Analysis
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max time kernel
11s -
max time network
134s -
platform
windows10-2004_x64 -
resource
win10v2004-20231222-en -
resource tags
arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system -
submitted
07-01-2024 19:08
Behavioral task
behavioral1
Sample
a1f6790b7576fb5eee8c0dc29d6c1740.exe
Resource
win7-20231215-en
General
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Target
a1f6790b7576fb5eee8c0dc29d6c1740.exe
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Size
1.4MB
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MD5
a1f6790b7576fb5eee8c0dc29d6c1740
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SHA1
662597c705d33f7c6678e68e9b7d4b964ef1bfe2
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SHA256
de0d4994a1ad1a24ef1fb67a79be19d78d50d1eb994542ae63385abace8c9b46
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SHA512
443cbdecbd5a45f9468a058d3609ace5f79cf19722599e19b1e5634b616fef6c82edca667bef337f99c0152bf0c6cb3fd07a3381afcaafb2444567dfa53500c8
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SSDEEP
24576:46yJMY9UFoRDhkeYM1jJR97zUbia9JVe0hs5WfBiERJchVML1bT6Et:XY9UORVOM1jJHzaiape0hsABFRJch6L5
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.
Processes:
resource yara_rule behavioral2/memory/4608-12-0x00000000056D0000-0x00000000056FC000-memory.dmp rezer0 -
Executes dropped EXE 1 IoCs
Processes:
test.exepid process 4608 test.exe -
Processes:
resource yara_rule behavioral2/memory/4428-0-0x0000000000400000-0x00000000006F2000-memory.dmp upx behavioral2/memory/4428-27-0x0000000000400000-0x00000000006F2000-memory.dmp upx -
Uses the VBS compiler for execution 1 TTPs
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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.
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Suspicious use of WriteProcessMemory 6 IoCs
Processes:
a1f6790b7576fb5eee8c0dc29d6c1740.execmd.exedescription pid process target process PID 4428 wrote to memory of 3380 4428 a1f6790b7576fb5eee8c0dc29d6c1740.exe cmd.exe PID 4428 wrote to memory of 3380 4428 a1f6790b7576fb5eee8c0dc29d6c1740.exe cmd.exe PID 4428 wrote to memory of 3380 4428 a1f6790b7576fb5eee8c0dc29d6c1740.exe cmd.exe PID 3380 wrote to memory of 4608 3380 cmd.exe test.exe PID 3380 wrote to memory of 4608 3380 cmd.exe test.exe PID 3380 wrote to memory of 4608 3380 cmd.exe test.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\a1f6790b7576fb5eee8c0dc29d6c1740.exe"C:\Users\Admin\AppData\Local\Temp\a1f6790b7576fb5eee8c0dc29d6c1740.exe"1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c test.exe2⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\test.exetest.exe1⤵
- Executes dropped EXE
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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\tmp7BE7.tmp"2⤵
- Creates scheduled task(s)
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"{path}"2⤵
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Temp\test.exeFilesize
330KB
MD5261aa73f93c90dcec0c36a51cb9b5dee
SHA1b0c41e06cd2ded81706820423db40bf8fea2c957
SHA256ae160b749914bd56aecbcf43d56a59bde2069a145682b2911fe50c6adabe1b54
SHA5127b90335b4a7db7b5056f6d60db642754038dc544bd2c1f82e68b1f8e339bf70227f0c08d157b4ca1004448fab7d109f0239196f242d0edeab978de9025a3c0ed
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memory/260-39-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/260-49-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/260-47-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/260-45-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/260-43-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/260-23-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/260-32-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/260-30-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/260-29-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/260-20-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/260-24-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/260-28-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/4428-27-0x0000000000400000-0x00000000006F2000-memory.dmpFilesize
2.9MB
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memory/4428-0-0x0000000000400000-0x00000000006F2000-memory.dmpFilesize
2.9MB
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memory/4608-25-0x00000000746D0000-0x0000000074E80000-memory.dmpFilesize
7.7MB
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memory/4608-12-0x00000000056D0000-0x00000000056FC000-memory.dmpFilesize
176KB
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memory/4608-13-0x00000000057A0000-0x000000000583C000-memory.dmpFilesize
624KB
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memory/4608-11-0x0000000004B90000-0x0000000004B98000-memory.dmpFilesize
32KB
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memory/4608-10-0x0000000004BA0000-0x0000000004BAA000-memory.dmpFilesize
40KB
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memory/4608-9-0x0000000004D40000-0x0000000004D50000-memory.dmpFilesize
64KB
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memory/4608-5-0x0000000000140000-0x0000000000198000-memory.dmpFilesize
352KB
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memory/4608-8-0x0000000004BD0000-0x0000000004C62000-memory.dmpFilesize
584KB
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memory/4608-7-0x00000000050E0000-0x0000000005684000-memory.dmpFilesize
5.6MB
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memory/4608-6-0x00000000746D0000-0x0000000074E80000-memory.dmpFilesize
7.7MB