Analysis

  • max time kernel
    120s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    14-09-2024 11:33

General

  • Target

    95b628b19f244451d5f69a864e24b260N.exe

  • Size

    379KB

  • MD5

    95b628b19f244451d5f69a864e24b260

  • SHA1

    a478f681098713f959d89361c09c14d02552e6ed

  • SHA256

    c36fbe6dd8f9632176f3927fca2c2e674a5929d33e7d245f1053bf69ec2b11a9

  • SHA512

    f2755be22ecdb5aa22ac741fd4bb4d1f1fded762106dd04e6926771ba2ceb19414228fab882b609504ece92583084634ff10b1febdcecd26ac70ac40a1aa7caa

  • SSDEEP

    3072:V8XBk++uc5jv/MfYABOMHfa80LxDtamgthsGiOTBILGvmYX0ZSZn0YTwsu9f:mBknHMfYAB1aLLMhsdOdILGmM92f

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.

  • Windows security bypass 2 TTPs 1 IoCs
  • Creates new service(s) 2 TTPs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • 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 6 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\95b628b19f244451d5f69a864e24b260N.exe
    "C:\Users\Admin\AppData\Local\Temp\95b628b19f244451d5f69a864e24b260N.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2140
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zshiaygx\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2772
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jdigbebd.exe" C:\Windows\SysWOW64\zshiaygx\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2700
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create zshiaygx binPath= "C:\Windows\SysWOW64\zshiaygx\jdigbebd.exe /d\"C:\Users\Admin\AppData\Local\Temp\95b628b19f244451d5f69a864e24b260N.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2736
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description zshiaygx "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2868
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start zshiaygx
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2712
    • 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:2588
  • C:\Windows\SysWOW64\zshiaygx\jdigbebd.exe
    C:\Windows\SysWOW64\zshiaygx\jdigbebd.exe /d"C:\Users\Admin\AppData\Local\Temp\95b628b19f244451d5f69a864e24b260N.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2540
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Windows security bypass
      • 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:2612

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    14.5MB

    MD5

    ad4448b99c494ac1b9f71c6e75e6d873

    SHA1

    80b3af8e8b4056edb60bd07902ac0b33dd9e4022

    SHA256

    00b992e460b34d8e4d7b2fee49558df47717065d2fc9414b67b0ffa18d79d531

    SHA512

    1cd8d18b7e9ec3388b7d5a1c25d8ddcde9ba52c909703ba54614fdc12a853e93dc18f63226557da3150b20938abe841ce4f296a62d22004d90b16c7bd7b4eb21

  • memory/2140-15-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/2140-2-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/2140-4-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2140-1-0x0000000002630000-0x0000000002730000-memory.dmp

    Filesize

    1024KB

  • memory/2140-14-0x0000000000400000-0x0000000002477000-memory.dmp

    Filesize

    32.5MB

  • memory/2140-17-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2140-16-0x0000000002630000-0x0000000002730000-memory.dmp

    Filesize

    1024KB

  • memory/2540-13-0x0000000000400000-0x0000000002477000-memory.dmp

    Filesize

    32.5MB

  • memory/2612-35-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2612-34-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2612-8-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2612-19-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2612-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2612-28-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2612-25-0x00000000000B0000-0x00000000000B6000-memory.dmp

    Filesize

    24KB

  • memory/2612-24-0x0000000001960000-0x0000000001B6F000-memory.dmp

    Filesize

    2.1MB

  • memory/2612-21-0x0000000001960000-0x0000000001B6F000-memory.dmp

    Filesize

    2.1MB

  • memory/2612-31-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2612-33-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2612-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2612-36-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2612-37-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2612-32-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2612-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2612-38-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2612-56-0x00000000001D0000-0x00000000001D7000-memory.dmp

    Filesize

    28KB

  • memory/2612-55-0x0000000005440000-0x000000000584B000-memory.dmp

    Filesize

    4.0MB

  • memory/2612-52-0x0000000005440000-0x000000000584B000-memory.dmp

    Filesize

    4.0MB

  • memory/2612-51-0x00000000001C0000-0x00000000001C5000-memory.dmp

    Filesize

    20KB

  • memory/2612-48-0x00000000001C0000-0x00000000001C5000-memory.dmp

    Filesize

    20KB

  • memory/2612-47-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2612-46-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2612-45-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2612-44-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2612-43-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2612-42-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2612-41-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2612-40-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2612-39-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB