Analysis
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max time kernel
150s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
07-03-2024 22:55
Behavioral task
behavioral1
Sample
b9df9c09f708b886eee75c536d7e002a.exe
Resource
win7-20240220-en
General
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Target
b9df9c09f708b886eee75c536d7e002a.exe
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Size
1.4MB
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MD5
b9df9c09f708b886eee75c536d7e002a
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SHA1
f47797d0b3ed574db1ae1a3c7820cfeee6d21d3f
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SHA256
a47783e77972a2cd6711b618b3dd3a57544e6c225e37d44961e967b2530e63da
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SHA512
156c61f2a7d9108b42491d5a2d457be36913faff6ac23044372120e481beb32c08a4c4f121067b2b58f0485649ddd8f396f2fdc89db30c4772222adb2b6c6a86
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SSDEEP
24576:n6yJMY9UFoRDhkeYM1jJR97zUbia9JVe0hs5WfBiERJchVML1bT6ER:6Y9UORVOM1jJHzaiape0hsABFRJch6Ll
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/224-12-0x0000000004FF0000-0x000000000501C000-memory.dmp rezer0 -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
test.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-3270530367-132075249-2153716227-1000\Control Panel\International\Geo\Nation test.exe -
Executes dropped EXE 1 IoCs
Processes:
test.exepid process 224 test.exe -
Processes:
resource yara_rule behavioral2/memory/396-0-0x0000000000400000-0x00000000006F1000-memory.dmp upx behavioral2/memory/396-14-0x0000000000400000-0x00000000006F1000-memory.dmp upx behavioral2/memory/396-25-0x0000000000400000-0x00000000006F1000-memory.dmp upx -
Uses the VBS compiler for execution 1 TTPs
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Suspicious use of SetThreadContext 1 IoCs
Processes:
test.exedescription pid process target process PID 224 set thread context of 3652 224 test.exe vbc.exe -
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 behavior: EnumeratesProcesses 2 IoCs
Processes:
test.exepid process 224 test.exe 224 test.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
test.exedescription pid process Token: SeDebugPrivilege 224 test.exe -
Suspicious use of WriteProcessMemory 19 IoCs
Processes:
b9df9c09f708b886eee75c536d7e002a.execmd.exetest.exedescription pid process target process PID 396 wrote to memory of 2792 396 b9df9c09f708b886eee75c536d7e002a.exe cmd.exe PID 396 wrote to memory of 2792 396 b9df9c09f708b886eee75c536d7e002a.exe cmd.exe PID 396 wrote to memory of 2792 396 b9df9c09f708b886eee75c536d7e002a.exe cmd.exe PID 2792 wrote to memory of 224 2792 cmd.exe test.exe PID 2792 wrote to memory of 224 2792 cmd.exe test.exe PID 2792 wrote to memory of 224 2792 cmd.exe test.exe PID 224 wrote to memory of 4568 224 test.exe schtasks.exe PID 224 wrote to memory of 4568 224 test.exe schtasks.exe PID 224 wrote to memory of 4568 224 test.exe schtasks.exe PID 224 wrote to memory of 3652 224 test.exe vbc.exe PID 224 wrote to memory of 3652 224 test.exe vbc.exe PID 224 wrote to memory of 3652 224 test.exe vbc.exe PID 224 wrote to memory of 3652 224 test.exe vbc.exe PID 224 wrote to memory of 3652 224 test.exe vbc.exe PID 224 wrote to memory of 3652 224 test.exe vbc.exe PID 224 wrote to memory of 3652 224 test.exe vbc.exe PID 224 wrote to memory of 3652 224 test.exe vbc.exe PID 224 wrote to memory of 3652 224 test.exe vbc.exe PID 224 wrote to memory of 3652 224 test.exe vbc.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\b9df9c09f708b886eee75c536d7e002a.exe"C:\Users\Admin\AppData\Local\Temp\b9df9c09f708b886eee75c536d7e002a.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.exe3⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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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\tmp6050.tmp"4⤵
- Creates scheduled task(s)
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"{path}"4⤵
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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C:\Users\Admin\AppData\Local\Temp\tmp6050.tmpFilesize
1KB
MD566c45f2dc09e157e96cd885a1cc9652e
SHA14eacbb2bbb7bd501e764040b12ec68d49e8d78f1
SHA256f05ce7bb8baa8178c192b240f098c005efa6c2041be7d9ffe4221ba290ead940
SHA512df08efc2285004894c75e35c6ef3d85b18d2dd55a894636bb1ee2b7314ab99d9bda39eee926d8e8023126ca50d2083fad464b7795e159be4aafc7deb4e29804d
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memory/224-9-0x0000000004C80000-0x0000000004C90000-memory.dmpFilesize
64KB
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memory/224-5-0x0000000000190000-0x00000000001E8000-memory.dmpFilesize
352KB
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memory/224-24-0x0000000074990000-0x0000000075140000-memory.dmpFilesize
7.7MB
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memory/224-8-0x0000000004B10000-0x0000000004BA2000-memory.dmpFilesize
584KB
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memory/224-12-0x0000000004FF0000-0x000000000501C000-memory.dmpFilesize
176KB
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memory/224-10-0x0000000004AB0000-0x0000000004ABA000-memory.dmpFilesize
40KB
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memory/224-11-0x0000000004AA0000-0x0000000004AA8000-memory.dmpFilesize
32KB
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memory/224-6-0x0000000074990000-0x0000000075140000-memory.dmpFilesize
7.7MB
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memory/224-13-0x00000000056B0000-0x000000000574C000-memory.dmpFilesize
624KB
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memory/224-7-0x0000000005020000-0x00000000055C4000-memory.dmpFilesize
5.6MB
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memory/396-0-0x0000000000400000-0x00000000006F1000-memory.dmpFilesize
2.9MB
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memory/396-25-0x0000000000400000-0x00000000006F1000-memory.dmpFilesize
2.9MB
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memory/396-14-0x0000000000400000-0x00000000006F1000-memory.dmpFilesize
2.9MB
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memory/3652-28-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/3652-23-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/3652-26-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/3652-27-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/3652-20-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/3652-29-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/3652-30-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/3652-32-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/3652-36-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/3652-38-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/3652-42-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/3652-50-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB