remcos | 51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8

Analysis

max time kernel
152s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
30/11/2022, 20:30

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General

Target
SecuriteInfo.com.Win32.PWSX-gen.19506.24395.exe
Size 1.2MB
Sample221130-y97a3ace33
SHA256 51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8
MD5 24f46e6a07749b312571d0ea20f8b343
SHA1 b234bb98d390b044af8be8a40aef651bd273a304
SHA512 e152b7f5049690cf357fb9aba9210d8f0dcffcc354ad18efe871f0af428cf3cbaee1e1e1c1eedfc60b9a4802bad2d63ed73ca1c7883cb365a4836aa73e0f303e
SSDEEP 24576:kTutACnAy0mX6+JANYMVCYDJlsbuSsXzTRjJQJ8pBcO:wutUJGANYMVCYDJlsrEvhJpI
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos xp persistence rat

Malware Config

Extracted

Family

remcos

Botnet

xpremcuz300622.ddns.net:3542

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
oos.exe
delete_file
false
hide_file
true
hide_keylog_file
false
install_flag
true
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Remcos-MMP2I7
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
kkl
take_screenshot_option
false
take_screenshot_time
5

Signatures

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

Executes dropped EXE 2 IoCs

pid	Process
3412	oos.exe
4712	oos.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	SecuriteInfo.com.Win32.PWSX-gen.19506.24395.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	WScript.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows\CurrentVersion\Run\	oos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	oos.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	oos.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	oos.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows\CurrentVersion\Run\	SecuriteInfo.com.Win32.PWSX-gen.19506.24395.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	SecuriteInfo.com.Win32.PWSX-gen.19506.24395.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	SecuriteInfo.com.Win32.PWSX-gen.19506.24395.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	SecuriteInfo.com.Win32.PWSX-gen.19506.24395.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 840 set thread context of 1180	840	SecuriteInfo.com.Win32.PWSX-gen.19506.24395.exe	85
PID 3412 set thread context of 4712	3412	oos.exe	91

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-1-5-21-2295526160-1155304984-640977766-1000_Classes\Local Settings	SecuriteInfo.com.Win32.PWSX-gen.19506.24395.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4712	oos.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 840 wrote to memory of 1180	840	SecuriteInfo.com.Win32.PWSX-gen.19506.24395.exe	85
PID 840 wrote to memory of 1180	840	SecuriteInfo.com.Win32.PWSX-gen.19506.24395.exe	85
PID 840 wrote to memory of 1180	840	SecuriteInfo.com.Win32.PWSX-gen.19506.24395.exe	85
PID 840 wrote to memory of 1180	840	SecuriteInfo.com.Win32.PWSX-gen.19506.24395.exe	85
PID 840 wrote to memory of 1180	840	SecuriteInfo.com.Win32.PWSX-gen.19506.24395.exe	85
PID 840 wrote to memory of 1180	840	SecuriteInfo.com.Win32.PWSX-gen.19506.24395.exe	85
PID 840 wrote to memory of 1180	840	SecuriteInfo.com.Win32.PWSX-gen.19506.24395.exe	85
PID 840 wrote to memory of 1180	840	SecuriteInfo.com.Win32.PWSX-gen.19506.24395.exe	85
PID 840 wrote to memory of 1180	840	SecuriteInfo.com.Win32.PWSX-gen.19506.24395.exe	85
PID 840 wrote to memory of 1180	840	SecuriteInfo.com.Win32.PWSX-gen.19506.24395.exe	85
PID 840 wrote to memory of 1180	840	SecuriteInfo.com.Win32.PWSX-gen.19506.24395.exe	85
PID 840 wrote to memory of 1180	840	SecuriteInfo.com.Win32.PWSX-gen.19506.24395.exe	85
PID 1180 wrote to memory of 2092	1180	SecuriteInfo.com.Win32.PWSX-gen.19506.24395.exe	86
PID 1180 wrote to memory of 2092	1180	SecuriteInfo.com.Win32.PWSX-gen.19506.24395.exe	86
PID 1180 wrote to memory of 2092	1180	SecuriteInfo.com.Win32.PWSX-gen.19506.24395.exe	86
PID 2092 wrote to memory of 220	2092	WScript.exe	87
PID 2092 wrote to memory of 220	2092	WScript.exe	87
PID 2092 wrote to memory of 220	2092	WScript.exe	87
PID 220 wrote to memory of 3412	220	cmd.exe	90
PID 220 wrote to memory of 3412	220	cmd.exe	90
PID 220 wrote to memory of 3412	220	cmd.exe	90
PID 3412 wrote to memory of 4712	3412	oos.exe	91
PID 3412 wrote to memory of 4712	3412	oos.exe	91
PID 3412 wrote to memory of 4712	3412	oos.exe	91
PID 3412 wrote to memory of 4712	3412	oos.exe	91
PID 3412 wrote to memory of 4712	3412	oos.exe	91
PID 3412 wrote to memory of 4712	3412	oos.exe	91
PID 3412 wrote to memory of 4712	3412	oos.exe	91
PID 3412 wrote to memory of 4712	3412	oos.exe	91
PID 3412 wrote to memory of 4712	3412	oos.exe	91
PID 3412 wrote to memory of 4712	3412	oos.exe	91
PID 3412 wrote to memory of 4712	3412	oos.exe	91
PID 3412 wrote to memory of 4712	3412	oos.exe	91

C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.PWSX-gen.19506.24395.exe
"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.PWSX-gen.19506.24395.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:840
- C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.PWSX-gen.19506.24395.exe
  "{path}"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:1180
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
    3⤵
    - Checks computer location settings
    - Suspicious use of WriteProcessMemory
    PID:2092
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\oos.exe"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:220
    - - C:\Users\Admin\AppData\Roaming\oos.exe
        
        C:\Users\Admin\AppData\Roaming\oos.exe
        5⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        Suspicious use of WriteProcessMemory
        
        PID:3412
      - C:\Users\Admin\AppData\Roaming\oos.exe
        
        "{path}"
        6⤵
        Executes dropped EXE
        Adds Run key to start application
        Suspicious use of SetWindowsHookEx
        
        PID:4712

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

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

install.vbs

Path C:\Users\Admin\AppData\Local\Temp\install.vbs
Size 398B
SHA256 960a570da95b8d16809cbcc18e8ca4d81e16cb666354ddc1d572daf93f291f02
MD5 a5d3440f90cbfae712166e20870eaed7
SHA1 cc1e1a2945eb2ad475234344f7527ad9e9873647
SHA512 d3136a280fbb326ccc5cb5ab1214aed8ccd6baa7f3f89ef9e0b5bf391a957dab2c121640bb056e6cbda0594f83133c4dbb4e1e2f0e290b44a401cd2cf8cfd4aa
MD5 SHA1 SHA512

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oos.exe

Path C:\Users\Admin\AppData\Roaming\oos.exe
Size 1.2MB
SHA256 51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8
MD5 24f46e6a07749b312571d0ea20f8b343
SHA1 b234bb98d390b044af8be8a40aef651bd273a304
SHA512 e152b7f5049690cf357fb9aba9210d8f0dcffcc354ad18efe871f0af428cf3cbaee1e1e1c1eedfc60b9a4802bad2d63ed73ca1c7883cb365a4836aa73e0f303e
SSDEEP 24576:kTutACnAy0mX6+JANYMVCYDJlsbuSsXzTRjJQJ8pBcO:wutUJGANYMVCYDJlsrEvhJpI
MD5 SHA1 SHA512 SSDEEP

Submit Download

oos.exe

Path C:\Users\Admin\AppData\Roaming\oos.exe
Size 1.2MB
SHA256 51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8
MD5 24f46e6a07749b312571d0ea20f8b343
SHA1 b234bb98d390b044af8be8a40aef651bd273a304
SHA512 e152b7f5049690cf357fb9aba9210d8f0dcffcc354ad18efe871f0af428cf3cbaee1e1e1c1eedfc60b9a4802bad2d63ed73ca1c7883cb365a4836aa73e0f303e
SSDEEP 24576:kTutACnAy0mX6+JANYMVCYDJlsbuSsXzTRjJQJ8pBcO:wutUJGANYMVCYDJlsrEvhJpI
MD5 SHA1 SHA512 SSDEEP

Submit Download

oos.exe

Path C:\Users\Admin\AppData\Roaming\oos.exe
Size 1.2MB
SHA256 51cd8a9f4c1a4ef234ad2b69e36415377a4f73afa08f9b69d85f7bdc30d17bb8
MD5 24f46e6a07749b312571d0ea20f8b343
SHA1 b234bb98d390b044af8be8a40aef651bd273a304
SHA512 e152b7f5049690cf357fb9aba9210d8f0dcffcc354ad18efe871f0af428cf3cbaee1e1e1c1eedfc60b9a4802bad2d63ed73ca1c7883cb365a4836aa73e0f303e
SSDEEP 24576:kTutACnAy0mX6+JANYMVCYDJlsbuSsXzTRjJQJ8pBcO:wutUJGANYMVCYDJlsrEvhJpI
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/840-133-0x0000000005890000-0x0000000005E34000-memory.dmp

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memory/840-134-0x0000000005380000-0x0000000005412000-memory.dmp

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memory/840-135-0x00000000054C0000-0x000000000555C000-memory.dmp

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memory/840-136-0x0000000005430000-0x000000000543A000-memory.dmp

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memory/840-132-0x00000000008D0000-0x00000000009FC000-memory.dmp

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memory/1180-143-0x0000000000400000-0x000000000047E000-memory.dmp

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memory/1180-141-0x0000000000400000-0x000000000047E000-memory.dmp

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memory/1180-140-0x0000000000400000-0x000000000047E000-memory.dmp

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memory/1180-139-0x0000000000400000-0x000000000047E000-memory.dmp

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memory/1180-138-0x0000000000400000-0x000000000047E000-memory.dmp

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memory/4712-152-0x0000000000400000-0x000000000047E000-memory.dmp

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memory/4712-153-0x0000000000400000-0x000000000047E000-memory.dmp

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memory/4712-154-0x0000000000400000-0x000000000047E000-memory.dmp

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memory/4712-155-0x0000000000400000-0x000000000047E000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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