remcos | ec84a8bda79a0fd968138e6eb7bed4da519a44b4f24f30eceae26606bf73d5f0

General

Target

Assigned Document.exe
Size

836KB
MD5

f8d1358d21f301908cd951fc887d606b
SHA1

88d68c3dd045ec5245da41feb6130d49b62491f4
SHA256

ec84a8bda79a0fd968138e6eb7bed4da519a44b4f24f30eceae26606bf73d5f0
SHA512

37311fb807024e3ac1dfd558bbcb2d8b4f9eb9f6bf729cf9f65d7d94593ef3b29705a948eb6ded388bed4e0757a6ffa47dfb2cafbf8d590bcd4acd3ae02e32c5

Score

10^/10

remcos persistence rat

Malware Config

Extracted

Family

remcos

C2

remcos009s.duckdns.org:1980

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:

Assigned Document.exe

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

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

Assigned Document.exe

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

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

Processes:

Assigned Document.exe

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

Assigned Document.exe

pid process

1832 Assigned Document.exe
1832 Assigned Document.exe

pid	process
1832	Assigned Document.exe
1832	Assigned Document.exe

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

Assigned Document.exe

description	pid	process	target process
PID 1832 wrote to memory of 544	1832	Assigned Document.exe	ieinstal.exe
PID 1832 wrote to memory of 544	1832	Assigned Document.exe	ieinstal.exe
PID 1832 wrote to memory of 544	1832	Assigned Document.exe	ieinstal.exe
PID 1832 wrote to memory of 544	1832	Assigned Document.exe	ieinstal.exe
PID 1832 wrote to memory of 544	1832	Assigned Document.exe	ieinstal.exe
PID 1832 wrote to memory of 544	1832	Assigned Document.exe	ieinstal.exe
PID 1832 wrote to memory of 544	1832	Assigned Document.exe	ieinstal.exe
PID 1832 wrote to memory of 544	1832	Assigned Document.exe	ieinstal.exe
PID 1832 wrote to memory of 544	1832	Assigned Document.exe	ieinstal.exe
PID 1832 wrote to memory of 544	1832	Assigned Document.exe	ieinstal.exe
PID 1832 wrote to memory of 544	1832	Assigned Document.exe	ieinstal.exe
PID 1832 wrote to memory of 544	1832	Assigned Document.exe	ieinstal.exe
PID 1832 wrote to memory of 544	1832	Assigned Document.exe	ieinstal.exe
PID 1832 wrote to memory of 544	1832	Assigned Document.exe	ieinstal.exe
PID 1832 wrote to memory of 544	1832	Assigned Document.exe	ieinstal.exe
PID 1832 wrote to memory of 544	1832	Assigned Document.exe	ieinstal.exe
PID 1832 wrote to memory of 544	1832	Assigned Document.exe	ieinstal.exe
PID 1832 wrote to memory of 544	1832	Assigned Document.exe	ieinstal.exe
PID 1832 wrote to memory of 544	1832	Assigned Document.exe	ieinstal.exe

C:\Users\Admin\AppData\Local\Temp\Assigned Document.exe
"C:\Users\Admin\AppData\Local\Temp\Assigned Document.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:1832

C:\Program Files (x86)\internet explorer\ieinstal.exe
"C:\Program Files (x86)\internet explorer\ieinstal.exe"
2⤵
PID:544

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

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Downloads

memory/544-6-0x0000000000000000-mapping.dmp

Download
memory/544-7-0x00000000000D0000-0x00000000000D1000-memory.dmp

Filesize
4KB

Download
memory/544-5-0x0000000000090000-0x0000000000091000-memory.dmp

Filesize
4KB

Download
memory/544-9-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

Download
memory/544-15-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/544-14-0x0000000010540000-0x0000000010564000-memory.dmp

Filesize
144KB

Download
memory/1356-3-0x000007FEF5C30000-0x000007FEF5EAA000-memory.dmp

Filesize
2.5MB

Download
memory/1832-2-0x0000000075DE1000-0x0000000075DE3000-memory.dmp

Filesize
8KB

Download
memory/1832-4-0x00000000001B0000-0x00000000001B1000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads