Overview

overview

10

Static

static

3

2025-01-29...to.exe

windows7-x64

10

2025-01-29...to.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    119s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    29-01-2025 00:24

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General

  • Target

    2025-01-29_2be2af23b313b80536e9ca3c12704d6c_mailto.exe

  • Size

    66KB

  • MD5

    2be2af23b313b80536e9ca3c12704d6c

  • SHA1

    5ce36159fb34f79df9bd8ba43afb8c21a059052c

  • SHA256

    16e6fc7f6bf936eda5723551ea9d0aee9d83e265c1e70cc2d66198be8e1400d8

  • SHA512

    384b55e59933ca35a4f6db970e6ac1169e016b40739c7b15f4a592e11fff8c7d4afa730cd2b0b78ad1ea18e29c881028228683b55742be76bbae65102be08853

  • SSDEEP

    1536:Tn2v0CaaFjJn/zk4XHnnzxLhOZ3w4qwiDKKVqmfeL:TIK+N/44XHnzthOZ37qwiDo

Score
10/10
netwalkerdefense_evasiondiscoveryexecutionimpactransomwarespywarestealer

Malware Config

Extracted

Path

C:\Program Files (x86)\Microsoft Office\Office14\3082\367114-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted. All encrypted files for this computer has extension: .367114 -- If for some reason you read this text before the encryption ended, this can be understood by the fact that the computer slows down, and your heart rate has increased due to the ability to turn it off, then we recommend that you move away from the computer and accept that you have been compromised. Rebooting/shutdown will cause you to lose files without the possibility of recovery. -- Our encryption algorithms are very strong and your files are very well protected, the only way to get your files back is to cooperate with us and get the decrypter program. Do not try to recover your files without a decrypter program, you may damage them and then they will be impossible to recover. For us this is just business and to prove to you our seriousness, we will decrypt you one file for free. Just open our website, upload the encrypted file and get the decrypted file for free. -- Steps to get access on our website: 1.Download and install tor-browser: https://torproject.org/ 2.Open our website: rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion 3.Put your personal code in the input form: {code_367114: 90B6RLEoeTLxABSUll76dLO+XtGQax4w+v81njI11AknWpHLnx 48lcVH7/Zceee0Wqv4wSBb7hcFqFTBQajhdvay9Pa1iX4V0o4I +MX5l0s0URJyxpilQ3GXE6TJKn35DBy04BUI7lDONBeZSBAxKA eEqOX9sBwOfsCv7A/StM+Cx8FlZaZvftJ3j/8LraTxXUVkf/mc Tly0dJvZ8sH5bGxmOItegwoH4PSYeC3R/h//PvfhSVPVCmjcCx AVwz498RJsu5DS/ikOPBorUkSOYdwJT+JyeeJT+Q==}
URLs

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Signatures

  • Netwalker Ransomware

    Ransomware family with multiple versions. Also known as MailTo.

    ransomwarenetwalker
  • Netwalker family
    netwalker
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomwaredefense_evasionimpactexecution
  • Renames multiple (7436) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

    ransomware
  • Deletes itself 1 IoCs
  • Reads user/profile data of web browsers 3 TTPs

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

    spywarestealer
  • Drops file in Program Files directory 64 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • Interacts with shadow copies 3 TTPs 1 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

    ransomware
  • Kills process with taskkill 1 IoCs
    defense_evasion
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware

Processes

  • C:\Users\Admin\AppData\Local\Temp\2025-01-29_2be2af23b313b80536e9ca3c12704d6c_mailto.exe
    "C:\Users\Admin\AppData\Local\Temp\2025-01-29_2be2af23b313b80536e9ca3c12704d6c_mailto.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2900
    • C:\Windows\system32\vssadmin.exe
      C:\Windows\system32\vssadmin.exe delete shadows /all /quiet
      2⤵
      • Interacts with shadow copies
      PID:540
    • C:\Windows\SysWOW64\notepad.exe
      C:\Windows\system32\notepad.exe "C:\Users\Admin\Desktop\367114-Readme.txt"
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1524
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c "C:\Users\Admin\AppData\Local\Temp\AB7B.tmp.bat"
      2⤵
      • Deletes itself
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2372
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /F /PID 2900
        3⤵
        • System Location Discovery: System Language Discovery
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:648
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:3412

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Program Files (x86)\Microsoft Office\Office14\3082\367114-Readme.txt
    Filesize

    1KB

    MD5

    849de66936e304b7210c16ef8b4c1787

    SHA1

    db05f252a9d9cea3e6cf723a6b4e7b829a33cfd5

    SHA256

    4a2f649e14a0a1a86a52e77ff54b5d2e5483fd9d95b72383aab703995ffe5b53

    SHA512

    ba725b952ac11206bc929f3ef4b75ccb98f79f591d6ad7eee0c6381afb8bbbc0ba1485be3a46f4b26e73c254ac018961b7bf259f4d053b502abf77ed685ebfc5

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  • C:\ProgramData\Microsoft\Search\Data\Applications\Windows\Projects\SystemIndex\PropMap\CiPT0000.000.367114
    Filesize

    506B

    MD5

    1169f4e615b8287c9b9cba01459f67ff

    SHA1

    e15c939244d187db8a988d0c7d5936ca895eca39

    SHA256

    df185c05bea0f5763194ea996d80ecdaa88f79e0d0125aedc838307242f01892

    SHA512

    f90438d9e37d5d2e6da1a2620ef5508ae5cc9f71146ebb5b27bbd318a3f872e79ff527ba37f4b87a060a39e125ac907d1c2d6f1e1ec7ff84011bbb5d78c2bd1d

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  • C:\Users\Admin\AppData\Local\Temp\AB7B.tmp.bat
    Filesize

    127B

    MD5

    32b53c9f41bd6b6d1e659b6d37c67d5a

    SHA1

    453d5eccc0623c7893c3b7789b2b137dacebda91

    SHA256

    45dbe7bf54d40b6fea096bedf6b615825b05b5e7af89c53665192ae22458abfe

    SHA512

    17caa2b343eb0d53f9539fbd028c9906a0d613be80df8cc81af322c741f5e41a3191f9140f533df1a929f3600deed667a71ac73aed1962af12dc8a3b49ab98c6

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