Overview

overview

10

Static

static

3

cryptolaemus

windows10-2004-x64

10

cryptolaemus

windows11-21h2-x64

10

Analysis

  • max time kernel
    147s
  • max time network
    151s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240802-en
  • resource tags

    arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    06-09-2024 12:51

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General

  • Target

    8f6bbc692073146dfc23b5743a53d2abc158831b64964de5ec6a15cf573bf8d3.exe

  • Size

    213KB

  • MD5

    9ad5cb5878facd1f519325f68cb408a1

  • SHA1

    64450bf9e67e5001835661493053e6ce67cc42b5

  • SHA256

    8f6bbc692073146dfc23b5743a53d2abc158831b64964de5ec6a15cf573bf8d3

  • SHA512

    5a45b850989000c24a25ac27a4ca3480bfed933912e7add4834f5c443486240d60d9a56a5418ca43ac0888898072de72cb029dfb29105560192937d10a93b0bd

  • SSDEEP

    6144:1DDXnqPnz5vSel6TKC1onDZ/MU0Vdh1HQ:1XXq/z5vSNKC1onDSVdz

Score
10/10
tofseediscoveryevasionexecutionpersistenceprivilege_escalationtrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

    trojantofsee
  • Creates new service(s) 2 TTPs
    persistenceexecution
  • Modifies Windows Firewall 2 TTPs 1 IoCs
    evasion
  • Sets service image path in registry 2 TTPs 1 IoCs
    persistence
  • Executes dropped EXE 1 IoCs
  • Drops file in System32 directory 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Launches sc.exe 3 IoCs

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

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

    persistenceprivilege_escalation
  • System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

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

    discovery
  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8f6bbc692073146dfc23b5743a53d2abc158831b64964de5ec6a15cf573bf8d3.exe
    "C:\Users\Admin\AppData\Local\Temp\8f6bbc692073146dfc23b5743a53d2abc158831b64964de5ec6a15cf573bf8d3.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1120
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\mkglysbg\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2208
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\orohyauk.exe" C:\Windows\SysWOW64\mkglysbg\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3268
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create mkglysbg binPath= "C:\Windows\SysWOW64\mkglysbg\orohyauk.exe /d\"C:\Users\Admin\AppData\Local\Temp\8f6bbc692073146dfc23b5743a53d2abc158831b64964de5ec6a15cf573bf8d3.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2008
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description mkglysbg "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3640
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start mkglysbg
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1908
    • C:\Windows\SysWOW64\netsh.exe
      "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
      2⤵
      • Modifies Windows Firewall
      • Event Triggered Execution: Netsh Helper DLL
      • System Location Discovery: System Language Discovery
      PID:3820
  • C:\Windows\SysWOW64\mkglysbg\orohyauk.exe
    C:\Windows\SysWOW64\mkglysbg\orohyauk.exe /d"C:\Users\Admin\AppData\Local\Temp\8f6bbc692073146dfc23b5743a53d2abc158831b64964de5ec6a15cf573bf8d3.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3860
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Drops file in System32 directory
      • System Location Discovery: System Language Discovery
      • Modifies data under HKEY_USERS
      PID:1692

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1
T1569

Service Execution

1
T1569.002

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Event Triggered Execution

1
T1546

Netsh Helper DLL

1
T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Event Triggered Execution

1
T1546

Netsh Helper DLL

1
T1546.007

Defense Evasion

Impair Defenses

1
T1562

Disable or Modify System Firewall

1
T1562.004

Modify Registry

1
T1112

Credential Access

Discovery

System Information Discovery

1
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\orohyauk.exe
    Filesize

    11.4MB

    MD5

    4fff9700e62740c1bccecefe66d91c07

    SHA1

    613337973530c0efd969439b25116715840b53be

    SHA256

    589244f002c9c6739228213c6e2148d5a70280ddc7f0277b1872bfa1ac8037ad

    SHA512

    3520d133ec454bdb156b2c7daf1b0070c84e47f94d48a39706636581c02ca6a8c43e89556d2c28a764c0104c056fef11d4231c698ef50bfd2f86b447f9712280

    Download Submit

  • memory/1120-13-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

    Download

  • memory/1120-2-0x0000000000660000-0x0000000000673000-memory.dmp

    Filesize

    76KB

    Download

  • memory/1120-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

    Download

  • memory/1120-7-0x0000000000680000-0x0000000000780000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/1120-1-0x0000000000680000-0x0000000000780000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/1120-11-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

    Download

  • memory/1120-12-0x0000000000660000-0x0000000000673000-memory.dmp

    Filesize

    76KB

    Download

  • memory/1692-38-0x0000000001BD0000-0x0000000001BE0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-42-0x0000000001BD0000-0x0000000001BE0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-15-0x0000000000580000-0x0000000000595000-memory.dmp

    Filesize

    84KB

    Download

  • memory/1692-16-0x0000000000580000-0x0000000000595000-memory.dmp

    Filesize

    84KB

    Download

  • memory/1692-55-0x0000000007440000-0x000000000784B000-memory.dmp

    Filesize

    4.0MB

    Download

  • memory/1692-44-0x0000000001BD0000-0x0000000001BE0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-33-0x0000000001BD0000-0x0000000001BE0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-56-0x0000000001BF0000-0x0000000001BF7000-memory.dmp

    Filesize

    28KB

    Download

  • memory/1692-52-0x0000000007440000-0x000000000784B000-memory.dmp

    Filesize

    4.0MB

    Download

  • memory/1692-51-0x0000000001BE0000-0x0000000001BE5000-memory.dmp

    Filesize

    20KB

    Download

  • memory/1692-48-0x0000000001BE0000-0x0000000001BE5000-memory.dmp

    Filesize

    20KB

    Download

  • memory/1692-47-0x0000000001BD0000-0x0000000001BE0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-46-0x0000000001BD0000-0x0000000001BE0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-45-0x0000000001BD0000-0x0000000001BE0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-43-0x0000000001BD0000-0x0000000001BE0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-21-0x0000000002400000-0x000000000260F000-memory.dmp

    Filesize

    2.1MB

    Download

  • memory/1692-41-0x0000000001BD0000-0x0000000001BE0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-40-0x0000000001BD0000-0x0000000001BE0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-39-0x0000000001BD0000-0x0000000001BE0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-9-0x0000000000580000-0x0000000000595000-memory.dmp

    Filesize

    84KB

    Download

  • memory/1692-37-0x0000000001BD0000-0x0000000001BE0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-36-0x0000000001BD0000-0x0000000001BE0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-35-0x0000000001BD0000-0x0000000001BE0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-34-0x0000000001BD0000-0x0000000001BE0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-32-0x0000000001BD0000-0x0000000001BE0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-31-0x0000000001BD0000-0x0000000001BE0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-28-0x0000000001BD0000-0x0000000001BE0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-25-0x0000000000BC0000-0x0000000000BC6000-memory.dmp

    Filesize

    24KB

    Download

  • memory/1692-24-0x0000000002400000-0x000000000260F000-memory.dmp

    Filesize

    2.1MB

    Download

  • memory/3860-14-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

    Download