remcos | e69d1e9f023deebccd2174f8507017de6ce4d62fb2c3603b708be5889c371b22

General

Target

2b262120999e89d0fae7cacf763301a6.exe
Size

511KB
MD5

2b262120999e89d0fae7cacf763301a6
SHA1

1c81fe7a9891b4d0657769478f5d315d2e278960
SHA256

e69d1e9f023deebccd2174f8507017de6ce4d62fb2c3603b708be5889c371b22
SHA512

d668fa003e24e20010678265e78199067258eb58f5cb7b35e3426276f72328111329ef178f671b36e429d6d28a3faa4a6af51dbd660943c3777e811618678c44
SSDEEP

12288:NUn4wO6TWyzY0sGvhb2L1Kdvi/GC1GtATEaO89kkGMrnC:Nm4wIoT900qyQN

Score

10^/10

remcos remotehost persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

pekonomiana.duckdns.org:30491

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
true
install_path
%Temp%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-VSUHIC
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Executes dropped EXE 1 IoCs

Processes:

remcos.exe

pid process

516 remcos.exe

pid	process
516	remcos.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

aspnet_compiler.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-VSUHIC = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Remcos\\remcos.exe\""	aspnet_compiler.exe
Key created	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\Software\Microsoft\Windows\CurrentVersion\Run\	aspnet_compiler.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-VSUHIC = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Remcos\\remcos.exe\""	aspnet_compiler.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	aspnet_compiler.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

2b262120999e89d0fae7cacf763301a6.exe

description pid process target process

PID 4356 set thread context of 3436 4356 2b262120999e89d0fae7cacf763301a6.exe aspnet_compiler.exe

description	pid	process	target process
PID 4356 set thread context of 3436	4356	2b262120999e89d0fae7cacf763301a6.exe	aspnet_compiler.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

2b262120999e89d0fae7cacf763301a6.exeaspnet_compiler.exe

description	pid	process	target process
PID 4356 wrote to memory of 3436	4356	2b262120999e89d0fae7cacf763301a6.exe	aspnet_compiler.exe
PID 4356 wrote to memory of 3436	4356	2b262120999e89d0fae7cacf763301a6.exe	aspnet_compiler.exe
PID 4356 wrote to memory of 3436	4356	2b262120999e89d0fae7cacf763301a6.exe	aspnet_compiler.exe
PID 4356 wrote to memory of 3436	4356	2b262120999e89d0fae7cacf763301a6.exe	aspnet_compiler.exe
PID 4356 wrote to memory of 3436	4356	2b262120999e89d0fae7cacf763301a6.exe	aspnet_compiler.exe
PID 4356 wrote to memory of 3436	4356	2b262120999e89d0fae7cacf763301a6.exe	aspnet_compiler.exe
PID 4356 wrote to memory of 3436	4356	2b262120999e89d0fae7cacf763301a6.exe	aspnet_compiler.exe
PID 4356 wrote to memory of 3436	4356	2b262120999e89d0fae7cacf763301a6.exe	aspnet_compiler.exe
PID 4356 wrote to memory of 3436	4356	2b262120999e89d0fae7cacf763301a6.exe	aspnet_compiler.exe
PID 4356 wrote to memory of 3436	4356	2b262120999e89d0fae7cacf763301a6.exe	aspnet_compiler.exe
PID 4356 wrote to memory of 3436	4356	2b262120999e89d0fae7cacf763301a6.exe	aspnet_compiler.exe
PID 4356 wrote to memory of 3436	4356	2b262120999e89d0fae7cacf763301a6.exe	aspnet_compiler.exe
PID 3436 wrote to memory of 516	3436	aspnet_compiler.exe	remcos.exe
PID 3436 wrote to memory of 516	3436	aspnet_compiler.exe	remcos.exe
PID 3436 wrote to memory of 516	3436	aspnet_compiler.exe	remcos.exe

C:\Users\Admin\AppData\Local\Temp\2b262120999e89d0fae7cacf763301a6.exe
"C:\Users\Admin\AppData\Local\Temp\2b262120999e89d0fae7cacf763301a6.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4356

C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
2⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:3436

C:\Users\Admin\AppData\Local\Temp\Remcos\remcos.exe
"C:\Users\Admin\AppData\Local\Temp\Remcos\remcos.exe"
3⤵
- Executes dropped EXE
PID:516

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\Remcos\remcos.exe
Filesize
55KB

MD5
fda8c8f2a4e100afb14c13dfcbcab2d2

SHA1
19dfd86294c4a525ba21c6af77681b2a9bbecb55

SHA256
99a2c778c9a6486639d0aff1a7d2d494c2b0dc4c7913ebcb7bfea50a2f1d0b09

SHA512
94f0ace37cae77be9935cf4fc8aaa94691343d3b38de5e16c663b902c220bff513cd02256c7af2d815a23dd30439582ddbb0880009c76bbf36ff8fbc1a6ddc18

Download Submit
C:\Users\Admin\AppData\Local\Temp\Remcos\remcos.exe
Filesize
55KB

MD5
fda8c8f2a4e100afb14c13dfcbcab2d2

SHA1
19dfd86294c4a525ba21c6af77681b2a9bbecb55

SHA256
99a2c778c9a6486639d0aff1a7d2d494c2b0dc4c7913ebcb7bfea50a2f1d0b09

SHA512
94f0ace37cae77be9935cf4fc8aaa94691343d3b38de5e16c663b902c220bff513cd02256c7af2d815a23dd30439582ddbb0880009c76bbf36ff8fbc1a6ddc18

Download Submit
C:\Users\Admin\AppData\Local\Temp\Remcos\remcos.exe
Filesize
55KB

MD5
fda8c8f2a4e100afb14c13dfcbcab2d2

SHA1
19dfd86294c4a525ba21c6af77681b2a9bbecb55

SHA256
99a2c778c9a6486639d0aff1a7d2d494c2b0dc4c7913ebcb7bfea50a2f1d0b09

SHA512
94f0ace37cae77be9935cf4fc8aaa94691343d3b38de5e16c663b902c220bff513cd02256c7af2d815a23dd30439582ddbb0880009c76bbf36ff8fbc1a6ddc18

Download Submit
memory/516-150-0x0000000000670000-0x0000000000680000-memory.dmp

Filesize
64KB

Download
memory/516-151-0x0000000005520000-0x0000000005A4C000-memory.dmp

Filesize
5.2MB

Download
memory/3436-134-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/3436-136-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/3436-137-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/3436-148-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4356-133-0x0000020DF8A20000-0x0000020DF8AA4000-memory.dmp

Filesize
528KB

Download

Analysis

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