remcos | 64d3136fc3cee6e521fe4e2f9b291a86d747da7a657ac0b8e3afdfd607627a6c

General

Target
a6ce22418512c7abede5f27649562322.exe
Size 92KB
Sample231205-l43dpsad51
SHA256 64d3136fc3cee6e521fe4e2f9b291a86d747da7a657ac0b8e3afdfd607627a6c
MD5 a6ce22418512c7abede5f27649562322
SHA1 168de059df20b07056fa19c9d52f73b1062b6d45
SHA512 0bd0ffc40705228e43293a781402f1d020be7522e144fe65a3774485dcc4802db0b20d47dfe2a303c38d3284f014110a9a6a6e4dcbf5583d8369129b2fe12f71
SSDEEP 1536:IhhW0YTGZWdVseJxaM9kraLdV2QkQ1TbPX8IHOCkIsI4ESHNTh9E+JP19qkP66r0:OhzYTGWVvJ8f2v1TbPzuMsIFSHNThy+C
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos christmas persistence rat

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Christmas

C2

ascoitaliasasummer.duckdns.org:2025

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
Windows Sessions Pause.exe
copy_folder
Microsoft Media Session
delete_file
false
hide_file
true
hide_keylog_file
true
install_flag
true
install_path
%WinDir%
keylog_crypt
true
keylog_file
logs.dat
keylog_flag
false
keylog_folder
Windows Display
keylog_path
%WinDir%
mouse_option
false
mutex
Windows Audio
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screens
screenshot_path
%AppData%
screenshot_time
1
startup_value
Windows Sounds EndPoints
take_screenshot_option
true
take_screenshot_time
5
take_screenshot_title
Username;password;proforma;invoice;notepad

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3936660601-1848837011-2142350499-1000\Control Panel\International\Geo\Nation	a6ce22418512c7abede5f27649562322.exe

Executes dropped EXE 1 IoCs

pid	Process
1468	Windows Sessions Pause.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3936660601-1848837011-2142350499-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Sounds EndPoints = "\"C:\\Windows\\Microsoft Media Session\\Windows Sessions Pause.exe\""	a6ce22418512c7abede5f27649562322.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Windows Sounds EndPoints = "\"C:\\Windows\\Microsoft Media Session\\Windows Sessions Pause.exe\""	a6ce22418512c7abede5f27649562322.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3936660601-1848837011-2142350499-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Sounds EndPoints = "\"C:\\Windows\\Microsoft Media Session\\Windows Sessions Pause.exe\""	Windows Sessions Pause.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Windows Sounds EndPoints = "\"C:\\Windows\\Microsoft Media Session\\Windows Sessions Pause.exe\""	Windows Sessions Pause.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1468 set thread context of 3032	1468	Windows Sessions Pause.exe	94

Drops file in Windows directory 5 IoCs

description	ioc	Process
File created	C:\Windows\Microsoft Media Session\Windows Sessions Pause.exe	a6ce22418512c7abede5f27649562322.exe
File opened for modification	C:\Windows\Microsoft Media Session\Windows Sessions Pause.exe	a6ce22418512c7abede5f27649562322.exe
File opened for modification	C:\Windows\Microsoft Media Session	a6ce22418512c7abede5f27649562322.exe
File opened for modification	C:\Windows\Windows Display\logs.dat	iexplore.exe
File created	C:\Windows\Windows Display\logs.dat	iexplore.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
116	PING.EXE

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3032	iexplore.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3032	iexplore.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 620 wrote to memory of 1988	620	a6ce22418512c7abede5f27649562322.exe	88
PID 620 wrote to memory of 1988	620	a6ce22418512c7abede5f27649562322.exe	88
PID 620 wrote to memory of 1988	620	a6ce22418512c7abede5f27649562322.exe	88
PID 1988 wrote to memory of 116	1988	cmd.exe	90
PID 1988 wrote to memory of 116	1988	cmd.exe	90
PID 1988 wrote to memory of 116	1988	cmd.exe	90
PID 1988 wrote to memory of 1468	1988	cmd.exe	93
PID 1988 wrote to memory of 1468	1988	cmd.exe	93
PID 1988 wrote to memory of 1468	1988	cmd.exe	93
PID 1468 wrote to memory of 3032	1468	Windows Sessions Pause.exe	94
PID 1468 wrote to memory of 3032	1468	Windows Sessions Pause.exe	94
PID 1468 wrote to memory of 3032	1468	Windows Sessions Pause.exe	94
PID 1468 wrote to memory of 3032	1468	Windows Sessions Pause.exe	94
PID 1468 wrote to memory of 3032	1468	Windows Sessions Pause.exe	94
PID 1468 wrote to memory of 3032	1468	Windows Sessions Pause.exe	94
PID 1468 wrote to memory of 3032	1468	Windows Sessions Pause.exe	94
PID 1468 wrote to memory of 3032	1468	Windows Sessions Pause.exe	94
PID 1468 wrote to memory of 3032	1468	Windows Sessions Pause.exe	94

C:\Users\Admin\AppData\Local\Temp\a6ce22418512c7abede5f27649562322.exe
"C:\Users\Admin\AppData\Local\Temp\a6ce22418512c7abede5f27649562322.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:620
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\install.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1988
- - C:\Windows\SysWOW64\PING.EXE
    PING 127.0.0.1 -n 2
    3⤵
    - Runs ping.exe
    PID:116
- - C:\Windows\Microsoft Media Session\Windows Sessions Pause.exe
    "C:\Windows\Microsoft Media Session\Windows Sessions Pause.exe"
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1468
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
      4⤵
      Drops file in Windows directory
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of SetWindowsHookEx
      PID:3032

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

install.bat

Path C:\Users\Admin\AppData\Local\Temp\install.bat
Size 112B
SHA256 82c7dd3d4498fb810fbef28ee7109aacc5c907543fce34d0ecb0581d348f273f
MD5 16d43f67900d29e7d169c461947842fb
SHA1 92131de5ea0f5c62d494af93bc0f3cb18c24fc09
SHA512 0814cdbebd7bc8b0f663a502b591fbad5036112b720502dacf3412c14b723df8e123eaf9e64866b672bac1e3816b4c4844a546d82146440c78b5f5de0b50a1e1
MD5 SHA1 SHA512

Submit Download

Windows Sessions Pause.exe

Path C:\Windows\Microsoft Media Session\Windows Sessions Pause.exe
Size 92KB
SHA256 64d3136fc3cee6e521fe4e2f9b291a86d747da7a657ac0b8e3afdfd607627a6c
MD5 a6ce22418512c7abede5f27649562322
SHA1 168de059df20b07056fa19c9d52f73b1062b6d45
SHA512 0bd0ffc40705228e43293a781402f1d020be7522e144fe65a3774485dcc4802db0b20d47dfe2a303c38d3284f014110a9a6a6e4dcbf5583d8369129b2fe12f71
SSDEEP 1536:IhhW0YTGZWdVseJxaM9kraLdV2QkQ1TbPX8IHOCkIsI4ESHNTh9E+JP19qkP66r0:OhzYTGWVvJ8f2v1TbPzuMsIFSHNThy+C
MD5 SHA1 SHA512 SSDEEP

Submit Download

Windows Sessions Pause.exe

Path C:\Windows\Microsoft Media Session\Windows Sessions Pause.exe
Size 92KB
SHA256 64d3136fc3cee6e521fe4e2f9b291a86d747da7a657ac0b8e3afdfd607627a6c
MD5 a6ce22418512c7abede5f27649562322
SHA1 168de059df20b07056fa19c9d52f73b1062b6d45
SHA512 0bd0ffc40705228e43293a781402f1d020be7522e144fe65a3774485dcc4802db0b20d47dfe2a303c38d3284f014110a9a6a6e4dcbf5583d8369129b2fe12f71
SSDEEP 1536:IhhW0YTGZWdVseJxaM9kraLdV2QkQ1TbPX8IHOCkIsI4ESHNTh9E+JP19qkP66r0:OhzYTGWVvJ8f2v1TbPzuMsIFSHNThy+C
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/3032-9-0x0000000000400000-0x0000000000417000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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