remcos | 73c4025ffeef1f6c767da566746473c99b0dd93b1a2e1f7d1d5c8b31d29f08f2

General

Target

d53d34f175739008176bb98aa1cfd41c.exe
Size

998KB
MD5

d53d34f175739008176bb98aa1cfd41c
SHA1

2b7244d307b7fe8209bc6874bfb2d11d24886ff8
SHA256

73c4025ffeef1f6c767da566746473c99b0dd93b1a2e1f7d1d5c8b31d29f08f2
SHA512

f6922380d752a656d10065c5b18a1b1c0703ae906ead4b1ac2dc0606eb448b1cbe115b73c79af41848076e7ab03a5dffff5f64a923c346ec799a52110bfff017
SSDEEP

24576:bxeqH+YCtYG6/fXIOC0soC5Qyct5hTxgLeoY93tnvYIEUimX:bxeqH+TenXIOPyc3vgLjY9ZvYI

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:

d53d34f175739008176bb98aa1cfd41c.exeWScript.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\International\Geo\Nation	d53d34f175739008176bb98aa1cfd41c.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 2 IoCs

Processes:

oos.exeoos.exe

pid process

3536 oos.exe
4660 oos.exe

pid	process
3536	oos.exe
4660	oos.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

d53d34f175739008176bb98aa1cfd41c.exeoos.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	d53d34f175739008176bb98aa1cfd41c.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	d53d34f175739008176bb98aa1cfd41c.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	d53d34f175739008176bb98aa1cfd41c.exe
Key created	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Software\Microsoft\Windows\CurrentVersion\Run\	oos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\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-1-5-21-1529757233-3489015626-3409890339-1000\Software\Microsoft\Windows\CurrentVersion\Run\	d53d34f175739008176bb98aa1cfd41c.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

d53d34f175739008176bb98aa1cfd41c.exeoos.exe

description	pid	process	target process
PID 1908 set thread context of 3548	1908	d53d34f175739008176bb98aa1cfd41c.exe	d53d34f175739008176bb98aa1cfd41c.exe
PID 3536 set thread context of 4660	3536	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:

d53d34f175739008176bb98aa1cfd41c.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000_Classes\Local Settings	d53d34f175739008176bb98aa1cfd41c.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

d53d34f175739008176bb98aa1cfd41c.exe

pid process

1908 d53d34f175739008176bb98aa1cfd41c.exe
1908 d53d34f175739008176bb98aa1cfd41c.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

d53d34f175739008176bb98aa1cfd41c.exe

description pid process

Token: SeDebugPrivilege 1908 d53d34f175739008176bb98aa1cfd41c.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

oos.exe

pid process

4660 oos.exe

pid	process
1908	d53d34f175739008176bb98aa1cfd41c.exe
1908	d53d34f175739008176bb98aa1cfd41c.exe

description	pid	process
Token: SeDebugPrivilege	1908	d53d34f175739008176bb98aa1cfd41c.exe

pid	process
4660	oos.exe

Suspicious use of WriteProcessMemory 36 IoCs

Processes:

d53d34f175739008176bb98aa1cfd41c.exed53d34f175739008176bb98aa1cfd41c.exeWScript.execmd.exeoos.exe

description	pid	process	target process
PID 1908 wrote to memory of 4572	1908	d53d34f175739008176bb98aa1cfd41c.exe	d53d34f175739008176bb98aa1cfd41c.exe
PID 1908 wrote to memory of 4572	1908	d53d34f175739008176bb98aa1cfd41c.exe	d53d34f175739008176bb98aa1cfd41c.exe
PID 1908 wrote to memory of 4572	1908	d53d34f175739008176bb98aa1cfd41c.exe	d53d34f175739008176bb98aa1cfd41c.exe
PID 1908 wrote to memory of 3548	1908	d53d34f175739008176bb98aa1cfd41c.exe	d53d34f175739008176bb98aa1cfd41c.exe
PID 1908 wrote to memory of 3548	1908	d53d34f175739008176bb98aa1cfd41c.exe	d53d34f175739008176bb98aa1cfd41c.exe
PID 1908 wrote to memory of 3548	1908	d53d34f175739008176bb98aa1cfd41c.exe	d53d34f175739008176bb98aa1cfd41c.exe
PID 1908 wrote to memory of 3548	1908	d53d34f175739008176bb98aa1cfd41c.exe	d53d34f175739008176bb98aa1cfd41c.exe
PID 1908 wrote to memory of 3548	1908	d53d34f175739008176bb98aa1cfd41c.exe	d53d34f175739008176bb98aa1cfd41c.exe
PID 1908 wrote to memory of 3548	1908	d53d34f175739008176bb98aa1cfd41c.exe	d53d34f175739008176bb98aa1cfd41c.exe
PID 1908 wrote to memory of 3548	1908	d53d34f175739008176bb98aa1cfd41c.exe	d53d34f175739008176bb98aa1cfd41c.exe
PID 1908 wrote to memory of 3548	1908	d53d34f175739008176bb98aa1cfd41c.exe	d53d34f175739008176bb98aa1cfd41c.exe
PID 1908 wrote to memory of 3548	1908	d53d34f175739008176bb98aa1cfd41c.exe	d53d34f175739008176bb98aa1cfd41c.exe
PID 1908 wrote to memory of 3548	1908	d53d34f175739008176bb98aa1cfd41c.exe	d53d34f175739008176bb98aa1cfd41c.exe
PID 1908 wrote to memory of 3548	1908	d53d34f175739008176bb98aa1cfd41c.exe	d53d34f175739008176bb98aa1cfd41c.exe
PID 1908 wrote to memory of 3548	1908	d53d34f175739008176bb98aa1cfd41c.exe	d53d34f175739008176bb98aa1cfd41c.exe
PID 3548 wrote to memory of 2348	3548	d53d34f175739008176bb98aa1cfd41c.exe	WScript.exe
PID 3548 wrote to memory of 2348	3548	d53d34f175739008176bb98aa1cfd41c.exe	WScript.exe
PID 3548 wrote to memory of 2348	3548	d53d34f175739008176bb98aa1cfd41c.exe	WScript.exe
PID 2348 wrote to memory of 3748	2348	WScript.exe	cmd.exe
PID 2348 wrote to memory of 3748	2348	WScript.exe	cmd.exe
PID 2348 wrote to memory of 3748	2348	WScript.exe	cmd.exe
PID 3748 wrote to memory of 3536	3748	cmd.exe	oos.exe
PID 3748 wrote to memory of 3536	3748	cmd.exe	oos.exe
PID 3748 wrote to memory of 3536	3748	cmd.exe	oos.exe
PID 3536 wrote to memory of 4660	3536	oos.exe	oos.exe
PID 3536 wrote to memory of 4660	3536	oos.exe	oos.exe
PID 3536 wrote to memory of 4660	3536	oos.exe	oos.exe
PID 3536 wrote to memory of 4660	3536	oos.exe	oos.exe
PID 3536 wrote to memory of 4660	3536	oos.exe	oos.exe
PID 3536 wrote to memory of 4660	3536	oos.exe	oos.exe
PID 3536 wrote to memory of 4660	3536	oos.exe	oos.exe
PID 3536 wrote to memory of 4660	3536	oos.exe	oos.exe
PID 3536 wrote to memory of 4660	3536	oos.exe	oos.exe
PID 3536 wrote to memory of 4660	3536	oos.exe	oos.exe
PID 3536 wrote to memory of 4660	3536	oos.exe	oos.exe
PID 3536 wrote to memory of 4660	3536	oos.exe	oos.exe

C:\Users\Admin\AppData\Local\Temp\d53d34f175739008176bb98aa1cfd41c.exe
"C:\Users\Admin\AppData\Local\Temp\d53d34f175739008176bb98aa1cfd41c.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1908

C:\Users\Admin\AppData\Local\Temp\d53d34f175739008176bb98aa1cfd41c.exe
"C:\Users\Admin\AppData\Local\Temp\d53d34f175739008176bb98aa1cfd41c.exe"
2⤵
PID:4572

C:\Users\Admin\AppData\Local\Temp\d53d34f175739008176bb98aa1cfd41c.exe
"C:\Users\Admin\AppData\Local\Temp\d53d34f175739008176bb98aa1cfd41c.exe"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:3548

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:2348

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\oos.exe"
4⤵
- Suspicious use of WriteProcessMemory
PID:3748

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:3536

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:4660

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
6d2e2be3689db4768869d98b9854c261

SHA1
7b4794753b9359ce97081f5f36dee97b7a8e8ec6

SHA256
a7e42f1cbec16597031027143eb7fb4d7537f008e6759a3cbd22c313984eda78

SHA512
0db3c19f58834b5af536e0ec5a175a9f9b54d28a64b3115049f1fecb47d12063e8dcc1b20b4142eccebb98e70ff7102fa3ed0af6c5b93633c498c421809dfa36

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
998KB

MD5
d53d34f175739008176bb98aa1cfd41c

SHA1
2b7244d307b7fe8209bc6874bfb2d11d24886ff8

SHA256
73c4025ffeef1f6c767da566746473c99b0dd93b1a2e1f7d1d5c8b31d29f08f2

SHA512
f6922380d752a656d10065c5b18a1b1c0703ae906ead4b1ac2dc0606eb448b1cbe115b73c79af41848076e7ab03a5dffff5f64a923c346ec799a52110bfff017

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
998KB

MD5
d53d34f175739008176bb98aa1cfd41c

SHA1
2b7244d307b7fe8209bc6874bfb2d11d24886ff8

SHA256
73c4025ffeef1f6c767da566746473c99b0dd93b1a2e1f7d1d5c8b31d29f08f2

SHA512
f6922380d752a656d10065c5b18a1b1c0703ae906ead4b1ac2dc0606eb448b1cbe115b73c79af41848076e7ab03a5dffff5f64a923c346ec799a52110bfff017

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
998KB

MD5
d53d34f175739008176bb98aa1cfd41c

SHA1
2b7244d307b7fe8209bc6874bfb2d11d24886ff8

SHA256
73c4025ffeef1f6c767da566746473c99b0dd93b1a2e1f7d1d5c8b31d29f08f2

SHA512
f6922380d752a656d10065c5b18a1b1c0703ae906ead4b1ac2dc0606eb448b1cbe115b73c79af41848076e7ab03a5dffff5f64a923c346ec799a52110bfff017

Download Submit
memory/1908-136-0x00000000057B0000-0x00000000057BA000-memory.dmp

Filesize
40KB

Download
memory/1908-139-0x0000000009B20000-0x0000000009BBC000-memory.dmp

Filesize
624KB

Download
memory/1908-133-0x0000000000CE0000-0x0000000000DE0000-memory.dmp

Filesize
1024KB

Download
memory/1908-138-0x00000000057A0000-0x00000000057B0000-memory.dmp

Filesize
64KB

Download
memory/1908-137-0x00000000057A0000-0x00000000057B0000-memory.dmp

Filesize
64KB

Download
memory/1908-135-0x00000000057D0000-0x0000000005862000-memory.dmp

Filesize
584KB

Download
memory/1908-134-0x0000000005CE0000-0x0000000006284000-memory.dmp

Filesize
5.6MB

Download
memory/3536-155-0x0000000005560000-0x0000000005570000-memory.dmp

Filesize
64KB

Download
memory/3536-154-0x0000000005560000-0x0000000005570000-memory.dmp

Filesize
64KB

Download
memory/3548-140-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3548-149-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3548-143-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3548-142-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4660-164-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4660-161-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4660-163-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4660-160-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4660-165-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4660-166-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4660-169-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4660-172-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4660-173-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4660-158-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4660-178-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4660-179-0x0000000000400000-0x000000000047E000-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