remcos | 1f60d73df0c649c1473f8510d75eb83bee9826773f3e920ba3f290d71675faed

Analysis

max time kernel
148s
max time network
146s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
25-09-2024 00:45

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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
2696	powershell.exe
2708	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1920 set thread context of 1048	1920	PO_33948576383mth_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	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegSvcs.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PO_33948576383mth_pdf.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
2500	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1920	PO_33948576383mth_pdf.exe
2696	powershell.exe
2708	powershell.exe
1920	PO_33948576383mth_pdf.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1920	PO_33948576383mth_pdf.exe
Token: SeDebugPrivilege	2696	powershell.exe
Token: SeDebugPrivilege	2708	powershell.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 1920 wrote to memory of 2696	1920	PO_33948576383mth_pdf.exe	30
PID 1920 wrote to memory of 2696	1920	PO_33948576383mth_pdf.exe	30
PID 1920 wrote to memory of 2696	1920	PO_33948576383mth_pdf.exe	30
PID 1920 wrote to memory of 2696	1920	PO_33948576383mth_pdf.exe	30
PID 1920 wrote to memory of 2708	1920	PO_33948576383mth_pdf.exe	32
PID 1920 wrote to memory of 2708	1920	PO_33948576383mth_pdf.exe	32
PID 1920 wrote to memory of 2708	1920	PO_33948576383mth_pdf.exe	32
PID 1920 wrote to memory of 2708	1920	PO_33948576383mth_pdf.exe	32
PID 1920 wrote to memory of 2500	1920	PO_33948576383mth_pdf.exe	33
PID 1920 wrote to memory of 2500	1920	PO_33948576383mth_pdf.exe	33
PID 1920 wrote to memory of 2500	1920	PO_33948576383mth_pdf.exe	33
PID 1920 wrote to memory of 2500	1920	PO_33948576383mth_pdf.exe	33
PID 1920 wrote to memory of 1048	1920	PO_33948576383mth_pdf.exe	36
PID 1920 wrote to memory of 1048	1920	PO_33948576383mth_pdf.exe	36
PID 1920 wrote to memory of 1048	1920	PO_33948576383mth_pdf.exe	36
PID 1920 wrote to memory of 1048	1920	PO_33948576383mth_pdf.exe	36
PID 1920 wrote to memory of 1048	1920	PO_33948576383mth_pdf.exe	36
PID 1920 wrote to memory of 1048	1920	PO_33948576383mth_pdf.exe	36
PID 1920 wrote to memory of 1048	1920	PO_33948576383mth_pdf.exe	36
PID 1920 wrote to memory of 1048	1920	PO_33948576383mth_pdf.exe	36
PID 1920 wrote to memory of 1048	1920	PO_33948576383mth_pdf.exe	36
PID 1920 wrote to memory of 1048	1920	PO_33948576383mth_pdf.exe	36
PID 1920 wrote to memory of 1048	1920	PO_33948576383mth_pdf.exe	36
PID 1920 wrote to memory of 1048	1920	PO_33948576383mth_pdf.exe	36
PID 1920 wrote to memory of 1048	1920	PO_33948576383mth_pdf.exe	36
PID 1920 wrote to memory of 1048	1920	PO_33948576383mth_pdf.exe	36
PID 1920 wrote to memory of 1048	1920	PO_33948576383mth_pdf.exe	36
PID 1920 wrote to memory of 1048	1920	PO_33948576383mth_pdf.exe	36

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:1920
- 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:2696
- 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:2708
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\WZiSWBRtQ" /XML "C:\Users\Admin\AppData\Local\Temp\tmpCDDA.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2500
- 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:1048

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\tmpCDDA.tmp

Filesize
1KB

MD5
04eac19ecf829a97ff1f32a7429f9a9c

SHA1
e5ec55e9f75829248b68042e969d2f567b77692b

SHA256
3719338a932229f4d2cce69b2daf7c1a9491314831c9a859b631182e45364b86

SHA512
488d5d572799eb02dc4785423252ce08e8cac76fa7a5d06b6c49b38ba822a95ca88542a06cda163306bea26d94be9f7b535bb1779d46bddd0818784b80a81e31

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

Filesize
7KB

MD5
e8d6d398c75a1fbcc0034c823da410c6

SHA1
7b9f24e075b39795ac26d4532beaf37c0e03864d

SHA256
5157997949acf37edcc212697a232619066e463ff2c742a803322b109b6cf076

SHA512
e1d28d0fa2e6a3affd8f3e7bc007c8457a02106dc3d7ec1998fbf2fb8005993be1a66802993d36468a012a420f34b4a99887c624d0e4f3348be9b5607ca24910

Download Submit
memory/1048-23-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1048-27-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1048-55-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1048-54-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1048-53-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1048-52-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1048-50-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1048-36-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1048-35-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1048-21-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1048-38-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1048-37-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1048-33-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1048-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1048-29-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1048-25-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1048-51-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1048-49-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1048-39-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1048-19-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1048-48-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1048-41-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1048-42-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1048-43-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1048-44-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1048-45-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1920-40-0x0000000074C60000-0x000000007534E000-memory.dmp

Filesize
6.9MB

Download
memory/1920-3-0x0000000000620000-0x0000000000632000-memory.dmp

Filesize
72KB

Download
memory/1920-6-0x0000000005120000-0x00000000051DE000-memory.dmp

Filesize
760KB

Download
memory/1920-1-0x0000000000C40000-0x0000000000D24000-memory.dmp

Filesize
912KB

Download
memory/1920-2-0x0000000074C60000-0x000000007534E000-memory.dmp

Filesize
6.9MB

Download
memory/1920-0-0x0000000074C6E000-0x0000000074C6F000-memory.dmp

Filesize
4KB

Download
memory/1920-5-0x0000000074C60000-0x000000007534E000-memory.dmp

Filesize
6.9MB

Download
memory/1920-4-0x0000000074C6E000-0x0000000074C6F000-memory.dmp

Filesize
4KB

Download