Analysis
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max time kernel
148s -
max time network
151s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
22-06-2024 18:46
Static task
static1
Behavioral task
behavioral1
Sample
Revised Proforma.exe
Resource
win7-20240221-en
General
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Target
Revised Proforma.exe
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Size
1.2MB
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MD5
046570a828d5e69cd2954bdda2a11237
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SHA1
cb4cf09a0fe36818568f36baeff8e6c440144e99
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SHA256
4acf03db392b5f729ddd9cd867ce0d39b5405ca170596a4c2df002785c6e15ff
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SHA512
f197eb2ff09598e786bc0890e164947cb7ddc3ac7db77737517534e874ca4878a0da3bf2c63b537519f7fcc0097c6515ca6310264fe6c8d26b84c500c8301f86
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SSDEEP
24576:aCdxte/80jYLT3U1jfsWazJPZD3Q5k8TE9k0Q:7w80cTsjkWazKE9m
Malware Config
Extracted
nanocore
1.2.2.0
95.213.251.165:54964
98b3078c-a32d-4ad5-899c-a0f3dceb693c
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activate_away_mode
true
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backup_connection_host
95.213.251.165
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backup_dns_server
8.8.4.4
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buffer_size
65535
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build_time
2019-01-07T22:09:13.514087636Z
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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
false
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clear_zone_identifier
false
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connect_delay
4000
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connection_port
54964
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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
98b3078c-a32d-4ad5-899c-a0f3dceb693c
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mutex_timeout
5000
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prevent_system_sleep
false
- primary_connection_host
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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
false
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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:
Revised Proforma.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\cdp.url Revised Proforma.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\NAS Host = "C:\\Program Files (x86)\\NAS Host\\nashost.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:
Revised Proforma.exedescription pid process target process PID 2204 set thread context of 360 2204 Revised Proforma.exe RegAsm.exe -
Drops file in Program Files directory 2 IoCs
Processes:
RegAsm.exedescription ioc process File opened for modification C:\Program Files (x86)\NAS Host\nashost.exe RegAsm.exe File created C:\Program Files (x86)\NAS Host\nashost.exe RegAsm.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 1912 schtasks.exe 2992 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
RegAsm.exepid process 360 RegAsm.exe 360 RegAsm.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
RegAsm.exepid process 360 RegAsm.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
RegAsm.exedescription pid process Token: SeDebugPrivilege 360 RegAsm.exe Token: SeDebugPrivilege 360 RegAsm.exe -
Suspicious use of FindShellTrayWindow 3 IoCs
Processes:
Revised Proforma.exepid process 2204 Revised Proforma.exe 2204 Revised Proforma.exe 2204 Revised Proforma.exe -
Suspicious use of SendNotifyMessage 3 IoCs
Processes:
Revised Proforma.exepid process 2204 Revised Proforma.exe 2204 Revised Proforma.exe 2204 Revised Proforma.exe -
Suspicious use of WriteProcessMemory 17 IoCs
Processes:
Revised Proforma.exeRegAsm.exedescription pid process target process PID 2204 wrote to memory of 360 2204 Revised Proforma.exe RegAsm.exe PID 2204 wrote to memory of 360 2204 Revised Proforma.exe RegAsm.exe PID 2204 wrote to memory of 360 2204 Revised Proforma.exe RegAsm.exe PID 2204 wrote to memory of 360 2204 Revised Proforma.exe RegAsm.exe PID 2204 wrote to memory of 360 2204 Revised Proforma.exe RegAsm.exe PID 2204 wrote to memory of 360 2204 Revised Proforma.exe RegAsm.exe PID 2204 wrote to memory of 360 2204 Revised Proforma.exe RegAsm.exe PID 2204 wrote to memory of 360 2204 Revised Proforma.exe RegAsm.exe PID 2204 wrote to memory of 360 2204 Revised Proforma.exe RegAsm.exe PID 360 wrote to memory of 1912 360 RegAsm.exe schtasks.exe PID 360 wrote to memory of 1912 360 RegAsm.exe schtasks.exe PID 360 wrote to memory of 1912 360 RegAsm.exe schtasks.exe PID 360 wrote to memory of 1912 360 RegAsm.exe schtasks.exe PID 360 wrote to memory of 2992 360 RegAsm.exe schtasks.exe PID 360 wrote to memory of 2992 360 RegAsm.exe schtasks.exe PID 360 wrote to memory of 2992 360 RegAsm.exe schtasks.exe PID 360 wrote to memory of 2992 360 RegAsm.exe schtasks.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\Revised Proforma.exe"C:\Users\Admin\AppData\Local\Temp\Revised Proforma.exe"1⤵
- Drops startup file
- Suspicious use of SetThreadContext
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
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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
- 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 "NAS Host" /xml "C:\Users\Admin\AppData\Local\Temp\tmp1B8C.tmp"3⤵
- Scheduled Task/Job: Scheduled Task
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C:\Windows\SysWOW64\schtasks.exe"schtasks.exe" /create /f /tn "NAS Host Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp1C39.tmp"3⤵
- Scheduled Task/Job: Scheduled Task
Network
MITRE ATT&CK Matrix ATT&CK v13
Persistence
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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C:\Users\Admin\AppData\Local\Temp\tmp1B8C.tmpFilesize
1KB
MD5c6f0625bf4c1cdfb699980c9243d3b22
SHA143de1fe580576935516327f17b5da0c656c72851
SHA2568dfc4e937f0b2374e3ced25fce344b0731cf44b8854625b318d50ece2da8f576
SHA5129ef2dbd4142ad0e1e6006929376ecb8011e7ffc801ee2101e906787d70325ad82752df65839de9972391fa52e1e5974ec1a5c7465a88aa56257633ebb7d70969
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C:\Users\Admin\AppData\Local\Temp\tmp1C39.tmpFilesize
1KB
MD59f554f602c22cfc20079e966d177fadb
SHA1789baa3425849bf239e47c6bcf352e6693a8c337
SHA2564c760d5fe0c06cf4bf554170870f41181c61a217c37eb826903094dda86dd1f1
SHA512b83e3e97dbe38ec4c64d9bef65e2521416f2d7434d78d05e66f729a2e0fbfea3f9bc6f6c4abaf76555af89a9565dfc0853d99067be9042dd66ed6246696eecbb
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memory/360-0-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/360-5-0x000000007EFDE000-0x000000007EFDF000-memory.dmpFilesize
4KB
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memory/360-8-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/360-7-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/360-1-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/360-10-0x0000000074192000-0x0000000074194000-memory.dmpFilesize
8KB
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memory/360-22-0x0000000074192000-0x0000000074194000-memory.dmpFilesize
8KB
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memory/2204-9-0x0000000000170000-0x0000000000171000-memory.dmpFilesize
4KB