remcos | 212a56150b50e4bb9b18a8b6c10e2f0b0c18f6d74cb6d41065f8fee0fe2bd39c

Analysis

max time kernel
149s
max time network
149s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-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 7 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2608-29-0x0000000000400000-0x0000000000417000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
behavioral1/memory/2608-35-0x0000000000400000-0x0000000000417000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
behavioral1/memory/2608-26-0x0000000000400000-0x0000000000417000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
behavioral1/memory/2608-23-0x0000000000400000-0x0000000000417000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
behavioral1/memory/2608-36-0x0000000000400000-0x0000000000417000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
behavioral1/memory/2608-39-0x0000000000400000-0x0000000000417000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
behavioral1/memory/2608-43-0x0000000000400000-0x0000000000417000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer

Executes dropped EXE 2 IoCs

Processes:

wn2ra4ohzdr.exewn2ra4ohzdr.exe

pid process

2756 wn2ra4ohzdr.exe
2608 wn2ra4ohzdr.exe
Loads dropped DLL 1 IoCs

Processes:

212a56150b50e4bb9b18a8b6c10e2f0b0c18f6d74cb6d41065f8fee0fe2bd39c.exe

pid process

2252 212a56150b50e4bb9b18a8b6c10e2f0b0c18f6d74cb6d41065f8fee0fe2bd39c.exe

pid	process
2756	wn2ra4ohzdr.exe
2608	wn2ra4ohzdr.exe

pid	process
2252	212a56150b50e4bb9b18a8b6c10e2f0b0c18f6d74cb6d41065f8fee0fe2bd39c.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-1-5-21-2721934792-624042501-2768869379-1000\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 2756 set thread context of 2608 2756 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

2608 wn2ra4ohzdr.exe

description	pid	process	target process
PID 2756 set thread context of 2608	2756	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe

pid	process
2608	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

212a56150b50e4bb9b18a8b6c10e2f0b0c18f6d74cb6d41065f8fee0fe2bd39c.exewn2ra4ohzdr.exe

description	pid	process	target process
PID 2252 wrote to memory of 2756	2252	212a56150b50e4bb9b18a8b6c10e2f0b0c18f6d74cb6d41065f8fee0fe2bd39c.exe	wn2ra4ohzdr.exe
PID 2252 wrote to memory of 2756	2252	212a56150b50e4bb9b18a8b6c10e2f0b0c18f6d74cb6d41065f8fee0fe2bd39c.exe	wn2ra4ohzdr.exe
PID 2252 wrote to memory of 2756	2252	212a56150b50e4bb9b18a8b6c10e2f0b0c18f6d74cb6d41065f8fee0fe2bd39c.exe	wn2ra4ohzdr.exe
PID 2252 wrote to memory of 2756	2252	212a56150b50e4bb9b18a8b6c10e2f0b0c18f6d74cb6d41065f8fee0fe2bd39c.exe	wn2ra4ohzdr.exe
PID 2756 wrote to memory of 2608	2756	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 2756 wrote to memory of 2608	2756	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 2756 wrote to memory of 2608	2756	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 2756 wrote to memory of 2608	2756	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 2756 wrote to memory of 2608	2756	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 2756 wrote to memory of 2608	2756	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 2756 wrote to memory of 2608	2756	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 2756 wrote to memory of 2608	2756	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 2756 wrote to memory of 2608	2756	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 2756 wrote to memory of 2608	2756	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe

C:\Users\Admin\AppData\Local\Temp\212a56150b50e4bb9b18a8b6c10e2f0b0c18f6d74cb6d41065f8fee0fe2bd39c.exe
"C:\Users\Admin\AppData\Local\Temp\212a56150b50e4bb9b18a8b6c10e2f0b0c18f6d74cb6d41065f8fee0fe2bd39c.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2252

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:2756

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:2608

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads

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

MD5
9ec3cacdee353f83e8165e1239d2a0f7

SHA1
cde028b533a8210daa80a9e61591be8bbc1ccf0e

SHA256
2b5a4b79bfaefb7e91252902a867ab0508038edef5ee71a4a48421fba64a24ed

SHA512
6c92981d5d3f891b9bd78e070061b91a93a69a6d2d2061cb3514bd93dd6ed82f550cdc46f05873beefac59230ddf9be209814ad0616c5ccfa6680f20c3316b13

Download Submit
memory/2252-12-0x0000000074900000-0x0000000074FEE000-memory.dmp

Filesize
6.9MB

Download
memory/2252-1-0x00000000012F0000-0x0000000001318000-memory.dmp

Filesize
160KB

Download
memory/2252-2-0x0000000074900000-0x0000000074FEE000-memory.dmp

Filesize
6.9MB

Download
memory/2252-3-0x0000000000590000-0x00000000005B0000-memory.dmp

Filesize
128KB

Download
memory/2252-0-0x000000007490E000-0x000000007490F000-memory.dmp

Filesize
4KB

Download
memory/2608-23-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2608-35-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2608-43-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2608-18-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2608-16-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2608-29-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2608-30-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2608-39-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2608-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2608-36-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2608-20-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2756-13-0x0000000001380000-0x00000000013A8000-memory.dmp

Filesize
160KB

Download
memory/2756-14-0x0000000074900000-0x0000000074FEE000-memory.dmp

Filesize
6.9MB

Download
memory/2756-40-0x0000000074900000-0x0000000074FEE000-memory.dmp

Filesize
6.9MB

Download
memory/2756-15-0x0000000074900000-0x0000000074FEE000-memory.dmp

Filesize
6.9MB

Download