Analysis
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max time kernel
150s -
max time network
143s -
platform
windows7_x64 -
resource
win7-20220414-en -
submitted
21-05-2022 18:42
Static task
static1
Behavioral task
behavioral1
Sample
00008442786.exe
Resource
win7-20220414-en
General
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Target
00008442786.exe
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Size
1.3MB
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MD5
b979af7040bd69e7f91b3b4de4e4c3ff
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SHA1
eeb5e20cf6258c68c9be89dc81683f5bf57a3380
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SHA256
5e09510e834b75413af64e013eda43df867fab6080facf4227a08ca64861a244
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SHA512
fdb5a12cbb102f355619761942a28e7b31e9a26ded8fc1cacdd3437d6ccc182e11eb795bdfd472746a968a1ee9be824c5cc44541eb2f51ba1fa68a6ee745e31b
Malware Config
Extracted
nanocore
1.2.2.0
185.140.53.12:1985
127.0.0.1:1985
1b68869e-dd8c-4eea-829f-d7272a505d3a
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activate_away_mode
true
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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
2020-01-17T10:03:49.054089636Z
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bypass_user_account_control
true
- bypass_user_account_control_data
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clear_access_control
false
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clear_zone_identifier
false
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connect_delay
4000
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connection_port
1985
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default_group
kdott
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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
1b68869e-dd8c-4eea-829f-d7272a505d3a
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mutex_timeout
5000
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prevent_system_sleep
true
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primary_connection_host
185.140.53.12
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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
Signatures
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Drops startup file 1 IoCs
Processes:
00008442786.exedescription ioc process File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\quickassist.url 00008442786.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
MSBuild.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\DSL Service = "C:\\Program Files (x86)\\DSL Service\\dslsvc.exe" MSBuild.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
00008442786.exedescription pid process target process PID 1672 set thread context of 1924 1672 00008442786.exe MSBuild.exe -
Drops file in Program Files directory 2 IoCs
Processes:
MSBuild.exedescription ioc process File created C:\Program Files (x86)\DSL Service\dslsvc.exe MSBuild.exe File opened for modification C:\Program Files (x86)\DSL Service\dslsvc.exe MSBuild.exe -
Suspicious behavior: EnumeratesProcesses 16 IoCs
Processes:
MSBuild.exe00008442786.exepid process 1924 MSBuild.exe 1924 MSBuild.exe 1672 00008442786.exe 1672 00008442786.exe 1672 00008442786.exe 1672 00008442786.exe 1672 00008442786.exe 1672 00008442786.exe 1672 00008442786.exe 1672 00008442786.exe 1672 00008442786.exe 1672 00008442786.exe 1672 00008442786.exe 1672 00008442786.exe 1672 00008442786.exe 1672 00008442786.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
MSBuild.exepid process 1924 MSBuild.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
MSBuild.exedescription pid process Token: SeDebugPrivilege 1924 MSBuild.exe -
Suspicious use of FindShellTrayWindow 3 IoCs
Processes:
00008442786.exepid process 1672 00008442786.exe 1672 00008442786.exe 1672 00008442786.exe -
Suspicious use of SendNotifyMessage 3 IoCs
Processes:
00008442786.exepid process 1672 00008442786.exe 1672 00008442786.exe 1672 00008442786.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
00008442786.exedescription pid process target process PID 1672 wrote to memory of 1924 1672 00008442786.exe MSBuild.exe PID 1672 wrote to memory of 1924 1672 00008442786.exe MSBuild.exe PID 1672 wrote to memory of 1924 1672 00008442786.exe MSBuild.exe PID 1672 wrote to memory of 1924 1672 00008442786.exe MSBuild.exe PID 1672 wrote to memory of 1924 1672 00008442786.exe MSBuild.exe PID 1672 wrote to memory of 1924 1672 00008442786.exe MSBuild.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\00008442786.exe"C:\Users\Admin\AppData\Local\Temp\00008442786.exe"1⤵
- Drops startup file
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe"C:\\\\Windows\\\\Microsoft.NET\\\\Framework\\\\v2.0.50727\\\\MSBuild.exe"2⤵
- Adds Run key to start application
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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memory/1672-54-0x0000000075B61000-0x0000000075B63000-memory.dmpFilesize
8KB
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memory/1672-66-0x0000000002720000-0x0000000002786000-memory.dmpFilesize
408KB
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memory/1672-67-0x0000000002650000-0x00000000026B6000-memory.dmpFilesize
408KB
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memory/1924-55-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/1924-57-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/1924-62-0x000000000041E792-mapping.dmp
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memory/1924-63-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/1924-64-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/1924-68-0x0000000074880000-0x0000000074E2B000-memory.dmpFilesize
5.7MB