Analysis

  • max time kernel
    20s
  • max time network
    148s
  • platform
    windows11-21h2_x64
  • resource
    win11-20250410-en
  • resource tags

    arch:x64arch:x86image:win11-20250410-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    17/04/2025, 06:43

General

  • Target

    PayrollListorSalaryList.exe

  • Size

    683KB

  • MD5

    269f0def6ce6a10c50f7e84d66a66245

  • SHA1

    b6dea434a16c4450c0f15a3c2db2a8589a11dda2

  • SHA256

    e6563416012431a5d2520d86517a92e9dc6e3fecd18c05ec146b3ed48015898b

  • SHA512

    78adce4e78a3a9b9a641c762311c91730246d168fd76c4a8c8b46c60252bb06ff74415ea8eef186b1b4da4da82dcbfbef09fb5692f3cc36ac2e4d9fb4ba2c14e

  • SSDEEP

    12288:OY/CpiGzdzUfNifQHBfxcYBJnCHYRU7sESS4L0TLmeVDr4+D7/UKz2Pl:OY/oisaNiYhf3HSsET2Nqf9/ml

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

196.251.116.218:2007

Attributes
  • audio_folder

    MicRecords

  • audio_path

    ApplicationPath

  • 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

    true

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-85JH5C

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Guloader family
  • Guloader,Cloudeye

    A shellcode based downloader first seen in 2020.

  • Remcos

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

  • Remcos family
  • Detected Nirsoft tools 4 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 2 IoCs

    Password recovery tool for various web browsers

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 4 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs
  • Drops file in System32 directory 4 IoCs
  • Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 2 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

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

  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\PayrollListorSalaryList.exe
    "C:\Users\Admin\AppData\Local\Temp\PayrollListorSalaryList.exe"
    1⤵
    • Loads dropped DLL
    • Drops file in System32 directory
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:2460
    • C:\Users\Admin\AppData\Local\Temp\PayrollListorSalaryList.exe
      "C:\Users\Admin\AppData\Local\Temp\PayrollListorSalaryList.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious use of NtCreateThreadExHideFromDebugger
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4840
      • C:\ProgramData\Remcos\remcos.exe
        "C:\ProgramData\Remcos\remcos.exe"
        3⤵
        • Executes dropped EXE
        • Drops file in System32 directory
        • System Location Discovery: System Language Discovery
        PID:1080
  • C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c "C:\ProgramData\Remcos\remcos.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4512
    • C:\ProgramData\Remcos\remcos.exe
      C:\ProgramData\Remcos\remcos.exe
      2⤵
      • Executes dropped EXE
      • Drops file in System32 directory
      • System Location Discovery: System Language Discovery
      PID:2020
  • C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c "C:\ProgramData\Remcos\remcos.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:900
    • C:\ProgramData\Remcos\remcos.exe
      C:\ProgramData\Remcos\remcos.exe
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in System32 directory
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      PID:4448
      • C:\ProgramData\Remcos\remcos.exe
        C:\ProgramData\Remcos\remcos.exe
        3⤵
          PID:2152
          • C:\Windows\SysWOW64\recover.exe
            C:\Windows\SysWOW64\recover.exe /stext "C:\Users\Admin\AppData\Local\Temp\dmzsbs"
            4⤵
              PID:2052
            • C:\Windows\SysWOW64\recover.exe
              C:\Windows\SysWOW64\recover.exe /stext "C:\Users\Admin\AppData\Local\Temp\ngnlclhqx"
              4⤵
                PID:2092
              • C:\Windows\SysWOW64\recover.exe
                C:\Windows\SysWOW64\recover.exe /stext "C:\Users\Admin\AppData\Local\Temp\yjsddvsrlmhk"
                4⤵
                  PID:4856
          • C:\Windows\system32\cmd.exe
            C:\Windows\system32\cmd.exe /c "C:\ProgramData\Remcos\remcos.exe"
            1⤵
              PID:2448
              • C:\ProgramData\Remcos\remcos.exe
                C:\ProgramData\Remcos\remcos.exe
                2⤵
                  PID:2568
                  • C:\Windows\SysWOW64\WerFault.exe
                    C:\Windows\SysWOW64\WerFault.exe -u -p 2568 -s 916
                    3⤵
                    • Program crash
                    PID:1840
                  • C:\Windows\SysWOW64\WerFault.exe
                    C:\Windows\SysWOW64\WerFault.exe -u -p 2568 -s 916
                    3⤵
                    • Program crash
                    PID:420
              • C:\Windows\system32\cmd.exe
                C:\Windows\system32\cmd.exe /c "C:\ProgramData\Remcos\remcos.exe"
                1⤵
                  PID:1512
                  • C:\ProgramData\Remcos\remcos.exe
                    C:\ProgramData\Remcos\remcos.exe
                    2⤵
                      PID:3216
                  • C:\Windows\SysWOW64\WerFault.exe
                    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2568 -ip 2568
                    1⤵
                      PID:3232
                    • C:\Windows\SysWOW64\WerFault.exe
                      C:\Windows\SysWOW64\WerFault.exe -pss -s 564 -p 2568 -ip 2568
                      1⤵
                        PID:1492

                      Network

                      MITRE ATT&CK Enterprise v16

                      Replay Monitor

                      Loading Replay Monitor...

                      Downloads

                      • C:\ProgramData\Remcos\remcos.exe

                        Filesize

                        683KB

                        MD5

                        269f0def6ce6a10c50f7e84d66a66245

                        SHA1

                        b6dea434a16c4450c0f15a3c2db2a8589a11dda2

                        SHA256

                        e6563416012431a5d2520d86517a92e9dc6e3fecd18c05ec146b3ed48015898b

                        SHA512

                        78adce4e78a3a9b9a641c762311c91730246d168fd76c4a8c8b46c60252bb06ff74415ea8eef186b1b4da4da82dcbfbef09fb5692f3cc36ac2e4d9fb4ba2c14e

                      • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

                        Filesize

                        1KB

                        MD5

                        6f8520b24639f17b1b4543d799f3919e

                        SHA1

                        eaf295778eab36eb9e35d84ddcc10b1ca3bf7900

                        SHA256

                        01dbbf11dd3c954efe60725e0e91997dd1ac683ba21374c7a4d28b5aa6fe4379

                        SHA512

                        708b2ba30f7c15826da99a90cb30a59b9a129d500502153de13f0c46d25d6d2fcf155cbb9de0973d3eea8e5b691f566d68f1c6d420127ead6142835600d1e778

                      • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B3513D73A177A2707D910183759B389B_D1B2C3FDC4CC18AB2F25B2BB5E2D4A02

                        Filesize

                        471B

                        MD5

                        1d4632adbc075ecbc910f1dc1ea7aab7

                        SHA1

                        aefef0d5a36d2ccbb0269d89acd7607c185563b9

                        SHA256

                        da21852c5ec264fdf502462af387cc11b877e6df1a9cf6aa11634f084bde188f

                        SHA512

                        e024a6cc7f80cf0b70479bb3d98593f7b2ee07ecf37eaa892a828f889614cdce3a6a3cb203a02d7150b593f2f48e9bf1e80635b07f2fe6d2a7f5685f6b9fe34b

                      • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

                        Filesize

                        410B

                        MD5

                        65be65371bbe7d5bd948abebeef73f1d

                        SHA1

                        d3bef6aed624692a71a8b04e98382598996dece2

                        SHA256

                        396ad8bb5c818757864e3bebb269a27cc78974ba60cbcdba69531bdc9c17cba4

                        SHA512

                        cfa334f1c3dd078dd67b908e199bbc2ce702aa48449604e472b62ae6af63493d6a91f86c9e9b8d29fcf58ebf273ff71c51544acf2e82b37ca5e2a4f408eb8a04

                      • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B3513D73A177A2707D910183759B389B_D1B2C3FDC4CC18AB2F25B2BB5E2D4A02

                        Filesize

                        402B

                        MD5

                        adfc0b8110647b419aa7b778535e452a

                        SHA1

                        974d37d3ef97be5fc37f9e59d78af699ca55013c

                        SHA256

                        42db0b2967b585af99059c9313eb7ada753c7256fa3a10961940038906ca491b

                        SHA512

                        bb388720de4b3b6e4efea0c43927ae87c5af084b104d07b6e91c272552e100a9db0f70c6d2a9dc040d5f9d4ee3b1a4170d08afceb73a0deba7efc6469988a656

                      • C:\Users\Admin\AppData\Local\Temp\nsy5BCE.tmp\System.dll

                        Filesize

                        12KB

                        MD5

                        cff85c549d536f651d4fb8387f1976f2

                        SHA1

                        d41ce3a5ff609df9cf5c7e207d3b59bf8a48530e

                        SHA256

                        8dc562cda7217a3a52db898243de3e2ed68b80e62ddcb8619545ed0b4e7f65a8

                        SHA512

                        531d6328daf3b86d85556016d299798fa06fefc81604185108a342d000e203094c8c12226a12bd6e1f89b0db501fb66f827b610d460b933bd4ab936ac2fd8a88

                      • C:\Users\Admin\hjemmefronter\Synthetase54\Xylophagan\Fidusmagere157.Tra172

                        Filesize

                        64KB

                        MD5

                        85d7dea82be4b91bc6166e2dd623de9c

                        SHA1

                        9b2dd8458a7e01cac8785c2f34d89c1138f7e1bf

                        SHA256

                        96f665a310d726134f78efd1567c25100103e236d6858022dacc2217eaa63d14

                        SHA512

                        c5b3df758a9929ca505e2731f8c8e6c78f46d37db2842c62207c4c02a8775f6ce4ab5c5bb3e848a71d9c8f33ca7325d7f7188db4e57918df8e068650aff949f2

                      • C:\Users\Admin\hjemmefronter\Synthetase54\Xylophagan\Fidusmagere157.Tra172

                        Filesize

                        312KB

                        MD5

                        de89e9a8ab72b9d958dcada9010dff47

                        SHA1

                        cc4146145c5c8bde75ca65edf3fa12e01dc40299

                        SHA256

                        2a838399586680d5ced2ab7a8ee8f12f1eba8af0099c4083b027df7a757e975b

                        SHA512

                        bf52ef11197b84485cf308b15523168a7b6c3090e2d0eda5402f33eceb9cf317dc6dbcd4baa0b37744ffb6697d0c6ff5647c8aa7056c2736cf00b22f96390a07

                      • C:\Users\Admin\hjemmefronter\Synthetase54\Xylophagan\Lamper.jpg

                        Filesize

                        97KB

                        MD5

                        76aa50f1e0bcb4ed44e0da686fb1115a

                        SHA1

                        c2083f4218ab03cb5dd7e1fa12cc5b026a2b63fb

                        SHA256

                        d7e7113a11841604012fdcb8037ca28de5161a3b9ccffcb8440fba1847e128d8

                        SHA512

                        9e295d7881d9e7341f1082221bb5f5ebeee0fa9cb02c6c5ae58194037be23611e5e3a910101afa7509467445a430f459fb3c54016e2874df45781882a0498be4

                      • C:\Users\Admin\hjemmefronter\Synthetase54\Xylophagan\Mallear.uds

                        Filesize

                        92KB

                        MD5

                        fb747707354f75cb2bd552556b0c1d42

                        SHA1

                        0c09a1ccce40052659bdf310569245356dc6bbb9

                        SHA256

                        d7942e26ad71cccb0e61188868aee592a2e203cbe93810fcd36f7c8bca257a34

                        SHA512

                        743244f863cdcc8ad36a020fce5f0948f19fcd7f522091e2342115f60ee945ab85bca907cddd07acc0a0116d564e3a113cb6a925cd98c645a37f108225127e9a

                      • C:\Users\Admin\hjemmefronter\Synthetase54\Xylophagan\Oddfellowordnerne\myocardium.set

                        Filesize

                        394KB

                        MD5

                        e394eba898e6c64de87228a8e2f86480

                        SHA1

                        56d3342568f90282edcb24da3d79559316d1f181

                        SHA256

                        f2eaac6d269bf7ba5e033a525359ea1865dcb4008f8d320fa1883e90705b74f2

                        SHA512

                        bd99eaf068ac0309ddf6ebfe7862dcd33b5fbb4cb350a7f18791d984600e70978e00348a32e0e8157e8a145eb50c18dd9617684ae3f009932eacdc67ba115413

                      • C:\Users\Admin\hjemmefronter\Synthetase54\Xylophagan\Teleobjective\colleens.txt

                        Filesize

                        370B

                        MD5

                        313a9633a58de00315d4b8a88456dbd4

                        SHA1

                        ac8642ba8fc5ad947be76992b388ba90c1f4f29d

                        SHA256

                        cab61979083d60310c85253bc87b5047a40869b56f1d78885f45556a809f47e8

                        SHA512

                        c274194f91eff6525d039f602bce9294ebfd805ee1382946a3f89fdf6e6c7e315ff50462c54c51a80da97de66c75e2b450d626b28ac31f391c85f9a6de1f87d1

                      • C:\Users\Admin\hjemmefronter\Synthetase54\Xylophagan\Teleobjective\fagkyndige.ini

                        Filesize

                        39B

                        MD5

                        cfc5144c3a75d5f817151ecf6e59b0f3

                        SHA1

                        324399c734ad798dd6f1eead4534f6f9e6bbdd21

                        SHA256

                        e8ec675329b6f0e7223548d4dae4fe8787e077ea654913ab4509d927ad5e0bba

                        SHA512

                        1e91beba4352d45e4a784956c4b2c7cd19f3cc38bece8aa1f0729e4a4b6f334d8b55ff1083bf42c942b7c755740adae4e316654828c4c004bc838671505b2adb

                      • C:\Users\Admin\hjemmefronter\Synthetase54\Xylophagan\blev.sic

                        Filesize

                        321KB

                        MD5

                        2bd23a1fe1db40048da512bea4500417

                        SHA1

                        983f7443e7c4c8a37cc92b06b9aefee6e6bf57b9

                        SHA256

                        f90b84e5e4fad7afcec2a9f9d29fbacde444ff121f6b1801c2dce6748fb05068

                        SHA512

                        e0ce68c81576f52643b59ac448b949617810a62f9b093073304a443d879ab671b006a58c0e50b29197bf053c4d8c01670a3b9efe0d564dd9dd85e160bd281509

                      • C:\Users\Admin\hjemmefronter\Synthetase54\Xylophagan\phaeophyl\noncontestable.sys

                        Filesize

                        356KB

                        MD5

                        1c0e5e3fad38ad4c071145b0c91b1c75

                        SHA1

                        d4332d34c719454b251de7fea2f7ebf74e9ce59f

                        SHA256

                        c9d19087bf0a5cce7b23a791be76d2ed701b7dce69f86baefaa99e7a19fb1567

                        SHA512

                        9b71e0ac39de87e365d87df4052922d545f90e9b899b962459b9f9e5598a19a36ce247e03cc916d76feef53c5a54a6ae7bb8694e08cfa28822a522f2782a6689

                      • C:\Users\Admin\hjemmefronter\Synthetase54\Xylophagan\phaeophyl\opkast.jpg

                        Filesize

                        8KB

                        MD5

                        a798defe4bd96ce304a2b64ba9db9451

                        SHA1

                        ebe61d1bb9f882db6779e125239c94e24fa31ac8

                        SHA256

                        4c4e725a9de497a0171cb912ae1039cf782bdda0791bc15e6960c643f36282b7

                        SHA512

                        6e5b183e0fd717c7f56318f6cb8b2e273c5541d1c0205cb9af317d66a062613c9d5e08d601ed8164c6bb785349482f2406db34254bc886898a165b3608aebd69

                      • C:\Users\Admin\hjemmefronter\Synthetase54\Xylophagan\phaeophyl\wineshop.ini

                        Filesize

                        616B

                        MD5

                        059cb6042549f01a636176876a196d29

                        SHA1

                        434624b61da12f82cd9dd001cf89071e289d6692

                        SHA256

                        c937269a7ddc6b76b73dd9cbd9e64b318665f2c622b00a7ab6e8d0cc31583c2c

                        SHA512

                        6fdd35b9bd2494f7a4831779cf5e55aa7620cc41c08915aca25279dc071f2016e6960c9c50a4d709a64a7b2d01234b11144e82159ad8a671535cade0c66ee208

                      • memory/2052-176-0x0000000000400000-0x000000000047D000-memory.dmp

                        Filesize

                        500KB

                      • memory/2052-177-0x0000000000400000-0x000000000047D000-memory.dmp

                        Filesize

                        500KB

                      • memory/2092-178-0x0000000000400000-0x0000000000462000-memory.dmp

                        Filesize

                        392KB

                      • memory/2092-180-0x0000000000400000-0x0000000000462000-memory.dmp

                        Filesize

                        392KB

                      • memory/2092-183-0x0000000000400000-0x0000000000462000-memory.dmp

                        Filesize

                        392KB

                      • memory/2152-192-0x0000000033E00000-0x0000000033E19000-memory.dmp

                        Filesize

                        100KB

                      • memory/2152-151-0x0000000000460000-0x0000000001777000-memory.dmp

                        Filesize

                        19.1MB

                      • memory/2152-201-0x0000000000460000-0x0000000001777000-memory.dmp

                        Filesize

                        19.1MB

                      • memory/2152-200-0x0000000000460000-0x0000000001777000-memory.dmp

                        Filesize

                        19.1MB

                      • memory/2152-199-0x0000000000460000-0x0000000001777000-memory.dmp

                        Filesize

                        19.1MB

                      • memory/2152-122-0x0000000000460000-0x0000000001777000-memory.dmp

                        Filesize

                        19.1MB

                      • memory/2152-126-0x0000000001780000-0x0000000002F25000-memory.dmp

                        Filesize

                        23.6MB

                      • memory/2152-189-0x0000000033E00000-0x0000000033E19000-memory.dmp

                        Filesize

                        100KB

                      • memory/2152-198-0x0000000000460000-0x0000000001777000-memory.dmp

                        Filesize

                        19.1MB

                      • memory/2152-116-0x0000000001780000-0x0000000002F25000-memory.dmp

                        Filesize

                        23.6MB

                      • memory/2152-197-0x0000000000460000-0x0000000001777000-memory.dmp

                        Filesize

                        19.1MB

                      • memory/2152-196-0x0000000000460000-0x0000000001777000-memory.dmp

                        Filesize

                        19.1MB

                      • memory/2152-195-0x0000000000460000-0x0000000001777000-memory.dmp

                        Filesize

                        19.1MB

                      • memory/2152-194-0x0000000000460000-0x0000000001777000-memory.dmp

                        Filesize

                        19.1MB

                      • memory/2152-193-0x0000000000460000-0x0000000001777000-memory.dmp

                        Filesize

                        19.1MB

                      • memory/2152-191-0x0000000033E00000-0x0000000033E19000-memory.dmp

                        Filesize

                        100KB

                      • memory/2460-17-0x0000000003330000-0x0000000004AD5000-memory.dmp

                        Filesize

                        23.6MB

                      • memory/2460-18-0x00007FF999C81000-0x00007FF999DAA000-memory.dmp

                        Filesize

                        1.2MB

                      • memory/2460-19-0x00007FF999C80000-0x00007FF999E89000-memory.dmp

                        Filesize

                        2.0MB

                      • memory/2460-21-0x0000000003330000-0x0000000004AD5000-memory.dmp

                        Filesize

                        23.6MB

                      • memory/4840-50-0x00007FF999C80000-0x00007FF999E89000-memory.dmp

                        Filesize

                        2.0MB

                      • memory/4840-48-0x0000000000460000-0x0000000001777000-memory.dmp

                        Filesize

                        19.1MB

                      • memory/4840-36-0x0000000001780000-0x0000000002F25000-memory.dmp

                        Filesize

                        23.6MB

                      • memory/4840-32-0x0000000000460000-0x0000000001777000-memory.dmp

                        Filesize

                        19.1MB

                      • memory/4840-31-0x00007FF999C80000-0x00007FF999E89000-memory.dmp

                        Filesize

                        2.0MB

                      • memory/4840-22-0x00007FF999C80000-0x00007FF999E89000-memory.dmp

                        Filesize

                        2.0MB

                      • memory/4856-184-0x0000000000400000-0x0000000000424000-memory.dmp

                        Filesize

                        144KB

                      • memory/4856-185-0x0000000000400000-0x0000000000424000-memory.dmp

                        Filesize

                        144KB

                      • memory/4856-186-0x0000000000400000-0x0000000000424000-memory.dmp

                        Filesize

                        144KB