Analysis
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max time kernel
146s -
max time network
141s -
platform
windows7_x64 -
resource
win7 -
submitted
29-06-2020 07:27
Static task
static1
Behavioral task
behavioral1
Sample
b51cbad37376d459dcb4e24b04578a0f4f3b081feb2fb8a7bb1341a9dcc0815f.exe
Resource
win7
General
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Target
b51cbad37376d459dcb4e24b04578a0f4f3b081feb2fb8a7bb1341a9dcc0815f.exe
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Size
369KB
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MD5
3cf7fcf808b6a1e2864fd53578e0b0c6
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SHA1
73ca48fd744cc84a66b8844a441b84a85e473182
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SHA256
b51cbad37376d459dcb4e24b04578a0f4f3b081feb2fb8a7bb1341a9dcc0815f
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SHA512
fe06f00a7aedef1a22e8691094654dbe0770eb6f8a39b23bbe76422a361c173efa1bf91d63968d6fc12574b6b047057f7abc1d920e1aa16f73684996f31ef605
Malware Config
Extracted
nanocore
1.2.2.0
185.244.30.139:2121
annapro55.ddns.net:2121
912d38da-67db-490c-9c4c-4b7c843ca9fd
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activate_away_mode
true
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backup_connection_host
annapro55.ddns.net
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backup_dns_server
8.8.4.4
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buffer_size
65535
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build_time
2020-03-27T00:27:31.421536436Z
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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
true
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connect_delay
4000
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connection_port
2121
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default_group
NEW CLIENTS
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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
-
lan_timeout
2500
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max_packet_size
1.048576e+07
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mutex
912d38da-67db-490c-9c4c-4b7c843ca9fd
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mutex_timeout
5000
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prevent_system_sleep
true
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primary_connection_host
185.244.30.139
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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
true
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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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Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
MSBuild.exepid process 1640 MSBuild.exe -
Processes:
MSBuild.exedescription ioc process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA MSBuild.exe -
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious use of WriteProcessMemory 13 IoCs
Processes:
b51cbad37376d459dcb4e24b04578a0f4f3b081feb2fb8a7bb1341a9dcc0815f.exedescription pid process target process PID 1104 wrote to memory of 1420 1104 b51cbad37376d459dcb4e24b04578a0f4f3b081feb2fb8a7bb1341a9dcc0815f.exe schtasks.exe PID 1104 wrote to memory of 1420 1104 b51cbad37376d459dcb4e24b04578a0f4f3b081feb2fb8a7bb1341a9dcc0815f.exe schtasks.exe PID 1104 wrote to memory of 1420 1104 b51cbad37376d459dcb4e24b04578a0f4f3b081feb2fb8a7bb1341a9dcc0815f.exe schtasks.exe PID 1104 wrote to memory of 1420 1104 b51cbad37376d459dcb4e24b04578a0f4f3b081feb2fb8a7bb1341a9dcc0815f.exe schtasks.exe PID 1104 wrote to memory of 1640 1104 b51cbad37376d459dcb4e24b04578a0f4f3b081feb2fb8a7bb1341a9dcc0815f.exe MSBuild.exe PID 1104 wrote to memory of 1640 1104 b51cbad37376d459dcb4e24b04578a0f4f3b081feb2fb8a7bb1341a9dcc0815f.exe MSBuild.exe PID 1104 wrote to memory of 1640 1104 b51cbad37376d459dcb4e24b04578a0f4f3b081feb2fb8a7bb1341a9dcc0815f.exe MSBuild.exe PID 1104 wrote to memory of 1640 1104 b51cbad37376d459dcb4e24b04578a0f4f3b081feb2fb8a7bb1341a9dcc0815f.exe MSBuild.exe PID 1104 wrote to memory of 1640 1104 b51cbad37376d459dcb4e24b04578a0f4f3b081feb2fb8a7bb1341a9dcc0815f.exe MSBuild.exe PID 1104 wrote to memory of 1640 1104 b51cbad37376d459dcb4e24b04578a0f4f3b081feb2fb8a7bb1341a9dcc0815f.exe MSBuild.exe PID 1104 wrote to memory of 1640 1104 b51cbad37376d459dcb4e24b04578a0f4f3b081feb2fb8a7bb1341a9dcc0815f.exe MSBuild.exe PID 1104 wrote to memory of 1640 1104 b51cbad37376d459dcb4e24b04578a0f4f3b081feb2fb8a7bb1341a9dcc0815f.exe MSBuild.exe PID 1104 wrote to memory of 1640 1104 b51cbad37376d459dcb4e24b04578a0f4f3b081feb2fb8a7bb1341a9dcc0815f.exe MSBuild.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
b51cbad37376d459dcb4e24b04578a0f4f3b081feb2fb8a7bb1341a9dcc0815f.exedescription pid process target process PID 1104 set thread context of 1640 1104 b51cbad37376d459dcb4e24b04578a0f4f3b081feb2fb8a7bb1341a9dcc0815f.exe MSBuild.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
b51cbad37376d459dcb4e24b04578a0f4f3b081feb2fb8a7bb1341a9dcc0815f.exeMSBuild.exedescription pid process Token: SeDebugPrivilege 1104 b51cbad37376d459dcb4e24b04578a0f4f3b081feb2fb8a7bb1341a9dcc0815f.exe Token: SeDebugPrivilege 1640 MSBuild.exe -
Suspicious behavior: EnumeratesProcesses 3 IoCs
Processes:
b51cbad37376d459dcb4e24b04578a0f4f3b081feb2fb8a7bb1341a9dcc0815f.exeMSBuild.exepid process 1104 b51cbad37376d459dcb4e24b04578a0f4f3b081feb2fb8a7bb1341a9dcc0815f.exe 1640 MSBuild.exe 1640 MSBuild.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\b51cbad37376d459dcb4e24b04578a0f4f3b081feb2fb8a7bb1341a9dcc0815f.exe"C:\Users\Admin\AppData\Local\Temp\b51cbad37376d459dcb4e24b04578a0f4f3b081feb2fb8a7bb1341a9dcc0815f.exe"1⤵
- Suspicious use of WriteProcessMemory
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious behavior: EnumeratesProcesses
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\xXhdhlVLYiH" /XML "C:\Users\Admin\AppData\Local\Temp\tmp88FD.tmp"2⤵
- Creates scheduled task(s)
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C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe"{path}"2⤵
- Suspicious behavior: GetForegroundWindowSpam
- Checks whether UAC is enabled
- Suspicious use of AdjustPrivilegeToken
- Suspicious behavior: EnumeratesProcesses
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\tmp88FD.tmp
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memory/1420-0-0x0000000000000000-mapping.dmp
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memory/1640-2-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/1640-3-0x000000000041E792-mapping.dmp
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memory/1640-4-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/1640-5-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB