remcos | 31febdf316e73eaa38c90143a5cd2351cdc4f4921ada4f6b053e5f9c2fa3d752

Analysis

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

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
02/09/2024, 11:32

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General

Target

2024082801362910.exe
Size

908KB
MD5

2fdf82bc3f069832d3599399c1387e07
SHA1

189ba992552eca7c89f430d084b3b29d3a4b18b8
SHA256

31febdf316e73eaa38c90143a5cd2351cdc4f4921ada4f6b053e5f9c2fa3d752
SHA512

1a80c9bd3837c2f565f243d7f0bb8395642013887c1710555f3f1cdb06fea846b92871beb4e3473cdb55e0912ae76301bfef2bf5f1384cac4d02df95276f0e10
SSDEEP

24576:qOGdumZu8lNib6eFUhmekfhv74ROOY3xxXBN2:qduh23eFUhm9j4EOIXv

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
1140	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	2024082801362910.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1512 set thread context of 3644	1512	2024082801362910.exe	98

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	2024082801362910.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	2024082801362910.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
3336	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1140	powershell.exe
1512	2024082801362910.exe
1512	2024082801362910.exe
1140	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1140	powershell.exe
Token: SeDebugPrivilege	1512	2024082801362910.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1512 wrote to memory of 1140	1512	2024082801362910.exe	93
PID 1512 wrote to memory of 1140	1512	2024082801362910.exe	93
PID 1512 wrote to memory of 1140	1512	2024082801362910.exe	93
PID 1512 wrote to memory of 3336	1512	2024082801362910.exe	95
PID 1512 wrote to memory of 3336	1512	2024082801362910.exe	95
PID 1512 wrote to memory of 3336	1512	2024082801362910.exe	95
PID 1512 wrote to memory of 4860	1512	2024082801362910.exe	97
PID 1512 wrote to memory of 4860	1512	2024082801362910.exe	97
PID 1512 wrote to memory of 4860	1512	2024082801362910.exe	97
PID 1512 wrote to memory of 3644	1512	2024082801362910.exe	98
PID 1512 wrote to memory of 3644	1512	2024082801362910.exe	98
PID 1512 wrote to memory of 3644	1512	2024082801362910.exe	98
PID 1512 wrote to memory of 3644	1512	2024082801362910.exe	98
PID 1512 wrote to memory of 3644	1512	2024082801362910.exe	98
PID 1512 wrote to memory of 3644	1512	2024082801362910.exe	98
PID 1512 wrote to memory of 3644	1512	2024082801362910.exe	98
PID 1512 wrote to memory of 3644	1512	2024082801362910.exe	98
PID 1512 wrote to memory of 3644	1512	2024082801362910.exe	98
PID 1512 wrote to memory of 3644	1512	2024082801362910.exe	98
PID 1512 wrote to memory of 3644	1512	2024082801362910.exe	98
PID 1512 wrote to memory of 3644	1512	2024082801362910.exe	98

C:\Users\Admin\AppData\Local\Temp\2024082801362910.exe
"C:\Users\Admin\AppData\Local\Temp\2024082801362910.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1512
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\OXwtFifCEW.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1140
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\OXwtFifCEW" /XML "C:\Users\Admin\AppData\Local\Temp\tmpC071.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:3336
- C:\Users\Admin\AppData\Local\Temp\2024082801362910.exe
  "C:\Users\Admin\AppData\Local\Temp\2024082801362910.exe"
  2⤵
  PID:4860
- C:\Users\Admin\AppData\Local\Temp\2024082801362910.exe
  "C:\Users\Admin\AppData\Local\Temp\2024082801362910.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3644

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_4eyywpva.40m.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpC071.tmp

Filesize
1KB

MD5
cb614a58d2e984768de3433189fb9646

SHA1
69aa8a7ad6550e63b08b5195ddcebac2b6961b57

SHA256
f54bbcfa8d3bd419dfb9bded3c40552a72bf4b57282f13317bb78fe38031e073

SHA512
d6772247c8cb8bba57e51047a3ba88522187f23deae997a324824aa31038bca9ce29c72ad3444939a88c55d2a32e1db80ce7a60e513b8af7b86941eb425c49c0

Download Submit
memory/1140-42-0x00000000063D0000-0x000000000641C000-memory.dmp

Filesize
304KB

Download
memory/1140-67-0x00000000078A0000-0x00000000078AE000-memory.dmp

Filesize
56KB

Download
memory/1140-73-0x0000000074DF0000-0x00000000755A0000-memory.dmp

Filesize
7.7MB

Download
memory/1140-70-0x0000000007990000-0x0000000007998000-memory.dmp

Filesize
32KB

Download
memory/1140-69-0x00000000079B0000-0x00000000079CA000-memory.dmp

Filesize
104KB

Download
memory/1140-68-0x00000000078B0000-0x00000000078C4000-memory.dmp

Filesize
80KB

Download
memory/1140-66-0x0000000007870000-0x0000000007881000-memory.dmp

Filesize
68KB

Download
memory/1140-65-0x00000000078F0000-0x0000000007986000-memory.dmp

Filesize
600KB

Download
memory/1140-64-0x00000000076E0000-0x00000000076EA000-memory.dmp

Filesize
40KB

Download
memory/1140-63-0x0000000007670000-0x000000000768A000-memory.dmp

Filesize
104KB

Download
memory/1140-16-0x0000000074DF0000-0x00000000755A0000-memory.dmp

Filesize
7.7MB

Download
memory/1140-17-0x0000000074DF0000-0x00000000755A0000-memory.dmp

Filesize
7.7MB

Download
memory/1140-62-0x0000000007CB0000-0x000000000832A000-memory.dmp

Filesize
6.5MB

Download
memory/1140-18-0x0000000005430000-0x0000000005A58000-memory.dmp

Filesize
6.2MB

Download
memory/1140-20-0x0000000074DF0000-0x00000000755A0000-memory.dmp

Filesize
7.7MB

Download
memory/1140-22-0x0000000005AD0000-0x0000000005B36000-memory.dmp

Filesize
408KB

Download
memory/1140-23-0x0000000005B40000-0x0000000005BA6000-memory.dmp

Filesize
408KB

Download
memory/1140-61-0x0000000007540000-0x00000000075E3000-memory.dmp

Filesize
652KB

Download
memory/1140-60-0x0000000007520000-0x000000000753E000-memory.dmp

Filesize
120KB

Download
memory/1140-36-0x0000000005D30000-0x0000000006084000-memory.dmp

Filesize
3.3MB

Download
memory/1140-50-0x000000006F860000-0x000000006F8AC000-memory.dmp

Filesize
304KB

Download
memory/1140-49-0x0000000006920000-0x0000000006952000-memory.dmp

Filesize
200KB

Download
memory/1140-15-0x0000000002A40000-0x0000000002A76000-memory.dmp

Filesize
216KB

Download
memory/1140-41-0x0000000006340000-0x000000000635E000-memory.dmp

Filesize
120KB

Download
memory/1140-21-0x00000000053A0000-0x00000000053C2000-memory.dmp

Filesize
136KB

Download
memory/1512-43-0x0000000074DF0000-0x00000000755A0000-memory.dmp

Filesize
7.7MB

Download
memory/1512-8-0x0000000074DF0000-0x00000000755A0000-memory.dmp

Filesize
7.7MB

Download
memory/1512-0-0x0000000074DFE000-0x0000000074DFF000-memory.dmp

Filesize
4KB

Download
memory/1512-9-0x0000000006510000-0x00000000065CE000-memory.dmp

Filesize
760KB

Download
memory/1512-5-0x0000000074DF0000-0x00000000755A0000-memory.dmp

Filesize
7.7MB

Download
memory/1512-6-0x00000000056D0000-0x00000000056E8000-memory.dmp

Filesize
96KB

Download
memory/1512-4-0x0000000005350000-0x000000000535A000-memory.dmp

Filesize
40KB

Download
memory/1512-7-0x0000000074DFE000-0x0000000074DFF000-memory.dmp

Filesize
4KB

Download
memory/1512-1-0x0000000000810000-0x00000000008F6000-memory.dmp

Filesize
920KB

Download
memory/1512-3-0x0000000005290000-0x0000000005322000-memory.dmp

Filesize
584KB

Download
memory/1512-2-0x0000000005760000-0x0000000005D04000-memory.dmp

Filesize
5.6MB

Download
memory/1512-10-0x00000000067B0000-0x000000000684C000-memory.dmp

Filesize
624KB

Download
memory/3644-25-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3644-74-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3644-24-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3644-35-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3644-26-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3644-46-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3644-44-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3644-45-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3644-27-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3644-76-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3644-75-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3644-77-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3644-78-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3644-79-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3644-80-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3644-81-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3644-82-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download