Analysis
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max time kernel
153s -
max time network
168s -
platform
windows10-2004_x64 -
resource
win10v2004-20220414-en -
submitted
26-06-2022 05:56
Static task
static1
Behavioral task
behavioral1
Sample
rc.exe
Resource
win7-20220414-en
Behavioral task
behavioral2
Sample
rc.exe
Resource
win10v2004-20220414-en
General
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Target
rc.exe
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Size
985KB
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MD5
0e5c23d14dc6448fff9ee7fe356cee81
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SHA1
fae0a0acbf6e174b22d3fe0ff6cfe332a462b33b
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SHA256
a1098873c94184cf24edd24c3883f4be52224575da34f0469ad4a525c852ef28
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SHA512
6363c36750aa00e9f521d402f10f37745bd0f8a4ab2cfddbf342bce7743b8a853016e2afc58982f719d316d73fe255841276966a508eb3ccb7ce83733ff12b03
Malware Config
Extracted
remcos
06192022
nikahuve.ac.ug:6968
kalskala.ac.ug:6968
tuekisaa.ac.ug:6968
parthaha.ac.ug:6968
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audio_folder
MicRecords
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audio_path
%AppData%
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audio_record_time
5
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connect_delay
0
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connect_interval
1
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copy_file
remcos.exe
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copy_folder
Remcos
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delete_file
false
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hide_file
false
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hide_keylog_file
true
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install_flag
false
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install_path
%AppData%
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keylog_crypt
true
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keylog_file
scxs.dat
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keylog_flag
false
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keylog_folder
forbas
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keylog_path
%AppData%
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mouse_option
false
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mutex
cvxyttydfsgbghfgfhtd-RXTSAM
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screenshot_crypt
false
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screenshot_flag
false
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screenshot_folder
Screenshots
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screenshot_path
%AppData%
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screenshot_time
10
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startup_value
Remcos
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take_screenshot_option
false
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take_screenshot_time
5
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take_screenshot_title
notepad;solitaire;
Signatures
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
rc.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation rc.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
rc.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winost = "\"C:\\Users\\Admin\\AppData\\Roaming\\winost.exe\"" rc.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
rc.exedescription pid process target process PID 2788 set thread context of 1624 2788 rc.exe MSBuild.exe -
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 4 IoCs
Processes:
powershell.exerc.exepid process 3744 powershell.exe 3744 powershell.exe 2788 rc.exe 2788 rc.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
rc.exepowershell.exedescription pid process Token: SeDebugPrivilege 2788 rc.exe Token: SeDebugPrivilege 3744 powershell.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
MSBuild.exepid process 1624 MSBuild.exe -
Suspicious use of WriteProcessMemory 15 IoCs
Processes:
rc.exedescription pid process target process PID 2788 wrote to memory of 3744 2788 rc.exe powershell.exe PID 2788 wrote to memory of 3744 2788 rc.exe powershell.exe PID 2788 wrote to memory of 3744 2788 rc.exe powershell.exe PID 2788 wrote to memory of 1624 2788 rc.exe MSBuild.exe PID 2788 wrote to memory of 1624 2788 rc.exe MSBuild.exe PID 2788 wrote to memory of 1624 2788 rc.exe MSBuild.exe PID 2788 wrote to memory of 1624 2788 rc.exe MSBuild.exe PID 2788 wrote to memory of 1624 2788 rc.exe MSBuild.exe PID 2788 wrote to memory of 1624 2788 rc.exe MSBuild.exe PID 2788 wrote to memory of 1624 2788 rc.exe MSBuild.exe PID 2788 wrote to memory of 1624 2788 rc.exe MSBuild.exe PID 2788 wrote to memory of 1624 2788 rc.exe MSBuild.exe PID 2788 wrote to memory of 1624 2788 rc.exe MSBuild.exe PID 2788 wrote to memory of 1624 2788 rc.exe MSBuild.exe PID 2788 wrote to memory of 1624 2788 rc.exe MSBuild.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\rc.exe"C:\Users\Admin\AppData\Local\Temp\rc.exe"1⤵
- Checks computer location settings
- Adds Run key to start application
- 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" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAAMQAwADsAIABTAGUAdAAtAE0AcABQAHIAZQBmAGUAcgBlAG4AYwBlACAALQBFAHgAYwBsAHUAcwBpAG8AbgBQAGEAdABoACAAJwBDADoAXAAnAA==2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exeC:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe2⤵
- Suspicious use of SetWindowsHookEx
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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memory/1624-158-0x0000000000400000-0x000000000047B000-memory.dmpFilesize
492KB
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memory/1624-157-0x0000000000400000-0x000000000047B000-memory.dmpFilesize
492KB
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memory/1624-156-0x0000000000400000-0x000000000047B000-memory.dmpFilesize
492KB
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memory/1624-154-0x0000000000400000-0x000000000047B000-memory.dmpFilesize
492KB
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memory/1624-155-0x0000000000400000-0x000000000047B000-memory.dmpFilesize
492KB
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memory/1624-153-0x0000000000000000-mapping.dmp
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memory/2788-130-0x0000000000D60000-0x0000000000E5C000-memory.dmpFilesize
1008KB
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memory/2788-131-0x0000000005790000-0x0000000005806000-memory.dmpFilesize
472KB
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memory/2788-132-0x0000000005BE0000-0x0000000005C30000-memory.dmpFilesize
320KB
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memory/2788-133-0x00000000015E0000-0x0000000001692000-memory.dmpFilesize
712KB
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memory/2788-134-0x00000000014B0000-0x00000000014CE000-memory.dmpFilesize
120KB
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memory/2788-135-0x0000000005F30000-0x0000000005FC2000-memory.dmpFilesize
584KB
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memory/3744-144-0x0000000006830000-0x000000000684A000-memory.dmpFilesize
104KB
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memory/3744-151-0x0000000007980000-0x000000000799A000-memory.dmpFilesize
104KB
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memory/3744-142-0x0000000006330000-0x000000000634E000-memory.dmpFilesize
120KB
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memory/3744-145-0x0000000007570000-0x00000000075A2000-memory.dmpFilesize
200KB
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memory/3744-146-0x00000000702C0000-0x000000007030C000-memory.dmpFilesize
304KB
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memory/3744-147-0x0000000007550000-0x000000000756E000-memory.dmpFilesize
120KB
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memory/3744-148-0x00000000076B0000-0x00000000076BA000-memory.dmpFilesize
40KB
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memory/3744-149-0x00000000078C0000-0x0000000007956000-memory.dmpFilesize
600KB
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memory/3744-150-0x0000000005070000-0x000000000507E000-memory.dmpFilesize
56KB
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memory/3744-143-0x0000000007B70000-0x00000000081EA000-memory.dmpFilesize
6.5MB
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memory/3744-152-0x0000000007970000-0x0000000007978000-memory.dmpFilesize
32KB
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memory/3744-141-0x0000000005D10000-0x0000000005D76000-memory.dmpFilesize
408KB
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memory/3744-140-0x0000000005C30000-0x0000000005C96000-memory.dmpFilesize
408KB
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memory/3744-139-0x00000000054A0000-0x00000000054C2000-memory.dmpFilesize
136KB
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memory/3744-138-0x0000000005600000-0x0000000005C28000-memory.dmpFilesize
6.2MB
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memory/3744-137-0x0000000002D50000-0x0000000002D86000-memory.dmpFilesize
216KB
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memory/3744-136-0x0000000000000000-mapping.dmp