Analysis
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max time kernel
151s -
max time network
155s -
platform
windows10-2004_x64 -
resource
win10v2004-20220414-en -
submitted
21-05-2022 12:20
Static task
static1
Behavioral task
behavioral1
Sample
Offer Request 6100003768,pdf.exe
Resource
win7-20220414-en
Behavioral task
behavioral2
Sample
Offer Request 6100003768,pdf.exe
Resource
win10v2004-20220414-en
General
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Target
Offer Request 6100003768,pdf.exe
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Size
289KB
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MD5
b41cc5d5d29433eba84d43adae2f53aa
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SHA1
985bd980736009c65be2b0307a18abe01cdcd6ab
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SHA256
313a41fbc3104d06f0930f422d0ac01d6113cbe01be85c9024873ee7f0214b02
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SHA512
a12b232bfa41c4e2d9b9d64cdac37642fd33ec619eed65a270b2333fd31b81bd133095ef33a4069518f58263d7e0947a399898cd2b6b6b951e82b824349e4d6b
Malware Config
Extracted
remcos
2.5.0 Pro
RemoteHost
ifeanyiogbunebe.ddns.net:1965
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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
false
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install_flag
false
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install_path
%AppData%
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keylog_crypt
false
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keylog_file
logs.dat
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keylog_flag
false
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keylog_folder
remcos
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keylog_path
%AppData%
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mouse_option
false
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mutex
Remcos-30G8UD
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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
wikipedia;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:
Offer Request 6100003768,pdf.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation Offer Request 6100003768,pdf.exe -
Uses the VBS compiler for execution 1 TTPs
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Suspicious use of SetThreadContext 1 IoCs
Processes:
Offer Request 6100003768,pdf.exedescription pid process target process PID 1616 set thread context of 5048 1616 Offer Request 6100003768,pdf.exe vbc.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
vbc.exepid process 5048 vbc.exe -
Suspicious use of WriteProcessMemory 13 IoCs
Processes:
Offer Request 6100003768,pdf.exedescription pid process target process PID 1616 wrote to memory of 5116 1616 Offer Request 6100003768,pdf.exe schtasks.exe PID 1616 wrote to memory of 5116 1616 Offer Request 6100003768,pdf.exe schtasks.exe PID 1616 wrote to memory of 5116 1616 Offer Request 6100003768,pdf.exe schtasks.exe PID 1616 wrote to memory of 5048 1616 Offer Request 6100003768,pdf.exe vbc.exe PID 1616 wrote to memory of 5048 1616 Offer Request 6100003768,pdf.exe vbc.exe PID 1616 wrote to memory of 5048 1616 Offer Request 6100003768,pdf.exe vbc.exe PID 1616 wrote to memory of 5048 1616 Offer Request 6100003768,pdf.exe vbc.exe PID 1616 wrote to memory of 5048 1616 Offer Request 6100003768,pdf.exe vbc.exe PID 1616 wrote to memory of 5048 1616 Offer Request 6100003768,pdf.exe vbc.exe PID 1616 wrote to memory of 5048 1616 Offer Request 6100003768,pdf.exe vbc.exe PID 1616 wrote to memory of 5048 1616 Offer Request 6100003768,pdf.exe vbc.exe PID 1616 wrote to memory of 5048 1616 Offer Request 6100003768,pdf.exe vbc.exe PID 1616 wrote to memory of 5048 1616 Offer Request 6100003768,pdf.exe vbc.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\Offer Request 6100003768,pdf.exe"C:\Users\Admin\AppData\Local\Temp\Offer Request 6100003768,pdf.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\EvVOvjDGKzkGs" /XML "C:\Users\Admin\AppData\Local\Temp\tmpF39C.tmp"2⤵
- Creates scheduled task(s)
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"{path}"2⤵
- Suspicious use of SetWindowsHookEx
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Temp\tmpF39C.tmpFilesize
1KB
MD52c14e4cf2e7f3fc4aa69127c83aabe8d
SHA13a134a03d95d2cfc6e6e201146d4b65c619aae40
SHA256090e892ad69ad36b81df2422c7646d37c350469402865759173248c8dcb6d568
SHA5126d9f2f8ee3dc953c7add8d06849093c541380a2d305b16a96abba395227f0391d226f910d95d2611e666168cfbe46204e54fc14f9c15e81bcd4f8d6358f7d602
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memory/1616-130-0x0000000000F40000-0x0000000000F8E000-memory.dmpFilesize
312KB
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memory/1616-131-0x0000000005FF0000-0x0000000006594000-memory.dmpFilesize
5.6MB
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memory/1616-132-0x0000000005920000-0x00000000059B2000-memory.dmpFilesize
584KB
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memory/1616-133-0x00000000059D0000-0x00000000059DA000-memory.dmpFilesize
40KB
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memory/1616-134-0x00000000092B0000-0x000000000934C000-memory.dmpFilesize
624KB
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memory/5048-137-0x0000000000000000-mapping.dmp
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memory/5048-138-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/5048-140-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/5048-141-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/5116-135-0x0000000000000000-mapping.dmp