remcos | 154cf5e736dcc256fa3d229d1f0dcb4b29ac28081044757c5ae451ddf276c7b0

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
2652	powershell.exe
2516	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2736 set thread context of 2612	2736	Quotation_pdf.exe	36

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
2664	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2736	Quotation_pdf.exe
2736	Quotation_pdf.exe
2652	powershell.exe
2516	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2736	Quotation_pdf.exe
Token: SeDebugPrivilege	2652	powershell.exe
Token: SeDebugPrivilege	2516	powershell.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 2736 wrote to memory of 2652	2736	Quotation_pdf.exe	30
PID 2736 wrote to memory of 2652	2736	Quotation_pdf.exe	30
PID 2736 wrote to memory of 2652	2736	Quotation_pdf.exe	30
PID 2736 wrote to memory of 2652	2736	Quotation_pdf.exe	30
PID 2736 wrote to memory of 2516	2736	Quotation_pdf.exe	32
PID 2736 wrote to memory of 2516	2736	Quotation_pdf.exe	32
PID 2736 wrote to memory of 2516	2736	Quotation_pdf.exe	32
PID 2736 wrote to memory of 2516	2736	Quotation_pdf.exe	32
PID 2736 wrote to memory of 2664	2736	Quotation_pdf.exe	34
PID 2736 wrote to memory of 2664	2736	Quotation_pdf.exe	34
PID 2736 wrote to memory of 2664	2736	Quotation_pdf.exe	34
PID 2736 wrote to memory of 2664	2736	Quotation_pdf.exe	34
PID 2736 wrote to memory of 2612	2736	Quotation_pdf.exe	36
PID 2736 wrote to memory of 2612	2736	Quotation_pdf.exe	36
PID 2736 wrote to memory of 2612	2736	Quotation_pdf.exe	36
PID 2736 wrote to memory of 2612	2736	Quotation_pdf.exe	36
PID 2736 wrote to memory of 2612	2736	Quotation_pdf.exe	36
PID 2736 wrote to memory of 2612	2736	Quotation_pdf.exe	36
PID 2736 wrote to memory of 2612	2736	Quotation_pdf.exe	36
PID 2736 wrote to memory of 2612	2736	Quotation_pdf.exe	36
PID 2736 wrote to memory of 2612	2736	Quotation_pdf.exe	36
PID 2736 wrote to memory of 2612	2736	Quotation_pdf.exe	36
PID 2736 wrote to memory of 2612	2736	Quotation_pdf.exe	36
PID 2736 wrote to memory of 2612	2736	Quotation_pdf.exe	36
PID 2736 wrote to memory of 2612	2736	Quotation_pdf.exe	36

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:2736
- 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:2652
- 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:2516
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\efsOOkOP" /XML "C:\Users\Admin\AppData\Local\Temp\tmp7D3B.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2664
- 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:2612

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\tmp7D3B.tmp

Filesize
1KB

MD5
d7ab73047698196e202bfd8b910a8647

SHA1
677fa4c8dea3145ad55366f1f552e91bced51137

SHA256
01d8799d04ed3e8572c9e48d215793218fdcf74101f632b6356283e248232999

SHA512
ed18b509e539c179c058d1525283c9bef25c9f543bec67b8afab14d953d2cdcb5d9161df5f6249381d38576b25d84c6c2b0e415cc851675f1932def56383f72d

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

Filesize
7KB

MD5
dfe63acc28947d67a2e31fe0a0383875

SHA1
ce2ae7b86f91586fb7fa10393975dcd9a91556c5

SHA256
de48f7e660a06eab76cea8dd4b672bc1449a2ce9ae95e0a813518a6a1d37bb7c

SHA512
cc1fa41f7d8c906853016e5e6abfb1819ab9fed1710b348b39db349f9597ee79515a3c6aca0dfb0192b86ef04440cb9545420bb66e872926c5a18488d1acc0e0

Download Submit
memory/2612-29-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2612-45-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2612-55-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2612-25-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2612-53-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2612-23-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2612-52-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2612-19-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2612-27-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2612-36-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2612-38-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2612-37-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2612-35-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2612-33-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2612-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2612-39-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2612-54-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2612-50-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2612-51-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2612-21-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2612-49-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2612-41-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2612-42-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2612-43-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2612-44-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2612-48-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2612-47-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2736-3-0x00000000004F0000-0x0000000000502000-memory.dmp

Filesize
72KB

Download
memory/2736-40-0x0000000074810000-0x0000000074EFE000-memory.dmp

Filesize
6.9MB

Download
memory/2736-2-0x0000000074810000-0x0000000074EFE000-memory.dmp

Filesize
6.9MB

Download
memory/2736-5-0x0000000074810000-0x0000000074EFE000-memory.dmp

Filesize
6.9MB

Download
memory/2736-1-0x0000000001080000-0x0000000001164000-memory.dmp

Filesize
912KB

Download
memory/2736-6-0x00000000053D0000-0x000000000548E000-memory.dmp

Filesize
760KB

Download
memory/2736-0-0x000000007481E000-0x000000007481F000-memory.dmp

Filesize
4KB

Download
memory/2736-4-0x000000007481E000-0x000000007481F000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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