Analysis

  • max time kernel
    148s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20231023-en
  • resource tags

    arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
  • submitted
    06/11/2023, 10:05

General

  • Target

    abb89870a6ffac63572b4f2026957ee5c75eaeb17db0eec61629333da244ba44.exe

  • Size

    256KB

  • MD5

    fef3091059af5ae452cd4554a7fb2f31

  • SHA1

    6716795202f0eb637e61b5c2e12561e4587b322d

  • SHA256

    abb89870a6ffac63572b4f2026957ee5c75eaeb17db0eec61629333da244ba44

  • SHA512

    f895a12bf19419bdc0392b215d135acf2acd0479ca632b807529a68c52cfb60603bb9a462c380d2c15031819e87db6ce13cc987ac385891dabc31760401e6a6b

  • SSDEEP

    3072:yr992I1yxYhjZjXLR1EalWmPEDUvz64IeF+GA52A26Q3GLeJig/oGOUZ:TI1yK1LRuaQmP2+B9FXRGKJ1o

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 7 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).

  • GoLang User-Agent 1 IoCs

    Uses default user-agent string defined by GoLang HTTP packages.

  • 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\abb89870a6ffac63572b4f2026957ee5c75eaeb17db0eec61629333da244ba44.exe
    "C:\Users\Admin\AppData\Local\Temp\abb89870a6ffac63572b4f2026957ee5c75eaeb17db0eec61629333da244ba44.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2040
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\adfkqolx\
      2⤵
        PID:2964
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ubezyssm.exe" C:\Windows\SysWOW64\adfkqolx\
        2⤵
          PID:2816
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create adfkqolx binPath= "C:\Windows\SysWOW64\adfkqolx\ubezyssm.exe /d\"C:\Users\Admin\AppData\Local\Temp\abb89870a6ffac63572b4f2026957ee5c75eaeb17db0eec61629333da244ba44.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2128
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description adfkqolx "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2844
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start adfkqolx
          2⤵
          • Launches sc.exe
          PID:1596
        • 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:2728
      • C:\Windows\SysWOW64\adfkqolx\ubezyssm.exe
        C:\Windows\SysWOW64\adfkqolx\ubezyssm.exe /d"C:\Users\Admin\AppData\Local\Temp\abb89870a6ffac63572b4f2026957ee5c75eaeb17db0eec61629333da244ba44.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2328
        • 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:2508
          • 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:2024

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              11.0MB

              MD5

              8c04cf0a093f71ca6a7d3251d2279eb4

              SHA1

              aab446e021559778c32c0927897ffbc41456531b

              SHA256

              98a36c542ff76013efbbb59b61e98ab1818095546f3cbb1364354a000146ff43

              SHA512

              4fd9bc7aaa09588b3b3d432e6cdc37e8eb7c0fa65fb9191680962487d35e7489ac95fb5f45a69b5dfeb146c01cac4c34b9de24ba1cf6af19352c53e981083152

            • C:\Windows\SysWOW64\adfkqolx\ubezyssm.exe

              Filesize

              11.0MB

              MD5

              8c04cf0a093f71ca6a7d3251d2279eb4

              SHA1

              aab446e021559778c32c0927897ffbc41456531b

              SHA256

              98a36c542ff76013efbbb59b61e98ab1818095546f3cbb1364354a000146ff43

              SHA512

              4fd9bc7aaa09588b3b3d432e6cdc37e8eb7c0fa65fb9191680962487d35e7489ac95fb5f45a69b5dfeb146c01cac4c34b9de24ba1cf6af19352c53e981083152

            • memory/2024-75-0x0000000000100000-0x00000000001F1000-memory.dmp

              Filesize

              964KB

            • memory/2024-73-0x0000000000100000-0x00000000001F1000-memory.dmp

              Filesize

              964KB

            • memory/2024-63-0x0000000000100000-0x00000000001F1000-memory.dmp

              Filesize

              964KB

            • memory/2024-65-0x0000000000100000-0x00000000001F1000-memory.dmp

              Filesize

              964KB

            • memory/2024-69-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2024-74-0x0000000000100000-0x00000000001F1000-memory.dmp

              Filesize

              964KB

            • memory/2024-76-0x0000000000100000-0x00000000001F1000-memory.dmp

              Filesize

              964KB

            • memory/2024-78-0x0000000000100000-0x00000000001F1000-memory.dmp

              Filesize

              964KB

            • memory/2024-77-0x0000000000100000-0x00000000001F1000-memory.dmp

              Filesize

              964KB

            • memory/2040-2-0x0000000000220000-0x0000000000233000-memory.dmp

              Filesize

              76KB

            • memory/2040-4-0x0000000000400000-0x00000000007CA000-memory.dmp

              Filesize

              3.8MB

            • memory/2040-8-0x0000000000220000-0x0000000000233000-memory.dmp

              Filesize

              76KB

            • memory/2040-7-0x0000000000400000-0x00000000007CA000-memory.dmp

              Filesize

              3.8MB

            • memory/2040-1-0x00000000008B0000-0x00000000009B0000-memory.dmp

              Filesize

              1024KB

            • memory/2328-11-0x0000000000400000-0x00000000007CA000-memory.dmp

              Filesize

              3.8MB

            • memory/2328-18-0x0000000000400000-0x00000000007CA000-memory.dmp

              Filesize

              3.8MB

            • memory/2328-10-0x00000000002B0000-0x00000000003B0000-memory.dmp

              Filesize

              1024KB

            • memory/2508-38-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2508-48-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2508-35-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2508-36-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2508-37-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2508-31-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2508-39-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2508-40-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2508-41-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2508-42-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2508-43-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2508-44-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2508-45-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2508-46-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2508-47-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2508-34-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2508-49-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2508-50-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2508-51-0x0000000000100000-0x0000000000105000-memory.dmp

              Filesize

              20KB

            • memory/2508-54-0x0000000000100000-0x0000000000105000-memory.dmp

              Filesize

              20KB

            • memory/2508-55-0x0000000005400000-0x000000000580B000-memory.dmp

              Filesize

              4.0MB

            • memory/2508-58-0x0000000005400000-0x000000000580B000-memory.dmp

              Filesize

              4.0MB

            • memory/2508-59-0x0000000000240000-0x0000000000247000-memory.dmp

              Filesize

              28KB

            • memory/2508-28-0x00000000000A0000-0x00000000000A6000-memory.dmp

              Filesize

              24KB

            • memory/2508-27-0x0000000001980000-0x0000000001B8F000-memory.dmp

              Filesize

              2.1MB

            • memory/2508-24-0x0000000001980000-0x0000000001B8F000-memory.dmp

              Filesize

              2.1MB

            • memory/2508-23-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2508-21-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2508-20-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2508-15-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2508-12-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2508-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB