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
2852	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1972 set thread context of 2928	1972	2i8muV3YUdasYZi.exe	34

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

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1972	2i8muV3YUdasYZi.exe
1972	2i8muV3YUdasYZi.exe
2852	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1972	2i8muV3YUdasYZi.exe
Token: SeDebugPrivilege	2852	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2928	2i8muV3YUdasYZi.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1972 wrote to memory of 2852	1972	2i8muV3YUdasYZi.exe	31
PID 1972 wrote to memory of 2852	1972	2i8muV3YUdasYZi.exe	31
PID 1972 wrote to memory of 2852	1972	2i8muV3YUdasYZi.exe	31
PID 1972 wrote to memory of 2852	1972	2i8muV3YUdasYZi.exe	31
PID 1972 wrote to memory of 2456	1972	2i8muV3YUdasYZi.exe	33
PID 1972 wrote to memory of 2456	1972	2i8muV3YUdasYZi.exe	33
PID 1972 wrote to memory of 2456	1972	2i8muV3YUdasYZi.exe	33
PID 1972 wrote to memory of 2456	1972	2i8muV3YUdasYZi.exe	33
PID 1972 wrote to memory of 2928	1972	2i8muV3YUdasYZi.exe	34
PID 1972 wrote to memory of 2928	1972	2i8muV3YUdasYZi.exe	34
PID 1972 wrote to memory of 2928	1972	2i8muV3YUdasYZi.exe	34
PID 1972 wrote to memory of 2928	1972	2i8muV3YUdasYZi.exe	34
PID 1972 wrote to memory of 2928	1972	2i8muV3YUdasYZi.exe	34
PID 1972 wrote to memory of 2928	1972	2i8muV3YUdasYZi.exe	34
PID 1972 wrote to memory of 2928	1972	2i8muV3YUdasYZi.exe	34
PID 1972 wrote to memory of 2928	1972	2i8muV3YUdasYZi.exe	34
PID 1972 wrote to memory of 2928	1972	2i8muV3YUdasYZi.exe	34
PID 1972 wrote to memory of 2928	1972	2i8muV3YUdasYZi.exe	34
PID 1972 wrote to memory of 2928	1972	2i8muV3YUdasYZi.exe	34
PID 1972 wrote to memory of 2928	1972	2i8muV3YUdasYZi.exe	34
PID 1972 wrote to memory of 2928	1972	2i8muV3YUdasYZi.exe	34

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 behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1972
- 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:2852
- C:\Users\Admin\AppData\Local\Temp\2i8muV3YUdasYZi.exe
  "C:\Users\Admin\AppData\Local\Temp\2i8muV3YUdasYZi.exe"
  2⤵
  PID:2456
- 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:2928

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
f0b01ac72d7c977289236c5fba7674d7

SHA1
cbf8a3eaa6786baa9f7f53727810099b58ec643c

SHA256
5120db571cd2d0f13ac7b0df98a123c35337e630ba9d9bda79e5880cd4593807

SHA512
9140ee8635f55d36b606967d30fc7d12fa8ace6c4d1db8dadf53df231b4e8f9000bfdedaf5f6056ef4b098a4f71bb1ea3ae8f5ed3f1c9a8a4d4aa3d29b142fb0

Download Submit
memory/1972-0-0x0000000073FFE000-0x0000000073FFF000-memory.dmp

Filesize
4KB

Download
memory/1972-1-0x0000000000B30000-0x0000000000C22000-memory.dmp

Filesize
968KB

Download
memory/1972-2-0x0000000073FF0000-0x00000000746DE000-memory.dmp

Filesize
6.9MB

Download
memory/1972-3-0x0000000000970000-0x0000000000988000-memory.dmp

Filesize
96KB

Download
memory/1972-4-0x0000000073FFE000-0x0000000073FFF000-memory.dmp

Filesize
4KB

Download
memory/1972-5-0x0000000073FF0000-0x00000000746DE000-memory.dmp

Filesize
6.9MB

Download
memory/1972-6-0x0000000005E80000-0x0000000005F40000-memory.dmp

Filesize
768KB

Download
memory/1972-31-0x0000000073FF0000-0x00000000746DE000-memory.dmp

Filesize
6.9MB

Download
memory/2928-12-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2928-35-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2928-30-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2928-22-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2928-18-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2928-16-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2928-15-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2928-27-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2928-11-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2928-9-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2928-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2928-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2928-34-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2928-26-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2928-36-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2928-37-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2928-39-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2928-42-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2928-43-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2928-7-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2928-50-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2928-59-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2928-58-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2928-66-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2928-67-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download

Analysis

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