Overview

overview

10

Static

static

10

IRSdeclara...od.exe

windows7_x64

10

IRSdeclara...od.exe

windows10_x64

10

Resubmissions

15-10-2020 13:59

201015-d11m2zjdgs 10

13-03-2020 03:32

200313-8w7dt2yb5n 9

Analysis

  • max time kernel
    82s
  • max time network
    33s
  • platform
    windows7_x64
  • resource
    win7v200722
  • submitted
    15-10-2020 13:59

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General

  • Target

    IRSdeclaration‮cod.exe

  • Size

    282KB

  • MD5

    fe3fd53ddc7c229b1150d970a05947c0

  • SHA1

    3abeddbbbd29310290955cc7c1a895550c92ab96

  • SHA256

    c414bbb789af8e3fb93b33344b31f1991582ec0f06558b29a3178d2b02465c72

  • SHA512

    8b94e67f48f90d7a0e463a7623ba6f87a5f4108f33587c8f579f29aa3c9b0a22f7e134470824d25dccb552bfc868b18cd3f05ef09aaceef2bab6984c21f203b4

Score
10/10
ransomwarenetwalkerspywarepersistence

Malware Config

Extracted

Path

C:\ProgramData\Package Cache\{f4220b74-9edd-4ded-bc8b-0342c1e164d8}\FD6F5D-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .fd6f5d -- 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_fd6f5d: l/Fk05gcV+GUCD0bIg74onLdc73bTB+ghYzoOM0ZflBrMzLu5v kpJgWgMRHgrxJjbeMMAeLd5IOLqdZsGGy8UhMYDlQFiNVv41Zj AnXAqEjZ8Oh8YjoNP8jnZUX15sWv5bzR1agHdKgTgy2ewzcErN bj3a1GUySmish9GBUpQrFNit8yElCXlv3BAf1Gl/qP4hIzZByi IXxk+WIarjMQXdGJEoolV2MtDSCl4e2QD68L7o74z05Z6qD4Gu +MUXV+mvfVfOpwNM3QsgkN/hJ2SvaatSnhQVteXA==}
URLs

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Extracted

Path

C:\Program Files\Microsoft Office\MEDIA\OFFICE14\LINES\FD6F5D-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .fd6f5d -- 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_fd6f5d: l/Fk05gcV+GUCD0bIg74onLdc73bTB+ghYzoOM0ZflBrMzLu5v kpJgWgMRHgrxJjbeMMAeLd5IOLqdZsGGy8UhMYDlQFiNVv41Zj AnXAqEjZ8Oh8YjoNP8jnZUX15sWv5bzR1agHdKgTgy2ewzcErN bj3a1GUySmish9GBUpQrFNit8yElCXlv3BAf1Gl/qP4hIzZByi IXxk+WIarjMQXdGJEoolV2MtDSCl4e2QD68L7o74z05Z6qD4Gu +MUXV+mvfVfOpwNM3QsgkN/hJ2SvaatSnhQVteXA==}Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .fd6f5d -- 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_fd6f5d: l/Fk05gcV+GUCD0bIg74onLdc73bTB+ghYzoOM0ZflBrMzLu5v kpJgWgMRHgrxJjbeMMAeLd5IOLqdZsGGy8UhMYDlQFiNVv41Zj AnXAqEjZ8Oh8YjoNP8jnZUX15sWv5bzR1agHdKgTgy2ewzcErN bj3a1GUySmish9GBUpQrFNit8yElCXlv3BAf1Gl/qP4hIzZByi IXxk+WIarjMQXdGJEoolV2MtDSCl4e2QD68L7o74z05Z6qD4Gu +MUXV+mvfVfOpwNM3QsgkN/hJ2SvaatSnhQVteXA==}Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .fd6f5d -- 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_fd6f5d: l/Fk05gcV+GUCD0bIg74onLdc73bTB+ghYzoOM0ZflBrMzLu5v kpJgWgMRHgrxJjbeMMAeLd5IOLqdZsGGy8UhMYDlQFiNVv41Zj AnXAqEjZ8Oh8YjoNP8jnZUX15sWv5bzR1agHdKgTgy2ewzcErN bj3a1GUySmish9GBUpQrFNit8yElCXlv3BAf1Gl/qP4hIzZByi IXxk+WIarjMQXdGJEoolV2MtDSCl4e2QD68L7o74z05Z6qD4Gu +MUXV+mvfVfOpwNM3QsgkN/hJ2SvaatSnhQVteXA==}
URLs

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Extracted

Path

C:\Program Files\Microsoft Office\MEDIA\CAGCAT10\FD6F5D-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .fd6f5d -- 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_fd6f5d: l/Fk05gcV+GUCD0bIg74onLdc73bTB+ghYzoOM0ZflBrMzLu5v kpJgWgMRHgrxJjbeMMAeLd5IOLqdZsGGy8UhMYDlQFiNVv41Zj AnXAqEjZ8Oh8YjoNP8jnZUX15sWv5bzR1agHdKgTgy2ewzcErN bj3a1GUySmish9GBUpQrFNit8yElCXlv3BAf1Gl/qP4hIzZByi IXxk+WIarjMQXdGJEoolV2MtDSCl4e2QD68L7o74z05Z6qD4Gu +MUXV+mvfVfOpwNM3QsgkN/hJ2SvaatSnhQVteXA==}Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .fd6f5d -- 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_fd6f5d: l/Fk05gcV+GUCD0bIg74onLdc73bTB+ghYzoOM0ZflBrMzLu5v kpJgWgMRHgrxJjbeMMAeLd5IOLqdZsGGy8UhMYDlQFiNVv41Zj AnXAqEjZ8Oh8YjoNP8jnZUX15sWv5bzR1agHdKgTgy2ewzcErN bj3a1GUySmish9GBUpQrFNit8yElCXlv3BAf1Gl/qP4hIzZByi IXxk+WIarjMQXdGJEoolV2MtDSCl4e2QD68L7o74z05Z6qD4Gu +MUXV+mvfVfOpwNM3QsgkN/hJ2SvaatSnhQVteXA==}
URLs

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Signatures

  • Netwalker Ransomware

    Ransomware family with multiple versions. Also known as MailTo.

    ransomwarenetwalker
  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomware
  • Modifies extensions of user files 12 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • Deletes itself 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

    spyware
  • Modifies service 2 TTPs 5 IoCs
    persistence
  • Drops file in Program Files directory 7487 IoCs
  • Interacts with shadow copies 2 TTPs 1 IoCs

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

    ransomware
  • Kills process with taskkill 1 IoCs
    evasion
  • Suspicious behavior: EnumeratesProcesses 10618 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\IRSdeclaration‮cod.exe
    "C:\Users\Admin\AppData\Local\Temp\IRSdeclaration‮cod.exe"
    1⤵
    • Modifies extensions of user files
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1332
    • C:\Windows\system32\vssadmin.exe
      C:\Windows\system32\vssadmin.exe delete shadows /all /quiet
      2⤵
      • Interacts with shadow copies
      PID:1540
    • C:\Windows\SysWOW64\notepad.exe
      C:\Windows\system32\notepad.exe "C:\Users\Admin\Desktop\FD6F5D-Readme.txt"
      2⤵
        PID:6048
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c "C:\Users\Admin\AppData\Local\Temp\DF57.tmp.bat"
        2⤵
        • Deletes itself
        • Suspicious use of WriteProcessMemory
        PID:4152
        • C:\Windows\SysWOW64\taskkill.exe
          taskkill /F /PID 1332
          3⤵
          • Kills process with taskkill
          • Suspicious use of AdjustPrivilegeToken
          PID:4324
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Modifies service
      • Suspicious use of AdjustPrivilegeToken
      PID:452

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\DF57.tmp.bat
      MD5

      b4cdc3fe80e2be5da61eaf31badfec28

      SHA1

      549722144b82a36ef8459b02fbf139101c7e6722

      SHA256

      62b3565461719040a093eee2ee67db8c1b8eab4f12b5c49e46e2319d7ff92708

      SHA512

      5de9259c8b74a108441c66f4ad78610c082d1d867e9a5ca0756f96f248d5a818db8086fe0451751c83ec32c9d7964e5e9339329121a1e77a14a5237ea7b4442c

      Download Submit

    • C:\Users\Admin\Desktop\FD6F5D-Readme.txt
      MD5

      de355bdbab95d82574264b24e411f5c4

      SHA1

      d188760a8ff286b38a64113286332a019ffe4fa9

      SHA256

      07c261db4a4b45aafd9ebaa1972f46b77ecbff066dd91fac2204bb391b5cd10a

      SHA512

      624130d813070340c8e011b2e83cf3f4eb29d62a5167ad0d23bb7a047feb20e3d021aa17cee1fd1c417f3a308c3f62d07e05387b45eeb2678fbab15b5de98867

      Download Submit

    • memory/1540-0-0x0000000000000000-mapping.dmp

      Download

    • memory/4152-2-0x0000000000000000-mapping.dmp

      Download

    • memory/4324-4-0x0000000000000000-mapping.dmp

      Download

    • memory/6048-1-0x0000000000000000-mapping.dmp

      Download