remcos | 60119cfc3cd6b63295c163fad7ab43949d62d5ed6bb024cd3054a2c64e8339c7

General

Target

USD35900.exe
Size

836KB
MD5

1982963b64d323f39033d40641437595
SHA1

8dde953e501af236d8be98dbf6d683fda458ba38
SHA256

60119cfc3cd6b63295c163fad7ab43949d62d5ed6bb024cd3054a2c64e8339c7
SHA512

75481182ea78ca9e6ee9022db2e2cfb869419a779e37e149d8c70da3e3f8132dcffcb53a368311bd7dfbe13dab1ee2eae7846aefd361848a375f91d4f61e31b1

Score

10^/10

remcos persistence rat

Malware Config

Extracted

Family

remcos

C2

79.134.225.19:2556

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

USD35900.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\Yqjbm = "C:\\Users\\Admin\\mbjqY.url"	USD35900.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs
adware spyware

Modify Registry
T1112

Processes:

USD35900.exe

description ioc process

Key created \REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Main USD35900.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Main	USD35900.exe

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

Processes:

USD35900.exe

description	ioc	process
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13\Blob = 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	USD35900.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13	USD35900.exe

Script User-Agent 2 IoCs

Uses user-agent string associated with script host/environment.

Processes:

description	flow	ioc
HTTP User-Agent header	4	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	6	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

USD35900.exe

pid process

2032 USD35900.exe
2032 USD35900.exe

pid	process
2032	USD35900.exe
2032	USD35900.exe

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

USD35900.exe

description	pid	process	target process
PID 2032 wrote to memory of 2004	2032	USD35900.exe	ieinstal.exe
PID 2032 wrote to memory of 2004	2032	USD35900.exe	ieinstal.exe
PID 2032 wrote to memory of 2004	2032	USD35900.exe	ieinstal.exe
PID 2032 wrote to memory of 2004	2032	USD35900.exe	ieinstal.exe
PID 2032 wrote to memory of 2004	2032	USD35900.exe	ieinstal.exe
PID 2032 wrote to memory of 2004	2032	USD35900.exe	ieinstal.exe
PID 2032 wrote to memory of 2004	2032	USD35900.exe	ieinstal.exe
PID 2032 wrote to memory of 2004	2032	USD35900.exe	ieinstal.exe
PID 2032 wrote to memory of 2004	2032	USD35900.exe	ieinstal.exe
PID 2032 wrote to memory of 2004	2032	USD35900.exe	ieinstal.exe
PID 2032 wrote to memory of 2004	2032	USD35900.exe	ieinstal.exe
PID 2032 wrote to memory of 2004	2032	USD35900.exe	ieinstal.exe
PID 2032 wrote to memory of 2004	2032	USD35900.exe	ieinstal.exe
PID 2032 wrote to memory of 2004	2032	USD35900.exe	ieinstal.exe
PID 2032 wrote to memory of 2004	2032	USD35900.exe	ieinstal.exe
PID 2032 wrote to memory of 2004	2032	USD35900.exe	ieinstal.exe
PID 2032 wrote to memory of 2004	2032	USD35900.exe	ieinstal.exe
PID 2032 wrote to memory of 2004	2032	USD35900.exe	ieinstal.exe
PID 2032 wrote to memory of 2004	2032	USD35900.exe	ieinstal.exe

C:\Users\Admin\AppData\Local\Temp\USD35900.exe
"C:\Users\Admin\AppData\Local\Temp\USD35900.exe"
1⤵
- Adds Run key to start application
- Modifies Internet Explorer settings
- Modifies system certificate store
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2032

C:\Program Files (x86)\internet explorer\ieinstal.exe
"C:\Program Files (x86)\internet explorer\ieinstal.exe"
2⤵
PID:2004

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

3

T1112

Install Root Certificate

1

T1130

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/848-3-0x000007FEF6B90000-0x000007FEF6E0A000-memory.dmp

Filesize
2.5MB

Download
memory/2004-5-0x0000000000110000-0x0000000000111000-memory.dmp

Filesize
4KB

Download
memory/2004-6-0x0000000000000000-mapping.dmp

Download
memory/2004-7-0x0000000000150000-0x0000000000151000-memory.dmp

Filesize
4KB

Download
memory/2004-9-0x0000000000240000-0x0000000000241000-memory.dmp

Filesize
4KB

Download
memory/2004-15-0x0000000010540000-0x0000000010564000-memory.dmp

Filesize
144KB

Download
memory/2004-16-0x0000000000250000-0x0000000000271000-memory.dmp

Filesize
132KB

Download
memory/2032-2-0x0000000075C31000-0x0000000075C33000-memory.dmp

Filesize
8KB

Download
memory/2032-4-0x00000000001B0000-0x00000000001B1000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads