General
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Target
utweb_installer.exe
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Size
1.7MB
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Sample
240916-yw8xqsxenb
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MD5
adb84780e2db2c3643975b76ad57bba9
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SHA1
76d1b85e91f0aa8e322669429c1f638dba807b65
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SHA256
52984d792bb0fc6b530a989ef1c8389506fccf669e9a902597c135a42ff201f4
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SHA512
94572f68fba6f085b5936fd0827cb6b3ffaa480d9473e26f87122443743aec797f312e73fe6a827db9e645edef06f8a44a27c09d39f354ccf14485fe242322fe
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SSDEEP
24576:F7FUDowAyrTVE3U5FtFB5xG7wUTgNUYrT0TWmsMFZ2DzcbIZY4:FBuZrEUHB5xmc7Tl7c14
Static task
static1
Behavioral task
behavioral1
Sample
utweb_installer.exe
Resource
win10-20240404-en
Behavioral task
behavioral2
Sample
utweb_installer.exe
Resource
win11-20240802-en
Malware Config
Targets
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Target
utweb_installer.exe
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Size
1.7MB
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MD5
adb84780e2db2c3643975b76ad57bba9
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SHA1
76d1b85e91f0aa8e322669429c1f638dba807b65
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SHA256
52984d792bb0fc6b530a989ef1c8389506fccf669e9a902597c135a42ff201f4
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SHA512
94572f68fba6f085b5936fd0827cb6b3ffaa480d9473e26f87122443743aec797f312e73fe6a827db9e645edef06f8a44a27c09d39f354ccf14485fe242322fe
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SSDEEP
24576:F7FUDowAyrTVE3U5FtFB5xG7wUTgNUYrT0TWmsMFZ2DzcbIZY4:FBuZrEUHB5xmc7Tl7c14
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Cobalt Strike reflective loader
Detects the reflective loader used by Cobalt Strike.
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Contains code to disable Windows Defender
A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.
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Drops file in Drivers directory
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Checks BIOS information in registry
BIOS information is often read in order to detect sandboxing environments.
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Adds Run key to start application
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Checks for any installed AV software in registry
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Downloads MZ/PE file
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Enumerates connected drives
Attempts to read the root path of hard drives other than the default C: drive.
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Modifies powershell logging option
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AutoIT Executable
AutoIT scripts compiled to PE executables.
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Drops file in System32 directory
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MITRE ATT&CK Enterprise v15
Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Defense Evasion
Modify Registry
4Subvert Trust Controls
1Install Root Certificate
1