Analysis

  • max time kernel
    86s
  • max time network
    90s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230915-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/09/2023, 08:33

General

  • Target

    d3dd6f0943aa13f6689f5dbc0b0bc7ae67ee0821edf22a0834296058f6b812a9.exe

  • Size

    25KB

  • MD5

    25d1b2a1165f06a99d6dc824310f959c

  • SHA1

    fb01e16d8afd550aae25994f30342ce495069955

  • SHA256

    d3dd6f0943aa13f6689f5dbc0b0bc7ae67ee0821edf22a0834296058f6b812a9

  • SHA512

    69dd7ae6b3e5b41f17044c617bd65821f16e50f01ad12c163d6a948c81521dec61d79dfd55d0289eeaa5736344fa6193422ed47c1e1c506c2a67d84e22c725af

  • SSDEEP

    384:u0JORJN7LK87gh71pYS2aNLQyOVs91wZzLH0b51W7:uJ88qD2it9aNLUbr6

Malware Config

Extracted

Path

C:\Users\Admin\read_it.txt

Family

chaos

Ransom Note
----> Chaos is multi language ransomware. Translate your note to any language <---- All of your files have been encrypted Your computer was infected with a ransomware virus. Your files have been encrypted and you won't be able to decrypt them without our help.What can I do to get my files back?You can buy our special decryption software, this software will allow you to recover all of your data and remove the ransomware from your computer.The price for the software is $1,500. Payment can be made in Bitcoin only. How do I pay, where do I get Bitcoin? Purchasing Bitcoin varies from country to country, you are best advised to do a quick google search yourself to find out how to buy Bitcoin. Many of our customers have reported these sites to be fast and reliable: Coinmama - hxxps://www.coinmama.com Bitpanda - hxxps://www.bitpanda.com Payment informationAmount: 0.1473766 BTC Bitcoin Address: bc1qlnzcep4l4ac0ttdrq7awxev9ehu465f2vpt9x0

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 4 IoCs
  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
  • Deletes backup catalog 3 TTPs 1 IoCs

    Uses wbadmin.exe to inhibit system recovery.

  • Disables Task Manager via registry modification
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Drops startup file 4 IoCs
  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Drops desktop.ini file(s) 64 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks SCSI registry key(s) 3 TTPs 4 IoCs

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

  • Interacts with shadow copies 2 TTPs 1 IoCs

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

  • Modifies registry class 1 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 47 IoCs
  • Suspicious use of AdjustPrivilegeToken 50 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

  • Uses Volume Shadow Copy service COM API

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\d3dd6f0943aa13f6689f5dbc0b0bc7ae67ee0821edf22a0834296058f6b812a9.exe
    "C:\Users\Admin\AppData\Local\Temp\d3dd6f0943aa13f6689f5dbc0b0bc7ae67ee0821edf22a0834296058f6b812a9.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4940
    • C:\Users\Admin\AppData\Roaming\svchost.exe
      "C:\Users\Admin\AppData\Roaming\svchost.exe"
      2⤵
      • Checks computer location settings
      • Drops startup file
      • Executes dropped EXE
      • Adds Run key to start application
      • Drops desktop.ini file(s)
      • Modifies registry class
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4360
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3560
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:3328
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:4516
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1800
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:5072
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1696
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:644
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:1112
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read_it.txt
        3⤵
        • Opens file in notepad (likely ransom note)
        PID:3308
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:4324
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1440
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:4644
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:4476

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\d3dd6f0943aa13f6689f5dbc0b0bc7ae67ee0821edf22a0834296058f6b812a9.exe.log

            Filesize

            226B

            MD5

            28d7fcc2b910da5e67ebb99451a5f598

            SHA1

            a5bf77a53eda1208f4f37d09d82da0b9915a6747

            SHA256

            2391511d0a66ed9f84ae54254f51c09e43be01ad685db80da3201ec880abd49c

            SHA512

            2d8eb65cbf04ca506f4ef3b9ae13ccf05ebefab702269ba70ffd1ce9e6c615db0a3ee3ac0e81a06f546fc3250b7b76155dd51241c41b507a441b658c8e761df6

          • C:\Users\Admin\AppData\Roaming\read_it.txt

            Filesize

            964B

            MD5

            4217b8b83ce3c3f70029a056546f8fd0

            SHA1

            487cdb5733d073a0427418888e8f7070fe782a03

            SHA256

            7d767e907be373c680d1f7884d779588eb643bebb3f27bf3b5ed4864aa4d8121

            SHA512

            2a58c99fa52f99c276e27eb98aef2ce1205f16d1e37b7e87eb69e9ecda22b578195a43f1a7f70fead6ba70421abf2f85c917551c191536eaf1f3011d3d24f740

          • C:\Users\Admin\AppData\Roaming\svchost.exe

            Filesize

            25KB

            MD5

            25d1b2a1165f06a99d6dc824310f959c

            SHA1

            fb01e16d8afd550aae25994f30342ce495069955

            SHA256

            d3dd6f0943aa13f6689f5dbc0b0bc7ae67ee0821edf22a0834296058f6b812a9

            SHA512

            69dd7ae6b3e5b41f17044c617bd65821f16e50f01ad12c163d6a948c81521dec61d79dfd55d0289eeaa5736344fa6193422ed47c1e1c506c2a67d84e22c725af

          • C:\Users\Admin\AppData\Roaming\svchost.exe

            Filesize

            25KB

            MD5

            25d1b2a1165f06a99d6dc824310f959c

            SHA1

            fb01e16d8afd550aae25994f30342ce495069955

            SHA256

            d3dd6f0943aa13f6689f5dbc0b0bc7ae67ee0821edf22a0834296058f6b812a9

            SHA512

            69dd7ae6b3e5b41f17044c617bd65821f16e50f01ad12c163d6a948c81521dec61d79dfd55d0289eeaa5736344fa6193422ed47c1e1c506c2a67d84e22c725af

          • C:\Users\Admin\AppData\Roaming\svchost.exe

            Filesize

            25KB

            MD5

            25d1b2a1165f06a99d6dc824310f959c

            SHA1

            fb01e16d8afd550aae25994f30342ce495069955

            SHA256

            d3dd6f0943aa13f6689f5dbc0b0bc7ae67ee0821edf22a0834296058f6b812a9

            SHA512

            69dd7ae6b3e5b41f17044c617bd65821f16e50f01ad12c163d6a948c81521dec61d79dfd55d0289eeaa5736344fa6193422ed47c1e1c506c2a67d84e22c725af

          • C:\Users\Admin\ntuser.ini

            Filesize

            1B

            MD5

            d1457b72c3fb323a2671125aef3eab5d

            SHA1

            5bab61eb53176449e25c2c82f172b82cb13ffb9d

            SHA256

            8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

            SHA512

            ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

          • C:\Users\Admin\read_it.txt

            Filesize

            964B

            MD5

            4217b8b83ce3c3f70029a056546f8fd0

            SHA1

            487cdb5733d073a0427418888e8f7070fe782a03

            SHA256

            7d767e907be373c680d1f7884d779588eb643bebb3f27bf3b5ed4864aa4d8121

            SHA512

            2a58c99fa52f99c276e27eb98aef2ce1205f16d1e37b7e87eb69e9ecda22b578195a43f1a7f70fead6ba70421abf2f85c917551c191536eaf1f3011d3d24f740

          • memory/4360-15-0x00007FF8BFC20000-0x00007FF8C06E1000-memory.dmp

            Filesize

            10.8MB

          • memory/4360-854-0x00007FF8BFC20000-0x00007FF8C06E1000-memory.dmp

            Filesize

            10.8MB

          • memory/4940-0-0x00000000004E0000-0x00000000004EC000-memory.dmp

            Filesize

            48KB

          • memory/4940-1-0x00007FF8BFC20000-0x00007FF8C06E1000-memory.dmp

            Filesize

            10.8MB

          • memory/4940-14-0x00007FF8BFC20000-0x00007FF8C06E1000-memory.dmp

            Filesize

            10.8MB