remcos | c1be767404a3d71717a54b01ebfa91ebff578dad8dd518a1a49012bcf012738e

Resubmissions

27/07/2024, 17:08

240727-vnrrpszapr 10

24/07/2024, 13:55

240724-q8e67aygrr 10

Analysis

max time kernel
143s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
24/07/2024, 13:55

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

725827cfa16ee9aa789f4cb0a7086dd4d6a5ab381461fa8ea0c95aac5a24b57b.exe
Size

138KB
MD5

f328e536916a2df28175ab0f152f8ad0
SHA1

69f18d725d693f7219b4701f2c3d334841c55179
SHA256

725827cfa16ee9aa789f4cb0a7086dd4d6a5ab381461fa8ea0c95aac5a24b57b
SHA512

e1671712a01799f479e15ec03c47ec979300322fe941128566cb3bf7b66314bbb76a54e15712b058d1706335ca7190bb952097398e04f26d31fe59aa5737b97e
SSDEEP

3072:xPd4n/M+WLcilrpgGH/GwY87mVmIXhIHc:xP6/M+WLckOBhVmIl

Score

10^/10

remcos host discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

systemcontrol.ddns.net:45000

systemcontrol2.ddns.net:45000

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
OfficeUpgrade.exe
copy_folder
OfficeUpgrade
delete_file
false
hide_file
true
hide_keylog_file
true
install_flag
false
install_path
%AppData%
keylog_crypt
true
keylog_file
Upgrader.dat
keylog_flag
false
keylog_folder
Upgrader
keylog_path
%AppData%
mouse_option
false
mutex
req_khauflaoyr
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screens
screenshot_path
%AppData%
screenshot_time
1
startup_value
OfficeUpgrade
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat 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-1-5-21-2990742725-2267136959-192470804-1000\Control Panel\International\Geo\Nation	725827cfa16ee9aa789f4cb0a7086dd4d6a5ab381461fa8ea0c95aac5a24b57b.exe

Executes dropped EXE 2 IoCs

pid	Process
4472	wn2ra4ohzdr.exe
3132	wn2ra4ohzdr.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2990742725-2267136959-192470804-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	725827cfa16ee9aa789f4cb0a7086dd4d6a5ab381461fa8ea0c95aac5a24b57b.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4472 set thread context of 3132	4472	wn2ra4ohzdr.exe	96

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	725827cfa16ee9aa789f4cb0a7086dd4d6a5ab381461fa8ea0c95aac5a24b57b.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wn2ra4ohzdr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wn2ra4ohzdr.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3132	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3256 wrote to memory of 4472	3256	725827cfa16ee9aa789f4cb0a7086dd4d6a5ab381461fa8ea0c95aac5a24b57b.exe	93
PID 3256 wrote to memory of 4472	3256	725827cfa16ee9aa789f4cb0a7086dd4d6a5ab381461fa8ea0c95aac5a24b57b.exe	93
PID 3256 wrote to memory of 4472	3256	725827cfa16ee9aa789f4cb0a7086dd4d6a5ab381461fa8ea0c95aac5a24b57b.exe	93
PID 4472 wrote to memory of 3132	4472	wn2ra4ohzdr.exe	96
PID 4472 wrote to memory of 3132	4472	wn2ra4ohzdr.exe	96
PID 4472 wrote to memory of 3132	4472	wn2ra4ohzdr.exe	96
PID 4472 wrote to memory of 3132	4472	wn2ra4ohzdr.exe	96
PID 4472 wrote to memory of 3132	4472	wn2ra4ohzdr.exe	96
PID 4472 wrote to memory of 3132	4472	wn2ra4ohzdr.exe	96
PID 4472 wrote to memory of 3132	4472	wn2ra4ohzdr.exe	96
PID 4472 wrote to memory of 3132	4472	wn2ra4ohzdr.exe	96
PID 4472 wrote to memory of 3132	4472	wn2ra4ohzdr.exe	96

C:\Users\Admin\AppData\Local\Temp\725827cfa16ee9aa789f4cb0a7086dd4d6a5ab381461fa8ea0c95aac5a24b57b.exe
"C:\Users\Admin\AppData\Local\Temp\725827cfa16ee9aa789f4cb0a7086dd4d6a5ab381461fa8ea0c95aac5a24b57b.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3256
- C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe
  "C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4472
- - C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe
    "C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:3132

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe

Filesize
138KB

MD5
91f79fb1962faf6d349c4c69e26a01d0

SHA1
9fdc29c5f53c4e6430e04ab3a6392654cbab900b

SHA256
512b3b4834e23512e939d5f1db12e4d842fbb6bfd5f97c1d871d223d0e944fb1

SHA512
1bc61d64f10aa34c2f975ed2e3e5f8c008ff34f0622cb2f6a76ae0017e7e927daecc67eb77ed555d619923c004dbf20ed0bb5c6ddda9685ac412314da04ca928

Download Submit
memory/3132-29-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3132-28-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3132-23-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3132-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3132-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3132-22-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3256-4-0x0000000005260000-0x000000000526A000-memory.dmp

Filesize
40KB

Download
memory/3256-6-0x00000000056F0000-0x0000000005710000-memory.dmp

Filesize
128KB

Download
memory/3256-5-0x0000000075230000-0x00000000759E0000-memory.dmp

Filesize
7.7MB

Download
memory/3256-0-0x000000007523E000-0x000000007523F000-memory.dmp

Filesize
4KB

Download
memory/3256-3-0x00000000052D0000-0x0000000005362000-memory.dmp

Filesize
584KB

Download
memory/3256-2-0x00000000057E0000-0x0000000005D84000-memory.dmp

Filesize
5.6MB

Download
memory/3256-1-0x0000000000830000-0x0000000000858000-memory.dmp

Filesize
160KB

Download
memory/3256-32-0x0000000075230000-0x00000000759E0000-memory.dmp

Filesize
7.7MB

Download
memory/4472-20-0x0000000075230000-0x00000000759E0000-memory.dmp

Filesize
7.7MB

Download
memory/4472-21-0x0000000075230000-0x00000000759E0000-memory.dmp

Filesize
7.7MB

Download
memory/4472-34-0x0000000075230000-0x00000000759E0000-memory.dmp

Filesize
7.7MB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads