remcos | 883a54ccd8c0af9a22ef5e853f8198dd5636e14f866e38acb878c44bccecafbe

General

Target

892-71-0x0000000000400000-0x0000000000417000-memory.exe
Size

92KB
MD5

8ae4e8ccedefbdfb9ca1aa0aec5930a9
SHA1

c95383e65365197a35c1546a09b72856ddaf3d48
SHA256

883a54ccd8c0af9a22ef5e853f8198dd5636e14f866e38acb878c44bccecafbe
SHA512

79c6a5dafd87408a829e3a080bc04c0198e96a8c5ccaf380364e6f7ca406fd844db82d02dbd2b54e21415b104ccca7d8a81ed06dcd19baaab0d785dcf21930ec
SSDEEP

1536:ghhW0YTGZWdVseJxaM9kraLdV2QkQ1TbPX8IHOCkIsI4ESHNTh9E+JP19qkP6Pr1:mhzYTGWVvJ8f2v1TbPzuMsIFSHNThy+i

Score

10^/10

remcos host persistence rat

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

C2

91.192.100.41:8600

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
remcos.exe
copy_folder
remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
true
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
remcos_oslegjhiewbgvzr
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screens
screenshot_path
%AppData%
screenshot_time
1
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

Executes dropped EXE 1 IoCs

pid	Process
952	remcos.exe

Loads dropped DLL 2 IoCs

pid	Process
1536	cmd.exe
1536	cmd.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\	892-71-0x0000000000400000-0x0000000000417000-memory.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\remcos.exe\""	892-71-0x0000000000400000-0x0000000000417000-memory.exe
Key created	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\	remcos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\remcos.exe\""	remcos.exe

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

System Information Discovery
T1082

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1964	PING.EXE

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 812 wrote to memory of 1536	812	892-71-0x0000000000400000-0x0000000000417000-memory.exe	27
PID 812 wrote to memory of 1536	812	892-71-0x0000000000400000-0x0000000000417000-memory.exe	27
PID 812 wrote to memory of 1536	812	892-71-0x0000000000400000-0x0000000000417000-memory.exe	27
PID 812 wrote to memory of 1536	812	892-71-0x0000000000400000-0x0000000000417000-memory.exe	27
PID 812 wrote to memory of 1536	812	892-71-0x0000000000400000-0x0000000000417000-memory.exe	27
PID 812 wrote to memory of 1536	812	892-71-0x0000000000400000-0x0000000000417000-memory.exe	27
PID 812 wrote to memory of 1536	812	892-71-0x0000000000400000-0x0000000000417000-memory.exe	27
PID 1536 wrote to memory of 1964	1536	cmd.exe	29
PID 1536 wrote to memory of 1964	1536	cmd.exe	29
PID 1536 wrote to memory of 1964	1536	cmd.exe	29
PID 1536 wrote to memory of 1964	1536	cmd.exe	29
PID 1536 wrote to memory of 952	1536	cmd.exe	30
PID 1536 wrote to memory of 952	1536	cmd.exe	30
PID 1536 wrote to memory of 952	1536	cmd.exe	30
PID 1536 wrote to memory of 952	1536	cmd.exe	30

C:\Users\Admin\AppData\Local\Temp\892-71-0x0000000000400000-0x0000000000417000-memory.exe
"C:\Users\Admin\AppData\Local\Temp\892-71-0x0000000000400000-0x0000000000417000-memory.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:812
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\install.bat" "
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1536
- - C:\Windows\SysWOW64\PING.EXE
    PING 127.0.0.1 -n 2
    3⤵
    - Runs ping.exe
    PID:1964
- - C:\Users\Admin\AppData\Roaming\remcos\remcos.exe
    "C:\Users\Admin\AppData\Roaming\remcos\remcos.exe"
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    PID:952

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

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

Replay Monitor

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Downloads

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

Filesize
99B

MD5
76c1687d97dfdbcea62ef1490bec5001

SHA1
5f4d1aeafa7d840cde67b76f97416dd68efd1bed

SHA256
79f04ea049979ffd2232c459fdd57fae97a5255aea9b4a2c7dce7ead856f37a4

SHA512
da250f0628632a644f159d818a82a8b9cca8224e46843bddbe0f6f9c32a2d04f7736a620af49ab6d77616317ca7d68285e60043965fe86c03d940835bd30a925

Download Submit
C:\Users\Admin\AppData\Roaming\remcos\remcos.exe

Filesize
92KB

MD5
8ae4e8ccedefbdfb9ca1aa0aec5930a9

SHA1
c95383e65365197a35c1546a09b72856ddaf3d48

SHA256
883a54ccd8c0af9a22ef5e853f8198dd5636e14f866e38acb878c44bccecafbe

SHA512
79c6a5dafd87408a829e3a080bc04c0198e96a8c5ccaf380364e6f7ca406fd844db82d02dbd2b54e21415b104ccca7d8a81ed06dcd19baaab0d785dcf21930ec

Download Submit
C:\Users\Admin\AppData\Roaming\remcos\remcos.exe

Filesize
92KB

MD5
8ae4e8ccedefbdfb9ca1aa0aec5930a9

SHA1
c95383e65365197a35c1546a09b72856ddaf3d48

SHA256
883a54ccd8c0af9a22ef5e853f8198dd5636e14f866e38acb878c44bccecafbe

SHA512
79c6a5dafd87408a829e3a080bc04c0198e96a8c5ccaf380364e6f7ca406fd844db82d02dbd2b54e21415b104ccca7d8a81ed06dcd19baaab0d785dcf21930ec

Download Submit
\Users\Admin\AppData\Roaming\remcos\remcos.exe

Filesize
92KB

MD5
8ae4e8ccedefbdfb9ca1aa0aec5930a9

SHA1
c95383e65365197a35c1546a09b72856ddaf3d48

SHA256
883a54ccd8c0af9a22ef5e853f8198dd5636e14f866e38acb878c44bccecafbe

SHA512
79c6a5dafd87408a829e3a080bc04c0198e96a8c5ccaf380364e6f7ca406fd844db82d02dbd2b54e21415b104ccca7d8a81ed06dcd19baaab0d785dcf21930ec

Download Submit
\Users\Admin\AppData\Roaming\remcos\remcos.exe

Filesize
92KB

MD5
8ae4e8ccedefbdfb9ca1aa0aec5930a9

SHA1
c95383e65365197a35c1546a09b72856ddaf3d48

SHA256
883a54ccd8c0af9a22ef5e853f8198dd5636e14f866e38acb878c44bccecafbe

SHA512
79c6a5dafd87408a829e3a080bc04c0198e96a8c5ccaf380364e6f7ca406fd844db82d02dbd2b54e21415b104ccca7d8a81ed06dcd19baaab0d785dcf21930ec

Download Submit
memory/812-54-0x0000000075131000-0x0000000075133000-memory.dmp

Filesize
8KB

Download

Analysis

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