Analysis

  • max time kernel
    126s
  • max time network
    98s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30-11-2024 21:44

General

  • Target

    kisteruop.exe

  • Size

    239KB

  • MD5

    aa7c3909bcc04a969a1605522b581a49

  • SHA1

    e6b0be06c7a8eb57fc578c40369f06360e9d70c9

  • SHA256

    19fcd2a83cd54c9b1c9bd9f8f6f7792e7132156b09a8180ce1da2fe6e2eeaaab

  • SHA512

    f06b7e9efe312a659fd047c80df637dba7938035b3fd5f03f4443047f4324af9234c28309b0b927b70834d15d06f0d8e8a78ba6bd7a6db62c375df3974ce8bd0

  • SSDEEP

    3072:QLCrbK4vn4p+U1v+N3Bz1IJ8JEchyka7Z7LU/fHY5rrr2MJ08:WaGm1U5Y1ICJU117L+45rrr2qz

Malware Config

Extracted

Family

stealc

Botnet

Voov

C2

http://154.216.17.90

Attributes
  • url_path

    /a48146f6763ef3af.php

Signatures

  • Stealc

    Stealc is an infostealer written in C++.

  • Stealc family
  • Downloads MZ/PE file
  • Uses browser remote debugging 2 TTPs 9 IoCs

    Can be used control the browser and steal sensitive information such as credentials and session cookies.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Loads dropped DLL 2 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Unsecured Credentials: Credentials In Files 1 TTPs

    Steal credentials from unsecured files.

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Checks processor information in registry 2 TTPs 5 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Delays execution with timeout.exe 1 IoCs
  • Enumerates system info in registry 2 TTPs 8 IoCs
  • Modifies data under HKEY_USERS 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 20 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 12 IoCs
  • Suspicious use of FindShellTrayWindow 51 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\kisteruop.exe
    "C:\Users\Admin\AppData\Local\Temp\kisteruop.exe"
    1⤵
    • Checks computer location settings
    • Loads dropped DLL
    • System Location Discovery: System Language Discovery
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1216
    • C:\Program Files\Google\Chrome\Application\chrome.exe
      "C:\Program Files\Google\Chrome\Application\chrome.exe" --remote-debugging-port=9229 --profile-directory=""
      2⤵
      • Uses browser remote debugging
      • 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 WriteProcessMemory
      PID:520
      • 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:4 --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=123.0.6312.123 --initial-client-data=0xf8,0xfc,0x100,0xd4,0x104,0x7ffb688bcc40,0x7ffb688bcc4c,0x7ffb688bcc58
        3⤵
          PID:3236
        • C:\Program Files\Google\Chrome\Application\chrome.exe
          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --no-appcompat-clear --gpu-preferences=WAAAAAAAAADgAAAMAAAAAAAAAAAAAAAAAABgAAEAAAA4AAAAAAAAAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGAAAAAAAAAAYAAAAAAAAAAgAAAAAAAAACAAAAAAAAAAIAAAAAAAAAA== --field-trial-handle=2016,i,6059151346466400614,2550230518123181404,262144 --variations-seed-version=20241006-180150.222000 --mojo-platform-channel-handle=2012 /prefetch:2
          3⤵
            PID:772
          • 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 --no-appcompat-clear --field-trial-handle=1828,i,6059151346466400614,2550230518123181404,262144 --variations-seed-version=20241006-180150.222000 --mojo-platform-channel-handle=2488 /prefetch:3
            3⤵
              PID:4804
            • 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=service --no-appcompat-clear --field-trial-handle=2152,i,6059151346466400614,2550230518123181404,262144 --variations-seed-version=20241006-180150.222000 --mojo-platform-channel-handle=2604 /prefetch:8
              3⤵
                PID:2436
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --no-appcompat-clear --remote-debugging-port=9229 --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --field-trial-handle=3156,i,6059151346466400614,2550230518123181404,262144 --variations-seed-version=20241006-180150.222000 --mojo-platform-channel-handle=3184 /prefetch:1
                3⤵
                • Uses browser remote debugging
                PID:824
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --no-appcompat-clear --remote-debugging-port=9229 --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --field-trial-handle=3200,i,6059151346466400614,2550230518123181404,262144 --variations-seed-version=20241006-180150.222000 --mojo-platform-channel-handle=3256 /prefetch:1
                3⤵
                • Uses browser remote debugging
                PID:388
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --no-appcompat-clear --remote-debugging-port=9229 --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=7 --field-trial-handle=3180,i,6059151346466400614,2550230518123181404,262144 --variations-seed-version=20241006-180150.222000 --mojo-platform-channel-handle=4424 /prefetch:1
                3⤵
                • Uses browser remote debugging
                PID:1296
              • 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 --no-appcompat-clear --field-trial-handle=4284,i,6059151346466400614,2550230518123181404,262144 --variations-seed-version=20241006-180150.222000 --mojo-platform-channel-handle=4840 /prefetch:8
                3⤵
                  PID:4584
                • 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 --no-appcompat-clear --field-trial-handle=4904,i,6059151346466400614,2550230518123181404,262144 --variations-seed-version=20241006-180150.222000 --mojo-platform-channel-handle=4836 /prefetch:8
                  3⤵
                    PID:2544
                • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --remote-debugging-port=9229 --profile-directory="Default"
                  2⤵
                  • Uses browser remote debugging
                  • Enumerates system info in registry
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
                  • Suspicious use of FindShellTrayWindow
                  PID:5000
                  • 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=0xfc,0x100,0x104,0xd8,0x108,0x7ffb68d046f8,0x7ffb68d04708,0x7ffb68d04718
                    3⤵
                    • Checks processor information in registry
                    • Enumerates system info in registry
                    • Suspicious behavior: EnumeratesProcesses
                    PID:4436
                  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=gpu-process --field-trial-handle=2168,12166800928403388160,8391063865609729825,131072 --gpu-preferences=UAAAAAAAAADgAAAQAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHgAAAAAAAAAeAAAAAAAAAAoAAAABAAAACAAAAAAAAAAKAAAAAAAAAAwAAAAAAAAADgAAAAAAAAAEAAAAAAAAAAAAAAADQAAABAAAAAAAAAAAQAAAA0AAAAQAAAAAAAAAAQAAAANAAAAEAAAAAAAAAAHAAAADQAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=2152 /prefetch:2
                    3⤵
                      PID:2464
                    • 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=2168,12166800928403388160,8391063865609729825,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=2300 /prefetch:3
                      3⤵
                      • Suspicious behavior: EnumeratesProcesses
                      PID:3716
                    • 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=2168,12166800928403388160,8391063865609729825,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=2832 /prefetch:8
                      3⤵
                        PID:1360
                      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --remote-debugging-port=9229 --field-trial-handle=2168,12166800928403388160,8391063865609729825,131072 --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=3320 /prefetch:1
                        3⤵
                        • Uses browser remote debugging
                        PID:400
                      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --remote-debugging-port=9229 --field-trial-handle=2168,12166800928403388160,8391063865609729825,131072 --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=5 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3336 /prefetch:1
                        3⤵
                        • Uses browser remote debugging
                        PID:2356
                      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --remote-debugging-port=9229 --field-trial-handle=2168,12166800928403388160,8391063865609729825,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=7 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=4552 /prefetch:1
                        3⤵
                        • Uses browser remote debugging
                        PID:4312
                      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --remote-debugging-port=9229 --field-trial-handle=2168,12166800928403388160,8391063865609729825,131072 --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=8 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=4500 /prefetch:1
                        3⤵
                        • Uses browser remote debugging
                        PID:4432
                    • C:\Windows\SysWOW64\cmd.exe
                      "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kisteruop.exe" & del "C:\ProgramData\*.dll"" & exit
                      2⤵
                      • System Location Discovery: System Language Discovery
                      PID:228
                      • C:\Windows\SysWOW64\timeout.exe
                        timeout /t 5
                        3⤵
                        • System Location Discovery: System Language Discovery
                        • Delays execution with timeout.exe
                        PID:3188
                  • C:\Program Files\Google\Chrome\Application\123.0.6312.123\elevation_service.exe
                    "C:\Program Files\Google\Chrome\Application\123.0.6312.123\elevation_service.exe"
                    1⤵
                      PID:4268
                    • C:\Windows\system32\svchost.exe
                      C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s NgcSvc
                      1⤵
                        PID:1292

                      Network

                      MITRE ATT&CK Enterprise v15

                      Replay Monitor

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                      Downloads

                      • C:\ProgramData\mozglue.dll

                        Filesize

                        593KB

                        MD5

                        c8fd9be83bc728cc04beffafc2907fe9

                        SHA1

                        95ab9f701e0024cedfbd312bcfe4e726744c4f2e

                        SHA256

                        ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

                        SHA512

                        fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

                      • C:\ProgramData\nss3.dll

                        Filesize

                        2.0MB

                        MD5

                        1cc453cdf74f31e4d913ff9c10acdde2

                        SHA1

                        6e85eae544d6e965f15fa5c39700fa7202f3aafe

                        SHA256

                        ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

                        SHA512

                        dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

                      • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\BrowsingTopicsState

                        Filesize

                        649B

                        MD5

                        bd5ee49c742e4faff2af5d1868ec5426

                        SHA1

                        c50d80f11daf26d1d321cfde6ed69b4e22b58c2e

                        SHA256

                        69a43040c2bb766f16b8f298c0986967ce290dee9fbc253086dc389f70acb491

                        SHA512

                        0404ccac05632ce3f966005fd49488aa9c107f0d87b6f32c195281cc4db2af49b08e34504004032c85f1bc5b7e9e6fb2946f2a614f62fe701ef027b956c80166

                      • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\SCT Auditing Pending Reports

                        Filesize

                        2B

                        MD5

                        d751713988987e9331980363e24189ce

                        SHA1

                        97d170e1550eee4afc0af065b78cda302a97674c

                        SHA256

                        4f53cda18c2baa0c0354bb5f9a3ecbe5ed12ab4d8e11ba873c2f11161202b945

                        SHA512

                        b25b294cb4deb69ea00a4c3cf3113904801b6015e5956bd019a8570b1fe1d6040e944ef3cdee16d0a46503ca6e659a25f21cf9ceddc13f352a3c98138c15d6af

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

                        Filesize

                        152B

                        MD5

                        37f660dd4b6ddf23bc37f5c823d1c33a

                        SHA1

                        1c35538aa307a3e09d15519df6ace99674ae428b

                        SHA256

                        4e2510a1d5a50a94fe4ce0f74932ab780758a8cbdc6d176a9ce8ab92309f26f8

                        SHA512

                        807b8b8dc9109b6f78fc63655450bf12b9a006ff63e8f29ade8899d45fdf4a6c068c5c46a3efbc4232b9e1e35d6494f00ded5cdb3e235c8a25023bfbd823992d

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

                        Filesize

                        152B

                        MD5

                        d7cb450b1315c63b1d5d89d98ba22da5

                        SHA1

                        694005cd9e1a4c54e0b83d0598a8a0c089df1556

                        SHA256

                        38355fd694faf1223518e40bac1996bdceaf44191214b0a23c4334d5fb07d031

                        SHA512

                        df04d4f4b77bae447a940b28aeac345b21b299d8d26e28ecbb3c1c9e9a0e07c551e412d545c7dbb147a92c12bad7ae49ac35af021c34b88e2c6c5f7a0b65f6a8

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

                        Filesize

                        5KB

                        MD5

                        19567864e26ecaedb64d169c30cefbb4

                        SHA1

                        b3be6b713bd4624869d9a87fd0707ce9898cdd0d

                        SHA256

                        e14a82f7973068c4fbbf9544c52f4f948a611c1a7cb2e07b8655d087edfc5468

                        SHA512

                        7876f7f5117eb63b57d7928a9637672783a2b2a7c56c0b5242f524b2a429ee2ade6bd23dbb3744e81930712a1ab47844c9444ceb19916a1b02693e23d997934c

                      • memory/1216-0-0x0000000000800000-0x0000000000A50000-memory.dmp

                        Filesize

                        2.3MB

                      • memory/1216-1-0x0000000061E00000-0x0000000061EF3000-memory.dmp

                        Filesize

                        972KB

                      • memory/1216-130-0x0000000000800000-0x0000000000A50000-memory.dmp

                        Filesize

                        2.3MB