remcos | 812e1927550e39501b2477df2479dc239b428d11bbae81e719c220769ccd7b34

Analysis

max time kernel
149s
max time network
122s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
12-12-2024 15:47

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General

Target

812e1927550e39501b2477df2479dc239b428d11bbae81e719c220769ccd7b34.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
2516	svchost.exe

System Location Discovery: System Language Discovery 1 TTPs 1 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

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
2788	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe
2300	rundll32.exe

Suspicious behavior: LoadsDriver 2 IoCs

pid	Process
476	Process not Found
476	Process not Found

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2300 wrote to memory of 3036	2300	rundll32.exe	30
PID 2300 wrote to memory of 3036	2300	rundll32.exe	30
PID 2300 wrote to memory of 3036	2300	rundll32.exe	30
PID 3036 wrote to memory of 2788	3036	cmd.exe	32
PID 3036 wrote to memory of 2788	3036	cmd.exe	32
PID 3036 wrote to memory of 2788	3036	cmd.exe	32
PID 2300 wrote to memory of 2516	2300	rundll32.exe	33
PID 2300 wrote to memory of 2516	2300	rundll32.exe	33
PID 2300 wrote to memory of 2516	2300	rundll32.exe	33
PID 2300 wrote to memory of 2516	2300	rundll32.exe	33

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\812e1927550e39501b2477df2479dc239b428d11bbae81e719c220769ccd7b34.dll,#1
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2300
- 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:3036
- - 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:2788
- 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
  PID:2516

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 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\svchost.exe

Filesize
481KB

MD5
1b092f1dca5c6155e160c454446926cf

SHA1
e27464092f4ae4b9116fcccd00e43eb631719e85

SHA256
47d0885bbcbb363ded1b6cf13099e201e53e2cd8ab877692ff2df93c3a320b96

SHA512
272b0db029f8aac92695491254307db0bb3d1f950496d3ee968a9e177b04d151c8acb95be8b942ead6624935a46091c948ce04592fe6b12dfe12fd4104d25682

Download Submit
memory/2300-0-0x0000000002360000-0x00000000027A9000-memory.dmp

Filesize
4.3MB

Download
memory/2300-20-0x000000006D080000-0x000000006D595000-memory.dmp

Filesize
5.1MB

Download