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
    28-03-2023 02:33

General

  • Target

    file.exe

  • Size

    250KB

  • MD5

    26f7d2732dc1d76aab1a6492f7f106ee

  • SHA1

    56ba7b43e686228f0aba17f3e8c6faad01efbd91

  • SHA256

    5587bfaf4c6d7b43361c99427fd1d4004d6c4c366be156dac0394733893561d1

  • SHA512

    5e8a066c512ceccab071dbad8a6eafaa76de89969e762f6ef1e6373ee32e7bb8516ba9518a4c1918711221ca7ec7dc3a6afdc10933f342659411ca30c9ca880d

  • SSDEEP

    3072:LZ4aHyaN3EldLhSfz22RsvJxW9m+niPZhDUv7dFEIFu2/bH+lev4Qj5EvLwc7w:KOyasdLA7sJ+i8vZFy8L+lDG

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\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1972
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\cncrsqqq\
      2⤵
        PID:1976
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\crjqvtyq.exe" C:\Windows\SysWOW64\cncrsqqq\
        2⤵
          PID:1800
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create cncrsqqq binPath= "C:\Windows\SysWOW64\cncrsqqq\crjqvtyq.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:752
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description cncrsqqq "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2028
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start cncrsqqq
          2⤵
          • Launches sc.exe
          PID:1136
        • 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:1068
      • C:\Windows\SysWOW64\cncrsqqq\crjqvtyq.exe
        C:\Windows\SysWOW64\cncrsqqq\crjqvtyq.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:812
        • 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:1748
          • 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:1904

      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\crjqvtyq.exe
        Filesize

        13.8MB

        MD5

        6a6c7b04b4427deb10cad8690f29fd6e

        SHA1

        1eefd286ad01b2e97516934dcef8f6e136458e7a

        SHA256

        9a3982d27c29556e1f2e29bb99159b2bf896cda7d7f5bab23de2b19254fdcbca

        SHA512

        40ed4f5ef29921e9b2c5a857ddb503a83f74305c106ac38372a44bc999e79a3dab31c8d158bb40f81a0cf678089c2c1f1eaaa8c21911afa33be85679c873d07b

      • C:\Windows\SysWOW64\cncrsqqq\crjqvtyq.exe
        Filesize

        13.8MB

        MD5

        6a6c7b04b4427deb10cad8690f29fd6e

        SHA1

        1eefd286ad01b2e97516934dcef8f6e136458e7a

        SHA256

        9a3982d27c29556e1f2e29bb99159b2bf896cda7d7f5bab23de2b19254fdcbca

        SHA512

        40ed4f5ef29921e9b2c5a857ddb503a83f74305c106ac38372a44bc999e79a3dab31c8d158bb40f81a0cf678089c2c1f1eaaa8c21911afa33be85679c873d07b

      • memory/812-65-0x0000000000400000-0x0000000000701000-memory.dmp
        Filesize

        3.0MB

      • memory/1748-88-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/1748-61-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/1748-62-0x00000000000D0000-0x00000000000E5000-memory.dmp
        Filesize

        84KB

      • memory/1748-90-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/1748-89-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/1748-68-0x00000000000D0000-0x00000000000E5000-memory.dmp
        Filesize

        84KB

      • memory/1748-67-0x00000000000D0000-0x00000000000E5000-memory.dmp
        Filesize

        84KB

      • memory/1748-69-0x00000000000D0000-0x00000000000E5000-memory.dmp
        Filesize

        84KB

      • memory/1748-71-0x00000000018E0000-0x0000000001AEF000-memory.dmp
        Filesize

        2.1MB

      • memory/1748-74-0x00000000018E0000-0x0000000001AEF000-memory.dmp
        Filesize

        2.1MB

      • memory/1748-75-0x0000000000080000-0x0000000000086000-memory.dmp
        Filesize

        24KB

      • memory/1748-78-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/1748-82-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/1748-81-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/1748-83-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/1748-91-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/1748-85-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/1748-87-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/1748-86-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/1748-110-0x00000000000D0000-0x00000000000E5000-memory.dmp
        Filesize

        84KB

      • memory/1748-106-0x00000000001F0000-0x00000000001F7000-memory.dmp
        Filesize

        28KB

      • memory/1748-60-0x00000000000D0000-0x00000000000E5000-memory.dmp
        Filesize

        84KB

      • memory/1748-84-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/1748-92-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/1748-93-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/1748-94-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/1748-95-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/1748-96-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/1748-97-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/1748-98-0x00000000001A0000-0x00000000001A5000-memory.dmp
        Filesize

        20KB

      • memory/1748-101-0x00000000001A0000-0x00000000001A5000-memory.dmp
        Filesize

        20KB

      • memory/1748-102-0x0000000005940000-0x0000000005D4B000-memory.dmp
        Filesize

        4.0MB

      • memory/1748-105-0x0000000005940000-0x0000000005D4B000-memory.dmp
        Filesize

        4.0MB

      • memory/1904-123-0x0000000000290000-0x0000000000381000-memory.dmp
        Filesize

        964KB

      • memory/1904-111-0x0000000000290000-0x0000000000381000-memory.dmp
        Filesize

        964KB

      • memory/1904-112-0x0000000000290000-0x0000000000381000-memory.dmp
        Filesize

        964KB

      • memory/1904-119-0x0000000000290000-0x0000000000381000-memory.dmp
        Filesize

        964KB

      • memory/1904-120-0x0000000000290000-0x0000000000381000-memory.dmp
        Filesize

        964KB

      • memory/1904-121-0x0000000000290000-0x0000000000381000-memory.dmp
        Filesize

        964KB

      • memory/1904-122-0x0000000000290000-0x0000000000381000-memory.dmp
        Filesize

        964KB

      • memory/1904-124-0x0000000000290000-0x0000000000381000-memory.dmp
        Filesize

        964KB

      • memory/1972-56-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/1972-66-0x0000000000400000-0x0000000000701000-memory.dmp
        Filesize

        3.0MB