Resubmissions

18-09-2022 19:48

220918-yh3tkaffal 10

18-09-2022 18:14

220918-wveamafebk 10

Analysis

  • max time kernel
    208s
  • max time network
    210s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18-09-2022 19:48

General

  • Target

    V7bTrYJ4lbO6OS.dll

  • Size

    159KB

  • MD5

    7932ee5fa6f83b149569752c47e04b87

  • SHA1

    6eb115feadc5808507fb5a666dd18aa89a45616c

  • SHA256

    f329ea2c754ab196d15c20fbf9abd722fa63630631144c5a409bd2a20172196b

  • SHA512

    17ba26e69f7536f5adaa52454fbd407338be61d97bc396baa591de9fa19aab3e539b4ca32059b2ddb1b901ac7ecd341dff9ead706fc0d058086e6b3795642f58

  • SSDEEP

    3072:pusrpo1j49JvKa0ePbh37E6ZO78buZKxrF:ZQcvKpE37E6nmKhF

Malware Config

Signatures

  • Locky

    Ransomware strain released in 2016, with advanced features like anti-analysis.

  • Locky (Osiris variant)

    Variant of the Locky ransomware seen in the wild since early 2017.

  • Blocklisted process makes network request 5 IoCs
  • Modifies extensions of user files 1 IoCs

    Ransomware generally changes the extension on encrypted files.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 1 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies Control Panel 2 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 4 IoCs
  • Suspicious use of FindShellTrayWindow 3 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\V7bTrYJ4lbO6OS.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1284
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\V7bTrYJ4lbO6OS.dll,#1
      2⤵
      • Blocklisted process makes network request
      • Modifies extensions of user files
      • Sets desktop wallpaper using registry
      • Modifies Control Panel
      • Suspicious use of WriteProcessMemory
      PID:3704
      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --single-argument C:\Users\Admin\DesktopOSIRIS.htm
        3⤵
        • Adds Run key to start application
        • Enumerates system info in registry
        • Modifies registry class
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of WriteProcessMemory
        PID:924
        • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
          "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data" /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data" --annotation=IsOfficialBuild=1 --annotation=channel= --annotation=chromium-version=92.0.4515.131 "--annotation=exe=C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --annotation=plat=Win64 "--annotation=prod=Microsoft Edge" --annotation=ver=92.0.902.67 --initial-client-data=0xf8,0xfc,0x100,0xd4,0x104,0x7ffca10b46f8,0x7ffca10b4708,0x7ffca10b4718
          4⤵
            PID:4196
          • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
            "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=gpu-process --field-trial-handle=1516,12445491856346606693,6504699107234267678,131072 --gpu-preferences=UAAAAAAAAADgAAAQAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHgAAAAAAAAAeAAAAAAAAAAoAAAABAAAACAAAAAAAAAAKAAAAAAAAAAwAAAAAAAAADgAAAAAAAAAEAAAAAAAAAAAAAAADQAAABAAAAAAAAAAAQAAAA0AAAAQAAAAAAAAAAQAAAANAAAAEAAAAAAAAAAHAAAADQAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=2192 /prefetch:2
            4⤵
              PID:4148
            • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
              "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --field-trial-handle=1516,12445491856346606693,6504699107234267678,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=2268 /prefetch:3
              4⤵
              • Suspicious behavior: EnumeratesProcesses
              PID:4488
            • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
              "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --field-trial-handle=1516,12445491856346606693,6504699107234267678,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=2756 /prefetch:8
              4⤵
                PID:3936
              • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1516,12445491856346606693,6504699107234267678,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=6 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3892 /prefetch:1
                4⤵
                  PID:1952
                • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1516,12445491856346606693,6504699107234267678,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=5 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3804 /prefetch:1
                  4⤵
                    PID:3376
                  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --field-trial-handle=1516,12445491856346606693,6504699107234267678,131072 --lang=en-US --service-sandbox-type=service --mojo-platform-channel-handle=5276 /prefetch:8
                    4⤵
                      PID:3256
                    • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                      "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --field-trial-handle=1516,12445491856346606693,6504699107234267678,131072 --lang=en-US --service-sandbox-type=service --mojo-platform-channel-handle=5260 /prefetch:8
                      4⤵
                        PID:364
                      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1516,12445491856346606693,6504699107234267678,131072 --disable-gpu-compositing --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=9 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5436 /prefetch:1
                        4⤵
                          PID:920
                        • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                          "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1516,12445491856346606693,6504699107234267678,131072 --disable-gpu-compositing --lang=en-US --disable-client-side-phishing-detection --instant-process --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=10 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5412 /prefetch:1
                          4⤵
                            PID:3928
                          • C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe
                            "C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe" --type=utility --utility-sub-type=winrt_app_id.mojom.WinrtAppIdService --field-trial-handle=1516,12445491856346606693,6504699107234267678,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5752 /prefetch:8
                            4⤵
                              PID:1996
                            • C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\Installer\setup.exe
                              "C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\Installer\setup.exe" --configure-user-settings --verbose-logging --system-level --msedge --force-configure-user-settings
                              4⤵
                              • Drops file in Program Files directory
                              PID:5036
                              • C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\Installer\setup.exe
                                "C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\Installer\setup.exe" --type=crashpad-handler /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler --database=C:\Windows\TEMP\MsEdgeCrashpad --annotation=IsOfficialBuild=1 --annotation=channel= --annotation=chromium-version=92.0.4515.131 "--annotation=exe=C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\Installer\setup.exe" --annotation=plat=Win64 "--annotation=prod=Microsoft Edge" --annotation=ver=92.0.902.67 --initial-client-data=0x220,0x224,0x228,0x1fc,0x22c,0x7ff7e9755460,0x7ff7e9755470,0x7ff7e9755480
                                5⤵
                                  PID:4924
                              • C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe
                                "C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe" --type=utility --utility-sub-type=winrt_app_id.mojom.WinrtAppIdService --field-trial-handle=1516,12445491856346606693,6504699107234267678,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5752 /prefetch:8
                                4⤵
                                • Suspicious behavior: EnumeratesProcesses
                                PID:4284
                              • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                                "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=unzip.mojom.Unzipper --field-trial-handle=1516,12445491856346606693,6504699107234267678,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=1924 /prefetch:8
                                4⤵
                                  PID:1528
                                • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                                  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=unzip.mojom.Unzipper --field-trial-handle=1516,12445491856346606693,6504699107234267678,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=3892 /prefetch:8
                                  4⤵
                                    PID:644
                                  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                                    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=unzip.mojom.Unzipper --field-trial-handle=1516,12445491856346606693,6504699107234267678,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=1812 /prefetch:8
                                    4⤵
                                      PID:4636
                              • C:\Windows\System32\CompPkgSrv.exe
                                C:\Windows\System32\CompPkgSrv.exe -Embedding
                                1⤵
                                  PID:4092

                                Network

                                MITRE ATT&CK Matrix ATT&CK v6

                                Persistence

                                Registry Run Keys / Startup Folder

                                1
                                T1060

                                Defense Evasion

                                Modify Registry

                                2
                                T1112

                                Discovery

                                System Information Discovery

                                2
                                T1082

                                Query Registry

                                1
                                T1012

                                Impact

                                Defacement

                                1
                                T1491

                                Replay Monitor

                                Loading Replay Monitor...

                                Downloads

                                • C:\Users\Admin\DesktopOSIRIS.htm
                                  Filesize

                                  8KB

                                  MD5

                                  627599eb10c77d2e3d80f38452d3ef98

                                  SHA1

                                  fbcfe39d25c57da6eb36ec66bfd2408e8e35b6d9

                                  SHA256

                                  4f264db2a0a4ffd267aaf603c853a4211c2d7befdf14ff9a75e53b0f78e35266

                                  SHA512

                                  4f2c89f9d312aba49558604544a6818a83a3b3abc8e5733806e27eb427a26eb186eefbd9e1cfad4402b4def20010da540264cf9a128121cd99f546b63b58a99f

                                • \??\pipe\LOCAL\crashpad_924_EAQXXBMXJKVYYNMQ
                                  MD5

                                  d41d8cd98f00b204e9800998ecf8427e

                                  SHA1

                                  da39a3ee5e6b4b0d3255bfef95601890afd80709

                                  SHA256

                                  e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

                                  SHA512

                                  cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

                                • memory/364-153-0x0000000000000000-mapping.dmp
                                • memory/644-164-0x0000000000000000-mapping.dmp
                                • memory/920-155-0x0000000000000000-mapping.dmp
                                • memory/924-137-0x0000000000000000-mapping.dmp
                                • memory/1528-162-0x0000000000000000-mapping.dmp
                                • memory/1952-146-0x0000000000000000-mapping.dmp
                                • memory/3256-151-0x0000000000000000-mapping.dmp
                                • memory/3376-148-0x0000000000000000-mapping.dmp
                                • memory/3704-135-0x0000000075770000-0x00000000757A2000-memory.dmp
                                  Filesize

                                  200KB

                                • memory/3704-132-0x0000000000000000-mapping.dmp
                                • memory/3704-133-0x0000000075770000-0x00000000757A2000-memory.dmp
                                  Filesize

                                  200KB

                                • memory/3704-136-0x0000000075770000-0x00000000757A2000-memory.dmp
                                  Filesize

                                  200KB

                                • memory/3928-157-0x0000000000000000-mapping.dmp
                                • memory/3936-144-0x0000000000000000-mapping.dmp
                                • memory/4148-140-0x0000000000000000-mapping.dmp
                                • memory/4196-138-0x0000000000000000-mapping.dmp
                                • memory/4284-160-0x0000000000000000-mapping.dmp
                                • memory/4488-141-0x0000000000000000-mapping.dmp
                                • memory/4636-166-0x0000000000000000-mapping.dmp
                                • memory/4924-159-0x0000000000000000-mapping.dmp
                                • memory/5036-158-0x0000000000000000-mapping.dmp