remcos | c39bdd8f7c69c3140ef920e2b1d5965310058c5fa425b871f4d7751d8291d55e

Analysis

max time kernel
150s
max time network
147s
platform
windows7_x64
resource
win7v20201028
submitted
06-01-2021 18:00

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General

Target

ACTION2021.scr
Size

1.4MB
MD5

c6ed7e791f0c36826d3c55e196dd7bd4
SHA1

97e94a141b7d479fd14373f724ce3232c2b0c429
SHA256

c39bdd8f7c69c3140ef920e2b1d5965310058c5fa425b871f4d7751d8291d55e
SHA512

17b21afde88b6d4ebb2340da7fb506ee62da93172e62e8da7bd4cf505fbe0df305f65523b555b9804d938411f00571a2718ec4ca900482c264173e2a42121a4f

Score

10^/10

remcos evasion persistence rat spyware trojan

Malware Config

Extracted

Family

remcos

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 4 IoCs

Processes:

start.exestart.exestart.exestart.exe

pid process

844 start.exe
344 start.exe
1088 start.exe
1236 start.exe
Loads dropped DLL 2 IoCs

Processes:

cmd.exe

pid process

556 cmd.exe
556 cmd.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware

Data from Local System
T1005

Credentials in Files
T1081

pid	process
844	start.exe
344	start.exe
1088	start.exe
1236	start.exe

pid	process
556	cmd.exe
556	cmd.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
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\	ACTION2021.scr
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\start = "\"C:\\Users\\Admin\\AppData\\Roaming\\start\\start.exe\""	ACTION2021.scr
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\	start.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\start = "\"C:\\Users\\Admin\\AppData\\Roaming\\start\\start.exe\""	start.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

ACTION2021.scrstart.exestart.exe

description	pid	process	target process
PID 848 set thread context of 1488	848	ACTION2021.scr	ACTION2021.scr
PID 844 set thread context of 344	844	start.exe	start.exe
PID 344 set thread context of 1088	344	start.exe	start.exe
PID 344 set thread context of 1236	344	start.exe	start.exe

Modifies registry key 1 TTPs 2 IoCs

Modify Registry
T1112

Processes:

reg.exereg.exe

pid process

1536 reg.exe
1332 reg.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

ACTION2021.scrstart.exe

pid process

848 ACTION2021.scr
848 ACTION2021.scr
1088 start.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

ACTION2021.scr

description pid process

Token: SeDebugPrivilege 848 ACTION2021.scr
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

start.exe

pid process

344 start.exe

pid	process
1536	reg.exe
1332	reg.exe

pid	process
848	ACTION2021.scr
848	ACTION2021.scr
1088	start.exe

description	pid	process
Token: SeDebugPrivilege	848	ACTION2021.scr

pid	process
344	start.exe

Suspicious use of WriteProcessMemory 76 IoCs

Processes:

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

description	pid	process	target process
PID 848 wrote to memory of 1448	848	ACTION2021.scr	ACTION2021.scr
PID 848 wrote to memory of 1448	848	ACTION2021.scr	ACTION2021.scr
PID 848 wrote to memory of 1448	848	ACTION2021.scr	ACTION2021.scr
PID 848 wrote to memory of 1448	848	ACTION2021.scr	ACTION2021.scr
PID 848 wrote to memory of 1488	848	ACTION2021.scr	ACTION2021.scr
PID 848 wrote to memory of 1488	848	ACTION2021.scr	ACTION2021.scr
PID 848 wrote to memory of 1488	848	ACTION2021.scr	ACTION2021.scr
PID 848 wrote to memory of 1488	848	ACTION2021.scr	ACTION2021.scr
PID 848 wrote to memory of 1488	848	ACTION2021.scr	ACTION2021.scr
PID 848 wrote to memory of 1488	848	ACTION2021.scr	ACTION2021.scr
PID 848 wrote to memory of 1488	848	ACTION2021.scr	ACTION2021.scr
PID 848 wrote to memory of 1488	848	ACTION2021.scr	ACTION2021.scr
PID 848 wrote to memory of 1488	848	ACTION2021.scr	ACTION2021.scr
PID 848 wrote to memory of 1488	848	ACTION2021.scr	ACTION2021.scr
PID 848 wrote to memory of 1488	848	ACTION2021.scr	ACTION2021.scr
PID 1488 wrote to memory of 880	1488	ACTION2021.scr	cmd.exe
PID 1488 wrote to memory of 880	1488	ACTION2021.scr	cmd.exe
PID 1488 wrote to memory of 880	1488	ACTION2021.scr	cmd.exe
PID 1488 wrote to memory of 880	1488	ACTION2021.scr	cmd.exe
PID 880 wrote to memory of 1536	880	cmd.exe	reg.exe
PID 880 wrote to memory of 1536	880	cmd.exe	reg.exe
PID 880 wrote to memory of 1536	880	cmd.exe	reg.exe
PID 880 wrote to memory of 1536	880	cmd.exe	reg.exe
PID 1488 wrote to memory of 1580	1488	ACTION2021.scr	WScript.exe
PID 1488 wrote to memory of 1580	1488	ACTION2021.scr	WScript.exe
PID 1488 wrote to memory of 1580	1488	ACTION2021.scr	WScript.exe
PID 1488 wrote to memory of 1580	1488	ACTION2021.scr	WScript.exe
PID 1580 wrote to memory of 556	1580	WScript.exe	cmd.exe
PID 1580 wrote to memory of 556	1580	WScript.exe	cmd.exe
PID 1580 wrote to memory of 556	1580	WScript.exe	cmd.exe
PID 1580 wrote to memory of 556	1580	WScript.exe	cmd.exe
PID 556 wrote to memory of 844	556	cmd.exe	start.exe
PID 556 wrote to memory of 844	556	cmd.exe	start.exe
PID 556 wrote to memory of 844	556	cmd.exe	start.exe
PID 556 wrote to memory of 844	556	cmd.exe	start.exe
PID 844 wrote to memory of 344	844	start.exe	start.exe
PID 844 wrote to memory of 344	844	start.exe	start.exe
PID 844 wrote to memory of 344	844	start.exe	start.exe
PID 844 wrote to memory of 344	844	start.exe	start.exe
PID 844 wrote to memory of 344	844	start.exe	start.exe
PID 844 wrote to memory of 344	844	start.exe	start.exe
PID 844 wrote to memory of 344	844	start.exe	start.exe
PID 844 wrote to memory of 344	844	start.exe	start.exe
PID 844 wrote to memory of 344	844	start.exe	start.exe
PID 844 wrote to memory of 344	844	start.exe	start.exe
PID 844 wrote to memory of 344	844	start.exe	start.exe
PID 344 wrote to memory of 560	344	start.exe	cmd.exe
PID 344 wrote to memory of 560	344	start.exe	cmd.exe
PID 344 wrote to memory of 560	344	start.exe	cmd.exe
PID 344 wrote to memory of 560	344	start.exe	cmd.exe
PID 560 wrote to memory of 1332	560	cmd.exe	reg.exe
PID 560 wrote to memory of 1332	560	cmd.exe	reg.exe
PID 560 wrote to memory of 1332	560	cmd.exe	reg.exe
PID 560 wrote to memory of 1332	560	cmd.exe	reg.exe
PID 344 wrote to memory of 1088	344	start.exe	start.exe
PID 344 wrote to memory of 1088	344	start.exe	start.exe
PID 344 wrote to memory of 1088	344	start.exe	start.exe
PID 344 wrote to memory of 1088	344	start.exe	start.exe
PID 344 wrote to memory of 1088	344	start.exe	start.exe
PID 344 wrote to memory of 1088	344	start.exe	start.exe
PID 344 wrote to memory of 1088	344	start.exe	start.exe
PID 344 wrote to memory of 1088	344	start.exe	start.exe
PID 344 wrote to memory of 1088	344	start.exe	start.exe
PID 344 wrote to memory of 800	344	start.exe	start.exe

C:\Users\Admin\AppData\Local\Temp\ACTION2021.scr
"C:\Users\Admin\AppData\Local\Temp\ACTION2021.scr" /S
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:848

C:\Users\Admin\AppData\Local\Temp\ACTION2021.scr
"C:\Users\Admin\AppData\Local\Temp\ACTION2021.scr"
2⤵
PID:1448

C:\Users\Admin\AppData\Local\Temp\ACTION2021.scr
"C:\Users\Admin\AppData\Local\Temp\ACTION2021.scr"
2⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1488

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:880

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:1536

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
3⤵
- Suspicious use of WriteProcessMemory
PID:1580

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\start\start.exe"
4⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:556

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:844

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 SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:344

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:560

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:1332

C:\Users\Admin\AppData\Roaming\start\start.exe
C:\Users\Admin\AppData\Roaming\start\start.exe /stext "C:\Users\Admin\AppData\Local\Temp\yhcamtbcvyceyiwjqivyusqjl"
7⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:1088

C:\Users\Admin\AppData\Roaming\start\start.exe
C:\Users\Admin\AppData\Roaming\start\start.exe /stext "C:\Users\Admin\AppData\Local\Temp\ldvdnexxfomvlcgzqdctisgjcsaaoaic"
7⤵
- Executes dropped EXE
PID:1236

C:\Users\Admin\AppData\Roaming\start\start.exe
C:\Users\Admin\AppData\Roaming\start\start.exe /stext "C:\Users\Admin\AppData\Local\Temp\jbitmmmvjgurjokvhtqzfflaueqrv"
7⤵
PID:800

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Bypass User Account Control

T1088

Defense Evasion

Bypass User Account Control

T1088

Disabling Security Tools

T1089

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

Replay Monitor

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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\Local\Temp\yhcamtbcvyceyiwjqivyusqjl
MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

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
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
\Users\Admin\AppData\Roaming\start\start.exe
MD5
c6ed7e791f0c36826d3c55e196dd7bd4

SHA1
97e94a141b7d479fd14373f724ce3232c2b0c429

SHA256
c39bdd8f7c69c3140ef920e2b1d5965310058c5fa425b871f4d7751d8291d55e

SHA512
17b21afde88b6d4ebb2340da7fb506ee62da93172e62e8da7bd4cf505fbe0df305f65523b555b9804d938411f00571a2718ec4ca900482c264173e2a42121a4f

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

SHA1
97e94a141b7d479fd14373f724ce3232c2b0c429

SHA256
c39bdd8f7c69c3140ef920e2b1d5965310058c5fa425b871f4d7751d8291d55e

SHA512
17b21afde88b6d4ebb2340da7fb506ee62da93172e62e8da7bd4cf505fbe0df305f65523b555b9804d938411f00571a2718ec4ca900482c264173e2a42121a4f

Download Submit
memory/344-26-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/344-24-0x0000000000413FA4-mapping.dmp

Download
memory/556-13-0x0000000000000000-mapping.dmp

Download
memory/560-27-0x0000000000000000-mapping.dmp

Download
memory/844-17-0x0000000000000000-mapping.dmp

Download
memory/844-19-0x0000000074850000-0x0000000074F3E000-memory.dmp

Filesize
6.9MB

Download
memory/844-20-0x0000000000960000-0x0000000000961000-memory.dmp

Filesize
4KB

Download
memory/848-2-0x00000000748D0000-0x0000000074FBE000-memory.dmp

Filesize
6.9MB

Download
memory/848-5-0x0000000000410000-0x000000000043C000-memory.dmp

Filesize
176KB

Download
memory/848-3-0x0000000001060000-0x0000000001061000-memory.dmp

Filesize
4KB

Download
memory/880-9-0x0000000000000000-mapping.dmp

Download
memory/1088-29-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1088-33-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1088-37-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1088-30-0x0000000000476274-mapping.dmp

Download
memory/1236-36-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/1236-32-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/1236-34-0x0000000000455238-mapping.dmp

Download
memory/1236-38-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/1332-28-0x0000000000000000-mapping.dmp

Download
memory/1488-8-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1488-7-0x0000000000413FA4-mapping.dmp

Download
memory/1488-6-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1536-10-0x0000000000000000-mapping.dmp

Download
memory/1576-39-0x000007FEF6580000-0x000007FEF67FA000-memory.dmp

Filesize
2.5MB

Download
memory/1580-11-0x0000000000000000-mapping.dmp

Download