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

564 remcos.exe
Loads dropped DLL 1 IoCs

Processes:

aspnet_compiler.exe

pid process

1964 aspnet_compiler.exe

pid	process
564	remcos.exe

pid	process
1964	aspnet_compiler.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
Key created	\REGISTRY\USER\S-1-5-21-2961826002-3968192592-354541192-1000\Software\Microsoft\Windows\CurrentVersion\Run\	aspnet_compiler.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2961826002-3968192592-354541192-1000\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
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

Suspicious use of SetThreadContext 1 IoCs

Processes:

2b262120999e89d0fae7cacf763301a6.exe

description pid process target process

PID 924 set thread context of 1964 924 2b262120999e89d0fae7cacf763301a6.exe aspnet_compiler.exe

description	pid	process	target process
PID 924 set thread context of 1964	924	2b262120999e89d0fae7cacf763301a6.exe	aspnet_compiler.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

2b262120999e89d0fae7cacf763301a6.exeaspnet_compiler.exe

description	pid	process	target process
PID 924 wrote to memory of 1964	924	2b262120999e89d0fae7cacf763301a6.exe	aspnet_compiler.exe
PID 924 wrote to memory of 1964	924	2b262120999e89d0fae7cacf763301a6.exe	aspnet_compiler.exe
PID 924 wrote to memory of 1964	924	2b262120999e89d0fae7cacf763301a6.exe	aspnet_compiler.exe
PID 924 wrote to memory of 1964	924	2b262120999e89d0fae7cacf763301a6.exe	aspnet_compiler.exe
PID 924 wrote to memory of 1964	924	2b262120999e89d0fae7cacf763301a6.exe	aspnet_compiler.exe
PID 924 wrote to memory of 1964	924	2b262120999e89d0fae7cacf763301a6.exe	aspnet_compiler.exe
PID 924 wrote to memory of 1964	924	2b262120999e89d0fae7cacf763301a6.exe	aspnet_compiler.exe
PID 924 wrote to memory of 1964	924	2b262120999e89d0fae7cacf763301a6.exe	aspnet_compiler.exe
PID 924 wrote to memory of 1964	924	2b262120999e89d0fae7cacf763301a6.exe	aspnet_compiler.exe
PID 924 wrote to memory of 1964	924	2b262120999e89d0fae7cacf763301a6.exe	aspnet_compiler.exe
PID 924 wrote to memory of 1964	924	2b262120999e89d0fae7cacf763301a6.exe	aspnet_compiler.exe
PID 924 wrote to memory of 1964	924	2b262120999e89d0fae7cacf763301a6.exe	aspnet_compiler.exe
PID 924 wrote to memory of 1964	924	2b262120999e89d0fae7cacf763301a6.exe	aspnet_compiler.exe
PID 1964 wrote to memory of 564	1964	aspnet_compiler.exe	remcos.exe
PID 1964 wrote to memory of 564	1964	aspnet_compiler.exe	remcos.exe
PID 1964 wrote to memory of 564	1964	aspnet_compiler.exe	remcos.exe
PID 1964 wrote to memory of 564	1964	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:924

C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
2⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1964

C:\Users\Admin\AppData\Local\Temp\Remcos\remcos.exe
"C:\Users\Admin\AppData\Local\Temp\Remcos\remcos.exe"
3⤵
- Executes dropped EXE
PID:564

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
54KB

MD5
1e98e92a982af948ee18ee819a2d8ad1

SHA1
6cb0bd87815118351e5e32c50b434079dfba255c

SHA256
235d3f96a78ce2dad584e6eb1a25fc386b3ae5e332c4d3c56f03b0a4978be778

SHA512
6711de2e00462c49852cee03fd8ef720310c4ffa5b3a653c08f2913a6146974f28b8a3b3ff38b3097310852a5aa3b964b77945bcefef3856911eb9acd0e42c6f

Download Submit
C:\Users\Admin\AppData\Local\Temp\Remcos\remcos.exe
Filesize
54KB

MD5
1e98e92a982af948ee18ee819a2d8ad1

SHA1
6cb0bd87815118351e5e32c50b434079dfba255c

SHA256
235d3f96a78ce2dad584e6eb1a25fc386b3ae5e332c4d3c56f03b0a4978be778

SHA512
6711de2e00462c49852cee03fd8ef720310c4ffa5b3a653c08f2913a6146974f28b8a3b3ff38b3097310852a5aa3b964b77945bcefef3856911eb9acd0e42c6f

Download Submit
\Users\Admin\AppData\Local\Temp\Remcos\remcos.exe
Filesize
54KB

MD5
1e98e92a982af948ee18ee819a2d8ad1

SHA1
6cb0bd87815118351e5e32c50b434079dfba255c

SHA256
235d3f96a78ce2dad584e6eb1a25fc386b3ae5e332c4d3c56f03b0a4978be778

SHA512
6711de2e00462c49852cee03fd8ef720310c4ffa5b3a653c08f2913a6146974f28b8a3b3ff38b3097310852a5aa3b964b77945bcefef3856911eb9acd0e42c6f

Download Submit
memory/564-78-0x0000000000390000-0x00000000003A0000-memory.dmp

Filesize
64KB

Download
memory/924-65-0x000000001BC10000-0x000000001BC90000-memory.dmp

Filesize
512KB

Download
memory/924-55-0x00000000023E0000-0x0000000002454000-memory.dmp

Filesize
464KB

Download
memory/924-56-0x0000000000350000-0x000000000035C000-memory.dmp

Filesize
48KB

Download
memory/924-54-0x0000000000380000-0x0000000000404000-memory.dmp

Filesize
528KB

Download
memory/1964-59-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/1964-63-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/1964-64-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/1964-66-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1964-62-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/1964-67-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/1964-69-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/1964-61-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/1964-60-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/1964-76-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/1964-58-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/1964-57-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download

Analysis

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