Analysis

  • max time kernel
    142s
  • max time network
    150s
  • platform
    windows10_x64
  • resource
    win10-20220414-en
  • submitted
    05-06-2022 15:26

General

  • Target

    d764faeb00df45fb6896a7a0d8564cabc237c80541bb737703a143527b9d5885.exe

  • Size

    265KB

  • MD5

    de9efe710505ba1c853be385bd87bcae

  • SHA1

    8b4bfd41b6908ea6ff157fca4770c7788d5f8d36

  • SHA256

    d764faeb00df45fb6896a7a0d8564cabc237c80541bb737703a143527b9d5885

  • SHA512

    b8344049b71aa49358923191d200608d467ad56452b7dd93a671537ebd3aa698df38231db6dcded3c934b644c1c140a88a8e5a9c18af3a8cdc0457bf96df1c13

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\d764faeb00df45fb6896a7a0d8564cabc237c80541bb737703a143527b9d5885.exe
    "C:\Users\Admin\AppData\Local\Temp\d764faeb00df45fb6896a7a0d8564cabc237c80541bb737703a143527b9d5885.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3932
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\pwsdzmbo\
      2⤵
        PID:1988
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\enphfkvw.exe" C:\Windows\SysWOW64\pwsdzmbo\
        2⤵
          PID:1772
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create pwsdzmbo binPath= "C:\Windows\SysWOW64\pwsdzmbo\enphfkvw.exe /d\"C:\Users\Admin\AppData\Local\Temp\d764faeb00df45fb6896a7a0d8564cabc237c80541bb737703a143527b9d5885.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2928
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description pwsdzmbo "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2148
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start pwsdzmbo
          2⤵
          • Launches sc.exe
          PID:1144
        • 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:2336
      • C:\Windows\SysWOW64\pwsdzmbo\enphfkvw.exe
        C:\Windows\SysWOW64\pwsdzmbo\enphfkvw.exe /d"C:\Users\Admin\AppData\Local\Temp\d764faeb00df45fb6896a7a0d8564cabc237c80541bb737703a143527b9d5885.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3496
        • 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:2532
          • 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:4036

      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\enphfkvw.exe
        Filesize

        12.4MB

        MD5

        96cf509abce7b564fff4e33557825f0c

        SHA1

        0d1d2ac2ebc5c1661d2fd23d13a9025652fde02a

        SHA256

        42114da53c99aeb4a791bfac6c2cdee9200d1db2e94d9265596a203cb740766e

        SHA512

        f32cbd30eaeb6bc96825ec1f369649560298e94ca53b8f07dd7c124ee4aaeeb5a84870ba753f092413580977de197f554d8e88335608650fe8386eb4ba935083

      • C:\Windows\SysWOW64\pwsdzmbo\enphfkvw.exe
        Filesize

        12.4MB

        MD5

        96cf509abce7b564fff4e33557825f0c

        SHA1

        0d1d2ac2ebc5c1661d2fd23d13a9025652fde02a

        SHA256

        42114da53c99aeb4a791bfac6c2cdee9200d1db2e94d9265596a203cb740766e

        SHA512

        f32cbd30eaeb6bc96825ec1f369649560298e94ca53b8f07dd7c124ee4aaeeb5a84870ba753f092413580977de197f554d8e88335608650fe8386eb4ba935083

      • memory/1144-193-0x0000000000000000-mapping.dmp
      • memory/1772-177-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/1772-178-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/1772-173-0x0000000000000000-mapping.dmp
      • memory/1772-174-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/1772-176-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/1772-175-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/1988-170-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/1988-172-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/1988-171-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/1988-168-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/1988-169-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/1988-167-0x0000000000000000-mapping.dmp
      • memory/2148-185-0x0000000000000000-mapping.dmp
      • memory/2148-186-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/2148-187-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/2148-188-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/2336-213-0x0000000000000000-mapping.dmp
      • memory/2532-327-0x0000000000929A6B-mapping.dmp
      • memory/2532-424-0x0000000000920000-0x0000000000935000-memory.dmp
        Filesize

        84KB

      • memory/2532-487-0x0000000000920000-0x0000000000935000-memory.dmp
        Filesize

        84KB

      • memory/2928-184-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/2928-180-0x0000000000000000-mapping.dmp
      • memory/2928-181-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/2928-182-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/2928-183-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3496-322-0x0000000002E90000-0x0000000002FDA000-memory.dmp
        Filesize

        1.3MB

      • memory/3496-323-0x0000000002DC0000-0x0000000002E6E000-memory.dmp
        Filesize

        696KB

      • memory/3496-332-0x0000000002E90000-0x0000000002EA5000-memory.dmp
        Filesize

        84KB

      • memory/3496-338-0x0000000000400000-0x0000000002DB9000-memory.dmp
        Filesize

        41.7MB

      • memory/3496-486-0x0000000000400000-0x0000000002DB9000-memory.dmp
        Filesize

        41.7MB

      • memory/3932-138-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-139-0x00000000049D0000-0x00000000049E3000-memory.dmp
        Filesize

        76KB

      • memory/3932-152-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-153-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-154-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-155-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-156-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-157-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-158-0x0000000000400000-0x0000000002DB9000-memory.dmp
        Filesize

        41.7MB

      • memory/3932-159-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-160-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-161-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-162-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-163-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-164-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-165-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-166-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-150-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-149-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-148-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-147-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-146-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-145-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-144-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-143-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-142-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-141-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-151-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-140-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-116-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-137-0x0000000002DC0000-0x0000000002F0A000-memory.dmp
        Filesize

        1.3MB

      • memory/3932-136-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-135-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-134-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-133-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-132-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-131-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-129-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-130-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-128-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-127-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-215-0x00000000049D0000-0x00000000049E3000-memory.dmp
        Filesize

        76KB

      • memory/3932-227-0x0000000000400000-0x0000000002DB9000-memory.dmp
        Filesize

        41.7MB

      • memory/3932-126-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-125-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-124-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-122-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-121-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-120-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-119-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-118-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/3932-117-0x00000000772B0000-0x000000007743E000-memory.dmp
        Filesize

        1.6MB

      • memory/4036-522-0x000000000309259C-mapping.dmp