Analysis

  • max time kernel
    147s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14-10-2024 11:24

General

  • Target

    6622b3119c7f0e8c1228b18773cd76721c77a3fd7d871c8943974a034652b8a0.exe

  • Size

    238KB

  • MD5

    e6047ee3e2b7715bf8aa2ed7be60c9d7

  • SHA1

    8754c4ec41c424aca4e8e4d4f0dc69e0b6b08808

  • SHA256

    6622b3119c7f0e8c1228b18773cd76721c77a3fd7d871c8943974a034652b8a0

  • SHA512

    31458e228c2d778ad9eaf14fc7debec7bd00db22941d2fd5f29fa73b5f2f076210fd45db2fccd43851f0ce9ca02b77328047470dbd5258343f5e6f31211e965f

  • SSDEEP

    6144:mwDpmSK310WEb9GBW73mIX/MIos0Vdh1aQ:moppM10WSKY2IQVdz

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.

  • Creates new service(s) 2 TTPs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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.

  • 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.

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\6622b3119c7f0e8c1228b18773cd76721c77a3fd7d871c8943974a034652b8a0.exe
    "C:\Users\Admin\AppData\Local\Temp\6622b3119c7f0e8c1228b18773cd76721c77a3fd7d871c8943974a034652b8a0.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2032
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\oqdhixpg\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1788
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zczsjlfv.exe" C:\Windows\SysWOW64\oqdhixpg\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3596
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create oqdhixpg binPath= "C:\Windows\SysWOW64\oqdhixpg\zczsjlfv.exe /d\"C:\Users\Admin\AppData\Local\Temp\6622b3119c7f0e8c1228b18773cd76721c77a3fd7d871c8943974a034652b8a0.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3236
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description oqdhixpg "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4468
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start oqdhixpg
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2864
    • 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:2628
  • C:\Windows\SysWOW64\oqdhixpg\zczsjlfv.exe
    C:\Windows\SysWOW64\oqdhixpg\zczsjlfv.exe /d"C:\Users\Admin\AppData\Local\Temp\6622b3119c7f0e8c1228b18773cd76721c77a3fd7d871c8943974a034652b8a0.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3308
    • 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:3464

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\zczsjlfv.exe

    Filesize

    11.9MB

    MD5

    4e1c66a5b3ff735ef5e690443c9bb0e4

    SHA1

    9612626fd42b4b58ffc394354add288c381aec21

    SHA256

    2a5df453f6f0bfbacba8b8a4706caea08e858dc142f498f526f591079725de9b

    SHA512

    89c0db6a65803be6a10a6983accb942b6b56766e12528cc617c4384cf8cddf520efcf0357234b78ca94a07cd724c2c6bcef6f4bc5afb42e293bb89964efa739a

  • memory/2032-2-0x0000000002190000-0x00000000021A3000-memory.dmp

    Filesize

    76KB

  • memory/2032-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2032-7-0x00000000004E0000-0x00000000005E0000-memory.dmp

    Filesize

    1024KB

  • memory/2032-11-0x0000000002190000-0x00000000021A3000-memory.dmp

    Filesize

    76KB

  • memory/2032-1-0x00000000004E0000-0x00000000005E0000-memory.dmp

    Filesize

    1024KB

  • memory/2032-9-0x0000000000400000-0x0000000000443000-memory.dmp

    Filesize

    268KB

  • memory/2032-14-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/3308-15-0x0000000000400000-0x0000000000443000-memory.dmp

    Filesize

    268KB

  • memory/3308-10-0x0000000000400000-0x0000000000443000-memory.dmp

    Filesize

    268KB

  • memory/3464-53-0x0000000007B00000-0x0000000007F0B000-memory.dmp

    Filesize

    4.0MB

  • memory/3464-43-0x0000000002E10000-0x0000000002E20000-memory.dmp

    Filesize

    64KB

  • memory/3464-18-0x0000000000D40000-0x0000000000D55000-memory.dmp

    Filesize

    84KB

  • memory/3464-46-0x0000000002E10000-0x0000000002E20000-memory.dmp

    Filesize

    64KB

  • memory/3464-33-0x0000000002E10000-0x0000000002E20000-memory.dmp

    Filesize

    64KB

  • memory/3464-32-0x0000000002E10000-0x0000000002E20000-memory.dmp

    Filesize

    64KB

  • memory/3464-29-0x0000000002E10000-0x0000000002E20000-memory.dmp

    Filesize

    64KB

  • memory/3464-25-0x0000000002C00000-0x0000000002E0F000-memory.dmp

    Filesize

    2.1MB

  • memory/3464-12-0x0000000000D40000-0x0000000000D55000-memory.dmp

    Filesize

    84KB

  • memory/3464-52-0x0000000002FE0000-0x0000000002FE5000-memory.dmp

    Filesize

    20KB

  • memory/3464-49-0x0000000002FE0000-0x0000000002FE5000-memory.dmp

    Filesize

    20KB

  • memory/3464-48-0x0000000002E10000-0x0000000002E20000-memory.dmp

    Filesize

    64KB

  • memory/3464-47-0x0000000002E10000-0x0000000002E20000-memory.dmp

    Filesize

    64KB

  • memory/3464-45-0x0000000002E10000-0x0000000002E20000-memory.dmp

    Filesize

    64KB

  • memory/3464-44-0x0000000002E10000-0x0000000002E20000-memory.dmp

    Filesize

    64KB

  • memory/3464-17-0x0000000000D40000-0x0000000000D55000-memory.dmp

    Filesize

    84KB

  • memory/3464-42-0x0000000002E10000-0x0000000002E20000-memory.dmp

    Filesize

    64KB

  • memory/3464-41-0x0000000002E10000-0x0000000002E20000-memory.dmp

    Filesize

    64KB

  • memory/3464-40-0x0000000002E10000-0x0000000002E20000-memory.dmp

    Filesize

    64KB

  • memory/3464-39-0x0000000002E10000-0x0000000002E20000-memory.dmp

    Filesize

    64KB

  • memory/3464-38-0x0000000002E10000-0x0000000002E20000-memory.dmp

    Filesize

    64KB

  • memory/3464-37-0x0000000002E10000-0x0000000002E20000-memory.dmp

    Filesize

    64KB

  • memory/3464-36-0x0000000002E10000-0x0000000002E20000-memory.dmp

    Filesize

    64KB

  • memory/3464-35-0x0000000002E10000-0x0000000002E20000-memory.dmp

    Filesize

    64KB

  • memory/3464-34-0x0000000002E10000-0x0000000002E20000-memory.dmp

    Filesize

    64KB

  • memory/3464-26-0x00000000023F0000-0x00000000023F6000-memory.dmp

    Filesize

    24KB

  • memory/3464-23-0x0000000002C00000-0x0000000002E0F000-memory.dmp

    Filesize

    2.1MB

  • memory/3464-57-0x0000000002FF0000-0x0000000002FF7000-memory.dmp

    Filesize

    28KB

  • memory/3464-56-0x0000000007B00000-0x0000000007F0B000-memory.dmp

    Filesize

    4.0MB