Analysis
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max time kernel
101s -
max time network
152s -
platform
windows7_x64 -
resource
win7-20220812-en -
resource tags
arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system -
submitted
24-10-2022 03:26
Static task
static1
Behavioral task
behavioral1
Sample
HEALTHCARE PO 00134536OCT2422.exe
Resource
win7-20220812-en
General
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Target
HEALTHCARE PO 00134536OCT2422.exe
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Size
816KB
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MD5
09b2235e9a54194838d29a8e92d3d120
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SHA1
93d2d74e32e4995f30e038287c5d229264c837fc
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SHA256
74bf4be5cd674b82ed1eee10d1187d16b8abd1c348d2527d8ff34d88fbc01114
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SHA512
676fdc32a922ee410d34c1fa65c17bd5584c82b4e2d7d9e315115a592a4d8a2e8ad3472452dc5916159ecaa7223d28595b648145e5c6a8f481e95132fc8b4e22
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SSDEEP
6144:l7BRdX63JgEWqAi2iu8ifmZzBa34IDz3Dv+Xr3Di0OlqMuyP2X7+tCfUktC0w5T3:zX6Zglqk7WYPfLYr5GeL+kfRX4nYY9
Malware Config
Extracted
nanocore
1.2.2.0
198.50.231.134:5498
9b971056-14d1-4d11-993c-89c2085bbd7c
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activate_away_mode
true
- backup_connection_host
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backup_dns_server
8.8.4.4
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buffer_size
65535
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build_time
2022-07-01T11:22:25.531243736Z
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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
5498
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default_group
miracle
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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
9b971056-14d1-4d11-993c-89c2085bbd7c
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mutex_timeout
5000
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prevent_system_sleep
true
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primary_connection_host
198.50.231.134
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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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Processes:
HEALTHCARE PO 00134536OCT2422.exedescription ioc process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA HEALTHCARE PO 00134536OCT2422.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
HEALTHCARE PO 00134536OCT2422.exedescription pid process target process PID 1964 set thread context of 1768 1964 HEALTHCARE PO 00134536OCT2422.exe HEALTHCARE PO 00134536OCT2422.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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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 behavior: EnumeratesProcesses 11 IoCs
Processes:
HEALTHCARE PO 00134536OCT2422.exepowershell.exeHEALTHCARE PO 00134536OCT2422.exepid process 1964 HEALTHCARE PO 00134536OCT2422.exe 1964 HEALTHCARE PO 00134536OCT2422.exe 1964 HEALTHCARE PO 00134536OCT2422.exe 1964 HEALTHCARE PO 00134536OCT2422.exe 1964 HEALTHCARE PO 00134536OCT2422.exe 1964 HEALTHCARE PO 00134536OCT2422.exe 1700 powershell.exe 1768 HEALTHCARE PO 00134536OCT2422.exe 1768 HEALTHCARE PO 00134536OCT2422.exe 1768 HEALTHCARE PO 00134536OCT2422.exe 1768 HEALTHCARE PO 00134536OCT2422.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
HEALTHCARE PO 00134536OCT2422.exepid process 1768 HEALTHCARE PO 00134536OCT2422.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
HEALTHCARE PO 00134536OCT2422.exepowershell.exeHEALTHCARE PO 00134536OCT2422.exedescription pid process Token: SeDebugPrivilege 1964 HEALTHCARE PO 00134536OCT2422.exe Token: SeDebugPrivilege 1700 powershell.exe Token: SeDebugPrivilege 1768 HEALTHCARE PO 00134536OCT2422.exe -
Suspicious use of WriteProcessMemory 17 IoCs
Processes:
HEALTHCARE PO 00134536OCT2422.exedescription pid process target process PID 1964 wrote to memory of 1700 1964 HEALTHCARE PO 00134536OCT2422.exe powershell.exe PID 1964 wrote to memory of 1700 1964 HEALTHCARE PO 00134536OCT2422.exe powershell.exe PID 1964 wrote to memory of 1700 1964 HEALTHCARE PO 00134536OCT2422.exe powershell.exe PID 1964 wrote to memory of 1700 1964 HEALTHCARE PO 00134536OCT2422.exe powershell.exe PID 1964 wrote to memory of 1320 1964 HEALTHCARE PO 00134536OCT2422.exe schtasks.exe PID 1964 wrote to memory of 1320 1964 HEALTHCARE PO 00134536OCT2422.exe schtasks.exe PID 1964 wrote to memory of 1320 1964 HEALTHCARE PO 00134536OCT2422.exe schtasks.exe PID 1964 wrote to memory of 1320 1964 HEALTHCARE PO 00134536OCT2422.exe schtasks.exe PID 1964 wrote to memory of 1768 1964 HEALTHCARE PO 00134536OCT2422.exe HEALTHCARE PO 00134536OCT2422.exe PID 1964 wrote to memory of 1768 1964 HEALTHCARE PO 00134536OCT2422.exe HEALTHCARE PO 00134536OCT2422.exe PID 1964 wrote to memory of 1768 1964 HEALTHCARE PO 00134536OCT2422.exe HEALTHCARE PO 00134536OCT2422.exe PID 1964 wrote to memory of 1768 1964 HEALTHCARE PO 00134536OCT2422.exe HEALTHCARE PO 00134536OCT2422.exe PID 1964 wrote to memory of 1768 1964 HEALTHCARE PO 00134536OCT2422.exe HEALTHCARE PO 00134536OCT2422.exe PID 1964 wrote to memory of 1768 1964 HEALTHCARE PO 00134536OCT2422.exe HEALTHCARE PO 00134536OCT2422.exe PID 1964 wrote to memory of 1768 1964 HEALTHCARE PO 00134536OCT2422.exe HEALTHCARE PO 00134536OCT2422.exe PID 1964 wrote to memory of 1768 1964 HEALTHCARE PO 00134536OCT2422.exe HEALTHCARE PO 00134536OCT2422.exe PID 1964 wrote to memory of 1768 1964 HEALTHCARE PO 00134536OCT2422.exe HEALTHCARE PO 00134536OCT2422.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\HEALTHCARE PO 00134536OCT2422.exe"C:\Users\Admin\AppData\Local\Temp\HEALTHCARE PO 00134536OCT2422.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1964 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\ESrTlJCU.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1700
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ESrTlJCU" /XML "C:\Users\Admin\AppData\Local\Temp\tmpCE77.tmp"2⤵
- Creates scheduled task(s)
PID:1320
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C:\Users\Admin\AppData\Local\Temp\HEALTHCARE PO 00134536OCT2422.exe"C:\Users\Admin\AppData\Local\Temp\HEALTHCARE PO 00134536OCT2422.exe"2⤵
- Checks whether UAC is enabled
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
PID:1768
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
1KB
MD5b0b190b1f56535b848c00bc26b9a7d4c
SHA1a7d726dbfe3aa9d40bc3e9ecb81d608ffca46267
SHA25612f29cc70fc19b6d71e28cd8184a6b12bc4ff0e2b13408a82dca6a4c3b63822a
SHA512c7257fb1cbeba635a677c68fcf9ba5f3a4367c6d7c0b3abdd6703503e5450df2c1c375c6bd434a59628461bab3cf6f80e1a76db7581fc35278826548cd2a52ab