remcos | 02a113310c4b7d8b1b47afeff0f4df059d212400b29edba2b0e5754dd4748289

Analysis

max time kernel
148s
max time network
147s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
12/02/2025, 12:58

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General

Target

Bukti_Transfer..WU.exe
Size

1.0MB
MD5

e48ca032affdeea3ee88874ed39c4dcd
SHA1

ca3e925e87dc3bc5bd1878bc9d74cd709d7a9622
SHA256

21224cc236d63c5d3d7d3f80be375d3c2408f7a91b08eb6a16d70c7db21106d9
SHA512

4a727c97e2af20c296f01f89953fc20908d628cc97c4fa372d15d003427c5f0e2b2146d214df4a22b8b62fb46f121df0021cb18056bfba6c7ec824c892b3da53
SSDEEP

24576:D+wIZTFg2BK8sgD08CwrjYFMIzsBk6tkAfiRN+BU:D+wIZTOBRgDhnY2M6tV6RND

Score

10^/10

remcos feb 09 discovery execution rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

FEB 09

oktoviyanto.ddns.net:9373

103.186.117.61:9373

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-Z2L02T
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
Remcos family
remcos

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
1972	powershell.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1796 set thread context of 2716	1796	Bukti_Transfer..WU.exe	35

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 4 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	Bukti_Transfer..WU.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Bukti_Transfer..WU.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
2292	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1796	Bukti_Transfer..WU.exe
1796	Bukti_Transfer..WU.exe
1972	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1796	Bukti_Transfer..WU.exe
Token: SeDebugPrivilege	1972	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2716	Bukti_Transfer..WU.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1796 wrote to memory of 1972	1796	Bukti_Transfer..WU.exe	31
PID 1796 wrote to memory of 1972	1796	Bukti_Transfer..WU.exe	31
PID 1796 wrote to memory of 1972	1796	Bukti_Transfer..WU.exe	31
PID 1796 wrote to memory of 1972	1796	Bukti_Transfer..WU.exe	31
PID 1796 wrote to memory of 2292	1796	Bukti_Transfer..WU.exe	33
PID 1796 wrote to memory of 2292	1796	Bukti_Transfer..WU.exe	33
PID 1796 wrote to memory of 2292	1796	Bukti_Transfer..WU.exe	33
PID 1796 wrote to memory of 2292	1796	Bukti_Transfer..WU.exe	33
PID 1796 wrote to memory of 2716	1796	Bukti_Transfer..WU.exe	35
PID 1796 wrote to memory of 2716	1796	Bukti_Transfer..WU.exe	35
PID 1796 wrote to memory of 2716	1796	Bukti_Transfer..WU.exe	35
PID 1796 wrote to memory of 2716	1796	Bukti_Transfer..WU.exe	35
PID 1796 wrote to memory of 2716	1796	Bukti_Transfer..WU.exe	35
PID 1796 wrote to memory of 2716	1796	Bukti_Transfer..WU.exe	35
PID 1796 wrote to memory of 2716	1796	Bukti_Transfer..WU.exe	35
PID 1796 wrote to memory of 2716	1796	Bukti_Transfer..WU.exe	35
PID 1796 wrote to memory of 2716	1796	Bukti_Transfer..WU.exe	35
PID 1796 wrote to memory of 2716	1796	Bukti_Transfer..WU.exe	35
PID 1796 wrote to memory of 2716	1796	Bukti_Transfer..WU.exe	35
PID 1796 wrote to memory of 2716	1796	Bukti_Transfer..WU.exe	35
PID 1796 wrote to memory of 2716	1796	Bukti_Transfer..WU.exe	35

C:\Users\Admin\AppData\Local\Temp\Bukti_Transfer..WU.exe
"C:\Users\Admin\AppData\Local\Temp\Bukti_Transfer..WU.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1796
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\cxLZERvGna.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1972
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\cxLZERvGna" /XML "C:\Users\Admin\AppData\Local\Temp\tmpFE2D.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2292
- C:\Users\Admin\AppData\Local\Temp\Bukti_Transfer..WU.exe
  "C:\Users\Admin\AppData\Local\Temp\Bukti_Transfer..WU.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:2716

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

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
6b114fb45ed97263dddaed73b649d623

SHA1
ab18b5efe5a68fd45194d695262a7bc68dddcc20

SHA256
ee9230327f9e7f2ec69c2f821bd8ed93b8b1b0a2088d0227033b6e0ab6aa2cf7

SHA512
b143fa59eee6e52c8340b3960ea4bcb5102bab82b9f646a27e2508323f8b269a1e054dcb8ada0380fb20347ebfa23cc2f731328dcf937816ad490f4456b460bd

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpFE2D.tmp

Filesize
1KB

MD5
1556334679a06be1b1b1f06e73370a8f

SHA1
5ca56192e486ce722e3faeadd747a365093fa6f2

SHA256
84acfe87db9bea9fb3faa4110903aaf8ce55dbfdc452cf79ceea2ae23cdc821a

SHA512
7827cd6ff6af15bbe8b911ecb0c8fe704a6a3ced17e1ad146b6fc3db6b79667c4d0ea6cf6c27d420625fb2ede3b490dafe9e86c61733149c4594415fe12ee54f

Download Submit
memory/1796-0-0x0000000074D6E000-0x0000000074D6F000-memory.dmp

Filesize
4KB

Download
memory/1796-1-0x00000000002B0000-0x00000000003BC000-memory.dmp

Filesize
1.0MB

Download
memory/1796-2-0x0000000074D60000-0x000000007544E000-memory.dmp

Filesize
6.9MB

Download
memory/1796-3-0x0000000001F40000-0x0000000001F5E000-memory.dmp

Filesize
120KB

Download
memory/1796-4-0x0000000074D6E000-0x0000000074D6F000-memory.dmp

Filesize
4KB

Download
memory/1796-5-0x0000000074D60000-0x000000007544E000-memory.dmp

Filesize
6.9MB

Download
memory/1796-6-0x0000000005040000-0x0000000005100000-memory.dmp

Filesize
768KB

Download
memory/1796-35-0x0000000074D60000-0x000000007544E000-memory.dmp

Filesize
6.9MB

Download
memory/2716-20-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-41-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-14-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-34-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-30-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-29-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-28-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2716-26-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-24-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-22-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-18-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-38-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-39-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-40-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-17-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-43-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-42-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-44-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-48-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-12-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-54-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-56-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-57-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-65-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-66-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-74-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-73-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-81-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-82-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download