Analysis

  • max time kernel
    150s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-en-20211104
  • submitted
    21/11/2021, 01:43

General

  • Target
    bdc561720c7e45e7ef35a665477a0a99.exe
  • Size 337KB
  • Sample211121-b49snsddcm
  • SHA256 81a1bb24ae8a11ad1d5898b86f0a4f3b5b4905792fce596af3fc994272e4f66d
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • smokeloader

Version
  • 2020

C2
  • http://host-file-host6.com/

  • http://host-host-file8.com/

rc4.i32
rc4.i32

Extracted

Family
  • tofsee

C2
  • quadoil.ru

  • lakeflex.ru

Extracted

Family
  • redline

C2
  • 185.159.80.90:38637

Signatures

  • RedLine

    RedLine Stealer is a malware family written in C#, first appearing in early 2020.

  • RedLine Payload 5 IoCs
  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Tofsee

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

  • Windows security bypass 2 TTPs
  • xmrig

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

  • XMRig Miner Payload 2 IoCs
  • Creates new service(s) 1 TTPs
  • Downloads MZ/PE file
  • Executes dropped EXE 9 IoCs
  • Modifies Windows Firewall 1 TTPs
  • Sets service image path in registry 2 TTPs
  • Deletes itself 1 IoCs
  • Loads dropped DLL 5 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Drops file in System32 directory 2 IoCs
  • Suspicious use of SetThreadContext 5 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.

  • Checks SCSI registry key(s) 3 TTPs 6 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Modifies data under HKEY_USERS 11 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SendNotifyMessage 2 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bdc561720c7e45e7ef35a665477a0a99.exe
    "C:\Users\Admin\AppData\Local\Temp\bdc561720c7e45e7ef35a665477a0a99.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1712
    • C:\Users\Admin\AppData\Local\Temp\bdc561720c7e45e7ef35a665477a0a99.exe
      "C:\Users\Admin\AppData\Local\Temp\bdc561720c7e45e7ef35a665477a0a99.exe"
      2⤵
      • Checks SCSI registry key(s)
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      PID:756
  • C:\Users\Admin\AppData\Local\Temp\786B.exe
    C:\Users\Admin\AppData\Local\Temp\786B.exe
    1⤵
    • Executes dropped EXE
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:108
    • C:\Users\Admin\AppData\Local\Temp\786B.exe
      C:\Users\Admin\AppData\Local\Temp\786B.exe
      2⤵
      • Executes dropped EXE
      • Checks SCSI registry key(s)
      • Suspicious behavior: MapViewOfSection
      PID:1660
  • C:\Users\Admin\AppData\Local\Temp\8769.exe
    C:\Users\Admin\AppData\Local\Temp\8769.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:432
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\omysilxd\
      2⤵
        PID:980
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\inmkagpe.exe" C:\Windows\SysWOW64\omysilxd\
        2⤵
          PID:1128
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create omysilxd binPath= "C:\Windows\SysWOW64\omysilxd\inmkagpe.exe /d\"C:\Users\Admin\AppData\Local\Temp\8769.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:2012
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description omysilxd "wifi internet conection"
            2⤵
              PID:824
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start omysilxd
              2⤵
                PID:944
              • 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:1628
              • C:\Users\Admin\AppData\Local\Temp\95BC.exe
                C:\Users\Admin\AppData\Local\Temp\95BC.exe
                1⤵
                • Executes dropped EXE
                • Loads dropped DLL
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:1336
                • C:\Users\Admin\AppData\Local\Temp\95BC.exe
                  C:\Users\Admin\AppData\Local\Temp\95BC.exe
                  2⤵
                  • Executes dropped EXE
                  PID:612
                • C:\Users\Admin\AppData\Local\Temp\95BC.exe
                  C:\Users\Admin\AppData\Local\Temp\95BC.exe
                  2⤵
                  • Executes dropped EXE
                  PID:900
                • C:\Users\Admin\AppData\Local\Temp\95BC.exe
                  C:\Users\Admin\AppData\Local\Temp\95BC.exe
                  2⤵
                  • Executes dropped EXE
                  PID:1380
                • C:\Users\Admin\AppData\Local\Temp\95BC.exe
                  C:\Users\Admin\AppData\Local\Temp\95BC.exe
                  2⤵
                  • Executes dropped EXE
                  • Suspicious use of AdjustPrivilegeToken
                  PID:1608
              • C:\Windows\SysWOW64\omysilxd\inmkagpe.exe
                C:\Windows\SysWOW64\omysilxd\inmkagpe.exe /d"C:\Users\Admin\AppData\Local\Temp\8769.exe"
                1⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                PID:1332
                • C:\Windows\SysWOW64\svchost.exe
                  svchost.exe
                  2⤵
                  • Drops file in System32 directory
                  • Suspicious use of SetThreadContext
                  • Modifies data under HKEY_USERS
                  PID:1940
                  • C:\Windows\SysWOW64\svchost.exe
                    svchost.exe -o fastpool.xyz:10060 -u 9rLbTvsApFs3i3ojk5hDKicMNRQbxxFGwJA2hNC6NoZZDQN5tTFbhviFm4W3koxSrPg87Lnif7qxFYh9xpTJz1cT6B17Ph4.50000 -p x -k -a cn/half
                    3⤵
                    • Suspicious use of AdjustPrivilegeToken
                    PID:1460

              Network

                    MITRE ATT&CK Enterprise v6

                    Replay Monitor

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                    Downloads

                    memory/108-65-0x00000000002E8000-0x00000000002F9000-memory.dmp

                    memory/432-79-0x0000000000308000-0x0000000000318000-memory.dmp

                    memory/432-84-0x0000000000400000-0x0000000002B4C000-memory.dmp

                    memory/432-83-0x0000000000020000-0x0000000000033000-memory.dmp

                    memory/756-56-0x0000000000400000-0x0000000000409000-memory.dmp

                    memory/756-58-0x0000000074E51000-0x0000000074E53000-memory.dmp

                    memory/1220-87-0x0000000003EE0000-0x0000000003EF6000-memory.dmp

                    memory/1220-60-0x0000000002120000-0x0000000002136000-memory.dmp

                    memory/1332-106-0x0000000000400000-0x0000000002B4C000-memory.dmp

                    memory/1332-98-0x0000000002D08000-0x0000000002D18000-memory.dmp

                    memory/1336-78-0x00000000005C0000-0x00000000005C1000-memory.dmp

                    memory/1336-75-0x0000000000120000-0x0000000000121000-memory.dmp

                    memory/1460-117-0x00000000000C0000-0x00000000001B1000-memory.dmp

                    memory/1460-118-0x00000000000C0000-0x00000000001B1000-memory.dmp

                    memory/1608-116-0x00000000003A0000-0x00000000003A1000-memory.dmp

                    memory/1608-114-0x0000000000400000-0x0000000000420000-memory.dmp

                    memory/1608-108-0x0000000000400000-0x0000000000420000-memory.dmp

                    memory/1608-107-0x0000000000400000-0x0000000000420000-memory.dmp

                    memory/1608-109-0x0000000000400000-0x0000000000420000-memory.dmp

                    memory/1608-110-0x0000000000400000-0x0000000000420000-memory.dmp

                    memory/1608-111-0x0000000000400000-0x0000000000420000-memory.dmp

                    memory/1712-59-0x0000000000020000-0x0000000000029000-memory.dmp

                    memory/1712-55-0x0000000002D38000-0x0000000002D49000-memory.dmp

                    memory/1940-103-0x0000000000080000-0x0000000000095000-memory.dmp

                    memory/1940-102-0x0000000000080000-0x0000000000095000-memory.dmp