remcos | 51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8

General

Target

51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe
Size

1.2MB
MD5

24f46e6a07749b312571d0ea20f8b343
SHA1

b234bb98d390b044af8be8a40aef651bd273a304
SHA256

51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8
SHA512

e152b7f5049690cf357fb9aba9210d8f0dcffcc354ad18efe871f0af428cf3cbaee1e1e1c1eedfc60b9a4802bad2d63ed73ca1c7883cb365a4836aa73e0f303e
SSDEEP

24576:kTutACnAy0mX6+JANYMVCYDJlsbuSsXzTRjJQJ8pBcO:wutUJGANYMVCYDJlsrEvhJpI

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 3 IoCs

Processes:

oos.exeoos.exeoos.exe

pid process

1508 oos.exe
604 oos.exe
1968 oos.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

620 cmd.exe

pid	process
1508	oos.exe
604	oos.exe
1968	oos.exe

pid	process
620	cmd.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exeoos.exe

description	pid	process	target process
PID 360 set thread context of 300	360	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe
PID 1508 set thread context of 1968	1508	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 2 IoCs

Processes:

oos.exe

pid process

1508 oos.exe
1508 oos.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

oos.exe

description pid process

Token: SeDebugPrivilege 1508 oos.exe

pid	process
1508	oos.exe
1508	oos.exe

description	pid	process
Token: SeDebugPrivilege	1508	oos.exe

Suspicious use of WriteProcessMemory 42 IoCs

Processes:

51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exeWScript.execmd.exeoos.exe

description	pid	process	target process
PID 360 wrote to memory of 300	360	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe
PID 360 wrote to memory of 300	360	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe
PID 360 wrote to memory of 300	360	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe
PID 360 wrote to memory of 300	360	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe
PID 360 wrote to memory of 300	360	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe
PID 360 wrote to memory of 300	360	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe
PID 360 wrote to memory of 300	360	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe
PID 360 wrote to memory of 300	360	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe
PID 360 wrote to memory of 300	360	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe
PID 360 wrote to memory of 300	360	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe
PID 360 wrote to memory of 300	360	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe
PID 360 wrote to memory of 300	360	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe
PID 360 wrote to memory of 300	360	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe
PID 300 wrote to memory of 1920	300	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe	WScript.exe
PID 300 wrote to memory of 1920	300	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe	WScript.exe
PID 300 wrote to memory of 1920	300	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe	WScript.exe
PID 300 wrote to memory of 1920	300	51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe	WScript.exe
PID 1920 wrote to memory of 620	1920	WScript.exe	cmd.exe
PID 1920 wrote to memory of 620	1920	WScript.exe	cmd.exe
PID 1920 wrote to memory of 620	1920	WScript.exe	cmd.exe
PID 1920 wrote to memory of 620	1920	WScript.exe	cmd.exe
PID 620 wrote to memory of 1508	620	cmd.exe	oos.exe
PID 620 wrote to memory of 1508	620	cmd.exe	oos.exe
PID 620 wrote to memory of 1508	620	cmd.exe	oos.exe
PID 620 wrote to memory of 1508	620	cmd.exe	oos.exe
PID 1508 wrote to memory of 604	1508	oos.exe	oos.exe
PID 1508 wrote to memory of 604	1508	oos.exe	oos.exe
PID 1508 wrote to memory of 604	1508	oos.exe	oos.exe
PID 1508 wrote to memory of 604	1508	oos.exe	oos.exe
PID 1508 wrote to memory of 1968	1508	oos.exe	oos.exe
PID 1508 wrote to memory of 1968	1508	oos.exe	oos.exe
PID 1508 wrote to memory of 1968	1508	oos.exe	oos.exe
PID 1508 wrote to memory of 1968	1508	oos.exe	oos.exe
PID 1508 wrote to memory of 1968	1508	oos.exe	oos.exe
PID 1508 wrote to memory of 1968	1508	oos.exe	oos.exe
PID 1508 wrote to memory of 1968	1508	oos.exe	oos.exe
PID 1508 wrote to memory of 1968	1508	oos.exe	oos.exe
PID 1508 wrote to memory of 1968	1508	oos.exe	oos.exe
PID 1508 wrote to memory of 1968	1508	oos.exe	oos.exe
PID 1508 wrote to memory of 1968	1508	oos.exe	oos.exe
PID 1508 wrote to memory of 1968	1508	oos.exe	oos.exe
PID 1508 wrote to memory of 1968	1508	oos.exe	oos.exe

C:\Users\Admin\AppData\Local\Temp\51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe
"C:\Users\Admin\AppData\Local\Temp\51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:360

C:\Users\Admin\AppData\Local\Temp\51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8.exe
"{path}"
2⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:300

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
3⤵
- Suspicious use of WriteProcessMemory
PID:1920

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:620

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:1508

C:\Users\Admin\AppData\Roaming\oos.exe
"{path}"
6⤵
- Executes dropped EXE
PID:604

C:\Users\Admin\AppData\Roaming\oos.exe
"{path}"
6⤵
- Executes dropped EXE
PID:1968

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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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
1.2MB

MD5
24f46e6a07749b312571d0ea20f8b343

SHA1
b234bb98d390b044af8be8a40aef651bd273a304

SHA256
51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8

SHA512
e152b7f5049690cf357fb9aba9210d8f0dcffcc354ad18efe871f0af428cf3cbaee1e1e1c1eedfc60b9a4802bad2d63ed73ca1c7883cb365a4836aa73e0f303e

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

MD5
24f46e6a07749b312571d0ea20f8b343

SHA1
b234bb98d390b044af8be8a40aef651bd273a304

SHA256
51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8

SHA512
e152b7f5049690cf357fb9aba9210d8f0dcffcc354ad18efe871f0af428cf3cbaee1e1e1c1eedfc60b9a4802bad2d63ed73ca1c7883cb365a4836aa73e0f303e

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

MD5
24f46e6a07749b312571d0ea20f8b343

SHA1
b234bb98d390b044af8be8a40aef651bd273a304

SHA256
51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8

SHA512
e152b7f5049690cf357fb9aba9210d8f0dcffcc354ad18efe871f0af428cf3cbaee1e1e1c1eedfc60b9a4802bad2d63ed73ca1c7883cb365a4836aa73e0f303e

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

MD5
24f46e6a07749b312571d0ea20f8b343

SHA1
b234bb98d390b044af8be8a40aef651bd273a304

SHA256
51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8

SHA512
e152b7f5049690cf357fb9aba9210d8f0dcffcc354ad18efe871f0af428cf3cbaee1e1e1c1eedfc60b9a4802bad2d63ed73ca1c7883cb365a4836aa73e0f303e

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

MD5
24f46e6a07749b312571d0ea20f8b343

SHA1
b234bb98d390b044af8be8a40aef651bd273a304

SHA256
51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8

SHA512
e152b7f5049690cf357fb9aba9210d8f0dcffcc354ad18efe871f0af428cf3cbaee1e1e1c1eedfc60b9a4802bad2d63ed73ca1c7883cb365a4836aa73e0f303e

Download Submit
memory/300-62-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/300-60-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/300-64-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/300-65-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/300-66-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/300-67-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/300-69-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/300-71-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/300-72-0x000000000043168C-mapping.dmp

Download
memory/300-75-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/300-76-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/300-59-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/300-78-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/360-58-0x0000000005C50000-0x0000000005CCA000-memory.dmp

Filesize
488KB

Download
memory/360-54-0x0000000000220000-0x000000000034C000-memory.dmp

Filesize
1.2MB

Download
memory/360-57-0x0000000007DD0000-0x0000000007E8C000-memory.dmp

Filesize
752KB

Download
memory/360-56-0x00000000003D0000-0x00000000003E2000-memory.dmp

Filesize
72KB

Download
memory/360-55-0x00000000767D1000-0x00000000767D3000-memory.dmp

Filesize
8KB

Download
memory/620-81-0x0000000000000000-mapping.dmp

Download
memory/1508-84-0x0000000000000000-mapping.dmp

Download
memory/1508-86-0x0000000000B00000-0x0000000000C2C000-memory.dmp

Filesize
1.2MB

Download
memory/1920-77-0x0000000000000000-mapping.dmp

Download
memory/1968-102-0x000000000043168C-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads