remcos | cd76524a5a1a193336ce0a72efa54af99367743c2d380d0416a1d09a516fad8b

Analysis

max time kernel
149s
max time network
146s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
23-09-2024 14:29

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General

Target

Purchase Order.exe
Size

902KB
MD5

171f8a0f5bba2ba4fab8d479c65f6651
SHA1

a7e8546d3b1dc9482e5800497eb482518efd4427
SHA256

cd76524a5a1a193336ce0a72efa54af99367743c2d380d0416a1d09a516fad8b
SHA512

3e113f1f1afd56c9ba8ae44f24480f89a60db7f62432cfbf9b77320747f48881ac81bfa692c18692a92906372de70bd8538eea4a88c253fa7f4a6b67d4b5915c
SSDEEP

24576:TlFCHP+tB+XNpYpKwiQgAG5FgfsmW1bp9xDe6:pFEtXopK1QVG0fUpT

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
2060	powershell.exe
2320	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1928 set thread context of 2604	1928	Purchase Order.exe	39

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	MSBuild.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Purchase Order.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
2720	schtasks.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
1928	Purchase Order.exe
2060	powershell.exe
2320	powershell.exe
1928	Purchase Order.exe
1928	Purchase Order.exe
1928	Purchase Order.exe
1928	Purchase Order.exe
1928	Purchase Order.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1928	Purchase Order.exe
Token: SeDebugPrivilege	2060	powershell.exe
Token: SeDebugPrivilege	2320	powershell.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 1928 wrote to memory of 2060	1928	Purchase Order.exe	31
PID 1928 wrote to memory of 2060	1928	Purchase Order.exe	31
PID 1928 wrote to memory of 2060	1928	Purchase Order.exe	31
PID 1928 wrote to memory of 2060	1928	Purchase Order.exe	31
PID 1928 wrote to memory of 2320	1928	Purchase Order.exe	33
PID 1928 wrote to memory of 2320	1928	Purchase Order.exe	33
PID 1928 wrote to memory of 2320	1928	Purchase Order.exe	33
PID 1928 wrote to memory of 2320	1928	Purchase Order.exe	33
PID 1928 wrote to memory of 2720	1928	Purchase Order.exe	35
PID 1928 wrote to memory of 2720	1928	Purchase Order.exe	35
PID 1928 wrote to memory of 2720	1928	Purchase Order.exe	35
PID 1928 wrote to memory of 2720	1928	Purchase Order.exe	35
PID 1928 wrote to memory of 2796	1928	Purchase Order.exe	37
PID 1928 wrote to memory of 2796	1928	Purchase Order.exe	37
PID 1928 wrote to memory of 2796	1928	Purchase Order.exe	37
PID 1928 wrote to memory of 2796	1928	Purchase Order.exe	37
PID 1928 wrote to memory of 2932	1928	Purchase Order.exe	38
PID 1928 wrote to memory of 2932	1928	Purchase Order.exe	38
PID 1928 wrote to memory of 2932	1928	Purchase Order.exe	38
PID 1928 wrote to memory of 2932	1928	Purchase Order.exe	38
PID 1928 wrote to memory of 2604	1928	Purchase Order.exe	39
PID 1928 wrote to memory of 2604	1928	Purchase Order.exe	39
PID 1928 wrote to memory of 2604	1928	Purchase Order.exe	39
PID 1928 wrote to memory of 2604	1928	Purchase Order.exe	39
PID 1928 wrote to memory of 2604	1928	Purchase Order.exe	39
PID 1928 wrote to memory of 2604	1928	Purchase Order.exe	39
PID 1928 wrote to memory of 2604	1928	Purchase Order.exe	39
PID 1928 wrote to memory of 2604	1928	Purchase Order.exe	39
PID 1928 wrote to memory of 2604	1928	Purchase Order.exe	39
PID 1928 wrote to memory of 2604	1928	Purchase Order.exe	39
PID 1928 wrote to memory of 2604	1928	Purchase Order.exe	39
PID 1928 wrote to memory of 2604	1928	Purchase Order.exe	39
PID 1928 wrote to memory of 2604	1928	Purchase Order.exe	39

C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe
"C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1928
- 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\Purchase Order.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2060
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\YzFfWxw.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2320
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\YzFfWxw" /XML "C:\Users\Admin\AppData\Local\Temp\tmp657.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2720
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
  2⤵
  PID:2796
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
  2⤵
  PID:2932
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2604

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\tmp657.tmp

Filesize
1KB

MD5
c4fef8d1c9fca32ff04de17aebf0b2fa

SHA1
41dedb51a1061e57679d065742ac7b432399d80d

SHA256
0a60fa85ed53927e9139b2b20b6588a796fac8a94e030e6f16aaecba335f26eb

SHA512
25ca31e3ce513f5c8191b75fbc4a7ed2d471bc086b575db6f5507c67b990e16f593ead6a7d65938fb6ecae31b9656d0a7e259f7f3af9a90048102821c880135b

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

Filesize
7KB

MD5
c1a7db9737a829d6a9f03c83a1d38f1c

SHA1
1a2ed62ffb2aebbb5d2febe3e7208911ebea6544

SHA256
dba2d774885805392996081738a0dfa215d2591e95025a026e773f4554f3e4b1

SHA512
e40b4ca8194709bd342baa2de9dfa159df5e9183258f3bc31e63cc973bd1a36d253c58eaf1427aec11cd2a3d3772040174c42a333a5098328663813242ed111f

Download Submit
memory/1928-0-0x00000000749CE000-0x00000000749CF000-memory.dmp

Filesize
4KB

Download
memory/1928-1-0x00000000013C0000-0x00000000014A8000-memory.dmp

Filesize
928KB

Download
memory/1928-2-0x00000000749C0000-0x00000000750AE000-memory.dmp

Filesize
6.9MB

Download
memory/1928-3-0x0000000000600000-0x0000000000612000-memory.dmp

Filesize
72KB

Download
memory/1928-4-0x00000000749CE000-0x00000000749CF000-memory.dmp

Filesize
4KB

Download
memory/1928-5-0x00000000749C0000-0x00000000750AE000-memory.dmp

Filesize
6.9MB

Download
memory/1928-6-0x00000000053F0000-0x00000000054AE000-memory.dmp

Filesize
760KB

Download
memory/1928-40-0x00000000749C0000-0x00000000750AE000-memory.dmp

Filesize
6.9MB

Download
memory/2604-19-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2604-41-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2604-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2604-29-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2604-27-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2604-25-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2604-39-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2604-23-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2604-36-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2604-35-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/2604-33-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2604-21-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2604-38-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2604-37-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2604-42-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2604-43-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2604-44-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2604-45-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2604-48-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2604-49-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2604-50-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2604-51-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2604-53-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2604-52-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2604-54-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2604-55-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download