Resubmissions

09/08/2024, 14:50

240809-r7sxbssalp

09/08/2024, 14:35

240809-rx9r4awakb10

09/08/2024, 14:34

240809-rxj7fawajg10

Analysis

  • max time kernel
    107s
  • max time network
    111s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09/08/2024, 14:35

General

  • Target
    SolaraBootstrapper.exe
  • Size 303KB
  • Sample240809-rx9r4awakb
  • SHA256 12a8d265fe2c0fb139d2dc9994ebdfaf7aea93a2ecc18dc4e132f1a04d36eda6
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • 44caliber

C2
  • https://discord.com/api/webhooks/1256365156401680444/Q4ybvTW8-P8cHM7v5CKOThKUJqTZ4f03jPUNC4To8TouPRnWl442RcsKLBOptm6uvg63

Signatures

  • 44Caliber

    An open source infostealer written in C#.

  • Credentials from Password Stores: Credentials from Web Browsers 1 TTPs

    Malicious Access or copy of Web Browser Credential store.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Looks up external IP address via web service 2 IoCs

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

  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 11 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 17 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of FindShellTrayWindow 25 IoCs
  • Suspicious use of SendNotifyMessage 24 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe
    "C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:4848
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"
    1⤵
    • Enumerates system info in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:3636
    • 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=0x11c,0x120,0x124,0xf8,0x128,0x7ffe460046f8,0x7ffe46004708,0x7ffe46004718
      2⤵
        PID:3748
      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=gpu-process --field-trial-handle=2036,434573386192905254,5104499901688269089,131072 --gpu-preferences=UAAAAAAAAADgAAAQAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHgAAAAAAAAAeAAAAAAAAAAoAAAABAAAACAAAAAAAAAAKAAAAAAAAAAwAAAAAAAAADgAAAAAAAAAEAAAAAAAAAAAAAAADQAAABAAAAAAAAAAAQAAAA0AAAAQAAAAAAAAAAQAAAANAAAAEAAAAAAAAAAHAAAADQAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=2044 /prefetch:2
        2⤵
          PID:5108
        • 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=2036,434573386192905254,5104499901688269089,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=2348 /prefetch:3
          2⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:4552
        • 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=2036,434573386192905254,5104499901688269089,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=2336 /prefetch:8
          2⤵
            PID:3116
          • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
            "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2036,434573386192905254,5104499901688269089,131072 --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=3392 /prefetch:1
            2⤵
              PID:1552
            • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
              "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2036,434573386192905254,5104499901688269089,131072 --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=3400 /prefetch:1
              2⤵
                PID:2556
              • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2036,434573386192905254,5104499901688269089,131072 --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=4980 /prefetch:1
                2⤵
                  PID:908
                • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2036,434573386192905254,5104499901688269089,131072 --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=4684 /prefetch:1
                  2⤵
                    PID:4284
                  • C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe
                    "C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe" --type=utility --utility-sub-type=winrt_app_id.mojom.WinrtAppIdService --field-trial-handle=2036,434573386192905254,5104499901688269089,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5380 /prefetch:8
                    2⤵
                      PID:4908
                    • C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe
                      "C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe" --type=utility --utility-sub-type=winrt_app_id.mojom.WinrtAppIdService --field-trial-handle=2036,434573386192905254,5104499901688269089,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5380 /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=2036,434573386192905254,5104499901688269089,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=10 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=4812 /prefetch:1
                      2⤵
                        PID:5116
                      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2036,434573386192905254,5104499901688269089,131072 --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=11 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=4712 /prefetch:1
                        2⤵
                          PID:4532
                        • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                          "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2036,434573386192905254,5104499901688269089,131072 --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=4108 /prefetch:1
                          2⤵
                            PID:1648
                          • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                            "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2036,434573386192905254,5104499901688269089,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=13 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5572 /prefetch:1
                            2⤵
                              PID:3612
                            • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                              "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2036,434573386192905254,5104499901688269089,131072 --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=5744 /prefetch:1
                              2⤵
                                PID:3032
                              • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                                "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2036,434573386192905254,5104499901688269089,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=15 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5524 /prefetch:1
                                2⤵
                                  PID:1852
                                • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                                  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2036,434573386192905254,5104499901688269089,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=16 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=6036 /prefetch:1
                                  2⤵
                                    PID:3100
                                  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                                    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2036,434573386192905254,5104499901688269089,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=17 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=4172 /prefetch:1
                                    2⤵
                                      PID:4264
                                    • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                                      "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2036,434573386192905254,5104499901688269089,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=18 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5896 /prefetch:1
                                      2⤵
                                        PID:4088
                                      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                                        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2036,434573386192905254,5104499901688269089,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=19 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5744 /prefetch:1
                                        2⤵
                                          PID:1848
                                        • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                                          "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=audio.mojom.AudioService --field-trial-handle=2036,434573386192905254,5104499901688269089,131072 --lang=en-US --service-sandbox-type=audio --mojo-platform-channel-handle=6112 /prefetch:8
                                          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=video_capture.mojom.VideoCaptureService --field-trial-handle=2036,434573386192905254,5104499901688269089,131072 --lang=en-US --service-sandbox-type=video_capture --mojo-platform-channel-handle=5764 /prefetch:8
                                            2⤵
                                            • Modifies registry class
                                            • Suspicious behavior: EnumeratesProcesses
                                            PID:4500
                                          • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                                            "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2036,434573386192905254,5104499901688269089,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=22 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=6268 /prefetch:1
                                            2⤵
                                              PID:1996
                                            • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                                              "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2036,434573386192905254,5104499901688269089,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=23 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=6076 /prefetch:1
                                              2⤵
                                                PID:4820
                                              • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                                                "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2036,434573386192905254,5104499901688269089,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=24 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=6300 /prefetch:1
                                                2⤵
                                                  PID:116
                                              • C:\Windows\System32\CompPkgSrv.exe
                                                C:\Windows\System32\CompPkgSrv.exe -Embedding
                                                1⤵
                                                  PID:2996
                                                • C:\Windows\System32\CompPkgSrv.exe
                                                  C:\Windows\System32\CompPkgSrv.exe -Embedding
                                                  1⤵
                                                    PID:2152

                                                  Network

                                                        MITRE ATT&CK Enterprise v15

                                                        Replay Monitor

                                                        Loading Replay Monitor...

                                                        Downloads

                                                        settings.dat

                                                        • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad\settings.dat
                                                        • Size 152B
                                                        • SHA256 183b8e82a0deaa83d04736553671cedb738adc909f483b3c5f822a0e6be7477d
                                                        • MD5 SHA1 SHA512

                                                        1c615d3e-a2c5-4ad7-8ef7-52cbf39033be.tmp

                                                        • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\1c615d3e-a2c5-4ad7-8ef7-52cbf39033be.tmp
                                                        • Size 6KB
                                                        • SHA256 edeebed59d1a7898d0d7bddc46074d7025ba14774c93c4315598dc91451bbcfa
                                                        • MD5 SHA1 SHA512 SSDEEP

                                                        f_00001b

                                                        • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Cache\f_00001b
                                                        • Size 210KB
                                                        • SHA256 04d7bf7a6586ef00516bdb3f7b96c65e0b9c6b940f4b145121ed00f6116bbb77
                                                        • MD5 SHA1 SHA512 SSDEEP

                                                        the-real-index

                                                        • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Code Cache\js\index-dir\the-real-index
                                                        • Size 1KB
                                                        • SHA256 486916400927e85c357e44dca0f5a10d3500c73486fa6e6aac6445df2c25e17d
                                                        • MD5 SHA1 SHA512

                                                        Network Persistent State

                                                        • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Network Persistent State
                                                        • Size 968B
                                                        • SHA256 ff76bf41cb23dbba927be59b9ca6214a5fe32b763a0808458a5eedbee515d7d9
                                                        • MD5 SHA1 SHA512

                                                        Preferences

                                                        • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Preferences
                                                        • Size 7KB
                                                        • SHA256 f73f6546a7b2e25801e54e01c5b54081969c3285726555564e939f77abcfe5ff
                                                        • MD5 SHA1 SHA512 SSDEEP

                                                        Preferences

                                                        • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Preferences
                                                        • Size 8KB
                                                        • SHA256 eefb2163d68c178c2769bd69a7eefa81542433b3f1da17c555206653d16f1d2c
                                                        • MD5 SHA1 SHA512 SSDEEP

                                                        Preferences

                                                        • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Preferences
                                                        • Size 6KB
                                                        • SHA256 c6fce06a607944c6380b6f5658e4858c0926d61ce43ca69a804cee99086401c8
                                                        • MD5 SHA1 SHA512 SSDEEP

                                                        TransportSecurity

                                                        • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\TransportSecurity
                                                        • Size 870B
                                                        • SHA256 fcbbbecb65b6d0f625b713932642af92a0d5c2cffd5d38f7eb18c352570bb865
                                                        • MD5 SHA1 SHA512

                                                        TransportSecurity

                                                        • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\TransportSecurity
                                                        • Size 1KB
                                                        • SHA256 dc085dc566d1a6093aec53d0e26cd3cf19306aa940fcdf8a1514d47673835a12
                                                        • MD5 SHA1 SHA512

                                                        TransportSecurity

                                                        • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\TransportSecurity
                                                        • Size 1KB
                                                        • SHA256 ffd2ec5f965db6895226d96151744b1eaa651547900f4357c65c44aca756c1e8
                                                        • MD5 SHA1 SHA512

                                                        TransportSecurity~RFe58dc03.TMP

                                                        • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\TransportSecurity~RFe58dc03.TMP
                                                        • Size 703B
                                                        • SHA256 0767e63631095e882bfc01c57a2c58ec8ab2caeaf0ffa42d63076a064fa86509
                                                        • MD5 SHA1 SHA512

                                                        CURRENT

                                                        • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\data_reduction_proxy_leveldb\CURRENT
                                                        • Size 16B
                                                        • SHA256 0861415cada612ea5834d56e2cf1055d3e63979b69eb71d32ae9ae394d8306cd
                                                        • MD5 SHA1 SHA512

                                                        Local State

                                                        • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Local State
                                                        • Size 11KB
                                                        • SHA256 d3e1cd5a6b936c71cd679542ae9e2e2183612ce0deac14b6b5ba3a9af6928be4
                                                        • MD5 SHA1 SHA512 SSDEEP

                                                        default.dic

                                                        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Spelling\en-US\default.dic
                                                        • Size 2B
                                                        • SHA256 b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209
                                                        • MD5 SHA1 SHA512

                                                        memory/4848-1-0x00007FFE45553000-0x00007FFE45555000-memory.dmp

                                                        memory/4848-34-0x00007FFE45550000-0x00007FFE46011000-memory.dmp

                                                        memory/4848-29-0x00007FFE45550000-0x00007FFE46011000-memory.dmp

                                                        memory/4848-0-0x0000023F0FEF0000-0x0000023F0FF42000-memory.dmp