remcos | b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
16-09-2024 09:06

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General

Target

b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e.exe
Size

863KB
MD5

1c2a46d46812b1424ad44ac59b4c8d9a
SHA1

ad2822fc0804fad19c1d959f02c0011d80a7ab4c
SHA256

b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e
SHA512

0e3107208813adb9ca79720bea24dcc333bff9c7bc084b31a7abc92ecb1d09ed7deffe9014d0b85f4154aad6499d626eec85e0f43c570954afd437151219bc39
SSDEEP

24576:D1YaXjYr93cjbHRtEmWHs7FK5WQSDndP:D13MrhcjbHRWmh7c5MDdP

Score

10^/10

remcos 3456789 discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

3456789

172.93.220.148:45682

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
765-8M14I5
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

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
960	powershell.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-523280732-2327480845-3730041215-1000\Control Panel\International\Geo\Nation	b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4788 set thread context of 3232	4788	b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e.exe	93

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	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e.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
216	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
960	powershell.exe
960	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	960	powershell.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 4788 wrote to memory of 960	4788	b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e.exe	89
PID 4788 wrote to memory of 960	4788	b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e.exe	89
PID 4788 wrote to memory of 960	4788	b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e.exe	89
PID 4788 wrote to memory of 216	4788	b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e.exe	91
PID 4788 wrote to memory of 216	4788	b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e.exe	91
PID 4788 wrote to memory of 216	4788	b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e.exe	91
PID 4788 wrote to memory of 3232	4788	b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e.exe	93
PID 4788 wrote to memory of 3232	4788	b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e.exe	93
PID 4788 wrote to memory of 3232	4788	b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e.exe	93
PID 4788 wrote to memory of 3232	4788	b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e.exe	93
PID 4788 wrote to memory of 3232	4788	b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e.exe	93
PID 4788 wrote to memory of 3232	4788	b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e.exe	93
PID 4788 wrote to memory of 3232	4788	b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e.exe	93
PID 4788 wrote to memory of 3232	4788	b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e.exe	93
PID 4788 wrote to memory of 3232	4788	b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e.exe	93
PID 4788 wrote to memory of 3232	4788	b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e.exe	93
PID 4788 wrote to memory of 3232	4788	b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e.exe	93
PID 4788 wrote to memory of 3232	4788	b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e.exe	93

C:\Users\Admin\AppData\Local\Temp\b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e.exe
"C:\Users\Admin\AppData\Local\Temp\b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4788
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\fBvNwiRO.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:960
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\fBvNwiRO" /XML "C:\Users\Admin\AppData\Local\Temp\tmpE772.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:216
- C:\Users\Admin\AppData\Local\Temp\b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e.exe
  "C:\Users\Admin\AppData\Local\Temp\b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3232

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

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_idgco255.fd4.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpE772.tmp

Filesize
1KB

MD5
3f3be0ce4f17b55e0dccf72f5bf154c8

SHA1
245ebdaaab6f17a6956bf873cf03d6313f3f998a

SHA256
fe64c159d152232caf294f7a145f07dc64aa7acfcbd108087ecee2b05c758be0

SHA512
766850a9a93c84332d5bfdecb2be41b35dfc7722493b84e3fb6b26077530a7d926fdc61bdc526c675c0346911b74221e0f2d468f3b2b527d5a6ae60e1ee7fbdb

Download Submit
memory/960-42-0x0000000005F00000-0x0000000005F1E000-memory.dmp

Filesize
120KB

Download
memory/960-67-0x0000000007470000-0x000000000747E000-memory.dmp

Filesize
56KB

Download
memory/960-43-0x0000000005F50000-0x0000000005F9C000-memory.dmp

Filesize
304KB

Download
memory/960-70-0x0000000007560000-0x0000000007568000-memory.dmp

Filesize
32KB

Download
memory/960-69-0x0000000007580000-0x000000000759A000-memory.dmp

Filesize
104KB

Download
memory/960-68-0x0000000007480000-0x0000000007494000-memory.dmp

Filesize
80KB

Download
memory/960-66-0x0000000007440000-0x0000000007451000-memory.dmp

Filesize
68KB

Download
memory/960-65-0x00000000074C0000-0x0000000007556000-memory.dmp

Filesize
600KB

Download
memory/960-64-0x00000000072B0000-0x00000000072BA000-memory.dmp

Filesize
40KB

Download
memory/960-15-0x0000000004960000-0x0000000004996000-memory.dmp

Filesize
216KB

Download
memory/960-63-0x0000000007240000-0x000000000725A000-memory.dmp

Filesize
104KB

Download
memory/960-16-0x0000000075340000-0x0000000075AF0000-memory.dmp

Filesize
7.7MB

Download
memory/960-62-0x0000000007880000-0x0000000007EFA000-memory.dmp

Filesize
6.5MB

Download
memory/960-19-0x0000000075340000-0x0000000075AF0000-memory.dmp

Filesize
7.7MB

Download
memory/960-22-0x0000000075340000-0x0000000075AF0000-memory.dmp

Filesize
7.7MB

Download
memory/960-61-0x0000000006F00000-0x0000000006FA3000-memory.dmp

Filesize
652KB

Download
memory/960-60-0x0000000006ED0000-0x0000000006EEE000-memory.dmp

Filesize
120KB

Download
memory/960-50-0x0000000072290000-0x00000000722DC000-memory.dmp

Filesize
304KB

Download
memory/960-49-0x0000000006E90000-0x0000000006EC2000-memory.dmp

Filesize
200KB

Download
memory/960-73-0x0000000075340000-0x0000000075AF0000-memory.dmp

Filesize
7.7MB

Download
memory/960-18-0x00000000050B0000-0x00000000056D8000-memory.dmp

Filesize
6.2MB

Download
memory/960-36-0x00000000058F0000-0x0000000005956000-memory.dmp

Filesize
408KB

Download
memory/960-35-0x0000000005880000-0x00000000058E6000-memory.dmp

Filesize
408KB

Download
memory/960-41-0x0000000005A60000-0x0000000005DB4000-memory.dmp

Filesize
3.3MB

Download
memory/960-29-0x00000000057E0000-0x0000000005802000-memory.dmp

Filesize
136KB

Download
memory/3232-25-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3232-44-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3232-45-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3232-21-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3232-24-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3232-46-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3232-27-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3232-20-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3232-78-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3232-81-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3232-80-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3232-79-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3232-77-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3232-82-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3232-76-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3232-75-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3232-74-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4788-28-0x0000000075340000-0x0000000075AF0000-memory.dmp

Filesize
7.7MB

Download
memory/4788-5-0x0000000075340000-0x0000000075AF0000-memory.dmp

Filesize
7.7MB

Download
memory/4788-6-0x0000000005E60000-0x0000000005E6E000-memory.dmp

Filesize
56KB

Download
memory/4788-7-0x000000007534E000-0x000000007534F000-memory.dmp

Filesize
4KB

Download
memory/4788-3-0x0000000005970000-0x0000000005A02000-memory.dmp

Filesize
584KB

Download
memory/4788-4-0x0000000005950000-0x000000000595A000-memory.dmp

Filesize
40KB

Download
memory/4788-10-0x000000000AD90000-0x000000000AE2C000-memory.dmp

Filesize
624KB

Download
memory/4788-0-0x000000007534E000-0x000000007534F000-memory.dmp

Filesize
4KB

Download
memory/4788-2-0x0000000005E80000-0x0000000006424000-memory.dmp

Filesize
5.6MB

Download
memory/4788-1-0x0000000000E90000-0x0000000000F6C000-memory.dmp

Filesize
880KB

Download
memory/4788-8-0x0000000075340000-0x0000000075AF0000-memory.dmp

Filesize
7.7MB

Download
memory/4788-9-0x0000000008670000-0x000000000872E000-memory.dmp

Filesize
760KB

Download