remcos | 14fa988747a313c09bbc60596d4262c1a8bd653cf982acc836b056d545323e66

General

Target

2i8muV3YUdasYZi.exe
Size

957KB
MD5

503634aab271a373dc2aa561c3f41c9f
SHA1

5a69b7351c1ab3b10f440e8e4f85476269e908d8
SHA256

e91003d89bef3f5c6bdfb6a554ca0cf7e05d209cf0184cb545f84ce1a3d04159
SHA512

8e59d88e95b7f601224dbc8d3b8a3c06eb899ec96d6c84479e3c618173d3e14e2f691c908f530447d87c7e17dbbad1ce259f579401272b77b84bbdaddb234697
SSDEEP

24576:Mq6EOjecgRrD6qTc8ZNUgJbejCwJsKx7X:MqtO6VDy8TUljxqKxT

Score

10^/10

remcos splendid discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

splendid

C2

wasxc.ddns.net:5809

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-GQQEAY
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2232	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2868 set thread context of 2596	2868	2i8muV3YUdasYZi.exe	32

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	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2i8muV3YUdasYZi.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2i8muV3YUdasYZi.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2232	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2232	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2596	2i8muV3YUdasYZi.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 2868 wrote to memory of 2232	2868	2i8muV3YUdasYZi.exe	30
PID 2868 wrote to memory of 2232	2868	2i8muV3YUdasYZi.exe	30
PID 2868 wrote to memory of 2232	2868	2i8muV3YUdasYZi.exe	30
PID 2868 wrote to memory of 2232	2868	2i8muV3YUdasYZi.exe	30
PID 2868 wrote to memory of 2596	2868	2i8muV3YUdasYZi.exe	32
PID 2868 wrote to memory of 2596	2868	2i8muV3YUdasYZi.exe	32
PID 2868 wrote to memory of 2596	2868	2i8muV3YUdasYZi.exe	32
PID 2868 wrote to memory of 2596	2868	2i8muV3YUdasYZi.exe	32
PID 2868 wrote to memory of 2596	2868	2i8muV3YUdasYZi.exe	32
PID 2868 wrote to memory of 2596	2868	2i8muV3YUdasYZi.exe	32
PID 2868 wrote to memory of 2596	2868	2i8muV3YUdasYZi.exe	32
PID 2868 wrote to memory of 2596	2868	2i8muV3YUdasYZi.exe	32
PID 2868 wrote to memory of 2596	2868	2i8muV3YUdasYZi.exe	32
PID 2868 wrote to memory of 2596	2868	2i8muV3YUdasYZi.exe	32
PID 2868 wrote to memory of 2596	2868	2i8muV3YUdasYZi.exe	32
PID 2868 wrote to memory of 2596	2868	2i8muV3YUdasYZi.exe	32
PID 2868 wrote to memory of 2596	2868	2i8muV3YUdasYZi.exe	32

C:\Users\Admin\AppData\Local\Temp\2i8muV3YUdasYZi.exe
"C:\Users\Admin\AppData\Local\Temp\2i8muV3YUdasYZi.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2868
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\2i8muV3YUdasYZi.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2232
- C:\Users\Admin\AppData\Local\Temp\2i8muV3YUdasYZi.exe
  "C:\Users\Admin\AppData\Local\Temp\2i8muV3YUdasYZi.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:2596

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
97184dfb9fbe818b609299cbb66987ed

SHA1
1b313e3b369783a6a9261cb6438d882ac39a9a7a

SHA256
46b4eda6d639c2d85c3ded40d54694b3c873bc950c59409b0dd23d36884ce67d

SHA512
8310dd271598b6a84ea4f94e5f641a8e45e728525a5a173d18e7542366768cb0a7ee46cd9c2cd288c7dea3494cac640a4e44d865abc4a4c04a6273522ed9ff5e

Download Submit
memory/2596-9-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2596-26-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2596-63-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2596-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2596-64-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2596-55-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2596-23-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2596-8-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2596-29-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2596-21-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2596-19-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2596-17-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2596-16-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2596-7-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2596-12-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2596-56-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2596-48-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2596-47-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2596-13-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2596-40-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2596-31-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2596-34-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2596-35-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2596-36-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2596-39-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2868-30-0x00000000740D0000-0x00000000747BE000-memory.dmp

Filesize
6.9MB

Download
memory/2868-1-0x0000000000F70000-0x0000000001062000-memory.dmp

Filesize
968KB

Download
memory/2868-2-0x00000000740D0000-0x00000000747BE000-memory.dmp

Filesize
6.9MB

Download
memory/2868-4-0x00000000740DE000-0x00000000740DF000-memory.dmp

Filesize
4KB

Download
memory/2868-0-0x00000000740DE000-0x00000000740DF000-memory.dmp

Filesize
4KB

Download
memory/2868-6-0x0000000005530000-0x00000000055F0000-memory.dmp

Filesize
768KB

Download
memory/2868-5-0x00000000740D0000-0x00000000747BE000-memory.dmp

Filesize
6.9MB

Download
memory/2868-3-0x00000000004F0000-0x0000000000508000-memory.dmp

Filesize
96KB

Download

Analysis

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