Analysis
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max time kernel
196s -
max time network
199s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
26/11/2022, 23:32
Static task
static1
Behavioral task
behavioral1
Sample
ca0fe1d580e881e6908aced30a49c9f48cd8ea14c769571b1a60bd8eee033102.exe
Resource
win7-20220812-en
General
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Target
ca0fe1d580e881e6908aced30a49c9f48cd8ea14c769571b1a60bd8eee033102.exe
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Size
1.6MB
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MD5
e7e37ae20a4bf093b1a048f81eb62ad6
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SHA1
c8fce91ab8cc803074b7de4ebcd2fbf0f71a20e9
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SHA256
ca0fe1d580e881e6908aced30a49c9f48cd8ea14c769571b1a60bd8eee033102
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SHA512
231188f996387c4836ef1174a096b0f066f0d5b28f517738ccd1cfa830c54edbf49c385cf8406734afa2d4030e5fe9182563bd2ae3efc7a6a6791bd6148ec6ac
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SSDEEP
24576:fRmJkcoQricOIQxiZY1iaMc6EuDZzY3fIJNfHT7W00KJBUnbrvb4Vn7E:0JZoQrbTFZY1ia8Afkzlv3Ubp
Malware Config
Extracted
nanocore
1.2.1.1
donx.strangled.net:3175
da61f0aa-aa41-407f-9f66-5bdaf5a6bb2c
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activate_away_mode
true
- backup_connection_host
- backup_dns_server
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buffer_size
65535
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build_time
2014-10-16T23:01:56.136889236Z
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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
false
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connect_delay
4000
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connection_port
3175
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default_group
Crypted Stub
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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
da61f0aa-aa41-407f-9f66-5bdaf5a6bb2c
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mutex_timeout
5000
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prevent_system_sleep
false
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primary_connection_host
donx.strangled.net
- primary_dns_server
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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
1.2.1.1
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wan_timeout
8000
Signatures
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Modifies WinLogon for persistence 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "%AppData%\\Windows\\Sidebar.exe,explorer.exe" ca0fe1d580e881e6908aced30a49c9f48cd8ea14c769571b1a60bd8eee033102.exe -
Adds Run key to start application 2 TTPs 2 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows\CurrentVersion\Run ca0fe1d580e881e6908aced30a49c9f48cd8ea14c769571b1a60bd8eee033102.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\2 = "%AppData%\\Windows\\Sidebar.exe" ca0fe1d580e881e6908aced30a49c9f48cd8ea14c769571b1a60bd8eee033102.exe -
description ioc Process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA RegAsm.exe -
Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 4804 set thread context of 2076 4804 ca0fe1d580e881e6908aced30a49c9f48cd8ea14c769571b1a60bd8eee033102.exe 80 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: EnumeratesProcesses 7 IoCs
pid Process 2076 RegAsm.exe 2076 RegAsm.exe 2076 RegAsm.exe 2076 RegAsm.exe 2076 RegAsm.exe 2076 RegAsm.exe 2076 RegAsm.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 2076 RegAsm.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 2076 RegAsm.exe -
Suspicious use of WriteProcessMemory 8 IoCs
description pid Process procid_target PID 4804 wrote to memory of 2076 4804 ca0fe1d580e881e6908aced30a49c9f48cd8ea14c769571b1a60bd8eee033102.exe 80 PID 4804 wrote to memory of 2076 4804 ca0fe1d580e881e6908aced30a49c9f48cd8ea14c769571b1a60bd8eee033102.exe 80 PID 4804 wrote to memory of 2076 4804 ca0fe1d580e881e6908aced30a49c9f48cd8ea14c769571b1a60bd8eee033102.exe 80 PID 4804 wrote to memory of 2076 4804 ca0fe1d580e881e6908aced30a49c9f48cd8ea14c769571b1a60bd8eee033102.exe 80 PID 4804 wrote to memory of 2076 4804 ca0fe1d580e881e6908aced30a49c9f48cd8ea14c769571b1a60bd8eee033102.exe 80 PID 4804 wrote to memory of 2076 4804 ca0fe1d580e881e6908aced30a49c9f48cd8ea14c769571b1a60bd8eee033102.exe 80 PID 4804 wrote to memory of 2076 4804 ca0fe1d580e881e6908aced30a49c9f48cd8ea14c769571b1a60bd8eee033102.exe 80 PID 4804 wrote to memory of 2076 4804 ca0fe1d580e881e6908aced30a49c9f48cd8ea14c769571b1a60bd8eee033102.exe 80
Processes
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C:\Users\Admin\AppData\Local\Temp\ca0fe1d580e881e6908aced30a49c9f48cd8ea14c769571b1a60bd8eee033102.exe"C:\Users\Admin\AppData\Local\Temp\ca0fe1d580e881e6908aced30a49c9f48cd8ea14c769571b1a60bd8eee033102.exe"1⤵
- Modifies WinLogon for persistence
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4804 -
C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"2⤵
- Checks whether UAC is enabled
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
PID:2076
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