remcos | 6a9beed2218eb04e929a87b8e1e1fb1f5d3197136c96b434e82f9dd62e71233c

General

Target

Quotation.exe
Size

163KB
MD5

5d3efb4803c5ec263edc87d268c6035b
SHA1

d16a17af079d759e90f6fbb955455e00dd5d6df6
SHA256

6a9beed2218eb04e929a87b8e1e1fb1f5d3197136c96b434e82f9dd62e71233c
SHA512

1ed1da2650690e98aa10c498f8bba6562169a54bcb28a7cad53818c1f077de777de7d4888a4da8ef7a4c5a0b31d11b52357f01749ec51f391f46e17fc2045913

Score

10^/10

remcos persistence rat

Malware Config

Extracted

Family

remcos

C2

whatgodcannotdodoestnotexist.duckdns.org:2889

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Executes dropped EXE 2 IoCs

Processes:

remcos.exeremcos.exe

pid process

852 remcos.exe
1172 remcos.exe

pid	process
852	remcos.exe
1172	remcos.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

Quotation.exeremcos.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remcos\\remcos.exe\""	Quotation.exe
Key created	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\	remcos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remcos\\remcos.exe\""	remcos.exe
Key created	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\	Quotation.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

Quotation.exeremcos.exe

description	pid	process	target process
PID 4804 set thread context of 820	4804	Quotation.exe	Quotation.exe
PID 852 set thread context of 1172	852	remcos.exe	remcos.exe

Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

4396 schtasks.exe
Modifies registry class 1 IoCs

Processes:

Quotation.exe

description ioc process

Key created \REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000_Classes\Local Settings Quotation.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

remcos.exe

pid process

1172 remcos.exe
Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

Quotation.exeremcos.exe

pid process

4804 Quotation.exe
852 remcos.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

remcos.exe

pid process

1172 remcos.exe

pid	process
4396	schtasks.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000_Classes\Local Settings	Quotation.exe

pid	process
1172	remcos.exe

pid	process
4804	Quotation.exe
852	remcos.exe

pid	process
1172	remcos.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

Quotation.execmd.exeQuotation.exeWScript.execmd.exeremcos.exe

description	pid	process	target process
PID 4804 wrote to memory of 788	4804	Quotation.exe	cmd.exe
PID 4804 wrote to memory of 788	4804	Quotation.exe	cmd.exe
PID 4804 wrote to memory of 788	4804	Quotation.exe	cmd.exe
PID 4804 wrote to memory of 820	4804	Quotation.exe	Quotation.exe
PID 4804 wrote to memory of 820	4804	Quotation.exe	Quotation.exe
PID 4804 wrote to memory of 820	4804	Quotation.exe	Quotation.exe
PID 4804 wrote to memory of 820	4804	Quotation.exe	Quotation.exe
PID 788 wrote to memory of 4396	788	cmd.exe	schtasks.exe
PID 788 wrote to memory of 4396	788	cmd.exe	schtasks.exe
PID 788 wrote to memory of 4396	788	cmd.exe	schtasks.exe
PID 820 wrote to memory of 3924	820	Quotation.exe	WScript.exe
PID 820 wrote to memory of 3924	820	Quotation.exe	WScript.exe
PID 820 wrote to memory of 3924	820	Quotation.exe	WScript.exe
PID 3924 wrote to memory of 452	3924	WScript.exe	cmd.exe
PID 3924 wrote to memory of 452	3924	WScript.exe	cmd.exe
PID 3924 wrote to memory of 452	3924	WScript.exe	cmd.exe
PID 452 wrote to memory of 852	452	cmd.exe	remcos.exe
PID 452 wrote to memory of 852	452	cmd.exe	remcos.exe
PID 452 wrote to memory of 852	452	cmd.exe	remcos.exe
PID 852 wrote to memory of 1172	852	remcos.exe	remcos.exe
PID 852 wrote to memory of 1172	852	remcos.exe	remcos.exe
PID 852 wrote to memory of 1172	852	remcos.exe	remcos.exe
PID 852 wrote to memory of 1172	852	remcos.exe	remcos.exe

C:\Users\Admin\AppData\Local\Temp\Quotation.exe
"C:\Users\Admin\AppData\Local\Temp\Quotation.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4804

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /Create /TN name /XML "C:\Users\Admin\AppData\Local\Temp\1f3091a968c34196a6722074c331f0f3.xml"
2⤵
- Suspicious use of WriteProcessMemory
PID:788

C:\Windows\SysWOW64\schtasks.exe
schtasks /Create /TN name /XML "C:\Users\Admin\AppData\Local\Temp\1f3091a968c34196a6722074c331f0f3.xml"
3⤵
- Creates scheduled task(s)
PID:4396

C:\Users\Admin\AppData\Local\Temp\Quotation.exe
"C:\Users\Admin\AppData\Local\Temp\Quotation.exe"
2⤵
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:820

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
3⤵
- Suspicious use of WriteProcessMemory
PID:3924

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe"
4⤵
- Suspicious use of WriteProcessMemory
PID:452

C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:852

C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
6⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
PID:1172

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Registry Run Keys / Startup Folder

1

T1060

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\1f3091a968c34196a6722074c331f0f3.xml
MD5
aa2f6636e997aaa0b01fbc78b1dabe52

SHA1
fd462100fc91975dcbea8e361cf1eb8a70f6ad54

SHA256
d710b6eda22285684579d8b547e5be2f48883c4bf8db39993b00df30f9dc8723

SHA512
6540a3bbdbd3ab51679d5b32380e6c288bf6eba2777d067d40bfe65642ccafecd18028b102dfa46ac189d84282da2b6cb202a4f307587c5639f86834788f5104

Download Submit
C:\Users\Admin\AppData\Local\Temp\install.vbs
MD5
b92d64fe5b1d1f59df4b738262aea8df

SHA1
c8fb1981759c2d9bb2ec91b705985fba5fc7af63

SHA256
fa20e9aab03dc8e9f1910aaf0cf42662379fa16ae3a22642084fb97fa3d4f83a

SHA512
2566248b93c0cfb0414f033b8dd18bbd4f88180093eac2861107289bcb4ee160f9593706ff1f7d1f2e4ecea430d67a5a2897551a4f9ebd82b707243e300520e2

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
5d3efb4803c5ec263edc87d268c6035b

SHA1
d16a17af079d759e90f6fbb955455e00dd5d6df6

SHA256
6a9beed2218eb04e929a87b8e1e1fb1f5d3197136c96b434e82f9dd62e71233c

SHA512
1ed1da2650690e98aa10c498f8bba6562169a54bcb28a7cad53818c1f077de777de7d4888a4da8ef7a4c5a0b31d11b52357f01749ec51f391f46e17fc2045913

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
5d3efb4803c5ec263edc87d268c6035b

SHA1
d16a17af079d759e90f6fbb955455e00dd5d6df6

SHA256
6a9beed2218eb04e929a87b8e1e1fb1f5d3197136c96b434e82f9dd62e71233c

SHA512
1ed1da2650690e98aa10c498f8bba6562169a54bcb28a7cad53818c1f077de777de7d4888a4da8ef7a4c5a0b31d11b52357f01749ec51f391f46e17fc2045913

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
5d3efb4803c5ec263edc87d268c6035b

SHA1
d16a17af079d759e90f6fbb955455e00dd5d6df6

SHA256
6a9beed2218eb04e929a87b8e1e1fb1f5d3197136c96b434e82f9dd62e71233c

SHA512
1ed1da2650690e98aa10c498f8bba6562169a54bcb28a7cad53818c1f077de777de7d4888a4da8ef7a4c5a0b31d11b52357f01749ec51f391f46e17fc2045913

Download Submit
memory/452-11-0x0000000000000000-mapping.dmp

Download
memory/788-2-0x0000000000000000-mapping.dmp

Download
memory/820-6-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/820-3-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/820-4-0x0000000000413FA4-mapping.dmp

Download
memory/852-12-0x0000000000000000-mapping.dmp

Download
memory/852-18-0x0000000000A60000-0x0000000000A81000-memory.dmp

Filesize
132KB

Download
memory/1172-16-0x0000000000413FA4-mapping.dmp

Download
memory/3924-8-0x0000000000000000-mapping.dmp

Download
memory/4396-7-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads