remcos | c15faefe36124624292ccddfb64d743c3f7bb1cab2788d09edd0b496af9c8512

General

Target

REQUEST_.exe
Size

835KB
MD5

0caf4f8bc47dc7226740d023f654e937
SHA1

eea58b2403f0aaf088b272b948eeaaf6f87009cc
SHA256

0d8783b653d2a02641f6b7684378b57a5cc6e1cf72521c0a0f378b1c6e74e618
SHA512

3cacca879960ca9b9c12fd0bdd72c81b98601c33d531fb24bb259d6c45f09f23e1f6a5a0720af5236d2239d83b62eaf315bd1b39e9ed67a73828318f1155e268
SSDEEP

12288:rEVv2iNsAJ8YQNb4tQ3y/Q7AJFGWYKJH0bOt1BNvn1C0XtaPwL/UL6hDRgkADe:YF1nCNb4ucQ0JbY83nvn1C0UMg6hDRj

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 2 IoCs

Processes:

oos.exeoos.exe

pid process

3680 oos.exe
3656 oos.exe

pid	process
3680	oos.exe
3656	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:

REQUEST_.exeWScript.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	REQUEST_.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\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.exeREQUEST_.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\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-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows\CurrentVersion\Run\	REQUEST_.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	REQUEST_.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	REQUEST_.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	REQUEST_.exe
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows\CurrentVersion\Run\	oos.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

REQUEST_.exeoos.exe

description	pid	process	target process
PID 4616 set thread context of 1456	4616	REQUEST_.exe	REQUEST_.exe
PID 3680 set thread context of 3656	3680	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:

REQUEST_.exe

description ioc process

Key created \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000_Classes\Local Settings REQUEST_.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

oos.exe

pid process

3656 oos.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000_Classes\Local Settings	REQUEST_.exe

pid	process
3656	oos.exe

Suspicious use of WriteProcessMemory 33 IoCs

Processes:

REQUEST_.exeREQUEST_.exeWScript.execmd.exeoos.exe

description	pid	process	target process
PID 4616 wrote to memory of 1456	4616	REQUEST_.exe	REQUEST_.exe
PID 4616 wrote to memory of 1456	4616	REQUEST_.exe	REQUEST_.exe
PID 4616 wrote to memory of 1456	4616	REQUEST_.exe	REQUEST_.exe
PID 4616 wrote to memory of 1456	4616	REQUEST_.exe	REQUEST_.exe
PID 4616 wrote to memory of 1456	4616	REQUEST_.exe	REQUEST_.exe
PID 4616 wrote to memory of 1456	4616	REQUEST_.exe	REQUEST_.exe
PID 4616 wrote to memory of 1456	4616	REQUEST_.exe	REQUEST_.exe
PID 4616 wrote to memory of 1456	4616	REQUEST_.exe	REQUEST_.exe
PID 4616 wrote to memory of 1456	4616	REQUEST_.exe	REQUEST_.exe
PID 4616 wrote to memory of 1456	4616	REQUEST_.exe	REQUEST_.exe
PID 4616 wrote to memory of 1456	4616	REQUEST_.exe	REQUEST_.exe
PID 4616 wrote to memory of 1456	4616	REQUEST_.exe	REQUEST_.exe
PID 1456 wrote to memory of 1324	1456	REQUEST_.exe	WScript.exe
PID 1456 wrote to memory of 1324	1456	REQUEST_.exe	WScript.exe
PID 1456 wrote to memory of 1324	1456	REQUEST_.exe	WScript.exe
PID 1324 wrote to memory of 1836	1324	WScript.exe	cmd.exe
PID 1324 wrote to memory of 1836	1324	WScript.exe	cmd.exe
PID 1324 wrote to memory of 1836	1324	WScript.exe	cmd.exe
PID 1836 wrote to memory of 3680	1836	cmd.exe	oos.exe
PID 1836 wrote to memory of 3680	1836	cmd.exe	oos.exe
PID 1836 wrote to memory of 3680	1836	cmd.exe	oos.exe
PID 3680 wrote to memory of 3656	3680	oos.exe	oos.exe
PID 3680 wrote to memory of 3656	3680	oos.exe	oos.exe
PID 3680 wrote to memory of 3656	3680	oos.exe	oos.exe
PID 3680 wrote to memory of 3656	3680	oos.exe	oos.exe
PID 3680 wrote to memory of 3656	3680	oos.exe	oos.exe
PID 3680 wrote to memory of 3656	3680	oos.exe	oos.exe
PID 3680 wrote to memory of 3656	3680	oos.exe	oos.exe
PID 3680 wrote to memory of 3656	3680	oos.exe	oos.exe
PID 3680 wrote to memory of 3656	3680	oos.exe	oos.exe
PID 3680 wrote to memory of 3656	3680	oos.exe	oos.exe
PID 3680 wrote to memory of 3656	3680	oos.exe	oos.exe
PID 3680 wrote to memory of 3656	3680	oos.exe	oos.exe

C:\Users\Admin\AppData\Local\Temp\REQUEST_.exe
"C:\Users\Admin\AppData\Local\Temp\REQUEST_.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4616

C:\Users\Admin\AppData\Local\Temp\REQUEST_.exe
"{path}"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1456

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:1324

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\oos.exe"
4⤵
- Suspicious use of WriteProcessMemory
PID:1836

C:\Users\Admin\AppData\Roaming\oos.exe
C:\Users\Admin\AppData\Roaming\oos.exe
5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3680

C:\Users\Admin\AppData\Roaming\oos.exe
"{path}"
6⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetWindowsHookEx
PID:3656

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
835KB

MD5
0caf4f8bc47dc7226740d023f654e937

SHA1
eea58b2403f0aaf088b272b948eeaaf6f87009cc

SHA256
0d8783b653d2a02641f6b7684378b57a5cc6e1cf72521c0a0f378b1c6e74e618

SHA512
3cacca879960ca9b9c12fd0bdd72c81b98601c33d531fb24bb259d6c45f09f23e1f6a5a0720af5236d2239d83b62eaf315bd1b39e9ed67a73828318f1155e268

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
835KB

MD5
0caf4f8bc47dc7226740d023f654e937

SHA1
eea58b2403f0aaf088b272b948eeaaf6f87009cc

SHA256
0d8783b653d2a02641f6b7684378b57a5cc6e1cf72521c0a0f378b1c6e74e618

SHA512
3cacca879960ca9b9c12fd0bdd72c81b98601c33d531fb24bb259d6c45f09f23e1f6a5a0720af5236d2239d83b62eaf315bd1b39e9ed67a73828318f1155e268

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
835KB

MD5
0caf4f8bc47dc7226740d023f654e937

SHA1
eea58b2403f0aaf088b272b948eeaaf6f87009cc

SHA256
0d8783b653d2a02641f6b7684378b57a5cc6e1cf72521c0a0f378b1c6e74e618

SHA512
3cacca879960ca9b9c12fd0bdd72c81b98601c33d531fb24bb259d6c45f09f23e1f6a5a0720af5236d2239d83b62eaf315bd1b39e9ed67a73828318f1155e268

Download Submit
memory/1324-141-0x0000000000000000-mapping.dmp

Download
memory/1456-137-0x0000000000000000-mapping.dmp

Download
memory/1456-139-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1456-140-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1456-138-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1456-142-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1836-144-0x0000000000000000-mapping.dmp

Download
memory/3656-151-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3656-148-0x0000000000000000-mapping.dmp

Download
memory/3656-152-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3656-153-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3656-154-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3680-145-0x0000000000000000-mapping.dmp

Download
memory/4616-136-0x0000000005540000-0x000000000554A000-memory.dmp

Filesize
40KB

Download
memory/4616-135-0x0000000005660000-0x00000000056FC000-memory.dmp

Filesize
624KB

Download
memory/4616-134-0x00000000055C0000-0x0000000005652000-memory.dmp

Filesize
584KB

Download
memory/4616-132-0x0000000000AD0000-0x0000000000BA6000-memory.dmp

Filesize
856KB

Download
memory/4616-133-0x0000000005B70000-0x0000000006114000-memory.dmp

Filesize
5.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads