023-03-04_72ea584eebe5705ea1fd5a02dbfe86a1_wannacry.exe
Token: SeDebugPrivilege	1244	windows64.exe
Token: SeBackupPrivilege	1116	vssvc.exe
Token: SeRestorePrivilege	1116	vssvc.exe
Token: SeAuditPrivilege	1116	vssvc.exe
Token: SeIncreaseQuotaPrivilege	1304	WMIC.exe
Token: SeSecurityPrivilege	1304	WMIC.exe
Token: SeTakeOwnershipPrivilege	1304	WMIC.exe
Token: SeLoadDriverPrivilege	1304	WMIC.exe
Token: SeSystemProfilePrivilege	1304	WMIC.exe
Token: SeSystemtimePrivilege	1304	WMIC.exe
Token: SeProfSingleProcessPrivilege	1304	WMIC.exe
Token: SeIncBasePriorityPrivilege	1304	WMIC.exe
Token: SeCreatePagefilePrivilege	1304	WMIC.exe
Token: SeBackupPrivilege	1304	WMIC.exe
Token: SeRestorePrivilege	1304	WMIC.exe
Token: SeShutdownPrivilege	1304	WMIC.exe
Token: SeDebugPrivilege	1304	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1304	WMIC.exe
Token: SeRemoteShutdownPrivilege	1304	WMIC.exe
Token: SeUndockPrivilege	1304	WMIC.exe
Token: SeManageVolumePrivilege	1304	WMIC.exe
Token: 33	1304	WMIC.exe
Token: 34	1304	WMIC.exe
Token: 35	1304	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1304	WMIC.exe
Token: SeSecurityPrivilege	1304	WMIC.exe
Token: SeTakeOwnershipPrivilege	1304	WMIC.exe
Token: SeLoadDriverPrivilege	1304	WMIC.exe
Token: SeSystemProfilePrivilege	1304	WMIC.exe
Token: SeSystemtimePrivilege	1304	WMIC.exe
Token: SeProfSingleProcessPrivilege	1304	WMIC.exe
Token: SeIncBasePriorityPrivilege	1304	WMIC.exe
Token: SeCreatePagefilePrivilege	1304	WMIC.exe
Token: SeBackupPrivilege	1304	WMIC.exe
Token: SeRestorePrivilege	1304	WMIC.exe
Token: SeShutdownPrivilege	1304	WMIC.exe
Token: SeDebugPrivilege	1304	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1304	WMIC.exe
Token: SeRemoteShutdownPrivilege	1304	WMIC.exe
Token: SeUndockPrivilege	1304	WMIC.exe
Token: SeManageVolumePrivilege	1304	WMIC.exe
Token: 33	1304	WMIC.exe
Token: 34	1304	WMIC.exe
Token: 35	1304	WMIC.exe
Token: SeBackupPrivilege	664	wbengine.exe
Token: SeRestorePrivilege	664	wbengine.exe
Token: SeSecurityPrivilege	664	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1296 wrote to memory of 1244	1296	2023-03-04_72ea584eebe5705ea1fd5a02dbfe86a1_wannacry.exe	28
PID 1296 wrote to memory of 1244	1296	2023-03-04_72ea584eebe5705ea1fd5a02dbfe86a1_wannacry.exe	28
PID 1296 wrote to memory of 1244	1296	2023-03-04_72ea584eebe5705ea1fd5a02dbfe86a1_wannacry.exe	28
PID 1244 wrote to memory of 688	1244	windows64.exe	30
PID 1244 wrote to memory of 688	1244	windows64.exe	30
PID 1244 wrote to memory of 688	1244	windows64.exe	30
PID 688 wrote to memory of 1564	688	cmd.exe	32
PID 688 wrote to memory of 1564	688	cmd.exe	32
PID 688 wrote to memory of 1564	688	cmd.exe	32
PID 688 wrote to memory of 1304	688	cmd.exe	36
PID 688 wrote to memory of 1304	688	cmd.exe	36
PID 688 wrote to memory of 1304	688	cmd.exe	36
PID 1244 wrote to memory of 980	1244	windows64.exe	38
PID 1244 wrote to memory of 980	1244	windows64.exe	38
PID 1244 wrote to memory of 980	1244	windows64.exe	38
PID 980 wrote to memory of 576	980	cmd.exe	40
PID 980 wrote to memory of 576	980	cmd.exe	40
PID 980 wrote to memory of 576	980	cmd.exe	40
PID 980 wrote to memory of 764	980	cmd.exe	41
PID 980 wrote to memory of 764	980	cmd.exe	41
PID 980 wrote to memory of 764	980	cmd.exe	41
PID 1244 wrote to memory of 1060	1244	windows64.exe	42
PID 1244 wrote to memory of 1060	1244	windows64.exe	42
PID 1244 wrote to memory of 1060	1244	windows64.exe	42
PID 1060 wrote to memory of 900	1060	cmd.exe	44
PID 1060 wrote to memory of 900	1060	cmd.exe	44
PID 1060 wrote to memory of 900	1060	cmd.exe	44
PID 1244 wrote to memory of 1652	1244	windows64.exe	48
PID 1244 wrote to memory of 1652	1244	windows64.exe	48
PID 1244 wrote to memory of 1652	1244	windows64.exe	48

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\2023-03-04_72ea584eebe5705ea1fd5a02dbfe86a1_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2023-03-04_72ea584eebe5705ea1fd5a02dbfe86a1_wannacry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1296
- C:\Users\Admin\AppData\Roaming\windows64.exe
  "C:\Users\Admin\AppData\Roaming\windows64.exe"
  2⤵
  - Modifies extensions of user files
  - 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:1244
- - 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:688
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:1564
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:1304
- - 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:980
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:576
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:764
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1060
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:900
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\czytaj_to.txt
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:1652

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1116

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:664

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:1020

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:1140

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Command-Line Interface

T1059

Persistence

Privilege Escalation

Defense Evasion

File Deletion

T1107

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

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\czytaj_to.txt

Filesize
591B

MD5
b2fd1728b964abbf390a9e7bcef59fee

SHA1
9f5da0e46e72a2943a1a3f181b7c891164704120

SHA256
ce781cb3b8b9bc5c31a6a1aeeb80e73e9f90fa86e96e66e96a2790f47bb517b3

SHA512
8455f7e21489ccd2ed6ffaf69171193c3176d389b89fc64450b5ba1c2817b3797df9de5a7749f677a44bf9146ce01d26c574637bb9678c0bde7953f1cdf6b26f

Download Submit
C:\Users\Admin\AppData\Roaming\windows64.exe

Filesize
458KB

MD5
72ea584eebe5705ea1fd5a02dbfe86a1

SHA1
f6d6cdef7eb41e9c201ee52832036bd8a68d0e44

SHA256
ed12ea76d03b8255f361975cebd5c579491dacc60c52e03373e7bf509523820a

SHA512
e928592dd7061388957c3f1acc82dfd8e105de486e8cbd4835029f7d302f71dcdcb8d9dfd0b2a5b53fbd2679dcc6f8559487e1e5767d26431fc67348d1f4ab08

Download Submit
C:\Users\Admin\AppData\Roaming\windows64.exe

Filesize
458KB

MD5
72ea584eebe5705ea1fd5a02dbfe86a1

SHA1
f6d6cdef7eb41e9c201ee52832036bd8a68d0e44

SHA256
ed12ea76d03b8255f361975cebd5c579491dacc60c52e03373e7bf509523820a

SHA512
e928592dd7061388957c3f1acc82dfd8e105de486e8cbd4835029f7d302f71dcdcb8d9dfd0b2a5b53fbd2679dcc6f8559487e1e5767d26431fc67348d1f4ab08

Download Submit
C:\Users\Admin\Downloads\czytaj_to.txt

Filesize
591B

MD5
b2fd1728b964abbf390a9e7bcef59fee

SHA1
9f5da0e46e72a2943a1a3f181b7c891164704120

SHA256
ce781cb3b8b9bc5c31a6a1aeeb80e73e9f90fa86e96e66e96a2790f47bb517b3

SHA512
8455f7e21489ccd2ed6ffaf69171193c3176d389b89fc64450b5ba1c2817b3797df9de5a7749f677a44bf9146ce01d26c574637bb9678c0bde7953f1cdf6b26f

Download Submit
memory/1244-60-0x0000000001080000-0x00000000010F8000-memory.dmp

Filesize
480KB

Download
memory/1244-67-0x0000000000E80000-0x0000000000F00000-memory.dmp

Filesize
512KB

Download
memory/1244-481-0x0000000000E80000-0x0000000000F00000-memory.dmp

Filesize
512KB

Download
memory/1296-54-0x0000000001310000-0x0000000001388000-memory.dmp

Filesize
480KB

Download