remcos | c0b1ba178d886a9d71fb7ffd5b169bf023021e13c545e3cd8d15461221dd2006

General

Target

New REMCOS TES.exe
Size

878KB
MD5

611eb8ef2416aa09b16bbce28e1ec33a
SHA1

20dfdd65a715575754c903ffcbe871ce82f2736b
SHA256

c0b1ba178d886a9d71fb7ffd5b169bf023021e13c545e3cd8d15461221dd2006
SHA512

63147896ce05d9f0a4e44f2f4a4d00f1a631219e114cb05ba40c662b0f6b828b9f95ba96a175503a6a496ad4c5e2b968f2c56ca8f0a8f782887e23ad2bdec023

Score

10^/10

rat remcos persistence

Malware Config

Extracted

Family

remcos

C2

185.140.53.209:1990

Signatures

Executes dropped EXE 2 IoCs

pid	Process
1976	chrome.exe
2572	chrome.exe

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

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
976	New REMCOS TES.exe
1976	chrome.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 976 set thread context of 3876	976	New REMCOS TES.exe	67
PID 1976 set thread context of 2572	1976	chrome.exe	72

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2572	chrome.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2572	chrome.exe

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-1-5-21-2066881839-3229799743-3576549721-1000\Software\Microsoft\Windows\CurrentVersion\Run\	chrome.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2066881839-3229799743-3576549721-1000\Software\Microsoft\Windows\CurrentVersion\Run\localhost = "\"C:\\Users\\Admin\\AppData\\Roaming\\chrome.exe\""	chrome.exe
Key created	\REGISTRY\USER\S-1-5-21-2066881839-3229799743-3576549721-1000\Software\Microsoft\Windows\CurrentVersion\Run\	New REMCOS TES.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2066881839-3229799743-3576549721-1000\Software\Microsoft\Windows\CurrentVersion\Run\localhost = "\"C:\\Users\\Admin\\AppData\\Roaming\\chrome.exe\""	New REMCOS TES.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2066881839-3229799743-3576549721-1000_Classes\Local Settings	New REMCOS TES.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
976	New REMCOS TES.exe
976	New REMCOS TES.exe
1976	chrome.exe
1976	chrome.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 976 wrote to memory of 3876	976	New REMCOS TES.exe	67
PID 976 wrote to memory of 3876	976	New REMCOS TES.exe	67
PID 976 wrote to memory of 3876	976	New REMCOS TES.exe	67
PID 3876 wrote to memory of 3948	3876	New REMCOS TES.exe	68
PID 3876 wrote to memory of 3948	3876	New REMCOS TES.exe	68
PID 3876 wrote to memory of 3948	3876	New REMCOS TES.exe	68
PID 3948 wrote to memory of 3992	3948	WScript.exe	69
PID 3948 wrote to memory of 3992	3948	WScript.exe	69
PID 3948 wrote to memory of 3992	3948	WScript.exe	69
PID 3992 wrote to memory of 1976	3992	cmd.exe	71
PID 3992 wrote to memory of 1976	3992	cmd.exe	71
PID 3992 wrote to memory of 1976	3992	cmd.exe	71
PID 1976 wrote to memory of 2572	1976	chrome.exe	72
PID 1976 wrote to memory of 2572	1976	chrome.exe	72
PID 1976 wrote to memory of 2572	1976	chrome.exe	72

C:\Users\Admin\AppData\Local\Temp\New REMCOS TES.exe
"C:\Users\Admin\AppData\Local\Temp\New REMCOS TES.exe"
1⤵
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:976
- C:\Users\Admin\AppData\Local\Temp\New REMCOS TES.exe
  "C:\Users\Admin\AppData\Local\Temp\New REMCOS TES.exe"
  2⤵
  - Adds Run entry to start application
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:3876
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3948
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\chrome.exe"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3992
    - - C:\Users\Admin\AppData\Roaming\chrome.exe
        
        C:\Users\Admin\AppData\Roaming\chrome.exe
        5⤵
        Executes dropped EXE
        Suspicious behavior: MapViewOfSection
        Suspicious use of SetThreadContext
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of WriteProcessMemory
        
        PID:1976
      - C:\Users\Admin\AppData\Roaming\chrome.exe
        
        C:\Users\Admin\AppData\Roaming\chrome.exe
        6⤵
        Executes dropped EXE
        Suspicious use of SetWindowsHookEx
        Suspicious behavior: GetForegroundWindowSpam
        Adds Run entry to start application
        
        PID:2572

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2572-12-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/3876-0-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/3876-2-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download

Analysis

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