remcos | 1f60d73df0c649c1473f8510d75eb83bee9826773f3e920ba3f290d71675faed

Analysis

max time kernel
149s
max time network
152s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
25-09-2024 06:46

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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
1720	powershell.exe
1608	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1856 set thread context of 2008	1856	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	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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.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
2680	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1856	PO_33948576383mth_pdf.exe
1856	PO_33948576383mth_pdf.exe
1608	powershell.exe
1720	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1856	PO_33948576383mth_pdf.exe
Token: SeDebugPrivilege	1608	powershell.exe
Token: SeDebugPrivilege	1720	powershell.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 1856 wrote to memory of 1720	1856	PO_33948576383mth_pdf.exe	31
PID 1856 wrote to memory of 1720	1856	PO_33948576383mth_pdf.exe	31
PID 1856 wrote to memory of 1720	1856	PO_33948576383mth_pdf.exe	31
PID 1856 wrote to memory of 1720	1856	PO_33948576383mth_pdf.exe	31
PID 1856 wrote to memory of 1608	1856	PO_33948576383mth_pdf.exe	33
PID 1856 wrote to memory of 1608	1856	PO_33948576383mth_pdf.exe	33
PID 1856 wrote to memory of 1608	1856	PO_33948576383mth_pdf.exe	33
PID 1856 wrote to memory of 1608	1856	PO_33948576383mth_pdf.exe	33
PID 1856 wrote to memory of 2680	1856	PO_33948576383mth_pdf.exe	35
PID 1856 wrote to memory of 2680	1856	PO_33948576383mth_pdf.exe	35
PID 1856 wrote to memory of 2680	1856	PO_33948576383mth_pdf.exe	35
PID 1856 wrote to memory of 2680	1856	PO_33948576383mth_pdf.exe	35
PID 1856 wrote to memory of 2008	1856	PO_33948576383mth_pdf.exe	37
PID 1856 wrote to memory of 2008	1856	PO_33948576383mth_pdf.exe	37
PID 1856 wrote to memory of 2008	1856	PO_33948576383mth_pdf.exe	37
PID 1856 wrote to memory of 2008	1856	PO_33948576383mth_pdf.exe	37
PID 1856 wrote to memory of 2008	1856	PO_33948576383mth_pdf.exe	37
PID 1856 wrote to memory of 2008	1856	PO_33948576383mth_pdf.exe	37
PID 1856 wrote to memory of 2008	1856	PO_33948576383mth_pdf.exe	37
PID 1856 wrote to memory of 2008	1856	PO_33948576383mth_pdf.exe	37
PID 1856 wrote to memory of 2008	1856	PO_33948576383mth_pdf.exe	37
PID 1856 wrote to memory of 2008	1856	PO_33948576383mth_pdf.exe	37
PID 1856 wrote to memory of 2008	1856	PO_33948576383mth_pdf.exe	37
PID 1856 wrote to memory of 2008	1856	PO_33948576383mth_pdf.exe	37
PID 1856 wrote to memory of 2008	1856	PO_33948576383mth_pdf.exe	37
PID 1856 wrote to memory of 2008	1856	PO_33948576383mth_pdf.exe	37
PID 1856 wrote to memory of 2008	1856	PO_33948576383mth_pdf.exe	37
PID 1856 wrote to memory of 2008	1856	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:1856
- 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:1720
- 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:1608
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\WZiSWBRtQ" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA1E.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2680
- 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:2008

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\tmpA1E.tmp

Filesize
1KB

MD5
7a999e2e634a1d518b80dc22e69e0156

SHA1
1ac4706dd84ff80771faa19ba9f6751fe020ad07

SHA256
846c8b177faf2b9b3d9f96edba884c6973edfc712866fc755abe082968245457

SHA512
27b8514b958f0c05bb64d03a7ad9e2133d53637e9af1b46e14a734c5ee5c3e70c3233e5c4bc4de560ba0de4d28dbd06150c058d1ddf28dee2f9b6b70ce46ee00

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\Z9E6EV6CNL1MQ9M0BYRK.temp

Filesize
7KB

MD5
b0eb91c9e07d68cf48ddb6299d88821d

SHA1
3f9fdcfcfe8422a05e53b8f463c13dbc4e053a04

SHA256
1cc38d0559de405b7ef7a4d61d637ee65d20d708fc1da4e30dacadff1818be60

SHA512
974ba7a9c58407b08fafc0f3ebb773dc045e0fb5156cf8819ca095a3c607080b6da9b3d6937bd800cc0fb0e25add160d0e268960a3c3cff07df376188b53d2cd

Download Submit
memory/1856-0-0x00000000749DE000-0x00000000749DF000-memory.dmp

Filesize
4KB

Download
memory/1856-1-0x0000000000EE0000-0x0000000000FC4000-memory.dmp

Filesize
912KB

Download
memory/1856-2-0x00000000749D0000-0x00000000750BE000-memory.dmp

Filesize
6.9MB

Download
memory/1856-3-0x00000000006B0000-0x00000000006C2000-memory.dmp

Filesize
72KB

Download
memory/1856-4-0x00000000749DE000-0x00000000749DF000-memory.dmp

Filesize
4KB

Download
memory/1856-5-0x00000000749D0000-0x00000000750BE000-memory.dmp

Filesize
6.9MB

Download
memory/1856-6-0x00000000053B0000-0x000000000546E000-memory.dmp

Filesize
760KB

Download
memory/1856-40-0x00000000749D0000-0x00000000750BE000-memory.dmp

Filesize
6.9MB

Download
memory/2008-21-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2008-41-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2008-35-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2008-33-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2008-29-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2008-27-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2008-25-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2008-24-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2008-37-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2008-39-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2008-19-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2008-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2008-38-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2008-36-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2008-42-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2008-44-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2008-43-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2008-45-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2008-47-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2008-49-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2008-48-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2008-50-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2008-51-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2008-52-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2008-53-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2008-54-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2008-55-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download