Analysis
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max time kernel
142s -
max time network
150s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system -
submitted
29-09-2024 02:06
Static task
static1
Behavioral task
behavioral1
Sample
b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exe
Resource
win7-20240903-en
General
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Target
b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exe
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Size
1.1MB
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MD5
52a2331fa9f5ed6370a425a6b90d3ce8
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SHA1
25725ba60399ecbe61e27e34beb89026f7141467
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SHA256
b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e
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SHA512
39e800d6fe0306c6757aebf162e3109d1ebb85ffd27dcaa94165f3487b8d5c5ad02bb6d3fbf87b4ceac561346bdc891650183a5e7ff52cf06959ebfeeb7b0fa8
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SSDEEP
24576:1AHnh+eWsN3skA4RV1Hom2KXMmHahZB/Nep86f3YAm4W5D:kh+ZkldoPK8Yahb/NKKAm9D
Malware Config
Extracted
nanocore
1.2.2.0
160.202.163.242:6765
c0a66e70-712e-4e13-85d0-5362a812b1a5
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activate_away_mode
true
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backup_connection_host
160.202.163.242
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backup_dns_server
8.8.4.4
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buffer_size
65535
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build_time
2019-02-24T16:03:16.653191036Z
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bypass_user_account_control
false
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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
6765
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default_group
Default
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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
c0a66e70-712e-4e13-85d0-5362a812b1a5
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mutex_timeout
5000
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prevent_system_sleep
false
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primary_connection_host
160.202.163.242
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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:
b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exedescription ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\VsGraphicsDesktopEngine.lnk b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
RegAsm.exedescription ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\DOS Manager = "C:\\Program Files (x86)\\DOS Manager\\dosmgr.exe" RegAsm.exe -
Processes:
RegAsm.exedescription ioc Process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA RegAsm.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exedescription pid Process procid_target PID 2104 set thread context of 2820 2104 b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exe 29 -
Drops file in Program Files directory 2 IoCs
Processes:
RegAsm.exedescription ioc Process File created C:\Program Files (x86)\DOS Manager\dosmgr.exe RegAsm.exe File opened for modification C:\Program Files (x86)\DOS Manager\dosmgr.exe RegAsm.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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System Location Discovery: System Language Discovery 1 TTPs 4 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
Processes:
b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exeRegAsm.exeschtasks.exeschtasks.exedescription ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language RegAsm.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language schtasks.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language schtasks.exe -
Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
Processes:
schtasks.exeschtasks.exepid Process 2640 schtasks.exe 1708 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 13 IoCs
Processes:
RegAsm.exeb703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exepid Process 2820 RegAsm.exe 2820 RegAsm.exe 2820 RegAsm.exe 2104 b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exe 2104 b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exe 2104 b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exe 2104 b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exe 2104 b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exe 2104 b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exe 2104 b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exe 2104 b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exe 2104 b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exe 2104 b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
RegAsm.exepid Process 2820 RegAsm.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
RegAsm.exedescription pid Process Token: SeDebugPrivilege 2820 RegAsm.exe -
Suspicious use of FindShellTrayWindow 3 IoCs
Processes:
b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exepid Process 2104 b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exe 2104 b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exe 2104 b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exe -
Suspicious use of SendNotifyMessage 3 IoCs
Processes:
b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exepid Process 2104 b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exe 2104 b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exe 2104 b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exe -
Suspicious use of WriteProcessMemory 17 IoCs
Processes:
b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exeRegAsm.exedescription pid Process procid_target PID 2104 wrote to memory of 2820 2104 b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exe 29 PID 2104 wrote to memory of 2820 2104 b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exe 29 PID 2104 wrote to memory of 2820 2104 b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exe 29 PID 2104 wrote to memory of 2820 2104 b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exe 29 PID 2104 wrote to memory of 2820 2104 b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exe 29 PID 2104 wrote to memory of 2820 2104 b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exe 29 PID 2104 wrote to memory of 2820 2104 b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exe 29 PID 2104 wrote to memory of 2820 2104 b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exe 29 PID 2104 wrote to memory of 2820 2104 b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exe 29 PID 2820 wrote to memory of 2640 2820 RegAsm.exe 30 PID 2820 wrote to memory of 2640 2820 RegAsm.exe 30 PID 2820 wrote to memory of 2640 2820 RegAsm.exe 30 PID 2820 wrote to memory of 2640 2820 RegAsm.exe 30 PID 2820 wrote to memory of 1708 2820 RegAsm.exe 32 PID 2820 wrote to memory of 1708 2820 RegAsm.exe 32 PID 2820 wrote to memory of 1708 2820 RegAsm.exe 32 PID 2820 wrote to memory of 1708 2820 RegAsm.exe 32
Processes
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C:\Users\Admin\AppData\Local\Temp\b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exe"C:\Users\Admin\AppData\Local\Temp\b703608dbbdb2877db1d0f7e989ca3b5b3bebb272cae6a5ba9f130a49d5abd0e.exe"1⤵
- Drops startup file
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:2104 -
C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"2⤵
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2820 -
C:\Windows\SysWOW64\schtasks.exe"schtasks.exe" /create /f /tn "DOS Manager" /xml "C:\Users\Admin\AppData\Local\Temp\tmpBDF2.tmp"3⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:2640
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C:\Windows\SysWOW64\schtasks.exe"schtasks.exe" /create /f /tn "DOS Manager Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpBF6A.tmp"3⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:1708
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Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
1KB
MD5c6f0625bf4c1cdfb699980c9243d3b22
SHA143de1fe580576935516327f17b5da0c656c72851
SHA2568dfc4e937f0b2374e3ced25fce344b0731cf44b8854625b318d50ece2da8f576
SHA5129ef2dbd4142ad0e1e6006929376ecb8011e7ffc801ee2101e906787d70325ad82752df65839de9972391fa52e1e5974ec1a5c7465a88aa56257633ebb7d70969
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Filesize
1KB
MD58f5713b14cee3089852f6c8d2a7a7d57
SHA18bffbea05715c6434ad593cce8a2c737f80ff788
SHA256ab3ce102242c3144f87bcbfe83984a478821cd09e62c0e5211b2ab37dde02d2c
SHA51282bd2378c2d6bb34a1ad3f2d26bfea583fc8403691bed6668521ba3e8bc7bdbdf142f872ddbc8e5251550f47c9bbee4eb3d0d6096f80d85259082cf68a454c72