Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    06-02-2023 20:48

General

  • Target

    file.exe

  • Size

    300KB

  • MD5

    8ba26140aec7702f27a18eb7e9238fe9

  • SHA1

    3e5b466368a5077dc9b938ea45642331986f8827

  • SHA256

    e764480dd6acba37e913e3e907d44f5f912c56c067caf5118101aaa12445bbbd

  • SHA512

    eb48d8a92dd494fc421f42910f9185eae2464e97b1c2932f76aa97810dded8ae9f007e81ad5cdb43b58bd08509efa1e4c1b697f098008e1887086be37bbd5d79

  • SSDEEP

    3072:CRwb6b2PyLhUGRG/ukjNP99fTP5YTt/BuQjiMTE5B5Eafj:Cy1PyLW1WkjNV9fL2TFBuQj9wEa

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.

  • Windows security bypass 2 TTPs 1 IoCs
  • xmrig

    XMRig is a high performance, open source, cross platform CPU/GPU miner.

  • XMRig Miner payload 2 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:1820
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qugmoz\
      2⤵
        PID:620
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zkglcvhw.exe" C:\Windows\SysWOW64\qugmoz\
        2⤵
          PID:1356
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create qugmoz binPath= "C:\Windows\SysWOW64\qugmoz\zkglcvhw.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:380
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description qugmoz "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1508
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start qugmoz
          2⤵
          • Launches sc.exe
          PID:892
        • 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:860
      • C:\Windows\SysWOW64\qugmoz\zkglcvhw.exe
        C:\Windows\SysWOW64\qugmoz\zkglcvhw.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1336
        • 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:744
          • 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:1612

      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\zkglcvhw.exe
        Filesize

        10.3MB

        MD5

        a0a26d9d43a2f1fe5e9c7039227c0a5c

        SHA1

        c14f3f3dc96fa68d89f8b413f2514f7937a7fd97

        SHA256

        f188116448f428b582b006cc7074a0e3639aabbbbf26911e5c3e57678d191a88

        SHA512

        d6f9b0051356dc870d5fe9eaa461352b8e0e0bcfd8e93242db740f4840494bff40ae145dc033caa889dfb4d1d75a20dc46e86b19e57cb72548294f18093590da

      • C:\Windows\SysWOW64\qugmoz\zkglcvhw.exe
        Filesize

        10.3MB

        MD5

        a0a26d9d43a2f1fe5e9c7039227c0a5c

        SHA1

        c14f3f3dc96fa68d89f8b413f2514f7937a7fd97

        SHA256

        f188116448f428b582b006cc7074a0e3639aabbbbf26911e5c3e57678d191a88

        SHA512

        d6f9b0051356dc870d5fe9eaa461352b8e0e0bcfd8e93242db740f4840494bff40ae145dc033caa889dfb4d1d75a20dc46e86b19e57cb72548294f18093590da

      • memory/380-61-0x0000000000000000-mapping.dmp
      • memory/620-58-0x0000000000000000-mapping.dmp
      • memory/744-70-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/744-72-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/744-107-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/744-95-0x0000000000200000-0x0000000000207000-memory.dmp
        Filesize

        28KB

      • memory/744-92-0x0000000005530000-0x000000000593B000-memory.dmp
        Filesize

        4.0MB

      • memory/744-89-0x00000000001B0000-0x00000000001B5000-memory.dmp
        Filesize

        20KB

      • memory/744-86-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/744-83-0x0000000000150000-0x0000000000156000-memory.dmp
        Filesize

        24KB

      • memory/744-80-0x0000000001A20000-0x0000000001C2F000-memory.dmp
        Filesize

        2.1MB

      • memory/744-79-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/744-73-0x00000000000C9A6B-mapping.dmp
      • memory/860-65-0x0000000000000000-mapping.dmp
      • memory/892-63-0x0000000000000000-mapping.dmp
      • memory/1336-74-0x00000000005AC000-0x00000000005C1000-memory.dmp
        Filesize

        84KB

      • memory/1336-77-0x0000000000400000-0x00000000004C8000-memory.dmp
        Filesize

        800KB

      • memory/1356-59-0x0000000000000000-mapping.dmp
      • memory/1508-62-0x0000000000000000-mapping.dmp
      • memory/1612-105-0x000000000017259C-mapping.dmp
      • memory/1612-100-0x00000000000E0000-0x00000000001D1000-memory.dmp
        Filesize

        964KB

      • memory/1612-98-0x00000000000E0000-0x00000000001D1000-memory.dmp
        Filesize

        964KB

      • memory/1820-55-0x000000000061C000-0x0000000000631000-memory.dmp
        Filesize

        84KB

      • memory/1820-56-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/1820-54-0x00000000757B1000-0x00000000757B3000-memory.dmp
        Filesize

        8KB

      • memory/1820-66-0x000000000061C000-0x0000000000631000-memory.dmp
        Filesize

        84KB

      • memory/1820-67-0x0000000000400000-0x00000000004C8000-memory.dmp
        Filesize

        800KB

      • memory/1820-57-0x0000000000400000-0x00000000004C8000-memory.dmp
        Filesize

        800KB