remcos | 7ea4571de61d421b79dd0cc3a117b1a36516a8cfc932d4673c9780e442f3184b

General

Target
88vbet.exe
Size 645KB
Sample261006-va526sssbx
SHA256 7ea4571de61d421b79dd0cc3a117b1a36516a8cfc932d4673c9780e442f3184b
MD5 fd78a33c007b80d2826b77dca55182e0
SHA1 d1caf9c70ef24f7956cf8f4e3d18788892925e92
SHA512 04f2e5590bd8714d40777d3e54b43ddd40b677fc025e89ffec5c2b0196bbec4840245fbd9023beb00e9b59b4d21b519b0d810c4c7e124c1769a4fb2473918733
SSDEEP 12288:TIfxS5XkH4nOqwitNfuquCwgs69gy3V5v+BNyo3PoL5aDz:U5GXkH4nnwitNfuq9wgs3y3V5vgNyo3E
TLSH
T110E46D59A39402F8D0B7C135C982953BE7B2BC065571472F03D70E9B2F276A16F3AB26
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

remotehost discovery remcos persistence rat suricata

Malware Config

Extracted

Family

remcos

Version

7.3.1 Pro

Botnet

RemoteHost

C2

8kbet.video:8080
api.8kbet.video:8080
c2.8kbet.video:8080
backdoor.8kbet.video:8080
malware.8kbet.video:8080
www.8kbet.video:8080

Attributes

audio_folder
MicRecords
audio_path
%Temp%
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
Update.exe
copy_folder
fsp
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
okvip
mouse_option
false
mutex
RemcosFocus-CD92GP
screenshot_crypt
false
screenshot_flag
true
screenshot_folder
Screenshots
screenshot_path
%SystemDrive%
screenshot_time
5
startup_value
take_screenshot_option
true
take_screenshot_time
5
take_screenshot_title
chrome;discord;facebook;telegram;whatsapp;youtube;instagram;tiktok;spotify;netflix;zoom;teams;slack;steam;vlc;coccoc

Signatures

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

Suricata alert: REMCOS RAT Malware Outbound C2 Communication 12 IoCs

Network activity triggered a Suricata alert

suricata remcos

flow	pid	Process
5	4916	Update.exe
5	4916	Update.exe
7	4916	Update.exe
7	4916	Update.exe
4	4916	Update.exe
4	4916	Update.exe
8	4916	Update.exe
8	4916	Update.exe
9	4916	Update.exe
9	4916	Update.exe
10	4916	Update.exe
10	4916	Update.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\	88vbet.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\RemcosFocus-CD92GP = "\"C:\\ProgramData\\fsp\\Update.exe\""	88vbet.exe
Key created	\REGISTRY\MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\	Update.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\RemcosFocus-CD92GP = "\"C:\\ProgramData\\fsp\\Update.exe\""	Update.exe

Executes dropped EXE 1 IoCs

pid	Process
4916	Update.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-1-5-21-4154726816-2055034831-2297277433-1000\Software\Microsoft\Windows\CurrentVersion\Run\RemcosFocus-CD92GP = "\"C:\\ProgramData\\fsp\\Update.exe\""	88vbet.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\RemcosFocus-CD92GP = "\"C:\\ProgramData\\fsp\\Update.exe\""	88vbet.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4154726816-2055034831-2297277433-1000\Software\Microsoft\Windows\CurrentVersion\Run\RemcosFocus-CD92GP = "\"C:\\ProgramData\\fsp\\Update.exe\""	Update.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\RemcosFocus-CD92GP = "\"C:\\ProgramData\\fsp\\Update.exe\""	Update.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	Update.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	Update.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4916	Update.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: 33	4968	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	4968	AUDIODG.EXE

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4916	Update.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
4916	Update.exe

Suspicious use of WriteProcessMemory 1 IoCs

description	pid	Process	procid_target
PID 5584 wrote to memory of 4916	5584	88vbet.exe	89

C:\Users\Admin\AppData\Local\Temp\88vbet.exe
"C:\Users\Admin\AppData\Local\Temp\88vbet.exe"
1⤵
- Adds policy Run key to start application
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:5584
- C:\ProgramData\fsp\Update.exe
  "C:\ProgramData\fsp\Update.exe"
  2⤵
  - Suricata alert: REMCOS RAT Malware Outbound C2 Communication
  - 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:4916

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x00000000000004D4 0x00000000000004D8
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4968

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

System Information Discovery

1

T1082

System Network Configuration Discovery

1

T1016

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

Update.exe

Path C:\ProgramData\fsp\Update.exe
Size 645KB
SHA256 7ea4571de61d421b79dd0cc3a117b1a36516a8cfc932d4673c9780e442f3184b
MD5 fd78a33c007b80d2826b77dca55182e0
SHA1 d1caf9c70ef24f7956cf8f4e3d18788892925e92
SHA512 04f2e5590bd8714d40777d3e54b43ddd40b677fc025e89ffec5c2b0196bbec4840245fbd9023beb00e9b59b4d21b519b0d810c4c7e124c1769a4fb2473918733
SSDEEP 12288:TIfxS5XkH4nOqwitNfuquCwgs69gy3V5v+BNyo3PoL5aDz:U5GXkH4nnwitNfuq9wgs3y3V5vgNyo3E
TLSH
T110E46D59A39402F8D0B7C135C982953BE7B2BC065571472F03D70E9B2F276A16F3AB26
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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