Analysis

  • max time kernel
    915s
  • max time network
    1172s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240221-en
  • resource tags

    arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    04/04/2024, 16:28

General

  • Target
    Nezur.exe
  • Size 2.2MB
  • Sample240404-ty4ctacd6x
  • SHA256 6d49421c010e7b3bd7a0d1fa1585f3edc97a74ab675eb054d40e280a625fb385
  • MD5 SHA1 SHA512 SSDEEP
Score
8/10

Malware Config

Signatures

  • Sets service image path in registry 2 TTPs 1 IoCs
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies data under HKEY_USERS 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: LoadsDriver 1 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 27 IoCs
  • Suspicious use of SendNotifyMessage 12 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Nezur.exe
    "C:\Users\Admin\AppData\Local\Temp\Nezur.exe"
    1⤵
    • Sets service image path in registry
    • Suspicious behavior: LoadsDriver
    • Suspicious use of AdjustPrivilegeToken
    PID:3220
  • C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe"
    1⤵
    • Enumerates system info in registry
    • Modifies data under HKEY_USERS
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:3120
    • C:\Program Files\Google\Chrome\Application\chrome.exe
      "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" --url=https://clients2.google.com/cr/report --annotation=channel= --annotation=plat=Win64 --annotation=prod=Chrome --annotation=ver=106.0.5249.119 --initial-client-data=0x100,0x104,0x108,0xdc,0x10c,0x7ffb27fb9758,0x7ffb27fb9768,0x7ffb27fb9778
      2⤵
        PID:2108
      • C:\Program Files\Google\Chrome\Application\chrome.exe
        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --gpu-preferences=UAAAAAAAAADgAAAYAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAEgAAAAAAAAASAAAAAAAAAAYAAAAAgAAABAAAAAAAAAAGAAAAAAAAAAQAAAAAAAAAAAAAAAOAAAAEAAAAAAAAAABAAAADgAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=1576 --field-trial-handle=1828,i,17668373987921974059,17978533433565581739,131072 /prefetch:2
        2⤵
          PID:2500
        • C:\Program Files\Google\Chrome\Application\chrome.exe
          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=2120 --field-trial-handle=1828,i,17668373987921974059,17978533433565581739,131072 /prefetch:8
          2⤵
            PID:2404
          • C:\Program Files\Google\Chrome\Application\chrome.exe
            "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=2192 --field-trial-handle=1828,i,17668373987921974059,17978533433565581739,131072 /prefetch:8
            2⤵
              PID:704
            • C:\Program Files\Google\Chrome\Application\chrome.exe
              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --first-renderer-process --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --mojo-platform-channel-handle=3184 --field-trial-handle=1828,i,17668373987921974059,17978533433565581739,131072 /prefetch:1
              2⤵
                PID:2136
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --mojo-platform-channel-handle=3188 --field-trial-handle=1828,i,17668373987921974059,17978533433565581739,131072 /prefetch:1
                2⤵
                  PID:2000
                • C:\Program Files\Google\Chrome\Application\chrome.exe
                  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=7 --mojo-platform-channel-handle=4516 --field-trial-handle=1828,i,17668373987921974059,17978533433565581739,131072 /prefetch:1
                  2⤵
                    PID:2448
                  • C:\Program Files\Google\Chrome\Application\chrome.exe
                    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.ProcessorMetrics --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=4716 --field-trial-handle=1828,i,17668373987921974059,17978533433565581739,131072 /prefetch:8
                    2⤵
                      PID:4664
                    • C:\Program Files\Google\Chrome\Application\chrome.exe
                      "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5100 --field-trial-handle=1828,i,17668373987921974059,17978533433565581739,131072 /prefetch:8
                      2⤵
                        PID:3860
                      • C:\Program Files\Google\Chrome\Application\chrome.exe
                        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --lang=en-US --service-sandbox-type=service --mojo-platform-channel-handle=5140 --field-trial-handle=1828,i,17668373987921974059,17978533433565581739,131072 /prefetch:8
                        2⤵
                          PID:3504
                        • C:\Program Files\Google\Chrome\Application\chrome.exe
                          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=11 --mojo-platform-channel-handle=4444 --field-trial-handle=1828,i,17668373987921974059,17978533433565581739,131072 /prefetch:1
                          2⤵
                            PID:2848
                          • C:\Program Files\Google\Chrome\Application\chrome.exe
                            "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=952 --field-trial-handle=1828,i,17668373987921974059,17978533433565581739,131072 /prefetch:8
                            2⤵
                              PID:4628
                            • C:\Program Files\Google\Chrome\Application\chrome.exe
                              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=13 --mojo-platform-channel-handle=3952 --field-trial-handle=1828,i,17668373987921974059,17978533433565581739,131072 /prefetch:1
                              2⤵
                                PID:4344
                              • C:\Program Files\Google\Chrome\Application\chrome.exe
                                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=14 --mojo-platform-channel-handle=3432 --field-trial-handle=1828,i,17668373987921974059,17978533433565581739,131072 /prefetch:1
                                2⤵
                                  PID:5044
                                • C:\Program Files\Google\Chrome\Application\chrome.exe
                                  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=15 --mojo-platform-channel-handle=3184 --field-trial-handle=1828,i,17668373987921974059,17978533433565581739,131072 /prefetch:1
                                  2⤵
                                    PID:4820
                                  • C:\Program Files\Google\Chrome\Application\chrome.exe
                                    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=16 --mojo-platform-channel-handle=2736 --field-trial-handle=1828,i,17668373987921974059,17978533433565581739,131072 /prefetch:1
                                    2⤵
                                      PID:3772
                                    • C:\Program Files\Google\Chrome\Application\chrome.exe
                                      "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=17 --mojo-platform-channel-handle=5152 --field-trial-handle=1828,i,17668373987921974059,17978533433565581739,131072 /prefetch:1
                                      2⤵
                                        PID:800
                                      • C:\Program Files\Google\Chrome\Application\chrome.exe
                                        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=18 --mojo-platform-channel-handle=3464 --field-trial-handle=1828,i,17668373987921974059,17978533433565581739,131072 /prefetch:1
                                        2⤵
                                          PID:3236
                                      • C:\Program Files\Google\Chrome\Application\106.0.5249.119\elevation_service.exe
                                        "C:\Program Files\Google\Chrome\Application\106.0.5249.119\elevation_service.exe"
                                        1⤵
                                          PID:4324

                                        Network

                                              MITRE ATT&CK Enterprise v15

                                              Replay Monitor

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                                              Downloads

                                              f_000015

                                              • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Cache\Cache_Data\f_000015
                                              • Size 106KB
                                              • SHA256 d2236b94ac1e28588be6609b6320fd429146a70e97f37e2a4d70410cb15990ff
                                              • MD5 SHA1 SHA512 SSDEEP

                                              the-real-index

                                              • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Code Cache\js\index-dir\the-real-index
                                              • Size 1KB
                                              • SHA256 051f51132780f79bc63369b79bc271695e6f3189a3ac9f8ad6cd9094a5794b2b
                                              • MD5 SHA1 SHA512

                                              data_1

                                              • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\GPUCache\data_1
                                              • Size 264KB
                                              • SHA256 7b02ee3e29d8b55774672a683f3fe934fa0bee3269da107050fab7a68cbc2dcb
                                              • MD5 SHA1 SHA512 SSDEEP

                                              Network Persistent State

                                              • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\Network Persistent State
                                              • Size 5KB
                                              • SHA256 a0ac633b39a99f151f59cf7adf8d5d4f5f9bf8642462f10b8c3a128ae42cdb91
                                              • MD5 SHA1 SHA512 SSDEEP

                                              Network Persistent State

                                              • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\Network Persistent State
                                              • Size 2KB
                                              • SHA256 7e33857456f76d3a8093b37c30bd6178f323ae07096472f18dd235430ab1fc16
                                              • MD5 SHA1 SHA512

                                              TransportSecurity

                                              • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\TransportSecurity
                                              • Size 2KB
                                              • SHA256 7b10ffe682ef14dee83b3b636210131a8e57134bf0261e667f48bf7b99334341
                                              • MD5 SHA1 SHA512

                                              TransportSecurity

                                              • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\TransportSecurity
                                              • Size 371B
                                              • SHA256 12ae03763ffe1710faaeba0b5aee27314150048a3cfdc385e8b92861d8e98d98
                                              • MD5 SHA1 SHA512

                                              Preferences

                                              • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences
                                              • Size 7KB
                                              • SHA256 52ee36ce375d556d94128d65c79fc57b7c3f0baca3c05d67cec749e9c3459971
                                              • MD5 SHA1 SHA512 SSDEEP

                                              Preferences

                                              • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences
                                              • Size 6KB
                                              • SHA256 8aab76201affb4f0c6f03ba225298f37c594911a62c690eccdc4163f717addb1
                                              • MD5 SHA1 SHA512 SSDEEP

                                              Preferences

                                              • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences
                                              • Size 6KB
                                              • SHA256 b39b57f5889c9e9a793060d3ba00a5f5a589239cfa5f4a579ae4e0f7ae4ca2e9
                                              • MD5 SHA1 SHA512 SSDEEP

                                              Preferences

                                              • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences
                                              • Size 6KB
                                              • SHA256 0fe62d5cf714b17a1e60de1836204715b1458f6c30efda3219a593959f551020
                                              • MD5 SHA1 SHA512 SSDEEP

                                              Secure Preferences

                                              • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Secure Preferences
                                              • Size 15KB
                                              • SHA256 98b0dba92f6fa6559e9eade9d68671a62ced4d2852021a924f82a7e2c96cd36c
                                              • MD5 SHA1 SHA512 SSDEEP

                                              Local State

                                              • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Local State
                                              • Size 262KB
                                              • SHA256 45226ac36aaabc3497133c9a68fb17f2eaf5be255849f7de0c47e38c45864983
                                              • MD5 SHA1 SHA512 SSDEEP

                                              Local State

                                              • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Local State
                                              • Size 262KB
                                              • SHA256 5071486e4bba355dbe5575d69f88d44d5cc13b5980cf8fe50640f708d7d9739b
                                              • MD5 SHA1 SHA512 SSDEEP

                                              Module Info Cache

                                              • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Module Info Cache
                                              • Size 94KB
                                              • SHA256 48020208362de469b490ec7d478f41f567490e8dc9eea8f9400d07e0dc2ece01
                                              • MD5 SHA1 SHA512 SSDEEP

                                              Module Info Cache~RFe58a321.TMP

                                              • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Module Info Cache~RFe58a321.TMP
                                              • Size 89KB
                                              • SHA256 d502965b08b25a666fd52b5c0bb87312b710a4d7a9374f615e2b4a5aaa5b245d
                                              • MD5 SHA1 SHA512 SSDEEP

                                              persisted_first_party_sets.json

                                              • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\persisted_first_party_sets.json
                                              • Size 2B
                                              • SHA256 44136fa355b3678a1146ad16f7e8649e94fb4fc21fe77e8310c060f61caaff8a
                                              • MD5 SHA1 SHA512