remcos | 38bf1b283154bc20e3812e560d75bc85baa3f74458a8577b570ba26f0637f2f7

General

Target

800399031-18.11.2024.pdf.exe
Size

1.0MB
MD5

54a5436bb5bf3977e98eda5ce6f8e8d2
SHA1

5aed6273fe965d5e0c41b0e934aa92099327e4da
SHA256

efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a
SHA512

0948ad9fb15f733c2a7df75f72da0dbd9a96e27b8228b11346c20fdcd0fc2888c634bc2ba5cb3ffd82c79190745ac7eba8f278d7036d79fa2cab6de8fc1f6ab9
SSDEEP

12288:FWCYKo7G7uh5W7R1c7MWLy5FbvG8bDzIMM3bGpsgUVEgcb8YaMCnHMybyac7nSZ7:FW+o7Co5Ww7Muyjbu4VlUVEtaMJZ7SZ

Score

10^/10

remcos host discovery rat

Malware Config

Extracted

Family

remcos

Botnet

Host

C2

oyo.work.gd:3142

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
vlc
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
keylog_crypt
true
keylog_file
logs.dat
keylog_flag
false
keylog_folder
pdf
mouse_option
false
mutex
jkm-I9KENP
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
ios
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 1 IoCs

description	pid	Process	procid_target
PID 4780 set thread context of 840	4780	800399031-18.11.2024.pdf.exe	96

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	800399031-18.11.2024.pdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	800399031-18.11.2024.pdf.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
840	800399031-18.11.2024.pdf.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4780 wrote to memory of 840	4780	800399031-18.11.2024.pdf.exe	96
PID 4780 wrote to memory of 840	4780	800399031-18.11.2024.pdf.exe	96
PID 4780 wrote to memory of 840	4780	800399031-18.11.2024.pdf.exe	96
PID 4780 wrote to memory of 840	4780	800399031-18.11.2024.pdf.exe	96
PID 4780 wrote to memory of 840	4780	800399031-18.11.2024.pdf.exe	96
PID 4780 wrote to memory of 840	4780	800399031-18.11.2024.pdf.exe	96
PID 4780 wrote to memory of 840	4780	800399031-18.11.2024.pdf.exe	96
PID 4780 wrote to memory of 840	4780	800399031-18.11.2024.pdf.exe	96
PID 4780 wrote to memory of 840	4780	800399031-18.11.2024.pdf.exe	96
PID 4780 wrote to memory of 840	4780	800399031-18.11.2024.pdf.exe	96
PID 4780 wrote to memory of 840	4780	800399031-18.11.2024.pdf.exe	96
PID 4780 wrote to memory of 840	4780	800399031-18.11.2024.pdf.exe	96

C:\Users\Admin\AppData\Local\Temp\800399031-18.11.2024.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\800399031-18.11.2024.pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4780
- C:\Users\Admin\AppData\Local\Temp\800399031-18.11.2024.pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\800399031-18.11.2024.pdf.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:840

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

C:\ProgramData\pdf\logs.dat

Filesize
144B

MD5
9113ede1f4b736a68fb2e42cda00003e

SHA1
23213dc92cd2091878ce67bb7c8d9f825949b956

SHA256
1eacfb7d9dbd940ccd208f5353cf2f70de4ef3f165c70e4738b3cefeb100353d

SHA512
d829b1eb425741634d82d6508467ba0940e8e9840d4d57614e4a83156de82c012c16d04cd1b653ab93085cbb645ac1f63650a78f1e191e457ea1f728976bfbad

Download Submit
memory/840-29-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/840-22-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/840-59-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/840-51-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/840-42-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/840-43-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/840-35-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/840-34-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/840-50-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/840-58-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/840-12-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/840-11-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/840-14-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/840-18-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/840-19-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/840-24-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/840-15-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/840-21-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/840-23-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4780-8-0x0000000005620000-0x0000000005632000-memory.dmp

Filesize
72KB

Download
memory/4780-20-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download
memory/4780-10-0x0000000006B80000-0x0000000006C40000-memory.dmp

Filesize
768KB

Download
memory/4780-9-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download
memory/4780-0-0x000000007522E000-0x000000007522F000-memory.dmp

Filesize
4KB

Download
memory/4780-7-0x000000007522E000-0x000000007522F000-memory.dmp

Filesize
4KB

Download
memory/4780-6-0x0000000005850000-0x00000000058EC000-memory.dmp

Filesize
624KB

Download
memory/4780-5-0x00000000053D0000-0x00000000053DA000-memory.dmp

Filesize
40KB

Download
memory/4780-4-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download
memory/4780-3-0x0000000005400000-0x0000000005492000-memory.dmp

Filesize
584KB

Download
memory/4780-2-0x0000000005910000-0x0000000005EB4000-memory.dmp

Filesize
5.6MB

Download
memory/4780-1-0x00000000008B0000-0x00000000009B4000-memory.dmp

Filesize
1.0MB

Download

Analysis

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