remcos | 12406113bf77ef464b517b360b5c8c0f980528ee2e261b5c744e6a586465f4fd

General

Target
12406113bf77ef464b517b360b5c8c0f980528ee2e261b5c744e6a586465f4fd.exe
Size 92KB
Sample261007-ythb1avz3j
SHA256 12406113bf77ef464b517b360b5c8c0f980528ee2e261b5c744e6a586465f4fd
MD5 9868e70d736bb9d3bce81576e8dfff3f
SHA1 2d35b51a4b140bd61b212c2dc8ec6f663c3fb35d
SHA512 350d7c52b7101690cbf0c1771a43165a4e07136df237f46a5bc2dfbb3f1251286cfca90a49ef06af220800340ed37fa50927a35dd41e2a0fa90347069062d730
SSDEEP 1536:ohhW0YTGZWdVseJxaM9kraLdV2QkQ1TbPX8IHOCkIsI4ESHNTh9E+JP19qkP6krj:uhzYTGWVvJ8f2v1TbPzuMsIFSHNThy+X
TLSH
T12793D813FA4AD0B2E46591F145426F32CEBCBC3636492173D38FCA41AD79892D416EAF
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

host discovery execution remcos persistence rat

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

C2

surfrides.co:443
malware.surfrides.co:443
c2.surfrides.co:443

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
vremea.me.exe
copy_folder
remcos
delete_file
true
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
keylog_path
%AppData%
mouse_option
false
mutex
remcos_clubskjlibmmfta
screenshot_crypt
false
screenshot_flag
true
screenshot_folder
Screens
screenshot_path
%AppData%
screenshot_time
1
startup_value
remcos
take_screenshot_option
false
take_screenshot_time
5

Signatures

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

Modifies WinLogon for persistence 2 TTPs 6 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\WINDOWS\\system32\\userinit.exe, \"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\vremea.me.exe\""	12406113bf77ef464b517b360b5c8c0f980528ee2e261b5c744e6a586465f4fd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\vremea.me.exe\""	vremea.me.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\WINDOWS\\system32\\userinit.exe, \"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\vremea.me.exe\""	vremea.me.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\vremea.me.exe\""	vremea.me.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\WINDOWS\\system32\\userinit.exe, \"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\vremea.me.exe\""	vremea.me.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\vremea.me.exe\""	12406113bf77ef464b517b360b5c8c0f980528ee2e261b5c744e6a586465f4fd.exe

Adds policy Run key to start application 2 TTPs 6 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	12406113bf77ef464b517b360b5c8c0f980528ee2e261b5c744e6a586465f4fd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\vremea.me.exe\""	12406113bf77ef464b517b360b5c8c0f980528ee2e261b5c744e6a586465f4fd.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	vremea.me.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\vremea.me.exe\""	vremea.me.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	vremea.me.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\vremea.me.exe\""	vremea.me.exe

Checks computer location settings 2 TTPs 1 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-1-5-21-1696934516-3600988056-1840298893-1000\Control Panel\International\Geo\Nation	12406113bf77ef464b517b360b5c8c0f980528ee2e261b5c744e6a586465f4fd.exe

Executes dropped EXE 2 IoCs

pid	Process
4576	vremea.me.exe
2836	vremea.me.exe

Adds Run key to start application 2 TTPs 6 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1696934516-3600988056-1840298893-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\vremea.me.exe\""	12406113bf77ef464b517b360b5c8c0f980528ee2e261b5c744e6a586465f4fd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\vremea.me.exe\""	12406113bf77ef464b517b360b5c8c0f980528ee2e261b5c744e6a586465f4fd.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1696934516-3600988056-1840298893-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\vremea.me.exe\""	vremea.me.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\vremea.me.exe\""	vremea.me.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1696934516-3600988056-1840298893-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\vremea.me.exe\""	vremea.me.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\vremea.me.exe\""	vremea.me.exe

Modifies WinLogon 2 TTPs 3 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\	12406113bf77ef464b517b360b5c8c0f980528ee2e261b5c744e6a586465f4fd.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\	vremea.me.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\	vremea.me.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4576 set thread context of 1992	4576	vremea.me.exe	95
PID 2836 set thread context of 5100	2836	vremea.me.exe	97

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

System Information Discovery
T1082

Executes a command shell one-liner 1 TTPs 1 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
4948	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	12406113bf77ef464b517b360b5c8c0f980528ee2e261b5c744e6a586465f4fd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vremea.me.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vremea.me.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
1648	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1648	PING.EXE

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3056 wrote to memory of 4948	3056	12406113bf77ef464b517b360b5c8c0f980528ee2e261b5c744e6a586465f4fd.exe	88
PID 4948 wrote to memory of 1648	4948	cmd.exe	90
PID 4576 wrote to memory of 1992	4576	vremea.me.exe	95
PID 4576 wrote to memory of 1992	4576	vremea.me.exe	95
PID 4576 wrote to memory of 1992	4576	vremea.me.exe	95
PID 4576 wrote to memory of 1992	4576	vremea.me.exe	95
PID 4576 wrote to memory of 1992	4576	vremea.me.exe	95
PID 4576 wrote to memory of 1992	4576	vremea.me.exe	95
PID 4948 wrote to memory of 2836	4948	cmd.exe	96
PID 2836 wrote to memory of 5100	2836	vremea.me.exe	97
PID 2836 wrote to memory of 5100	2836	vremea.me.exe	97
PID 2836 wrote to memory of 5100	2836	vremea.me.exe	97
PID 2836 wrote to memory of 5100	2836	vremea.me.exe	97
PID 2836 wrote to memory of 5100	2836	vremea.me.exe	97
PID 2836 wrote to memory of 5100	2836	vremea.me.exe	97

C:\Users\Admin\AppData\Local\Temp\12406113bf77ef464b517b360b5c8c0f980528ee2e261b5c744e6a586465f4fd.exe
"C:\Users\Admin\AppData\Local\Temp\12406113bf77ef464b517b360b5c8c0f980528ee2e261b5c744e6a586465f4fd.exe"
1⤵
- Modifies WinLogon for persistence
- Adds policy Run key to start application
- Checks computer location settings
- Adds Run key to start application
- Modifies WinLogon
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3056
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\install.bat" "
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4948
- - C:\Windows\SysWOW64\PING.EXE
    PING 127.0.0.1 -n 2
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1648
- - C:\Users\Admin\AppData\Roaming\remcos\vremea.me.exe
    "C:\Users\Admin\AppData\Roaming\remcos\vremea.me.exe"
    3⤵
    - Modifies WinLogon for persistence
    - Adds policy Run key to start application
    - Executes dropped EXE
    - Adds Run key to start application
    - Modifies WinLogon
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2836
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
      4⤵
      PID:5100

C:\Users\Admin\AppData\Roaming\remcos\vremea.me.exe
"C:\Users\Admin\AppData\Roaming\remcos\vremea.me.exe"
1⤵
- Modifies WinLogon for persistence
- Adds policy Run key to start application
- Executes dropped EXE
- Adds Run key to start application
- Modifies WinLogon
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4576
- C:\Program Files (x86)\Internet Explorer\iexplore.exe
  "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
  2⤵
  PID:1992

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

Persistence

Boot or Logon Autostart Execution

4

T1547

Registry Run Keys / Startup Folder

2

T1547.001

Winlogon Helper DLL

2

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

4

T1547

Registry Run Keys / Startup Folder

2

T1547.001

Winlogon Helper DLL

2

T1547.004

Defense Evasion

Modify Registry

4

T1112

Credential Access

Discovery

Query Registry

1

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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install.bat

Path C:\Users\Admin\AppData\Local\Temp\install.bat
Size 212B
SHA256 7ca11f09081b74ab104cd084c8c536dd6f2fd99bccfab983478ae0d08c871348
MD5 d47129d3a21efa39d4ac443be6fed525
SHA1 1d84f6b2f4bf089e907746921179df445107ff76
SHA512 ce5076141c999876d03a2339e1a4f21f91258fad9e594c3c8ef2b79bc004cf43bc02df470a967e3242e75c81df957b1018146ea1f540d0c1d8719c2b517c4f8e
TLSH
T171D022A3C28282FE394B1CF72ABEB8ACC021E8C9B6123204061248CC36D2028F8C3914
MD5 SHA1 SHA512 TLSH

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vremea.me.exe

Path C:\Users\Admin\AppData\Roaming\remcos\vremea.me.exe
Size 92KB
SHA256 12406113bf77ef464b517b360b5c8c0f980528ee2e261b5c744e6a586465f4fd
MD5 9868e70d736bb9d3bce81576e8dfff3f
SHA1 2d35b51a4b140bd61b212c2dc8ec6f663c3fb35d
SHA512 350d7c52b7101690cbf0c1771a43165a4e07136df237f46a5bc2dfbb3f1251286cfca90a49ef06af220800340ed37fa50927a35dd41e2a0fa90347069062d730
SSDEEP 1536:ohhW0YTGZWdVseJxaM9kraLdV2QkQ1TbPX8IHOCkIsI4ESHNTh9E+JP19qkP6krj:uhzYTGWVvJ8f2v1TbPzuMsIFSHNThy+X
TLSH
T12793D813FA4AD0B2E46591F145426F32CEBCBC3636492173D38FCA41AD79892D416EAF
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1992-8-0x0000000000400000-0x0000000000417000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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