Analysis

  • max time kernel
    149s
  • max time network
    160s
  • platform
    windows10-1703_x64
  • resource
    win10-20231215-en
  • resource tags

    arch:x64arch:x86image:win10-20231215-enlocale:en-usos:windows10-1703-x64system
  • submitted
    13-02-2024 18:50

General

  • Target

    win-x64/RandomString.exe

  • Size

    150KB

  • MD5

    4ca71e3cd744303d6f3108f8197cd464

  • SHA1

    f263efc79b5f1b3bb2ddcb25ba085534c5d6f347

  • SHA256

    99f493ce9be5ea02350d1a81ea57f9848e0dfd59fa08fc5a29a9382dcbd5af01

  • SHA512

    09fc2f6a5d9508fbbcc7884e5882413aee204cc1439730a96cd9f483f9d0a48b4de97f22bb8bde3544870ef0ec47f0278a832c353bc5ccc7af1958dfe5e0a15f

  • SSDEEP

    3072:NDj9lTcDWfoj+uD9diMkJoZggTgYFzYrwLNsL1W:NDTojL6Ed0Y8wBM1

Score
7/10

Malware Config

Signatures

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Drops file in Windows directory 4 IoCs
  • Modifies Internet Explorer settings 1 TTPs 2 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: MapViewOfSection 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\win-x64\RandomString.exe
    "C:\Users\Admin\AppData\Local\Temp\win-x64\RandomString.exe"
    1⤵
    • Checks computer location settings
    PID:2172
  • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdge.exe
    "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdge.exe" -ServerName:MicrosoftEdge.AppXdnhjhccw3zf0j06tkg3jtqr00qdm0khc.mca
    1⤵
    • Drops file in Windows directory
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:1544
  • C:\Windows\system32\browser_broker.exe
    C:\Windows\system32\browser_broker.exe -Embedding
    1⤵
    • Modifies Internet Explorer settings
    PID:4636
  • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
    "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
    1⤵
    • Modifies registry class
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4980
  • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
    "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
    1⤵
    • Drops file in Windows directory
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    PID:980
  • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
    "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
    1⤵
    • Drops file in Windows directory
    • Modifies registry class
    PID:4820
  • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
    "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
    1⤵
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    PID:800
  • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
    "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
    1⤵
    • Modifies registry class
    PID:1780
  • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
    "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
    1⤵
    • Modifies registry class
    PID:4208

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\57C8EDB95DF3F0AD4EE2DC2B8CFD4157

    Filesize

    4KB

    MD5

    1bfe591a4fe3d91b03cdf26eaacd8f89

    SHA1

    719c37c320f518ac168c86723724891950911cea

    SHA256

    9cf94355051bf0f4a45724ca20d1cc02f76371b963ab7d1e38bd8997737b13d8

    SHA512

    02f88da4b610678c31664609bcfa9d61db8d0b0617649981af948f670f41a6207b4ec19fecce7385a24e0c609cbbf3f2b79a8acaf09a03c2c432cc4dce75e9db

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\6OMHFB77\edgecompatviewlist[1].xml

    Filesize

    74KB

    MD5

    d4fc49dc14f63895d997fa4940f24378

    SHA1

    3efb1437a7c5e46034147cbbc8db017c69d02c31

    SHA256

    853d2f4eb81c9fdcea2ee079f6faf98214b111b77cdf68709b38989d123890f1

    SHA512

    cc60d79b4afe5007634ac21dc4bc92081880be4c0d798a1735b63b27e936c02f399964f744dc73711987f01e8a1064b02a4867dd6cac27538e5fbe275cc61e0a

  • C:\Users\Admin\AppData\Local\Packages\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\AC\#!001\MicrosoftEdge\User\Default\DOMStore\02B1N0A2\dotnet.microsoft[1].xml

    Filesize

    84B

    MD5

    dc6d883662fb05f8dda57dcb338fecb6

    SHA1

    7f51fb3d8bd7e32de6ddeea640e8b802cee43a35

    SHA256

    4636ca7c22b5427eacb6fb5107a3684f98fbfe608b6eb924e2214bf53793cd26

    SHA512

    922f75bc8093ee2183224e00b9e9b6315084308e2cadb1e619998007a7d5b1c0bb3df844a6b88bb2477e04e00dfd12e02e6838f95453d8102efc6ee3fbeea7a5

  • C:\Users\Admin\AppData\Local\Packages\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\AC\#!001\MicrosoftEdge\User\Default\DOMStore\02B1N0A2\dotnet.microsoft[1].xml

    Filesize

    387B

    MD5

    7b72f602580b4e520b8c9d07106ff3fc

    SHA1

    43d19c9caba3d5f53f7ecb6098a9d81b356689dc

    SHA256

    7b3665cacf4b1c3c7c9a1fbecf528677ff7b7900d07c6caaa628fdbc225b5ce4

    SHA512

    fe6f226d6050332afb4ec29c4f7497da40e3899256b5af2e7bdcb79022ea50765ea1b5568276b0ee08eaaa0ab472777801ad0f4eb202bb4d6a1696b4efa4f152

  • C:\Users\Admin\AppData\Local\Packages\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\AC\MicrosoftEdge\Cache\F1E6UWDD\suggestions[1].en-US

    Filesize

    17KB

    MD5

    5a34cb996293fde2cb7a4ac89587393a

    SHA1

    3c96c993500690d1a77873cd62bc639b3a10653f

    SHA256

    c6a5377cbc07eece33790cfc70572e12c7a48ad8296be25c0cc805a1f384dbad

    SHA512

    e1b7d0107733f81937415104e70f68b1be6fd0ca65dccf4ff72637943d44278d3a77f704aedff59d2dbc0d56a609b2590c8ec0dd6bc48ab30f1dad0c07a0a3ee

  • C:\Users\Admin\AppData\Local\Packages\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\AC\MicrosoftEdge\Cache\RLXE03GR\favicon[1].ico

    Filesize

    161KB

    MD5

    8565042b6db20c23647202bf4b95f11b

    SHA1

    9f0829cb3ceef14ac10e0b66338d8b7243a09101

    SHA256

    dd7958526f6b8510fc2a9a675056d78e029e62015e8913dda574ff5797ddb969

    SHA512

    dbf692b7219a3ea993ab939442a843ffbc7bcfe63bc62117a14ed7e953ffce595393e9f950649aa609a7a9a94b56003ab84cb82edaf2db3e4551434204085b95

  • C:\Users\Admin\AppData\Local\Packages\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\AC\MicrosoftEdge\User\Default\ImageStore\h6h3r5q\imagestore.dat

    Filesize

    64KB

    MD5

    e59de0183eba60e882dc9be31cb04638

    SHA1

    a9f4a494846962e1d83ffcbb95c29dc85469241a

    SHA256

    92c39463f355d355bc39a1bbde46ea0a6f08e6e41bec99f96fbfb39d080505af

    SHA512

    dbf7ef791e5dda69506e6f315d17e4874aedbb3254f2a8da7670f896718c223335dfd36f02c3970abd86e35abb7bbc23cf8ee38a9849e4cedfe1a534c52d112d

  • memory/1544-16-0x00000215FC7E0000-0x00000215FC7F0000-memory.dmp

    Filesize

    64KB

  • memory/1544-35-0x00000215FC980000-0x00000215FC982000-memory.dmp

    Filesize

    8KB

  • memory/1544-0-0x00000215FC520000-0x00000215FC530000-memory.dmp

    Filesize

    64KB

  • memory/1544-253-0x0000021584EF0000-0x0000021584EF1000-memory.dmp

    Filesize

    4KB

  • memory/1544-252-0x0000021584EE0000-0x0000021584EE1000-memory.dmp

    Filesize

    4KB

  • memory/4820-140-0x0000020A273E0000-0x0000020A273E2000-memory.dmp

    Filesize

    8KB

  • memory/4820-275-0x0000020A28100000-0x0000020A28200000-memory.dmp

    Filesize

    1024KB

  • memory/4820-186-0x0000020A27ED0000-0x0000020A27ED2000-memory.dmp

    Filesize

    8KB

  • memory/4820-187-0x0000020A28100000-0x0000020A28200000-memory.dmp

    Filesize

    1024KB

  • memory/4820-193-0x0000020A28100000-0x0000020A28200000-memory.dmp

    Filesize

    1024KB

  • memory/4820-209-0x0000020A22960000-0x0000020A22980000-memory.dmp

    Filesize

    128KB

  • memory/4820-171-0x0000020A27920000-0x0000020A27922000-memory.dmp

    Filesize

    8KB

  • memory/4820-169-0x0000020A22AC0000-0x0000020A22AE0000-memory.dmp

    Filesize

    128KB

  • memory/4820-165-0x0000020A278E0000-0x0000020A278E2000-memory.dmp

    Filesize

    8KB

  • memory/4820-157-0x0000020A27650000-0x0000020A27652000-memory.dmp

    Filesize

    8KB

  • memory/4820-134-0x0000020A273A0000-0x0000020A273A2000-memory.dmp

    Filesize

    8KB

  • memory/4820-177-0x0000020A22920000-0x0000020A22940000-memory.dmp

    Filesize

    128KB

  • memory/4820-127-0x0000020A231E0000-0x0000020A231E2000-memory.dmp

    Filesize

    8KB

  • memory/4820-311-0x0000020A28800000-0x0000020A28900000-memory.dmp

    Filesize

    1024KB

  • memory/4820-313-0x0000020A28320000-0x0000020A28340000-memory.dmp

    Filesize

    128KB

  • memory/4820-322-0x0000020A29400000-0x0000020A29500000-memory.dmp

    Filesize

    1024KB

  • memory/4820-353-0x0000020A29180000-0x0000020A29182000-memory.dmp

    Filesize

    8KB

  • memory/4820-356-0x0000020A291A0000-0x0000020A291A2000-memory.dmp

    Filesize

    8KB

  • memory/4820-63-0x0000020A11410000-0x0000020A11412000-memory.dmp

    Filesize

    8KB

  • memory/4820-61-0x0000020A113D0000-0x0000020A113D2000-memory.dmp

    Filesize

    8KB

  • memory/4820-58-0x0000020A11390000-0x0000020A11392000-memory.dmp

    Filesize

    8KB