Analysis

  • max time kernel
    144s
  • max time network
    147s
  • platform
    windows10_x64
  • resource
    win10-en-20210920
  • submitted
    26-09-2021 20:03

General

  • Target

    42752f5ad56e5b7db47f5cade7e84abc.exe

  • Size

    852KB

  • MD5

    42752f5ad56e5b7db47f5cade7e84abc

  • SHA1

    e1cb9c502536f14f0760c4404b307a4804cb14c8

  • SHA256

    926962feeeae5258e6d7bc03c9561cb19912e44b587a1eb30f54f52db479254c

  • SHA512

    bd41b3d06af5fce351309c6fc05a77aed088be5726a7cfe5b76b2fd05eb962d53c8733adb33ee066fd562d069b4805792aecf280b1f74994f97f7be3db11aa6b

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.mail.ru
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    PxhrKDkvikRcSaP2dkv9

Extracted

Family

oski

C2

schulenburgrvpark.com

Signatures

  • AgentTesla

    Agent Tesla is a remote access tool (RAT) written in visual basic.

  • Oski

    Oski is an infostealer targeting browser data, crypto wallets.

  • suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)

    suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)

  • suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile

    suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile

  • suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil

    suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil

  • AgentTesla Payload 3 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 3 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 local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • Reads user/profile data of web browsers 2 TTPs

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

  • 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.

  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 1 IoCs

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

  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

  • Kills process with taskkill 1 IoCs
  • Modifies registry class 9 IoCs
  • Suspicious behavior: EnumeratesProcesses 14 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 41 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\42752f5ad56e5b7db47f5cade7e84abc.exe
    "C:\Users\Admin\AppData\Local\Temp\42752f5ad56e5b7db47f5cade7e84abc.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2384
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\42752f5ad56e5b7db47f5cade7e84abc.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:512
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\tlZLQDWEhCq" /XML "C:\Users\Admin\AppData\Local\Temp\tmp108B.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1472
    • C:\Users\Admin\AppData\Local\Temp\42752f5ad56e5b7db47f5cade7e84abc.exe
      "C:\Users\Admin\AppData\Local\Temp\42752f5ad56e5b7db47f5cade7e84abc.exe"
      2⤵
        PID:1088
      • C:\Users\Admin\AppData\Local\Temp\42752f5ad56e5b7db47f5cade7e84abc.exe
        "C:\Users\Admin\AppData\Local\Temp\42752f5ad56e5b7db47f5cade7e84abc.exe"
        2⤵
        • Adds Run key to start application
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:1948
        • C:\Users\Admin\AppData\Local\Temp\app.exe
          "C:\Users\Admin\AppData\Local\Temp\app.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1468
          • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
            "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\app.exe"
            4⤵
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:980
          • C:\Windows\SysWOW64\schtasks.exe
            "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\vhdkcrwsNOIJ" /XML "C:\Users\Admin\AppData\Local\Temp\tmp4C76.tmp"
            4⤵
            • Creates scheduled task(s)
            PID:1668
          • C:\Users\Admin\AppData\Local\Temp\app.exe
            "C:\Users\Admin\AppData\Local\Temp\app.exe"
            4⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Checks processor information in registry
            • Suspicious use of WriteProcessMemory
            PID:3940
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\System32\cmd.exe" /c taskkill /pid 3940 & erase C:\Users\Admin\AppData\Local\Temp\app.exe & RD /S /Q C:\\ProgramData\\736194751312495\\* & exit
              5⤵
              • Suspicious use of WriteProcessMemory
              PID:2752
              • C:\Windows\SysWOW64\taskkill.exe
                taskkill /pid 3940
                6⤵
                • Kills process with taskkill
                • Suspicious use of AdjustPrivilegeToken
                PID:1196

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

      MD5

      db01a2c1c7e70b2b038edf8ad5ad9826

      SHA1

      540217c647a73bad8d8a79e3a0f3998b5abd199b

      SHA256

      413da361d77055dae7007f82b58b366c8783aa72e0b8fbe41519b940c253b38d

      SHA512

      c76ff57fcee5cdf9fdf3116d4e1dc0cf106867bf19ab474b763e242acf5dca9a7509cb837c35e130c3e056636b4e8a4e135512a978bcd3dd641e20f5bf76c3d6

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

      MD5

      f826d8accdaa99a82568095d1aa20144

      SHA1

      ded681e0340aa4c80d1bc34d81b7bad84dbea41e

      SHA256

      dfc263ddf7a64e06657290d89ba96aa3e4af667f71278e5d8290240bdb414ab5

      SHA512

      aef0423138b9c90ecaed1aa48972a07fbbf0fcfac794c7b57ce70692d7e4746195cee1dc23d28ac6f75157996d7c194f0b9ff95658787489c0beecfd666bdef4

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

      MD5

      9a1c9056f35e3923800d334987f671e4

      SHA1

      919904d34d8992084e2646b6243872698d7e72d3

      SHA256

      cb282f663b4ad5bbe80246cb866afafea7b90aa3219ba62f1aac5f22c6b6040f

      SHA512

      5e45a87974b6d41d38b247d79bd63bd58ae679836b37d3a3e30234a9cb7f31aadad66e3f90e419b9e4e890314573f2868fd98660f2ed82f05a175febfdb6be09

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

      MD5

      9a1c9056f35e3923800d334987f671e4

      SHA1

      919904d34d8992084e2646b6243872698d7e72d3

      SHA256

      cb282f663b4ad5bbe80246cb866afafea7b90aa3219ba62f1aac5f22c6b6040f

      SHA512

      5e45a87974b6d41d38b247d79bd63bd58ae679836b37d3a3e30234a9cb7f31aadad66e3f90e419b9e4e890314573f2868fd98660f2ed82f05a175febfdb6be09

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

      MD5

      9a1c9056f35e3923800d334987f671e4

      SHA1

      919904d34d8992084e2646b6243872698d7e72d3

      SHA256

      cb282f663b4ad5bbe80246cb866afafea7b90aa3219ba62f1aac5f22c6b6040f

      SHA512

      5e45a87974b6d41d38b247d79bd63bd58ae679836b37d3a3e30234a9cb7f31aadad66e3f90e419b9e4e890314573f2868fd98660f2ed82f05a175febfdb6be09

    • \ProgramData\mozglue.dll

      MD5

      8f73c08a9660691143661bf7332c3c27

      SHA1

      37fa65dd737c50fda710fdbde89e51374d0c204a

      SHA256

      3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

      SHA512

      0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

    • \ProgramData\nss3.dll

      MD5

      bfac4e3c5908856ba17d41edcd455a51

      SHA1

      8eec7e888767aa9e4cca8ff246eb2aacb9170428

      SHA256

      e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

      SHA512

      2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

    • \ProgramData\sqlite3.dll

      MD5

      e477a96c8f2b18d6b5c27bde49c990bf

      SHA1

      e980c9bf41330d1e5bd04556db4646a0210f7409

      SHA256

      16574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660

      SHA512

      335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c

    • memory/512-240-0x0000000006DC3000-0x0000000006DC4000-memory.dmp

      Filesize

      4KB

    • memory/512-163-0x0000000008FC0000-0x0000000008FC1000-memory.dmp

      Filesize

      4KB

    • memory/512-126-0x0000000000000000-mapping.dmp

    • memory/512-369-0x0000000009490000-0x0000000009491000-memory.dmp

      Filesize

      4KB

    • memory/512-363-0x00000000094B0000-0x00000000094B1000-memory.dmp

      Filesize

      4KB

    • memory/512-169-0x0000000009550000-0x0000000009551000-memory.dmp

      Filesize

      4KB

    • memory/512-132-0x0000000004740000-0x0000000004741000-memory.dmp

      Filesize

      4KB

    • memory/512-134-0x0000000007400000-0x0000000007401000-memory.dmp

      Filesize

      4KB

    • memory/512-138-0x0000000007190000-0x0000000007191000-memory.dmp

      Filesize

      4KB

    • memory/512-139-0x0000000007270000-0x0000000007271000-memory.dmp

      Filesize

      4KB

    • memory/512-141-0x0000000007C50000-0x0000000007C51000-memory.dmp

      Filesize

      4KB

    • memory/512-142-0x0000000006DC0000-0x0000000006DC1000-memory.dmp

      Filesize

      4KB

    • memory/512-143-0x0000000006DC2000-0x0000000006DC3000-memory.dmp

      Filesize

      4KB

    • memory/512-168-0x0000000009330000-0x0000000009331000-memory.dmp

      Filesize

      4KB

    • memory/512-145-0x0000000007320000-0x0000000007321000-memory.dmp

      Filesize

      4KB

    • memory/512-146-0x0000000008490000-0x0000000008491000-memory.dmp

      Filesize

      4KB

    • memory/512-147-0x0000000008280000-0x0000000008281000-memory.dmp

      Filesize

      4KB

    • memory/512-155-0x00000000091E0000-0x0000000009213000-memory.dmp

      Filesize

      204KB

    • memory/512-157-0x000000007E420000-0x000000007E421000-memory.dmp

      Filesize

      4KB

    • memory/980-416-0x0000000008490000-0x0000000008491000-memory.dmp

      Filesize

      4KB

    • memory/980-419-0x0000000006F80000-0x0000000006F81000-memory.dmp

      Filesize

      4KB

    • memory/980-420-0x0000000006F82000-0x0000000006F83000-memory.dmp

      Filesize

      4KB

    • memory/980-510-0x000000007E660000-0x000000007E661000-memory.dmp

      Filesize

      4KB

    • memory/980-400-0x0000000000000000-mapping.dmp

    • memory/980-413-0x0000000007FA0000-0x0000000007FA1000-memory.dmp

      Filesize

      4KB

    • memory/980-511-0x0000000006F83000-0x0000000006F84000-memory.dmp

      Filesize

      4KB

    • memory/1196-661-0x0000000000000000-mapping.dmp

    • memory/1468-389-0x00000000002D0000-0x00000000002D1000-memory.dmp

      Filesize

      4KB

    • memory/1468-386-0x0000000000000000-mapping.dmp

    • memory/1468-395-0x0000000004E90000-0x0000000004E97000-memory.dmp

      Filesize

      28KB

    • memory/1468-396-0x0000000004C70000-0x000000000516E000-memory.dmp

      Filesize

      5.0MB

    • memory/1468-398-0x0000000007070000-0x00000000070DC000-memory.dmp

      Filesize

      432KB

    • memory/1468-399-0x00000000070E0000-0x000000000711C000-memory.dmp

      Filesize

      240KB

    • memory/1472-127-0x0000000000000000-mapping.dmp

    • memory/1668-401-0x0000000000000000-mapping.dmp

    • memory/1948-384-0x0000000005A30000-0x0000000005A31000-memory.dmp

      Filesize

      4KB

    • memory/1948-130-0x0000000000400000-0x000000000043C000-memory.dmp

      Filesize

      240KB

    • memory/1948-663-0x00000000055B0000-0x0000000005AAE000-memory.dmp

      Filesize

      5.0MB

    • memory/1948-131-0x00000000004377DE-mapping.dmp

    • memory/1948-144-0x00000000055B0000-0x0000000005AAE000-memory.dmp

      Filesize

      5.0MB

    • memory/2384-124-0x0000000007C90000-0x0000000007CFD000-memory.dmp

      Filesize

      436KB

    • memory/2384-123-0x0000000007A50000-0x0000000007A51000-memory.dmp

      Filesize

      4KB

    • memory/2384-121-0x0000000005C00000-0x0000000005C01000-memory.dmp

      Filesize

      4KB

    • memory/2384-115-0x0000000000530000-0x0000000000531000-memory.dmp

      Filesize

      4KB

    • memory/2384-122-0x0000000007970000-0x000000000798D000-memory.dmp

      Filesize

      116KB

    • memory/2384-125-0x0000000007D90000-0x0000000007DD3000-memory.dmp

      Filesize

      268KB

    • memory/2384-117-0x00000000053E0000-0x00000000053E1000-memory.dmp

      Filesize

      4KB

    • memory/2384-120-0x0000000004ED0000-0x0000000004ED1000-memory.dmp

      Filesize

      4KB

    • memory/2384-119-0x0000000004F80000-0x0000000004F81000-memory.dmp

      Filesize

      4KB

    • memory/2384-118-0x0000000004EE0000-0x0000000004EE1000-memory.dmp

      Filesize

      4KB

    • memory/2752-660-0x0000000000000000-mapping.dmp

    • memory/3940-402-0x0000000000400000-0x0000000000438000-memory.dmp

      Filesize

      224KB

    • memory/3940-403-0x000000000040717B-mapping.dmp

    • memory/3940-418-0x0000000000400000-0x0000000000438000-memory.dmp

      Filesize

      224KB