remcos | 6906ef12bac9de7c7867bb067e2c7415680e07ffca9b9b3523cc2843e2174d7b

Analysis

max time kernel
148s
max time network
149s
platform
windows10_x64
resource
win10v20210408
submitted
19/04/2021, 00:06

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General

Target
Factura Serfinanza010714008071991847569194350.exe
Size 128KB
Sample210419-68klzkcea2
SHA256 6906ef12bac9de7c7867bb067e2c7415680e07ffca9b9b3523cc2843e2174d7b
MD5 1a152aa6ddf352230b7351c563d675a3
SHA1 517ef6ac130eecc9ea1d0443552fd184187254f3
SHA512 1178ed0d9f9f2ce401860723aaa4f21981bd3a6186c0fad482a58c5a63e58b2461e1c0d051d6dd8763c4ed184051e700a755db190e072f06f73ed4c660356c3e
MD5 SHA1 SHA512

Score

10^/10

remcos persistence rat

Malware Config

Extracted

Family

remcos

databasepropersonombrecomercialideasearchwords.services:3521

Signatures

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

Executes dropped EXE 2 IoCs

pid	Process
2824	PxxoServicesTrialNet1.exe
2060	PxxoServicesTrialNet1.exe

Adds Run key 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-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\	Factura Serfinanza010714008071991847569194350.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\MservicesOrg2 = "\"C:\\Users\\Admin\\AppData\\Roaming\\System32\\PxxoServicesTrialNet1.exe\""	Factura Serfinanza010714008071991847569194350.exe
Key created	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\	PxxoServicesTrialNet1.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\MservicesOrg2 = "\"C:\\Users\\Admin\\AppData\\Roaming\\System32\\PxxoServicesTrialNet1.exe\""	PxxoServicesTrialNet1.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 856 set thread context of 3684	856	Factura Serfinanza010714008071991847569194350.exe	79
PID 2824 set thread context of 2060	2824	PxxoServicesTrialNet1.exe	85

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000_Classes\Local Settings	Factura Serfinanza010714008071991847569194350.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
856	Factura Serfinanza010714008071991847569194350.exe
856	Factura Serfinanza010714008071991847569194350.exe
856	Factura Serfinanza010714008071991847569194350.exe
856	Factura Serfinanza010714008071991847569194350.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	856	Factura Serfinanza010714008071991847569194350.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2060	PxxoServicesTrialNet1.exe

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 856 wrote to memory of 1676	856	Factura Serfinanza010714008071991847569194350.exe	77
PID 856 wrote to memory of 1676	856	Factura Serfinanza010714008071991847569194350.exe	77
PID 856 wrote to memory of 1676	856	Factura Serfinanza010714008071991847569194350.exe	77
PID 856 wrote to memory of 644	856	Factura Serfinanza010714008071991847569194350.exe	78
PID 856 wrote to memory of 644	856	Factura Serfinanza010714008071991847569194350.exe	78
PID 856 wrote to memory of 644	856	Factura Serfinanza010714008071991847569194350.exe	78
PID 856 wrote to memory of 3684	856	Factura Serfinanza010714008071991847569194350.exe	79
PID 856 wrote to memory of 3684	856	Factura Serfinanza010714008071991847569194350.exe	79
PID 856 wrote to memory of 3684	856	Factura Serfinanza010714008071991847569194350.exe	79
PID 856 wrote to memory of 3684	856	Factura Serfinanza010714008071991847569194350.exe	79
PID 856 wrote to memory of 3684	856	Factura Serfinanza010714008071991847569194350.exe	79
PID 856 wrote to memory of 3684	856	Factura Serfinanza010714008071991847569194350.exe	79
PID 856 wrote to memory of 3684	856	Factura Serfinanza010714008071991847569194350.exe	79
PID 856 wrote to memory of 3684	856	Factura Serfinanza010714008071991847569194350.exe	79
PID 856 wrote to memory of 3684	856	Factura Serfinanza010714008071991847569194350.exe	79
PID 856 wrote to memory of 3684	856	Factura Serfinanza010714008071991847569194350.exe	79
PID 3684 wrote to memory of 3596	3684	Factura Serfinanza010714008071991847569194350.exe	80
PID 3684 wrote to memory of 3596	3684	Factura Serfinanza010714008071991847569194350.exe	80
PID 3684 wrote to memory of 3596	3684	Factura Serfinanza010714008071991847569194350.exe	80
PID 3596 wrote to memory of 2204	3596	WScript.exe	82
PID 3596 wrote to memory of 2204	3596	WScript.exe	82
PID 3596 wrote to memory of 2204	3596	WScript.exe	82
PID 2204 wrote to memory of 2824	2204	cmd.exe	84
PID 2204 wrote to memory of 2824	2204	cmd.exe	84
PID 2204 wrote to memory of 2824	2204	cmd.exe	84
PID 2824 wrote to memory of 2060	2824	PxxoServicesTrialNet1.exe	85
PID 2824 wrote to memory of 2060	2824	PxxoServicesTrialNet1.exe	85
PID 2824 wrote to memory of 2060	2824	PxxoServicesTrialNet1.exe	85
PID 2824 wrote to memory of 2060	2824	PxxoServicesTrialNet1.exe	85
PID 2824 wrote to memory of 2060	2824	PxxoServicesTrialNet1.exe	85
PID 2824 wrote to memory of 2060	2824	PxxoServicesTrialNet1.exe	85
PID 2824 wrote to memory of 2060	2824	PxxoServicesTrialNet1.exe	85
PID 2824 wrote to memory of 2060	2824	PxxoServicesTrialNet1.exe	85
PID 2824 wrote to memory of 2060	2824	PxxoServicesTrialNet1.exe	85
PID 2824 wrote to memory of 2060	2824	PxxoServicesTrialNet1.exe	85

C:\Users\Admin\AppData\Local\Temp\Factura Serfinanza010714008071991847569194350.exe
"C:\Users\Admin\AppData\Local\Temp\Factura Serfinanza010714008071991847569194350.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:856
- C:\Users\Admin\AppData\Local\Temp\Factura Serfinanza010714008071991847569194350.exe
  "C:\Users\Admin\AppData\Local\Temp\Factura Serfinanza010714008071991847569194350.exe"
  2⤵
  PID:1676
- C:\Users\Admin\AppData\Local\Temp\Factura Serfinanza010714008071991847569194350.exe
  "C:\Users\Admin\AppData\Local\Temp\Factura Serfinanza010714008071991847569194350.exe"
  2⤵
  PID:644
- C:\Users\Admin\AppData\Local\Temp\Factura Serfinanza010714008071991847569194350.exe
  "C:\Users\Admin\AppData\Local\Temp\Factura Serfinanza010714008071991847569194350.exe"
  2⤵
  - Adds Run key to start application
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:3684
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3596
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2204
    - - C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe
        
        C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe
        5⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        Suspicious use of WriteProcessMemory
        
        PID:2824
      - C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe
        
        "C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe"
        6⤵
        Executes dropped EXE
        Adds Run key to start application
        Suspicious use of SetWindowsHookEx
        
        PID:2060

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/856-119-0x0000000006960000-0x0000000006961000-memory.dmp

Download

memory/856-118-0x0000000005120000-0x0000000005155000-memory.dmp

Download

memory/856-116-0x0000000005700000-0x0000000005701000-memory.dmp

Download

memory/856-114-0x0000000000DB0000-0x0000000000DB1000-memory.dmp

Download

memory/856-117-0x0000000005880000-0x0000000005881000-memory.dmp

Download

memory/2060-139-0x0000000000400000-0x0000000000422000-memory.dmp

Download

memory/2824-135-0x0000000004AC0000-0x0000000004AC1000-memory.dmp

Download

memory/3684-124-0x0000000000400000-0x0000000000422000-memory.dmp

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memory/3684-120-0x0000000000400000-0x0000000000422000-memory.dmp

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