remcos | 3c0f9981e85d84d77fbba8ee32632a07c6fcee5ec7570a7d1b854f02ed3374d4

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
25-09-2024 01:35

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General

Target

PO_33948576383mth_pdf.exe
Size

889KB
MD5

f0689dfa240f533acc8079bcbff064e8
SHA1

b4f9d193d9ff8f0302af25212dffc67292fb752c
SHA256

993f261bd20b55d4a58dc129e2ef3d70ef23a7999e2d6b27d4eca2eb8b57e933
SHA512

12dcb5d05a8811ca7070a98acd844117097849044031920559d7043059d803effb54fe6f0cd0b579e899c964439f9929db6c00afbd6616cf2e949ab2df9c40b4
SSDEEP

24576:EnHNRRr5sff/UYS2DzidV2P6ktb8amzIoI:EnHNRRr5Q0YS2ydwR8TI

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
1912	powershell.exe
2812	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2352 set thread context of 2740	2352	PO_33948576383mth_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	PO_33948576383mth_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	RegSvcs.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
2868	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2352	PO_33948576383mth_pdf.exe
2812	powershell.exe
1912	powershell.exe
2352	PO_33948576383mth_pdf.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2352	PO_33948576383mth_pdf.exe
Token: SeDebugPrivilege	2812	powershell.exe
Token: SeDebugPrivilege	1912	powershell.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 2352 wrote to memory of 1912	2352	PO_33948576383mth_pdf.exe	31
PID 2352 wrote to memory of 1912	2352	PO_33948576383mth_pdf.exe	31
PID 2352 wrote to memory of 1912	2352	PO_33948576383mth_pdf.exe	31
PID 2352 wrote to memory of 1912	2352	PO_33948576383mth_pdf.exe	31
PID 2352 wrote to memory of 2812	2352	PO_33948576383mth_pdf.exe	33
PID 2352 wrote to memory of 2812	2352	PO_33948576383mth_pdf.exe	33
PID 2352 wrote to memory of 2812	2352	PO_33948576383mth_pdf.exe	33
PID 2352 wrote to memory of 2812	2352	PO_33948576383mth_pdf.exe	33
PID 2352 wrote to memory of 2868	2352	PO_33948576383mth_pdf.exe	35
PID 2352 wrote to memory of 2868	2352	PO_33948576383mth_pdf.exe	35
PID 2352 wrote to memory of 2868	2352	PO_33948576383mth_pdf.exe	35
PID 2352 wrote to memory of 2868	2352	PO_33948576383mth_pdf.exe	35
PID 2352 wrote to memory of 2740	2352	PO_33948576383mth_pdf.exe	37
PID 2352 wrote to memory of 2740	2352	PO_33948576383mth_pdf.exe	37
PID 2352 wrote to memory of 2740	2352	PO_33948576383mth_pdf.exe	37
PID 2352 wrote to memory of 2740	2352	PO_33948576383mth_pdf.exe	37
PID 2352 wrote to memory of 2740	2352	PO_33948576383mth_pdf.exe	37
PID 2352 wrote to memory of 2740	2352	PO_33948576383mth_pdf.exe	37
PID 2352 wrote to memory of 2740	2352	PO_33948576383mth_pdf.exe	37
PID 2352 wrote to memory of 2740	2352	PO_33948576383mth_pdf.exe	37
PID 2352 wrote to memory of 2740	2352	PO_33948576383mth_pdf.exe	37
PID 2352 wrote to memory of 2740	2352	PO_33948576383mth_pdf.exe	37
PID 2352 wrote to memory of 2740	2352	PO_33948576383mth_pdf.exe	37
PID 2352 wrote to memory of 2740	2352	PO_33948576383mth_pdf.exe	37
PID 2352 wrote to memory of 2740	2352	PO_33948576383mth_pdf.exe	37
PID 2352 wrote to memory of 2740	2352	PO_33948576383mth_pdf.exe	37
PID 2352 wrote to memory of 2740	2352	PO_33948576383mth_pdf.exe	37
PID 2352 wrote to memory of 2740	2352	PO_33948576383mth_pdf.exe	37

C:\Users\Admin\AppData\Local\Temp\PO_33948576383mth_pdf.exe
"C:\Users\Admin\AppData\Local\Temp\PO_33948576383mth_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:2352
- 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\PO_33948576383mth_pdf.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1912
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\WZiSWBRtQ.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2812
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\WZiSWBRtQ" /XML "C:\Users\Admin\AppData\Local\Temp\tmpD7B9.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2868
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2740

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpD7B9.tmp

Filesize
1KB

MD5
e4f7b88816c296546bfaa2ba095e9ba6

SHA1
120137b51f65c669a95724312d72b3b2cd297656

SHA256
25939328dc756e38ed3dd5dd5c92d6efdeabcff3eff5a66f7f53fbc1c40fd244

SHA512
739ff5a6147df251f243875c6025829d9cc945509dfcbe549bccd935ef630f86358f554052966a8d7753af24029320b99973fdc587ce403109ba706878d4d26b

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

Filesize
7KB

MD5
8e481f7f1d4aefc9789becda9dd4bd7c

SHA1
c046d6433f3eb2237d276ec1ade43159c9718303

SHA256
fa5caf0113eb892bada6662fa2dcc53f3bc664cc94adb9a756e4cae196b10e61

SHA512
3e84bde76e308fa0922a687ec2e74708c228fbf75f2178d9568f55e18a71b153167ce18626a69aefc939aef0f1edef2a63799c51f1f13e816629d0311ebbd794

Download Submit
memory/2352-0-0x0000000074CEE000-0x0000000074CEF000-memory.dmp

Filesize
4KB

Download
memory/2352-1-0x0000000000160000-0x0000000000244000-memory.dmp

Filesize
912KB

Download
memory/2352-2-0x0000000074CE0000-0x00000000753CE000-memory.dmp

Filesize
6.9MB

Download
memory/2352-3-0x00000000005F0000-0x0000000000602000-memory.dmp

Filesize
72KB

Download
memory/2352-4-0x0000000074CEE000-0x0000000074CEF000-memory.dmp

Filesize
4KB

Download
memory/2352-5-0x0000000074CE0000-0x00000000753CE000-memory.dmp

Filesize
6.9MB

Download
memory/2352-6-0x0000000005380000-0x000000000543E000-memory.dmp

Filesize
760KB

Download
memory/2352-40-0x0000000074CE0000-0x00000000753CE000-memory.dmp

Filesize
6.9MB

Download
memory/2740-27-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2740-41-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2740-33-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2740-39-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2740-38-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2740-37-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2740-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2740-29-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2740-36-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2740-19-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2740-25-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2740-23-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2740-21-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2740-35-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2740-42-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2740-43-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2740-44-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2740-45-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2740-48-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2740-49-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2740-51-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2740-50-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2740-53-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2740-52-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2740-54-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2740-55-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download