Analysis

  • max time kernel
    150s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    16/03/2024, 02:46

General

  • Target

    b9196dcff2d2111eda761f7068c9969e831163dc6d6149860db49c1a6e644f2d.exe

  • Size

    400KB

  • MD5

    69f82b6ea6c6329ef25d7fd84dfa1e09

  • SHA1

    59c5d537d35219f3b01e4466f4b542d0c5af6975

  • SHA256

    b9196dcff2d2111eda761f7068c9969e831163dc6d6149860db49c1a6e644f2d

  • SHA512

    3bcbc8892db10fa20c24271cfed9d263a922aee598b9afbe0f666dc05a4e5229b5f2e62c9a8900c0592a41f7142ce6b33bd45d78c5095c51493fe864428ada83

  • SSDEEP

    12288:WFJ9r4rzUeDK2C3SbD8CYoDo1Ovf19VAJwn8:CDMvUeDK2C3mDxYKoe1QP

Malware Config

Extracted

Family

stealc

C2

http://185.172.128.145

Attributes
  • url_path

    /3cd2b41cbde8fc9c.php

Signatures

  • Stealc

    Stealc is an infostealer written in C++.

  • Detect binaries embedding considerable number of MFA browser extension IDs. 6 IoCs
  • Detect binaries embedding considerable number of cryptocurrency wallet browser extension IDs. 6 IoCs
  • Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 5 IoCs
  • UPX dump on OEP (original entry point) 3 IoCs
  • Downloads MZ/PE file
  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 2 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of web browsers 2 TTPs

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

  • UPX packed file 3 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks installed software on the system 1 TTPs

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

  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 2 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 27 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b9196dcff2d2111eda761f7068c9969e831163dc6d6149860db49c1a6e644f2d.exe
    "C:\Users\Admin\AppData\Local\Temp\b9196dcff2d2111eda761f7068c9969e831163dc6d6149860db49c1a6e644f2d.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1820
    • C:\Users\Admin\AppData\Local\Temp\u1ek.0.exe
      "C:\Users\Admin\AppData\Local\Temp\u1ek.0.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Loads dropped DLL
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2352
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\BGDBKKFHIE.exe"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1932
        • C:\Users\Admin\AppData\Local\Temp\BGDBKKFHIE.exe
          "C:\Users\Admin\AppData\Local\Temp\BGDBKKFHIE.exe"
          4⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1028
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\System32\cmd.exe" /C ping 2.2.2.2 -n 1 -w 3000 > Nul & Del C:\Users\Admin\AppData\Local\Temp\BGDBKKFHIE.exe
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:1336
            • C:\Windows\SysWOW64\PING.EXE
              ping 2.2.2.2 -n 1 -w 3000
              6⤵
              • Runs ping.exe
              PID:984
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 2352 -s 2100
        3⤵
        • Program crash
        PID:4292
    • C:\Users\Admin\AppData\Local\Temp\u1ek.1.exe
      "C:\Users\Admin\AppData\Local\Temp\u1ek.1.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:4552
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\Temp\Task.bat" "
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3744
        • C:\Windows\SysWOW64\chcp.com
          chcp 1251
          4⤵
            PID:2640
          • C:\Windows\SysWOW64\schtasks.exe
            schtasks /create /tn "MalayamaraUpdate" /tr "'C:\Users\Admin\AppData\Local\Temp\Updater.exe'" /sc minute /mo 30 /F
            4⤵
            • Creates scheduled task(s)
            PID:3600
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 1820 -s 1548
        2⤵
        • Program crash
        PID:4804
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 1820 -ip 1820
      1⤵
        PID:4036
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 2352 -ip 2352
        1⤵
          PID:2292

        Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

              Loading Replay Monitor...

              Downloads

              • C:\ProgramData\Are.docx

                Filesize

                11KB

                MD5

                a33e5b189842c5867f46566bdbf7a095

                SHA1

                e1c06359f6a76da90d19e8fd95e79c832edb3196

                SHA256

                5abf8e3d1f78de7b09d7f6fb87f9e80e60caacf13ef3c1289665653dacd7c454

                SHA512

                f2ad3812ec9b915e9618539b0f103f2e9acaad25fbbacd84941c954ce070af231324e83a4621e951c1dbae8d40d50410954e40dd52bbd46e34c54b0d1957407b

              • C:\ProgramData\mozglue.dll

                Filesize

                593KB

                MD5

                c8fd9be83bc728cc04beffafc2907fe9

                SHA1

                95ab9f701e0024cedfbd312bcfe4e726744c4f2e

                SHA256

                ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

                SHA512

                fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

              • C:\ProgramData\nss3.dll

                Filesize

                2.0MB

                MD5

                1cc453cdf74f31e4d913ff9c10acdde2

                SHA1

                6e85eae544d6e965f15fa5c39700fa7202f3aafe

                SHA256

                ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

                SHA512

                dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

              • C:\Users\Admin\AppData\Local\Temp\BGDBKKFHIE.exe

                Filesize

                101KB

                MD5

                42b838cf8bdf67400525e128d917f6e0

                SHA1

                a578f6faec738912dba8c41e7abe1502c46d0cae

                SHA256

                0e4ffba62ce9a464aa1b7ff9f1e55ace8f51ff1e15102d856f801a81f8b4607d

                SHA512

                f64b39d885375251ab7db72c57dc5b5095f0c6412169f1035d1f6a25b8415a2a01004d06bfa0267cf683ef7dea7a9f969ad43fde5a4376f1fcb65a57403433c0

              • C:\Users\Admin\AppData\Local\Temp\u1ek.0.exe

                Filesize

                252KB

                MD5

                5ca6555f005d1c04d1febb75e5850f42

                SHA1

                b40bf9c91b3d340b9715ad5ceedc8b66c4fb39b0

                SHA256

                ad789822f1dafe4314591bc5350ca522e309174dbc8293fe2c642574a3008b00

                SHA512

                2017377abe73c167c5e8cf2d27bd6604107d5e45c2c98bccc4f49f0b61a61eda39c38c5c58caf5d745db9b42f3bdf8012ada11aa704a0a3cf6f961079adb1e8e

              • C:\Users\Admin\AppData\Local\Temp\u1ek.1.exe

                Filesize

                1.7MB

                MD5

                eee5ddcffbed16222cac0a1b4e2e466e

                SHA1

                28b40c88b8ea50b0782e2bcbb4cc0f411035f3d5

                SHA256

                2a40e5dccc7526c4982334941c90f95374460e2a816e84e724e98c4d52ae8c54

                SHA512

                8f88901f3ebd425818db09f268df19ccf8a755603f04e9481bcf02b112a84393f8a900ead77f8f971bfa33fd9fa5636b7494aaee864a0fb04e3273911a4216dc

              • C:\Users\Admin\AppData\Roaming\Temp\Task.bat

                Filesize

                128B

                MD5

                11bb3db51f701d4e42d3287f71a6a43e

                SHA1

                63a4ee82223be6a62d04bdfe40ef8ba91ae49a86

                SHA256

                6be22058abfb22b40a42fb003f86b89e204a83024c03eb82cd53e2a0a047c331

                SHA512

                907ad2c070cc1db89f43459a94d7f48985d939d749c9648b78572a266f0d3fde47813a129e9151dbf4a7d96d36f588172f57c88b8b947b56ed818d7d068abab2

              • memory/1028-137-0x00000000004E0000-0x00000000004FE000-memory.dmp

                Filesize

                120KB

              • memory/1028-146-0x0000000004F40000-0x0000000004F50000-memory.dmp

                Filesize

                64KB

              • memory/1028-145-0x0000000072310000-0x0000000072AC0000-memory.dmp

                Filesize

                7.7MB

              • memory/1028-140-0x0000000004F40000-0x0000000004F50000-memory.dmp

                Filesize

                64KB

              • memory/1028-138-0x0000000072310000-0x0000000072AC0000-memory.dmp

                Filesize

                7.7MB

              • memory/1820-1-0x0000000000720000-0x0000000000820000-memory.dmp

                Filesize

                1024KB

              • memory/1820-36-0x0000000000630000-0x000000000069F000-memory.dmp

                Filesize

                444KB

              • memory/1820-35-0x0000000000400000-0x00000000004A4000-memory.dmp

                Filesize

                656KB

              • memory/1820-15-0x0000000000400000-0x00000000004A4000-memory.dmp

                Filesize

                656KB

              • memory/1820-3-0x0000000000400000-0x00000000004A4000-memory.dmp

                Filesize

                656KB

              • memory/1820-2-0x0000000000630000-0x000000000069F000-memory.dmp

                Filesize

                444KB

              • memory/2352-29-0x0000000000770000-0x0000000000870000-memory.dmp

                Filesize

                1024KB

              • memory/2352-70-0x0000000000400000-0x000000000063B000-memory.dmp

                Filesize

                2.2MB

              • memory/2352-30-0x00000000006D0000-0x00000000006F7000-memory.dmp

                Filesize

                156KB

              • memory/2352-121-0x0000000000770000-0x0000000000870000-memory.dmp

                Filesize

                1024KB

              • memory/2352-122-0x0000000000400000-0x000000000063B000-memory.dmp

                Filesize

                2.2MB

              • memory/2352-124-0x0000000000400000-0x000000000063B000-memory.dmp

                Filesize

                2.2MB

              • memory/2352-31-0x0000000000400000-0x000000000063B000-memory.dmp

                Filesize

                2.2MB

              • memory/2352-110-0x0000000000400000-0x000000000063B000-memory.dmp

                Filesize

                2.2MB

              • memory/2352-135-0x0000000000400000-0x000000000063B000-memory.dmp

                Filesize

                2.2MB

              • memory/2352-37-0x0000000061E00000-0x0000000061EF3000-memory.dmp

                Filesize

                972KB

              • memory/4552-83-0x0000000000400000-0x0000000000930000-memory.dmp

                Filesize

                5.2MB

              • memory/4552-120-0x0000000000B10000-0x0000000000B11000-memory.dmp

                Filesize

                4KB

              • memory/4552-27-0x0000000000B10000-0x0000000000B11000-memory.dmp

                Filesize

                4KB

              • memory/4552-26-0x0000000000400000-0x0000000000930000-memory.dmp

                Filesize

                5.2MB