Analysis

  • max time kernel
    143s
  • max time network
    25s
  • platform
    windows7_x64
  • resource
    win7-en-20210920
  • submitted
    27-09-2021 07:11

General

  • Target

    Purchase Order.xlsx

  • Size

    290KB

  • MD5

    79dbf0cb4518f97174ee4535672a0a60

  • SHA1

    5dd9de078a0945c39431df3bcb44151637331353

  • SHA256

    b61d1249505ff6814c04662bba102938cda38a0062bd78e11839d24cead1f577

  • SHA512

    8f4b5e00c90f960d7b6d931267ec59f28e37a54248ab0bbae5bd94a2cc6ca294cd3ab0065eb8fde2ed32963e5976772ec2ec85f0e79c2635351f935d2d5f01af

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    us2.smtp.mailhostbox.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    )fjqy!s9

Signatures

  • AgentTesla

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

  • Detect Neshta Payload 10 IoCs
  • Modifies system executable filetype association 2 TTPs 1 IoCs
  • Neshta

    Malware from the neshta family is designed to infect itself into other files to spread itself and cause damage.

  • AgentTesla Payload 4 IoCs
  • Blocklisted process makes network request 1 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 5 IoCs
  • Loads dropped DLL 7 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.

  • Uses the VBS compiler for execution 1 TTPs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Launches Equation Editor 1 TTPs 1 IoCs

    Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 6 IoCs
  • Suspicious use of WriteProcessMemory 33 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde "C:\Users\Admin\AppData\Local\Temp\Purchase Order.xlsx"
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:1356
  • C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
    "C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
    1⤵
    • Blocklisted process makes network request
    • Loads dropped DLL
    • Launches Equation Editor
    • Suspicious use of WriteProcessMemory
    PID:1592
    • C:\Users\Public\vbc.exe
      "C:\Users\Public\vbc.exe"
      2⤵
      • Modifies system executable filetype association
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Drops file in Windows directory
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:1464
      • C:\Users\Admin\AppData\Local\Temp\3582-490\vbc.exe
        "C:\Users\Admin\AppData\Local\Temp\3582-490\vbc.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:428
        • C:\Windows\svchost.com
          "C:\Windows\svchost.com" "C:\Windows\System32\WINDOW~1\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\3582-490\vbc.exe"
          4⤵
          • Executes dropped EXE
          • Drops file in Windows directory
          • Suspicious use of WriteProcessMemory
          PID:1152
          • C:\Windows\SysWOW64\WINDOW~1\v1.0\powershell.exe
            C:\Windows\System32\WINDOW~1\v1.0\powershell.exe Add-MpPreference -ExclusionPath C:\Users\Admin\AppData\Local\Temp\3582-490\vbc.exe
            5⤵
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:1756
        • C:\Windows\svchost.com
          "C:\Windows\svchost.com" "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\DasQupfvgQ" /XML "C:\Users\Admin\AppData\Local\Temp\tmp8989.tmp"
          4⤵
          • Executes dropped EXE
          • Drops file in Windows directory
          • Suspicious use of WriteProcessMemory
          PID:1584
          • C:\Windows\SysWOW64\schtasks.exe
            C:\Windows\System32\schtasks.exe /Create /TN Updates\DasQupfvgQ /XML C:\Users\Admin\AppData\Local\Temp\tmp8989.tmp
            5⤵
            • Creates scheduled task(s)
            PID:1112
        • C:\Users\Admin\AppData\Local\Temp\3582-490\vbc.exe
          "C:\Users\Admin\AppData\Local\Temp\3582-490\vbc.exe"
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          PID:1612

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\MICROS~1\Windows\TEMPOR~1\Content.IE5\K8CH4PHC\MALCOM~1.EXE
    MD5

    1ad95ef0201298ba4966062d800ae957

    SHA1

    855db465c5aa7dc416a0fad8e55cebb1c8a46363

    SHA256

    784caaac6239bb681860dfd26ecff2f584342e2454bfb2ec807706d0ffd31731

    SHA512

    fa3f8619a34822f2c2adaf6828382c9647187bf73c063bd1cb33f062271429b610787256aa93d51055dc5f1c3e256e92bc526f8a17ce3a26f46595547759a6ba

  • C:\Users\Admin\AppData\Local\Temp\3582-490\vbc.exe
    MD5

    6427002ddf28933e5df19b7b8dcb159a

    SHA1

    138ff1f042b2f5984a8b57939d8586b26127e729

    SHA256

    4b2d34c642b7459d86399786f7e239e8528b4ac4f261aa974251fa634fc24cc0

    SHA512

    cd746bb9ba5fe1fe3704e624a8ae9e4b0c6d9a20f2f3939fca9821d6c3c4e8c668ac3450244c02838239867274ec9eeb4ba2b29da582ca715148f7301cfecd09

  • C:\Users\Admin\AppData\Local\Temp\3582-490\vbc.exe
    MD5

    6427002ddf28933e5df19b7b8dcb159a

    SHA1

    138ff1f042b2f5984a8b57939d8586b26127e729

    SHA256

    4b2d34c642b7459d86399786f7e239e8528b4ac4f261aa974251fa634fc24cc0

    SHA512

    cd746bb9ba5fe1fe3704e624a8ae9e4b0c6d9a20f2f3939fca9821d6c3c4e8c668ac3450244c02838239867274ec9eeb4ba2b29da582ca715148f7301cfecd09

  • C:\Users\Admin\AppData\Local\Temp\3582-490\vbc.exe
    MD5

    6427002ddf28933e5df19b7b8dcb159a

    SHA1

    138ff1f042b2f5984a8b57939d8586b26127e729

    SHA256

    4b2d34c642b7459d86399786f7e239e8528b4ac4f261aa974251fa634fc24cc0

    SHA512

    cd746bb9ba5fe1fe3704e624a8ae9e4b0c6d9a20f2f3939fca9821d6c3c4e8c668ac3450244c02838239867274ec9eeb4ba2b29da582ca715148f7301cfecd09

  • C:\Users\Admin\AppData\Local\Temp\tmp5023.tmp
    MD5

    698d949ab906339fb0315f5920a96d0a

    SHA1

    8a55c1ef697e099706bbb2d94b4f3f5fcdec9c83

    SHA256

    3c931dc63294d70c8533b73d4298053a8ca78613f4bf8708bc7d5e52b287671f

    SHA512

    50b470862b2dda162a97e32a0d37d419ca7ab31773528de56f48d666d3a21d721fae63172cad952af4c147ffe340446e075e78f3d52a68c7fd40c1c577716e82

  • C:\Users\Public\vbc.exe
    MD5

    1ad95ef0201298ba4966062d800ae957

    SHA1

    855db465c5aa7dc416a0fad8e55cebb1c8a46363

    SHA256

    784caaac6239bb681860dfd26ecff2f584342e2454bfb2ec807706d0ffd31731

    SHA512

    fa3f8619a34822f2c2adaf6828382c9647187bf73c063bd1cb33f062271429b610787256aa93d51055dc5f1c3e256e92bc526f8a17ce3a26f46595547759a6ba

  • C:\Users\Public\vbc.exe
    MD5

    1ad95ef0201298ba4966062d800ae957

    SHA1

    855db465c5aa7dc416a0fad8e55cebb1c8a46363

    SHA256

    784caaac6239bb681860dfd26ecff2f584342e2454bfb2ec807706d0ffd31731

    SHA512

    fa3f8619a34822f2c2adaf6828382c9647187bf73c063bd1cb33f062271429b610787256aa93d51055dc5f1c3e256e92bc526f8a17ce3a26f46595547759a6ba

  • C:\Windows\directx.sys
    MD5

    7779b7aac555eb734d1d878a0dfce1e2

    SHA1

    4216e4f627f3933d918ae4b86683e205e630d3a5

    SHA256

    62263e548942d1b55bc1f1c79489ddf0fc111a11df3660b30e202a8472fc7331

    SHA512

    e9608bb14045f4789c367771fd2a043a13e9732dd3daa4bd41bed753f46d9e0334d4af9bff59a755e8511988dea3b3a88f887940a09668eff07eb7e4b2ad209b

  • C:\Windows\svchost.com
    MD5

    ac3aa03e4370013a0dfd295363e22ec7

    SHA1

    320ad9813cd7be1a24f2b530af1edc52f5ea76b1

    SHA256

    821cbd807979771a80287ae994b20bfb3fb5f5fc3ce74dbaf588aa8797179181

    SHA512

    e05630d9f11951e31338bcb492c09214b9d2f68a8553c525400b9b0966239804a1332241a397d8d0a6bf3b2b21937aa1140c74aa44ea0b5d0d9739417d9095a8

  • C:\Windows\svchost.com
    MD5

    ac3aa03e4370013a0dfd295363e22ec7

    SHA1

    320ad9813cd7be1a24f2b530af1edc52f5ea76b1

    SHA256

    821cbd807979771a80287ae994b20bfb3fb5f5fc3ce74dbaf588aa8797179181

    SHA512

    e05630d9f11951e31338bcb492c09214b9d2f68a8553c525400b9b0966239804a1332241a397d8d0a6bf3b2b21937aa1140c74aa44ea0b5d0d9739417d9095a8

  • C:\Windows\svchost.com
    MD5

    ac3aa03e4370013a0dfd295363e22ec7

    SHA1

    320ad9813cd7be1a24f2b530af1edc52f5ea76b1

    SHA256

    821cbd807979771a80287ae994b20bfb3fb5f5fc3ce74dbaf588aa8797179181

    SHA512

    e05630d9f11951e31338bcb492c09214b9d2f68a8553c525400b9b0966239804a1332241a397d8d0a6bf3b2b21937aa1140c74aa44ea0b5d0d9739417d9095a8

  • \PROGRA~2\Adobe\READER~1.0\Reader\LOGTRA~1.EXE
    MD5

    9e2b9928c89a9d0da1d3e8f4bd96afa7

    SHA1

    ec66cda99f44b62470c6930e5afda061579cde35

    SHA256

    8899b4ed3446b7d55b54defbc1acb7c5392a4b3bc8ec2cdc7c31171708965043

    SHA512

    2ca5ad1d0e12a8049de885b90b7f56fe77c868e0d6dae4ec4b6f3bc0bf7b2e73295cc9b1328c2b45357ffb0d7804622ab3f91a56140b098e93b691032d508156

  • \Users\Admin\AppData\Local\Temp\3582-490\vbc.exe
    MD5

    6427002ddf28933e5df19b7b8dcb159a

    SHA1

    138ff1f042b2f5984a8b57939d8586b26127e729

    SHA256

    4b2d34c642b7459d86399786f7e239e8528b4ac4f261aa974251fa634fc24cc0

    SHA512

    cd746bb9ba5fe1fe3704e624a8ae9e4b0c6d9a20f2f3939fca9821d6c3c4e8c668ac3450244c02838239867274ec9eeb4ba2b29da582ca715148f7301cfecd09

  • \Users\Admin\AppData\Local\Temp\3582-490\vbc.exe
    MD5

    6427002ddf28933e5df19b7b8dcb159a

    SHA1

    138ff1f042b2f5984a8b57939d8586b26127e729

    SHA256

    4b2d34c642b7459d86399786f7e239e8528b4ac4f261aa974251fa634fc24cc0

    SHA512

    cd746bb9ba5fe1fe3704e624a8ae9e4b0c6d9a20f2f3939fca9821d6c3c4e8c668ac3450244c02838239867274ec9eeb4ba2b29da582ca715148f7301cfecd09

  • \Users\Public\vbc.exe
    MD5

    1ad95ef0201298ba4966062d800ae957

    SHA1

    855db465c5aa7dc416a0fad8e55cebb1c8a46363

    SHA256

    784caaac6239bb681860dfd26ecff2f584342e2454bfb2ec807706d0ffd31731

    SHA512

    fa3f8619a34822f2c2adaf6828382c9647187bf73c063bd1cb33f062271429b610787256aa93d51055dc5f1c3e256e92bc526f8a17ce3a26f46595547759a6ba

  • \Users\Public\vbc.exe
    MD5

    1ad95ef0201298ba4966062d800ae957

    SHA1

    855db465c5aa7dc416a0fad8e55cebb1c8a46363

    SHA256

    784caaac6239bb681860dfd26ecff2f584342e2454bfb2ec807706d0ffd31731

    SHA512

    fa3f8619a34822f2c2adaf6828382c9647187bf73c063bd1cb33f062271429b610787256aa93d51055dc5f1c3e256e92bc526f8a17ce3a26f46595547759a6ba

  • \Users\Public\vbc.exe
    MD5

    1ad95ef0201298ba4966062d800ae957

    SHA1

    855db465c5aa7dc416a0fad8e55cebb1c8a46363

    SHA256

    784caaac6239bb681860dfd26ecff2f584342e2454bfb2ec807706d0ffd31731

    SHA512

    fa3f8619a34822f2c2adaf6828382c9647187bf73c063bd1cb33f062271429b610787256aa93d51055dc5f1c3e256e92bc526f8a17ce3a26f46595547759a6ba

  • \Users\Public\vbc.exe
    MD5

    1ad95ef0201298ba4966062d800ae957

    SHA1

    855db465c5aa7dc416a0fad8e55cebb1c8a46363

    SHA256

    784caaac6239bb681860dfd26ecff2f584342e2454bfb2ec807706d0ffd31731

    SHA512

    fa3f8619a34822f2c2adaf6828382c9647187bf73c063bd1cb33f062271429b610787256aa93d51055dc5f1c3e256e92bc526f8a17ce3a26f46595547759a6ba

  • memory/428-72-0x0000000004CF0000-0x0000000004CF1000-memory.dmp
    Filesize

    4KB

  • memory/428-74-0x0000000000690000-0x00000000006AD000-memory.dmp
    Filesize

    116KB

  • memory/428-70-0x0000000000D20000-0x0000000000D21000-memory.dmp
    Filesize

    4KB

  • memory/428-76-0x0000000005040000-0x00000000050B2000-memory.dmp
    Filesize

    456KB

  • memory/428-77-0x0000000004D30000-0x0000000004D75000-memory.dmp
    Filesize

    276KB

  • memory/428-67-0x0000000000000000-mapping.dmp
  • memory/1112-92-0x0000000000000000-mapping.dmp
  • memory/1152-79-0x0000000000000000-mapping.dmp
  • memory/1356-55-0x0000000071A71000-0x0000000071A73000-memory.dmp
    Filesize

    8KB

  • memory/1356-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/1356-102-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/1356-54-0x000000002FFA1000-0x000000002FFA4000-memory.dmp
    Filesize

    12KB

  • memory/1464-62-0x0000000000000000-mapping.dmp
  • memory/1584-85-0x0000000000000000-mapping.dmp
  • memory/1592-57-0x0000000076A81000-0x0000000076A83000-memory.dmp
    Filesize

    8KB

  • memory/1612-94-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1612-88-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1612-90-0x00000000004375EE-mapping.dmp
  • memory/1612-98-0x0000000004B40000-0x0000000004B41000-memory.dmp
    Filesize

    4KB

  • memory/1612-103-0x0000000004B41000-0x0000000004B42000-memory.dmp
    Filesize

    4KB

  • memory/1756-82-0x0000000000000000-mapping.dmp
  • memory/1756-97-0x00000000024E0000-0x000000000312A000-memory.dmp
    Filesize

    12.3MB

  • memory/1756-99-0x00000000024E0000-0x000000000312A000-memory.dmp
    Filesize

    12.3MB

  • memory/1756-96-0x00000000024E0000-0x000000000312A000-memory.dmp
    Filesize

    12.3MB

  • memory/1756-100-0x0000000002350000-0x0000000002393000-memory.dmp
    Filesize

    268KB

  • memory/1756-101-0x0000000004CA0000-0x0000000004F72000-memory.dmp
    Filesize

    2.8MB