Analysis

  • max time kernel
    146s
  • max time network
    146s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    03-09-2024 10:23

General

  • Target

    48e0ce9cfa0bd0951aaf6cff66593631c06472384d593641fe76854c7d0b3f82.exe

  • Size

    11.2MB

  • MD5

    ffdceebfd66c68c128cd5c7e349881b5

  • SHA1

    19e173e67dea7a78b95bce015cf4a58dc2f976c7

  • SHA256

    48e0ce9cfa0bd0951aaf6cff66593631c06472384d593641fe76854c7d0b3f82

  • SHA512

    be958ffd1343a1e1c06ea68a29fa6861c6a1762a74f227190c7d2597a0a64f9926527491b8a11835975d6bf7743359423c9dbf090523d9585c7d1afb623acbd8

  • SSDEEP

    49152:wNbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb7:w

Malware Config

Extracted

Family

tofsee

C2

defeatwax.ru

refabyd.info

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
  • 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.

  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\48e0ce9cfa0bd0951aaf6cff66593631c06472384d593641fe76854c7d0b3f82.exe
    "C:\Users\Admin\AppData\Local\Temp\48e0ce9cfa0bd0951aaf6cff66593631c06472384d593641fe76854c7d0b3f82.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2696
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bclfvlov\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2684
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\tayjojxl.exe" C:\Windows\SysWOW64\bclfvlov\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2804
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create bclfvlov binPath= "C:\Windows\SysWOW64\bclfvlov\tayjojxl.exe /d\"C:\Users\Admin\AppData\Local\Temp\48e0ce9cfa0bd0951aaf6cff66593631c06472384d593641fe76854c7d0b3f82.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2564
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description bclfvlov "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2800
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start bclfvlov
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2776
    • 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:2612
  • C:\Windows\SysWOW64\bclfvlov\tayjojxl.exe
    C:\Windows\SysWOW64\bclfvlov\tayjojxl.exe /d"C:\Users\Admin\AppData\Local\Temp\48e0ce9cfa0bd0951aaf6cff66593631c06472384d593641fe76854c7d0b3f82.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2556
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Windows security bypass
      • Sets service image path in registry
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:1664

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    12.4MB

    MD5

    c1f31314116e015bd52ad1d58a3a40ca

    SHA1

    68880c062dcd594f5a5807ded014d2caea0e4752

    SHA256

    f3e068467030002b429df4b450a8eaea2d44285538986ed9ee23909df2e74779

    SHA512

    3dae8020d5f30b1231b71cc9bda37b0b11712316e96250b47d6c815397d78b46c9d9c3ad975dc378f85c4dca60a4fcaa87ccfed277debf5556603e598be22303

  • memory/1664-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/1664-16-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/1664-14-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/1664-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/1664-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2556-17-0x0000000000400000-0x0000000002B90000-memory.dmp

    Filesize

    39.6MB

  • memory/2696-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2696-1-0x0000000002C50000-0x0000000002D50000-memory.dmp

    Filesize

    1024KB

  • memory/2696-8-0x0000000000400000-0x0000000002B90000-memory.dmp

    Filesize

    39.6MB

  • memory/2696-10-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2696-9-0x0000000000020000-0x0000000000033000-memory.dmp

    Filesize

    76KB

  • memory/2696-2-0x0000000000020000-0x0000000000033000-memory.dmp

    Filesize

    76KB