remcos | 6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580

General

Target

6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
Size

1020KB
MD5

3d87e610c1e0855bac84e1a66632afd5
SHA1

998433cdb154c12a50aac7fd3f174bb2da931496
SHA256

6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580
SHA512

e8e091be06cd3c16b84b36b219b5a3980dd529f78c591a35d75c18b2bdd9d811cf978a893cfee47568a74139579266330de04714e2c9f5473824d20a3cc8a21d
SSDEEP

24576:fkkU1nC/RckNg7iDLB/a18rYgaJvw4HTGFmF:fk3C/RckuODL1EgaZwCTV

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

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:

6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exeWScript.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 3 IoCs

Processes:

oos.exeoos.exeoos.exe

pid process

2588 oos.exe
3212 oos.exe
4260 oos.exe

pid	process
2588	oos.exe
3212	oos.exe
4260	oos.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exeoos.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Windows\CurrentVersion\Run\	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Windows\CurrentVersion\Run\	oos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\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

Suspicious use of SetThreadContext 2 IoCs

Processes:

6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exeoos.exe

description	pid	process	target process
PID 1280 set thread context of 4872	1280	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
PID 2588 set thread context of 4260	2588	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:

6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

oos.exe

pid process

2588 oos.exe
2588 oos.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

oos.exe

description pid process

Token: SeDebugPrivilege 2588 oos.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

oos.exe

pid process

4260 oos.exe

pid	process
2588	oos.exe
2588	oos.exe

description	pid	process
Token: SeDebugPrivilege	2588	oos.exe

pid	process
4260	oos.exe

Suspicious use of WriteProcessMemory 36 IoCs

Processes:

6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exeWScript.execmd.exeoos.exe

description	pid	process	target process
PID 1280 wrote to memory of 4872	1280	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
PID 1280 wrote to memory of 4872	1280	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
PID 1280 wrote to memory of 4872	1280	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
PID 1280 wrote to memory of 4872	1280	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
PID 1280 wrote to memory of 4872	1280	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
PID 1280 wrote to memory of 4872	1280	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
PID 1280 wrote to memory of 4872	1280	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
PID 1280 wrote to memory of 4872	1280	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
PID 1280 wrote to memory of 4872	1280	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
PID 1280 wrote to memory of 4872	1280	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
PID 1280 wrote to memory of 4872	1280	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
PID 1280 wrote to memory of 4872	1280	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
PID 4872 wrote to memory of 4488	4872	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe	WScript.exe
PID 4872 wrote to memory of 4488	4872	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe	WScript.exe
PID 4872 wrote to memory of 4488	4872	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe	WScript.exe
PID 4488 wrote to memory of 1968	4488	WScript.exe	cmd.exe
PID 4488 wrote to memory of 1968	4488	WScript.exe	cmd.exe
PID 4488 wrote to memory of 1968	4488	WScript.exe	cmd.exe
PID 1968 wrote to memory of 2588	1968	cmd.exe	oos.exe
PID 1968 wrote to memory of 2588	1968	cmd.exe	oos.exe
PID 1968 wrote to memory of 2588	1968	cmd.exe	oos.exe
PID 2588 wrote to memory of 3212	2588	oos.exe	oos.exe
PID 2588 wrote to memory of 3212	2588	oos.exe	oos.exe
PID 2588 wrote to memory of 3212	2588	oos.exe	oos.exe
PID 2588 wrote to memory of 4260	2588	oos.exe	oos.exe
PID 2588 wrote to memory of 4260	2588	oos.exe	oos.exe
PID 2588 wrote to memory of 4260	2588	oos.exe	oos.exe
PID 2588 wrote to memory of 4260	2588	oos.exe	oos.exe
PID 2588 wrote to memory of 4260	2588	oos.exe	oos.exe
PID 2588 wrote to memory of 4260	2588	oos.exe	oos.exe
PID 2588 wrote to memory of 4260	2588	oos.exe	oos.exe
PID 2588 wrote to memory of 4260	2588	oos.exe	oos.exe
PID 2588 wrote to memory of 4260	2588	oos.exe	oos.exe
PID 2588 wrote to memory of 4260	2588	oos.exe	oos.exe
PID 2588 wrote to memory of 4260	2588	oos.exe	oos.exe
PID 2588 wrote to memory of 4260	2588	oos.exe	oos.exe

C:\Users\Admin\AppData\Local\Temp\6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
"C:\Users\Admin\AppData\Local\Temp\6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1280

C:\Users\Admin\AppData\Local\Temp\6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
"C:\Users\Admin\AppData\Local\Temp\6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4872

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:4488

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\oos.exe"
4⤵
- Suspicious use of WriteProcessMemory
PID:1968

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:2588

C:\Users\Admin\AppData\Roaming\oos.exe
"C:\Users\Admin\AppData\Roaming\oos.exe"
6⤵
- Executes dropped EXE
PID:3212

C:\Users\Admin\AppData\Roaming\oos.exe
"C:\Users\Admin\AppData\Roaming\oos.exe"
6⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetWindowsHookEx
PID:4260

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:\ProgramData\remcos\logs.dat
Filesize
144B

MD5
a36afcc0b204ca6c86b5e9a317dcd7d6

SHA1
cae8114b3a6cc04a93045cf6fe7d4ee96e3a684b

SHA256
27f0734697a0ccd2331d1536741f6bdd0c5b0e34a0ded8cb12f8b2fc651f310e

SHA512
8619b1f49be7bfe1e6752c84c556fc0aabfec5c9e6b53a6e93b47c54fcdee60046ec19b418604756c724e533fb91b04847ef5293177d6a7f05808815bc684fdf

Download Submit
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
1020KB

MD5
3d87e610c1e0855bac84e1a66632afd5

SHA1
998433cdb154c12a50aac7fd3f174bb2da931496

SHA256
6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580

SHA512
e8e091be06cd3c16b84b36b219b5a3980dd529f78c591a35d75c18b2bdd9d811cf978a893cfee47568a74139579266330de04714e2c9f5473824d20a3cc8a21d

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
1020KB

MD5
3d87e610c1e0855bac84e1a66632afd5

SHA1
998433cdb154c12a50aac7fd3f174bb2da931496

SHA256
6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580

SHA512
e8e091be06cd3c16b84b36b219b5a3980dd529f78c591a35d75c18b2bdd9d811cf978a893cfee47568a74139579266330de04714e2c9f5473824d20a3cc8a21d

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
1020KB

MD5
3d87e610c1e0855bac84e1a66632afd5

SHA1
998433cdb154c12a50aac7fd3f174bb2da931496

SHA256
6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580

SHA512
e8e091be06cd3c16b84b36b219b5a3980dd529f78c591a35d75c18b2bdd9d811cf978a893cfee47568a74139579266330de04714e2c9f5473824d20a3cc8a21d

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
1020KB

MD5
3d87e610c1e0855bac84e1a66632afd5

SHA1
998433cdb154c12a50aac7fd3f174bb2da931496

SHA256
6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580

SHA512
e8e091be06cd3c16b84b36b219b5a3980dd529f78c591a35d75c18b2bdd9d811cf978a893cfee47568a74139579266330de04714e2c9f5473824d20a3cc8a21d

Download Submit
memory/1280-136-0x0000000005520000-0x000000000552A000-memory.dmp

Filesize
40KB

Download
memory/1280-139-0x0000000007270000-0x000000000730C000-memory.dmp

Filesize
624KB

Download
memory/1280-133-0x0000000000A50000-0x0000000000B54000-memory.dmp

Filesize
1.0MB

Download
memory/1280-138-0x00000000057D0000-0x00000000057E0000-memory.dmp

Filesize
64KB

Download
memory/1280-137-0x00000000057D0000-0x00000000057E0000-memory.dmp

Filesize
64KB

Download
memory/1280-135-0x0000000005570000-0x0000000005602000-memory.dmp

Filesize
584KB

Download
memory/1280-134-0x0000000005A80000-0x0000000006024000-memory.dmp

Filesize
5.6MB

Download
memory/2588-155-0x0000000005420000-0x0000000005430000-memory.dmp

Filesize
64KB

Download
memory/4260-164-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4260-169-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4260-179-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4260-178-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4260-159-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4260-161-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4260-162-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4260-173-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4260-165-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4260-166-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4260-172-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4872-150-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4872-142-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4872-140-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4872-143-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4872-147-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads