Resubmissions

18/04/2024, 06:27

240418-g75wsafa3x 10

18/04/2024, 06:22

240418-g4ynaseh5v 1

Analysis

  • max time kernel
    129s
  • max time network
    130s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-es
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-eslocale:es-esos:windows10-2004-x64systemwindows
  • submitted
    18/04/2024, 06:27

General

  • Target

    https://docs.google.com/uc?export=download&id=1Pfa__kpg_oLasDz_3xXEkfJBhr5qPe1H

Malware Config

Extracted

Family

remcos

Botnet

FELIZ

C2

abril16.con-ip.com:7770

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-QNIVJE

  • 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.

  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies data under HKEY_USERS 2 IoCs
  • Modifies registry class 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 34 IoCs
  • Suspicious use of SendNotifyMessage 24 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe" --disable-background-networking --disable-component-update --simulate-outdated-no-au='Tue, 31 Dec 2099 23:59:59 GMT' --single-argument https://docs.google.com/uc?export=download&id=1Pfa__kpg_oLasDz_3xXEkfJBhr5qPe1H
    1⤵
    • Enumerates system info in registry
    • Modifies data under HKEY_USERS
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:4236
    • 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:7 --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=110.0.5481.104 --initial-client-data=0xfc,0x100,0x104,0xd8,0x108,0x7ff9c268ab58,0x7ff9c268ab68,0x7ff9c268ab78
      2⤵
        PID:1520
      • C:\Program Files\Google\Chrome\Application\chrome.exe
        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --gpu-preferences=UAAAAAAAAADgAAAYAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAEgAAAAAAAAASAAAAAAAAAAYAAAAAgAAABAAAAAAAAAAGAAAAAAAAAAQAAAAAAAAAAAAAAAOAAAAEAAAAAAAAAABAAAADgAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=1708 --field-trial-handle=1868,i,1096172131488560668,8321704973847719274,131072 /prefetch:2
        2⤵
          PID:2336
        • 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 --mojo-platform-channel-handle=2128 --field-trial-handle=1868,i,1096172131488560668,8321704973847719274,131072 /prefetch:8
          2⤵
            PID:1340
          • 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 --mojo-platform-channel-handle=2240 --field-trial-handle=1868,i,1096172131488560668,8321704973847719274,131072 /prefetch:8
            2⤵
              PID:1640
            • C:\Program Files\Google\Chrome\Application\chrome.exe
              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --enable-chrome-cart --first-renderer-process --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --mojo-platform-channel-handle=2872 --field-trial-handle=1868,i,1096172131488560668,8321704973847719274,131072 /prefetch:1
              2⤵
                PID:3252
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --enable-chrome-cart --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --mojo-platform-channel-handle=2888 --field-trial-handle=1868,i,1096172131488560668,8321704973847719274,131072 /prefetch:1
                2⤵
                  PID:3868
                • 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 --mojo-platform-channel-handle=4588 --field-trial-handle=1868,i,1096172131488560668,8321704973847719274,131072 /prefetch:8
                  2⤵
                    PID:860
                  • C:\Program Files\Google\Chrome\Application\chrome.exe
                    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=4824 --field-trial-handle=1868,i,1096172131488560668,8321704973847719274,131072 /prefetch:8
                    2⤵
                      PID:4212
                    • C:\Program Files\Google\Chrome\Application\chrome.exe
                      "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=quarantine.mojom.Quarantine --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=4904 --field-trial-handle=1868,i,1096172131488560668,8321704973847719274,131072 /prefetch:8
                      2⤵
                        PID:5072
                      • C:\Program Files\Google\Chrome\Application\chrome.exe
                        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=4892 --field-trial-handle=1868,i,1096172131488560668,8321704973847719274,131072 /prefetch:8
                        2⤵
                          PID:1932
                        • C:\Program Files\Google\Chrome\Application\chrome.exe
                          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=4824 --field-trial-handle=1868,i,1096172131488560668,8321704973847719274,131072 /prefetch:8
                          2⤵
                            PID:1564
                          • C:\Program Files\Google\Chrome\Application\chrome.exe
                            "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5028 --field-trial-handle=1868,i,1096172131488560668,8321704973847719274,131072 /prefetch:8
                            2⤵
                              PID:392
                            • C:\Program Files\Google\Chrome\Application\chrome.exe
                              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --disable-gpu-sandbox --use-gl=disabled --gpu-vendor-id=4318 --gpu-device-id=140 --gpu-sub-system-id=0 --gpu-revision=0 --gpu-driver-version=10.0.19041.546 --gpu-preferences=UAAAAAAAAADoAAAYAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAACQAAAAAAAAAAAAAAAAAAAAAAAAAEgAAAAAAAAASAAAAAAAAAAYAAAAAgAAABAAAAAAAAAAGAAAAAAAAAAQAAAAAAAAAAAAAAAOAAAAEAAAAAAAAAABAAAADgAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=4392 --field-trial-handle=1868,i,1096172131488560668,8321704973847719274,131072 /prefetch:2
                              2⤵
                              • Suspicious behavior: EnumeratesProcesses
                              PID:4828
                          • C:\Program Files\Google\Chrome\Application\110.0.5481.104\elevation_service.exe
                            "C:\Program Files\Google\Chrome\Application\110.0.5481.104\elevation_service.exe"
                            1⤵
                              PID:3184
                            • C:\Windows\System32\rundll32.exe
                              C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
                              1⤵
                                PID:1456
                              • C:\Windows\system32\OpenWith.exe
                                C:\Windows\system32\OpenWith.exe -Embedding
                                1⤵
                                • Modifies registry class
                                • Suspicious use of SetWindowsHookEx
                                PID:5104
                              • C:\Program Files\7-Zip\7zG.exe
                                "C:\Program Files\7-Zip\7zG.exe" x -o"C:\Users\Admin\Downloads\NOTIFICACIÓN DEL FALLO; RAD.7653890012-2024\" -spe -an -ai#7zMap336:148:7zEvent24057
                                1⤵
                                • Suspicious use of AdjustPrivilegeToken
                                • Suspicious use of FindShellTrayWindow
                                PID:1200
                              • C:\Users\Admin\Downloads\NOTIFICACIÓN DEL FALLO; RAD.7653890012-2024\NOTIFICACIÓN DEL FALLO; RAD.7653890012-2024..exe
                                "C:\Users\Admin\Downloads\NOTIFICACIÓN DEL FALLO; RAD.7653890012-2024\NOTIFICACIÓN DEL FALLO; RAD.7653890012-2024..exe"
                                1⤵
                                • Executes dropped EXE
                                • Adds Run key to start application
                                • Suspicious use of NtCreateThreadExHideFromDebugger
                                PID:4760
                                • C:\Users\Admin\Downloads\NOTIFICACIÓN DEL FALLO; RAD.7653890012-2024\NOTIFICACIÓN DEL FALLO; RAD.7653890012-2024..exe
                                  "C:\Users\Admin\Downloads\NOTIFICACIÓN DEL FALLO; RAD.7653890012-2024\NOTIFICACIÓN DEL FALLO; RAD.7653890012-2024..exe"
                                  2⤵
                                  • Executes dropped EXE
                                  • Suspicious behavior: GetForegroundWindowSpam
                                  • Suspicious use of SetWindowsHookEx
                                  PID:4324

                              Network

                              MITRE ATT&CK Enterprise v15

                              Replay Monitor

                              Loading Replay Monitor...

                              Downloads

                              • C:\ProgramData\remcos\logs.dat

                                Filesize

                                200B

                                MD5

                                518e6463086cdcd77f6f0364107bfb8e

                                SHA1

                                c1eb88b7e9f5aeefa9dbae9a50e10fa70dc4935b

                                SHA256

                                c802a90a7668ee807c3c4eeb077d3a686aee4509687b093f41f8ffd095a25ecc

                                SHA512

                                cee68b2ee4f72381847b64e0f09641dfdc6905135001f751e5d86c927e2687db8504f2a083c73f47812a113a0815473410180e7fd5e39ff4616e94ca480a2de5

                              • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\Network Persistent State

                                Filesize

                                1KB

                                MD5

                                090efd64b3bb9b24f26b2b8bf07ace0e

                                SHA1

                                06bb3915db5800e739f1580620821461981c0021

                                SHA256

                                dc20445493678ae8741560735f25426b850fb237b506b47dcde59473a46651d5

                                SHA512

                                eaa55269d99b7bf83f6f83ab28dec9162e15973fe80e90bd4194b51d621a430a24a116d1653b1548eaa408b8138e04e71a362dcb3d69617b0f92362317912648

                              • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\Network Persistent State

                                Filesize

                                1KB

                                MD5

                                10f6628bff9cf3377d0d5bad2b36baeb

                                SHA1

                                b9a7f4d3f03f9ee996a6140a2f89eae542c5b29c

                                SHA256

                                4b75ed59aa580feb54c517ff6500c97d7d89d7841f8497b10b471e7c5923ae0b

                                SHA512

                                edc530fd815200b6fdc3d6d5219bac2360f52d9712504b64fae92ec77ea55931d87e71de67dc50097920cb53b6975b9626a74b0dbb6ffd4347acecd87ddb12ef

                              • 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\Google\Chrome\User Data\Default\Network\TransportSecurity

                                Filesize

                                522B

                                MD5

                                14260e1ee1021f6e105489928b982869

                                SHA1

                                fe36c31cf6f784fd72475945dc480af1315d683d

                                SHA256

                                6cb6fa5f85ab5d305fbf51d67f2cd8962248d1ed9ba36143be041ab94953e244

                                SHA512

                                3b95a5bfb164dd4a7c7347483c06974c24d217a999f462f6d941db3e7531c001f9dd40c56b8781dfba8e7171b975017eb773d9a8c7afb0874e1f5d97d162af32

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

                                Filesize

                                6KB

                                MD5

                                68186d3fefa45fbddbad89bc51cd773e

                                SHA1

                                a32e71c1c6b66392341ffb380a41b1360d9c74af

                                SHA256

                                bb1bedb01651280ac46035f8a7446610aaefb41d653720f4e6571dc8fff97dd5

                                SHA512

                                8271aba560dc2d2dd278e19cad9d19628f5ea262a7480f5e137889e59206329ea48fb74e4e47f0588b7d5998b71a281f939e0f6871bba6e491eeab47f22714b3

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

                                Filesize

                                252KB

                                MD5

                                9bdc00a84fd39d85c3c28a6049331a58

                                SHA1

                                dc4eb191caa45b5a7ecb8a81fd8a4489a690749e

                                SHA256

                                57f435f6a015da71f3df8154c4995095907852f0117f9858bf1f499f8cd128d3

                                SHA512

                                ab07b3020caece574ea7587cacb2b9465393da4f4d79bbc0c8b24114fff5d4221688574f01bc9a269395cfadc84f1b850b867a46d7135ca27fb8b5dbd106b40d

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

                                Filesize

                                252KB

                                MD5

                                2d0cdf474cd53e574bc037971dae0432

                                SHA1

                                9af946acbdc1fa4f7c36a4aa6e3dc3bf4cc32293

                                SHA256

                                5242b6937ddf1e0d17c47fe8a289ca972f1afe554b19cd3a1b6cdc63654823a4

                                SHA512

                                866ea0ea9ea9b29aecc9ad7c81c1c32014ce81f089310d94d2bcbcb579e2f07b2e088502b6bfe54dbf2126b4bedac701ef22e7d567d0e6f67524820d64b17308

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

                                Filesize

                                252KB

                                MD5

                                b949839010c008dd28fb1305bd60ab85

                                SHA1

                                4399da5dfa75b52d213867bd6a177dfcd44774a2

                                SHA256

                                8d122e44d9b1d60c9fbdf05de011120eddfc915554819c28999817d7c1e1616f

                                SHA512

                                c9a22f49a8f7cf37f7ee1cc3778fa98706b5f4016bfbc48585247dc2e2c75b608bcf310127784b0933f9959619dee7e1a4bd524f84d023c32d9bbf2af6ee9a9d

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

                                Filesize

                                292KB

                                MD5

                                f50b7f17a226d225363b037507869af7

                                SHA1

                                a1175fe35e35caf4413a934641775b323501256b

                                SHA256

                                6edc47eda9e72c98afac0ab71877f8f98fab98a1f1ffd43ec3a629782e4975dc

                                SHA512

                                0c8e82e4bda0de0e5de7217e976cfcbe8081148ccc33f4f95b6baf82d3a7e1cd7c3475e153a845d506ba7fc9f23b8a160cbc2b8e268393c95c08f5e5a3cd46bd

                              • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Module Info Cache

                                Filesize

                                103KB

                                MD5

                                931fc8a4f0b54a56d5c03a6f92cc8727

                                SHA1

                                724b6e842a240f4db390cbd2d2a3dd9ae1434a12

                                SHA256

                                48f4d9aaacc40c97eb8a97a0a81a0d0b669377a698cbf5d0c34a9093e3ef053c

                                SHA512

                                d623a3d887d82e1de96a45133ffab3fca8ab45cb3a0a5154fd38da488c86a533840eaaad167ce8d1f277e6354d0c57b1ceed1ede2200cf943faca0547316525c

                              • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Module Info Cache~RFe57e714.TMP

                                Filesize

                                99KB

                                MD5

                                6905df3f10113e5b2a58d3c07f9a897f

                                SHA1

                                b96712441f1cb58ce99ce46b035263c02fa5aa27

                                SHA256

                                983093bec28ea0e99bb4c83265876d4ec16a30693f12ebf31d4ef8f468c8d097

                                SHA512

                                a9b5c1ba48748ca4d38eaf42bee06f67dcc24ed798c9ea17d5459b9eba868fbf927ed00608a54664e82f76962465073222370eb2ace7487d74f23f5d201e0cb7

                              • C:\Users\Admin\Downloads\NOTIFICACIÓN DEL FALLO; RAD.7653890012-2024.tar.crdownload

                                Filesize

                                2.0MB

                                MD5

                                14e97c831d3eb18a5fe6a708e7b70d0f

                                SHA1

                                634cfebdabf6fe48ceb2701728055fcf8f3794fe

                                SHA256

                                43599f53d07c79582db46154043054eeb2b447602b71a6501d8db203783febe7

                                SHA512

                                7819e277acb5bd4e98af1ddd0ae4e82bd6259df1b797853fb8ba7f260d9d3051d58bede5d5df49ed8e1035f353ca364861ee4ad8be5aa040928cfb45a8716787

                              • C:\Users\Admin\Downloads\NOTIFICACIÓN DEL FALLO; RAD.7653890012-2024\NOTIFICACIÓN DEL FALLO; RAD.7653890012-2024..exe

                                Filesize

                                5.6MB

                                MD5

                                f9b72e996ccc1c986f2468db04b4a400

                                SHA1

                                3e14d328e245b47d461cec8d0638089d078f084e

                                SHA256

                                5bd63bb82d4fd00638c75bff15500e8c4a9b08dff87d092a1c3933726a2f834e

                                SHA512

                                c24bac019024583c5db59dde31fc4ea2f098597c3eb1353fc2c8640bab889d6bc06dc72e6146124444798ec82e9c80d2e70eca0c4e6399c5fc625d8a3233084b

                              • memory/4324-122-0x00000000009A0000-0x0000000000A22000-memory.dmp

                                Filesize

                                520KB

                              • memory/4324-111-0x00000000001D0000-0x00000000001D1000-memory.dmp

                                Filesize

                                4KB

                              • memory/4324-114-0x00000000009A0000-0x0000000000A22000-memory.dmp

                                Filesize

                                520KB

                              • memory/4324-116-0x00000000009A0000-0x0000000000A22000-memory.dmp

                                Filesize

                                520KB

                              • memory/4324-118-0x00000000009A0000-0x0000000000A22000-memory.dmp

                                Filesize

                                520KB

                              • memory/4324-119-0x00000000009A0000-0x0000000000A22000-memory.dmp

                                Filesize

                                520KB

                              • memory/4324-171-0x00000000009A0000-0x0000000000A22000-memory.dmp

                                Filesize

                                520KB

                              • memory/4324-121-0x00000000009A0000-0x0000000000A22000-memory.dmp

                                Filesize

                                520KB

                              • memory/4324-123-0x00000000009A0000-0x0000000000A22000-memory.dmp

                                Filesize

                                520KB

                              • memory/4324-170-0x00000000009A0000-0x0000000000A22000-memory.dmp

                                Filesize

                                520KB

                              • memory/4324-165-0x00000000009A0000-0x0000000000A22000-memory.dmp

                                Filesize

                                520KB

                              • memory/4324-164-0x00000000009A0000-0x0000000000A22000-memory.dmp

                                Filesize

                                520KB

                              • memory/4760-109-0x0000000000400000-0x0000000000998000-memory.dmp

                                Filesize

                                5.6MB

                              • memory/4760-110-0x0000000000400000-0x0000000000998000-memory.dmp

                                Filesize

                                5.6MB

                              • memory/4760-108-0x0000000000400000-0x0000000000998000-memory.dmp

                                Filesize

                                5.6MB

                              • memory/4760-115-0x0000000000400000-0x0000000000998000-memory.dmp

                                Filesize

                                5.6MB

                              • memory/4760-107-0x0000000000400000-0x0000000000998000-memory.dmp

                                Filesize

                                5.6MB