remcos | 49e7ee12a475105efab2e363450b2e5582fc05d114967fe57a3d80d22a2fea81

Resubmissions

21/09/2024, 23:17

240921-292mcszcnl 10

21/09/2024, 23:07

240921-23yxwsyhqp 10

Analysis

max time kernel
597s
max time network
601s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
21/09/2024, 23:17

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General

Target

Quotationpdf.exe
Size

869KB
MD5

27934061e8cbcfcf5e5b8937a662c26f
SHA1

a508513b842e11c7c277af67e4bc51466d0637b8
SHA256

49e7ee12a475105efab2e363450b2e5582fc05d114967fe57a3d80d22a2fea81
SHA512

c79374546867ae8197d6fdbec40150b7124e272151e73c2a7361dd96a04b3a5f710d42f82b0d77349a07ae667aee066b11c949782eb2f2329e3711752e2c95d2
SSDEEP

24576:q0jXiRZoEJGywbvjCe9WRSKObmSej7vydBs:MDIvjCe4ebmSejzf

Score

10^/10

remcos remotehost discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

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
2752	powershell.exe
2736	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2268 set thread context of 2652	2268	Quotationpdf.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	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Quotationpdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Quotationpdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.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
2636	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2268	Quotationpdf.exe
2268	Quotationpdf.exe
2736	powershell.exe
2752	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2268	Quotationpdf.exe
Token: SeDebugPrivilege	2736	powershell.exe
Token: SeDebugPrivilege	2752	powershell.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 2268 wrote to memory of 2752	2268	Quotationpdf.exe	31
PID 2268 wrote to memory of 2752	2268	Quotationpdf.exe	31
PID 2268 wrote to memory of 2752	2268	Quotationpdf.exe	31
PID 2268 wrote to memory of 2752	2268	Quotationpdf.exe	31
PID 2268 wrote to memory of 2736	2268	Quotationpdf.exe	33
PID 2268 wrote to memory of 2736	2268	Quotationpdf.exe	33
PID 2268 wrote to memory of 2736	2268	Quotationpdf.exe	33
PID 2268 wrote to memory of 2736	2268	Quotationpdf.exe	33
PID 2268 wrote to memory of 2636	2268	Quotationpdf.exe	35
PID 2268 wrote to memory of 2636	2268	Quotationpdf.exe	35
PID 2268 wrote to memory of 2636	2268	Quotationpdf.exe	35
PID 2268 wrote to memory of 2636	2268	Quotationpdf.exe	35
PID 2268 wrote to memory of 2652	2268	Quotationpdf.exe	37
PID 2268 wrote to memory of 2652	2268	Quotationpdf.exe	37
PID 2268 wrote to memory of 2652	2268	Quotationpdf.exe	37
PID 2268 wrote to memory of 2652	2268	Quotationpdf.exe	37
PID 2268 wrote to memory of 2652	2268	Quotationpdf.exe	37
PID 2268 wrote to memory of 2652	2268	Quotationpdf.exe	37
PID 2268 wrote to memory of 2652	2268	Quotationpdf.exe	37
PID 2268 wrote to memory of 2652	2268	Quotationpdf.exe	37
PID 2268 wrote to memory of 2652	2268	Quotationpdf.exe	37
PID 2268 wrote to memory of 2652	2268	Quotationpdf.exe	37
PID 2268 wrote to memory of 2652	2268	Quotationpdf.exe	37
PID 2268 wrote to memory of 2652	2268	Quotationpdf.exe	37
PID 2268 wrote to memory of 2652	2268	Quotationpdf.exe	37

C:\Users\Admin\AppData\Local\Temp\Quotationpdf.exe
"C:\Users\Admin\AppData\Local\Temp\Quotationpdf.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2268
- 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\Quotationpdf.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2752
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\BptXqGmS.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2736
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\BptXqGmS" /XML "C:\Users\Admin\AppData\Local\Temp\tmpD163.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2636
- C:\Users\Admin\AppData\Local\Temp\Quotationpdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Quotationpdf.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2652

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpD163.tmp

Filesize
1KB

MD5
0a799fbf48fcf785ce8478195dc33d43

SHA1
dff4cdb4db2aee0e9b15baff181f56492f8e7010

SHA256
768451e1d2f4b638d7967a7d67090a1b43b8344569d2a09a07205b3913d431c0

SHA512
e0caafe2d6ba3fbb54c181b4f8b9b8063161930b96c634d783b10c15eb1d6980953746c42c27173f3769664ab9a84159f6215df250a3b610f3d14698129cbdba

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

Filesize
7KB

MD5
b2faf78042b1f29e407698cfd4e1bc53

SHA1
76dec93ab3c3b903b6a6489aa870712c7c34fff0

SHA256
1da186bb0f4c9981a3e61d53a6f848feb90796faef5c94a1b5a00a8e4d5353ef

SHA512
6657fd623a8ca37d8741f2302be57917c9c7cebc33a9bfb928c46cabe784ae7c105aed4b344cd9d661cddd1895e75f231eb6abf4d74bbb9070234d22ddce3f27

Download Submit
memory/2268-0-0x000000007408E000-0x000000007408F000-memory.dmp

Filesize
4KB

Download
memory/2268-1-0x00000000011B0000-0x0000000001290000-memory.dmp

Filesize
896KB

Download
memory/2268-2-0x0000000074080000-0x000000007476E000-memory.dmp

Filesize
6.9MB

Download
memory/2268-3-0x00000000003A0000-0x00000000003B0000-memory.dmp

Filesize
64KB

Download
memory/2268-4-0x000000007408E000-0x000000007408F000-memory.dmp

Filesize
4KB

Download
memory/2268-5-0x0000000074080000-0x000000007476E000-memory.dmp

Filesize
6.9MB

Download
memory/2268-6-0x00000000055B0000-0x000000000566E000-memory.dmp

Filesize
760KB

Download
memory/2268-40-0x0000000074080000-0x000000007476E000-memory.dmp

Filesize
6.9MB

Download
memory/2652-36-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2652-45-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2652-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2652-29-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2652-27-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2652-25-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2652-33-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2652-39-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2652-38-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2652-37-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2652-21-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2652-35-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2652-23-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2652-41-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2652-42-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2652-43-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2652-44-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2652-20-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2652-47-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2652-48-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2652-49-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2652-50-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2652-51-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2652-53-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2652-52-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2652-54-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2652-55-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2652-60-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2652-61-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2652-64-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2652-65-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2652-66-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2652-67-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download