Analysis

  • max time kernel
    156s
  • max time network
    168s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220113
  • submitted
    26/03/2022, 16:10

General

  • Target
    bf5583a1b318ba14bae72e9fa7bb8a6a.exe
  • Size 223KB
  • Sample220326-tmf35sbbfn
  • SHA256 a37cbddb545f168aa1dbb09433e228e5a956f6d8fbc00fae892a5f047990a71f
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • smokeloader

Version
  • 2020

C2
  • http://coralee.at/upload/

  • http://ducvietcao.com/upload/

  • http://biz-acc.ru/upload/

  • http://toimap.com/upload/

  • http://bbb7d.com/upload/

  • http://piratia-life.ru/upload/

  • http://curvreport.com/upload/

  • http://viagratos.com/upload/

  • http://mordo.ru/upload/

  • http://pkodev.net/upload/

rc4.i32
rc4.i32

Signatures

  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • suricata: ET MALWARE Danabot Key Exchange Request

    suricata: ET MALWARE Danabot Key Exchange Request

  • Blocklisted process makes network request 2 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Program crash 5 IoCs
  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

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

  • Checks processor information in registry 2 TTPs 46 IoCs

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

  • Modifies Internet Explorer settings 1 TTPs 4 IoCs
  • Modifies registry class 19 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 32 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bf5583a1b318ba14bae72e9fa7bb8a6a.exe
    "C:\Users\Admin\AppData\Local\Temp\bf5583a1b318ba14bae72e9fa7bb8a6a.exe"
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    PID:3004
  • C:\Users\Admin\AppData\Local\Temp\F7DA.exe
    C:\Users\Admin\AppData\Local\Temp\F7DA.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:4168
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\syswow64\rundll32.exe" "C:\Windows\syswow64\shell32.dll",#61
      2⤵
      • Blocklisted process makes network request
      PID:1492
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4168 -s 612
      2⤵
      • Program crash
      PID:696
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4168 -s 880
      2⤵
      • Program crash
      PID:4016
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4168 -s 940
      2⤵
      • Program crash
      PID:3140
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4168 -s 900
      2⤵
      • Program crash
      PID:1484
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4168 -s 904
      2⤵
      • Program crash
      PID:4660
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\syswow64\rundll32.exe" "C:\Windows\syswow64\shell32.dll",#61
      2⤵
      • Blocklisted process makes network request
      • Checks processor information in registry
      • Modifies registry class
      • Suspicious use of FindShellTrayWindow
      PID:4780
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4168 -ip 4168
    1⤵
      PID:1752
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 512 -p 4168 -ip 4168
      1⤵
        PID:212
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 4168 -ip 4168
        1⤵
          PID:4428
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 4168 -ip 4168
          1⤵
            PID:3644
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 4168 -ip 4168
            1⤵
              PID:4516

            Network

                  MITRE ATT&CK Enterprise v6

                  Replay Monitor

                  Loading Replay Monitor...

                  Downloads

                  memory/1492-147-0x0000000000D90000-0x0000000000D94000-memory.dmp

                  memory/1492-144-0x0000000000D60000-0x0000000000D64000-memory.dmp

                  memory/1492-146-0x0000000000D80000-0x0000000000D84000-memory.dmp

                  memory/1492-145-0x0000000000D70000-0x0000000000D74000-memory.dmp

                  memory/2216-134-0x0000000000900000-0x0000000000916000-memory.dmp

                  memory/3004-130-0x0000000000578000-0x0000000000581000-memory.dmp

                  memory/3004-133-0x0000000000400000-0x000000000047B000-memory.dmp

                  memory/3004-132-0x0000000000500000-0x0000000000509000-memory.dmp

                  memory/3004-131-0x0000000000578000-0x0000000000581000-memory.dmp

                  memory/4168-150-0x0000000003000000-0x0000000003A52000-memory.dmp

                  memory/4168-158-0x0000000003A60000-0x0000000003BA0000-memory.dmp

                  memory/4168-141-0x0000000000400000-0x0000000000630000-memory.dmp

                  memory/4168-140-0x0000000002490000-0x00000000026B3000-memory.dmp

                  memory/4168-139-0x00000000023AD000-0x000000000248A000-memory.dmp

                  memory/4168-138-0x0000000000400000-0x0000000000630000-memory.dmp

                  memory/4168-149-0x0000000003000000-0x0000000003A52000-memory.dmp

                  memory/4168-151-0x0000000003BF0000-0x0000000003BF1000-memory.dmp

                  memory/4168-152-0x0000000003000000-0x0000000003A52000-memory.dmp

                  memory/4168-154-0x0000000003A60000-0x0000000003BA0000-memory.dmp

                  memory/4168-155-0x0000000003A60000-0x0000000003BA0000-memory.dmp

                  memory/4168-157-0x0000000003A60000-0x0000000003BA0000-memory.dmp

                  memory/4168-156-0x0000000000AD0000-0x0000000000AD1000-memory.dmp

                  memory/4168-153-0x0000000000AC0000-0x0000000000AC1000-memory.dmp

                  memory/4168-142-0x0000000000400000-0x0000000000630000-memory.dmp

                  memory/4168-160-0x0000000003A60000-0x0000000003BA0000-memory.dmp

                  memory/4168-161-0x0000000003A60000-0x0000000003BA0000-memory.dmp

                  memory/4168-159-0x0000000000AE0000-0x0000000000AE1000-memory.dmp

                  memory/4168-163-0x0000000003A60000-0x0000000003BA0000-memory.dmp

                  memory/4168-164-0x0000000003A60000-0x0000000003BA0000-memory.dmp

                  memory/4168-162-0x0000000002870000-0x0000000002871000-memory.dmp

                  memory/4780-167-0x0000000004480000-0x0000000004481000-memory.dmp

                  memory/4780-168-0x0000000003330000-0x0000000003D82000-memory.dmp

                  memory/4780-169-0x00000000044D0000-0x00000000044D1000-memory.dmp

                  memory/4780-170-0x0000000003DD0000-0x0000000003F10000-memory.dmp

                  memory/4780-171-0x0000000000E20000-0x0000000001752000-memory.dmp

                  memory/4780-172-0x0000000003DD0000-0x0000000003F10000-memory.dmp

                  memory/4780-173-0x0000000003330000-0x0000000003D82000-memory.dmp