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Resubmissions

31/05/2024, 16:58

240531-vgt89aef31 8

31/05/2024, 16:54

240531-veg6xaee61 8

Analysis

  • max time kernel
    146s
  • max time network
    150s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240508-en
  • resource tags

    arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    31/05/2024, 16:54

General

  • Target

    https://cdn.discordapp.com/attachments/1022877139856535783/1246144433896820786/MesterMC.exe?ex=665b51f1&is=665a0071&hm=a5550b2faa1b769bee849a4ffdcca64405e9461686129584b147667a050d9247&

Score
8/10

Malware Config

Signatures

  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Modifies file permissions 1 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • NTFS ADS 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 7 IoCs
  • Suspicious use of FindShellTrayWindow 36 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/1022877139856535783/1246144433896820786/MesterMC.exe?ex=665b51f1&is=665a0071&hm=a5550b2faa1b769bee849a4ffdcca64405e9461686129584b147667a050d9247&
    1⤵
    • Enumerates system info in registry
    • NTFS ADS
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:2428
    • 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,0x7ffcca413cb8,0x7ffcca413cc8,0x7ffcca413cd8
      2⤵
        PID:3896
      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=gpu-process --field-trial-handle=1924,12622316731359871858,6997413236647360651,131072 --gpu-preferences=SAAAAAAAAADgAAAwAAAAAAAAAAAAAAAAAABgAAAAAAAoAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAB4AAAAAAAAAHgAAAAAAAAAKAAAAAQAAAAgAAAAAAAAACgAAAAAAAAAMAAAAAAAAAA4AAAAAAAAABAAAAAAAAAAAAAAAAUAAAAQAAAAAAAAAAAAAAAGAAAAEAAAAAAAAAABAAAABQAAABAAAAAAAAAAAQAAAAYAAAAIAAAAAAAAAAgAAAAAAAAA --mojo-platform-channel-handle=1936 /prefetch:2
        2⤵
          PID:4888
        • 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=1924,12622316731359871858,6997413236647360651,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=2408 /prefetch:3
          2⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:1508
        • 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=1924,12622316731359871858,6997413236647360651,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=2668 /prefetch:8
          2⤵
            PID:3428
          • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
            "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1924,12622316731359871858,6997413236647360651,131072 --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=3300 /prefetch:1
            2⤵
              PID:3964
            • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
              "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1924,12622316731359871858,6997413236647360651,131072 --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=3336 /prefetch:1
              2⤵
                PID:1440
              • 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=1924,12622316731359871858,6997413236647360651,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5364 /prefetch:8
                2⤵
                • Suspicious behavior: EnumeratesProcesses
                PID:1232
              • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1924,12622316731359871858,6997413236647360651,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=9 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3032 /prefetch:1
                2⤵
                  PID:2420
                • 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.UtilReadIcon --field-trial-handle=1924,12622316731359871858,6997413236647360651,131072 --lang=en-US --service-sandbox-type=icon_reader --mojo-platform-channel-handle=5804 /prefetch:8
                  2⤵
                    PID:1744
                  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1924,12622316731359871858,6997413236647360651,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=11 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5568 /prefetch:1
                    2⤵
                      PID:3644
                    • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                      "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1924,12622316731359871858,6997413236647360651,131072 --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=12 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5580 /prefetch:1
                      2⤵
                        PID:3040
                      • 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=1924,12622316731359871858,6997413236647360651,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5656 /prefetch:8
                        2⤵
                        • Suspicious behavior: EnumeratesProcesses
                        PID:2176
                      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1924,12622316731359871858,6997413236647360651,131072 --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=6140 /prefetch:1
                        2⤵
                          PID:3988
                        • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                          "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1924,12622316731359871858,6997413236647360651,131072 --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=5380 /prefetch:1
                          2⤵
                            PID:1700
                          • 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=1924,12622316731359871858,6997413236647360651,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=2504 /prefetch:8
                            2⤵
                            • NTFS ADS
                            • Suspicious behavior: EnumeratesProcesses
                            PID:2124
                          • C:\Users\Admin\Downloads\MesterMC.exe
                            "C:\Users\Admin\Downloads\MesterMC.exe"
                            2⤵
                            • Executes dropped EXE
                            PID:3316
                            • C:\Windows\SysWOW64\cmd.exe
                              C:\Windows\system32\cmd.exe /c java -version 2>java-version.txt
                              3⤵
                                PID:2420
                                • C:\Program Files (x86)\Common Files\Oracle\Java\javapath\java.exe
                                  java -version
                                  4⤵
                                    PID:5012
                                    • C:\Windows\system32\icacls.exe
                                      C:\Windows\system32\icacls.exe C:\ProgramData\Oracle\Java\.oracle_jre_usage /grant "everyone":(OI)(CI)M
                                      5⤵
                                      • Modifies file permissions
                                      PID:3908
                            • C:\Windows\System32\CompPkgSrv.exe
                              C:\Windows\System32\CompPkgSrv.exe -Embedding
                              1⤵
                                PID:3060
                              • C:\Windows\System32\CompPkgSrv.exe
                                C:\Windows\System32\CompPkgSrv.exe -Embedding
                                1⤵
                                  PID:3152

                                Network

                                MITRE ATT&CK Enterprise v15

                                Replay Monitor

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                                Downloads

                                • C:\ProgramData\Oracle\Java\.oracle_jre_usage\3903daac9bc4a3b7.timestamp

                                  Filesize

                                  46B

                                  MD5

                                  1c7e0f55e2974220cb16a102eb91687e

                                  SHA1

                                  3a4c5a916b67d95fa4be29d2d49edfa10d91b4c3

                                  SHA256

                                  6bb1814fa8b414a7b00d975a86962826425f49ce4fcd38065ab1633900576614

                                  SHA512

                                  daadb16a59c42a5693841499c71ff46e03a4ae50cfee10fa7240794eca3a3d3fd9a4e248d47a7d7e8c48a91a9f4acd35054dd2089502dd8690b55918b59c5a54

                                • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\1a149e5c-569d-43de-9ac0-6c49ae6f2e01.tmp

                                  Filesize

                                  11KB

                                  MD5

                                  88faafbc14f1a369539e8bbbcb537b2c

                                  SHA1

                                  f774a5dee1c81345c9daf673acc543c2798cad70

                                  SHA256

                                  2516ee7461b256c42043bcec74c675993f888593efab3da90fc74e4c90d3bc27

                                  SHA512

                                  e52c5444c35dc1428c8fa1439cd01c0a832d4c9b85be45d9ecec32098255deeed9d6e3759c8069897c8cf0da1f6dcc59fd77f10599b8bd1b853f6789b7bbd468

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

                                  Filesize

                                  152B

                                  MD5

                                  d56e8f308a28ac4183257a7950ab5c89

                                  SHA1

                                  044969c58cef041a073c2d132fa66ccc1ee553fe

                                  SHA256

                                  0bc24451c65457abc1e4e340be2f8faceae6b6ec7768a21d44bcd14636543bae

                                  SHA512

                                  fd5798559f4025ec3408f5550b8671d394b1ec83b85fdac8c005b0cc3e183272bdd07db15a156a572c9c5e5798badf235dc10aae62a052efa8dd9dfdbdca8189

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

                                  Filesize

                                  152B

                                  MD5

                                  8f2eb94e31cadfb6eb07e6bbe61ef7ae

                                  SHA1

                                  3f42b0d5a90408689e7f7941f8db72a67d5a2eab

                                  SHA256

                                  d222c8e3b19cda2657629a486faf32962e016fc66561ce0d17010afdb283c9de

                                  SHA512

                                  9f7f84149885b851e0bf7173c540e466a2b2eb9907d8b608f60360933328cc75d9d1b63640ea4ecc1e64ecc5dd7ee74d82903f96a8b4418ca56296641a8c0703

                                • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Network Persistent State

                                  Filesize

                                  186B

                                  MD5

                                  094ab275342c45551894b7940ae9ad0d

                                  SHA1

                                  2e7ce26fe2eb9be641ae929d0c9cc0dfa26c018e

                                  SHA256

                                  ef1739b833a1048ee1bd55dcbac5b1397396faca1ad771f4d6c2fe58899495a3

                                  SHA512

                                  19d0c688dc1121569247111e45de732b2ab86c71aecdde34b157cfd1b25c53473ed3ade49a97f8cb2ddc4711be78fa26c9330887094e031e9a71bb5c29080b0d

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

                                  Filesize

                                  5KB

                                  MD5

                                  37510534546efcc7fe6e6cb178155946

                                  SHA1

                                  eedf21872436f20db8bef05012d2ffc02754667f

                                  SHA256

                                  e34fd936279e5a37c99ff6ddb28f37b060f89ff48e2bde7754352548aa675b09

                                  SHA512

                                  7cbc4ef8f4f63c7c070f222788019076a8525c9f4d5e4c4bf1720514d3fddd8525d3a6abf7a7aa4ddc90a72ffccfde87f92de1cfdb4a1e054163f3bb206fa9f2

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

                                  Filesize

                                  5KB

                                  MD5

                                  64e08f084ecbc923bc0ec001abef3828

                                  SHA1

                                  650caf6d738222c9609ebc2b2007321175e6814e

                                  SHA256

                                  8e1f6f0bc34cc672e638143e6181f6e568d75b28e4db788298a5688ecf8fbced

                                  SHA512

                                  c18a15a4354c26cf43a0bc9c6254807cb7e2511c16c9dde99638323c3f985d8452ceaaf11dd9a853d7561041a193694734d113c71db3a3e3575dbbb669c65be5

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

                                  Filesize

                                  5KB

                                  MD5

                                  862acf4a922021ae0f81226e6dfebd5b

                                  SHA1

                                  225a92e068434c698112939d9a156d2d32d9974a

                                  SHA256

                                  4c292067494eb97c51dbf2a402aa1f9082c77b07c4309bcab7a5426972aa17c3

                                  SHA512

                                  c6ea4e56946bf3c3d6a147b654b6034d977be133646197c6a1c159ae8e52f4a61b8ce4457ff1e68c2100f08242fe46a03941dba113622d3f9e3826796d39a799

                                • 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\Local State

                                  Filesize

                                  11KB

                                  MD5

                                  edfdf5c855fd7c3549cfb06e08c0c1e9

                                  SHA1

                                  91711d5a53343d91d51da0ad7c2a2095b973ab15

                                  SHA256

                                  785f23b9193482f59ed114085e7e0494defdea75a64c51e67903a4255bf0784b

                                  SHA512

                                  852e6876baf176f1bd7c8a014cdb05f0af4d1b66642cb535e6b800b3acdc08ad3b202233cae9d01654a5a6ade14b15c868db94877a0b3dc38bf87e313c0a6cd9

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

                                  Filesize

                                  11KB

                                  MD5

                                  c8d0c325bc0acc94dc2bc56b7196c217

                                  SHA1

                                  93414d1954b14d36d1aa9358b34f3282f60a7323

                                  SHA256

                                  93a037e1d9195c5c949b97282a381c75a0f2491df5969cf1b667df9bb417405e

                                  SHA512

                                  7cba7f92881f6800f5e2ab1959d51c7e4ff3f507f9bd17a1c22b0931064d8f5a4793a0de7a763b92b0284e596ec59ec877bdb28229db34e2c771ebae4969c5c5

                                • C:\Users\Admin\Downloads\MesterMC.exe:Zone.Identifier

                                  Filesize

                                  26B

                                  MD5

                                  fbccf14d504b7b2dbcb5a5bda75bd93b

                                  SHA1

                                  d59fc84cdd5217c6cf74785703655f78da6b582b

                                  SHA256

                                  eacd09517ce90d34ba562171d15ac40d302f0e691b439f91be1b6406e25f5913

                                  SHA512

                                  aa1d2b1ea3c9de3ccadb319d4e3e3276a2f27dd1a5244fe72de2b6f94083dddc762480482c5c2e53f803cd9e3973ddefc68966f974e124307b5043e654443b98

                                • C:\Users\Admin\Downloads\Unconfirmed 619534.crdownload

                                  Filesize

                                  622KB

                                  MD5

                                  ae87665288c23826dc42936c88b5c601

                                  SHA1

                                  3d1852603a86f3846cb056bd5ff908dbc1b68d09

                                  SHA256

                                  212f5b38d07976823d2ba1ce3acdb85c1bf2d46361e352af56c05f333d5c8694

                                  SHA512

                                  5e9868a7241264d6bf290a58e71ba360353c7adebfbfee597632928bc683555e0f90e29ae4c4927348f551401fc6047518e9240ca2fd6402cc427febf80d4d6f

                                • C:\Users\Admin\Downloads\java-version.txt

                                  Filesize

                                  147B

                                  MD5

                                  faf2f8b188047379978915849af13d28

                                  SHA1

                                  42ecb6f269f3dc3183d3b72b4216010f106d3317

                                  SHA256

                                  4ebfda517657bcc9f2b2e3c3cd13e58e9adef320c0ca1a8ac9aee888d4e1ef8e

                                  SHA512

                                  85c3afedfda0aa63edab3b1c5ed7ef8b06e392d387ea3c16bd28c66a54f72c7cbdd14b8af9428168402313f8a4d203be7e5f8a6732d0d8d52d46fe3963ebde79

                                • memory/3316-140-0x0000000000400000-0x00000000004A7000-memory.dmp

                                  Filesize

                                  668KB

                                • memory/3316-141-0x0000000000400000-0x00000000004A7000-memory.dmp

                                  Filesize

                                  668KB

                                • memory/5012-127-0x00000275CE5A0000-0x00000275CE5A1000-memory.dmp

                                  Filesize

                                  4KB