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Analysis
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max time kernel
149s -
max time network
147s -
platform
windows7_x64 -
resource
win7-20231129-en -
resource tags
arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system -
submitted
25/12/2023, 18:44
Behavioral task
behavioral1
Sample
3563d53e5d239655686b28e74442222e.exe
Resource
win7-20231129-en
General
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Target
3563d53e5d239655686b28e74442222e.exe
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Size
1.4MB
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MD5
3563d53e5d239655686b28e74442222e
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SHA1
27aa08fdf838f9cfd7eceb7e6d2df148e3e7df07
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SHA256
0e51d9a05ced1a052a3d1e040c77d7e2159f5337739d69521d14dacbb599a0bd
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SHA512
0c145b3f63f7ece8b8cda919da7e806ded3dcb5575402c155c6372aaf8579a7944f4ea9294a91c78fdba665a02a2b975d8083cd563614cd97c5be98330198687
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SSDEEP
24576:e6yJMY9UFoRDhkeYM1jJR97zUbia9JVe0hs5WfBiERJchVML1bT6EQ:pY9UORVOM1jJHzaiape0hsABFRJch6LE
Malware Config
Extracted
remcos
2.5.0 Pro
GRACED
thankyoulord.ddns.net:5050
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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-0S5XD9
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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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ReZer0 packer 1 IoCs
Detects ReZer0, a packer with multiple versions used in various campaigns.
resource yara_rule behavioral1/memory/2044-9-0x0000000000F60000-0x0000000000F8C000-memory.dmp rezer0 -
Executes dropped EXE 1 IoCs
pid Process 2044 test.exe -
Loads dropped DLL 1 IoCs
pid Process 1748 cmd.exe -
resource yara_rule behavioral1/memory/2180-0-0x0000000000400000-0x00000000006F1000-memory.dmp upx behavioral1/memory/2180-27-0x0000000000400000-0x00000000006F1000-memory.dmp upx -
Uses the VBS compiler for execution 1 TTPs
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Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 2044 set thread context of 2708 2044 test.exe 32 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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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.
pid Process 2748 schtasks.exe -
Suspicious use of WriteProcessMemory 23 IoCs
description pid Process procid_target PID 2180 wrote to memory of 1748 2180 3563d53e5d239655686b28e74442222e.exe 15 PID 2180 wrote to memory of 1748 2180 3563d53e5d239655686b28e74442222e.exe 15 PID 2180 wrote to memory of 1748 2180 3563d53e5d239655686b28e74442222e.exe 15 PID 2180 wrote to memory of 1748 2180 3563d53e5d239655686b28e74442222e.exe 15 PID 1748 wrote to memory of 2044 1748 cmd.exe 14 PID 1748 wrote to memory of 2044 1748 cmd.exe 14 PID 1748 wrote to memory of 2044 1748 cmd.exe 14 PID 1748 wrote to memory of 2044 1748 cmd.exe 14 PID 2044 wrote to memory of 2748 2044 test.exe 33 PID 2044 wrote to memory of 2748 2044 test.exe 33 PID 2044 wrote to memory of 2748 2044 test.exe 33 PID 2044 wrote to memory of 2748 2044 test.exe 33 PID 2044 wrote to memory of 2708 2044 test.exe 32 PID 2044 wrote to memory of 2708 2044 test.exe 32 PID 2044 wrote to memory of 2708 2044 test.exe 32 PID 2044 wrote to memory of 2708 2044 test.exe 32 PID 2044 wrote to memory of 2708 2044 test.exe 32 PID 2044 wrote to memory of 2708 2044 test.exe 32 PID 2044 wrote to memory of 2708 2044 test.exe 32 PID 2044 wrote to memory of 2708 2044 test.exe 32 PID 2044 wrote to memory of 2708 2044 test.exe 32 PID 2044 wrote to memory of 2708 2044 test.exe 32 PID 2044 wrote to memory of 2708 2044 test.exe 32
Processes
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C:\Users\Admin\AppData\Local\Temp\test.exetest.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2044 -
C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"{path}"2⤵PID:2708
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\vXAlJeWc" /XML "C:\Users\Admin\AppData\Local\Temp\tmp4450.tmp"2⤵
- Creates scheduled task(s)
PID:2748
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C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c test.exe1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1748
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C:\Users\Admin\AppData\Local\Temp\3563d53e5d239655686b28e74442222e.exe"C:\Users\Admin\AppData\Local\Temp\3563d53e5d239655686b28e74442222e.exe"1⤵
- Suspicious use of WriteProcessMemory
PID:2180