remcos | bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13

General

Target

bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.exe
Size

971KB
MD5

7e0fb6d08352c44ae511b38003e9d852
SHA1

ecb7694e316c82d3cb91bd76aa395169f8345a27
SHA256

bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13
SHA512

83be71468976f320faa3cbb47afb71b796d32e53efeb009ea793d663280c4bb8fe735748bcb8e4556cc67664da9b2ec2cedb0a3514e2a5b928555ee4534b4802
SSDEEP

24576:lum6Hz4CHoQy8c6vIGhRAqYVw0On9y8Vo3/9V+M:lum68CFy8JI/Dw0Onse

Score

10^/10

remcos remotehost discovery rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

103.161.133.245:9898

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
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-LN5NIY
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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1484 set thread context of 4260	1484	bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.exe	94

System Location Discovery: System Language Discovery 1 TTPs 2 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	bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MSBuild.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1484 wrote to memory of 4260	1484	bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.exe	94
PID 1484 wrote to memory of 4260	1484	bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.exe	94
PID 1484 wrote to memory of 4260	1484	bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.exe	94
PID 1484 wrote to memory of 4260	1484	bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.exe	94
PID 1484 wrote to memory of 4260	1484	bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.exe	94
PID 1484 wrote to memory of 4260	1484	bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.exe	94
PID 1484 wrote to memory of 4260	1484	bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.exe	94
PID 1484 wrote to memory of 4260	1484	bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.exe	94
PID 1484 wrote to memory of 4260	1484	bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.exe	94
PID 1484 wrote to memory of 4260	1484	bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.exe	94
PID 1484 wrote to memory of 4260	1484	bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.exe	94
PID 1484 wrote to memory of 4260	1484	bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.exe	94

C:\Users\Admin\AppData\Local\Temp\bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.exe
"C:\Users\Admin\AppData\Local\Temp\bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1484
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4260

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

Replay Monitor

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Downloads

memory/1484-0-0x000000007514E000-0x000000007514F000-memory.dmp

Filesize
4KB

Download
memory/1484-1-0x0000000000150000-0x0000000000248000-memory.dmp

Filesize
992KB

Download
memory/1484-2-0x00000000052A0000-0x0000000005844000-memory.dmp

Filesize
5.6MB

Download
memory/1484-3-0x0000000004C30000-0x0000000004CC2000-memory.dmp

Filesize
584KB

Download
memory/1484-4-0x0000000075140000-0x00000000758F0000-memory.dmp

Filesize
7.7MB

Download
memory/1484-5-0x0000000004E00000-0x0000000004E0A000-memory.dmp

Filesize
40KB

Download
memory/1484-6-0x0000000006260000-0x0000000006348000-memory.dmp

Filesize
928KB

Download
memory/1484-7-0x0000000006380000-0x0000000006398000-memory.dmp

Filesize
96KB

Download
memory/1484-8-0x000000007514E000-0x000000007514F000-memory.dmp

Filesize
4KB

Download
memory/1484-9-0x0000000075140000-0x00000000758F0000-memory.dmp

Filesize
7.7MB

Download
memory/1484-10-0x0000000005E80000-0x0000000005F40000-memory.dmp

Filesize
768KB

Download
memory/1484-11-0x00000000087D0000-0x000000000886C000-memory.dmp

Filesize
624KB

Download
memory/1484-19-0x0000000075140000-0x00000000758F0000-memory.dmp

Filesize
7.7MB

Download
memory/4260-15-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4260-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4260-16-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4260-17-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4260-18-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4260-12-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4260-21-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4260-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4260-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4260-13-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4260-27-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4260-26-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4260-28-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4260-29-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4260-31-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4260-30-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4260-32-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4260-33-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download

Analysis

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