remcos | 4931d0c2ab9e3a7badf139fdbfb722b4a75341052bbee19ecdddda032761b4a8

General

Target

4931d0c2ab9e3a7badf139fdbfb722b4a75341052bbee19ecdddda032761b4a8N.exe
Size

140KB
MD5

aea7686c67a518cb6df8cf4e41156190
SHA1

89162a9fd63cc78643b97854ea7237fea5bb383d
SHA256

4931d0c2ab9e3a7badf139fdbfb722b4a75341052bbee19ecdddda032761b4a8
SHA512

b9b9daa4a5467c2117cb95ee980455ec382ee75b90999fed6ae90692f43b55159f4f8185d3b56acc6b2c5c13ce00ed519a8cb6418acef3a896915fc0e45162a8
SSDEEP

3072:xPd4n/M+WLcilrpgGH/GwY87mVmIXhIHVT:xP6/M+WLckOBhVmIYT

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

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-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	4931d0c2ab9e3a7badf139fdbfb722b4a75341052bbee19ecdddda032761b4a8N.exe

Executes dropped EXE 2 IoCs

pid	Process
3276	wn2ra4ohzdr.exe
2100	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-1-5-21-940901362-3608833189-1915618603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	4931d0c2ab9e3a7badf139fdbfb722b4a75341052bbee19ecdddda032761b4a8N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3276 set thread context of 2100	3276	wn2ra4ohzdr.exe	99

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	4931d0c2ab9e3a7badf139fdbfb722b4a75341052bbee19ecdddda032761b4a8N.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
2100	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1196 wrote to memory of 3276	1196	4931d0c2ab9e3a7badf139fdbfb722b4a75341052bbee19ecdddda032761b4a8N.exe	94
PID 1196 wrote to memory of 3276	1196	4931d0c2ab9e3a7badf139fdbfb722b4a75341052bbee19ecdddda032761b4a8N.exe	94
PID 1196 wrote to memory of 3276	1196	4931d0c2ab9e3a7badf139fdbfb722b4a75341052bbee19ecdddda032761b4a8N.exe	94
PID 3276 wrote to memory of 2100	3276	wn2ra4ohzdr.exe	99
PID 3276 wrote to memory of 2100	3276	wn2ra4ohzdr.exe	99
PID 3276 wrote to memory of 2100	3276	wn2ra4ohzdr.exe	99
PID 3276 wrote to memory of 2100	3276	wn2ra4ohzdr.exe	99
PID 3276 wrote to memory of 2100	3276	wn2ra4ohzdr.exe	99
PID 3276 wrote to memory of 2100	3276	wn2ra4ohzdr.exe	99
PID 3276 wrote to memory of 2100	3276	wn2ra4ohzdr.exe	99
PID 3276 wrote to memory of 2100	3276	wn2ra4ohzdr.exe	99
PID 3276 wrote to memory of 2100	3276	wn2ra4ohzdr.exe	99

C:\Users\Admin\AppData\Local\Temp\4931d0c2ab9e3a7badf139fdbfb722b4a75341052bbee19ecdddda032761b4a8N.exe
"C:\Users\Admin\AppData\Local\Temp\4931d0c2ab9e3a7badf139fdbfb722b4a75341052bbee19ecdddda032761b4a8N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1196
- 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:3276
- - 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:2100

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
140KB

MD5
336639700d5a62c5789f782cbca5374f

SHA1
022cabc5477a30d5936864a84c83f29631618994

SHA256
62c1ab55b1c027029abb8cb51a789e669be0aa24dc2f390452ca15892e9d000e

SHA512
5d525e1c2ae099a111b7e5922a3b530dc05b6aaf5d1fd0d515e64adaf88d81bfdb109ba4c1e8d25058096be9f25e0947128413989b334c5aced49cff05329b89

Download Submit
memory/1196-0-0x0000000074DDE000-0x0000000074DDF000-memory.dmp

Filesize
4KB

Download
memory/1196-1-0x0000000000B80000-0x0000000000BA8000-memory.dmp

Filesize
160KB

Download
memory/1196-2-0x0000000005A70000-0x0000000006014000-memory.dmp

Filesize
5.6MB

Download
memory/1196-3-0x00000000055A0000-0x0000000005632000-memory.dmp

Filesize
584KB

Download
memory/1196-4-0x0000000005750000-0x000000000575A000-memory.dmp

Filesize
40KB

Download
memory/1196-5-0x0000000074DD0000-0x0000000075580000-memory.dmp

Filesize
7.7MB

Download
memory/1196-6-0x0000000005A40000-0x0000000005A60000-memory.dmp

Filesize
128KB

Download
memory/1196-20-0x0000000074DDE000-0x0000000074DDF000-memory.dmp

Filesize
4KB

Download
memory/1196-21-0x0000000074DD0000-0x0000000075580000-memory.dmp

Filesize
7.7MB

Download
memory/2100-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2100-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2100-27-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2100-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2100-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2100-31-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3276-23-0x0000000074DD0000-0x0000000075580000-memory.dmp

Filesize
7.7MB

Download
memory/3276-22-0x0000000074DD0000-0x0000000075580000-memory.dmp

Filesize
7.7MB

Download
memory/3276-34-0x0000000074DD0000-0x0000000075580000-memory.dmp

Filesize
7.7MB

Download
memory/3276-36-0x0000000074DD0000-0x0000000075580000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads