remcos | 7945af6330f9db4cc74c1ec96949eb3e4f934f1283c1db38c639035cd91c6047

General

Target

039308d47114c1bc4976d88869edf65d7f0658cb11a9eca534123578219b8c6c.exe
Size

140KB
MD5

c756a2338f5a176d3980852b6314dc7e
SHA1

a2d3e69abc628a43c02e7538d31023d3138fd0bd
SHA256

039308d47114c1bc4976d88869edf65d7f0658cb11a9eca534123578219b8c6c
SHA512

336d2a871149d487de7c2fc9887ff381305076caaed6865cf313fe69c694b57ca9872f74dde137a345563ab7ec00f93ad3643e40298cb17f74059182a935ace0
SSDEEP

3072:iq7eoTLJQYF6kUCkAODrIlPzBBQGkAVFOnpYwZnQqO8b6x:XxStAODrIlrBSiSmub6

Score

10^/10

remcos mxsv discovery rat

Malware Config

Extracted

Family

remcos

Version

1.9.2 Pro

Botnet

MXSV

C2

casillas.hicam.net:2404

casillasmx.chickenkiller.com:2404

casillas45.hopto.org:2404

casillas.libfoobar.so:2404

du4alr0ute.sendsmtp.com:2404

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
remcos.exe
copy_folder
remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
rem92-P9KLDM
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
1
startup_value
remcos
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Remcos family
remcos

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4456 set thread context of 2848	4456	039308d47114c1bc4976d88869edf65d7f0658cb11a9eca534123578219b8c6c.exe	84
PID 4456 set thread context of 4264	4456	039308d47114c1bc4976d88869edf65d7f0658cb11a9eca534123578219b8c6c.exe	85

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\security.config.cch.new	039308d47114c1bc4976d88869edf65d7f0658cb11a9eca534123578219b8c6c.exe
File created	C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\enterprisesec.config.cch.new	039308d47114c1bc4976d88869edf65d7f0658cb11a9eca534123578219b8c6c.exe

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	039308d47114c1bc4976d88869edf65d7f0658cb11a9eca534123578219b8c6c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	regasm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	039308d47114c1bc4976d88869edf65d7f0658cb11a9eca534123578219b8c6c.exe

Suspicious behavior: EnumeratesProcesses 30 IoCs

pid	Process
4264	regasm.exe
4264	regasm.exe
4264	regasm.exe
4264	regasm.exe
4264	regasm.exe
4264	regasm.exe
4264	regasm.exe
4264	regasm.exe
4264	regasm.exe
4264	regasm.exe
4264	regasm.exe
4264	regasm.exe
4264	regasm.exe
4264	regasm.exe
4264	regasm.exe
4264	regasm.exe
4264	regasm.exe
4264	regasm.exe
4264	regasm.exe
4264	regasm.exe
4264	regasm.exe
4264	regasm.exe
4264	regasm.exe
4264	regasm.exe
4264	regasm.exe
4264	regasm.exe
4264	regasm.exe
4264	regasm.exe
4264	regasm.exe
4264	regasm.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4456	039308d47114c1bc4976d88869edf65d7f0658cb11a9eca534123578219b8c6c.exe
Token: SeDebugPrivilege	4264	regasm.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2848	039308d47114c1bc4976d88869edf65d7f0658cb11a9eca534123578219b8c6c.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 4456 wrote to memory of 2848	4456	039308d47114c1bc4976d88869edf65d7f0658cb11a9eca534123578219b8c6c.exe	84
PID 4456 wrote to memory of 2848	4456	039308d47114c1bc4976d88869edf65d7f0658cb11a9eca534123578219b8c6c.exe	84
PID 4456 wrote to memory of 2848	4456	039308d47114c1bc4976d88869edf65d7f0658cb11a9eca534123578219b8c6c.exe	84
PID 4456 wrote to memory of 2848	4456	039308d47114c1bc4976d88869edf65d7f0658cb11a9eca534123578219b8c6c.exe	84
PID 4456 wrote to memory of 2848	4456	039308d47114c1bc4976d88869edf65d7f0658cb11a9eca534123578219b8c6c.exe	84
PID 4456 wrote to memory of 2848	4456	039308d47114c1bc4976d88869edf65d7f0658cb11a9eca534123578219b8c6c.exe	84
PID 4456 wrote to memory of 2848	4456	039308d47114c1bc4976d88869edf65d7f0658cb11a9eca534123578219b8c6c.exe	84
PID 4456 wrote to memory of 2848	4456	039308d47114c1bc4976d88869edf65d7f0658cb11a9eca534123578219b8c6c.exe	84
PID 4456 wrote to memory of 2848	4456	039308d47114c1bc4976d88869edf65d7f0658cb11a9eca534123578219b8c6c.exe	84
PID 4456 wrote to memory of 4264	4456	039308d47114c1bc4976d88869edf65d7f0658cb11a9eca534123578219b8c6c.exe	85
PID 4456 wrote to memory of 4264	4456	039308d47114c1bc4976d88869edf65d7f0658cb11a9eca534123578219b8c6c.exe	85
PID 4456 wrote to memory of 4264	4456	039308d47114c1bc4976d88869edf65d7f0658cb11a9eca534123578219b8c6c.exe	85
PID 4456 wrote to memory of 4264	4456	039308d47114c1bc4976d88869edf65d7f0658cb11a9eca534123578219b8c6c.exe	85
PID 4456 wrote to memory of 4264	4456	039308d47114c1bc4976d88869edf65d7f0658cb11a9eca534123578219b8c6c.exe	85
PID 4456 wrote to memory of 4264	4456	039308d47114c1bc4976d88869edf65d7f0658cb11a9eca534123578219b8c6c.exe	85
PID 4456 wrote to memory of 4264	4456	039308d47114c1bc4976d88869edf65d7f0658cb11a9eca534123578219b8c6c.exe	85
PID 4456 wrote to memory of 4264	4456	039308d47114c1bc4976d88869edf65d7f0658cb11a9eca534123578219b8c6c.exe	85

C:\Users\Admin\AppData\Local\Temp\039308d47114c1bc4976d88869edf65d7f0658cb11a9eca534123578219b8c6c.exe
"C:\Users\Admin\AppData\Local\Temp\039308d47114c1bc4976d88869edf65d7f0658cb11a9eca534123578219b8c6c.exe"
1⤵
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4456
- C:\Users\Admin\AppData\Local\Temp\039308d47114c1bc4976d88869edf65d7f0658cb11a9eca534123578219b8c6c.exe
  "C:\Users\Admin\AppData\Local\Temp\039308d47114c1bc4976d88869edf65d7f0658cb11a9eca534123578219b8c6c.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:2848
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\regasm.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\regasm.exe" C:\Users\Admin\AppData\Local\Temp\039308d47114c1bc4976d88869edf65d7f0658cb11a9eca534123578219b8c6c.exe 2848 54bdec4d6fd4410eb5befd55dc4d5447
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4264

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\enterprisesec.config.cch

Filesize
514B

MD5
53804df72766bcb16d9039995b68e4fd

SHA1
380aa1f64ac0e672eb7968ec8fd173fa7ac29089

SHA256
6bf8e10a40ef563553d15375b13d2295bf0722e9e094fd89fd687f16ff1e7597

SHA512
82ebe163e12360be2a3af777fed23e4ad4f91b90e06607b8bf64ae03c7d7a0431607fa53a78596f1612fa1afe13e1302b8a8a19d50f4bf9e53697a2554cc4d5c

Download Submit
memory/2848-13-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/2848-3-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/2848-7-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/2848-21-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/4264-5-0x0000000000400000-0x0000000000408000-memory.dmp

Filesize
32KB

Download
memory/4264-20-0x0000000074800000-0x0000000074DB1000-memory.dmp

Filesize
5.7MB

Download
memory/4264-18-0x0000000074802000-0x0000000074803000-memory.dmp

Filesize
4KB

Download
memory/4264-22-0x0000000074800000-0x0000000074DB1000-memory.dmp

Filesize
5.7MB

Download
memory/4456-2-0x0000000074800000-0x0000000074DB1000-memory.dmp

Filesize
5.7MB

Download
memory/4456-0-0x0000000074802000-0x0000000074803000-memory.dmp

Filesize
4KB

Download
memory/4456-1-0x0000000074800000-0x0000000074DB1000-memory.dmp

Filesize
5.7MB

Download
memory/4456-19-0x0000000074800000-0x0000000074DB1000-memory.dmp

Filesize
5.7MB

Download

Analysis

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