Analysis
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max time kernel
150s -
max time network
168s -
platform
windows7_x64 -
resource
win7-20231215-en -
resource tags
arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system -
submitted
26-12-2023 08:28
Behavioral task
behavioral1
Sample
5fcda7ba7ec8e67ff814d484a57d62ab.exe
Resource
win7-20231215-en
General
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Target
5fcda7ba7ec8e67ff814d484a57d62ab.exe
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Size
1.4MB
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MD5
5fcda7ba7ec8e67ff814d484a57d62ab
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SHA1
d20c5e1a365838ca57e62f023e66abcfa62fe798
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SHA256
394a5f08dcda3e2a0112f4019653139676389637cb465509c6d644a5eed0f45a
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SHA512
09d335abac66d0b382165de007a5466228c1725fa7a90f0da08aae054a1a57a0370f32f16d943b61d0e17fbe6e9939fe671f90525b79b57415519e6cc7970c5b
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SSDEEP
24576:k6yJMY9UFoRDhkeYM1jJR97zUbia9JVe0hs5WfBiERJchVML1bT6E7:rY9UORVOM1jJHzaiape0hsABFRJch6Lv
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 behavioral1/memory/2880-9-0x0000000000990000-0x00000000009BC000-memory.dmp rezer0 -
Executes dropped EXE 1 IoCs
Processes:
test.exepid process 2880 test.exe -
Loads dropped DLL 1 IoCs
Processes:
cmd.exepid process 1996 cmd.exe -
Processes:
resource yara_rule behavioral1/memory/1456-1-0x0000000000400000-0x00000000006F1000-memory.dmp upx behavioral1/memory/1456-10-0x0000000000400000-0x00000000006F1000-memory.dmp upx behavioral1/memory/1456-29-0x0000000000400000-0x00000000006F1000-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 2880 set thread context of 2744 2880 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 1 IoCs
Processes:
test.exepid process 2880 test.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
test.exedescription pid process Token: SeDebugPrivilege 2880 test.exe -
Suspicious use of WriteProcessMemory 23 IoCs
Processes:
5fcda7ba7ec8e67ff814d484a57d62ab.execmd.exetest.exedescription pid process target process PID 1456 wrote to memory of 1996 1456 5fcda7ba7ec8e67ff814d484a57d62ab.exe cmd.exe PID 1456 wrote to memory of 1996 1456 5fcda7ba7ec8e67ff814d484a57d62ab.exe cmd.exe PID 1456 wrote to memory of 1996 1456 5fcda7ba7ec8e67ff814d484a57d62ab.exe cmd.exe PID 1456 wrote to memory of 1996 1456 5fcda7ba7ec8e67ff814d484a57d62ab.exe cmd.exe PID 1996 wrote to memory of 2880 1996 cmd.exe test.exe PID 1996 wrote to memory of 2880 1996 cmd.exe test.exe PID 1996 wrote to memory of 2880 1996 cmd.exe test.exe PID 1996 wrote to memory of 2880 1996 cmd.exe test.exe PID 2880 wrote to memory of 2716 2880 test.exe schtasks.exe PID 2880 wrote to memory of 2716 2880 test.exe schtasks.exe PID 2880 wrote to memory of 2716 2880 test.exe schtasks.exe PID 2880 wrote to memory of 2716 2880 test.exe schtasks.exe PID 2880 wrote to memory of 2744 2880 test.exe vbc.exe PID 2880 wrote to memory of 2744 2880 test.exe vbc.exe PID 2880 wrote to memory of 2744 2880 test.exe vbc.exe PID 2880 wrote to memory of 2744 2880 test.exe vbc.exe PID 2880 wrote to memory of 2744 2880 test.exe vbc.exe PID 2880 wrote to memory of 2744 2880 test.exe vbc.exe PID 2880 wrote to memory of 2744 2880 test.exe vbc.exe PID 2880 wrote to memory of 2744 2880 test.exe vbc.exe PID 2880 wrote to memory of 2744 2880 test.exe vbc.exe PID 2880 wrote to memory of 2744 2880 test.exe vbc.exe PID 2880 wrote to memory of 2744 2880 test.exe vbc.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\5fcda7ba7ec8e67ff814d484a57d62ab.exe"C:\Users\Admin\AppData\Local\Temp\5fcda7ba7ec8e67ff814d484a57d62ab.exe"1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c test.exe2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\test.exetest.exe3⤵
- 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\tmpD98D.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\tmpD98D.tmpFilesize
1KB
MD5902952c50cfbfe65e3aedd0f73188ca3
SHA11a139d2beb98d43abdc66123120d42ecc195254e
SHA256f85ff75e6ce28d6c17b144ab49b835ab17f1f9608b815bcebec097321acc512c
SHA512e636980a73540141f658112bdc0189d8471692eaf0af191a131676adf4a79a2f08a2d7fa5c7c7b23cdb1f63728f4ea39c1e66ef5336e8f8e9be2440f8188b772
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memory/1456-10-0x0000000000400000-0x00000000006F1000-memory.dmpFilesize
2.9MB
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memory/1456-29-0x0000000000400000-0x00000000006F1000-memory.dmpFilesize
2.9MB
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memory/1456-1-0x0000000000400000-0x00000000006F1000-memory.dmpFilesize
2.9MB
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memory/2744-25-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2744-27-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2744-53-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2744-51-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2744-17-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2744-16-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2744-18-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2744-19-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2744-20-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2744-22-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmpFilesize
4KB
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memory/2744-21-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2744-23-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2744-49-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2744-47-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2744-28-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2744-45-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2744-43-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2744-30-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2744-31-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2744-32-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2744-33-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2744-35-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2744-37-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2744-39-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2744-41-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2880-5-0x0000000000BF0000-0x0000000000C48000-memory.dmpFilesize
352KB
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memory/2880-9-0x0000000000990000-0x00000000009BC000-memory.dmpFilesize
176KB
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memory/2880-6-0x0000000074D10000-0x00000000753FE000-memory.dmpFilesize
6.9MB
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memory/2880-26-0x0000000074D10000-0x00000000753FE000-memory.dmpFilesize
6.9MB
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memory/2880-7-0x00000000044A0000-0x00000000044E0000-memory.dmpFilesize
256KB
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memory/2880-8-0x0000000000540000-0x0000000000548000-memory.dmpFilesize
32KB