remcos | 87e1bcc31d4b6a673207b37b094b4c6f4a0a4a8588d19f706fe0f03b6154318e

General

Target

3677fed428584fc3d50c173b08322f6bda93e962d60e9ec5a0af360214ce12dd.exe
Size

792KB
MD5

4ce5a53d8c401c45a78bfdb3cd4e110a
SHA1

1b9299cf708e8fbe9cf037581595d1e0d84140fe
SHA256

3677fed428584fc3d50c173b08322f6bda93e962d60e9ec5a0af360214ce12dd
SHA512

e7abff84d6a5d4797f3a62e3dcf63d40d742c4761a6a39804f22f455e8fe8647392238b37041bea824ba310f4cc6c0f0d2ba65a18545659c3b61a877f834b89e
SSDEEP

12288:+iHKAUxid0pt2Gloj8MrVE6YASEldYbRugxEHqZ7bsPaL/bOpYtYRpc7AODkZzK+:+iH7UxOg9aj1rYD

Score

10^/10

remcos torrecuatro discovery rat

Malware Config

Extracted

Family

remcos

Version

2.5.0 Pro

Botnet

TORRECUATRO

C2

torrecuatroremser.duckdns.org:1013

Attributes

audio_folder
MicRecords
audio_path
%AppData%
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
false
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-C9IGV5
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
remcos
take_screenshot_option
false
take_screenshot_time
5
take_screenshot_title
wikipedia;solitaire;

Signatures

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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	3677fed428584fc3d50c173b08322f6bda93e962d60e9ec5a0af360214ce12dd.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2420 set thread context of 2964	2420	3677fed428584fc3d50c173b08322f6bda93e962d60e9ec5a0af360214ce12dd.exe	99

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegSvcs.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3677fed428584fc3d50c173b08322f6bda93e962d60e9ec5a0af360214ce12dd.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
3476	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2420	3677fed428584fc3d50c173b08322f6bda93e962d60e9ec5a0af360214ce12dd.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2420	3677fed428584fc3d50c173b08322f6bda93e962d60e9ec5a0af360214ce12dd.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2964	RegSvcs.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 2420 wrote to memory of 3476	2420	3677fed428584fc3d50c173b08322f6bda93e962d60e9ec5a0af360214ce12dd.exe	97
PID 2420 wrote to memory of 3476	2420	3677fed428584fc3d50c173b08322f6bda93e962d60e9ec5a0af360214ce12dd.exe	97
PID 2420 wrote to memory of 3476	2420	3677fed428584fc3d50c173b08322f6bda93e962d60e9ec5a0af360214ce12dd.exe	97
PID 2420 wrote to memory of 2964	2420	3677fed428584fc3d50c173b08322f6bda93e962d60e9ec5a0af360214ce12dd.exe	99
PID 2420 wrote to memory of 2964	2420	3677fed428584fc3d50c173b08322f6bda93e962d60e9ec5a0af360214ce12dd.exe	99
PID 2420 wrote to memory of 2964	2420	3677fed428584fc3d50c173b08322f6bda93e962d60e9ec5a0af360214ce12dd.exe	99
PID 2420 wrote to memory of 2964	2420	3677fed428584fc3d50c173b08322f6bda93e962d60e9ec5a0af360214ce12dd.exe	99
PID 2420 wrote to memory of 2964	2420	3677fed428584fc3d50c173b08322f6bda93e962d60e9ec5a0af360214ce12dd.exe	99
PID 2420 wrote to memory of 2964	2420	3677fed428584fc3d50c173b08322f6bda93e962d60e9ec5a0af360214ce12dd.exe	99
PID 2420 wrote to memory of 2964	2420	3677fed428584fc3d50c173b08322f6bda93e962d60e9ec5a0af360214ce12dd.exe	99
PID 2420 wrote to memory of 2964	2420	3677fed428584fc3d50c173b08322f6bda93e962d60e9ec5a0af360214ce12dd.exe	99
PID 2420 wrote to memory of 2964	2420	3677fed428584fc3d50c173b08322f6bda93e962d60e9ec5a0af360214ce12dd.exe	99
PID 2420 wrote to memory of 2964	2420	3677fed428584fc3d50c173b08322f6bda93e962d60e9ec5a0af360214ce12dd.exe	99

C:\Users\Admin\AppData\Local\Temp\3677fed428584fc3d50c173b08322f6bda93e962d60e9ec5a0af360214ce12dd.exe
"C:\Users\Admin\AppData\Local\Temp\3677fed428584fc3d50c173b08322f6bda93e962d60e9ec5a0af360214ce12dd.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2420
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\UjkynJXA" /XML "C:\Users\Admin\AppData\Local\Temp\tmp1A88.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:3476
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "{path}"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:2964

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

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:\Users\Admin\AppData\Local\Temp\tmp1A88.tmp

Filesize
1KB

MD5
54101f5f0c69ec3227a8cfc64b8191b6

SHA1
0c135a843f03240511dc96a774c1df7853069cb3

SHA256
5ba5b58eb131d6b9491dc09aa857a27255b10b14091596e9e973ef85ddf9341f

SHA512
2a7559d1836faebfb7aef2cf4ad1d46ca5877cd0df8daa9e357c9ade7360199d1af280494e61158b354875ec6a3bf3f18d36d60f4df664f2cded90ff703d07e6

Download Submit
C:\Users\Admin\AppData\Roaming\remcos\logs.dat

Filesize
74B

MD5
863c5d33da5bb75c8ab0f7883b870058

SHA1
acdd890d5c9e0bd3ea5b56d78d90130e875925af

SHA256
ed58673d808545b8b95cb4cc6e3db572be12fa716f7ef3e0843d0b3efef2d8b7

SHA512
57e501cd56c55a25c726af9d631fd766bc6a08b2c4a24ede49371900e8b18092d56b93f94c5f832f4e856eae8682cee2a73c240478c3936caa26686f3579ea0c

Download Submit
memory/2420-10-0x0000000074C90000-0x0000000075440000-memory.dmp

Filesize
7.7MB

Download
memory/2420-11-0x0000000006420000-0x0000000006494000-memory.dmp

Filesize
464KB

Download
memory/2420-4-0x0000000005010000-0x00000000050A2000-memory.dmp

Filesize
584KB

Download
memory/2420-5-0x0000000004F50000-0x0000000004F5A000-memory.dmp

Filesize
40KB

Download
memory/2420-6-0x0000000005200000-0x0000000005256000-memory.dmp

Filesize
344KB

Download
memory/2420-7-0x0000000074C90000-0x0000000075440000-memory.dmp

Filesize
7.7MB

Download
memory/2420-8-0x00000000055A0000-0x00000000055B4000-memory.dmp

Filesize
80KB

Download
memory/2420-9-0x0000000074C9E000-0x0000000074C9F000-memory.dmp

Filesize
4KB

Download
memory/2420-0-0x0000000074C9E000-0x0000000074C9F000-memory.dmp

Filesize
4KB

Download
memory/2420-3-0x00000000055C0000-0x0000000005B64000-memory.dmp

Filesize
5.6MB

Download
memory/2420-12-0x00000000065D0000-0x00000000065F6000-memory.dmp

Filesize
152KB

Download
memory/2420-2-0x0000000004F70000-0x000000000500C000-memory.dmp

Filesize
624KB

Download
memory/2420-1-0x00000000005C0000-0x000000000068C000-memory.dmp

Filesize
816KB

Download
memory/2420-25-0x0000000074C90000-0x0000000075440000-memory.dmp

Filesize
7.7MB

Download
memory/2964-24-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2964-23-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2964-19-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2964-20-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2964-27-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2964-16-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads