remcos | d9e6d184148b47fd32eb6810a21ea8ee0b04d2cb5315d4a4cfbf12fe86ac67ab

General

Target
dhl_customer_form.jpg.exe
Size 837KB
Sample200701-rxwene11ze
SHA256 d9e6d184148b47fd32eb6810a21ea8ee0b04d2cb5315d4a4cfbf12fe86ac67ab
MD5 52e71e22fa49e223c9a36ee2cd98ae56
SHA1 15c423f95ef078884c203110844e9beaec777d54
SHA512 bd53b50397d252982c1ceb1ac9df2a8c6b58550892d0f4501f51ce9e5a1b3d71e37bd7e2de5838a748ddfc0e734bf2daba7c6e2a82ebaf690083addf78393bf2
MD5 SHA1 SHA512

Score

10^/10

rat remcos persistence

Malware Config

Extracted

Family

remcos

C2

hussanm.duckdns.org:7652

Signatures

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
1072	dhl_customer_form.jpg.exe
1632	remcos.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1072 set thread context of 1084	1072	dhl_customer_form.jpg.exe	24
PID 1632 set thread context of 600	1632	remcos.exe	29

Loads dropped DLL 2 IoCs

pid	Process
1424	cmd.exe
1424	cmd.exe

Executes dropped EXE 2 IoCs

pid	Process
1632	remcos.exe
600	remcos.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
600	remcos.exe

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

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1072 wrote to memory of 1084	1072	dhl_customer_form.jpg.exe	24
PID 1072 wrote to memory of 1084	1072	dhl_customer_form.jpg.exe	24
PID 1072 wrote to memory of 1084	1072	dhl_customer_form.jpg.exe	24
PID 1072 wrote to memory of 1084	1072	dhl_customer_form.jpg.exe	24
PID 1084 wrote to memory of 1424	1084	dhl_customer_form.jpg.exe	25
PID 1084 wrote to memory of 1424	1084	dhl_customer_form.jpg.exe	25
PID 1084 wrote to memory of 1424	1084	dhl_customer_form.jpg.exe	25
PID 1084 wrote to memory of 1424	1084	dhl_customer_form.jpg.exe	25
PID 1084 wrote to memory of 1424	1084	dhl_customer_form.jpg.exe	25
PID 1084 wrote to memory of 1424	1084	dhl_customer_form.jpg.exe	25
PID 1084 wrote to memory of 1424	1084	dhl_customer_form.jpg.exe	25
PID 1424 wrote to memory of 1520	1424	cmd.exe	27
PID 1424 wrote to memory of 1520	1424	cmd.exe	27
PID 1424 wrote to memory of 1520	1424	cmd.exe	27
PID 1424 wrote to memory of 1520	1424	cmd.exe	27
PID 1424 wrote to memory of 1632	1424	cmd.exe	28
PID 1424 wrote to memory of 1632	1424	cmd.exe	28
PID 1424 wrote to memory of 1632	1424	cmd.exe	28
PID 1424 wrote to memory of 1632	1424	cmd.exe	28
PID 1632 wrote to memory of 600	1632	remcos.exe	29
PID 1632 wrote to memory of 600	1632	remcos.exe	29
PID 1632 wrote to memory of 600	1632	remcos.exe	29
PID 1632 wrote to memory of 600	1632	remcos.exe	29

Adds Run entry to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Windows\CurrentVersion\Run\	dhl_customer_form.jpg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\remcos.exe\""	dhl_customer_form.jpg.exe
Key created	\REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Windows\CurrentVersion\Run\	remcos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\remcos.exe\""	remcos.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1520	PING.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1072	dhl_customer_form.jpg.exe
1632	remcos.exe

C:\Users\Admin\AppData\Local\Temp\dhl_customer_form.jpg.exe
"C:\Users\Admin\AppData\Local\Temp\dhl_customer_form.jpg.exe"
1⤵
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
- Suspicious behavior: EnumeratesProcesses
PID:1072
- C:\Users\Admin\AppData\Local\Temp\dhl_customer_form.jpg.exe
  "C:\Users\Admin\AppData\Local\Temp\dhl_customer_form.jpg.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  - Adds Run entry to start application
  PID:1084
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\install.bat" "
    3⤵
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:1424
  - - C:\Windows\SysWOW64\PING.EXE
      PING 127.0.0.1 -n 2
      4⤵
      Runs ping.exe
      PID:1520
  - - C:\Users\Admin\AppData\Roaming\remcos\remcos.exe
      "C:\Users\Admin\AppData\Roaming\remcos\remcos.exe"
      4⤵
      Suspicious behavior: MapViewOfSection
      Suspicious use of SetThreadContext
      Executes dropped EXE
      Suspicious use of WriteProcessMemory
      Suspicious behavior: EnumeratesProcesses
      PID:1632
    - - C:\Users\Admin\AppData\Roaming\remcos\remcos.exe
        
        "C:\Users\Admin\AppData\Roaming\remcos\remcos.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of SetWindowsHookEx
        Adds Run entry to start application
        
        PID:600

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Remote System Discovery

1

T1018

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/600-15-0x0000000000400000-0x0000000000417000-memory.dmp

Download

memory/1084-2-0x0000000000400000-0x0000000000417000-memory.dmp

Download

memory/1084-0-0x0000000000400000-0x0000000000417000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads