remcos | 8b5f51bac1e86642f29d33ce68e4ca56edecb6c76c39d936309e6b4c1d1e8554

General

Target

SecuriteInfo.com.Win32.PWSX-gen.13177.exe
Size

917KB
MD5

066e3ef754707df1015ea3ecdfda156f
SHA1

d47daee600d27a8dc2a3845bc2bfde635cd19216
SHA256

8b5f51bac1e86642f29d33ce68e4ca56edecb6c76c39d936309e6b4c1d1e8554
SHA512

85c4f76d9c9108c3411b2165bab3838193695271b2ad464ccc9f7af44f545a30b185f47914ec68697bd908908db10aa3494f0a8ed804eaee9aec02b05983fc7d
SSDEEP

24576:82cvclO8tWdRHD0j7KCZR5aQMoARfvJqo:87clAHD0j7KCZ/51+h

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

2900 oos.exe
532 oos.exe

pid	process
2900	oos.exe
532	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.Win32.PWSX-gen.13177.exeWScript.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	SecuriteInfo.com.Win32.PWSX-gen.13177.exe
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\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.Win32.PWSX-gen.13177.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-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows\CurrentVersion\Run\	SecuriteInfo.com.Win32.PWSX-gen.13177.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	SecuriteInfo.com.Win32.PWSX-gen.13177.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	SecuriteInfo.com.Win32.PWSX-gen.13177.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	SecuriteInfo.com.Win32.PWSX-gen.13177.exe
Key created	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows\CurrentVersion\Run\	oos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	oos.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

SecuriteInfo.com.Win32.PWSX-gen.13177.exeoos.exe

description	pid	process	target process
PID 1156 set thread context of 1420	1156	SecuriteInfo.com.Win32.PWSX-gen.13177.exe	SecuriteInfo.com.Win32.PWSX-gen.13177.exe
PID 2900 set thread context of 532	2900	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.Win32.PWSX-gen.13177.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000_Classes\Local Settings	SecuriteInfo.com.Win32.PWSX-gen.13177.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

SecuriteInfo.com.Win32.PWSX-gen.13177.exe

pid	process
1156	SecuriteInfo.com.Win32.PWSX-gen.13177.exe
1156	SecuriteInfo.com.Win32.PWSX-gen.13177.exe
1156	SecuriteInfo.com.Win32.PWSX-gen.13177.exe
1156	SecuriteInfo.com.Win32.PWSX-gen.13177.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

SecuriteInfo.com.Win32.PWSX-gen.13177.exe

description pid process

Token: SeDebugPrivilege 1156 SecuriteInfo.com.Win32.PWSX-gen.13177.exe
Suspicious use of SetWindowsHookEx 5 IoCs

Processes:

SecuriteInfo.com.Win32.PWSX-gen.13177.exeoos.exeoos.exe

pid process

1156 SecuriteInfo.com.Win32.PWSX-gen.13177.exe
1156 SecuriteInfo.com.Win32.PWSX-gen.13177.exe
2900 oos.exe
2900 oos.exe
532 oos.exe

description	pid	process
Token: SeDebugPrivilege	1156	SecuriteInfo.com.Win32.PWSX-gen.13177.exe

Suspicious use of WriteProcessMemory 39 IoCs

Processes:

SecuriteInfo.com.Win32.PWSX-gen.13177.exeSecuriteInfo.com.Win32.PWSX-gen.13177.exeWScript.execmd.exeoos.exe

description	pid	process	target process
PID 1156 wrote to memory of 1772	1156	SecuriteInfo.com.Win32.PWSX-gen.13177.exe	SecuriteInfo.com.Win32.PWSX-gen.13177.exe
PID 1156 wrote to memory of 1772	1156	SecuriteInfo.com.Win32.PWSX-gen.13177.exe	SecuriteInfo.com.Win32.PWSX-gen.13177.exe
PID 1156 wrote to memory of 1772	1156	SecuriteInfo.com.Win32.PWSX-gen.13177.exe	SecuriteInfo.com.Win32.PWSX-gen.13177.exe
PID 1156 wrote to memory of 1456	1156	SecuriteInfo.com.Win32.PWSX-gen.13177.exe	SecuriteInfo.com.Win32.PWSX-gen.13177.exe
PID 1156 wrote to memory of 1456	1156	SecuriteInfo.com.Win32.PWSX-gen.13177.exe	SecuriteInfo.com.Win32.PWSX-gen.13177.exe
PID 1156 wrote to memory of 1456	1156	SecuriteInfo.com.Win32.PWSX-gen.13177.exe	SecuriteInfo.com.Win32.PWSX-gen.13177.exe
PID 1156 wrote to memory of 1420	1156	SecuriteInfo.com.Win32.PWSX-gen.13177.exe	SecuriteInfo.com.Win32.PWSX-gen.13177.exe
PID 1156 wrote to memory of 1420	1156	SecuriteInfo.com.Win32.PWSX-gen.13177.exe	SecuriteInfo.com.Win32.PWSX-gen.13177.exe
PID 1156 wrote to memory of 1420	1156	SecuriteInfo.com.Win32.PWSX-gen.13177.exe	SecuriteInfo.com.Win32.PWSX-gen.13177.exe
PID 1156 wrote to memory of 1420	1156	SecuriteInfo.com.Win32.PWSX-gen.13177.exe	SecuriteInfo.com.Win32.PWSX-gen.13177.exe
PID 1156 wrote to memory of 1420	1156	SecuriteInfo.com.Win32.PWSX-gen.13177.exe	SecuriteInfo.com.Win32.PWSX-gen.13177.exe
PID 1156 wrote to memory of 1420	1156	SecuriteInfo.com.Win32.PWSX-gen.13177.exe	SecuriteInfo.com.Win32.PWSX-gen.13177.exe
PID 1156 wrote to memory of 1420	1156	SecuriteInfo.com.Win32.PWSX-gen.13177.exe	SecuriteInfo.com.Win32.PWSX-gen.13177.exe
PID 1156 wrote to memory of 1420	1156	SecuriteInfo.com.Win32.PWSX-gen.13177.exe	SecuriteInfo.com.Win32.PWSX-gen.13177.exe
PID 1156 wrote to memory of 1420	1156	SecuriteInfo.com.Win32.PWSX-gen.13177.exe	SecuriteInfo.com.Win32.PWSX-gen.13177.exe
PID 1156 wrote to memory of 1420	1156	SecuriteInfo.com.Win32.PWSX-gen.13177.exe	SecuriteInfo.com.Win32.PWSX-gen.13177.exe
PID 1156 wrote to memory of 1420	1156	SecuriteInfo.com.Win32.PWSX-gen.13177.exe	SecuriteInfo.com.Win32.PWSX-gen.13177.exe
PID 1156 wrote to memory of 1420	1156	SecuriteInfo.com.Win32.PWSX-gen.13177.exe	SecuriteInfo.com.Win32.PWSX-gen.13177.exe
PID 1420 wrote to memory of 1028	1420	SecuriteInfo.com.Win32.PWSX-gen.13177.exe	WScript.exe
PID 1420 wrote to memory of 1028	1420	SecuriteInfo.com.Win32.PWSX-gen.13177.exe	WScript.exe
PID 1420 wrote to memory of 1028	1420	SecuriteInfo.com.Win32.PWSX-gen.13177.exe	WScript.exe
PID 1028 wrote to memory of 4164	1028	WScript.exe	cmd.exe
PID 1028 wrote to memory of 4164	1028	WScript.exe	cmd.exe
PID 1028 wrote to memory of 4164	1028	WScript.exe	cmd.exe
PID 4164 wrote to memory of 2900	4164	cmd.exe	oos.exe
PID 4164 wrote to memory of 2900	4164	cmd.exe	oos.exe
PID 4164 wrote to memory of 2900	4164	cmd.exe	oos.exe
PID 2900 wrote to memory of 532	2900	oos.exe	oos.exe
PID 2900 wrote to memory of 532	2900	oos.exe	oos.exe
PID 2900 wrote to memory of 532	2900	oos.exe	oos.exe
PID 2900 wrote to memory of 532	2900	oos.exe	oos.exe
PID 2900 wrote to memory of 532	2900	oos.exe	oos.exe
PID 2900 wrote to memory of 532	2900	oos.exe	oos.exe
PID 2900 wrote to memory of 532	2900	oos.exe	oos.exe
PID 2900 wrote to memory of 532	2900	oos.exe	oos.exe
PID 2900 wrote to memory of 532	2900	oos.exe	oos.exe
PID 2900 wrote to memory of 532	2900	oos.exe	oos.exe
PID 2900 wrote to memory of 532	2900	oos.exe	oos.exe
PID 2900 wrote to memory of 532	2900	oos.exe	oos.exe

C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.PWSX-gen.13177.exe
"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.PWSX-gen.13177.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1156

C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.PWSX-gen.13177.exe
"{path}"
2⤵
PID:1772

C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.PWSX-gen.13177.exe
"{path}"
2⤵
PID:1456

C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.PWSX-gen.13177.exe
"{path}"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1420

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:1028

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\oos.exe"
4⤵
- Suspicious use of WriteProcessMemory
PID:4164

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 SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2900

C:\Users\Admin\AppData\Roaming\oos.exe
"{path}"
6⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetWindowsHookEx
PID:532

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

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
917KB

MD5
066e3ef754707df1015ea3ecdfda156f

SHA1
d47daee600d27a8dc2a3845bc2bfde635cd19216

SHA256
8b5f51bac1e86642f29d33ce68e4ca56edecb6c76c39d936309e6b4c1d1e8554

SHA512
85c4f76d9c9108c3411b2165bab3838193695271b2ad464ccc9f7af44f545a30b185f47914ec68697bd908908db10aa3494f0a8ed804eaee9aec02b05983fc7d

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
917KB

MD5
066e3ef754707df1015ea3ecdfda156f

SHA1
d47daee600d27a8dc2a3845bc2bfde635cd19216

SHA256
8b5f51bac1e86642f29d33ce68e4ca56edecb6c76c39d936309e6b4c1d1e8554

SHA512
85c4f76d9c9108c3411b2165bab3838193695271b2ad464ccc9f7af44f545a30b185f47914ec68697bd908908db10aa3494f0a8ed804eaee9aec02b05983fc7d

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
917KB

MD5
066e3ef754707df1015ea3ecdfda156f

SHA1
d47daee600d27a8dc2a3845bc2bfde635cd19216

SHA256
8b5f51bac1e86642f29d33ce68e4ca56edecb6c76c39d936309e6b4c1d1e8554

SHA512
85c4f76d9c9108c3411b2165bab3838193695271b2ad464ccc9f7af44f545a30b185f47914ec68697bd908908db10aa3494f0a8ed804eaee9aec02b05983fc7d

Download Submit
memory/532-157-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/532-156-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/532-155-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/532-154-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/532-151-0x0000000000000000-mapping.dmp

Download
memory/1028-144-0x0000000000000000-mapping.dmp

Download
memory/1156-136-0x00000000052F0000-0x00000000052FA000-memory.dmp

Filesize
40KB

Download
memory/1156-132-0x0000000000860000-0x000000000094C000-memory.dmp

Filesize
944KB

Download
memory/1156-133-0x00000000058D0000-0x0000000005E74000-memory.dmp

Filesize
5.6MB

Download
memory/1156-134-0x0000000005320000-0x00000000053B2000-memory.dmp

Filesize
584KB

Download
memory/1156-135-0x0000000005460000-0x00000000054FC000-memory.dmp

Filesize
624KB

Download
memory/1420-143-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1420-145-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1420-141-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1420-140-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1420-139-0x0000000000000000-mapping.dmp

Download
memory/1420-142-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1456-138-0x0000000000000000-mapping.dmp

Download
memory/1772-137-0x0000000000000000-mapping.dmp

Download
memory/2900-148-0x0000000000000000-mapping.dmp

Download
memory/4164-147-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads