remcos | 334c23c94f9c6587e2afd0689796daa8791fda9b823b23836893b86f5cce849f

General

Target
334c23c94f9c6587e2afd0689796daa8791fda9b823b23836893b86f5cce849f.exe
Size 92KB
Sample260804-s41cnstdqg
SHA256 334c23c94f9c6587e2afd0689796daa8791fda9b823b23836893b86f5cce849f
MD5 99e19c4a4a8a972005902bf6129867e9
SHA1 6f77809c678265c7beaa9bfd7f8eabffc78513e8
SHA512 e216d880e785751375a7f3c8d1f532e530e06351f146a5f39cd4de6386993f81a37abe04b4d8c4c4db596e8730e766b994fde05a417085be3afb378c2da2ebf6
SSDEEP 1536:FhhW0YTGZWdVseJxaM9kraLdV2QkQ1TbPX8IHOCkIsI4ESHNTh9E+JP19qkP6:7hzYTGWVvJ8f2v1TbPzuMsIFSHNThy+
TLSH
T1CE93C713FA4AD0B2E42591F146426F32CEBCBC3636492173D38FCA419D79892D456EBE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

1877 defense_evasion discovery execution remcos persistence rat

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

1877

C2

hawler.duckdns.org:2404
5.206.227.115:2404

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
svshost.exe
copy_folder
1877
delete_file
false
hide_file
true
hide_keylog_file
false
install_flag
true
install_path
%WinDir%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
1877
keylog_path
%AppData%
mouse_option
true
mutex
1877_spelzoyulk
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screens
screenshot_path
%AppData%
screenshot_time
1
startup_value
Google Update
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 4 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\Shell = "explorer.exe, \"C:\\Windows\\1877\\svshost.exe\""	334c23c94f9c6587e2afd0689796daa8791fda9b823b23836893b86f5cce849f.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\WINDOWS\\system32\\userinit.exe, \"C:\\Windows\\1877\\svshost.exe\""	334c23c94f9c6587e2afd0689796daa8791fda9b823b23836893b86f5cce849f.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Windows\\1877\\svshost.exe\""	svshost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\WINDOWS\\system32\\userinit.exe, \"C:\\Windows\\1877\\svshost.exe\""	svshost.exe

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 2 IoCs

defense_evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	334c23c94f9c6587e2afd0689796daa8791fda9b823b23836893b86f5cce849f.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	svshost.exe

Adds policy Run key to start application 2 TTPs 4 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	334c23c94f9c6587e2afd0689796daa8791fda9b823b23836893b86f5cce849f.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Google Update = "\"C:\\Windows\\1877\\svshost.exe\""	334c23c94f9c6587e2afd0689796daa8791fda9b823b23836893b86f5cce849f.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	svshost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Google Update = "\"C:\\Windows\\1877\\svshost.exe\""	svshost.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-1-5-21-3054922120-1500138384-519748408-1000\Control Panel\International\Geo\Nation	334c23c94f9c6587e2afd0689796daa8791fda9b823b23836893b86f5cce849f.exe

Executes dropped EXE 2 IoCs

pid	Process
1228	svshost.exe
1916	svshost.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3054922120-1500138384-519748408-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Google Update = "\"C:\\Windows\\1877\\svshost.exe\""	334c23c94f9c6587e2afd0689796daa8791fda9b823b23836893b86f5cce849f.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Google Update = "\"C:\\Windows\\1877\\svshost.exe\""	334c23c94f9c6587e2afd0689796daa8791fda9b823b23836893b86f5cce849f.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3054922120-1500138384-519748408-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Google Update = "\"C:\\Windows\\1877\\svshost.exe\""	svshost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Google Update = "\"C:\\Windows\\1877\\svshost.exe\""	svshost.exe

Modifies WinLogon 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\	334c23c94f9c6587e2afd0689796daa8791fda9b823b23836893b86f5cce849f.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\	svshost.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\1877\svshost.exe	334c23c94f9c6587e2afd0689796daa8791fda9b823b23836893b86f5cce849f.exe
File opened for modification	C:\Windows\1877\svshost.exe	334c23c94f9c6587e2afd0689796daa8791fda9b823b23836893b86f5cce849f.exe
File opened for modification	C:\Windows\1877	334c23c94f9c6587e2afd0689796daa8791fda9b823b23836893b86f5cce849f.exe

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
972	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 4 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	334c23c94f9c6587e2afd0689796daa8791fda9b823b23836893b86f5cce849f.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	svshost.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
4956	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4956	PING.EXE

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1228	svshost.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1540 wrote to memory of 972	1540	334c23c94f9c6587e2afd0689796daa8791fda9b823b23836893b86f5cce849f.exe	83
PID 972 wrote to memory of 4956	972	cmd.exe	85
PID 972 wrote to memory of 1916	972	cmd.exe	89

C:\Users\Admin\AppData\Local\Temp\334c23c94f9c6587e2afd0689796daa8791fda9b823b23836893b86f5cce849f.exe
"C:\Users\Admin\AppData\Local\Temp\334c23c94f9c6587e2afd0689796daa8791fda9b823b23836893b86f5cce849f.exe"
1⤵
- Modifies WinLogon for persistence
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Adds policy Run key to start application
- Checks computer location settings
- Adds Run key to start application
- Modifies WinLogon
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1540
- 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:972
- - 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:4956
- - C:\Windows\1877\svshost.exe
    "C:\Windows\1877\svshost.exe"
    3⤵
    - Executes dropped EXE
    PID:1916

C:\Windows\1877\svshost.exe
"C:\Windows\1877\svshost.exe"
1⤵
- Modifies WinLogon for persistence
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Adds policy Run key to start application
- Executes dropped EXE
- Adds Run key to start application
- Modifies WinLogon
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
PID:1228

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

Virtualization/Sandbox Evasion

1

T1497

Credential Access

Discovery

Query Registry

2

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

Virtualization/Sandbox Evasion

1

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

install.bat

Path C:\Users\Admin\AppData\Local\Temp\install.bat
Size 78B
SHA256 969621479c4bc68f58f32db1d20a5f389200fee6cdf30e73fe70072184f58afb
MD5 f35509e5938343750502f45e998f8d0c
SHA1 74efa4a149f83d677bdf347149d33e0c25cb5af0
SHA512 abb32f92b0dc6d76a5dd83a4d9268e321092626a5b810cbb9c96347e1b40d98ccada231b8d6ad5d5252a2e24082c88f184b201c399106248ea3de564b3483091
TLSH
T155A022320C30C0FF8A030E3C0C8E3F23F302E88220032C8808AC0008ACB3000B8CFA20
MD5 SHA1 SHA512 TLSH

Submit Download

svshost.exe

Path C:\Windows\1877\svshost.exe
Size 92KB
SHA256 334c23c94f9c6587e2afd0689796daa8791fda9b823b23836893b86f5cce849f
MD5 99e19c4a4a8a972005902bf6129867e9
SHA1 6f77809c678265c7beaa9bfd7f8eabffc78513e8
SHA512 e216d880e785751375a7f3c8d1f532e530e06351f146a5f39cd4de6386993f81a37abe04b4d8c4c4db596e8730e766b994fde05a417085be3afb378c2da2ebf6
SSDEEP 1536:FhhW0YTGZWdVseJxaM9kraLdV2QkQ1TbPX8IHOCkIsI4ESHNTh9E+JP19qkP6:7hzYTGWVvJ8f2v1TbPzuMsIFSHNThy+
TLSH
T1CE93C713FA4AD0B2E42591F146426F32CEBCBC3636492173D38FCA419D79892D456EBE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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