remcos | 3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
10/03/2025, 12:09

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General

Target
3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003.exe
Size 1.1MB
Sample250310-pbj87stycy
SHA256 3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003
MD5 4e81c81c8ed02046d63589a6a109043d
SHA1 fbd003cdfb5156dcd47dbf0595efa37faaf05864
SHA512 51a1a0f2c627800d11a4070928b8a3231f29cae3c41345c96426c89035c7505936717270f02aa21b68a568b636443f6cf069b992b3e2665e2cabf36f25e11f1f
SSDEEP 24576:eQ/ye/6xgls5Uc491favXSzuVUB2n38AhTyoiw:eQ/P6ij1SfSzuR8AhNi
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos feb 19 discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

FEB 19

austin99.duckdns.org:9373
103.186.117.61:9373
sales778.bounceme.net:9373

Attributes

audio_folder
MicRecords
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-7BJJCC
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Remcos
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

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2160	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 300 set thread context of 1796	300	3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003.exe	35

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 4 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	3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003.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
796	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
300	3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003.exe
300	3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003.exe
2160	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	300	3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003.exe
Token: SeDebugPrivilege	2160	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1796	3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 300 wrote to memory of 2160	300	3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003.exe	31
PID 300 wrote to memory of 2160	300	3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003.exe	31
PID 300 wrote to memory of 2160	300	3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003.exe	31
PID 300 wrote to memory of 2160	300	3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003.exe	31
PID 300 wrote to memory of 796	300	3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003.exe	33
PID 300 wrote to memory of 796	300	3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003.exe	33
PID 300 wrote to memory of 796	300	3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003.exe	33
PID 300 wrote to memory of 796	300	3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003.exe	33
PID 300 wrote to memory of 1796	300	3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003.exe	35
PID 300 wrote to memory of 1796	300	3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003.exe	35
PID 300 wrote to memory of 1796	300	3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003.exe	35
PID 300 wrote to memory of 1796	300	3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003.exe	35
PID 300 wrote to memory of 1796	300	3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003.exe	35
PID 300 wrote to memory of 1796	300	3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003.exe	35
PID 300 wrote to memory of 1796	300	3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003.exe	35
PID 300 wrote to memory of 1796	300	3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003.exe	35
PID 300 wrote to memory of 1796	300	3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003.exe	35
PID 300 wrote to memory of 1796	300	3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003.exe	35
PID 300 wrote to memory of 1796	300	3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003.exe	35
PID 300 wrote to memory of 1796	300	3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003.exe	35
PID 300 wrote to memory of 1796	300	3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003.exe	35

C:\Users\Admin\AppData\Local\Temp\3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003.exe
"C:\Users\Admin\AppData\Local\Temp\3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:300
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\rDjjAiTe.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2160
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\rDjjAiTe" /XML "C:\Users\Admin\AppData\Local\Temp\tmpFF17.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:796
- C:\Users\Admin\AppData\Local\Temp\3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003.exe
  "C:\Users\Admin\AppData\Local\Temp\3799fefd99f0042be2e286b28b2902fd3a7ec31d812694ff7a96f266b11b8003.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:1796

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

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

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

logs.dat

Path C:\ProgramData\remcos\logs.dat
Size 144B
SHA256 7aeb0509debcb464f07b528c82b1e4709fbffa14efab75553945601f7f79652a
MD5 6615bd79aa3ca7452ec13c9591d3d2d4
SHA1 057f83feff00c30abadef07b58902a2094c1fb18
SHA512 765f0e365b28642f62304a3614b58be8b44b4e525660035fae5cfff29cf1b24dcc147498843a3b3e57fcf86d46466f50a02d141977c16a3388a68e832a02de6c
MD5 SHA1 SHA512

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tmpFF17.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmpFF17.tmp
Size 1KB
SHA256 7de7e4cc50062669254750d73b2a542e3c629083ca19f7cdfd9141e9e2335505
MD5 13014015109ae786dfe93ef18214a172
SHA1 ad19a5f75491430f157fc0ab46a02a130bd9d7d1
SHA512 bcb3d8223b47fb9e1195877257192569490210ed5e77956485cf9c5901b6c3f9094feae8c5d4f95e7dcb69e6f62464876aba30acb455b956d5f7900f43b116ca
MD5 SHA1 SHA512

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memory/300-37-0x0000000074AC0000-0x00000000751AE000-memory.dmp

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memory/300-1-0x0000000000B50000-0x0000000000C72000-memory.dmp

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memory/300-2-0x0000000074AC0000-0x00000000751AE000-memory.dmp

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memory/300-3-0x00000000005F0000-0x0000000000608000-memory.dmp

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memory/300-4-0x0000000074ACE000-0x0000000074ACF000-memory.dmp

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memory/300-5-0x0000000074AC0000-0x00000000751AE000-memory.dmp

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memory/300-6-0x0000000007DB0000-0x0000000007E70000-memory.dmp

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memory/300-0-0x0000000074ACE000-0x0000000074ACF000-memory.dmp

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memory/1796-14-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1796-24-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1796-13-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1796-22-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1796-36-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1796-19-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1796-33-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1796-32-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1796-31-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1796-30-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

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memory/1796-27-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1796-20-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1796-38-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1796-44-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1796-16-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1796-49-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1796-50-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1796-55-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1796-56-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1796-62-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1796-63-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1796-68-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1796-74-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1796-75-0x0000000000400000-0x000000000047F000-memory.dmp

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