Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05-09-2024 01:45

General

  • Target

    bb3a5c0114dc8dbc9fce30575cb5f0bf2709253a66ebfb8809a88d50490a5b36.exe

  • Size

    213KB

  • MD5

    b89aff3b390a672343dc60c215c28bdb

  • SHA1

    e3828b70636ed31eacdcbae862d8d5487f78cd90

  • SHA256

    bb3a5c0114dc8dbc9fce30575cb5f0bf2709253a66ebfb8809a88d50490a5b36

  • SHA512

    177c7babcbcb801e4f879e07a3a7591eceae64bd938aa47182a23ba0dd4e36541fed6590326f22623f4775fc7b8b3b359efb775376eb7a9682ae373d3330a5eb

  • SSDEEP

    3072:mSKC+fip7D1JpMrTMWqdNmOyjzUcLzxJzQlfDKNShs5bQ:Yfip7D1Jp6A1gOKLa2Aw

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.

  • Deletes itself 1 IoCs
  • 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\bb3a5c0114dc8dbc9fce30575cb5f0bf2709253a66ebfb8809a88d50490a5b36.exe
    "C:\Users\Admin\AppData\Local\Temp\bb3a5c0114dc8dbc9fce30575cb5f0bf2709253a66ebfb8809a88d50490a5b36.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3556
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\dixdlra\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4684
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\aphotrwo.exe" C:\Windows\SysWOW64\dixdlra\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:5952
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create dixdlra binPath= "C:\Windows\SysWOW64\dixdlra\aphotrwo.exe /d\"C:\Users\Admin\AppData\Local\Temp\bb3a5c0114dc8dbc9fce30575cb5f0bf2709253a66ebfb8809a88d50490a5b36.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:5892
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description dixdlra "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:5968
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start dixdlra
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2516
    • 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:5516
  • C:\Windows\SysWOW64\dixdlra\aphotrwo.exe
    C:\Windows\SysWOW64\dixdlra\aphotrwo.exe /d"C:\Users\Admin\AppData\Local\Temp\bb3a5c0114dc8dbc9fce30575cb5f0bf2709253a66ebfb8809a88d50490a5b36.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5832
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Deletes itself
      • Drops file in System32 directory
      • System Location Discovery: System Language Discovery
      • Modifies data under HKEY_USERS
      PID:3600

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    13.1MB

    MD5

    396cede827db9d6420e3a518e9386328

    SHA1

    16077dc5c0dff3b2d0bb2c2036d06fa8e50445e5

    SHA256

    63274b74c2aa12cff9bd6da154c89ecbf6d28a1fc9c5baf0f0feef7107cd1981

    SHA512

    713e92714edef10d6312ec8da888216bbb4c9effdd01efa32f5fdf8ab7a58a3294280b32a18f5adfcbfed87b0bb538eb7f45cef1e5dd62001b224bdd30843b0d

  • memory/3556-1-0x0000000000600000-0x0000000000700000-memory.dmp

    Filesize

    1024KB

  • memory/3556-2-0x00000000005A0000-0x00000000005B3000-memory.dmp

    Filesize

    76KB

  • memory/3556-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/3556-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/3556-8-0x00000000005A0000-0x00000000005B3000-memory.dmp

    Filesize

    76KB

  • memory/3556-7-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/3600-45-0x00000000021D0000-0x00000000021E0000-memory.dmp

    Filesize

    64KB

  • memory/3600-41-0x00000000021D0000-0x00000000021E0000-memory.dmp

    Filesize

    64KB

  • memory/3600-24-0x00000000021C0000-0x00000000021C6000-memory.dmp

    Filesize

    24KB

  • memory/3600-14-0x0000000000E10000-0x0000000000E25000-memory.dmp

    Filesize

    84KB

  • memory/3600-27-0x00000000021D0000-0x00000000021E0000-memory.dmp

    Filesize

    64KB

  • memory/3600-17-0x0000000000E10000-0x0000000000E25000-memory.dmp

    Filesize

    84KB

  • memory/3600-18-0x0000000000E10000-0x0000000000E25000-memory.dmp

    Filesize

    84KB

  • memory/3600-50-0x00000000021E0000-0x00000000021E5000-memory.dmp

    Filesize

    20KB

  • memory/3600-34-0x00000000021D0000-0x00000000021E0000-memory.dmp

    Filesize

    64KB

  • memory/3600-51-0x0000000007A00000-0x0000000007E0B000-memory.dmp

    Filesize

    4.0MB

  • memory/3600-55-0x00000000021F0000-0x00000000021F7000-memory.dmp

    Filesize

    28KB

  • memory/3600-47-0x00000000021E0000-0x00000000021E5000-memory.dmp

    Filesize

    20KB

  • memory/3600-46-0x00000000021D0000-0x00000000021E0000-memory.dmp

    Filesize

    64KB

  • memory/3600-20-0x0000000002A00000-0x0000000002C0F000-memory.dmp

    Filesize

    2.1MB

  • memory/3600-44-0x00000000021D0000-0x00000000021E0000-memory.dmp

    Filesize

    64KB

  • memory/3600-43-0x00000000021D0000-0x00000000021E0000-memory.dmp

    Filesize

    64KB

  • memory/3600-42-0x00000000021D0000-0x00000000021E0000-memory.dmp

    Filesize

    64KB

  • memory/3600-54-0x0000000007A00000-0x0000000007E0B000-memory.dmp

    Filesize

    4.0MB

  • memory/3600-40-0x00000000021D0000-0x00000000021E0000-memory.dmp

    Filesize

    64KB

  • memory/3600-39-0x00000000021D0000-0x00000000021E0000-memory.dmp

    Filesize

    64KB

  • memory/3600-38-0x00000000021D0000-0x00000000021E0000-memory.dmp

    Filesize

    64KB

  • memory/3600-37-0x00000000021D0000-0x00000000021E0000-memory.dmp

    Filesize

    64KB

  • memory/3600-36-0x00000000021D0000-0x00000000021E0000-memory.dmp

    Filesize

    64KB

  • memory/3600-35-0x00000000021D0000-0x00000000021E0000-memory.dmp

    Filesize

    64KB

  • memory/3600-33-0x00000000021D0000-0x00000000021E0000-memory.dmp

    Filesize

    64KB

  • memory/3600-32-0x00000000021D0000-0x00000000021E0000-memory.dmp

    Filesize

    64KB

  • memory/3600-31-0x00000000021D0000-0x00000000021E0000-memory.dmp

    Filesize

    64KB

  • memory/3600-30-0x00000000021D0000-0x00000000021E0000-memory.dmp

    Filesize

    64KB

  • memory/3600-23-0x0000000002A00000-0x0000000002C0F000-memory.dmp

    Filesize

    2.1MB

  • memory/5832-11-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/5832-12-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/5832-15-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/5832-13-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB