remcos | fdbdb240f8a3257d858f92cb4d8019f89e951069f0b233a0b6c77acb38603ede

General

Target

2744-28-0x0000000000400000-0x0000000000417000-memory.exe
Size

92KB
MD5

76cc8e284837cbf99ba063fdca261590
SHA1

5713d6267f2ebb8d3b1ccd0e9349225011ae71af
SHA256

fdbdb240f8a3257d858f92cb4d8019f89e951069f0b233a0b6c77acb38603ede
SHA512

f3964eb9fcd0031311647ae999551af31a1c04380da02ba6cbf4d97aad7a3e8e23ec22fb4694ca0fdc7b5ba9c67dac6bce49021f51235ba2381dee6970587b52
SSDEEP

1536:ohhW0YTGZWdVseJxaM9kraLdV2QkQ1TbPX8IHOCkIsI4ESHNTh9E+JP19qkP6krl:uhzYTGWVvJ8f2v1TbPzuMsIFSHNThy+B

Score

10^/10

remcos turk summer persistence rat

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Turk Summer

C2

ascoitaliasasummer.duckdns.org:4045

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
Windows Session Start.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 Sound 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

Executes dropped EXE 1 IoCs

pid	Process
4416	Windows Session Start.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-1-5-21-4176143399-3250363947-192774652-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Sound EndPoints = "\"C:\\Windows\\Microsoft Media Session\\Windows Session Start.exe\""	2744-28-0x0000000000400000-0x0000000000417000-memory.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Windows Sound EndPoints = "\"C:\\Windows\\Microsoft Media Session\\Windows Session Start.exe\""	2744-28-0x0000000000400000-0x0000000000417000-memory.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4176143399-3250363947-192774652-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Sound EndPoints = "\"C:\\Windows\\Microsoft Media Session\\Windows Session Start.exe\""	Windows Session Start.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Windows Sound EndPoints = "\"C:\\Windows\\Microsoft Media Session\\Windows Session Start.exe\""	Windows Session Start.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4416 set thread context of 1548	4416	Windows Session Start.exe	86

Drops file in Windows directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Microsoft Media Session\Windows Session Start.exe	2744-28-0x0000000000400000-0x0000000000417000-memory.exe
File opened for modification	C:\Windows\Microsoft Media Session	2744-28-0x0000000000400000-0x0000000000417000-memory.exe
File opened for modification	C:\Windows\Windows Display\logs.dat	iexplore.exe
File created	C:\Windows\Windows Display\logs.dat	iexplore.exe
File created	C:\Windows\Microsoft Media Session\Windows Session Start.exe	2744-28-0x0000000000400000-0x0000000000417000-memory.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
3136	PING.EXE

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1548	iexplore.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1548	iexplore.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1540 wrote to memory of 3408	1540	2744-28-0x0000000000400000-0x0000000000417000-memory.exe	81
PID 1540 wrote to memory of 3408	1540	2744-28-0x0000000000400000-0x0000000000417000-memory.exe	81
PID 1540 wrote to memory of 3408	1540	2744-28-0x0000000000400000-0x0000000000417000-memory.exe	81
PID 3408 wrote to memory of 3136	3408	cmd.exe	83
PID 3408 wrote to memory of 3136	3408	cmd.exe	83
PID 3408 wrote to memory of 3136	3408	cmd.exe	83
PID 3408 wrote to memory of 4416	3408	cmd.exe	85
PID 3408 wrote to memory of 4416	3408	cmd.exe	85
PID 3408 wrote to memory of 4416	3408	cmd.exe	85
PID 4416 wrote to memory of 1548	4416	Windows Session Start.exe	86
PID 4416 wrote to memory of 1548	4416	Windows Session Start.exe	86
PID 4416 wrote to memory of 1548	4416	Windows Session Start.exe	86
PID 4416 wrote to memory of 1548	4416	Windows Session Start.exe	86
PID 4416 wrote to memory of 1548	4416	Windows Session Start.exe	86
PID 4416 wrote to memory of 1548	4416	Windows Session Start.exe	86
PID 4416 wrote to memory of 1548	4416	Windows Session Start.exe	86
PID 4416 wrote to memory of 1548	4416	Windows Session Start.exe	86
PID 4416 wrote to memory of 1548	4416	Windows Session Start.exe	86

C:\Users\Admin\AppData\Local\Temp\2744-28-0x0000000000400000-0x0000000000417000-memory.exe
"C:\Users\Admin\AppData\Local\Temp\2744-28-0x0000000000400000-0x0000000000417000-memory.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1540
- 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:3408
- - C:\Windows\SysWOW64\PING.EXE
    PING 127.0.0.1 -n 2
    3⤵
    - Runs ping.exe
    PID:3136
- - C:\Windows\Microsoft Media Session\Windows Session Start.exe
    "C:\Windows\Microsoft Media Session\Windows Session Start.exe"
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4416
  - - 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:1548

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

Remote System Discovery

1

T1018

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\install.bat

Filesize
111B

MD5
7fe5a8c6b904f70919d38c7170e201de

SHA1
68b95c26da83c89c1aaafe1337c42759fd99d4aa

SHA256
4b1774ffddb1debe67e8938724d2dc873b5a4e174735065935c13a1078c41fa4

SHA512
a6bfc1eeec4466d51375d025fcb082c799b008ad56dc073d0462604f5413d9499822fb61434a4b3773c530c3b756236eed0cf4f372699d8eb1eda99b29e291df

Download Submit
C:\Windows\Microsoft Media Session\Windows Session Start.exe

Filesize
92KB

MD5
76cc8e284837cbf99ba063fdca261590

SHA1
5713d6267f2ebb8d3b1ccd0e9349225011ae71af

SHA256
fdbdb240f8a3257d858f92cb4d8019f89e951069f0b233a0b6c77acb38603ede

SHA512
f3964eb9fcd0031311647ae999551af31a1c04380da02ba6cbf4d97aad7a3e8e23ec22fb4694ca0fdc7b5ba9c67dac6bce49021f51235ba2381dee6970587b52

Download Submit
C:\Windows\Microsoft Media Session\Windows Session Start.exe

Filesize
92KB

MD5
76cc8e284837cbf99ba063fdca261590

SHA1
5713d6267f2ebb8d3b1ccd0e9349225011ae71af

SHA256
fdbdb240f8a3257d858f92cb4d8019f89e951069f0b233a0b6c77acb38603ede

SHA512
f3964eb9fcd0031311647ae999551af31a1c04380da02ba6cbf4d97aad7a3e8e23ec22fb4694ca0fdc7b5ba9c67dac6bce49021f51235ba2381dee6970587b52

Download Submit
memory/1548-9-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads