Analysis

  • max time kernel
    103s
  • max time network
    104s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    27/06/2022, 03:52

General

  • Target

    001405ded84e227092bafe165117888d423719d7d75554025ec410d1d6558925.exe

  • Size

    3.2MB

  • MD5

    cd2eb880ecbad847cb6205a42708e5e4

  • SHA1

    aadaba5e4d887136cbcb3df0a4dc0eb94f391585

  • SHA256

    001405ded84e227092bafe165117888d423719d7d75554025ec410d1d6558925

  • SHA512

    b0591d6e4181275001fdefb70e04bdeb1b241dc696a887f36375826904bc164714bfe5d0b86e39952f877309571b9a0212ca5e5f122c6393cb17a797b0c2f8b2

Score
10/10

Malware Config

Extracted

Family

rustybuer

C2

https://vesupyny.com/

Signatures

  • RustyBuer

    RustyBuer is a new variant of Buer loader written in Rust.

  • Enumerates connected drives 3 TTPs 49 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of FindShellTrayWindow 35 IoCs
  • Suspicious use of SendNotifyMessage 32 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\001405ded84e227092bafe165117888d423719d7d75554025ec410d1d6558925.exe
    "C:\Users\Admin\AppData\Local\Temp\001405ded84e227092bafe165117888d423719d7d75554025ec410d1d6558925.exe"
    1⤵
    • Suspicious use of SetThreadContext
    PID:1864
    • C:\Windows\SysWOW64\secinit.exe
      "C:\Windows\System32\secinit.exe"
      2⤵
      • Enumerates connected drives
      • Suspicious behavior: EnumeratesProcesses
      PID:1792
  • C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe"
    1⤵
    • Enumerates system info in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:1796
    • 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=89.0.4389.114 --initial-client-data=0xc0,0xc4,0xc8,0x94,0xcc,0x7fef6ba4f50,0x7fef6ba4f60,0x7fef6ba4f70
      2⤵
        PID:864
      • C:\Program Files\Google\Chrome\Application\chrome.exe
        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --field-trial-handle=1084,18402270619270658843,16171066398311598286,131072 --gpu-preferences=SAAAAAAAAADgAAAwAAAAAAAAAAAAAAAAAABgAAAAAAAoAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAB4AAAAAAAAAHgAAAAAAAAAKAAAAAQAAAAgAAAAAAAAACgAAAAAAAAAMAAAAAAAAAA4AAAAAAAAABAAAAAAAAAAAAAAAAUAAAAQAAAAAAAAAAAAAAAGAAAAEAAAAAAAAAABAAAABQAAABAAAAAAAAAAAQAAAAYAAAAIAAAAAAAAAAgAAAAAAAAA --mojo-platform-channel-handle=1100 /prefetch:2
        2⤵
          PID:1332
        • C:\Program Files\Google\Chrome\Application\chrome.exe
          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --field-trial-handle=1084,18402270619270658843,16171066398311598286,131072 --lang=en-US --service-sandbox-type=network --mojo-platform-channel-handle=1436 /prefetch:8
          2⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:476
        • C:\Program Files\Google\Chrome\Application\chrome.exe
          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --field-trial-handle=1084,18402270619270658843,16171066398311598286,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=1796 /prefetch:8
          2⤵
            PID:1216
          • C:\Program Files\Google\Chrome\Application\chrome.exe
            "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --field-trial-handle=1084,18402270619270658843,16171066398311598286,131072 --lang=en-US --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=5 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=2104 /prefetch:1
            2⤵
              PID:1940
            • C:\Program Files\Google\Chrome\Application\chrome.exe
              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --field-trial-handle=1084,18402270619270658843,16171066398311598286,131072 --lang=en-US --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=6 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=2064 /prefetch:1
              2⤵
                PID:1192
              • 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 --field-trial-handle=1084,18402270619270658843,16171066398311598286,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=3056 /prefetch:8
                2⤵
                  PID:240
                • C:\Program Files\Google\Chrome\Application\chrome.exe
                  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --field-trial-handle=1084,18402270619270658843,16171066398311598286,131072 --gpu-preferences=SAAAAAAAAADgAAAwAAAAAAAAAAAAAAAAAABgAAAAAAAoAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAB4AAAAAAAAAHgAAAAAAAAAKAAAAAQAAAAgAAAAAAAAACgAAAAAAAAAMAAAAAAAAAA4AAAAAAAAABAAAAAAAAAAAAAAAAUAAAAQAAAAAAAAAAAAAAAGAAAAEAAAAAAAAAABAAAABQAAABAAAAAAAAAAAQAAAAYAAAAIAAAAAAAAAAgAAAAAAAAA --use-gl=swiftshader-webgl --mojo-platform-channel-handle=3292 /prefetch:2
                  2⤵
                    PID:1376
                  • C:\Program Files\Google\Chrome\Application\chrome.exe
                    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --field-trial-handle=1084,18402270619270658843,16171066398311598286,131072 --disable-gpu-compositing --lang=en-US --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=9 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=1212 /prefetch:1
                    2⤵
                      PID:1608
                    • 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 --field-trial-handle=1084,18402270619270658843,16171066398311598286,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=3520 /prefetch:8
                      2⤵
                        PID:2064
                      • 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 --field-trial-handle=1084,18402270619270658843,16171066398311598286,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=3528 /prefetch:8
                        2⤵
                          PID:2100
                        • 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 --field-trial-handle=1084,18402270619270658843,16171066398311598286,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=3856 /prefetch:8
                          2⤵
                            PID:2164
                          • 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 --field-trial-handle=1084,18402270619270658843,16171066398311598286,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=3756 /prefetch:8
                            2⤵
                              PID:2156
                            • 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 --field-trial-handle=1084,18402270619270658843,16171066398311598286,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=3656 /prefetch:8
                              2⤵
                                PID:2148
                              • 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 --field-trial-handle=1084,18402270619270658843,16171066398311598286,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=3556 /prefetch:8
                                2⤵
                                  PID:2140
                                • 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 --field-trial-handle=1084,18402270619270658843,16171066398311598286,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=3868 /prefetch:8
                                  2⤵
                                    PID:2288
                                  • C:\Program Files\Google\Chrome\Application\chrome.exe
                                    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --field-trial-handle=1084,18402270619270658843,16171066398311598286,131072 --disable-gpu-compositing --lang=en-US --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=17 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3836 /prefetch:1
                                    2⤵
                                      PID:2344
                                    • C:\Program Files\Google\Chrome\Application\chrome.exe
                                      "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --field-trial-handle=1084,18402270619270658843,16171066398311598286,131072 --disable-gpu-compositing --lang=en-US --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=18 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=2276 /prefetch:1
                                      2⤵
                                        PID:2408
                                      • C:\Program Files\Google\Chrome\Application\chrome.exe
                                        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --field-trial-handle=1084,18402270619270658843,16171066398311598286,131072 --disable-gpu-compositing --lang=en-US --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=19 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3952 /prefetch:1
                                        2⤵
                                          PID:2472
                                        • C:\Program Files\Google\Chrome\Application\chrome.exe
                                          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --field-trial-handle=1084,18402270619270658843,16171066398311598286,131072 --disable-gpu-compositing --lang=en-US --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=20 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=2088 /prefetch:1
                                          2⤵
                                            PID:2480
                                          • C:\Program Files\Google\Chrome\Application\chrome.exe
                                            "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=audio.mojom.AudioService --field-trial-handle=1084,18402270619270658843,16171066398311598286,131072 --lang=en-US --service-sandbox-type=audio --mojo-platform-channel-handle=3420 /prefetch:8
                                            2⤵
                                              PID:2604
                                            • 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 --field-trial-handle=1084,18402270619270658843,16171066398311598286,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=2276 /prefetch:8
                                              2⤵
                                                PID:2612
                                            • C:\Windows\system32\AUDIODG.EXE
                                              C:\Windows\system32\AUDIODG.EXE 0x4f0
                                              1⤵
                                              • Suspicious use of AdjustPrivilegeToken
                                              PID:2688

                                            Network

                                            MITRE ATT&CK Enterprise v6

                                            Replay Monitor

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                                            Downloads

                                            • memory/1792-55-0x0000000000400000-0x0000000000571000-memory.dmp

                                              Filesize

                                              1.4MB

                                            • memory/1792-56-0x0000000000400000-0x0000000000571000-memory.dmp

                                              Filesize

                                              1.4MB

                                            • memory/1792-58-0x0000000000400000-0x0000000000571000-memory.dmp

                                              Filesize

                                              1.4MB

                                            • memory/1792-60-0x0000000000400000-0x0000000000571000-memory.dmp

                                              Filesize

                                              1.4MB

                                            • memory/1792-61-0x0000000000400000-0x0000000000571000-memory.dmp

                                              Filesize

                                              1.4MB

                                            • memory/1792-63-0x0000000000400000-0x0000000000571000-memory.dmp

                                              Filesize

                                              1.4MB

                                            • memory/1792-66-0x0000000000400000-0x0000000000571000-memory.dmp

                                              Filesize

                                              1.4MB

                                            • memory/1792-67-0x0000000000400000-0x0000000000571000-memory.dmp

                                              Filesize

                                              1.4MB

                                            • memory/1792-68-0x0000000000400000-0x0000000000571000-memory.dmp

                                              Filesize

                                              1.4MB