remcos | fab90508b4e243e001e49c7b92235872a56866ecea6e8a9021dcbdd7c05fe841

Analysis

max time kernel
58s
max time network
61s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
26/10/2026, 20:36

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General

Target
fab90508b4e243e001e49c7b92235872a56866ecea6e8a9021dcbdd7c05fe841.exe
Size 645KB
Sample261026-zdrfeaht2q
SHA256 fab90508b4e243e001e49c7b92235872a56866ecea6e8a9021dcbdd7c05fe841
MD5 03d8da5de82a4d13ea08f268545ff595
SHA1 70a10b2e6a6e0241ee381a567b28521eb70c7b21
SHA512 44ab310e9530a0cb940cdb1111df37f2ad80e32c35769ce84fc3c8b88ad55fd0fac620c289da00393fe29608472c7fd1a71a285ac58af285bc2fdca4b8691430
SSDEEP 12288:jIfxS5XkH4nOqwitNfuquCwgs69gy3V5v+BNyo3PoL5aDz:E5GXkH4nnwitNfuq9wgs3y3V5vgNyo3E
TLSH
T1F1E46D59A39402F8D0B7C135C982953BE7B2BC065571472F03D70E9B2F276A16F3AB26
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

beyeugroup discovery remcos persistence rat suricata

Malware Config

Extracted

Family

remcos

Version

7.3.1 Pro

Botnet

BeYeuGroup

redmob.cc:8080
qq88.fan:8080
luck80.net:8080
add.hk.com:8080
8kbetn.net:8080
8kbett.shop:8080
8kbett.icu:8080
8kbett.one:8080
qh88.casino:8080
8kbet.hk.com:8080
qq88.studio:8080
backdoor.redmob.cc:8080
backdoor.qq88.studio:8080
backdoor.qh88.casino:8080
backdoor.w88vt.com:8080
backdoor.qq88.fan:8080

Attributes

audio_folder
MicRecords
audio_path
ApplicationPath
audio_record_time
5
connect_delay
0AssignedName=tele@VietNamReport
connect_interval
5
copy_file
Updater.exe
copy_folder
byg
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-D3L9AX
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

Suricata alert: REMCOS RAT Malware Outbound C2 Communication 64 IoCs

Network activity triggered a Suricata alert

suricata remcos

flow	pid	Process
81	3364	Updater.exe
81	3364	Updater.exe
120	3364	Updater.exe
120	3364	Updater.exe
12	3364	Updater.exe
12	3364	Updater.exe
23	3364	Updater.exe
23	3364	Updater.exe
58	3364	Updater.exe
58	3364	Updater.exe
56	3364	Updater.exe
56	3364	Updater.exe
99	3364	Updater.exe
99	3364	Updater.exe
71	3364	Updater.exe
71	3364	Updater.exe
95	3364	Updater.exe
95	3364	Updater.exe
118	3364	Updater.exe
118	3364	Updater.exe
29	3364	Updater.exe
29	3364	Updater.exe
48	3364	Updater.exe
48	3364	Updater.exe
83	3364	Updater.exe
83	3364	Updater.exe
113	3364	Updater.exe
113	3364	Updater.exe
17	3364	Updater.exe
17	3364	Updater.exe
32	3364	Updater.exe
32	3364	Updater.exe
53	3364	Updater.exe
53	3364	Updater.exe
47	3364	Updater.exe
47	3364	Updater.exe
108	3364	Updater.exe
108	3364	Updater.exe
128	3364	Updater.exe
128	3364	Updater.exe
97	3364	Updater.exe
97	3364	Updater.exe
111	3364	Updater.exe
111	3364	Updater.exe
20	3364	Updater.exe
20	3364	Updater.exe
38	3364	Updater.exe
38	3364	Updater.exe
66	3364	Updater.exe
66	3364	Updater.exe
110	3364	Updater.exe
110	3364	Updater.exe
68	3364	Updater.exe
68	3364	Updater.exe
14	3364	Updater.exe
14	3364	Updater.exe
28	3364	Updater.exe
28	3364	Updater.exe
30	3364	Updater.exe
30	3364	Updater.exe
69	3364	Updater.exe
69	3364	Updater.exe
61	3364	Updater.exe
61	3364	Updater.exe

Executes dropped EXE 1 IoCs

pid	Process
3364	Updater.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\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-D3L9AX = "\"C:\\ProgramData\\byg\\Updater.exe\""	Updater.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1404337215-1550464601-2805570857-1000\Software\Microsoft\Windows\CurrentVersion\Run\Rmc-D3L9AX = "\"C:\\ProgramData\\byg\\Updater.exe\""	fab90508b4e243e001e49c7b92235872a56866ecea6e8a9021dcbdd7c05fe841.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-D3L9AX = "\"C:\\ProgramData\\byg\\Updater.exe\""	fab90508b4e243e001e49c7b92235872a56866ecea6e8a9021dcbdd7c05fe841.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1404337215-1550464601-2805570857-1000\Software\Microsoft\Windows\CurrentVersion\Run\Rmc-D3L9AX = "\"C:\\ProgramData\\byg\\Updater.exe\""	Updater.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	Updater.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	Updater.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3364	Updater.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: 33	4980	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	4980	AUDIODG.EXE

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
3364	Updater.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
3364	Updater.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3364	Updater.exe

Suspicious use of WriteProcessMemory 1 IoCs

description	pid	Process	procid_target
PID 4292 wrote to memory of 3364	4292	fab90508b4e243e001e49c7b92235872a56866ecea6e8a9021dcbdd7c05fe841.exe	88

C:\Users\Admin\AppData\Local\Temp\fab90508b4e243e001e49c7b92235872a56866ecea6e8a9021dcbdd7c05fe841.exe
"C:\Users\Admin\AppData\Local\Temp\fab90508b4e243e001e49c7b92235872a56866ecea6e8a9021dcbdd7c05fe841.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:4292
- C:\ProgramData\byg\Updater.exe
  "C:\ProgramData\byg\Updater.exe"
  2⤵
  - Suricata alert: REMCOS RAT Malware Outbound C2 Communication
  - 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
  - Suspicious use of SetWindowsHookEx
  PID:3364

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x00000000000004E4 0x00000000000004C0
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4980

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Network Configuration Discovery

T1016

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

Updater.exe

Path C:\ProgramData\byg\Updater.exe
Size 645KB
SHA256 fab90508b4e243e001e49c7b92235872a56866ecea6e8a9021dcbdd7c05fe841
MD5 03d8da5de82a4d13ea08f268545ff595
SHA1 70a10b2e6a6e0241ee381a567b28521eb70c7b21
SHA512 44ab310e9530a0cb940cdb1111df37f2ad80e32c35769ce84fc3c8b88ad55fd0fac620c289da00393fe29608472c7fd1a71a285ac58af285bc2fdca4b8691430
SSDEEP 12288:jIfxS5XkH4nOqwitNfuquCwgs69gy3V5v+BNyo3PoL5aDz:E5GXkH4nnwitNfuq9wgs3y3V5vgNyo3E
TLSH
T1F1E46D59A39402F8D0B7C135C982953BE7B2BC065571472F03D70E9B2F276A16F3AB26
MD5 SHA1 SHA512 SSDEEP TLSH

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logs.dat

Path C:\ProgramData\remcos\logs.dat
Size 214B
SHA256 98217b4ef6461eb8ba71370a9996089c5582ffc51416360a712c77b1e3768889
MD5 aded99b45dc4afaccf91d1da34f8cae7
SHA1 df5e31e84ab17330cf235d1cbef58be5cc78c501
SHA512 ae99e97f1baae35bbfbd4e26ddea1da57dd0cc09ad1014c08d738c258072fb03117c63adc59f9b0498be4bee154769492932851b82d81f9cb864130c96629846
TLSH
T183D0126F3FE51159BA32D09A90F784667A74FAA13038C80C15E1474D29F560072407E3
MD5 SHA1 SHA512 TLSH

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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