Resubmissions

17/10/2022, 14:19

221017-rm5emacaf410

17/10/2022, 14:09

221017-rf8tgacbgp10

15/10/2022, 16:38

221015-t5dezafggp10

Analysis

  • max time kernel
    150s
  • max time network
    137s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17/10/2022, 14:19

General

  • Target
    e41ad88438135bf0b2189701de819be1.exe
  • Size 213KB
  • Sample221017-rm5emacaf4
  • SHA256 cd3a2b42f2d770f1f870b2e3be9d0a5262b8038d65e6f95a1e63bed333150db5
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • erbium

C2
  • http://77.73.133.53/cloud/index.php

Signatures

  • Detects Smokeloader packer 1 IoCs
  • Erbium

    Erbium is an infostealer written in C++ and first seen in July 2022.

  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Downloads MZ/PE file
  • Executes dropped EXE 10 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Loads dropped DLL 4 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • 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 3 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 19 IoCs
  • Suspicious use of AdjustPrivilegeToken 56 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\e41ad88438135bf0b2189701de819be1.exe
    "C:\Users\Admin\AppData\Local\Temp\e41ad88438135bf0b2189701de819be1.exe"
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    PID:3024
  • C:\Users\Admin\AppData\Local\Temp\196.exe
    C:\Users\Admin\AppData\Local\Temp\196.exe
    1⤵
    • Executes dropped EXE
    PID:960
  • C:\Users\Admin\AppData\Local\Temp\4F2.exe
    C:\Users\Admin\AppData\Local\Temp\4F2.exe
    1⤵
    • Executes dropped EXE
    PID:184
  • C:\Users\Admin\AppData\Local\Temp\6553.exe
    C:\Users\Admin\AppData\Local\Temp\6553.exe
    1⤵
    • Executes dropped EXE
    PID:1448
  • C:\Users\Admin\AppData\Local\Temp\71B8.exe
    C:\Users\Admin\AppData\Local\Temp\71B8.exe
    1⤵
    • Executes dropped EXE
    PID:4280
  • C:\Users\Admin\AppData\Local\Temp\90AB.exe
    C:\Users\Admin\AppData\Local\Temp\90AB.exe
    1⤵
    • Executes dropped EXE
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1464
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\main\main.bat" /S"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4292
      • C:\Windows\system32\mode.com
        mode 65,10
        3⤵
          PID:4500
        • C:\Users\Admin\AppData\Local\Temp\main\7z.exe
          7z.exe e file.zip -p3245510188437331521472513953 -oextracted
          3⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Suspicious use of AdjustPrivilegeToken
          PID:4988
        • C:\Users\Admin\AppData\Local\Temp\main\7z.exe
          7z.exe e extracted/file_3.zip -oextracted
          3⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Suspicious use of AdjustPrivilegeToken
          PID:364
        • C:\Users\Admin\AppData\Local\Temp\main\7z.exe
          7z.exe e extracted/file_2.zip -oextracted
          3⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Suspicious use of AdjustPrivilegeToken
          PID:4628
        • C:\Users\Admin\AppData\Local\Temp\main\7z.exe
          7z.exe e extracted/file_1.zip -oextracted
          3⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Suspicious use of AdjustPrivilegeToken
          PID:2980
        • C:\Windows\system32\attrib.exe
          attrib +H "isaas.exe"
          3⤵
          • Views/modifies file attributes
          PID:936
        • C:\Users\Admin\AppData\Local\Temp\main\isaas.exe
          "isaas.exe"
          3⤵
          • Executes dropped EXE
          PID:2920
    • C:\Windows\SysWOW64\explorer.exe
      C:\Windows\SysWOW64\explorer.exe
      1⤵
        PID:2796
      • C:\Windows\explorer.exe
        C:\Windows\explorer.exe
        1⤵
          PID:2108
        • C:\Windows\SysWOW64\explorer.exe
          C:\Windows\SysWOW64\explorer.exe
          1⤵
            PID:3324
          • C:\Windows\explorer.exe
            C:\Windows\explorer.exe
            1⤵
              PID:4604
            • C:\Windows\SysWOW64\explorer.exe
              C:\Windows\SysWOW64\explorer.exe
              1⤵
                PID:3680
              • C:\Windows\SysWOW64\explorer.exe
                C:\Windows\SysWOW64\explorer.exe
                1⤵
                  PID:4196
                • C:\Windows\SysWOW64\explorer.exe
                  C:\Windows\SysWOW64\explorer.exe
                  1⤵
                    PID:4516
                  • C:\Windows\explorer.exe
                    C:\Windows\explorer.exe
                    1⤵
                      PID:2604
                    • C:\Windows\SysWOW64\explorer.exe
                      C:\Windows\SysWOW64\explorer.exe
                      1⤵
                        PID:4636

                      Network

                            MITRE ATT&CK Enterprise v6

                            Replay Monitor

                            Loading Replay Monitor...

                            Downloads

                            196.exe

                            • Path C:\Users\Admin\AppData\Local\Temp\196.exe
                            • Size 415KB
                            • SHA256 1c5bffcb4f1b72017173d7342e52737e81bad54e9aca9ab344542737943d46f9
                            • MD5 SHA1 SHA512 SSDEEP

                            196.exe

                            • Path C:\Users\Admin\AppData\Local\Temp\196.exe
                            • Size 415KB
                            • SHA256 1c5bffcb4f1b72017173d7342e52737e81bad54e9aca9ab344542737943d46f9
                            • MD5 SHA1 SHA512 SSDEEP

                            4F2.exe

                            • Path C:\Users\Admin\AppData\Local\Temp\4F2.exe
                            • Size 352KB
                            • SHA256 cc47d3db024920205db9a6ed2742d6f6522a5838ddfac9b6347a938907e86b15
                            • MD5 SHA1 SHA512 SSDEEP

                            4F2.exe

                            • Path C:\Users\Admin\AppData\Local\Temp\4F2.exe
                            • Size 352KB
                            • SHA256 cc47d3db024920205db9a6ed2742d6f6522a5838ddfac9b6347a938907e86b15
                            • MD5 SHA1 SHA512 SSDEEP

                            6553.exe

                            • Path C:\Users\Admin\AppData\Local\Temp\6553.exe
                            • Size 352KB
                            • SHA256 1925f577470837e7b7706ea41838fe3917a214ab05bb6e49ab94ac70f5600636
                            • MD5 SHA1 SHA512 SSDEEP

                            6553.exe

                            • Path C:\Users\Admin\AppData\Local\Temp\6553.exe
                            • Size 352KB
                            • SHA256 1925f577470837e7b7706ea41838fe3917a214ab05bb6e49ab94ac70f5600636
                            • MD5 SHA1 SHA512 SSDEEP

                            71B8.exe

                            • Path C:\Users\Admin\AppData\Local\Temp\71B8.exe
                            • Size 352KB
                            • SHA256 87a81819b988a608cedd75e459aeb82cde6448a81d6ad7666fd14d22f60520ab
                            • MD5 SHA1 SHA512 SSDEEP

                            71B8.exe

                            • Path C:\Users\Admin\AppData\Local\Temp\71B8.exe
                            • Size 352KB
                            • SHA256 87a81819b988a608cedd75e459aeb82cde6448a81d6ad7666fd14d22f60520ab
                            • MD5 SHA1 SHA512 SSDEEP

                            90AB.exe

                            • Path C:\Users\Admin\AppData\Local\Temp\90AB.exe
                            • Size 2.5MB
                            • SHA256 00abe64f9c24a1db29e1d470ab638d0cdd802984947fe0708e3f3e217e447afb
                            • MD5 SHA1 SHA512 SSDEEP

                            90AB.exe

                            • Path C:\Users\Admin\AppData\Local\Temp\90AB.exe
                            • Size 2.5MB
                            • SHA256 00abe64f9c24a1db29e1d470ab638d0cdd802984947fe0708e3f3e217e447afb
                            • MD5 SHA1 SHA512 SSDEEP

                            7z.dll

                            • Path C:\Users\Admin\AppData\Local\Temp\main\7z.dll
                            • Size 1.6MB
                            • SHA256 34ad9bb80fe8bf28171e671228eb5b64a55caa388c31cb8c0df77c0136735891
                            • MD5 SHA1 SHA512 SSDEEP

                            7z.dll

                            • Path C:\Users\Admin\AppData\Local\Temp\main\7z.dll
                            • Size 1.6MB
                            • SHA256 34ad9bb80fe8bf28171e671228eb5b64a55caa388c31cb8c0df77c0136735891
                            • MD5 SHA1 SHA512 SSDEEP

                            7z.dll

                            • Path C:\Users\Admin\AppData\Local\Temp\main\7z.dll
                            • Size 1.6MB
                            • SHA256 34ad9bb80fe8bf28171e671228eb5b64a55caa388c31cb8c0df77c0136735891
                            • MD5 SHA1 SHA512 SSDEEP

                            7z.dll

                            • Path C:\Users\Admin\AppData\Local\Temp\main\7z.dll
                            • Size 1.6MB
                            • SHA256 34ad9bb80fe8bf28171e671228eb5b64a55caa388c31cb8c0df77c0136735891
                            • MD5 SHA1 SHA512 SSDEEP

                            7z.dll

                            • Path C:\Users\Admin\AppData\Local\Temp\main\7z.dll
                            • Size 1.6MB
                            • SHA256 34ad9bb80fe8bf28171e671228eb5b64a55caa388c31cb8c0df77c0136735891
                            • MD5 SHA1 SHA512 SSDEEP

                            7z.exe

                            • Path C:\Users\Admin\AppData\Local\Temp\main\7z.exe
                            • Size 458KB
                            • SHA256 344f076bb1211cb02eca9e5ed2c0ce59bcf74ccbc749ec611538fa14ecb9aad2
                            • MD5 SHA1 SHA512 SSDEEP

                            7z.exe

                            • Path C:\Users\Admin\AppData\Local\Temp\main\7z.exe
                            • Size 458KB
                            • SHA256 344f076bb1211cb02eca9e5ed2c0ce59bcf74ccbc749ec611538fa14ecb9aad2
                            • MD5 SHA1 SHA512 SSDEEP

                            7z.exe

                            • Path C:\Users\Admin\AppData\Local\Temp\main\7z.exe
                            • Size 458KB
                            • SHA256 344f076bb1211cb02eca9e5ed2c0ce59bcf74ccbc749ec611538fa14ecb9aad2
                            • MD5 SHA1 SHA512 SSDEEP

                            7z.exe

                            • Path C:\Users\Admin\AppData\Local\Temp\main\7z.exe
                            • Size 458KB
                            • SHA256 344f076bb1211cb02eca9e5ed2c0ce59bcf74ccbc749ec611538fa14ecb9aad2
                            • MD5 SHA1 SHA512 SSDEEP

                            ANTIAV~1.DAT

                            • Path C:\Users\Admin\AppData\Local\Temp\main\extracted\ANTIAV~1.DAT
                            • Size 2.1MB
                            • SHA256 993fbff9e2154d7fefa2ce1e6e8353664f478d52d6220ae62fce480abfc2c9c0
                            • MD5 SHA1 SHA512 SSDEEP

                            file_1.zip

                            • Path C:\Users\Admin\AppData\Local\Temp\main\extracted\file_1.zip
                            • Size 3KB
                            • SHA256 3fe32eaebb03b409fc0edaf8b9e269dae420ac107594232011ae1464b75239eb
                            • MD5 SHA1 SHA512

                            file_2.zip

                            • Path C:\Users\Admin\AppData\Local\Temp\main\extracted\file_2.zip
                            • Size 3KB
                            • SHA256 009da3b14ef5f081fd65da62fd015b5944c6a7edaf21b245f04cf9338f9d25c3
                            • MD5 SHA1 SHA512

                            file_3.zip

                            • Path C:\Users\Admin\AppData\Local\Temp\main\extracted\file_3.zip
                            • Size 1.5MB
                            • SHA256 47abab88c18b1e6eba7c2c030deeb86c4263d836a2cec2faf670cfa2b9836274
                            • MD5 SHA1 SHA512 SSDEEP

                            isaas.exe

                            • Path C:\Users\Admin\AppData\Local\Temp\main\extracted\isaas.exe
                            • Size 10KB
                            • SHA256 20837c24531ede4a540d16688badcce8e2099a12c3f83afd6db6e4b838732185
                            • MD5 SHA1 SHA512 SSDEEP

                            file.bin

                            • Path C:\Users\Admin\AppData\Local\Temp\main\file.bin
                            • Size 1.5MB
                            • SHA256 39fb83950cb95fc0fe73fbe1dccd83335d41e3931cb1b3470e9fa472bf291dcd
                            • MD5 SHA1 SHA512 SSDEEP

                            isaas.exe

                            • Path C:\Users\Admin\AppData\Local\Temp\main\isaas.exe
                            • Size 10KB
                            • SHA256 20837c24531ede4a540d16688badcce8e2099a12c3f83afd6db6e4b838732185
                            • MD5 SHA1 SHA512 SSDEEP

                            main.bat

                            • Path C:\Users\Admin\AppData\Local\Temp\main\main.bat
                            • Size 454B
                            • SHA256 a2a036641d182b94f67a872adff2d02244722623425215eff050bab90bd5b7d5
                            • MD5 SHA1 SHA512

                            memory/2108-158-0x0000000000C20000-0x0000000000C2F000-memory.dmp

                            memory/2108-157-0x0000000000C30000-0x0000000000C39000-memory.dmp

                            memory/2108-206-0x0000000000C30000-0x0000000000C39000-memory.dmp

                            memory/2604-200-0x0000000000900000-0x0000000000907000-memory.dmp

                            memory/2604-201-0x00000000008F0000-0x00000000008FD000-memory.dmp

                            memory/2604-213-0x0000000000900000-0x0000000000907000-memory.dmp

                            memory/2796-205-0x00000000001F0000-0x00000000001F7000-memory.dmp

                            memory/2796-156-0x00000000001E0000-0x00000000001EB000-memory.dmp

                            memory/2796-152-0x00000000001F0000-0x00000000001F7000-memory.dmp

                            memory/2920-190-0x0000000005AB0000-0x0000000005D73000-memory.dmp

                            memory/2920-188-0x0000000005AB0000-0x0000000005D73000-memory.dmp

                            memory/2920-209-0x0000000005AB0000-0x0000000005D73000-memory.dmp

                            memory/3024-132-0x000000000066E000-0x000000000067E000-memory.dmp

                            memory/3024-133-0x0000000000A20000-0x0000000000A29000-memory.dmp

                            memory/3024-135-0x0000000000400000-0x000000000043A000-memory.dmp

                            memory/3024-134-0x0000000000400000-0x000000000043A000-memory.dmp

                            memory/3324-179-0x00000000009C0000-0x00000000009C9000-memory.dmp

                            memory/3324-207-0x00000000009D0000-0x00000000009D5000-memory.dmp

                            memory/3324-178-0x00000000009D0000-0x00000000009D5000-memory.dmp

                            memory/3680-210-0x0000000000F50000-0x0000000000F72000-memory.dmp

                            memory/3680-191-0x0000000000F50000-0x0000000000F72000-memory.dmp

                            memory/3680-192-0x0000000000F20000-0x0000000000F47000-memory.dmp

                            memory/4196-194-0x0000000000840000-0x0000000000845000-memory.dmp

                            memory/4196-195-0x0000000000830000-0x0000000000839000-memory.dmp

                            memory/4196-211-0x0000000000840000-0x0000000000845000-memory.dmp

                            memory/4516-197-0x0000000000F30000-0x0000000000F36000-memory.dmp

                            memory/4516-198-0x0000000000F20000-0x0000000000F2B000-memory.dmp

                            memory/4516-212-0x0000000000F30000-0x0000000000F36000-memory.dmp

                            memory/4604-186-0x00000000009D0000-0x00000000009D6000-memory.dmp

                            memory/4604-208-0x00000000009D0000-0x00000000009D6000-memory.dmp

                            memory/4604-187-0x00000000009C0000-0x00000000009CC000-memory.dmp

                            memory/4636-204-0x00000000007A0000-0x00000000007AB000-memory.dmp

                            memory/4636-203-0x00000000007B0000-0x00000000007B8000-memory.dmp

                            memory/4636-214-0x00000000007B0000-0x00000000007B8000-memory.dmp