remcos | be7e4571588825086418d3cd2c2edfe92d341da085e3817d8c11e841f109cf84

General

Target

Payment Advice BVA103635.exe
Size

9KB
MD5

658eed87f9710ebb2e7b971c7fe61f60
SHA1

5aadfc2a4f887e249324d87ce095b23eac859675
SHA256

be7e4571588825086418d3cd2c2edfe92d341da085e3817d8c11e841f109cf84
SHA512

a26011d3cb0ca38da09fc47111d12a9ed7f0aa5a046fd71238465a5e0e5b67d1eb1182537729084e159fed1690b6b14fc358617ece263eca1997870456c45f61
SSDEEP

96:jvGzJDlHGEH27f+HtrIWS75JY6D3WNtW1jYcFoNVcz1W4oKYMsLYUa:jiJZW7fSeWS751D8stYcFmVc03KY

Score

10^/10

remcos remotehost persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

185.216.71.62:46193

Attributes

audio_folder
MicRecords
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
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-EY1QD4
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

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-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	Payment Advice BVA103635.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-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Wyjjoyffpk = "\"C:\\Users\\Admin\\AppData\\Roaming\\Espggt\\Wyjjoyffpk.exe\""	Payment Advice BVA103635.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5048 set thread context of 4768	5048	Payment Advice BVA103635.exe	89

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
4180	powershell.exe
4180	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5048	Payment Advice BVA103635.exe
Token: SeDebugPrivilege	4180	powershell.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 5048 wrote to memory of 4180	5048	Payment Advice BVA103635.exe	80
PID 5048 wrote to memory of 4180	5048	Payment Advice BVA103635.exe	80
PID 5048 wrote to memory of 4180	5048	Payment Advice BVA103635.exe	80
PID 5048 wrote to memory of 4768	5048	Payment Advice BVA103635.exe	89
PID 5048 wrote to memory of 4768	5048	Payment Advice BVA103635.exe	89
PID 5048 wrote to memory of 4768	5048	Payment Advice BVA103635.exe	89
PID 5048 wrote to memory of 4768	5048	Payment Advice BVA103635.exe	89
PID 5048 wrote to memory of 4768	5048	Payment Advice BVA103635.exe	89
PID 5048 wrote to memory of 4768	5048	Payment Advice BVA103635.exe	89
PID 5048 wrote to memory of 4768	5048	Payment Advice BVA103635.exe	89
PID 5048 wrote to memory of 4768	5048	Payment Advice BVA103635.exe	89
PID 5048 wrote to memory of 4768	5048	Payment Advice BVA103635.exe	89
PID 5048 wrote to memory of 4768	5048	Payment Advice BVA103635.exe	89
PID 5048 wrote to memory of 4768	5048	Payment Advice BVA103635.exe	89
PID 5048 wrote to memory of 4768	5048	Payment Advice BVA103635.exe	89

C:\Users\Admin\AppData\Local\Temp\Payment Advice BVA103635.exe
"C:\Users\Admin\AppData\Local\Temp\Payment Advice BVA103635.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:5048
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAANQAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4180
- C:\Users\Admin\AppData\Local\Temp\Payment Advice BVA103635.exe
  "C:\Users\Admin\AppData\Local\Temp\Payment Advice BVA103635.exe"
  2⤵
  PID:4768

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/4180-140-0x0000000008020000-0x000000000869A000-memory.dmp

Filesize
6.5MB

Download
memory/4180-141-0x0000000006EA0000-0x0000000006EBA000-memory.dmp

Filesize
104KB

Download
memory/4180-135-0x00000000053D0000-0x0000000005406000-memory.dmp

Filesize
216KB

Download
memory/4180-136-0x0000000005AD0000-0x00000000060F8000-memory.dmp

Filesize
6.2MB

Download
memory/4180-137-0x00000000061D0000-0x0000000006236000-memory.dmp

Filesize
408KB

Download
memory/4180-138-0x0000000006370000-0x00000000063D6000-memory.dmp

Filesize
408KB

Download
memory/4180-139-0x00000000069B0000-0x00000000069CE000-memory.dmp

Filesize
120KB

Download
memory/4768-145-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4768-146-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4768-147-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4768-148-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4768-149-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/5048-142-0x00000000069A0000-0x0000000006A32000-memory.dmp

Filesize
584KB

Download
memory/5048-133-0x0000000006410000-0x0000000006432000-memory.dmp

Filesize
136KB

Download
memory/5048-143-0x000000002B310000-0x000000002B8B4000-memory.dmp

Filesize
5.6MB

Download
memory/5048-132-0x0000000000D30000-0x0000000000D38000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing