Analysis
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max time kernel
149s -
max time network
156s -
platform
windows10-2004_x64 -
resource
win10v2004-20220901-en -
resource tags
arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system -
submitted
12-10-2022 10:44
Static task
static1
Behavioral task
behavioral1
Sample
vbc.exe
Resource
win7-20220901-en
General
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Target
vbc.exe
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Size
931KB
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MD5
90af5bffeb1c24c1f9f02ec8566af684
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SHA1
d07c1a371a93be377b0dc8ce6f3c331d01f1ee3f
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SHA256
e801e38f603136aa52c0f83ea0169b732b0d5aafd7e01ba1cc5b33add09a36b6
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SHA512
dadcf1437cfea1f401daf0c86c6dc94c8804256c091b190c17918e8f9ef3c37f9acaed5cc98f1ea60ab63a76e9e36ec650fc4797c7c3b69d1fa244cc13ef5465
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SSDEEP
12288:xrHx6UJg5sRMQfw4Wx7egMLYVfYJ9mgDHBk/dVF5OtZoRNFIzRMg:xUUC6MkUYH9hHW/d9
Malware Config
Extracted
nanocore
1.2.2.0
albertsamco76.ddns.net:7480
79.134.225.71:7480
595ac7be-87a8-4935-8bed-199af086cae8
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activate_away_mode
true
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backup_connection_host
79.134.225.71
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backup_dns_server
8.8.4.4
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buffer_size
65535
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build_time
2022-07-15T18:29:52.126272236Z
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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
5000
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connection_port
7480
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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
595ac7be-87a8-4935-8bed-199af086cae8
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mutex_timeout
5000
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prevent_system_sleep
false
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primary_connection_host
albertsamco76.ddns.net
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primary_dns_server
8.8.8.8
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request_elevation
false
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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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Uses the VBS compiler for execution 1 TTPs
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
vbc.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\DHCP Subsystem = "C:\\Program Files (x86)\\DHCP Subsystem\\dhcpss.exe" vbc.exe -
Processes:
vbc.exedescription ioc process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA vbc.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
vbc.exedescription pid process target process PID 2064 set thread context of 1232 2064 vbc.exe vbc.exe -
Drops file in Program Files directory 2 IoCs
Processes:
vbc.exedescription ioc process File opened for modification C:\Program Files (x86)\DHCP Subsystem\dhcpss.exe vbc.exe File created C:\Program Files (x86)\DHCP Subsystem\dhcpss.exe vbc.exe -
Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
Processes:
schtasks.exeschtasks.exepid process 4128 schtasks.exe 4572 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 13 IoCs
Processes:
vbc.exevbc.exepid process 2064 vbc.exe 2064 vbc.exe 2064 vbc.exe 2064 vbc.exe 2064 vbc.exe 2064 vbc.exe 2064 vbc.exe 1232 vbc.exe 1232 vbc.exe 1232 vbc.exe 1232 vbc.exe 1232 vbc.exe 1232 vbc.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
vbc.exepid process 1232 vbc.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
vbc.exevbc.exedescription pid process Token: SeDebugPrivilege 2064 vbc.exe Token: SeDebugPrivilege 1232 vbc.exe -
Suspicious use of WriteProcessMemory 14 IoCs
Processes:
vbc.exevbc.exedescription pid process target process PID 2064 wrote to memory of 1232 2064 vbc.exe vbc.exe PID 2064 wrote to memory of 1232 2064 vbc.exe vbc.exe PID 2064 wrote to memory of 1232 2064 vbc.exe vbc.exe PID 2064 wrote to memory of 1232 2064 vbc.exe vbc.exe PID 2064 wrote to memory of 1232 2064 vbc.exe vbc.exe PID 2064 wrote to memory of 1232 2064 vbc.exe vbc.exe PID 2064 wrote to memory of 1232 2064 vbc.exe vbc.exe PID 2064 wrote to memory of 1232 2064 vbc.exe vbc.exe PID 1232 wrote to memory of 4128 1232 vbc.exe schtasks.exe PID 1232 wrote to memory of 4128 1232 vbc.exe schtasks.exe PID 1232 wrote to memory of 4128 1232 vbc.exe schtasks.exe PID 1232 wrote to memory of 4572 1232 vbc.exe schtasks.exe PID 1232 wrote to memory of 4572 1232 vbc.exe schtasks.exe PID 1232 wrote to memory of 4572 1232 vbc.exe schtasks.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\vbc.exe"C:\Users\Admin\AppData\Local\Temp\vbc.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\vbc.exe"C:\Users\Admin\AppData\Local\Temp\vbc.exe"2⤵
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe"schtasks.exe" /create /f /tn "DHCP Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmpAEAF.tmp"3⤵
- Creates scheduled task(s)
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C:\Windows\SysWOW64\schtasks.exe"schtasks.exe" /create /f /tn "DHCP Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpB130.tmp"3⤵
- Creates scheduled task(s)
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Temp\tmpAEAF.tmpFilesize
1KB
MD5fd6482c8e3c8dacb7f6635ac6681aa5d
SHA1c11d7e5d72c35ffbc79ac9811d0f4757f7f015fe
SHA2567a2d7675bdb72946abf108f24ad568916819c8cfc8ef487d55c111145f2b0afc
SHA51253746f4359c63cf55619314204cc4c3320dfdcfaed5c778e4bb0f496a557084d9b6c882c70c9e01ae0101dee6bdde72e8e7a80f6950212cf4a66b1a625794da3
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C:\Users\Admin\AppData\Local\Temp\tmpB130.tmpFilesize
1KB
MD52f26d92c1eeead3896820e56ec46f6f1
SHA1d95533b61eed7d89e4ada56bc566d60e42ac1f61
SHA25699a158463ce40c750bad6991ae1fceece305a0dbf8e209dd7147b5d539756bfa
SHA5126c1ed12d5e1afcd9e7f327e0153786fd8594f75a995f341c408ef014e69917452a9fe99c511f0249aceb57b3045b707f1fd3f404e4086cfbf0aadcb3318db892
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memory/1232-134-0x0000000000000000-mapping.dmp
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memory/1232-135-0x0000000000400000-0x000000000043A000-memory.dmpFilesize
232KB
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memory/1232-138-0x0000000074BF0000-0x00000000751A1000-memory.dmpFilesize
5.7MB
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memory/1232-142-0x0000000074BF0000-0x00000000751A1000-memory.dmpFilesize
5.7MB
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memory/2064-132-0x0000000074BF0000-0x00000000751A1000-memory.dmpFilesize
5.7MB
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memory/2064-133-0x0000000074BF0000-0x00000000751A1000-memory.dmpFilesize
5.7MB
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memory/2064-136-0x0000000074BF0000-0x00000000751A1000-memory.dmpFilesize
5.7MB
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memory/4128-137-0x0000000000000000-mapping.dmp
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memory/4572-140-0x0000000000000000-mapping.dmp