Overview

overview

7

Static

static

1

avast_secu...up.exe

windows10-1703-x64

7

Analysis

  • max time kernel
    71s
  • max time network
    131s
  • platform
    windows10-1703_x64
  • resource
    win10-20230220-en
  • resource tags

    arch:x64arch:x86image:win10-20230220-enlocale:en-usos:windows10-1703-x64system
  • submitted
    07-04-2023 15:42

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General

  • Target

    avast_secure_browser_setup.exe

  • Size

    5.8MB

  • MD5

    22c33dcfe60539a919a706412469c9ff

  • SHA1

    871be24183f5c368c17f366bcbed244bf069787e

  • SHA256

    f467bbbee3c2082bbac7badb990cd7490fb1cf8eeb91c5d11f98876e0fa66815

  • SHA512

    2c48decacc96c1fce5ebe60c47853791a8098975843f6a256fe5a3555a82c2a5eff9b6478c97ebad4569f8390d306d1edd894d103bb46ad12bb87d1be602b4ab

  • SSDEEP

    98304:0xGy2FazvN6a6L3U9YwRwWE85whIRlJ9YI7qgoZAhaq2+mvayOMWBM:0wfFazvAa6bUaWw785whI9YR9AhOzC5C

Score
7/10
bootkitpersistencespywarestealer

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 13 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

    spywarestealer
  • 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.

    bootkitpersistence
  • 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 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of SetWindowsHookEx 5 IoCs
  • Suspicious use of WriteProcessMemory 3 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:3944
    • C:\Users\Admin\AppData\Local\Temp\aj6CFA.exe
      "C:\Users\Admin\AppData\Local\Temp\aj6CFA.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)
      PID:4788

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\aj6CFA.exe
    Filesize

    5.8MB

    MD5

    5aa7ef11ae6c8e25d985f0eb58c71dc8

    SHA1

    4b9b0638961eb76cb5c70ebefaf135438fae18da

    SHA256

    bc58bbb4d972ee14416619ab8505e90385620776bd25cdc89f24e44982a978a6

    SHA512

    2c2ce7d9bb3eae65d5407090dcb2f6602bc0705993b4d2b649ae5b74aa43d56e501fa48a1abb20b0501356cfea7524d9ea93806d9a576439c90a0e5a2378fbe2

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  • C:\Users\Admin\AppData\Local\Temp\aj6CFA.exe
    Filesize

    5.8MB

    MD5

    5aa7ef11ae6c8e25d985f0eb58c71dc8

    SHA1

    4b9b0638961eb76cb5c70ebefaf135438fae18da

    SHA256

    bc58bbb4d972ee14416619ab8505e90385620776bd25cdc89f24e44982a978a6

    SHA512

    2c2ce7d9bb3eae65d5407090dcb2f6602bc0705993b4d2b649ae5b74aa43d56e501fa48a1abb20b0501356cfea7524d9ea93806d9a576439c90a0e5a2378fbe2

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

    22B

    MD5

    dbe13341f51fc1e34375fc0d8b5d1107

    SHA1

    0af40c935a03162174f045ad1b097a369b32f913

    SHA256

    af37ffa23875f25b22b074a5aebb980cccd84f565ce9511918c6ecdf00f9808e

    SHA512

    3b0b59790d7c190e7ef4a96d06e463bd610b57b88ee3ff076e52f19976e8029a87e369682f437f92a4a2fa8df00c91c66a2d1f4e43fb5c1bbae067556443c35d

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  • C:\Users\Admin\AppData\Local\Temp\nse6028.tmp\sciterui.dll
    Filesize

    6.3MB

    MD5

    b9375166489134d10113829db8e2e5fe

    SHA1

    e52955422d111535a35aa0811b95efb12d4681f0

    SHA256

    cb67805b28090d4cc62156078b55be9d9f36a59b88d0aaa94694855979ca3a24

    SHA512

    52c9e54fbae21b43079ffeec4265b7a0fb34e925dade48aac1d195ac7c2d81195371573fc7cec4a00d81ff733dc886a62b796e340cd7c31e6d6757c2250a59c3

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  • C:\Users\Admin\AppData\Local\Temp\nsg71BC.tmp\JsisPlugins.dll
    Filesize

    2.0MB

    MD5

    3f4f65c3551435aa4f70b23db238e027

    SHA1

    10a50d1003a2da42b869527098758bbd0c5a0b93

    SHA256

    3d52f17598297580cc04e8698010d8234b199250803f826fa03031a8f8507e7f

    SHA512

    15b9f0ef917167ed1c3fcbf6235ec277665abb662f26bf338bda2dcc815503b27eab4bfea88f5e4609a40a02f88a87a28d02ca1e4a7575905cb9217b58151a07

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  • C:\Users\Admin\AppData\Local\Temp\nsg71BC.tmp\Midex.dll
    Filesize

    126KB

    MD5

    66e8b98ef43de94b138a3833000057fc

    SHA1

    2396fb82b3f02978b670deb7860244f044f3781f

    SHA256

    b4c71bd2fc6ad06b577f27d8f53bb105ab691b00b6e7b4e5bfde3f517269e456

    SHA512

    f4653af12abe46d42f0d71480bf3537606b27e978bba53f9f5708013980469bec5e5e802beba60551b8f577beca1f519564e927190a669bf67e25daa0e06804a

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  • C:\Users\Admin\AppData\Local\Temp\nsg71BC.tmp\StdUtils.dll
    Filesize

    195KB

    MD5

    d8c7c459bb94182f2ed21c414ad32f93

    SHA1

    919f3c16e31d566fc14f25e1cf2335444ce9f8c4

    SHA256

    3afc0e86a5cea9bee44033360188fc90f51344b18937b884af91a86dc2142d51

    SHA512

    b484e7a2804019ca85bded10a9abf265ef2e291bd09d555e27519d07b6cd324b6532b005ab9504a54739f31012b269a7d433d30d629c0517cde8f31c214aa74e

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  • C:\Users\Admin\AppData\Local\Temp\nsg71BC.tmp\jsis.dll
    Filesize

    127KB

    MD5

    e370ba29cd649d4553491ac95be1e45a

    SHA1

    4b299e8c31c3efe7b0b094d539eaaa8061f4ef63

    SHA256

    b6f9a6ffb9d1ccc04657c1628671806e08c1b11dbb63a3809d2cbb8c5596cf39

    SHA512

    c26a2d41ac847d1549aa94ff62b7d26951d26bbea8e153d6fc020abaf64c90cf05ba7ca2b622573a41b59e9cff0b7f876c0a3d002ec22973874e07485a1a48af

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  • C:\Users\Admin\AppData\Local\Temp\nsg71BC.tmp\nsJSON.dll
    Filesize

    36KB

    MD5

    ed88f3bee80858dd43c4eab27b59db0e

    SHA1

    c40f8ee78e84883ba0593f852ff7ecbe83f4c31a

    SHA256

    cbfe28a6bff5230fb433430dd8e99db13144033754d8f1885394adff6b3e02a4

    SHA512

    d844f8a7ffa0cc4c7ae0bafbf2b242013edc55df187300b68985811fd2499acbda6bba765641c9889bf92f3d2b686e804c13869911c6089668db706b81f17ee4

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  • C:\Users\Admin\AppData\Local\Temp\nsg71BC.tmp\thirdparty.dll
    Filesize

    93KB

    MD5

    1d8305828b1be38c43cb344fcfa7611f

    SHA1

    5104565bed0ab3e0135708589f100901d8db7baa

    SHA256

    a3f5f64bfab79a1357b2b9acc807182168495c6d87ce2086fae4f36e53c7f337

    SHA512

    6eded302bd240006e593ff1d8cb8bf660a6a09d0163b11eea9128d66c47aa00aa8641ddd03d41c7c4ba8b6be9f37d16600587e001e7e3f74a54f133c80445d75

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  • \Users\Admin\AppData\Local\Temp\nse6028.tmp\JsisPlugins.dll
    Filesize

    2.0MB

    MD5

    3f4f65c3551435aa4f70b23db238e027

    SHA1

    10a50d1003a2da42b869527098758bbd0c5a0b93

    SHA256

    3d52f17598297580cc04e8698010d8234b199250803f826fa03031a8f8507e7f

    SHA512

    15b9f0ef917167ed1c3fcbf6235ec277665abb662f26bf338bda2dcc815503b27eab4bfea88f5e4609a40a02f88a87a28d02ca1e4a7575905cb9217b58151a07

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  • \Users\Admin\AppData\Local\Temp\nse6028.tmp\StdUtils.dll
    Filesize

    195KB

    MD5

    d8c7c459bb94182f2ed21c414ad32f93

    SHA1

    919f3c16e31d566fc14f25e1cf2335444ce9f8c4

    SHA256

    3afc0e86a5cea9bee44033360188fc90f51344b18937b884af91a86dc2142d51

    SHA512

    b484e7a2804019ca85bded10a9abf265ef2e291bd09d555e27519d07b6cd324b6532b005ab9504a54739f31012b269a7d433d30d629c0517cde8f31c214aa74e

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  • \Users\Admin\AppData\Local\Temp\nse6028.tmp\jsis.dll
    Filesize

    127KB

    MD5

    e370ba29cd649d4553491ac95be1e45a

    SHA1

    4b299e8c31c3efe7b0b094d539eaaa8061f4ef63

    SHA256

    b6f9a6ffb9d1ccc04657c1628671806e08c1b11dbb63a3809d2cbb8c5596cf39

    SHA512

    c26a2d41ac847d1549aa94ff62b7d26951d26bbea8e153d6fc020abaf64c90cf05ba7ca2b622573a41b59e9cff0b7f876c0a3d002ec22973874e07485a1a48af

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  • \Users\Admin\AppData\Local\Temp\nse6028.tmp\nsJSON.dll
    Filesize

    36KB

    MD5

    ed88f3bee80858dd43c4eab27b59db0e

    SHA1

    c40f8ee78e84883ba0593f852ff7ecbe83f4c31a

    SHA256

    cbfe28a6bff5230fb433430dd8e99db13144033754d8f1885394adff6b3e02a4

    SHA512

    d844f8a7ffa0cc4c7ae0bafbf2b242013edc55df187300b68985811fd2499acbda6bba765641c9889bf92f3d2b686e804c13869911c6089668db706b81f17ee4

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  • \Users\Admin\AppData\Local\Temp\nse6028.tmp\thirdparty.dll
    Filesize

    93KB

    MD5

    1d8305828b1be38c43cb344fcfa7611f

    SHA1

    5104565bed0ab3e0135708589f100901d8db7baa

    SHA256

    a3f5f64bfab79a1357b2b9acc807182168495c6d87ce2086fae4f36e53c7f337

    SHA512

    6eded302bd240006e593ff1d8cb8bf660a6a09d0163b11eea9128d66c47aa00aa8641ddd03d41c7c4ba8b6be9f37d16600587e001e7e3f74a54f133c80445d75

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  • \Users\Admin\AppData\Local\Temp\nsg71BC.tmp\JsisPlugins.dll
    Filesize

    2.0MB

    MD5

    3f4f65c3551435aa4f70b23db238e027

    SHA1

    10a50d1003a2da42b869527098758bbd0c5a0b93

    SHA256

    3d52f17598297580cc04e8698010d8234b199250803f826fa03031a8f8507e7f

    SHA512

    15b9f0ef917167ed1c3fcbf6235ec277665abb662f26bf338bda2dcc815503b27eab4bfea88f5e4609a40a02f88a87a28d02ca1e4a7575905cb9217b58151a07

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  • \Users\Admin\AppData\Local\Temp\nsg71BC.tmp\Midex.dll
    Filesize

    126KB

    MD5

    66e8b98ef43de94b138a3833000057fc

    SHA1

    2396fb82b3f02978b670deb7860244f044f3781f

    SHA256

    b4c71bd2fc6ad06b577f27d8f53bb105ab691b00b6e7b4e5bfde3f517269e456

    SHA512

    f4653af12abe46d42f0d71480bf3537606b27e978bba53f9f5708013980469bec5e5e802beba60551b8f577beca1f519564e927190a669bf67e25daa0e06804a

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  • \Users\Admin\AppData\Local\Temp\nsg71BC.tmp\Midex.dll
    Filesize

    126KB

    MD5

    66e8b98ef43de94b138a3833000057fc

    SHA1

    2396fb82b3f02978b670deb7860244f044f3781f

    SHA256

    b4c71bd2fc6ad06b577f27d8f53bb105ab691b00b6e7b4e5bfde3f517269e456

    SHA512

    f4653af12abe46d42f0d71480bf3537606b27e978bba53f9f5708013980469bec5e5e802beba60551b8f577beca1f519564e927190a669bf67e25daa0e06804a

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  • \Users\Admin\AppData\Local\Temp\nsg71BC.tmp\StdUtils.dll
    Filesize

    195KB

    MD5

    d8c7c459bb94182f2ed21c414ad32f93

    SHA1

    919f3c16e31d566fc14f25e1cf2335444ce9f8c4

    SHA256

    3afc0e86a5cea9bee44033360188fc90f51344b18937b884af91a86dc2142d51

    SHA512

    b484e7a2804019ca85bded10a9abf265ef2e291bd09d555e27519d07b6cd324b6532b005ab9504a54739f31012b269a7d433d30d629c0517cde8f31c214aa74e

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  • \Users\Admin\AppData\Local\Temp\nsg71BC.tmp\jsis.dll
    Filesize

    127KB

    MD5

    e370ba29cd649d4553491ac95be1e45a

    SHA1

    4b299e8c31c3efe7b0b094d539eaaa8061f4ef63

    SHA256

    b6f9a6ffb9d1ccc04657c1628671806e08c1b11dbb63a3809d2cbb8c5596cf39

    SHA512

    c26a2d41ac847d1549aa94ff62b7d26951d26bbea8e153d6fc020abaf64c90cf05ba7ca2b622573a41b59e9cff0b7f876c0a3d002ec22973874e07485a1a48af

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  • \Users\Admin\AppData\Local\Temp\nsg71BC.tmp\nsJSON.dll
    Filesize

    36KB

    MD5

    ed88f3bee80858dd43c4eab27b59db0e

    SHA1

    c40f8ee78e84883ba0593f852ff7ecbe83f4c31a

    SHA256

    cbfe28a6bff5230fb433430dd8e99db13144033754d8f1885394adff6b3e02a4

    SHA512

    d844f8a7ffa0cc4c7ae0bafbf2b242013edc55df187300b68985811fd2499acbda6bba765641c9889bf92f3d2b686e804c13869911c6089668db706b81f17ee4

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  • \Users\Admin\AppData\Local\Temp\nsg71BC.tmp\thirdparty.dll
    Filesize

    93KB

    MD5

    1d8305828b1be38c43cb344fcfa7611f

    SHA1

    5104565bed0ab3e0135708589f100901d8db7baa

    SHA256

    a3f5f64bfab79a1357b2b9acc807182168495c6d87ce2086fae4f36e53c7f337

    SHA512

    6eded302bd240006e593ff1d8cb8bf660a6a09d0163b11eea9128d66c47aa00aa8641ddd03d41c7c4ba8b6be9f37d16600587e001e7e3f74a54f133c80445d75

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  • \Users\Admin\AppData\Local\Temp\{51E051C3-D947-43DC-B2FE-3A6F366A92C0}\scrt.dll
    Filesize

    5.7MB

    MD5

    f36f05628b515262db197b15c7065b40

    SHA1

    74a8005379f26dd0de952acab4e3fc5459cde243

    SHA256

    67abd9e211b354fa222e7926c2876c4b3a7aca239c0af47c756ee1b6db6e6d31

    SHA512

    280390b1cf1b6b1e75eaa157adaf89135963d366b48686d48921a654527f9c1505c195ca1fc16dc85b8f13b2994841ca7877a63af708883418a1d588afa3dbe8

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