remcos | fc8a93bf843f6396302208e194b752f5313320cb56173287dd37dccb774801a3

General

Target
tmpalyli_hx.exe
Size 560KB
Sample260601-18e7asgs4s
SHA256 fc8a93bf843f6396302208e194b752f5313320cb56173287dd37dccb774801a3
MD5 cd6f87a57f3d74b3c214b6bc5f3738fc
SHA1 4bd577db1ed9d130146632d29b72f3527127a47a
SHA512 0042e103d5722ce5cf025d4673c661a20675b61c6ff5c1318b7981fa168e9118a6c8d972706dc9944368adc6099c118c0808b88e3113dcc3abf317ea3d60944b
SSDEEP 6144:6hzOv2fM13jsIFSHNT7P/P6CNYLQ89/drLHgDezi0qenpq6qer9:66sM9oIoH1aLQA1zmeger
TLSH
T161C4E453EB829AE8D69D40B65F144640972EE5327A0F1361B95C930CCF6378B8F66E3C
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

doggy discovery remcos persistence rat

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

DOGGY

C2

tobi12345.hopto.org:40401

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
WIN32.exe
copy_folder
WIN32
delete_file
false
hide_file
false
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_gzufalnqzl
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screens
screenshot_path
%AppData%
screenshot_time
1
startup_value
win32
take_screenshot_option
false
take_screenshot_time
5

Signatures

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

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-1-5-21-889581200-2041691093-2048517887-1000\Control Panel\International\Geo\Nation	tmpalyli_hx.exe

Executes dropped EXE 2 IoCs

pid	Process
4544	WIN32.exe
3184	WIN32.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-889581200-2041691093-2048517887-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\win32 = "\"C:\\Users\\Admin\\AppData\\Roaming\\WIN32\\WIN32.exe\""	tmpalyli_hx.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-889581200-2041691093-2048517887-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\win32 = "\"C:\\Users\\Admin\\AppData\\Roaming\\WIN32\\WIN32.exe\""	WIN32.exe

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

System Information Discovery
T1082

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	tmpalyli_hx.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	WIN32.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
2980	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2980	PING.EXE

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4956 wrote to memory of 1424	4956	tmpalyli_hx.exe	87
PID 1424 wrote to memory of 2980	1424	cmd.exe	89
PID 1424 wrote to memory of 3184	1424	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\tmpalyli_hx.exe
"C:\Users\Admin\AppData\Local\Temp\tmpalyli_hx.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4956
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\install.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1424
- - 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:2980
- - C:\Users\Admin\AppData\Roaming\WIN32\WIN32.exe
    "C:\Users\Admin\AppData\Roaming\WIN32\WIN32.exe"
    3⤵
    - Executes dropped EXE
    PID:3184

C:\Users\Admin\AppData\Roaming\WIN32\WIN32.exe
"C:\Users\Admin\AppData\Roaming\WIN32\WIN32.exe"
1⤵
- Executes dropped EXE
- Adds Run key to start application
- System Location Discovery: System Language Discovery
PID:4544

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

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 97B
SHA256 490f55866ee8e293b55dcc8b1bb6540984b14dbe37ebe4c63e680a4ec99bf1e0
MD5 17ed9e21b67606761cdb252e347d2cb5
SHA1 81caae7993c48c4460b11706c1c96e21c9944dd1
SHA512 54bc65ecb702d5b096eee7ddeb7fc8f8791a2eba832448eec394868352548c0863fc90ce0af3696758127b3265bebdf5be05d46c201d8ebf0fb3a0edc86f732a
TLSH
T1DAB012360C80C1AF190205970DB8782AE016C4C4260A35084F8A0448197A501F4C6720
MD5 SHA1 SHA512 TLSH

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WIN32.exe

Path C:\Users\Admin\AppData\Roaming\WIN32\WIN32.exe
Size 560KB
SHA256 fc8a93bf843f6396302208e194b752f5313320cb56173287dd37dccb774801a3
MD5 cd6f87a57f3d74b3c214b6bc5f3738fc
SHA1 4bd577db1ed9d130146632d29b72f3527127a47a
SHA512 0042e103d5722ce5cf025d4673c661a20675b61c6ff5c1318b7981fa168e9118a6c8d972706dc9944368adc6099c118c0808b88e3113dcc3abf317ea3d60944b
SSDEEP 6144:6hzOv2fM13jsIFSHNT7P/P6CNYLQ89/drLHgDezi0qenpq6qer9:66sM9oIoH1aLQA1zmeger
TLSH
T161C4E453EB829AE8D69D40B65F144640972EE5327A0F1361B95C930CCF6378B8F66E3C
MD5 SHA1 SHA512 SSDEEP TLSH

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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