General
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Target
WinOptimizer.18.00.18.Portable.exe
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Size
22.6MB
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Sample
211106-xc9jgsfba5
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MD5
1039e3867fa26e4e38c3a7fafbeb9013
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SHA1
6dc045db152ab59be6e3bb5fa28a3adeea1cb06c
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SHA256
a7521b44c71baaaa5ac4c74b1918196713fee07470a48cbd27b2c46142375154
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SHA512
448ef4504a2202bf0f86fc2a3345d61c53465a96c8a9c6f773475719b1b4e723241bb6bd673b416337891598f910f9e6fc9bf4fe5925bca9981d58550699b45c
Static task
static1
Behavioral task
behavioral1
Sample
CFB1EE668FC3E25580C334AB753749D2EF5A44AB9BE1E033047345827696CBF8.exe
Resource
win7-en-20211014
Malware Config
Extracted
nanocore
1.2.2.0
pettbull.ddns.net:53896
127.0.0.1:53896
5bb33a25-3661-40a6-bf27-e3cf4c873773
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activate_away_mode
false
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backup_connection_host
127.0.0.1
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backup_dns_server
8.8.4.4
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buffer_size
65535
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build_time
2020-12-19T09:35:29.334939436Z
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bypass_user_account_control
true
- bypass_user_account_control_data
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clear_access_control
true
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clear_zone_identifier
false
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connect_delay
4000
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connection_port
53896
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default_group
MIX221
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enable_debug_mode
true
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gc_threshold
1.048576e+07
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keep_alive_timeout
30000
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keyboard_logging
false
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lan_timeout
2500
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max_packet_size
1.048576e+07
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mutex
5bb33a25-3661-40a6-bf27-e3cf4c873773
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mutex_timeout
5000
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prevent_system_sleep
false
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primary_connection_host
pettbull.ddns.net
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primary_dns_server
8.8.8.8
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request_elevation
true
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restart_delay
5000
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run_delay
0
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run_on_startup
false
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set_critical_process
true
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timeout_interval
5000
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use_custom_dns_server
false
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version
1.2.2.0
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wan_timeout
8000
Extracted
asyncrat
0.5.7B
MIXONE
pettbull.ddns.net:6606
pettbull.ddns.net:7707
pettbull.ddns.net:8808
AsyncMutex_6SI8OkPnk
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anti_vm
false
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bsod
false
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delay
3
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install
true
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install_file
Windows Microsoft.exe
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install_folder
%AppData%
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pastebin_config
null
Extracted
quasar
1.4.0
MIX21
pettbull.ddns.net:4782
69383ffd-4823-44c2-b21f-a105f85ed9a0
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encryption_key
DAE9E02E5E04D59D9AF2AA1D5E82248D5919AC6A
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install_name
Windows Service.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
Microsoft Windows
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subdirectory
Windows Update
Targets
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Target
CFB1EE668FC3E25580C334AB753749D2EF5A44AB9BE1E033047345827696CBF8
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Size
22.7MB
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MD5
55287c8aa442a3f521aabb6a80b3f6a8
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SHA1
5e9c38e66448c4c1b8066b04987eb62cf6f48763
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SHA256
cfb1ee668fc3e25580c334ab753749d2ef5a44ab9be1e033047345827696cbf8
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SHA512
2d265bb941c28944ae7a25dea43d6122e04e549d349fc8276670683926feac52b12d3de42b0601d134f3842641b28751a62c8ddc28e3a3140f2041dfdf629813
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Detect Neshta Payload
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Neshta
Malware from the neshta family is designed to infect itself into other files to spread itself and cause damage.
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Quasar Payload
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Async RAT payload
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Executes dropped EXE
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Loads dropped DLL
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Adds Run key to start application
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Checks installed software on the system
Looks up Uninstall key entries in the registry to enumerate software on the system.
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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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Maps connected drives based on registry
Disk information is often read in order to detect sandboxing environments.
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Suspicious use of SetThreadContext
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