remcos | 212a56150b50e4bb9b18a8b6c10e2f0b0c18f6d74cb6d41065f8fee0fe2bd39c

Analysis

max time kernel
147s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
26-06-2024 19:07

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General

Target

212a56150b50e4bb9b18a8b6c10e2f0b0c18f6d74cb6d41065f8fee0fe2bd39c.exe
Size

137KB
MD5

7d421d9e6ce2288ccd3bf812e84e1958
SHA1

b68144ec39afef3248c53315379759b681918567
SHA256

212a56150b50e4bb9b18a8b6c10e2f0b0c18f6d74cb6d41065f8fee0fe2bd39c
SHA512

27df2876b389d0af3a8d2b35d23cf3ed648330c8fe181e25fd287cc84cf1295c821f3dd0ea494cb900606d18b45829cb086b7e07a3e977bbfdcd7ae815355cd0
SSDEEP

1536:ITHiPBX4nDzMyRXGHrc9YRHqbTypgpmb5Q+ZReSdhk/J+YLgD3mrxb53cSuYQjKg:xPd4n/M+WLcilrpgGH/GwY87mVmIXGD3

Score

10^/10

remcos host 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

detects Windows exceutables potentially bypassing UAC using eventvwr.exe 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3324-26-0x0000000000400000-0x0000000000417000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
behavioral2/memory/3324-25-0x0000000000400000-0x0000000000417000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
behavioral2/memory/3324-24-0x0000000000400000-0x0000000000417000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
behavioral2/memory/3324-30-0x0000000000400000-0x0000000000417000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
behavioral2/memory/3324-31-0x0000000000400000-0x0000000000417000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer

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

Processes:

212a56150b50e4bb9b18a8b6c10e2f0b0c18f6d74cb6d41065f8fee0fe2bd39c.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	212a56150b50e4bb9b18a8b6c10e2f0b0c18f6d74cb6d41065f8fee0fe2bd39c.exe

Executes dropped EXE 2 IoCs

Processes:

wn2ra4ohzdr.exewn2ra4ohzdr.exe

pid process

4220 wn2ra4ohzdr.exe
3324 wn2ra4ohzdr.exe

pid	process
4220	wn2ra4ohzdr.exe
3324	wn2ra4ohzdr.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

212a56150b50e4bb9b18a8b6c10e2f0b0c18f6d74cb6d41065f8fee0fe2bd39c.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	212a56150b50e4bb9b18a8b6c10e2f0b0c18f6d74cb6d41065f8fee0fe2bd39c.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

wn2ra4ohzdr.exe

description pid process target process

PID 4220 set thread context of 3324 4220 wn2ra4ohzdr.exe wn2ra4ohzdr.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

wn2ra4ohzdr.exe

pid process

3324 wn2ra4ohzdr.exe

description	pid	process	target process
PID 4220 set thread context of 3324	4220	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe

pid	process
3324	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

212a56150b50e4bb9b18a8b6c10e2f0b0c18f6d74cb6d41065f8fee0fe2bd39c.exewn2ra4ohzdr.exe

description	pid	process	target process
PID 1880 wrote to memory of 4220	1880	212a56150b50e4bb9b18a8b6c10e2f0b0c18f6d74cb6d41065f8fee0fe2bd39c.exe	wn2ra4ohzdr.exe
PID 1880 wrote to memory of 4220	1880	212a56150b50e4bb9b18a8b6c10e2f0b0c18f6d74cb6d41065f8fee0fe2bd39c.exe	wn2ra4ohzdr.exe
PID 1880 wrote to memory of 4220	1880	212a56150b50e4bb9b18a8b6c10e2f0b0c18f6d74cb6d41065f8fee0fe2bd39c.exe	wn2ra4ohzdr.exe
PID 4220 wrote to memory of 3324	4220	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 4220 wrote to memory of 3324	4220	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 4220 wrote to memory of 3324	4220	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 4220 wrote to memory of 3324	4220	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 4220 wrote to memory of 3324	4220	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 4220 wrote to memory of 3324	4220	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 4220 wrote to memory of 3324	4220	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 4220 wrote to memory of 3324	4220	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 4220 wrote to memory of 3324	4220	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe

C:\Users\Admin\AppData\Local\Temp\212a56150b50e4bb9b18a8b6c10e2f0b0c18f6d74cb6d41065f8fee0fe2bd39c.exe
"C:\Users\Admin\AppData\Local\Temp\212a56150b50e4bb9b18a8b6c10e2f0b0c18f6d74cb6d41065f8fee0fe2bd39c.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1880

C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe
"C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe"
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4220

C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe
"C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
PID:3324

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads

C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe
Filesize
137KB

MD5
9c8debc47b5225ca8b61ec10a9435792

SHA1
c1b17c2d86d3f16ebfc47a15dac64b82f7c630d4

SHA256
eddf521daa144bb79856445778ad8e2b5d4b625bb9956058e50bc936c08862ce

SHA512
3a67ed298d6612b6235a841ad8e5c81fb76bf23b1db51f1c21f5dc76eb811ac904e414b318c14408fc7345c0eb76535559385ba1400eaf4311c94b81de4a61a2

Download Submit
memory/1880-20-0x0000000075350000-0x0000000075B00000-memory.dmp

Filesize
7.7MB

Download
memory/1880-5-0x0000000075350000-0x0000000075B00000-memory.dmp

Filesize
7.7MB

Download
memory/1880-0-0x000000007535E000-0x000000007535F000-memory.dmp

Filesize
4KB

Download
memory/1880-4-0x00000000052D0000-0x00000000052DA000-memory.dmp

Filesize
40KB

Download
memory/1880-2-0x00000000058A0000-0x0000000005E44000-memory.dmp

Filesize
5.6MB

Download
memory/1880-6-0x0000000005870000-0x0000000005890000-memory.dmp

Filesize
128KB

Download
memory/1880-1-0x00000000008A0000-0x00000000008C8000-memory.dmp

Filesize
160KB

Download
memory/1880-3-0x00000000052F0000-0x0000000005382000-memory.dmp

Filesize
584KB

Download
memory/3324-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3324-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3324-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3324-23-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3324-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3324-31-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4220-22-0x0000000075350000-0x0000000075B00000-memory.dmp

Filesize
7.7MB

Download
memory/4220-21-0x0000000075350000-0x0000000075B00000-memory.dmp

Filesize
7.7MB

Download
memory/4220-37-0x0000000075350000-0x0000000075B00000-memory.dmp

Filesize
7.7MB

Download