remcos | 2102db2d82f0f80f280e374cb3309221d6a81878929b504ca6c7045ec195d040

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
03-12-2024 21:23

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General

Target

DEMANDA LABORAL POR ABUSO DE CONFIANZA 01/WINMM.dll
Size

5.0MB
MD5

c1e4443c640d1dc0b408356a0ef216be
SHA1

9ca2853691bf347e12e620dadcf6ea1cceb817fe
SHA256

812e1927550e39501b2477df2479dc239b428d11bbae81e719c220769ccd7b34
SHA512

2d47e620c46634519a861b68ac779e22a910b1f3495d5fb8a3fbad43601bc430a13e538d571192c6aaae83fda2d0c1607901aa7a360bea18da732d1bf81b86c3
SSDEEP

98304:3yhaH4iFZp4lHd4iQfJuI5Tf4rYfthIfsuspcZpccVHu2S5nneBOc7uZ:3dH4i6l2wWFhnbi/HuveB

Score

10^/10

remcos gus discovery rat

Malware Config

Extracted

Family

remcos

Botnet

GUS

mastergusta.kozow.com:5151

Attributes

audio_folder
MicRecords
audio_path
ApplicationPath
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-6Q2P7E
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Signatures

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

Executes dropped EXE 1 IoCs

pid	Process
2164	svchost.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 2 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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2884	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe
2344	rundll32.exe

Suspicious behavior: LoadsDriver 2 IoCs

pid	Process
476	Process not Found
476	Process not Found

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2344 wrote to memory of 1536	2344	rundll32.exe	31
PID 2344 wrote to memory of 1536	2344	rundll32.exe	31
PID 2344 wrote to memory of 1536	2344	rundll32.exe	31
PID 1536 wrote to memory of 2884	1536	cmd.exe	33
PID 1536 wrote to memory of 2884	1536	cmd.exe	33
PID 1536 wrote to memory of 2884	1536	cmd.exe	33
PID 2344 wrote to memory of 2164	2344	rundll32.exe	34
PID 2344 wrote to memory of 2164	2344	rundll32.exe	34
PID 2344 wrote to memory of 2164	2344	rundll32.exe	34
PID 2344 wrote to memory of 2164	2344	rundll32.exe	34
PID 2164 wrote to memory of 2360	2164	svchost.exe	37
PID 2164 wrote to memory of 2360	2164	svchost.exe	37
PID 2164 wrote to memory of 2360	2164	svchost.exe	37
PID 2164 wrote to memory of 2360	2164	svchost.exe	37

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Windows\system32\rundll32.exe
rundll32.exe "C:\Users\Admin\AppData\Local\Temp\DEMANDA LABORAL POR ABUSO DE CONFIANZA 01\WINMM.dll",#1
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2344
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c schtasks /create /tn "8M2nd3VkhBIAnPBDO" /tr "C:\Users\Admin\AppData\Roaming\rundll32.exe" /sc onlogon /rl highest /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1536
- - C:\Windows\system32\schtasks.exe
    schtasks /create /tn "8M2nd3VkhBIAnPBDO" /tr "C:\Users\Admin\AppData\Roaming\rundll32.exe" /sc onlogon /rl highest /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2884
- C:\Users\Admin\AppData\Local\Temp\svchost.exe
  "C:\Users\Admin\AppData\Local\Temp\svchost.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2164
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\gnwpeafgbjcjxpvzmvkptifom.vbs"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2360

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\gnwpeafgbjcjxpvzmvkptifom.vbs

Filesize
500B

MD5
f1da013fa58295ac94372331e618f047

SHA1
b52f602bca7d2b9a04a55be4a1a4de857c98cbdb

SHA256
01df7d7ec8acb49f038a93cf1aeb9a79ddda138fa38992f477e6448689c09cd9

SHA512
fc1cfb5f09b5d96958d9387f582629e6691e996890ea345466fc47e214be074c9c625f3fb7f4e86d7e5b9864edcfe0d40031e6a0d6c496c5427d21bcffba26a8

Download Submit
C:\Users\Admin\AppData\Local\Temp\svchost.exe

Filesize
481KB

MD5
1b092f1dca5c6155e160c454446926cf

SHA1
e27464092f4ae4b9116fcccd00e43eb631719e85

SHA256
47d0885bbcbb363ded1b6cf13099e201e53e2cd8ab877692ff2df93c3a320b96

SHA512
272b0db029f8aac92695491254307db0bb3d1f950496d3ee968a9e177b04d151c8acb95be8b942ead6624935a46091c948ce04592fe6b12dfe12fd4104d25682

Download Submit
memory/2344-0-0x00000000024A0000-0x00000000028E9000-memory.dmp

Filesize
4.3MB

Download
memory/2344-21-0x000000006D080000-0x000000006D595000-memory.dmp

Filesize
5.1MB

Download