remcos | a83d25f3d81fad7452c41cfd2ae067dc47eeffa04b21d9fd515d0d95a6876eb9

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
08/02/2023, 14:26

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
Epiajhnsyxx.exe
Size 1.3MB
Sample230208-rrve8aba2v
SHA256 a83d25f3d81fad7452c41cfd2ae067dc47eeffa04b21d9fd515d0d95a6876eb9
MD5 c45fe13a7d5c10f240108d3786912fba
SHA1 697a6119f6dc5a6a31a88e43d21b1d09c82d55dd
SHA512 1238dde37093af5fa19f858ff92cd1cbf0b3e47e1e570d067253adf9c7acb5856ed09f797d7258fdaf3ccb4859ab8023c2b97379a274415125db10f5173ee2a1
SSDEEP 12288:hqgBqM4GDwz7FUNfIkCsBNokRolBYHnlV1NZu9+0Z2PCZGRsHjOZF0pSfTWcivYF:VV1N742goF0p
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos ossy persistence rat

Malware Config

Extracted

Family

remcos

Version

2.7.1 Pro

Botnet

OSSY

46.183.217.11:64702
127.0.0.1:64702
10.29.111.143:64702

Attributes

audio_folder
MicRecords
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-F2JHQU
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Remcos
take_screenshot_option
false
take_screenshot_time
5
take_screenshot_title
wikipedia;solitaire;

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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	Epiajhnsyxx.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Ppqxgs = "\"C:\\Users\\Admin\\AppData\\Roaming\\Chyxl\\Ppqxgs.exe\""	Epiajhnsyxx.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4876 set thread context of 4396	4876	Epiajhnsyxx.exe	83

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1984	powershell.exe
1984	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1984	powershell.exe
Token: SeDebugPrivilege	4876	Epiajhnsyxx.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 4876 wrote to memory of 1984	4876	Epiajhnsyxx.exe	81
PID 4876 wrote to memory of 1984	4876	Epiajhnsyxx.exe	81
PID 4876 wrote to memory of 1984	4876	Epiajhnsyxx.exe	81
PID 4876 wrote to memory of 4396	4876	Epiajhnsyxx.exe	83
PID 4876 wrote to memory of 4396	4876	Epiajhnsyxx.exe	83
PID 4876 wrote to memory of 4396	4876	Epiajhnsyxx.exe	83
PID 4876 wrote to memory of 4396	4876	Epiajhnsyxx.exe	83
PID 4876 wrote to memory of 4396	4876	Epiajhnsyxx.exe	83
PID 4876 wrote to memory of 4396	4876	Epiajhnsyxx.exe	83
PID 4876 wrote to memory of 4396	4876	Epiajhnsyxx.exe	83
PID 4876 wrote to memory of 4396	4876	Epiajhnsyxx.exe	83
PID 4876 wrote to memory of 4396	4876	Epiajhnsyxx.exe	83
PID 4876 wrote to memory of 4396	4876	Epiajhnsyxx.exe	83

C:\Users\Admin\AppData\Local\Temp\Epiajhnsyxx.exe
"C:\Users\Admin\AppData\Local\Temp\Epiajhnsyxx.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4876
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1984
- C:\Users\Admin\AppData\Local\Temp\Epiajhnsyxx.exe
  C:\Users\Admin\AppData\Local\Temp\Epiajhnsyxx.exe
  2⤵
  PID:4396

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/1984-138-0x0000000005C80000-0x0000000005CE6000-memory.dmp

Download

memory/1984-139-0x00000000062D0000-0x00000000062EE000-memory.dmp

Download

memory/1984-135-0x0000000002D00000-0x0000000002D36000-memory.dmp

Download

memory/1984-136-0x0000000005530000-0x0000000005B58000-memory.dmp

Download

memory/1984-137-0x0000000005C10000-0x0000000005C76000-memory.dmp

Download

memory/1984-140-0x0000000007B10000-0x000000000818A000-memory.dmp

Download

memory/1984-141-0x00000000067C0000-0x00000000067DA000-memory.dmp

Download

memory/4396-143-0x0000000000400000-0x0000000000421000-memory.dmp

Download

memory/4396-145-0x0000000000400000-0x0000000000421000-memory.dmp

Download

memory/4396-146-0x0000000000400000-0x0000000000421000-memory.dmp

Download

memory/4396-147-0x0000000000400000-0x0000000000421000-memory.dmp

Download

memory/4876-132-0x0000000000D20000-0x0000000000E72000-memory.dmp

Download

memory/4876-133-0x00000000058B0000-0x00000000058D2000-memory.dmp

Download