Analysis

  • max time kernel
    291s
  • max time network
    304s
  • platform
    windows7_x64
  • resource
    win7-20231023-en
  • resource tags

    arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
  • submitted
    06/11/2023, 04:56

General

  • Target

    7291a205dba93db221ee6d6da61d00580f9ddbaf9424465522138b6cb1bbc1b7.exe

  • Size

    262KB

  • MD5

    81f5904645e44483a57226ab60e0390b

  • SHA1

    0bd97534d23998b6d554b48bddd0015d199808ec

  • SHA256

    7291a205dba93db221ee6d6da61d00580f9ddbaf9424465522138b6cb1bbc1b7

  • SHA512

    5403b05a65105351fa5b6bc351b3613f930d16bbc0507045a340282029fdc688234fe3f92ef15fcdc9011650a3f96533f9254348bcf33159f381e8914abf281e

  • SSDEEP

    3072:pFzu3GMDmWLo3NrmuvLLCRpKbm/EJx9teHFKe0fk02q5XI7lVEaP:zzu2MqWLo9rmCXCR38biHF080VIjt

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 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7291a205dba93db221ee6d6da61d00580f9ddbaf9424465522138b6cb1bbc1b7.exe
    "C:\Users\Admin\AppData\Local\Temp\7291a205dba93db221ee6d6da61d00580f9ddbaf9424465522138b6cb1bbc1b7.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2096
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\mmterkqe\
      2⤵
        PID:2332
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gaasvfjv.exe" C:\Windows\SysWOW64\mmterkqe\
        2⤵
          PID:2636
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create mmterkqe binPath= "C:\Windows\SysWOW64\mmterkqe\gaasvfjv.exe /d\"C:\Users\Admin\AppData\Local\Temp\7291a205dba93db221ee6d6da61d00580f9ddbaf9424465522138b6cb1bbc1b7.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2684
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description mmterkqe "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2724
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start mmterkqe
          2⤵
          • Launches sc.exe
          PID:2788
        • 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:2520
      • C:\Windows\SysWOW64\mmterkqe\gaasvfjv.exe
        C:\Windows\SysWOW64\mmterkqe\gaasvfjv.exe /d"C:\Users\Admin\AppData\Local\Temp\7291a205dba93db221ee6d6da61d00580f9ddbaf9424465522138b6cb1bbc1b7.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2524
        • 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:2528
          • 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:2420

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              10.8MB

              MD5

              3638fc41feede526ed89049f221a98ea

              SHA1

              f565df3ed6b86f3cca39749f713e650f041c7460

              SHA256

              c7a10d3c499ff59fc7587d000f41695fda0b68a50cc6b94d70403024b3780e71

              SHA512

              6469c97163925dfc7661f75c1c91b29abf0b04a278e733f0b56dd8a5340b30e50bcc0cc955145af2897fe8f0e2f282ddad969875d973153c64f3e51c489deee5

            • C:\Windows\SysWOW64\mmterkqe\gaasvfjv.exe

              Filesize

              10.8MB

              MD5

              3638fc41feede526ed89049f221a98ea

              SHA1

              f565df3ed6b86f3cca39749f713e650f041c7460

              SHA256

              c7a10d3c499ff59fc7587d000f41695fda0b68a50cc6b94d70403024b3780e71

              SHA512

              6469c97163925dfc7661f75c1c91b29abf0b04a278e733f0b56dd8a5340b30e50bcc0cc955145af2897fe8f0e2f282ddad969875d973153c64f3e51c489deee5

            • memory/2096-1-0x0000000000940000-0x0000000000A40000-memory.dmp

              Filesize

              1024KB

            • memory/2096-2-0x0000000000220000-0x0000000000233000-memory.dmp

              Filesize

              76KB

            • memory/2096-4-0x0000000000400000-0x00000000008A7000-memory.dmp

              Filesize

              4.7MB

            • memory/2096-8-0x0000000000400000-0x00000000008A7000-memory.dmp

              Filesize

              4.7MB

            • memory/2096-10-0x0000000000940000-0x0000000000A40000-memory.dmp

              Filesize

              1024KB

            • memory/2096-9-0x0000000000220000-0x0000000000233000-memory.dmp

              Filesize

              76KB

            • memory/2420-77-0x0000000000190000-0x0000000000281000-memory.dmp

              Filesize

              964KB

            • memory/2420-79-0x0000000000190000-0x0000000000281000-memory.dmp

              Filesize

              964KB

            • memory/2420-78-0x0000000000190000-0x0000000000281000-memory.dmp

              Filesize

              964KB

            • memory/2420-76-0x0000000000190000-0x0000000000281000-memory.dmp

              Filesize

              964KB

            • memory/2420-74-0x0000000000190000-0x0000000000281000-memory.dmp

              Filesize

              964KB

            • memory/2420-75-0x0000000000190000-0x0000000000281000-memory.dmp

              Filesize

              964KB

            • memory/2420-66-0x0000000000190000-0x0000000000281000-memory.dmp

              Filesize

              964KB

            • memory/2420-64-0x0000000000190000-0x0000000000281000-memory.dmp

              Filesize

              964KB

            • memory/2524-12-0x0000000000400000-0x00000000008A7000-memory.dmp

              Filesize

              4.7MB

            • memory/2524-11-0x0000000000930000-0x0000000000A30000-memory.dmp

              Filesize

              1024KB

            • memory/2524-17-0x0000000000400000-0x00000000008A7000-memory.dmp

              Filesize

              4.7MB

            • memory/2528-39-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2528-49-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2528-32-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2528-35-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2528-36-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2528-37-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2528-38-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2528-28-0x0000000001930000-0x0000000001B3F000-memory.dmp

              Filesize

              2.1MB

            • memory/2528-40-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2528-41-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2528-42-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2528-43-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2528-44-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2528-45-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2528-46-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2528-47-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2528-48-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2528-29-0x00000000000E0000-0x00000000000E6000-memory.dmp

              Filesize

              24KB

            • memory/2528-50-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2528-51-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2528-52-0x00000000001F0000-0x00000000001F5000-memory.dmp

              Filesize

              20KB

            • memory/2528-55-0x00000000001F0000-0x00000000001F5000-memory.dmp

              Filesize

              20KB

            • memory/2528-56-0x0000000005450000-0x000000000585B000-memory.dmp

              Filesize

              4.0MB

            • memory/2528-59-0x0000000005450000-0x000000000585B000-memory.dmp

              Filesize

              4.0MB

            • memory/2528-60-0x0000000000340000-0x0000000000347000-memory.dmp

              Filesize

              28KB

            • memory/2528-25-0x0000000001930000-0x0000000001B3F000-memory.dmp

              Filesize

              2.1MB

            • memory/2528-24-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2528-22-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2528-20-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2528-21-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2528-13-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2528-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2528-16-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB