remcos | 6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580

Analysis

max time kernel
97s
max time network
34s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
03-04-2023 12:58

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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

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 6 IoCs

Processes:

oos.exeoos.exeoos.exeoos.exeoos.exeoos.exe

pid process

576 oos.exe
1788 oos.exe
1940 oos.exe
1224 oos.exe
816 oos.exe
1688 oos.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

1776 cmd.exe

pid	process
576	oos.exe
1788	oos.exe
1940	oos.exe
1224	oos.exe
816	oos.exe
1688	oos.exe

pid	process
1776	cmd.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000\Software\Microsoft\Windows\CurrentVersion\Run\	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000\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

Suspicious use of SetThreadContext 1 IoCs

Processes:

6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe

description	pid	process	target process
PID 1544 set thread context of 336	1544	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe

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

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

oos.exe

pid process

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

Processes:

oos.exe

description pid process

Token: SeDebugPrivilege 576 oos.exe

pid	process
576	oos.exe
576	oos.exe
576	oos.exe
576	oos.exe
576	oos.exe

description	pid	process
Token: SeDebugPrivilege	576	oos.exe

Suspicious use of WriteProcessMemory 45 IoCs

Processes:

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

description	pid	process	target process
PID 1544 wrote to memory of 336	1544	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
PID 1544 wrote to memory of 336	1544	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
PID 1544 wrote to memory of 336	1544	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
PID 1544 wrote to memory of 336	1544	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
PID 1544 wrote to memory of 336	1544	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
PID 1544 wrote to memory of 336	1544	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
PID 1544 wrote to memory of 336	1544	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
PID 1544 wrote to memory of 336	1544	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
PID 1544 wrote to memory of 336	1544	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
PID 1544 wrote to memory of 336	1544	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
PID 1544 wrote to memory of 336	1544	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
PID 1544 wrote to memory of 336	1544	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
PID 1544 wrote to memory of 336	1544	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
PID 336 wrote to memory of 1356	336	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe	WScript.exe
PID 336 wrote to memory of 1356	336	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe	WScript.exe
PID 336 wrote to memory of 1356	336	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe	WScript.exe
PID 336 wrote to memory of 1356	336	6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe	WScript.exe
PID 1356 wrote to memory of 1776	1356	WScript.exe	cmd.exe
PID 1356 wrote to memory of 1776	1356	WScript.exe	cmd.exe
PID 1356 wrote to memory of 1776	1356	WScript.exe	cmd.exe
PID 1356 wrote to memory of 1776	1356	WScript.exe	cmd.exe
PID 1776 wrote to memory of 576	1776	cmd.exe	oos.exe
PID 1776 wrote to memory of 576	1776	cmd.exe	oos.exe
PID 1776 wrote to memory of 576	1776	cmd.exe	oos.exe
PID 1776 wrote to memory of 576	1776	cmd.exe	oos.exe
PID 576 wrote to memory of 1788	576	oos.exe	oos.exe
PID 576 wrote to memory of 1788	576	oos.exe	oos.exe
PID 576 wrote to memory of 1788	576	oos.exe	oos.exe
PID 576 wrote to memory of 1788	576	oos.exe	oos.exe
PID 576 wrote to memory of 1940	576	oos.exe	oos.exe
PID 576 wrote to memory of 1940	576	oos.exe	oos.exe
PID 576 wrote to memory of 1940	576	oos.exe	oos.exe
PID 576 wrote to memory of 1940	576	oos.exe	oos.exe
PID 576 wrote to memory of 1224	576	oos.exe	oos.exe
PID 576 wrote to memory of 1224	576	oos.exe	oos.exe
PID 576 wrote to memory of 1224	576	oos.exe	oos.exe
PID 576 wrote to memory of 1224	576	oos.exe	oos.exe
PID 576 wrote to memory of 816	576	oos.exe	oos.exe
PID 576 wrote to memory of 816	576	oos.exe	oos.exe
PID 576 wrote to memory of 816	576	oos.exe	oos.exe
PID 576 wrote to memory of 816	576	oos.exe	oos.exe
PID 576 wrote to memory of 1688	576	oos.exe	oos.exe
PID 576 wrote to memory of 1688	576	oos.exe	oos.exe
PID 576 wrote to memory of 1688	576	oos.exe	oos.exe
PID 576 wrote to memory of 1688	576	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:1544

C:\Users\Admin\AppData\Local\Temp\6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe
"C:\Users\Admin\AppData\Local\Temp\6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580.exe"
2⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:336

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
3⤵
- Suspicious use of WriteProcessMemory
PID:1356

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\oos.exe"
4⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1776

C:\Users\Admin\AppData\Roaming\oos.exe
C:\Users\Admin\AppData\Roaming\oos.exe
5⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:576

C:\Users\Admin\AppData\Roaming\oos.exe
"C:\Users\Admin\AppData\Roaming\oos.exe"
6⤵
- Executes dropped EXE
PID:1788

C:\Users\Admin\AppData\Roaming\oos.exe
"C:\Users\Admin\AppData\Roaming\oos.exe"
6⤵
- Executes dropped EXE
PID:1688

C:\Users\Admin\AppData\Roaming\oos.exe
"C:\Users\Admin\AppData\Roaming\oos.exe"
6⤵
- Executes dropped EXE
PID:816

C:\Users\Admin\AppData\Roaming\oos.exe
"C:\Users\Admin\AppData\Roaming\oos.exe"
6⤵
- Executes dropped EXE
PID:1224

C:\Users\Admin\AppData\Roaming\oos.exe
"C:\Users\Admin\AppData\Roaming\oos.exe"
6⤵
- Executes dropped EXE
PID:1940

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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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
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
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
\Users\Admin\AppData\Roaming\oos.exe
Filesize
1020KB

MD5
3d87e610c1e0855bac84e1a66632afd5

SHA1
998433cdb154c12a50aac7fd3f174bb2da931496

SHA256
6f156a6c661f4b68eb1be00e5a1be53fb80f05af516ef4dcdd7d3e937a1db580

SHA512
e8e091be06cd3c16b84b36b219b5a3980dd529f78c591a35d75c18b2bdd9d811cf978a893cfee47568a74139579266330de04714e2c9f5473824d20a3cc8a21d

Download Submit
memory/336-70-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/336-62-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/336-65-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/336-66-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/336-67-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/336-68-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/336-69-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/336-61-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/336-72-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/336-78-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/336-63-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/336-64-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/576-83-0x0000000000350000-0x0000000000454000-memory.dmp

Filesize
1.0MB

Download
memory/576-84-0x00000000002E0000-0x00000000002F4000-memory.dmp

Filesize
80KB

Download
memory/576-85-0x0000000004F20000-0x0000000004F60000-memory.dmp

Filesize
256KB

Download
memory/576-86-0x0000000004F20000-0x0000000004F60000-memory.dmp

Filesize
256KB

Download
memory/1544-54-0x0000000000C50000-0x0000000000D54000-memory.dmp

Filesize
1.0MB

Download
memory/1544-60-0x00000000052C0000-0x000000000533E000-memory.dmp

Filesize
504KB

Download
memory/1544-59-0x00000000058C0000-0x00000000059B0000-memory.dmp

Filesize
960KB

Download
memory/1544-58-0x0000000000280000-0x000000000028C000-memory.dmp

Filesize
48KB

Download
memory/1544-57-0x0000000004E50000-0x0000000004E90000-memory.dmp

Filesize
256KB

Download
memory/1544-56-0x0000000000220000-0x0000000000234000-memory.dmp

Filesize
80KB

Download
memory/1544-55-0x0000000004E50000-0x0000000004E90000-memory.dmp

Filesize
256KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads