remcos | c39bdd8f7c69c3140ef920e2b1d5965310058c5fa425b871f4d7751d8291d55e

General

Target

ACTION2021.scr
Size

1.4MB
MD5

c6ed7e791f0c36826d3c55e196dd7bd4
SHA1

97e94a141b7d479fd14373f724ce3232c2b0c429
SHA256

c39bdd8f7c69c3140ef920e2b1d5965310058c5fa425b871f4d7751d8291d55e
SHA512

17b21afde88b6d4ebb2340da7fb506ee62da93172e62e8da7bd4cf505fbe0df305f65523b555b9804d938411f00571a2718ec4ca900482c264173e2a42121a4f

Score

10^/10

remcos evasion persistence rat trojan

Malware Config

Extracted

Family

remcos

C2

masters4733.sytes.net:8686

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
UAC bypass 3 TTPs
evasion trojan

Bypass User Account Control
T1088

Disabling Security Tools
T1089

Modify Registry
T1112
Executes dropped EXE 2 IoCs

Processes:

start.exestart.exe

pid process

1188 start.exe
1896 start.exe

pid	process
1188	start.exe
1896	start.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

ACTION2021.scrstart.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\start = "\"C:\\Users\\Admin\\AppData\\Roaming\\start\\start.exe\""	ACTION2021.scr
Key created	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\	start.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\start = "\"C:\\Users\\Admin\\AppData\\Roaming\\start\\start.exe\""	start.exe
Key created	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\	ACTION2021.scr

Suspicious use of SetThreadContext 2 IoCs

Processes:

ACTION2021.scrstart.exe

description	pid	process	target process
PID 4800 set thread context of 4284	4800	ACTION2021.scr	ACTION2021.scr
PID 1188 set thread context of 1896	1188	start.exe	start.exe

Modifies registry class 1 IoCs

Processes:

ACTION2021.scr

description ioc process

Key created \REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000_Classes\Local Settings ACTION2021.scr
Modifies registry key 1 TTPs 2 IoCs

Modify Registry
T1112

Processes:

reg.exereg.exe

pid process

2560 reg.exe
3284 reg.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

start.exe

pid process

1896 start.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000_Classes\Local Settings	ACTION2021.scr

pid	process
2560	reg.exe
3284	reg.exe

pid	process
1896	start.exe

Suspicious use of WriteProcessMemory 41 IoCs

Processes:

ACTION2021.scrACTION2021.scrcmd.exeWScript.execmd.exestart.exestart.execmd.exe

description	pid	process	target process
PID 4800 wrote to memory of 4284	4800	ACTION2021.scr	ACTION2021.scr
PID 4800 wrote to memory of 4284	4800	ACTION2021.scr	ACTION2021.scr
PID 4800 wrote to memory of 4284	4800	ACTION2021.scr	ACTION2021.scr
PID 4800 wrote to memory of 4284	4800	ACTION2021.scr	ACTION2021.scr
PID 4800 wrote to memory of 4284	4800	ACTION2021.scr	ACTION2021.scr
PID 4800 wrote to memory of 4284	4800	ACTION2021.scr	ACTION2021.scr
PID 4800 wrote to memory of 4284	4800	ACTION2021.scr	ACTION2021.scr
PID 4800 wrote to memory of 4284	4800	ACTION2021.scr	ACTION2021.scr
PID 4800 wrote to memory of 4284	4800	ACTION2021.scr	ACTION2021.scr
PID 4800 wrote to memory of 4284	4800	ACTION2021.scr	ACTION2021.scr
PID 4284 wrote to memory of 4360	4284	ACTION2021.scr	cmd.exe
PID 4284 wrote to memory of 4360	4284	ACTION2021.scr	cmd.exe
PID 4284 wrote to memory of 4360	4284	ACTION2021.scr	cmd.exe
PID 4360 wrote to memory of 3284	4360	cmd.exe	reg.exe
PID 4360 wrote to memory of 3284	4360	cmd.exe	reg.exe
PID 4360 wrote to memory of 3284	4360	cmd.exe	reg.exe
PID 4284 wrote to memory of 684	4284	ACTION2021.scr	WScript.exe
PID 4284 wrote to memory of 684	4284	ACTION2021.scr	WScript.exe
PID 4284 wrote to memory of 684	4284	ACTION2021.scr	WScript.exe
PID 684 wrote to memory of 8	684	WScript.exe	cmd.exe
PID 684 wrote to memory of 8	684	WScript.exe	cmd.exe
PID 684 wrote to memory of 8	684	WScript.exe	cmd.exe
PID 8 wrote to memory of 1188	8	cmd.exe	start.exe
PID 8 wrote to memory of 1188	8	cmd.exe	start.exe
PID 8 wrote to memory of 1188	8	cmd.exe	start.exe
PID 1188 wrote to memory of 1896	1188	start.exe	start.exe
PID 1188 wrote to memory of 1896	1188	start.exe	start.exe
PID 1188 wrote to memory of 1896	1188	start.exe	start.exe
PID 1188 wrote to memory of 1896	1188	start.exe	start.exe
PID 1188 wrote to memory of 1896	1188	start.exe	start.exe
PID 1188 wrote to memory of 1896	1188	start.exe	start.exe
PID 1188 wrote to memory of 1896	1188	start.exe	start.exe
PID 1188 wrote to memory of 1896	1188	start.exe	start.exe
PID 1188 wrote to memory of 1896	1188	start.exe	start.exe
PID 1188 wrote to memory of 1896	1188	start.exe	start.exe
PID 1896 wrote to memory of 2324	1896	start.exe	cmd.exe
PID 1896 wrote to memory of 2324	1896	start.exe	cmd.exe
PID 1896 wrote to memory of 2324	1896	start.exe	cmd.exe
PID 2324 wrote to memory of 2560	2324	cmd.exe	reg.exe
PID 2324 wrote to memory of 2560	2324	cmd.exe	reg.exe
PID 2324 wrote to memory of 2560	2324	cmd.exe	reg.exe

C:\Users\Admin\AppData\Local\Temp\ACTION2021.scr
"C:\Users\Admin\AppData\Local\Temp\ACTION2021.scr" /S
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4800

C:\Users\Admin\AppData\Local\Temp\ACTION2021.scr
"C:\Users\Admin\AppData\Local\Temp\ACTION2021.scr"
2⤵
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4284

C:\Windows\SysWOW64\cmd.exe
/k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
3⤵
- Suspicious use of WriteProcessMemory
PID:4360

C:\Windows\SysWOW64\reg.exe
C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
4⤵
- Modifies registry key
PID:3284

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
3⤵
- Suspicious use of WriteProcessMemory
PID:684

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\start\start.exe"
4⤵
- Suspicious use of WriteProcessMemory
PID:8

C:\Users\Admin\AppData\Roaming\start\start.exe
C:\Users\Admin\AppData\Roaming\start\start.exe
5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1188

C:\Users\Admin\AppData\Roaming\start\start.exe
"C:\Users\Admin\AppData\Roaming\start\start.exe"
6⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1896

C:\Windows\SysWOW64\cmd.exe
/k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
7⤵
- Suspicious use of WriteProcessMemory
PID:2324

C:\Windows\SysWOW64\reg.exe
C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
8⤵
- Modifies registry key
PID:2560

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Bypass User Account Control

1

T1088

Defense Evasion

Bypass User Account Control

1

T1088

Disabling Security Tools

1

T1089

Modify Registry

3

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\install.vbs
MD5
a9df62f02c776af7a9eb2a1f9a4fb408

SHA1
e6f5add446a134ff353d10eff8ea26f30b7cd839

SHA256
196620c6cc4a5f5382d44d597229d72ac5fe42e1e4e9faa63527d414fedc8e86

SHA512
8c7d143dc9c623246148b8e7dd8e0487fb6988a12e9614b37c48246e501c88c946001edcdf019201c89b8fe5dd3604674dfd8d96c4ae1b706ac48c64c09dae07

Download Submit
C:\Users\Admin\AppData\Roaming\start\start.exe
MD5
c6ed7e791f0c36826d3c55e196dd7bd4

SHA1
97e94a141b7d479fd14373f724ce3232c2b0c429

SHA256
c39bdd8f7c69c3140ef920e2b1d5965310058c5fa425b871f4d7751d8291d55e

SHA512
17b21afde88b6d4ebb2340da7fb506ee62da93172e62e8da7bd4cf505fbe0df305f65523b555b9804d938411f00571a2718ec4ca900482c264173e2a42121a4f

Download Submit
C:\Users\Admin\AppData\Roaming\start\start.exe
MD5
c6ed7e791f0c36826d3c55e196dd7bd4

SHA1
97e94a141b7d479fd14373f724ce3232c2b0c429

SHA256
c39bdd8f7c69c3140ef920e2b1d5965310058c5fa425b871f4d7751d8291d55e

SHA512
17b21afde88b6d4ebb2340da7fb506ee62da93172e62e8da7bd4cf505fbe0df305f65523b555b9804d938411f00571a2718ec4ca900482c264173e2a42121a4f

Download Submit
C:\Users\Admin\AppData\Roaming\start\start.exe
MD5
c6ed7e791f0c36826d3c55e196dd7bd4

SHA1
97e94a141b7d479fd14373f724ce3232c2b0c429

SHA256
c39bdd8f7c69c3140ef920e2b1d5965310058c5fa425b871f4d7751d8291d55e

SHA512
17b21afde88b6d4ebb2340da7fb506ee62da93172e62e8da7bd4cf505fbe0df305f65523b555b9804d938411f00571a2718ec4ca900482c264173e2a42121a4f

Download Submit
memory/8-17-0x0000000000000000-mapping.dmp

Download
memory/684-15-0x0000000000000000-mapping.dmp

Download
memory/1188-21-0x00000000739D0000-0x00000000740BE000-memory.dmp

Filesize
6.9MB

Download
memory/1188-18-0x0000000000000000-mapping.dmp

Download
memory/1896-30-0x0000000000413FA4-mapping.dmp

Download
memory/1896-32-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2324-33-0x0000000000000000-mapping.dmp

Download
memory/2560-34-0x0000000000000000-mapping.dmp

Download
memory/3284-14-0x0000000000000000-mapping.dmp

Download
memory/4284-10-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4284-12-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4284-11-0x0000000000413FA4-mapping.dmp

Download
memory/4360-13-0x0000000000000000-mapping.dmp

Download
memory/4800-7-0x00000000055E0000-0x00000000055E1000-memory.dmp

Filesize
4KB

Download
memory/4800-2-0x00000000739D0000-0x00000000740BE000-memory.dmp

Filesize
6.9MB

Download
memory/4800-5-0x0000000004BE0000-0x0000000004BE1000-memory.dmp

Filesize
4KB

Download
memory/4800-3-0x0000000000020000-0x0000000000021000-memory.dmp

Filesize
4KB

Download
memory/4800-9-0x0000000004B50000-0x0000000004B51000-memory.dmp

Filesize
4KB

Download
memory/4800-8-0x0000000004D20000-0x0000000004D21000-memory.dmp

Filesize
4KB

Download
memory/4800-6-0x0000000004A60000-0x0000000004A8C000-memory.dmp

Filesize
176KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads