remcos | ccd9176d26caf90647653816162ea4622ae24e253b7da139fdfacd74a555a8a1

General

Target

PO-PDF_PDF.exe
Size

498KB
MD5

56f2689631039e478d381c489cd9ee01
SHA1

619b93e5742153b2c667b55b3c90d33fce0a795e
SHA256

ccd9176d26caf90647653816162ea4622ae24e253b7da139fdfacd74a555a8a1
SHA512

aaa9b20393a09c3699baf86cbd58f0e056dcd6257dc98196a9064a5339f2ef9d8e57f1e707fffd413be0cc86c603eca053f0ba7847ef280bba3bcc0db90158be

Score

10^/10

remcos persistence rat

Malware Config

Extracted

Family

remcos

C2

nkosarevaocs.duckdns.org:7266

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

1116 remcos.exe
3124 remcos.exe

pid	process
1116	remcos.exe
3124	remcos.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

remcos.exePO-PDF_PDF.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\	remcos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remcos\\remcos.exe\""	remcos.exe
Key created	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\	PO-PDF_PDF.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remcos\\remcos.exe\""	PO-PDF_PDF.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

PO-PDF_PDF.exeremcos.exe

description	pid	process	target process
PID 2432 set thread context of 3612	2432	PO-PDF_PDF.exe	PO-PDF_PDF.exe
PID 1116 set thread context of 3124	1116	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

3912 schtasks.exe
Modifies registry class 1 IoCs

Processes:

PO-PDF_PDF.exe

description ioc process

Key created \REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000_Classes\Local Settings PO-PDF_PDF.exe
Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

PO-PDF_PDF.exeremcos.exe

pid process

2432 PO-PDF_PDF.exe
1116 remcos.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

remcos.exe

pid process

3124 remcos.exe

pid	process
3912	schtasks.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000_Classes\Local Settings	PO-PDF_PDF.exe

pid	process
2432	PO-PDF_PDF.exe
1116	remcos.exe

pid	process
3124	remcos.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

PO-PDF_PDF.execmd.exePO-PDF_PDF.exeWScript.execmd.exeremcos.exe

description	pid	process	target process
PID 2432 wrote to memory of 3400	2432	PO-PDF_PDF.exe	cmd.exe
PID 2432 wrote to memory of 3400	2432	PO-PDF_PDF.exe	cmd.exe
PID 2432 wrote to memory of 3400	2432	PO-PDF_PDF.exe	cmd.exe
PID 2432 wrote to memory of 3612	2432	PO-PDF_PDF.exe	PO-PDF_PDF.exe
PID 2432 wrote to memory of 3612	2432	PO-PDF_PDF.exe	PO-PDF_PDF.exe
PID 2432 wrote to memory of 3612	2432	PO-PDF_PDF.exe	PO-PDF_PDF.exe
PID 2432 wrote to memory of 3612	2432	PO-PDF_PDF.exe	PO-PDF_PDF.exe
PID 3400 wrote to memory of 3912	3400	cmd.exe	schtasks.exe
PID 3400 wrote to memory of 3912	3400	cmd.exe	schtasks.exe
PID 3400 wrote to memory of 3912	3400	cmd.exe	schtasks.exe
PID 3612 wrote to memory of 3568	3612	PO-PDF_PDF.exe	WScript.exe
PID 3612 wrote to memory of 3568	3612	PO-PDF_PDF.exe	WScript.exe
PID 3612 wrote to memory of 3568	3612	PO-PDF_PDF.exe	WScript.exe
PID 3568 wrote to memory of 3616	3568	WScript.exe	cmd.exe
PID 3568 wrote to memory of 3616	3568	WScript.exe	cmd.exe
PID 3568 wrote to memory of 3616	3568	WScript.exe	cmd.exe
PID 3616 wrote to memory of 1116	3616	cmd.exe	remcos.exe
PID 3616 wrote to memory of 1116	3616	cmd.exe	remcos.exe
PID 3616 wrote to memory of 1116	3616	cmd.exe	remcos.exe
PID 1116 wrote to memory of 3124	1116	remcos.exe	remcos.exe
PID 1116 wrote to memory of 3124	1116	remcos.exe	remcos.exe
PID 1116 wrote to memory of 3124	1116	remcos.exe	remcos.exe
PID 1116 wrote to memory of 3124	1116	remcos.exe	remcos.exe

C:\Users\Admin\AppData\Local\Temp\PO-PDF_PDF.exe
"C:\Users\Admin\AppData\Local\Temp\PO-PDF_PDF.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2432

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /Create /TN name /XML "C:\Users\Admin\AppData\Local\Temp\81218996fd1c41f0995c36a56d2ab481.xml"
2⤵
- Suspicious use of WriteProcessMemory
PID:3400

C:\Windows\SysWOW64\schtasks.exe
schtasks /Create /TN name /XML "C:\Users\Admin\AppData\Local\Temp\81218996fd1c41f0995c36a56d2ab481.xml"
3⤵
- Creates scheduled task(s)
PID:3912

C:\Users\Admin\AppData\Local\Temp\PO-PDF_PDF.exe
"C:\Users\Admin\AppData\Local\Temp\PO-PDF_PDF.exe"
2⤵
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:3612

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
3⤵
- Suspicious use of WriteProcessMemory
PID:3568

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:3616

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:1116

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 use of SetWindowsHookEx
PID:3124

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\81218996fd1c41f0995c36a56d2ab481.xml
MD5
a36564afc14b3eb0849c01a3afdb9944

SHA1
4dcee9fae3fde4e46b08529bc0ba067150686f07

SHA256
9d4342f763c5d62a06f69aa6fdcb1caa376ff2f2c0972f36b487f73b4d221996

SHA512
782082aa36ae056734e90fc079c813dfef59420571a1b70cde4cf15eb6c870f85b2bfe0748ef4db9df3d010c08671bff744d78178ba75bf2ba02b665f044ae89

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
56f2689631039e478d381c489cd9ee01

SHA1
619b93e5742153b2c667b55b3c90d33fce0a795e

SHA256
ccd9176d26caf90647653816162ea4622ae24e253b7da139fdfacd74a555a8a1

SHA512
aaa9b20393a09c3699baf86cbd58f0e056dcd6257dc98196a9064a5339f2ef9d8e57f1e707fffd413be0cc86c603eca053f0ba7847ef280bba3bcc0db90158be

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
56f2689631039e478d381c489cd9ee01

SHA1
619b93e5742153b2c667b55b3c90d33fce0a795e

SHA256
ccd9176d26caf90647653816162ea4622ae24e253b7da139fdfacd74a555a8a1

SHA512
aaa9b20393a09c3699baf86cbd58f0e056dcd6257dc98196a9064a5339f2ef9d8e57f1e707fffd413be0cc86c603eca053f0ba7847ef280bba3bcc0db90158be

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
56f2689631039e478d381c489cd9ee01

SHA1
619b93e5742153b2c667b55b3c90d33fce0a795e

SHA256
ccd9176d26caf90647653816162ea4622ae24e253b7da139fdfacd74a555a8a1

SHA512
aaa9b20393a09c3699baf86cbd58f0e056dcd6257dc98196a9064a5339f2ef9d8e57f1e707fffd413be0cc86c603eca053f0ba7847ef280bba3bcc0db90158be

Download Submit
memory/1116-10-0x0000000000000000-mapping.dmp

Download
memory/3124-13-0x0000000000413FA4-mapping.dmp

Download
memory/3124-15-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/3400-2-0x0000000000000000-mapping.dmp

Download
memory/3568-6-0x0000000000000000-mapping.dmp

Download
memory/3612-3-0x0000000000413FA4-mapping.dmp

Download
memory/3612-8-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/3616-9-0x0000000000000000-mapping.dmp

Download
memory/3912-4-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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