Analysis

  • max time kernel
    149s
  • max time network
    156s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    05-09-2024 01:42

General

  • Target

    2d49ab2f33264eb29d38ab91a7c6dc193a6a0fa65260b0295b1123c18612d7c5.exe

  • Size

    11.8MB

  • MD5

    b32f61c5c47e9473cf4a0ac98e8143c1

  • SHA1

    d6de6d48a87510f4ba641785e56311a4732dcf26

  • SHA256

    2d49ab2f33264eb29d38ab91a7c6dc193a6a0fa65260b0295b1123c18612d7c5

  • SHA512

    cc0cc0499616d0277920597b7beb8ee0b53d99c9e8d8c827c6e2244dc9a98785a848f17368f6991d362f9b6f76cd3a1f7ebcc31e99c34097c458872336ab5c21

  • SSDEEP

    6144:9c6OZDisWsD0Td2HJxO+m8PuG1R4WnWjrsaz:91OZDisvwdaxO0PuG1R4CWs

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 7 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2d49ab2f33264eb29d38ab91a7c6dc193a6a0fa65260b0295b1123c18612d7c5.exe
    "C:\Users\Admin\AppData\Local\Temp\2d49ab2f33264eb29d38ab91a7c6dc193a6a0fa65260b0295b1123c18612d7c5.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2540
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bnutcbnw\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2384
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jvdagtzx.exe" C:\Windows\SysWOW64\bnutcbnw\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1980
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create bnutcbnw binPath= "C:\Windows\SysWOW64\bnutcbnw\jvdagtzx.exe /d\"C:\Users\Admin\AppData\Local\Temp\2d49ab2f33264eb29d38ab91a7c6dc193a6a0fa65260b0295b1123c18612d7c5.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2368
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description bnutcbnw "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2816
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start bnutcbnw
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3004
    • 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:2644
  • C:\Windows\SysWOW64\bnutcbnw\jvdagtzx.exe
    C:\Windows\SysWOW64\bnutcbnw\jvdagtzx.exe /d"C:\Users\Admin\AppData\Local\Temp\2d49ab2f33264eb29d38ab91a7c6dc193a6a0fa65260b0295b1123c18612d7c5.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3000
    • 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:2780

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    12.3MB

    MD5

    ca75aed3d5a70f14c63d2616b573bb74

    SHA1

    4b27332d9e901cfa61a32e96e64bff1ebcd6ce09

    SHA256

    99cdfafd7f532f87951a79a74a90b9f10dc8a5ffcb4915298d9be610ab217ea4

    SHA512

    d02ad32803e325411b9a0f30df718b9f0120669df9ad9243f8c8095f7cbbc868eb299be693be709b7b66e6ed5cc3805764303a0d4607e4b14fde3c6cc9fea254

  • memory/2540-14-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

  • memory/2540-2-0x00000000001B0000-0x00000000001C3000-memory.dmp

    Filesize

    76KB

  • memory/2540-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2540-1-0x00000000002F0000-0x00000000003F0000-memory.dmp

    Filesize

    1024KB

  • memory/2540-15-0x00000000001B0000-0x00000000001C3000-memory.dmp

    Filesize

    76KB

  • memory/2540-16-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2780-55-0x00000000000D0000-0x00000000000D7000-memory.dmp

    Filesize

    28KB

  • memory/2780-45-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2780-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2780-27-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2780-17-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2780-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2780-23-0x0000000001930000-0x0000000001B3F000-memory.dmp

    Filesize

    2.1MB

  • memory/2780-20-0x0000000001930000-0x0000000001B3F000-memory.dmp

    Filesize

    2.1MB

  • memory/2780-24-0x00000000000A0000-0x00000000000A6000-memory.dmp

    Filesize

    24KB

  • memory/2780-50-0x00000000000C0000-0x00000000000C5000-memory.dmp

    Filesize

    20KB

  • memory/2780-54-0x0000000005520000-0x000000000592B000-memory.dmp

    Filesize

    4.0MB

  • memory/2780-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2780-51-0x0000000005520000-0x000000000592B000-memory.dmp

    Filesize

    4.0MB

  • memory/2780-47-0x00000000000C0000-0x00000000000C5000-memory.dmp

    Filesize

    20KB

  • memory/2780-46-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2780-8-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2780-44-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2780-43-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2780-42-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2780-41-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2780-40-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2780-39-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2780-38-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2780-37-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2780-36-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2780-35-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2780-34-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2780-33-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2780-32-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2780-31-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2780-30-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/3000-13-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB