remcos | 0ca989caf3674f15e7072c37e9c89c48cef3500f0f02bc1f3786f71625869c1a

General

Target

libvlc.dll
Size

10.2MB
MD5

98b96b0a8f184734a3917fc603551a05
SHA1

18c64aad9d3f14d3358c8e02818678df9930cfe9
SHA256

9f5ff22c8e79d8a394a3a65afcc3b87738ac0f655e59ee93ac25fbad287a58d0
SHA512

dc5739855c11226e1ddcd47c5f4e450b5bbe44c53066722d7fa0b817324ac5549fdaf931d3d24d9a6f5ea405e2e2bcadbbb3c001d73eb938a5ce2168d3329ec2
SSDEEP

98304:8c8Pcsy8gpn4g2WjHNDw7uQKKlQRIwUm7ALYl7:gPcugp4EDuuQKKiRqSALY9

Score

10^/10

remcos fileooo discovery rat

Malware Config

Extracted

Family

remcos

Botnet

fileooo

C2

188.127.225.33:5637

Attributes

audio_folder
MicRecords
audio_path
ApplicationPath
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
65-VD9T89
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
Remcos family
remcos

Downloads MZ/PE file 1 IoCs

flow	pid	Process
28	1272	Process not Found

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 368 set thread context of 3960	368	rundll32.exe	86

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	aspnet_wp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MicrosoftEdgeUpdate.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
1404	MicrosoftEdgeUpdate.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 368 wrote to memory of 3960	368	rundll32.exe	86
PID 368 wrote to memory of 3960	368	rundll32.exe	86
PID 368 wrote to memory of 3960	368	rundll32.exe	86
PID 368 wrote to memory of 3960	368	rundll32.exe	86
PID 368 wrote to memory of 3960	368	rundll32.exe	86
PID 368 wrote to memory of 3960	368	rundll32.exe	86
PID 368 wrote to memory of 3960	368	rundll32.exe	86
PID 368 wrote to memory of 3960	368	rundll32.exe	86
PID 368 wrote to memory of 3960	368	rundll32.exe	86
PID 368 wrote to memory of 3960	368	rundll32.exe	86

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\libvlc.dll,#1
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:368
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_wp.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_wp.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3960

C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
"C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-PGFwcCBhcHBpZD0iezhBNjlEMzQ1LUQ1NjQtNDYzYy1BRkYxLUE2OUQ5RTUzMEY5Nn0iIHZlcnNpb249IjEyMy4wLjYzMTIuMTIzIiBuZXh0dmVyc2lvbj0iIiBsYW5nPSJlbiIgYnJhbmQ9IkdHTFMiIGNsaWVudD0iIiBpbnN0YWxsYWdlPSIzIiBpbnN0YWxsZGF0ZXRpbWU9IjE3Mzg5NDY0MzMiIG9vYmVfaW5zdGFsbF90aW1lPSIxMzM4MzQxODc1OTU2NTAwMDAiPjxldmVudCBldmVudHR5cGU9IjMxIiBldmVudHJlc3VsdD0iMSIgZXJyb3Jjb2RlPSIwIiBleHRyYWNvZGUxPSIyMTc5ODYyIiBzeXN0ZW1fdXB0aW1lX3RpY2tzPSI1MDMzNzI1MjQwIi8-PC9hcHA-PC9yZXF1ZXN0Pg
1⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
PID:1404

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

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/3960-0-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/3960-1-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/3960-2-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/3960-5-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/3960-4-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/3960-3-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/3960-6-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/3960-7-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/3960-8-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/3960-10-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/3960-11-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/3960-12-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/3960-13-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/3960-15-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/3960-16-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/3960-18-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/3960-17-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/3960-19-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/3960-20-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/3960-21-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/3960-22-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download

Analysis

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