Overview

overview

10

Static

static

3

cryptolaemus

windows10-2004-x64

10

cryptolaemus

windows11-21h2-x64

10

Analysis

  • max time kernel
    148s
  • 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 07:27

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General

  • Target

    938bdaad404914635b4acc4510fe1121b28c2131aeaa308783c3588e628347b3.exe

  • Size

    213KB

  • MD5

    4b549fa8c31524128d8ad39c341adc12

  • SHA1

    8679f2cd0dc019eb40cf6adf54d033092c844fef

  • SHA256

    938bdaad404914635b4acc4510fe1121b28c2131aeaa308783c3588e628347b3

  • SHA512

    9eb6d5ab732285eb7888b4714110fdc709e48400c09a3e9c6e64caf3fec3c82b6793d8de3761f72367487552f0c7dba725345ed10998583216d46a39f99dab74

  • SSDEEP

    6144:/zDXnqPnz5H7Mh27ROOSxJ/z/MB0Vdh1GQ:/nXq/z5H7Mho38/rVdz

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\938bdaad404914635b4acc4510fe1121b28c2131aeaa308783c3588e628347b3.exe
    "C:\Users\Admin\AppData\Local\Temp\938bdaad404914635b4acc4510fe1121b28c2131aeaa308783c3588e628347b3.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4956
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ccxkfxg\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3640
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\mygdjwca.exe" C:\Windows\SysWOW64\ccxkfxg\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3136
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create ccxkfxg binPath= "C:\Windows\SysWOW64\ccxkfxg\mygdjwca.exe /d\"C:\Users\Admin\AppData\Local\Temp\938bdaad404914635b4acc4510fe1121b28c2131aeaa308783c3588e628347b3.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2156
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description ccxkfxg "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4616
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start ccxkfxg
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:824
    • 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:3572
  • C:\Windows\SysWOW64\ccxkfxg\mygdjwca.exe
    C:\Windows\SysWOW64\ccxkfxg\mygdjwca.exe /d"C:\Users\Admin\AppData\Local\Temp\938bdaad404914635b4acc4510fe1121b28c2131aeaa308783c3588e628347b3.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2684
    • 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:3968

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\mygdjwca.exe
    Filesize

    10.7MB

    MD5

    8edd6e9b6bf4eeaa7556461b96dd2414

    SHA1

    507ffcf21c8e0c849fac22b220fbbc033d6096e1

    SHA256

    7e760fdea4c7f58308c413acbed34df60185a17c45fe64a1284dc7a599c44e5a

    SHA512

    69a9d42b6a22e9357bc6b631ff57a3f8551c6e1bbb9ff539dda5c750134cfaae28da75da94f5cb4cd64ff3bd61542e077395c4af6c330c6a369b22bcb9c14bc6

    Download Submit

  • memory/2684-14-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

    Download

  • memory/3968-46-0x00000000019E0000-0x00000000019F0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3968-36-0x00000000019E0000-0x00000000019F0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3968-24-0x00000000005F0000-0x00000000005F6000-memory.dmp

    Filesize

    24KB

    Download

  • memory/3968-45-0x00000000019E0000-0x00000000019F0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3968-27-0x00000000019E0000-0x00000000019F0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3968-30-0x00000000019E0000-0x00000000019F0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3968-20-0x0000000002200000-0x000000000240F000-memory.dmp

    Filesize

    2.1MB

    Download

  • memory/3968-23-0x0000000002200000-0x000000000240F000-memory.dmp

    Filesize

    2.1MB

    Download

  • memory/3968-15-0x0000000000390000-0x00000000003A5000-memory.dmp

    Filesize

    84KB

    Download

  • memory/3968-16-0x0000000000390000-0x00000000003A5000-memory.dmp

    Filesize

    84KB

    Download

  • memory/3968-39-0x00000000019E0000-0x00000000019F0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3968-51-0x0000000007240000-0x000000000764B000-memory.dmp

    Filesize

    4.0MB

    Download

  • memory/3968-55-0x00000000027D0000-0x00000000027D7000-memory.dmp

    Filesize

    28KB

    Download

  • memory/3968-54-0x0000000007240000-0x000000000764B000-memory.dmp

    Filesize

    4.0MB

    Download

  • memory/3968-50-0x00000000019F0000-0x00000000019F5000-memory.dmp

    Filesize

    20KB

    Download

  • memory/3968-47-0x00000000019F0000-0x00000000019F5000-memory.dmp

    Filesize

    20KB

    Download

  • memory/3968-8-0x0000000000390000-0x00000000003A5000-memory.dmp

    Filesize

    84KB

    Download

  • memory/3968-31-0x00000000019E0000-0x00000000019F0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3968-32-0x00000000019E0000-0x00000000019F0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3968-43-0x00000000019E0000-0x00000000019F0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3968-42-0x00000000019E0000-0x00000000019F0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3968-41-0x00000000019E0000-0x00000000019F0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3968-40-0x00000000019E0000-0x00000000019F0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3968-38-0x00000000019E0000-0x00000000019F0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3968-37-0x00000000019E0000-0x00000000019F0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3968-44-0x00000000019E0000-0x00000000019F0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3968-35-0x00000000019E0000-0x00000000019F0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3968-34-0x00000000019E0000-0x00000000019F0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3968-33-0x00000000019E0000-0x00000000019F0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4956-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

    Download

  • memory/4956-10-0x0000000000630000-0x0000000000730000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/4956-2-0x0000000002290000-0x00000000022A3000-memory.dmp

    Filesize

    76KB

    Download

  • memory/4956-13-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

    Download

  • memory/4956-11-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

    Download

  • memory/4956-12-0x0000000002290000-0x00000000022A3000-memory.dmp

    Filesize

    76KB

    Download

  • memory/4956-1-0x0000000000630000-0x0000000000730000-memory.dmp

    Filesize

    1024KB

    Download