Analysis

  • max time kernel
    83s
  • max time network
    88s
  • platform
    windows10-1703_x64
  • resource
    win10-20230703-en
  • resource tags

    arch:x64arch:x86image:win10-20230703-enlocale:en-usos:windows10-1703-x64system
  • submitted
    17-07-2023 16:47

General

  • Target

    TeamViewer_Setup.exe

  • Size

    167KB

  • MD5

    e9b22671e6d12b6e916ba894ac226db6

  • SHA1

    81b6798f8f3168d65a114906dc0613bbedb0a51f

  • SHA256

    3ba0993bd95aa81f72ad13fa9cfb2304f715bebe4a486b688d6b1252e8f67d44

  • SHA512

    7d29251d77cbe813d0d414377e8d09438e3d457b12ed9d03898f7fa5c1a3538ff4407bb962ff033a665244b182c828126c62f5f1917155ce81001f9835208b42

  • SSDEEP

    3072:vJZKnPE2YyJzELtyTFyYeY8lNgoiJ+sX8HFvytbCNIR6kqOJTMMz+:vJZKBI0FyYeY4eoiJ+sCFvRSHbz+

Malware Config

Signatures

  • VanillaRat

    VanillaRat is an advanced remote administration tool coded in C#.

  • Vanilla Rat payload 7 IoCs
  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Drops file in System32 directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 8 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies registry class 1 IoCs
  • Modifies registry key 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of FindShellTrayWindow 4 IoCs
  • Suspicious use of SendNotifyMessage 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 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.

Processes

  • C:\Users\Admin\AppData\Local\Temp\TeamViewer_Setup.exe
    "C:\Users\Admin\AppData\Local\Temp\TeamViewer_Setup.exe"
    1⤵
    • Drops file in System32 directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4676
    • C:\Windows\SysWOW64\dllhоst.exe
      "C:\Windows\System32\dllhоst.exe"
      2⤵
      • Executes dropped EXE
      • Drops file in System32 directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1536
      • C:\Windows\SysWOW64\reg.exe
        reg add HKLM\Software\Microsoft\Windows\CurrentVersion\Run /v ChromeUpdate /t REG_SZ /d C:\Windows\SysWOW64\dllhоst.exe /f
        3⤵
        • Adds Run key to start application
        • Modifies registry key
        PID:4460
      • C:\Windows\SysWOW64\сsrss.exe
        "C:\Windows\SysWOW64\сsrss.exe"
        3⤵
        • Executes dropped EXE
        PID:4832
  • C:\Program Files\Mozilla Firefox\firefox.exe
    "C:\Program Files\Mozilla Firefox\firefox.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4560
    • C:\Program Files\Mozilla Firefox\firefox.exe
      "C:\Program Files\Mozilla Firefox\firefox.exe"
      2⤵
      • Checks processor information in registry
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2184
      • C:\Program Files\Mozilla Firefox\firefox.exe
        "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="2184.0.240845610\696378912" -parentBuildID 20221007134813 -prefsHandle 1700 -prefMapHandle 1692 -prefsLen 20936 -prefMapSize 232675 -appDir "C:\Program Files\Mozilla Firefox\browser" - {3eca94cb-232e-4958-b060-a9f28cad04ea} 2184 "\\.\pipe\gecko-crash-server-pipe.2184" 1776 17b6f8d8458 gpu
        3⤵
          PID:220
        • C:\Program Files\Mozilla Firefox\firefox.exe
          "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="2184.1.958827678\1657086103" -parentBuildID 20221007134813 -prefsHandle 2120 -prefMapHandle 2116 -prefsLen 21017 -prefMapSize 232675 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {076552ca-f217-493f-9277-f7f922c89fc7} 2184 "\\.\pipe\gecko-crash-server-pipe.2184" 2132 17b64772e58 socket
          3⤵
          • Checks processor information in registry
          PID:3564
        • C:\Program Files\Mozilla Firefox\firefox.exe
          "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="2184.2.1006300361\1475607004" -childID 1 -isForBrowser -prefsHandle 2908 -prefMapHandle 1576 -prefsLen 21055 -prefMapSize 232675 -jsInitHandle 1336 -jsInitLen 246848 -a11yResourceId 64 -parentBuildID 20221007134813 -appDir "C:\Program Files\Mozilla Firefox\browser" - {40c2282a-d724-4607-8743-1139239361dc} 2184 "\\.\pipe\gecko-crash-server-pipe.2184" 3020 17b73960b58 tab
          3⤵
            PID:336
          • C:\Program Files\Mozilla Firefox\firefox.exe
            "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="2184.3.719610185\386984673" -childID 2 -isForBrowser -prefsHandle 3560 -prefMapHandle 3552 -prefsLen 26480 -prefMapSize 232675 -jsInitHandle 1336 -jsInitLen 246848 -a11yResourceId 64 -parentBuildID 20221007134813 -appDir "C:\Program Files\Mozilla Firefox\browser" - {05e2ff00-f19a-428c-bdd8-4a2bf1263e11} 2184 "\\.\pipe\gecko-crash-server-pipe.2184" 3576 17b64767858 tab
            3⤵
              PID:4916
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="2184.4.413992324\222753296" -childID 3 -isForBrowser -prefsHandle 4196 -prefMapHandle 4192 -prefsLen 26539 -prefMapSize 232675 -jsInitHandle 1336 -jsInitLen 246848 -a11yResourceId 64 -parentBuildID 20221007134813 -appDir "C:\Program Files\Mozilla Firefox\browser" - {57002e6f-57f3-463c-aa4c-067c75cd6af6} 2184 "\\.\pipe\gecko-crash-server-pipe.2184" 4208 17b750e5f58 tab
              3⤵
                PID:2836
              • C:\Program Files\Mozilla Firefox\firefox.exe
                "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="2184.6.100732072\319318919" -childID 5 -isForBrowser -prefsHandle 4932 -prefMapHandle 4936 -prefsLen 26539 -prefMapSize 232675 -jsInitHandle 1336 -jsInitLen 246848 -a11yResourceId 64 -parentBuildID 20221007134813 -appDir "C:\Program Files\Mozilla Firefox\browser" - {c768f18e-1a6b-4010-b149-15695b959db0} 2184 "\\.\pipe\gecko-crash-server-pipe.2184" 4924 17b75d89458 tab
                3⤵
                  PID:4472
                • C:\Program Files\Mozilla Firefox\firefox.exe
                  "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="2184.7.869622646\1949736756" -childID 6 -isForBrowser -prefsHandle 4812 -prefMapHandle 4780 -prefsLen 26539 -prefMapSize 232675 -jsInitHandle 1336 -jsInitLen 246848 -a11yResourceId 64 -parentBuildID 20221007134813 -appDir "C:\Program Files\Mozilla Firefox\browser" - {0914f6d9-a25b-4034-8b6b-2049f175e568} 2184 "\\.\pipe\gecko-crash-server-pipe.2184" 5108 17b75d89a58 tab
                  3⤵
                    PID:3172
                  • C:\Program Files\Mozilla Firefox\firefox.exe
                    "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="2184.5.2028589097\1631743069" -childID 4 -isForBrowser -prefsHandle 4716 -prefMapHandle 4820 -prefsLen 26539 -prefMapSize 232675 -jsInitHandle 1336 -jsInitLen 246848 -a11yResourceId 64 -parentBuildID 20221007134813 -appDir "C:\Program Files\Mozilla Firefox\browser" - {b9f168ac-377c-4064-882e-fb180b7cdbd3} 2184 "\\.\pipe\gecko-crash-server-pipe.2184" 4812 17b75d88b58 tab
                    3⤵
                      PID:2296
                    • C:\Program Files\Mozilla Firefox\firefox.exe
                      "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="2184.8.1125968521\482890440" -childID 7 -isForBrowser -prefsHandle 5512 -prefMapHandle 5508 -prefsLen 26795 -prefMapSize 232675 -jsInitHandle 1336 -jsInitLen 246848 -a11yResourceId 64 -parentBuildID 20221007134813 -appDir "C:\Program Files\Mozilla Firefox\browser" - {9dc2b851-8c08-482a-a7b2-35f8d8d110b3} 2184 "\\.\pipe\gecko-crash-server-pipe.2184" 5484 17b7732e958 tab
                      3⤵
                        PID:2360

                  Network

                  MITRE ATT&CK Enterprise v6

                  Replay Monitor

                  Loading Replay Monitor...

                  Downloads

                  • C:\Users\Admin\AppData\Local\Mozilla\Firefox\Profiles\xcsgzdt0.default-release\activity-stream.discovery_stream.json.tmp

                    Filesize

                    147KB

                    MD5

                    142d2514a6bd810d7f892e7c388e075e

                    SHA1

                    eff7fcb5b9e8bc13f9892981d39006cdafbeb909

                    SHA256

                    d1d3d7e2cce7540fd7621a4aab2a858eabb850f0c882760f25aaab1590e23dd1

                    SHA512

                    40a4b3851abe4940e3acbb04717f933a78883135dfb1eaf58744db683f8327d88ca4434394d1cb5249afc161ad10ba8033df17e0c4f73d3b44646dd8f5cca755

                  • C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\xcsgzdt0.default-release\prefs-1.js

                    Filesize

                    6KB

                    MD5

                    b96198ab6c61a1da5dcb232174313d61

                    SHA1

                    33aadb9b832f64f4effe1de9451267535e9a0c58

                    SHA256

                    e0dfd5ea0370108a3b1e0affd232f3631ea6465e9bf3881e83ff238a03fd081d

                    SHA512

                    33a4ffb7fbac48ad7793e5a093baa03e20ea00d67e4e371c9c066a12afa4c05e31b49ee4f70d72755f25998214e0e298ae7235c9f22019092be4485e7063a6bb

                  • C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\xcsgzdt0.default-release\prefs-1.js

                    Filesize

                    7KB

                    MD5

                    e09393248e436b5a85faff09c8c52c73

                    SHA1

                    7f1d157aead15615c8d14bd4ee748292eac9984b

                    SHA256

                    e4ce50692f75ffb5a47abc3b0b100a0f4522ff12a30bb7053bb7fde15a27320f

                    SHA512

                    516e4add695548f2dedcd180f64bcbd6a521c008e69a1d32f7e89eddc90156221316fcea2f071b29a468c17367821e73c1f1be98bcc483234058e1a4845d1de6

                  • C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\xcsgzdt0.default-release\sessionCheckpoints.json.tmp

                    Filesize

                    259B

                    MD5

                    e6c20f53d6714067f2b49d0e9ba8030e

                    SHA1

                    f516dc1084cdd8302b3e7f7167b905e603b6f04f

                    SHA256

                    50a670fb78ff2712aae2c16d9499e01c15fddf24e229330d02a69b0527a38092

                    SHA512

                    462415b8295c1cdcac0a7cb16bb8a027ef36ae2ce0b061071074ac3209332a7eae71de843af4b96bbbd6158ca8fd5c18147bf9a79b8a7768a9a35edce8b784bf

                  • C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\xcsgzdt0.default-release\sessionstore-backups\recovery.jsonlz4

                    Filesize

                    1KB

                    MD5

                    ad1d29e8a28aa376c96e79c3cacc864c

                    SHA1

                    d250ffe9ac6a353893ed5e103aa4608570c92d49

                    SHA256

                    12d56d8ea85bff54852f934207f09bc2c22144cf844ff7c9befafa44e8611d8e

                    SHA512

                    671d2dd61154e36b85146de97a259320bc0eb0640f2440e9c09ccf02691c9ec342bef58be5f36cd33969f9621b2523684defa35232a3909633352bf088eb1b5c

                  • C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\xcsgzdt0.default-release\sessionstore-backups\recovery.jsonlz4

                    Filesize

                    3KB

                    MD5

                    1219c3023ff236da574be3bed60a5953

                    SHA1

                    7ef48f1da47734efd21d156ae78d82bab7e31112

                    SHA256

                    9e3d2952e85a193f5aac10b3212caecefcf7309accea766523e43751cf9d880f

                    SHA512

                    3686a193e9eb3bee9f0dbb1af064220b6919d4c7506995ff3669aa257cec87a7557e7b595bad14599f6b2fbff60e81b3e8a28cc09b3ee239b338fc6d95302293

                  • C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\xcsgzdt0.default-release\sessionstore.jsonlz4

                    Filesize

                    4KB

                    MD5

                    ae28f11a7b430ea26eb5850e8aae0fdd

                    SHA1

                    7daf0645d9375b504ff9ede37c65b17e9be57711

                    SHA256

                    10840a3e6e61a76679f0fb28f4a009f12be7614121f099422a2b94f56995b135

                    SHA512

                    ee71a67e4f99c6c475a657b4f409357711993445094bf8c99971fe23e1b374009a80060a64e2a3d9b31e3a2c45026ddcdb804fbfe7316ede25e816adf0d8ccea

                  • C:\Windows\SysWOW64\dllhоst.exe

                    Filesize

                    130KB

                    MD5

                    d422f36032337b8996926d750b38fb15

                    SHA1

                    3c469472c5eadd2af6d93d9498e62934149f104d

                    SHA256

                    9c7708aa2255ef6df7faa3eb2821687272ce7e02449419c2fcd5bcde69825a6e

                    SHA512

                    2ba5c12cdc456e437da314759f3d3385179d313ae1118edb3692e2e32759ab3be789b2e086c087ef0ac07c488d860495c99935aed32247b234e5e77f088f3e45

                  • C:\Windows\SysWOW64\dllhоst.exe

                    Filesize

                    130KB

                    MD5

                    d422f36032337b8996926d750b38fb15

                    SHA1

                    3c469472c5eadd2af6d93d9498e62934149f104d

                    SHA256

                    9c7708aa2255ef6df7faa3eb2821687272ce7e02449419c2fcd5bcde69825a6e

                    SHA512

                    2ba5c12cdc456e437da314759f3d3385179d313ae1118edb3692e2e32759ab3be789b2e086c087ef0ac07c488d860495c99935aed32247b234e5e77f088f3e45

                  • C:\Windows\SysWOW64\сsrss.exe

                    Filesize

                    115KB

                    MD5

                    46876588de250f948d185a55b87c7c19

                    SHA1

                    2d098bcc85ff38027797f8a89116dad249afe67d

                    SHA256

                    0206f4977c8992745fcfc19723a473c3a5ed9b92b990271dcfe4edce4e64ebc2

                    SHA512

                    83af7f7a4e7629049fd41185e23d0c4cfba47db7300e4629cc7578dcfb1a403315c7e82b30dded4350e4c38abb942b08e17a1cc3557a2cf0f9ad8e0541e7f943

                  • C:\Windows\SysWOW64\сsrss.exe

                    Filesize

                    115KB

                    MD5

                    46876588de250f948d185a55b87c7c19

                    SHA1

                    2d098bcc85ff38027797f8a89116dad249afe67d

                    SHA256

                    0206f4977c8992745fcfc19723a473c3a5ed9b92b990271dcfe4edce4e64ebc2

                    SHA512

                    83af7f7a4e7629049fd41185e23d0c4cfba47db7300e4629cc7578dcfb1a403315c7e82b30dded4350e4c38abb942b08e17a1cc3557a2cf0f9ad8e0541e7f943

                  • memory/1536-131-0x0000000005060000-0x00000000050FC000-memory.dmp

                    Filesize

                    624KB

                  • memory/1536-132-0x0000000005600000-0x0000000005AFE000-memory.dmp

                    Filesize

                    5.0MB

                  • memory/1536-135-0x0000000002B60000-0x0000000002B6A000-memory.dmp

                    Filesize

                    40KB

                  • memory/1536-134-0x0000000002B40000-0x0000000002B50000-memory.dmp

                    Filesize

                    64KB

                  • memory/1536-136-0x00000000052C0000-0x0000000005316000-memory.dmp

                    Filesize

                    344KB

                  • memory/1536-128-0x0000000000740000-0x0000000000768000-memory.dmp

                    Filesize

                    160KB

                  • memory/1536-130-0x0000000073FB0000-0x000000007469E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/1536-146-0x0000000073FB0000-0x000000007469E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/1536-133-0x0000000005100000-0x0000000005192000-memory.dmp

                    Filesize

                    584KB

                  • memory/4676-121-0x0000000073FB0000-0x000000007469E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/4676-129-0x0000000073FB0000-0x000000007469E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/4676-120-0x0000000000190000-0x00000000001C2000-memory.dmp

                    Filesize

                    200KB

                  • memory/4832-143-0x0000000073FB0000-0x000000007469E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/4832-148-0x00000000057C0000-0x00000000057D0000-memory.dmp

                    Filesize

                    64KB

                  • memory/4832-147-0x0000000073FB0000-0x000000007469E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/4832-145-0x0000000009BF0000-0x0000000009C56000-memory.dmp

                    Filesize

                    408KB

                  • memory/4832-144-0x00000000057C0000-0x00000000057D0000-memory.dmp

                    Filesize

                    64KB

                  • memory/4832-142-0x0000000000D60000-0x0000000000D82000-memory.dmp

                    Filesize

                    136KB