Analysis
-
max time kernel
149s -
max time network
157s -
platform
windows10_x64 -
resource
win10v20210408 -
submitted
14-10-2021 04:36
Static task
static1
Behavioral task
behavioral1
Sample
invo.scr
Resource
win7-en-20210920
General
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Target
invo.scr
-
Size
495KB
-
MD5
1c64859d2a5e195b51b5c1d0b973b2f3
-
SHA1
733895a6df13037644634316b616f2ab1818960f
-
SHA256
c0ef6cc74722f234a5d8176116dd0df60c32ce0a2ae7a7b88cf9dffd94f7f1a1
-
SHA512
bc144fadf9f0b3a4ad6092693935b4ef2063a3f9fb429cc33d69b54db65872540065c323e64021b09107babaabb9057a9276cfbb897ddef2cedbd7ea3353762c
Malware Config
Extracted
nanocore
1.2.2.0
185.140.53.75:97
75237636-ccfc-402a-827d-5ad01371659e
-
activate_away_mode
true
- backup_connection_host
-
backup_dns_server
8.8.4.4
-
buffer_size
65535
-
build_time
2021-07-24T01:53:34.394429836Z
-
bypass_user_account_control
false
-
bypass_user_account_control_data
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
-
clear_access_control
true
-
clear_zone_identifier
false
-
connect_delay
4000
-
connection_port
97
-
default_group
Default
-
enable_debug_mode
true
-
gc_threshold
1.048576e+07
-
keep_alive_timeout
30000
-
keyboard_logging
false
-
lan_timeout
2500
-
max_packet_size
1.048576e+07
-
mutex
75237636-ccfc-402a-827d-5ad01371659e
-
mutex_timeout
5000
-
prevent_system_sleep
false
-
primary_connection_host
185.140.53.75
-
primary_dns_server
8.8.8.8
-
request_elevation
true
-
restart_delay
5000
-
run_delay
0
-
run_on_startup
false
-
set_critical_process
true
-
timeout_interval
5000
-
use_custom_dns_server
false
-
version
1.2.2.0
-
wan_timeout
8000
Signatures
-
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
RegSvcs.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\UPNP Subsystem = "C:\\Program Files (x86)\\UPNP Subsystem\\upnpss.exe" RegSvcs.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
invo.scrdescription pid process target process PID 808 set thread context of 2092 808 invo.scr RegSvcs.exe -
Drops file in Program Files directory 2 IoCs
Processes:
RegSvcs.exedescription ioc process File created C:\Program Files (x86)\UPNP Subsystem\upnpss.exe RegSvcs.exe File opened for modification C:\Program Files (x86)\UPNP Subsystem\upnpss.exe RegSvcs.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
-
Creates scheduled task(s) 1 TTPs 3 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
Processes:
schtasks.exeschtasks.exeschtasks.exepid process 2232 schtasks.exe 2952 schtasks.exe 2332 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 8 IoCs
Processes:
invo.scrRegSvcs.exepowershell.exepid process 808 invo.scr 808 invo.scr 2092 RegSvcs.exe 2092 RegSvcs.exe 2092 RegSvcs.exe 1360 powershell.exe 1360 powershell.exe 1360 powershell.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
RegSvcs.exepid process 2092 RegSvcs.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
invo.scrRegSvcs.exepowershell.exedescription pid process Token: SeDebugPrivilege 808 invo.scr Token: SeDebugPrivilege 2092 RegSvcs.exe Token: SeDebugPrivilege 1360 powershell.exe -
Suspicious use of WriteProcessMemory 20 IoCs
Processes:
invo.scrRegSvcs.exedescription pid process target process PID 808 wrote to memory of 1360 808 invo.scr powershell.exe PID 808 wrote to memory of 1360 808 invo.scr powershell.exe PID 808 wrote to memory of 1360 808 invo.scr powershell.exe PID 808 wrote to memory of 2332 808 invo.scr schtasks.exe PID 808 wrote to memory of 2332 808 invo.scr schtasks.exe PID 808 wrote to memory of 2332 808 invo.scr schtasks.exe PID 808 wrote to memory of 2092 808 invo.scr RegSvcs.exe PID 808 wrote to memory of 2092 808 invo.scr RegSvcs.exe PID 808 wrote to memory of 2092 808 invo.scr RegSvcs.exe PID 808 wrote to memory of 2092 808 invo.scr RegSvcs.exe PID 808 wrote to memory of 2092 808 invo.scr RegSvcs.exe PID 808 wrote to memory of 2092 808 invo.scr RegSvcs.exe PID 808 wrote to memory of 2092 808 invo.scr RegSvcs.exe PID 808 wrote to memory of 2092 808 invo.scr RegSvcs.exe PID 2092 wrote to memory of 2232 2092 RegSvcs.exe schtasks.exe PID 2092 wrote to memory of 2232 2092 RegSvcs.exe schtasks.exe PID 2092 wrote to memory of 2232 2092 RegSvcs.exe schtasks.exe PID 2092 wrote to memory of 2952 2092 RegSvcs.exe schtasks.exe PID 2092 wrote to memory of 2952 2092 RegSvcs.exe schtasks.exe PID 2092 wrote to memory of 2952 2092 RegSvcs.exe schtasks.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\invo.scr"C:\Users\Admin\AppData\Local\Temp\invo.scr" /S1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\invo.scr"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\sdEKmbTTxgFtdd" /XML "C:\Users\Admin\AppData\Local\Temp\tmp4576.tmp"2⤵
- Creates scheduled task(s)
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C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe"C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe"2⤵
- Adds Run key to start application
- 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 "UPNP Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmp4900.tmp"3⤵
- Creates scheduled task(s)
-
C:\Windows\SysWOW64\schtasks.exe"schtasks.exe" /create /f /tn "UPNP Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp497E.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\tmp4900.tmpMD5
40b11ef601fb28f9b2e69d36857bf2ec
SHA1b6454020ad2ceed193f4792b77001d0bd741b370
SHA256c51e12d18cc664425f6711d8ae2507068884c7057092cfa11884100e1e9d49e1
SHA512e3c5bcc714cbfca4b8058ddcddf231dcefa69c15881ce3f8123e59ed45cfb5da052b56e1945dcf8dc7f800d62f9a4eecb82bca69a66a1530787aeffeb15e2bd5
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C:\Users\Admin\AppData\Local\Temp\tmp497E.tmpMD5
af9986f5e128fd8bd3ae748fcba6576d
SHA18060072c35108b48649a03be91803b97f1ad40a4
SHA256f3242f6480b3d1a8f9285135fdce9a201c4802ce062eee4fb41c488a21d53303
SHA512f35c8e1699905bc972ae48a5a4a9fd33ea04b2d851ffc1cb1d1573a2087121d803b4186a696b2edad10a9c46c388a478e105f5a730020b598aa9f483086dba38
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memory/808-114-0x00000000029F0000-0x00000000029F1000-memory.dmpFilesize
4KB
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memory/1360-121-0x0000000000D20000-0x0000000000D21000-memory.dmpFilesize
4KB
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memory/1360-115-0x0000000000000000-mapping.dmp
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memory/1360-119-0x00000000006B0000-0x00000000006B1000-memory.dmpFilesize
4KB
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memory/1360-120-0x00000000006B0000-0x00000000006B1000-memory.dmpFilesize
4KB
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memory/1360-159-0x000000007EE50000-0x000000007EE51000-memory.dmpFilesize
4KB
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memory/1360-160-0x0000000000D93000-0x0000000000D94000-memory.dmpFilesize
4KB
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memory/1360-123-0x0000000000D90000-0x0000000000D91000-memory.dmpFilesize
4KB
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memory/1360-158-0x0000000008F40000-0x0000000008F41000-memory.dmpFilesize
4KB
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memory/1360-157-0x0000000008DA0000-0x0000000008DA1000-memory.dmpFilesize
4KB
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memory/1360-126-0x0000000006BE0000-0x0000000006BE1000-memory.dmpFilesize
4KB
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memory/1360-152-0x0000000008A10000-0x0000000008A11000-memory.dmpFilesize
4KB
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memory/1360-138-0x00000000006B0000-0x00000000006B1000-memory.dmpFilesize
4KB
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memory/1360-129-0x0000000000D92000-0x0000000000D93000-memory.dmpFilesize
4KB
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memory/1360-145-0x0000000008C70000-0x0000000008CA3000-memory.dmpFilesize
204KB
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memory/1360-131-0x0000000006AE0000-0x0000000006AE1000-memory.dmpFilesize
4KB
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memory/1360-132-0x00000000072C0000-0x00000000072C1000-memory.dmpFilesize
4KB
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memory/1360-133-0x0000000007510000-0x0000000007511000-memory.dmpFilesize
4KB
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memory/1360-134-0x00000000075F0000-0x00000000075F1000-memory.dmpFilesize
4KB
-
memory/1360-135-0x00000000073F0000-0x00000000073F1000-memory.dmpFilesize
4KB
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memory/1360-136-0x0000000007DD0000-0x0000000007DD1000-memory.dmpFilesize
4KB
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memory/1360-137-0x0000000007C70000-0x0000000007C71000-memory.dmpFilesize
4KB
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memory/2092-130-0x0000000002F21000-0x0000000002F22000-memory.dmpFilesize
4KB
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memory/2092-118-0x000000000041E792-mapping.dmp
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memory/2092-122-0x0000000002F20000-0x0000000002F21000-memory.dmpFilesize
4KB
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memory/2092-117-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/2232-124-0x0000000000000000-mapping.dmp
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memory/2332-116-0x0000000000000000-mapping.dmp
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memory/2952-127-0x0000000000000000-mapping.dmp