Analysis

  • max time kernel
    33s
  • max time network
    14s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240802-en
  • resource tags

    arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    23-08-2024 19:52

General

  • Target

    https://cdn.discordapp.com/attachments/1276583536090021969/1276597304639492237/krampusm.zip?ex=66ca1b63&is=66c8c9e3&hm=b65397aed5b2b5cfd77672c82fc452c8f0cbb66e62d78edb1a95c97e69b4b247&

Score
3/10

Malware Config

Signatures

  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies registry class 1 IoCs
  • NTFS ADS 1 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 7 IoCs
  • Suspicious use of FindShellTrayWindow 33 IoCs
  • Suspicious use of SendNotifyMessage 12 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --single-argument https://cdn.discordapp.com/attachments/1276583536090021969/1276597304639492237/krampusm.zip?ex=66ca1b63&is=66c8c9e3&hm=b65397aed5b2b5cfd77672c82fc452c8f0cbb66e62d78edb1a95c97e69b4b247&
    1⤵
    • Enumerates system info in registry
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:1320
    • 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=90.0.4430.212 "--annotation=exe=C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --annotation=plat=Win64 "--annotation=prod=Microsoft Edge" --annotation=ver=90.0.818.66 --initial-client-data=0x100,0x104,0x108,0xdc,0x10c,0x7ff956e73cb8,0x7ff956e73cc8,0x7ff956e73cd8
      2⤵
        PID:1764
      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=gpu-process --field-trial-handle=1916,16560615450361834280,13788151258527175151,131072 --gpu-preferences=SAAAAAAAAADgAAAwAAAAAAAAAAAAAAAAAABgAAAAAAAoAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAB4AAAAAAAAAHgAAAAAAAAAKAAAAAQAAAAgAAAAAAAAACgAAAAAAAAAMAAAAAAAAAA4AAAAAAAAABAAAAAAAAAAAAAAAAUAAAAQAAAAAAAAAAAAAAAGAAAAEAAAAAAAAAABAAAABQAAABAAAAAAAAAAAQAAAAYAAAAIAAAAAAAAAAgAAAAAAAAA --mojo-platform-channel-handle=1928 /prefetch:2
        2⤵
          PID:916
        • 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=1916,16560615450361834280,13788151258527175151,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=2344 /prefetch:3
          2⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:3644
        • 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=1916,16560615450361834280,13788151258527175151,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=2648 /prefetch:8
          2⤵
            PID:4348
          • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
            "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1916,16560615450361834280,13788151258527175151,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3252 /prefetch:1
            2⤵
              PID:2008
            • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
              "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1916,16560615450361834280,13788151258527175151,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3260 /prefetch:1
              2⤵
                PID:2660
              • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1916,16560615450361834280,13788151258527175151,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=8 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=4964 /prefetch:1
                2⤵
                  PID:3076
                • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=quarantine.mojom.Quarantine --field-trial-handle=1916,16560615450361834280,13788151258527175151,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=4940 /prefetch:8
                  2⤵
                  • NTFS ADS
                  • Suspicious behavior: EnumeratesProcesses
                  PID:1400
                • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --field-trial-handle=1916,16560615450361834280,13788151258527175151,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5364 /prefetch:8
                  2⤵
                  • Suspicious behavior: EnumeratesProcesses
                  PID:2536
                • C:\Program Files (x86)\Microsoft\Edge\Application\90.0.818.66\identity_helper.exe
                  "C:\Program Files (x86)\Microsoft\Edge\Application\90.0.818.66\identity_helper.exe" --type=utility --utility-sub-type=winrt_app_id.mojom.WinrtAppIdService --field-trial-handle=1916,16560615450361834280,13788151258527175151,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=6108 /prefetch:8
                  2⤵
                  • Suspicious behavior: EnumeratesProcesses
                  PID:3456
                • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1916,16560615450361834280,13788151258527175151,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=12 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5816 /prefetch:1
                  2⤵
                    PID:5064
                  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1916,16560615450361834280,13788151258527175151,131072 --lang=en-US --disable-client-side-phishing-detection --instant-process --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=13 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5664 /prefetch:1
                    2⤵
                      PID:2420
                    • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                      "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1916,16560615450361834280,13788151258527175151,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=14 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5096 /prefetch:1
                      2⤵
                        PID:4784
                      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1916,16560615450361834280,13788151258527175151,131072 --lang=en-US --disable-client-side-phishing-detection --instant-process --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=15 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=4916 /prefetch:1
                        2⤵
                          PID:2072
                      • C:\Windows\System32\CompPkgSrv.exe
                        C:\Windows\System32\CompPkgSrv.exe -Embedding
                        1⤵
                          PID:1728
                        • C:\Windows\System32\CompPkgSrv.exe
                          C:\Windows\System32\CompPkgSrv.exe -Embedding
                          1⤵
                            PID:4656
                          • C:\Windows\System32\rundll32.exe
                            C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
                            1⤵
                              PID:5076
                            • C:\Users\Admin\Downloads\krampusm\SG9uZXlwb3Q.exe
                              "C:\Users\Admin\Downloads\krampusm\SG9uZXlwb3Q.exe"
                              1⤵
                              • Suspicious behavior: EnumeratesProcesses
                              PID:1084
                            • C:\Windows\system32\NOTEPAD.EXE
                              "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Downloads\krampusm\howtouse.txt
                              1⤵
                              • Opens file in notepad (likely ransom note)
                              PID:4912

                            Network

                            MITRE ATT&CK Enterprise v15

                            Replay Monitor

                            Loading Replay Monitor...

                            Downloads

                            • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad\settings.dat

                              Filesize

                              152B

                              MD5

                              b4ae6009e2df12ce252d03722e8f4288

                              SHA1

                              44de96f65d69cbae416767040f887f68f8035928

                              SHA256

                              7778069a1493fdb62e6326ba673f03d9a8f46bc0eea949aabbbbc00dcdaddf9d

                              SHA512

                              bb810721e52c77793993470692bb2aab0466f13ed4576e4f4cfa6bc5fcfc59c13552299feb6dfd9642ea07b19a5513d90d0698d09ca1d15e0598133929c05fe1

                            • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad\settings.dat

                              Filesize

                              152B

                              MD5

                              4bf4b59c3deb1688a480f8e56aab059d

                              SHA1

                              612c83e7027b3bfb0e9d2c9efad43c5318e731bb

                              SHA256

                              867ab488aa793057395e9c10f237603cfb180689298871cdf0511132f9628c82

                              SHA512

                              2ec6c89f9653f810e9f80f532abaff2a3c0276f6d299dce1b1eadf6a59e8072ed601a4f9835db25d4d2610482a00dd5a0852d0ef828678f5c5ed33fe64dddca9

                            • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Preferences

                              Filesize

                              5KB

                              MD5

                              f8de2ebe6529a5ec62149a3d56c242a5

                              SHA1

                              0919307b2e5ddafd0a7a92b54085c6801982210a

                              SHA256

                              5e18bfb37b94add2334c83eadadd0fc0e573a78f9d4f8163daafdd99fac6f283

                              SHA512

                              9bd322ba4b9f546c93654571fcc682769a1997fe815b25673caccb84b8d28c7a3c7901242af788ac4fb1a0209eb2625d74a0d3ec1fdc22502b9e33acf42fbf60

                            • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Preferences

                              Filesize

                              5KB

                              MD5

                              f894d892fa78fb383b89c1a154fcadfb

                              SHA1

                              445ca33d88321b170911df2c01d8a28d2648388f

                              SHA256

                              4637f9cc50736acf3ec54bc2fdee6e16dfe2af7891b1cce7104575973376478a

                              SHA512

                              be95447f02bd3820c1470af4215b11c73e5cc9937bd579acd151e0b6235f19d2bd7a1e2f05cad2e23e9f2dd57204593c516feac83930f01fba357f177ecd765b

                            • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\data_reduction_proxy_leveldb\CURRENT

                              Filesize

                              16B

                              MD5

                              46295cac801e5d4857d09837238a6394

                              SHA1

                              44e0fa1b517dbf802b18faf0785eeea6ac51594b

                              SHA256

                              0f1bad70c7bd1e0a69562853ec529355462fcd0423263a3d39d6d0d70b780443

                              SHA512

                              8969402593f927350e2ceb4b5bc2a277f3754697c1961e3d6237da322257fbab42909e1a742e22223447f3a4805f8d8ef525432a7c3515a549e984d3eff72b23

                            • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\data_reduction_proxy_leveldb\CURRENT

                              Filesize

                              16B

                              MD5

                              206702161f94c5cd39fadd03f4014d98

                              SHA1

                              bd8bfc144fb5326d21bd1531523d9fb50e1b600a

                              SHA256

                              1005a525006f148c86efcbfb36c6eac091b311532448010f70f7de9a68007167

                              SHA512

                              0af09f26941b11991c750d1a2b525c39a8970900e98cba96fd1b55dbf93fee79e18b8aab258f48b4f7bda40d059629bc7770d84371235cdb1352a4f17f80e145

                            • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\d5d3d158-9801-4939-a497-c7e55145be61.tmp

                              Filesize

                              11KB

                              MD5

                              cd2df96f337335bd9a841cdaa2eec477

                              SHA1

                              bf439ed5c8a6e09878b658e60eaa053c1d616683

                              SHA256

                              96222f1a9499414d98c553d2a23ec3bac6dd397256dcfe5164bb507c524b669f

                              SHA512

                              673ace66c85b6189054e817fd7df943b83bb3af133d2da85b4932b16c8015b8e1b2c24a607a140dd53af393a5533343bf3e56dde6625a5e8b6b76524fce3ab97

                            • C:\Users\Admin\Downloads\krampusm.zip

                              Filesize

                              902KB

                              MD5

                              9aa477c475edd4fded246e417ac47ad3

                              SHA1

                              f6ec8562d4fe673de9fb024b167eccad98f04a6d

                              SHA256

                              9bf30e0114d702ed674a6487f55ee14ca4f036c452b0d8049c054b913598c73d

                              SHA512

                              ad505664d03a0810751bf6317e88b6672463d1c22c634e67d99aa30f6ac35945a23f37b23ba71e24d916fc0bb7959d2a902027e19201db9350a506a3f59df002

                            • C:\Users\Admin\Downloads\krampusm.zip:Zone.Identifier

                              Filesize

                              220B

                              MD5

                              5c2078ebe69300c3415799aee9893fcb

                              SHA1

                              4bc2ed99b8e6db4bdc16a9be1d4c9de70f8b3435

                              SHA256

                              31db7f17178498614129bc04b8cb78bbea3137b1e9a688938965e6547d0ac9c2

                              SHA512

                              68b127343fb50417698753367ee57dd8075643f6f770bb44d3f71ed8b7b880b64940620c535713231d94acfae7e7e154530e8a7458937bcc90c0ef3a095f727d