Analysis

  • max time kernel
    189s
  • max time network
    196s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    13/10/2023, 02:48

General

  • Target

    63289f790fe5380ccd80c9aeb3d370bd7d568f467e8a985bd17fb36bc5b62c45_JC.exe

  • Size

    268KB

  • MD5

    1b2cb8d1d82833a67bc3428b3aa44946

  • SHA1

    915236a5564b56fc7610bbd613247f5d42cef643

  • SHA256

    63289f790fe5380ccd80c9aeb3d370bd7d568f467e8a985bd17fb36bc5b62c45

  • SHA512

    d71e01ac1adff851c4ff5775871646c21c48ce41c8e1cd235ae5fea1613e4eb00fc6c85569aff1813c5b0a91c20becdc469e4809e3af2b29879b01a8e3507b5d

  • SSDEEP

    3072:lzOeAt4GTOX6qOjB+AQlNT6NBeSg5i1Xk4v+UwjBIhVaNWYm1T:FOeAsXfeBBQjCeSeS0/N+VThT

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).

  • 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\63289f790fe5380ccd80c9aeb3d370bd7d568f467e8a985bd17fb36bc5b62c45_JC.exe
    "C:\Users\Admin\AppData\Local\Temp\63289f790fe5380ccd80c9aeb3d370bd7d568f467e8a985bd17fb36bc5b62c45_JC.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2676
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\erlknsrz\
      2⤵
        PID:2628
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\xvfgiehn.exe" C:\Windows\SysWOW64\erlknsrz\
        2⤵
          PID:2616
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create erlknsrz binPath= "C:\Windows\SysWOW64\erlknsrz\xvfgiehn.exe /d\"C:\Users\Admin\AppData\Local\Temp\63289f790fe5380ccd80c9aeb3d370bd7d568f467e8a985bd17fb36bc5b62c45_JC.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2836
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description erlknsrz "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2648
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start erlknsrz
          2⤵
          • Launches sc.exe
          PID:2128
        • 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:2536
      • C:\Windows\SysWOW64\erlknsrz\xvfgiehn.exe
        C:\Windows\SysWOW64\erlknsrz\xvfgiehn.exe /d"C:\Users\Admin\AppData\Local\Temp\63289f790fe5380ccd80c9aeb3d370bd7d568f467e8a985bd17fb36bc5b62c45_JC.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3020
        • 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:1920
          • 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:2796

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              14.5MB

              MD5

              22a8defe5ed7f3e8d1b16389818ef465

              SHA1

              0a15944d6b283c0aadebf5fb0d0b2f27c38fbcc1

              SHA256

              5c0b59c56ca9f021b994ac7a34d7d3204455c72253c30cab641d3a411c822df3

              SHA512

              e03771bd69014d8c81885cf855417bb6d96f4fd3be4b5e2d56182c4fc7a61b1160fda05315e0f2a68f50cd486c2782d07907cd96cc911de7fc70159249a093b0

            • C:\Windows\SysWOW64\erlknsrz\xvfgiehn.exe

              Filesize

              14.5MB

              MD5

              22a8defe5ed7f3e8d1b16389818ef465

              SHA1

              0a15944d6b283c0aadebf5fb0d0b2f27c38fbcc1

              SHA256

              5c0b59c56ca9f021b994ac7a34d7d3204455c72253c30cab641d3a411c822df3

              SHA512

              e03771bd69014d8c81885cf855417bb6d96f4fd3be4b5e2d56182c4fc7a61b1160fda05315e0f2a68f50cd486c2782d07907cd96cc911de7fc70159249a093b0

            • memory/1920-39-0x0000000000340000-0x0000000000350000-memory.dmp

              Filesize

              64KB

            • memory/1920-52-0x0000000000350000-0x0000000000355000-memory.dmp

              Filesize

              20KB

            • memory/1920-17-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/1920-40-0x0000000000340000-0x0000000000350000-memory.dmp

              Filesize

              64KB

            • memory/1920-60-0x00000000003A0000-0x00000000003A7000-memory.dmp

              Filesize

              28KB

            • memory/1920-59-0x00000000059B0000-0x0000000005DBB000-memory.dmp

              Filesize

              4.0MB

            • memory/1920-55-0x0000000000350000-0x0000000000355000-memory.dmp

              Filesize

              20KB

            • memory/1920-56-0x00000000059B0000-0x0000000005DBB000-memory.dmp

              Filesize

              4.0MB

            • memory/1920-14-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/1920-51-0x0000000000340000-0x0000000000350000-memory.dmp

              Filesize

              64KB

            • memory/1920-50-0x0000000000340000-0x0000000000350000-memory.dmp

              Filesize

              64KB

            • memory/1920-49-0x0000000000340000-0x0000000000350000-memory.dmp

              Filesize

              64KB

            • memory/1920-48-0x0000000000340000-0x0000000000350000-memory.dmp

              Filesize

              64KB

            • memory/1920-21-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/1920-22-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/1920-24-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/1920-25-0x0000000001A70000-0x0000000001C7F000-memory.dmp

              Filesize

              2.1MB

            • memory/1920-28-0x0000000001A70000-0x0000000001C7F000-memory.dmp

              Filesize

              2.1MB

            • memory/1920-29-0x0000000000170000-0x0000000000176000-memory.dmp

              Filesize

              24KB

            • memory/1920-32-0x0000000000340000-0x0000000000350000-memory.dmp

              Filesize

              64KB

            • memory/1920-35-0x0000000000340000-0x0000000000350000-memory.dmp

              Filesize

              64KB

            • memory/1920-36-0x0000000000340000-0x0000000000350000-memory.dmp

              Filesize

              64KB

            • memory/1920-37-0x0000000000340000-0x0000000000350000-memory.dmp

              Filesize

              64KB

            • memory/1920-38-0x0000000000340000-0x0000000000350000-memory.dmp

              Filesize

              64KB

            • memory/1920-15-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/1920-47-0x0000000000340000-0x0000000000350000-memory.dmp

              Filesize

              64KB

            • memory/1920-41-0x0000000000340000-0x0000000000350000-memory.dmp

              Filesize

              64KB

            • memory/1920-42-0x0000000000340000-0x0000000000350000-memory.dmp

              Filesize

              64KB

            • memory/1920-43-0x0000000000340000-0x0000000000350000-memory.dmp

              Filesize

              64KB

            • memory/1920-44-0x0000000000340000-0x0000000000350000-memory.dmp

              Filesize

              64KB

            • memory/1920-45-0x0000000000340000-0x0000000000350000-memory.dmp

              Filesize

              64KB

            • memory/1920-46-0x0000000000340000-0x0000000000350000-memory.dmp

              Filesize

              64KB

            • memory/2676-2-0x0000000000220000-0x0000000000233000-memory.dmp

              Filesize

              76KB

            • memory/2676-1-0x00000000007B0000-0x00000000008B0000-memory.dmp

              Filesize

              1024KB

            • memory/2676-4-0x0000000000400000-0x0000000000711000-memory.dmp

              Filesize

              3.1MB

            • memory/2676-6-0x0000000000400000-0x0000000000711000-memory.dmp

              Filesize

              3.1MB

            • memory/2676-9-0x0000000000220000-0x0000000000233000-memory.dmp

              Filesize

              76KB

            • memory/2676-8-0x00000000007B0000-0x00000000008B0000-memory.dmp

              Filesize

              1024KB

            • memory/2676-7-0x0000000000400000-0x0000000000711000-memory.dmp

              Filesize

              3.1MB

            • memory/2796-64-0x0000000000210000-0x0000000000301000-memory.dmp

              Filesize

              964KB

            • memory/2796-65-0x0000000000210000-0x0000000000301000-memory.dmp

              Filesize

              964KB

            • memory/2796-73-0x0000000000210000-0x0000000000301000-memory.dmp

              Filesize

              964KB

            • memory/2796-75-0x0000000000210000-0x0000000000301000-memory.dmp

              Filesize

              964KB

            • memory/2796-74-0x0000000000210000-0x0000000000301000-memory.dmp

              Filesize

              964KB

            • memory/2796-76-0x0000000000210000-0x0000000000301000-memory.dmp

              Filesize

              964KB

            • memory/2796-77-0x0000000000210000-0x0000000000301000-memory.dmp

              Filesize

              964KB

            • memory/2796-78-0x0000000000210000-0x0000000000301000-memory.dmp

              Filesize

              964KB

            • memory/3020-19-0x0000000000400000-0x0000000000711000-memory.dmp

              Filesize

              3.1MB

            • memory/3020-12-0x0000000000230000-0x0000000000330000-memory.dmp

              Filesize

              1024KB

            • memory/3020-13-0x0000000000400000-0x0000000000711000-memory.dmp

              Filesize

              3.1MB