remcos | 8f2c4543e4bc9194d1c1a9bc946a75d49162b0eee2715df4ba626980892107b5

General

Target

Quotation_pdf.exe
Size

883KB
MD5

571902de75705d1aeaa32be01459dc65
SHA1

4ccf3c9a339146008c1d8466857e13d3c7752a05
SHA256

8f2c4543e4bc9194d1c1a9bc946a75d49162b0eee2715df4ba626980892107b5
SHA512

966381cdeaf8213fefdca876052a59dcda9e2436cfc50b4516eca936ebb9e75b9421058969526fa0b46d06067a43398a51c8e7201fa72d39faa0153c4328a9d7
SSDEEP

24576:kBGzjcJ6NacNEyNOU+6cNuuH2SNcjmYY4Swv:kE86N1l5x8uuWSpYXS2

Score

10^/10

remcos remotehost discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

127.0.0.1:59321

nnamoo.duckdns.org:59321

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-41EVS0
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

Command and Scripting Interpreter: PowerShell 1 TTPs 2 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
2668	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 764 set thread context of 1384	764	Quotation_pdf.exe	37

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 5 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	Quotation_pdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Quotation_pdf.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2796	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
764	Quotation_pdf.exe
764	Quotation_pdf.exe
2852	powershell.exe
2668	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	764	Quotation_pdf.exe
Token: SeDebugPrivilege	2852	powershell.exe
Token: SeDebugPrivilege	2668	powershell.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 764 wrote to memory of 2668	764	Quotation_pdf.exe	31
PID 764 wrote to memory of 2668	764	Quotation_pdf.exe	31
PID 764 wrote to memory of 2668	764	Quotation_pdf.exe	31
PID 764 wrote to memory of 2668	764	Quotation_pdf.exe	31
PID 764 wrote to memory of 2852	764	Quotation_pdf.exe	33
PID 764 wrote to memory of 2852	764	Quotation_pdf.exe	33
PID 764 wrote to memory of 2852	764	Quotation_pdf.exe	33
PID 764 wrote to memory of 2852	764	Quotation_pdf.exe	33
PID 764 wrote to memory of 2796	764	Quotation_pdf.exe	35
PID 764 wrote to memory of 2796	764	Quotation_pdf.exe	35
PID 764 wrote to memory of 2796	764	Quotation_pdf.exe	35
PID 764 wrote to memory of 2796	764	Quotation_pdf.exe	35
PID 764 wrote to memory of 1384	764	Quotation_pdf.exe	37
PID 764 wrote to memory of 1384	764	Quotation_pdf.exe	37
PID 764 wrote to memory of 1384	764	Quotation_pdf.exe	37
PID 764 wrote to memory of 1384	764	Quotation_pdf.exe	37
PID 764 wrote to memory of 1384	764	Quotation_pdf.exe	37
PID 764 wrote to memory of 1384	764	Quotation_pdf.exe	37
PID 764 wrote to memory of 1384	764	Quotation_pdf.exe	37
PID 764 wrote to memory of 1384	764	Quotation_pdf.exe	37
PID 764 wrote to memory of 1384	764	Quotation_pdf.exe	37
PID 764 wrote to memory of 1384	764	Quotation_pdf.exe	37
PID 764 wrote to memory of 1384	764	Quotation_pdf.exe	37
PID 764 wrote to memory of 1384	764	Quotation_pdf.exe	37
PID 764 wrote to memory of 1384	764	Quotation_pdf.exe	37

C:\Users\Admin\AppData\Local\Temp\Quotation_pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Quotation_pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:764
- 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\Quotation_pdf.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2668
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\efsOOkOP.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2852
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\efsOOkOP" /XML "C:\Users\Admin\AppData\Local\Temp\tmp1A25.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2796
- C:\Users\Admin\AppData\Local\Temp\Quotation_pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Quotation_pdf.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1384

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp1A25.tmp

Filesize
1KB

MD5
c6d242f0c7188abe56e211cfee1be470

SHA1
c15ed1841000114b01ff3a770675fd0cd98b26d8

SHA256
ebaf6a790ba5f49c53707e23eb237eacafa2ad13a6bd888e4deacc4aec8665fb

SHA512
a9487b2305e50783b6095e148ed83c396c73be9e5af2fe350294e1a0c9b4efb7c5704820ac184fdfa15936a0801b831bb4b05364da714339a15610d64cbd3286

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\JH5NUN73YGKVQ6AEHYAT.temp

Filesize
7KB

MD5
1c44a07006e4bcaa38e9293ceabc9b13

SHA1
be4e3233710fc2abf029f237dd9eeafc7555deb5

SHA256
dd5dedc198c357705fcb71c22861399d3645a52d018a0ab7ba30b78c4961754c

SHA512
47a029f80f910f22333781d8c61683323f340a9eb412faa117c0e08111dc9cdc64e3500385acbdc733171bed18f23197f078078edbf2474289bb99ede57fdf1a

Download Submit
memory/764-0-0x000000007479E000-0x000000007479F000-memory.dmp

Filesize
4KB

Download
memory/764-1-0x0000000000C70000-0x0000000000D54000-memory.dmp

Filesize
912KB

Download
memory/764-2-0x0000000074790000-0x0000000074E7E000-memory.dmp

Filesize
6.9MB

Download
memory/764-3-0x0000000000310000-0x0000000000322000-memory.dmp

Filesize
72KB

Download
memory/764-4-0x000000007479E000-0x000000007479F000-memory.dmp

Filesize
4KB

Download
memory/764-5-0x0000000074790000-0x0000000074E7E000-memory.dmp

Filesize
6.9MB

Download
memory/764-6-0x00000000051F0000-0x00000000052AE000-memory.dmp

Filesize
760KB

Download
memory/764-40-0x0000000074790000-0x0000000074E7E000-memory.dmp

Filesize
6.9MB

Download
memory/1384-27-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1384-41-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1384-38-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1384-37-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1384-35-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1384-33-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1384-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1384-29-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1384-36-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1384-25-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1384-23-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1384-19-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1384-21-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1384-39-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1384-42-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1384-43-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1384-44-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1384-45-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1384-48-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1384-49-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1384-50-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1384-51-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1384-52-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1384-53-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1384-54-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1384-55-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads