remcos | 42aa64afaf836bf9a44554d469c52d65cb987edfbe66300cd92663d8f31a188c

General

Target

SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe
Size

1.3MB
MD5

11f7f0b849c355b95c7b127880ecf903
SHA1

ceae025a4bf73868f960fde6171595fcef86a8f7
SHA256

42aa64afaf836bf9a44554d469c52d65cb987edfbe66300cd92663d8f31a188c
SHA512

215c423e5ae52ab43d30442f5ca80eec8d76a02db9c9556805277825f8c9004d7a379f588a89e826bf4d8e1630dc6590922e17c0d940484ed388e7d5fb27156e
SSDEEP

24576:7fLWywQrYnpHJgvs6uQOxKsMJK/ArsF6C87wau9Iibt/DxX2ZyrzTzL7:7fLjjrY/Y/KIIX87wau9Tbt/8yHT

Score

10^/10

remcos xp persistence rat

Malware Config

Extracted

Family

remcos

Botnet

XP

C2

xpremcuz300622.ddns.net:3542

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
oos.exe
delete_file
false
hide_file
true
hide_keylog_file
false
install_flag
true
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Remcos-MMP2I7
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
kkl
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 3 IoCs

Processes:

oos.exeoos.exeoos.exe

pid process

4288 oos.exe
2844 oos.exe
3668 oos.exe

pid	process
4288	oos.exe
2844	oos.exe
3668	oos.exe

Checks computer location settings 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exeWScript.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	WScript.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

oos.exeSecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	oos.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	oos.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	oos.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows\CurrentVersion\Run\	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows\CurrentVersion\Run\	oos.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exeoos.exe

description	pid	process	target process
PID 3740 set thread context of 1076	3740	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe
PID 4288 set thread context of 3668	4288	oos.exe	oos.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

Processes:

SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000_Classes\Local Settings	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

oos.exe

pid process

4288 oos.exe
4288 oos.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

oos.exe

description pid process

Token: SeDebugPrivilege 4288 oos.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

oos.exe

pid process

3668 oos.exe

pid	process
4288	oos.exe
4288	oos.exe

description	pid	process
Token: SeDebugPrivilege	4288	oos.exe

pid	process
3668	oos.exe

Suspicious use of WriteProcessMemory 36 IoCs

Processes:

SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exeSecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exeWScript.execmd.exeoos.exe

description	pid	process	target process
PID 3740 wrote to memory of 1076	3740	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe
PID 3740 wrote to memory of 1076	3740	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe
PID 3740 wrote to memory of 1076	3740	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe
PID 3740 wrote to memory of 1076	3740	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe
PID 3740 wrote to memory of 1076	3740	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe
PID 3740 wrote to memory of 1076	3740	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe
PID 3740 wrote to memory of 1076	3740	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe
PID 3740 wrote to memory of 1076	3740	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe
PID 3740 wrote to memory of 1076	3740	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe
PID 3740 wrote to memory of 1076	3740	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe
PID 3740 wrote to memory of 1076	3740	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe
PID 3740 wrote to memory of 1076	3740	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe
PID 1076 wrote to memory of 4956	1076	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe	WScript.exe
PID 1076 wrote to memory of 4956	1076	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe	WScript.exe
PID 1076 wrote to memory of 4956	1076	SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe	WScript.exe
PID 4956 wrote to memory of 2400	4956	WScript.exe	cmd.exe
PID 4956 wrote to memory of 2400	4956	WScript.exe	cmd.exe
PID 4956 wrote to memory of 2400	4956	WScript.exe	cmd.exe
PID 2400 wrote to memory of 4288	2400	cmd.exe	oos.exe
PID 2400 wrote to memory of 4288	2400	cmd.exe	oos.exe
PID 2400 wrote to memory of 4288	2400	cmd.exe	oos.exe
PID 4288 wrote to memory of 2844	4288	oos.exe	oos.exe
PID 4288 wrote to memory of 2844	4288	oos.exe	oos.exe
PID 4288 wrote to memory of 2844	4288	oos.exe	oos.exe
PID 4288 wrote to memory of 3668	4288	oos.exe	oos.exe
PID 4288 wrote to memory of 3668	4288	oos.exe	oos.exe
PID 4288 wrote to memory of 3668	4288	oos.exe	oos.exe
PID 4288 wrote to memory of 3668	4288	oos.exe	oos.exe
PID 4288 wrote to memory of 3668	4288	oos.exe	oos.exe
PID 4288 wrote to memory of 3668	4288	oos.exe	oos.exe
PID 4288 wrote to memory of 3668	4288	oos.exe	oos.exe
PID 4288 wrote to memory of 3668	4288	oos.exe	oos.exe
PID 4288 wrote to memory of 3668	4288	oos.exe	oos.exe
PID 4288 wrote to memory of 3668	4288	oos.exe	oos.exe
PID 4288 wrote to memory of 3668	4288	oos.exe	oos.exe
PID 4288 wrote to memory of 3668	4288	oos.exe	oos.exe

C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe
"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3740

C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe
"{path}"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1076

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
3⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4956

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\oos.exe"
4⤵
- Suspicious use of WriteProcessMemory
PID:2400

C:\Users\Admin\AppData\Roaming\oos.exe
C:\Users\Admin\AppData\Roaming\oos.exe
5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4288

C:\Users\Admin\AppData\Roaming\oos.exe
"{path}"
6⤵
- Executes dropped EXE
PID:2844

C:\Users\Admin\AppData\Roaming\oos.exe
"{path}"
6⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetWindowsHookEx
PID:3668

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\install.vbs
Filesize
398B

MD5
a5d3440f90cbfae712166e20870eaed7

SHA1
cc1e1a2945eb2ad475234344f7527ad9e9873647

SHA256
960a570da95b8d16809cbcc18e8ca4d81e16cb666354ddc1d572daf93f291f02

SHA512
d3136a280fbb326ccc5cb5ab1214aed8ccd6baa7f3f89ef9e0b5bf391a957dab2c121640bb056e6cbda0594f83133c4dbb4e1e2f0e290b44a401cd2cf8cfd4aa

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
1.3MB

MD5
11f7f0b849c355b95c7b127880ecf903

SHA1
ceae025a4bf73868f960fde6171595fcef86a8f7

SHA256
42aa64afaf836bf9a44554d469c52d65cb987edfbe66300cd92663d8f31a188c

SHA512
215c423e5ae52ab43d30442f5ca80eec8d76a02db9c9556805277825f8c9004d7a379f588a89e826bf4d8e1630dc6590922e17c0d940484ed388e7d5fb27156e

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
1.3MB

MD5
11f7f0b849c355b95c7b127880ecf903

SHA1
ceae025a4bf73868f960fde6171595fcef86a8f7

SHA256
42aa64afaf836bf9a44554d469c52d65cb987edfbe66300cd92663d8f31a188c

SHA512
215c423e5ae52ab43d30442f5ca80eec8d76a02db9c9556805277825f8c9004d7a379f588a89e826bf4d8e1630dc6590922e17c0d940484ed388e7d5fb27156e

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
1.3MB

MD5
11f7f0b849c355b95c7b127880ecf903

SHA1
ceae025a4bf73868f960fde6171595fcef86a8f7

SHA256
42aa64afaf836bf9a44554d469c52d65cb987edfbe66300cd92663d8f31a188c

SHA512
215c423e5ae52ab43d30442f5ca80eec8d76a02db9c9556805277825f8c9004d7a379f588a89e826bf4d8e1630dc6590922e17c0d940484ed388e7d5fb27156e

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
1.3MB

MD5
11f7f0b849c355b95c7b127880ecf903

SHA1
ceae025a4bf73868f960fde6171595fcef86a8f7

SHA256
42aa64afaf836bf9a44554d469c52d65cb987edfbe66300cd92663d8f31a188c

SHA512
215c423e5ae52ab43d30442f5ca80eec8d76a02db9c9556805277825f8c9004d7a379f588a89e826bf4d8e1630dc6590922e17c0d940484ed388e7d5fb27156e

Download Submit
memory/1076-138-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1076-139-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1076-140-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1076-142-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1076-137-0x0000000000000000-mapping.dmp

Download
memory/1076-148-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2400-144-0x0000000000000000-mapping.dmp

Download
memory/2844-149-0x0000000000000000-mapping.dmp

Download
memory/3668-151-0x0000000000000000-mapping.dmp

Download
memory/3668-157-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3668-156-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3668-155-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3668-154-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3740-136-0x0000000004B10000-0x0000000004B1A000-memory.dmp

Filesize
40KB

Download
memory/3740-134-0x0000000004B50000-0x0000000004BE2000-memory.dmp

Filesize
584KB

Download
memory/3740-135-0x0000000004BF0000-0x0000000004C8C000-memory.dmp

Filesize
624KB

Download
memory/3740-132-0x0000000000040000-0x0000000000190000-memory.dmp

Filesize
1.3MB

Download
memory/3740-133-0x0000000005060000-0x0000000005604000-memory.dmp

Filesize
5.6MB

Download
memory/4288-145-0x0000000000000000-mapping.dmp

Download
memory/4956-141-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads