Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    27-03-2023 21:53

General

  • Target

    file.exe

  • Size

    265KB

  • MD5

    cd8743aa91752e2e02571b2fe3a1c27b

  • SHA1

    3ba45028288170cfa3f137f5ce8924f0fbf6d36f

  • SHA256

    e3c7793b26883da4922c5bc91a769b0c1345badc04c967e5f89177aaf8364ea7

  • SHA512

    903cf7987825b983fcb7b87ef2900c61dbb5e92ded53191839be2ddf68cf09849fdd7399ae10766d9e5d1f5aa89dd1d4e32f6024e96bd7dac3645c5939017274

  • SSDEEP

    3072:FzSyRHyNFTsVxLZfLOAFGCluuTqoJUR1d5rFIjRu4xDYFLdBL5kMpDCU3wsUf2:9P5yNmVxLt4KmoaR1d5ralfxDYRSMp

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:1408
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lhrsypfd\
      2⤵
        PID:1716
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zltqwjpn.exe" C:\Windows\SysWOW64\lhrsypfd\
        2⤵
          PID:860
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create lhrsypfd binPath= "C:\Windows\SysWOW64\lhrsypfd\zltqwjpn.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:564
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description lhrsypfd "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:596
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start lhrsypfd
          2⤵
          • Launches sc.exe
          PID:472
        • 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:960
      • C:\Windows\SysWOW64\lhrsypfd\zltqwjpn.exe
        C:\Windows\SysWOW64\lhrsypfd\zltqwjpn.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:528
        • 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:1816
          • 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:1080

      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\zltqwjpn.exe
        Filesize

        11.7MB

        MD5

        5fc9103ed8a5f52c68229d9aae375081

        SHA1

        5e2cef882f3dcaa4800a32d76b84c4b89ceb8829

        SHA256

        70a7d2ef68cfaf1165aa8d7b266d7484b33899791cf51647df6976e4aad45899

        SHA512

        0ff03f44faf90a7f8e7a5ba0209dc6500d4ea0127df1d28aa28f798d4d61aaf9da085b813e9d2b296add08f09064e108a625fa1eedf79a65200423e787dba1fb

      • C:\Windows\SysWOW64\lhrsypfd\zltqwjpn.exe
        Filesize

        11.7MB

        MD5

        5fc9103ed8a5f52c68229d9aae375081

        SHA1

        5e2cef882f3dcaa4800a32d76b84c4b89ceb8829

        SHA256

        70a7d2ef68cfaf1165aa8d7b266d7484b33899791cf51647df6976e4aad45899

        SHA512

        0ff03f44faf90a7f8e7a5ba0209dc6500d4ea0127df1d28aa28f798d4d61aaf9da085b813e9d2b296add08f09064e108a625fa1eedf79a65200423e787dba1fb

      • memory/528-66-0x0000000000400000-0x0000000000705000-memory.dmp
        Filesize

        3.0MB

      • memory/1080-123-0x00000000002C0000-0x00000000003B1000-memory.dmp
        Filesize

        964KB

      • memory/1080-124-0x00000000002C0000-0x00000000003B1000-memory.dmp
        Filesize

        964KB

      • memory/1080-121-0x00000000002C0000-0x00000000003B1000-memory.dmp
        Filesize

        964KB

      • memory/1080-122-0x00000000002C0000-0x00000000003B1000-memory.dmp
        Filesize

        964KB

      • memory/1080-120-0x00000000002C0000-0x00000000003B1000-memory.dmp
        Filesize

        964KB

      • memory/1080-119-0x00000000002C0000-0x00000000003B1000-memory.dmp
        Filesize

        964KB

      • memory/1080-112-0x00000000002C0000-0x00000000003B1000-memory.dmp
        Filesize

        964KB

      • memory/1080-111-0x00000000002C0000-0x00000000003B1000-memory.dmp
        Filesize

        964KB

      • memory/1408-56-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/1408-65-0x0000000000400000-0x0000000000705000-memory.dmp
        Filesize

        3.0MB

      • memory/1816-88-0x0000000000230000-0x0000000000240000-memory.dmp
        Filesize

        64KB

      • memory/1816-96-0x0000000000230000-0x0000000000240000-memory.dmp
        Filesize

        64KB

      • memory/1816-79-0x0000000000230000-0x0000000000240000-memory.dmp
        Filesize

        64KB

      • memory/1816-82-0x0000000000230000-0x0000000000240000-memory.dmp
        Filesize

        64KB

      • memory/1816-83-0x0000000000230000-0x0000000000240000-memory.dmp
        Filesize

        64KB

      • memory/1816-84-0x0000000000230000-0x0000000000240000-memory.dmp
        Filesize

        64KB

      • memory/1816-85-0x0000000000230000-0x0000000000240000-memory.dmp
        Filesize

        64KB

      • memory/1816-86-0x0000000000230000-0x0000000000240000-memory.dmp
        Filesize

        64KB

      • memory/1816-87-0x0000000000230000-0x0000000000240000-memory.dmp
        Filesize

        64KB

      • memory/1816-75-0x0000000001C20000-0x0000000001E2F000-memory.dmp
        Filesize

        2.1MB

      • memory/1816-89-0x0000000000230000-0x0000000000240000-memory.dmp
        Filesize

        64KB

      • memory/1816-90-0x0000000000230000-0x0000000000240000-memory.dmp
        Filesize

        64KB

      • memory/1816-91-0x0000000000230000-0x0000000000240000-memory.dmp
        Filesize

        64KB

      • memory/1816-92-0x0000000000230000-0x0000000000240000-memory.dmp
        Filesize

        64KB

      • memory/1816-93-0x0000000000230000-0x0000000000240000-memory.dmp
        Filesize

        64KB

      • memory/1816-94-0x0000000000230000-0x0000000000240000-memory.dmp
        Filesize

        64KB

      • memory/1816-95-0x0000000000230000-0x0000000000240000-memory.dmp
        Filesize

        64KB

      • memory/1816-76-0x00000000001E0000-0x00000000001E6000-memory.dmp
        Filesize

        24KB

      • memory/1816-97-0x0000000000230000-0x0000000000240000-memory.dmp
        Filesize

        64KB

      • memory/1816-98-0x0000000000230000-0x0000000000240000-memory.dmp
        Filesize

        64KB

      • memory/1816-99-0x0000000000240000-0x0000000000245000-memory.dmp
        Filesize

        20KB

      • memory/1816-102-0x0000000000240000-0x0000000000245000-memory.dmp
        Filesize

        20KB

      • memory/1816-103-0x0000000005690000-0x0000000005A9B000-memory.dmp
        Filesize

        4.0MB

      • memory/1816-106-0x0000000005690000-0x0000000005A9B000-memory.dmp
        Filesize

        4.0MB

      • memory/1816-107-0x0000000000290000-0x0000000000297000-memory.dmp
        Filesize

        28KB

      • memory/1816-72-0x0000000001C20000-0x0000000001E2F000-memory.dmp
        Filesize

        2.1MB

      • memory/1816-70-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1816-69-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1816-68-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1816-67-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1816-60-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1816-62-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1816-61-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB