remcos | 786ef7c2097911d84c31b1e866a6fbe8b7b5034d2d75beb85df954b6279696e3

General

Target

786ef7c2097911d84c31b1e866a6fbe8b7b5034d2d75beb85df954b6279696e3N.exe
Size

134KB
MD5

5c1382e0170470f80bfffe1b4d554f90
SHA1

1640b17db6aa327a3665d7d4492ca3978e862de4
SHA256

786ef7c2097911d84c31b1e866a6fbe8b7b5034d2d75beb85df954b6279696e3
SHA512

cf280449249fa5ddf8001a25764eb22fae5ff8fe9ce7b0ccc091633b70887abed10b18c7ba3740f2b058cd0cf0316a169a0484b349b849ba4b8141d85460eddf
SSDEEP

3072:xPd4n/M+WLcilrpgGH/GwY87mVmIXarME:xP6/M+WLckOBhVmIqrME

Score

10^/10

remcos host discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

C2

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
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-1-5-21-3218366390-1258052702-4267193707-1000\Control Panel\International\Geo\Nation	786ef7c2097911d84c31b1e866a6fbe8b7b5034d2d75beb85df954b6279696e3N.exe

Executes dropped EXE 2 IoCs

pid	Process
3432	wn2ra4ohzdr.exe
4448	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-1-5-21-3218366390-1258052702-4267193707-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	786ef7c2097911d84c31b1e866a6fbe8b7b5034d2d75beb85df954b6279696e3N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3432 set thread context of 4448	3432	wn2ra4ohzdr.exe	98

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	786ef7c2097911d84c31b1e866a6fbe8b7b5034d2d75beb85df954b6279696e3N.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
4448	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4052 wrote to memory of 3432	4052	786ef7c2097911d84c31b1e866a6fbe8b7b5034d2d75beb85df954b6279696e3N.exe	95
PID 4052 wrote to memory of 3432	4052	786ef7c2097911d84c31b1e866a6fbe8b7b5034d2d75beb85df954b6279696e3N.exe	95
PID 4052 wrote to memory of 3432	4052	786ef7c2097911d84c31b1e866a6fbe8b7b5034d2d75beb85df954b6279696e3N.exe	95
PID 3432 wrote to memory of 4448	3432	wn2ra4ohzdr.exe	98
PID 3432 wrote to memory of 4448	3432	wn2ra4ohzdr.exe	98
PID 3432 wrote to memory of 4448	3432	wn2ra4ohzdr.exe	98
PID 3432 wrote to memory of 4448	3432	wn2ra4ohzdr.exe	98
PID 3432 wrote to memory of 4448	3432	wn2ra4ohzdr.exe	98
PID 3432 wrote to memory of 4448	3432	wn2ra4ohzdr.exe	98
PID 3432 wrote to memory of 4448	3432	wn2ra4ohzdr.exe	98
PID 3432 wrote to memory of 4448	3432	wn2ra4ohzdr.exe	98
PID 3432 wrote to memory of 4448	3432	wn2ra4ohzdr.exe	98

C:\Users\Admin\AppData\Local\Temp\786ef7c2097911d84c31b1e866a6fbe8b7b5034d2d75beb85df954b6279696e3N.exe
"C:\Users\Admin\AppData\Local\Temp\786ef7c2097911d84c31b1e866a6fbe8b7b5034d2d75beb85df954b6279696e3N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4052
- 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:3432
- - 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:4448

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

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\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe

Filesize
134KB

MD5
b6558c457f020239f61fa75b7cab9dc9

SHA1
d96ee9ecf9f3cde2544fbddb4c3a6da90e67efaa

SHA256
3877756e0566da52121362723d81c002bcc19c41f87bd118d818d730baf08c6f

SHA512
9d21b98a33e25eed026b21a4e5773406d6860bd0dfbed730db0c0f55e3d0135d821df733479fbc22c29388a805e47f57fd05ea9fcedd68906ed862704ae903ef

Download Submit
memory/3432-36-0x0000000075110000-0x00000000758C0000-memory.dmp

Filesize
7.7MB

Download
memory/3432-34-0x0000000075110000-0x00000000758C0000-memory.dmp

Filesize
7.7MB

Download
memory/3432-23-0x0000000075110000-0x00000000758C0000-memory.dmp

Filesize
7.7MB

Download
memory/3432-21-0x0000000075110000-0x00000000758C0000-memory.dmp

Filesize
7.7MB

Download
memory/4052-22-0x0000000075110000-0x00000000758C0000-memory.dmp

Filesize
7.7MB

Download
memory/4052-2-0x0000000005940000-0x0000000005EE4000-memory.dmp

Filesize
5.6MB

Download
memory/4052-5-0x0000000075110000-0x00000000758C0000-memory.dmp

Filesize
7.7MB

Download
memory/4052-19-0x000000007511E000-0x000000007511F000-memory.dmp

Filesize
4KB

Download
memory/4052-4-0x0000000005340000-0x000000000534A000-memory.dmp

Filesize
40KB

Download
memory/4052-0-0x000000007511E000-0x000000007511F000-memory.dmp

Filesize
4KB

Download
memory/4052-3-0x00000000052A0000-0x0000000005332000-memory.dmp

Filesize
584KB

Download
memory/4052-6-0x0000000005510000-0x0000000005530000-memory.dmp

Filesize
128KB

Download
memory/4052-1-0x0000000000880000-0x00000000008A8000-memory.dmp

Filesize
160KB

Download
memory/4448-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4448-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4448-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4448-31-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4448-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4448-27-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads