Analysis

  • max time kernel
    41s
  • max time network
    106s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    17-03-2023 06:28

General

  • Target

    avast_secure_browser_setup.exe

  • Size

    5.8MB

  • MD5

    5386b850641bfc48c53330e873160d0d

  • SHA1

    694ead74714d6a39eeb8226032b02aff3915bae7

  • SHA256

    ac17339c53c46b70cd7786ad38273d8b3ce60ed0e3c6b621cb8b2f14810df26f

  • SHA512

    3432cd1f1553549922b064af38695647a4f0dbc7781a67d037d4721f1c7312edf384f0c452b6bcc4191ed266784a1078eb793ba73926f633a7a794d89f01084d

  • SSDEEP

    98304:natd2zwYrSdKBdUXrfE2P0SG8+twcGXu0xyRq/Hugz7GGemT:n2d2zwYrSdaCbfLJG8+qF7gR//Gey

Malware Config

Signatures

  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 14 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Checks for any installed AV software in registry 1 TTPs 4 IoCs
  • Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • Enumerates physical storage devices 1 TTPs

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

  • Checks SCSI registry key(s) 3 TTPs 1 IoCs

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

  • Modifies system certificate store 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 14 IoCs
  • Suspicious use of SetWindowsHookEx 5 IoCs
  • Suspicious use of WriteProcessMemory 7 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\avast_secure_browser_setup.exe
    "C:\Users\Admin\AppData\Local\Temp\avast_secure_browser_setup.exe"
    1⤵
    • Checks computer location settings
    • Loads dropped DLL
    • Checks for any installed AV software in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2000
    • C:\Users\Admin\AppData\Local\Temp\aj32E7.exe
      "C:\Users\Admin\AppData\Local\Temp\aj32E7.exe" /relaunch=8 /was_elevated=1 /tagdata
      2⤵
      • Checks BIOS information in registry
      • Checks computer location settings
      • Executes dropped EXE
      • Loads dropped DLL
      • Checks for any installed AV software in registry
      • Writes to the Master Boot Record (MBR)
      • Checks SCSI registry key(s)
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      PID:636

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\aj32E7.exe

    Filesize

    5.8MB

    MD5

    8695bee7f56b42160bdfdbc9583e2e5d

    SHA1

    25f2d8339e7fde407d6501f3909f4345c4a6b4bb

    SHA256

    c14417b927c2a571960d418388cdea60b757c3f9ab3c1f8dd681b6aa29eefa07

    SHA512

    92662db658f6552a5c574a74e54d08b1ccf1b1c7c2f025a1e867052b2f86518d625aa2eca19434b0172325c793ad3c50947f7aaa2845749d47ef47e23771e7f0

  • C:\Users\Admin\AppData\Local\Temp\aj32E7.exe

    Filesize

    5.8MB

    MD5

    8695bee7f56b42160bdfdbc9583e2e5d

    SHA1

    25f2d8339e7fde407d6501f3909f4345c4a6b4bb

    SHA256

    c14417b927c2a571960d418388cdea60b757c3f9ab3c1f8dd681b6aa29eefa07

    SHA512

    92662db658f6552a5c574a74e54d08b1ccf1b1c7c2f025a1e867052b2f86518d625aa2eca19434b0172325c793ad3c50947f7aaa2845749d47ef47e23771e7f0

  • C:\Users\Admin\AppData\Local\Temp\avast-securebrowser-web-tags

    Filesize

    22B

    MD5

    1b6886a72f78df90d50cadc94827ace4

    SHA1

    9b542a5c5bc0fc0bb912c07c425ab6f1e7605dff

    SHA256

    789d3f56ba0e6881eed518328ed632ef9cf36527007717fbf64013ceadf17c3d

    SHA512

    c11b84eb6a06db9bdf3f5cc0e2eb311ef68b75ddd88e4005001229591c60e5dcde6066ebd5b0407fd3d27c353200f432b5c91bcee837b5718f75e76213a04bc9

  • C:\Users\Admin\AppData\Local\Temp\nsj1F47.tmp\JsisPlugins.dll

    Filesize

    2.0MB

    MD5

    3f4f65c3551435aa4f70b23db238e027

    SHA1

    10a50d1003a2da42b869527098758bbd0c5a0b93

    SHA256

    3d52f17598297580cc04e8698010d8234b199250803f826fa03031a8f8507e7f

    SHA512

    15b9f0ef917167ed1c3fcbf6235ec277665abb662f26bf338bda2dcc815503b27eab4bfea88f5e4609a40a02f88a87a28d02ca1e4a7575905cb9217b58151a07

  • C:\Users\Admin\AppData\Local\Temp\nsj1F47.tmp\StdUtils.dll

    Filesize

    195KB

    MD5

    13ce1d84ff08bc135a9fb09fe6ce07e4

    SHA1

    4a8baf8c77dfd2975d058cd46ac7751d63819397

    SHA256

    bf42db58fdda71b75d247ecf4b8aad91f80505b96e1c753c3698d2c01d051174

    SHA512

    d59f29794ebb972ef6f4471c8981da5da2f59e5da7f5846ab82d013de043ece156b1ee0598c4227f128a33806bf8831d6f458f9195d63a2996fc24dbc14b4e21

  • C:\Users\Admin\AppData\Local\Temp\nsj1F47.tmp\sciterui.dll

    Filesize

    6.3MB

    MD5

    b9375166489134d10113829db8e2e5fe

    SHA1

    e52955422d111535a35aa0811b95efb12d4681f0

    SHA256

    cb67805b28090d4cc62156078b55be9d9f36a59b88d0aaa94694855979ca3a24

    SHA512

    52c9e54fbae21b43079ffeec4265b7a0fb34e925dade48aac1d195ac7c2d81195371573fc7cec4a00d81ff733dc886a62b796e340cd7c31e6d6757c2250a59c3

  • C:\Users\Admin\AppData\Local\Temp\nst343D.tmp\Midex.dll

    Filesize

    126KB

    MD5

    d73697fed034fa38ae25a64a34e37bde

    SHA1

    577e00018dc33bdf8cec307485745f551fae09bb

    SHA256

    e21d363b60c47e87e7f4dff0ccaa095d190b77ea872514f1bb554c61c82c2546

    SHA512

    aa49eebd731b0218d4e4b48e5dc542f0fc1a1f3962f352687bcacb594f422d904bcd25c04bf72308136365c1955463797bcf883f5917615da912763a6593db4c

  • C:\Users\Admin\AppData\Local\Temp\nst343D.tmp\jsis.dll

    Filesize

    127KB

    MD5

    764e0dc4af6828aac54c96972536d0a4

    SHA1

    cbaa169e875d071731b05fc7fa1ecaf8d5452fb3

    SHA256

    2dfc6b24788ec9004d6daf54597542d387bece8350e64b7d86fbba68dfed4e20

    SHA512

    d86d2a309408c0ee4c1bdc6b8aada93d1203dab07494804188179cb1532b890a4e2c83243c3085ba8f1d17b4b3ee4459ca2983fd49fc5cc1bf704f76e06559e8

  • C:\Users\Admin\AppData\Local\Temp\nst343D.tmp\nsJSON.dll

    Filesize

    36KB

    MD5

    ba032451dc0401e184b4377cf5eea4bc

    SHA1

    9fd9a142ff4d5712ee62f858727b656a5746b39d

    SHA256

    cb104ea43c3eaae04d01846b0324d6f8df1edc82b51319d20bdf0b760cc64c0f

    SHA512

    3d33309ade02a785504566375130a61d862d59e601d40c522a2b54a44e159f5e2421e953a98793c2e5dc0b62355dc20527cc73ed11a43365ce9484ce400ecdcb

  • C:\Users\Admin\AppData\Local\Temp\nst343D.tmp\thirdparty.dll

    Filesize

    93KB

    MD5

    42afe6ceee00468fcc455ae603235863

    SHA1

    bf1dc1b5e8cbd4456cdaa2929f3e188a52ac01fe

    SHA256

    0a7cfcaa9c26ac66b723eb882067ffb1ece1fc8fb188869ffe13acac9101f30f

    SHA512

    86cfcd9ec6c4b461a2bfc52beddc1968cbdad1884dea92d8571d2404bf717011148649cf674939ae37c1d723fdb0214639db90acf3265c225300a194080b4623

  • \Users\Admin\AppData\Local\Temp\aj32E7.exe

    Filesize

    5.8MB

    MD5

    8695bee7f56b42160bdfdbc9583e2e5d

    SHA1

    25f2d8339e7fde407d6501f3909f4345c4a6b4bb

    SHA256

    c14417b927c2a571960d418388cdea60b757c3f9ab3c1f8dd681b6aa29eefa07

    SHA512

    92662db658f6552a5c574a74e54d08b1ccf1b1c7c2f025a1e867052b2f86518d625aa2eca19434b0172325c793ad3c50947f7aaa2845749d47ef47e23771e7f0

  • \Users\Admin\AppData\Local\Temp\nsj1F47.tmp\JsisPlugins.dll

    Filesize

    2.0MB

    MD5

    3f4f65c3551435aa4f70b23db238e027

    SHA1

    10a50d1003a2da42b869527098758bbd0c5a0b93

    SHA256

    3d52f17598297580cc04e8698010d8234b199250803f826fa03031a8f8507e7f

    SHA512

    15b9f0ef917167ed1c3fcbf6235ec277665abb662f26bf338bda2dcc815503b27eab4bfea88f5e4609a40a02f88a87a28d02ca1e4a7575905cb9217b58151a07

  • \Users\Admin\AppData\Local\Temp\nsj1F47.tmp\StdUtils.dll

    Filesize

    195KB

    MD5

    13ce1d84ff08bc135a9fb09fe6ce07e4

    SHA1

    4a8baf8c77dfd2975d058cd46ac7751d63819397

    SHA256

    bf42db58fdda71b75d247ecf4b8aad91f80505b96e1c753c3698d2c01d051174

    SHA512

    d59f29794ebb972ef6f4471c8981da5da2f59e5da7f5846ab82d013de043ece156b1ee0598c4227f128a33806bf8831d6f458f9195d63a2996fc24dbc14b4e21

  • \Users\Admin\AppData\Local\Temp\nsj1F47.tmp\jsis.dll

    Filesize

    127KB

    MD5

    764e0dc4af6828aac54c96972536d0a4

    SHA1

    cbaa169e875d071731b05fc7fa1ecaf8d5452fb3

    SHA256

    2dfc6b24788ec9004d6daf54597542d387bece8350e64b7d86fbba68dfed4e20

    SHA512

    d86d2a309408c0ee4c1bdc6b8aada93d1203dab07494804188179cb1532b890a4e2c83243c3085ba8f1d17b4b3ee4459ca2983fd49fc5cc1bf704f76e06559e8

  • \Users\Admin\AppData\Local\Temp\nsj1F47.tmp\nsJSON.dll

    Filesize

    36KB

    MD5

    ba032451dc0401e184b4377cf5eea4bc

    SHA1

    9fd9a142ff4d5712ee62f858727b656a5746b39d

    SHA256

    cb104ea43c3eaae04d01846b0324d6f8df1edc82b51319d20bdf0b760cc64c0f

    SHA512

    3d33309ade02a785504566375130a61d862d59e601d40c522a2b54a44e159f5e2421e953a98793c2e5dc0b62355dc20527cc73ed11a43365ce9484ce400ecdcb

  • \Users\Admin\AppData\Local\Temp\nsj1F47.tmp\thirdparty.dll

    Filesize

    93KB

    MD5

    42afe6ceee00468fcc455ae603235863

    SHA1

    bf1dc1b5e8cbd4456cdaa2929f3e188a52ac01fe

    SHA256

    0a7cfcaa9c26ac66b723eb882067ffb1ece1fc8fb188869ffe13acac9101f30f

    SHA512

    86cfcd9ec6c4b461a2bfc52beddc1968cbdad1884dea92d8571d2404bf717011148649cf674939ae37c1d723fdb0214639db90acf3265c225300a194080b4623

  • \Users\Admin\AppData\Local\Temp\nst343D.tmp\JsisPlugins.dll

    Filesize

    2.0MB

    MD5

    3f4f65c3551435aa4f70b23db238e027

    SHA1

    10a50d1003a2da42b869527098758bbd0c5a0b93

    SHA256

    3d52f17598297580cc04e8698010d8234b199250803f826fa03031a8f8507e7f

    SHA512

    15b9f0ef917167ed1c3fcbf6235ec277665abb662f26bf338bda2dcc815503b27eab4bfea88f5e4609a40a02f88a87a28d02ca1e4a7575905cb9217b58151a07

  • \Users\Admin\AppData\Local\Temp\nst343D.tmp\Midex.dll

    Filesize

    126KB

    MD5

    d73697fed034fa38ae25a64a34e37bde

    SHA1

    577e00018dc33bdf8cec307485745f551fae09bb

    SHA256

    e21d363b60c47e87e7f4dff0ccaa095d190b77ea872514f1bb554c61c82c2546

    SHA512

    aa49eebd731b0218d4e4b48e5dc542f0fc1a1f3962f352687bcacb594f422d904bcd25c04bf72308136365c1955463797bcf883f5917615da912763a6593db4c

  • \Users\Admin\AppData\Local\Temp\nst343D.tmp\Midex.dll

    Filesize

    126KB

    MD5

    d73697fed034fa38ae25a64a34e37bde

    SHA1

    577e00018dc33bdf8cec307485745f551fae09bb

    SHA256

    e21d363b60c47e87e7f4dff0ccaa095d190b77ea872514f1bb554c61c82c2546

    SHA512

    aa49eebd731b0218d4e4b48e5dc542f0fc1a1f3962f352687bcacb594f422d904bcd25c04bf72308136365c1955463797bcf883f5917615da912763a6593db4c

  • \Users\Admin\AppData\Local\Temp\nst343D.tmp\StdUtils.dll

    Filesize

    195KB

    MD5

    13ce1d84ff08bc135a9fb09fe6ce07e4

    SHA1

    4a8baf8c77dfd2975d058cd46ac7751d63819397

    SHA256

    bf42db58fdda71b75d247ecf4b8aad91f80505b96e1c753c3698d2c01d051174

    SHA512

    d59f29794ebb972ef6f4471c8981da5da2f59e5da7f5846ab82d013de043ece156b1ee0598c4227f128a33806bf8831d6f458f9195d63a2996fc24dbc14b4e21

  • \Users\Admin\AppData\Local\Temp\nst343D.tmp\jsis.dll

    Filesize

    127KB

    MD5

    764e0dc4af6828aac54c96972536d0a4

    SHA1

    cbaa169e875d071731b05fc7fa1ecaf8d5452fb3

    SHA256

    2dfc6b24788ec9004d6daf54597542d387bece8350e64b7d86fbba68dfed4e20

    SHA512

    d86d2a309408c0ee4c1bdc6b8aada93d1203dab07494804188179cb1532b890a4e2c83243c3085ba8f1d17b4b3ee4459ca2983fd49fc5cc1bf704f76e06559e8

  • \Users\Admin\AppData\Local\Temp\nst343D.tmp\nsJSON.dll

    Filesize

    36KB

    MD5

    ba032451dc0401e184b4377cf5eea4bc

    SHA1

    9fd9a142ff4d5712ee62f858727b656a5746b39d

    SHA256

    cb104ea43c3eaae04d01846b0324d6f8df1edc82b51319d20bdf0b760cc64c0f

    SHA512

    3d33309ade02a785504566375130a61d862d59e601d40c522a2b54a44e159f5e2421e953a98793c2e5dc0b62355dc20527cc73ed11a43365ce9484ce400ecdcb

  • \Users\Admin\AppData\Local\Temp\nst343D.tmp\thirdparty.dll

    Filesize

    93KB

    MD5

    42afe6ceee00468fcc455ae603235863

    SHA1

    bf1dc1b5e8cbd4456cdaa2929f3e188a52ac01fe

    SHA256

    0a7cfcaa9c26ac66b723eb882067ffb1ece1fc8fb188869ffe13acac9101f30f

    SHA512

    86cfcd9ec6c4b461a2bfc52beddc1968cbdad1884dea92d8571d2404bf717011148649cf674939ae37c1d723fdb0214639db90acf3265c225300a194080b4623

  • \Users\Admin\AppData\Local\Temp\{03BA3662-D58D-485B-A8AE-B69BC3D145AD}\scrt.dll

    Filesize

    5.7MB

    MD5

    f36f05628b515262db197b15c7065b40

    SHA1

    74a8005379f26dd0de952acab4e3fc5459cde243

    SHA256

    67abd9e211b354fa222e7926c2876c4b3a7aca239c0af47c756ee1b6db6e6d31

    SHA512

    280390b1cf1b6b1e75eaa157adaf89135963d366b48686d48921a654527f9c1505c195ca1fc16dc85b8f13b2994841ca7877a63af708883418a1d588afa3dbe8