remcos | 6361315cefbde08b7a1dc646cbc9ee09c3f57de65a1f7e05d3d1b7b986b2e7fb

Analysis

max time kernel
149s
max time network
151s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
21-03-2023 18:59

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General

Target

tmp.exe
Size

1.2MB
MD5

d789b2e872b82af29170b174c3b9e97f
SHA1

4e3dff1e7dbff7a96012667d00fca66d0fe7fb15
SHA256

6361315cefbde08b7a1dc646cbc9ee09c3f57de65a1f7e05d3d1b7b986b2e7fb
SHA512

462b0dca74c3a4707d76866aaaea4755e4644b27f22870f04f90b62943a216b775f4a7524c9b05a5fad5ca293c83e61f3c8bd0c0e310395ae5d1e02cd83ee302
SSDEEP

24576:ERF0YvDgAgMI0csDuyNsdsTDD27bIclWWJ+rk9EWy4/kgwJ/Y4DmFusePSgzPkns:ERFl0Ag70csDumPnK7bIcgWQQ9Ly4pi

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 4 IoCs

Processes:

oos.exeoos.exeoos.exeoos.exe

pid process

1124 oos.exe
1656 oos.exe
1316 oos.exe
2012 oos.exe
Loads dropped DLL 2 IoCs

Processes:

cmd.exe

pid process

1544 cmd.exe
1544 cmd.exe

pid	process
1124	oos.exe
1656	oos.exe
1316	oos.exe
2012	oos.exe

pid	process
1544	cmd.exe
1544	cmd.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

oos.exetmp.exe

description	ioc	process
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-1-5-21-2647223082-2067913677-935928954-1000\Software\Microsoft\Windows\CurrentVersion\Run\	tmp.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\""	tmp.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\	tmp.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	tmp.exe
Key created	\REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000\Software\Microsoft\Windows\CurrentVersion\Run\	oos.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\""	oos.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

tmp.exeoos.exe

description pid process target process

PID 1676 set thread context of 1312 1676 tmp.exe tmp.exe
PID 1124 set thread context of 2012 1124 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
Suspicious behavior: EnumeratesProcesses 7 IoCs

Processes:

tmp.exeoos.exe

pid process

1676 tmp.exe
1676 tmp.exe
1676 tmp.exe
1124 oos.exe
1124 oos.exe
1124 oos.exe
1124 oos.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

tmp.exeoos.exe

description pid process

Token: SeDebugPrivilege 1676 tmp.exe
Token: SeDebugPrivilege 1124 oos.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

oos.exe

pid process

2012 oos.exe

description	pid	process	target process
PID 1676 set thread context of 1312	1676	tmp.exe	tmp.exe
PID 1124 set thread context of 2012	1124	oos.exe	oos.exe

pid	process
1676	tmp.exe
1676	tmp.exe
1676	tmp.exe
1124	oos.exe
1124	oos.exe
1124	oos.exe
1124	oos.exe

description	pid	process
Token: SeDebugPrivilege	1676	tmp.exe
Token: SeDebugPrivilege	1124	oos.exe

pid	process
2012	oos.exe

Suspicious use of WriteProcessMemory 50 IoCs

Processes:

tmp.exetmp.exeWScript.execmd.exeoos.exe

description	pid	process	target process
PID 1676 wrote to memory of 568	1676	tmp.exe	tmp.exe
PID 1676 wrote to memory of 568	1676	tmp.exe	tmp.exe
PID 1676 wrote to memory of 568	1676	tmp.exe	tmp.exe
PID 1676 wrote to memory of 568	1676	tmp.exe	tmp.exe
PID 1676 wrote to memory of 1312	1676	tmp.exe	tmp.exe
PID 1676 wrote to memory of 1312	1676	tmp.exe	tmp.exe
PID 1676 wrote to memory of 1312	1676	tmp.exe	tmp.exe
PID 1676 wrote to memory of 1312	1676	tmp.exe	tmp.exe
PID 1676 wrote to memory of 1312	1676	tmp.exe	tmp.exe
PID 1676 wrote to memory of 1312	1676	tmp.exe	tmp.exe
PID 1676 wrote to memory of 1312	1676	tmp.exe	tmp.exe
PID 1676 wrote to memory of 1312	1676	tmp.exe	tmp.exe
PID 1676 wrote to memory of 1312	1676	tmp.exe	tmp.exe
PID 1676 wrote to memory of 1312	1676	tmp.exe	tmp.exe
PID 1676 wrote to memory of 1312	1676	tmp.exe	tmp.exe
PID 1676 wrote to memory of 1312	1676	tmp.exe	tmp.exe
PID 1676 wrote to memory of 1312	1676	tmp.exe	tmp.exe
PID 1312 wrote to memory of 704	1312	tmp.exe	WScript.exe
PID 1312 wrote to memory of 704	1312	tmp.exe	WScript.exe
PID 1312 wrote to memory of 704	1312	tmp.exe	WScript.exe
PID 1312 wrote to memory of 704	1312	tmp.exe	WScript.exe
PID 704 wrote to memory of 1544	704	WScript.exe	cmd.exe
PID 704 wrote to memory of 1544	704	WScript.exe	cmd.exe
PID 704 wrote to memory of 1544	704	WScript.exe	cmd.exe
PID 704 wrote to memory of 1544	704	WScript.exe	cmd.exe
PID 1544 wrote to memory of 1124	1544	cmd.exe	oos.exe
PID 1544 wrote to memory of 1124	1544	cmd.exe	oos.exe
PID 1544 wrote to memory of 1124	1544	cmd.exe	oos.exe
PID 1544 wrote to memory of 1124	1544	cmd.exe	oos.exe
PID 1124 wrote to memory of 1656	1124	oos.exe	oos.exe
PID 1124 wrote to memory of 1656	1124	oos.exe	oos.exe
PID 1124 wrote to memory of 1656	1124	oos.exe	oos.exe
PID 1124 wrote to memory of 1656	1124	oos.exe	oos.exe
PID 1124 wrote to memory of 1316	1124	oos.exe	oos.exe
PID 1124 wrote to memory of 1316	1124	oos.exe	oos.exe
PID 1124 wrote to memory of 1316	1124	oos.exe	oos.exe
PID 1124 wrote to memory of 1316	1124	oos.exe	oos.exe
PID 1124 wrote to memory of 2012	1124	oos.exe	oos.exe
PID 1124 wrote to memory of 2012	1124	oos.exe	oos.exe
PID 1124 wrote to memory of 2012	1124	oos.exe	oos.exe
PID 1124 wrote to memory of 2012	1124	oos.exe	oos.exe
PID 1124 wrote to memory of 2012	1124	oos.exe	oos.exe
PID 1124 wrote to memory of 2012	1124	oos.exe	oos.exe
PID 1124 wrote to memory of 2012	1124	oos.exe	oos.exe
PID 1124 wrote to memory of 2012	1124	oos.exe	oos.exe
PID 1124 wrote to memory of 2012	1124	oos.exe	oos.exe
PID 1124 wrote to memory of 2012	1124	oos.exe	oos.exe
PID 1124 wrote to memory of 2012	1124	oos.exe	oos.exe
PID 1124 wrote to memory of 2012	1124	oos.exe	oos.exe
PID 1124 wrote to memory of 2012	1124	oos.exe	oos.exe

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1676

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
2⤵
PID:568

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
2⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1312

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
3⤵
- Suspicious use of WriteProcessMemory
PID:704

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:1544

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:1124

C:\Users\Admin\AppData\Roaming\oos.exe
"C:\Users\Admin\AppData\Roaming\oos.exe"
6⤵
- Executes dropped EXE
PID:1656

C:\Users\Admin\AppData\Roaming\oos.exe
"C:\Users\Admin\AppData\Roaming\oos.exe"
6⤵
- Executes dropped EXE
PID:1316

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:2012

Network

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

MD5
3ffd8515368dba11be7db10e58ab5fc2

SHA1
3a425c3f5a8d2f8626bbc2c0a910b8a4d12d099e

SHA256
80b08fe466f2b56b99bf25ad160f3009aaaaad2d42bf5cdba327d424bd15c28d

SHA512
5d6eff03b5ea569a6b65c17654841d85489e89a45baf7e2ae80eeac370174a5bb6f70391cd94e88f959eb81746853b25b1d04bdd6c7a7d434a841eba2760950e

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
1.2MB

MD5
d789b2e872b82af29170b174c3b9e97f

SHA1
4e3dff1e7dbff7a96012667d00fca66d0fe7fb15

SHA256
6361315cefbde08b7a1dc646cbc9ee09c3f57de65a1f7e05d3d1b7b986b2e7fb

SHA512
462b0dca74c3a4707d76866aaaea4755e4644b27f22870f04f90b62943a216b775f4a7524c9b05a5fad5ca293c83e61f3c8bd0c0e310395ae5d1e02cd83ee302

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
1.2MB

MD5
d789b2e872b82af29170b174c3b9e97f

SHA1
4e3dff1e7dbff7a96012667d00fca66d0fe7fb15

SHA256
6361315cefbde08b7a1dc646cbc9ee09c3f57de65a1f7e05d3d1b7b986b2e7fb

SHA512
462b0dca74c3a4707d76866aaaea4755e4644b27f22870f04f90b62943a216b775f4a7524c9b05a5fad5ca293c83e61f3c8bd0c0e310395ae5d1e02cd83ee302

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
1.2MB

MD5
d789b2e872b82af29170b174c3b9e97f

SHA1
4e3dff1e7dbff7a96012667d00fca66d0fe7fb15

SHA256
6361315cefbde08b7a1dc646cbc9ee09c3f57de65a1f7e05d3d1b7b986b2e7fb

SHA512
462b0dca74c3a4707d76866aaaea4755e4644b27f22870f04f90b62943a216b775f4a7524c9b05a5fad5ca293c83e61f3c8bd0c0e310395ae5d1e02cd83ee302

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
1.2MB

MD5
d789b2e872b82af29170b174c3b9e97f

SHA1
4e3dff1e7dbff7a96012667d00fca66d0fe7fb15

SHA256
6361315cefbde08b7a1dc646cbc9ee09c3f57de65a1f7e05d3d1b7b986b2e7fb

SHA512
462b0dca74c3a4707d76866aaaea4755e4644b27f22870f04f90b62943a216b775f4a7524c9b05a5fad5ca293c83e61f3c8bd0c0e310395ae5d1e02cd83ee302

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
1.2MB

MD5
d789b2e872b82af29170b174c3b9e97f

SHA1
4e3dff1e7dbff7a96012667d00fca66d0fe7fb15

SHA256
6361315cefbde08b7a1dc646cbc9ee09c3f57de65a1f7e05d3d1b7b986b2e7fb

SHA512
462b0dca74c3a4707d76866aaaea4755e4644b27f22870f04f90b62943a216b775f4a7524c9b05a5fad5ca293c83e61f3c8bd0c0e310395ae5d1e02cd83ee302

Download Submit
\Users\Admin\AppData\Roaming\oos.exe
Filesize
1.2MB

MD5
d789b2e872b82af29170b174c3b9e97f

SHA1
4e3dff1e7dbff7a96012667d00fca66d0fe7fb15

SHA256
6361315cefbde08b7a1dc646cbc9ee09c3f57de65a1f7e05d3d1b7b986b2e7fb

SHA512
462b0dca74c3a4707d76866aaaea4755e4644b27f22870f04f90b62943a216b775f4a7524c9b05a5fad5ca293c83e61f3c8bd0c0e310395ae5d1e02cd83ee302

Download Submit
\Users\Admin\AppData\Roaming\oos.exe
Filesize
1.2MB

MD5
d789b2e872b82af29170b174c3b9e97f

SHA1
4e3dff1e7dbff7a96012667d00fca66d0fe7fb15

SHA256
6361315cefbde08b7a1dc646cbc9ee09c3f57de65a1f7e05d3d1b7b986b2e7fb

SHA512
462b0dca74c3a4707d76866aaaea4755e4644b27f22870f04f90b62943a216b775f4a7524c9b05a5fad5ca293c83e61f3c8bd0c0e310395ae5d1e02cd83ee302

Download Submit
memory/1124-86-0x0000000004A30000-0x0000000004A70000-memory.dmp

Filesize
256KB

Download
memory/1124-85-0x0000000004A30000-0x0000000004A70000-memory.dmp

Filesize
256KB

Download
memory/1124-84-0x0000000000270000-0x00000000003B4000-memory.dmp

Filesize
1.3MB

Download
memory/1312-61-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1312-65-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1312-69-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1312-68-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1312-71-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1312-75-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1312-78-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1312-66-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1312-64-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1312-67-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1312-63-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1312-62-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1312-60-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1676-54-0x0000000000F30000-0x0000000001074000-memory.dmp

Filesize
1.3MB

Download
memory/1676-59-0x00000000061A0000-0x000000000621E000-memory.dmp

Filesize
504KB

Download
memory/1676-58-0x00000000083D0000-0x00000000084C2000-memory.dmp

Filesize
968KB

Download
memory/1676-57-0x0000000000EA0000-0x0000000000EE0000-memory.dmp

Filesize
256KB

Download
memory/1676-56-0x0000000000270000-0x0000000000282000-memory.dmp

Filesize
72KB

Download
memory/1676-55-0x0000000000EA0000-0x0000000000EE0000-memory.dmp

Filesize
256KB

Download
memory/2012-105-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-125-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-104-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-101-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-106-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-107-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-108-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-109-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-111-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-112-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-113-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-115-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-116-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-117-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-119-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-120-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-121-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-123-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-124-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-102-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-126-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-97-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2012-128-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-129-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-130-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-132-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-133-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-134-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-136-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-137-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-138-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-139-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-141-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-142-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-143-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-145-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-146-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2012-147-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

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memory/2012-148-0x0000000000400000-0x000000000047E000-memory.dmp

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504KB

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