remcos | 37893b0a1a9e93a7e967c2d785fa0c6d19b0d0fa03c75e976a530a11fde4d6d7

General

Target
TG88 App.exe
Size 644KB
Sample261108-ps5apscv3v
SHA256 37893b0a1a9e93a7e967c2d785fa0c6d19b0d0fa03c75e976a530a11fde4d6d7
MD5 aefeec29ec8d78ea2a0a5d2c2acce6bb
SHA1 103cf593d58c34288d98fca5fb973500ad4fbe02
SHA512 bdb367b32b403ad316cd4de03d667b2f0201d0067d36e39248ca7835584876cc6e8471078450f06729bf03250c2185a6322b8fdb87cd146374ee88512793d889
SSDEEP 12288:5IfxS5XkH4nOqwitNfuquCwgs69gy3V5v+BNyo3PoL5aDz:e5GXkH4nnwitNfuq9wgs3y3V5vgNyo3E
TLSH
T1A5E46D59A39402F8D0B7C135C982953BE7B2BC065571472F03E70E9B2F276A16F3AB16
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

remotehost discovery remcos persistence rat

Malware Config

Extracted

Family

remcos

Version

7.3.1 Pro

Botnet

RemoteHost

C2

jobgrow.phpdevelopment.co:8080
api.jobgrow.phpdevelopment.co:8080
malware.jobgrow.phpdevelopment.co:8080
backdoor.jobgrow.phpdevelopment.co:8080
www.jobgrow.phpdevelopment.co:8080
webmail.jobgrow.phpdevelopment.co:8080
c2.jobgrow.phpdevelopment.co:8080

Attributes

audio_folder
MicRecords
audio_path
ApplicationPath
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
WinService.exe
copy_folder
Update
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
true
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-8UYI4O
screenshot_crypt
false
screenshot_flag
true
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
take_screenshot_option
true
take_screenshot_time
5
take_screenshot_title
facebook;discord;telegram

Signatures

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

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\	WinService.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Rmc-8UYI4O = "\"C:\\ProgramData\\Update\\WinService.exe\""	WinService.exe
Key created	\REGISTRY\MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\	TG88 App.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Rmc-8UYI4O = "\"C:\\ProgramData\\Update\\WinService.exe\""	TG88 App.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-1-5-21-3718455638-2296795630-1576855121-1000\Control Panel\International\Geo\Nation	TG88 App.exe

Executes dropped EXE 1 IoCs

pid	Process
2028	WinService.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-1-5-21-3718455638-2296795630-1576855121-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-8UYI4O = "\"C:\\ProgramData\\Update\\WinService.exe\""	TG88 App.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-8UYI4O = "\"C:\\ProgramData\\Update\\WinService.exe\""	TG88 App.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3718455638-2296795630-1576855121-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-8UYI4O = "\"C:\\ProgramData\\Update\\WinService.exe\""	WinService.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-8UYI4O = "\"C:\\ProgramData\\Update\\WinService.exe\""	WinService.exe

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

System Information Discovery
T1082

Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	WinService.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	WinService.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2028	WinService.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: 33	1228	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	1228	AUDIODG.EXE

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2028	WinService.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2028	WinService.exe

Suspicious use of WriteProcessMemory 1 IoCs

description	pid	Process	procid_target
PID 2712 wrote to memory of 2028	2712	TG88 App.exe	84

C:\Users\Admin\AppData\Local\Temp\TG88 App.exe
"C:\Users\Admin\AppData\Local\Temp\TG88 App.exe"
1⤵
- Adds policy Run key to start application
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2712
- C:\ProgramData\Update\WinService.exe
  "C:\ProgramData\Update\WinService.exe"
  2⤵
  - Adds policy Run key to start application
  - Executes dropped EXE
  - Adds Run key to start application
  - Reads the TCP/IP host and domain name from the registry
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:2028

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x2ec 0x2cc
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1228

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

2

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

2

T1547.001

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Network Configuration Discovery

1

T1016

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

WinService.exe

Path C:\ProgramData\Update\WinService.exe
Size 644KB
SHA256 37893b0a1a9e93a7e967c2d785fa0c6d19b0d0fa03c75e976a530a11fde4d6d7
MD5 aefeec29ec8d78ea2a0a5d2c2acce6bb
SHA1 103cf593d58c34288d98fca5fb973500ad4fbe02
SHA512 bdb367b32b403ad316cd4de03d667b2f0201d0067d36e39248ca7835584876cc6e8471078450f06729bf03250c2185a6322b8fdb87cd146374ee88512793d889
SSDEEP 12288:5IfxS5XkH4nOqwitNfuquCwgs69gy3V5v+BNyo3PoL5aDz:e5GXkH4nnwitNfuq9wgs3y3V5vgNyo3E
TLSH
T1A5E46D59A39402F8D0B7C135C982953BE7B2BC065571472F03E70E9B2F276A16F3AB16
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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