remcos | cb2b849e4d24527ba41c0e5ae3982ecde5bd91b94b5ae8bb27dc221b4c775891

Analysis

max time kernel
150s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
17-09-2024 15:07

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General

Target

DHL DOC 411744484099.exe
Size

863KB
MD5

17c6fe265edc0770cfdc81cd7b5645bc
SHA1

761409d5a10480a4fd897e37aa098ec333e96ab2
SHA256

cb2b849e4d24527ba41c0e5ae3982ecde5bd91b94b5ae8bb27dc221b4c775891
SHA512

6048186df40e5e653b051c8fa0071411a56ff48722340f95cfc84cfc4affda7ca6a75c65421795439433e5f566ed3469f160f2f2e156953a22b5f23ae13ced60
SSDEEP

24576:OLOmAJ1+95ZiMtkqM1pMky9raoPtXCuHYvN:OqmY1+95S1KkSrrRrHIN

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
4892	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-1-5-21-656926755-4116854191-210765258-1000\Control Panel\International\Geo\Nation	DHL DOC 411744484099.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4016 set thread context of 4696	4016	DHL DOC 411744484099.exe	96

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	DHL DOC 411744484099.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	DHL DOC 411744484099.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.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
2828	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4892	powershell.exe
4892	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4892	powershell.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 4016 wrote to memory of 4892	4016	DHL DOC 411744484099.exe	92
PID 4016 wrote to memory of 4892	4016	DHL DOC 411744484099.exe	92
PID 4016 wrote to memory of 4892	4016	DHL DOC 411744484099.exe	92
PID 4016 wrote to memory of 2828	4016	DHL DOC 411744484099.exe	94
PID 4016 wrote to memory of 2828	4016	DHL DOC 411744484099.exe	94
PID 4016 wrote to memory of 2828	4016	DHL DOC 411744484099.exe	94
PID 4016 wrote to memory of 4696	4016	DHL DOC 411744484099.exe	96
PID 4016 wrote to memory of 4696	4016	DHL DOC 411744484099.exe	96
PID 4016 wrote to memory of 4696	4016	DHL DOC 411744484099.exe	96
PID 4016 wrote to memory of 4696	4016	DHL DOC 411744484099.exe	96
PID 4016 wrote to memory of 4696	4016	DHL DOC 411744484099.exe	96
PID 4016 wrote to memory of 4696	4016	DHL DOC 411744484099.exe	96
PID 4016 wrote to memory of 4696	4016	DHL DOC 411744484099.exe	96
PID 4016 wrote to memory of 4696	4016	DHL DOC 411744484099.exe	96
PID 4016 wrote to memory of 4696	4016	DHL DOC 411744484099.exe	96
PID 4016 wrote to memory of 4696	4016	DHL DOC 411744484099.exe	96
PID 4016 wrote to memory of 4696	4016	DHL DOC 411744484099.exe	96
PID 4016 wrote to memory of 4696	4016	DHL DOC 411744484099.exe	96

C:\Users\Admin\AppData\Local\Temp\DHL DOC 411744484099.exe
"C:\Users\Admin\AppData\Local\Temp\DHL DOC 411744484099.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4016
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\bUwNWDK.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4892
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\bUwNWDK" /XML "C:\Users\Admin\AppData\Local\Temp\tmpEE09.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2828
- C:\Users\Admin\AppData\Local\Temp\DHL DOC 411744484099.exe
  "C:\Users\Admin\AppData\Local\Temp\DHL DOC 411744484099.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4696

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_13q1duyy.030.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpEE09.tmp

Filesize
1KB

MD5
a961514e83e1f6cbe8790a901d508422

SHA1
f90939b23cf0cdf49b97e65e1658bc085ef7db55

SHA256
fb79d73d88d7de7eb2dae2a0e874638da8621e16b634b1576c81886c0b4e5226

SHA512
472ba099004f3eb6bee7ebf1fcd258c98a3636a8556350a269cdd9dce0d42219bd9f3ce7e5c139047d0717ebccb3bbfbd44f2f94150ee44e1e8596d87f7abfa6

Download Submit
memory/4016-0-0x0000000074FBE000-0x0000000074FBF000-memory.dmp

Filesize
4KB

Download
memory/4016-1-0x0000000000F00000-0x0000000000FDE000-memory.dmp

Filesize
888KB

Download
memory/4016-2-0x0000000005ED0000-0x0000000006474000-memory.dmp

Filesize
5.6MB

Download
memory/4016-3-0x00000000059C0000-0x0000000005A52000-memory.dmp

Filesize
584KB

Download
memory/4016-4-0x0000000074FB0000-0x0000000075760000-memory.dmp

Filesize
7.7MB

Download
memory/4016-5-0x0000000005990000-0x000000000599A000-memory.dmp

Filesize
40KB

Download
memory/4016-6-0x00000000072F0000-0x00000000073C2000-memory.dmp

Filesize
840KB

Download
memory/4016-7-0x0000000005C40000-0x0000000005C4E000-memory.dmp

Filesize
56KB

Download
memory/4016-8-0x0000000074FBE000-0x0000000074FBF000-memory.dmp

Filesize
4KB

Download
memory/4016-9-0x0000000074FB0000-0x0000000075760000-memory.dmp

Filesize
7.7MB

Download
memory/4016-10-0x0000000007850000-0x000000000790E000-memory.dmp

Filesize
760KB

Download
memory/4016-11-0x0000000009E90000-0x0000000009F2C000-memory.dmp

Filesize
624KB

Download
memory/4016-41-0x0000000074FB0000-0x0000000075760000-memory.dmp

Filesize
7.7MB

Download
memory/4696-35-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4696-30-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4696-81-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4696-82-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4696-80-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4696-79-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4696-77-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4696-33-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4696-32-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4696-46-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4696-78-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4696-75-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4696-76-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4696-29-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4696-74-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4696-48-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4696-44-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4696-45-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4892-43-0x00000000065B0000-0x00000000065FC000-memory.dmp

Filesize
304KB

Download
memory/4892-20-0x0000000005670000-0x0000000005692000-memory.dmp

Filesize
136KB

Download
memory/4892-49-0x0000000006AE0000-0x0000000006B12000-memory.dmp

Filesize
200KB

Download
memory/4892-50-0x000000006FAC0000-0x000000006FB0C000-memory.dmp

Filesize
304KB

Download
memory/4892-60-0x0000000006AC0000-0x0000000006ADE000-memory.dmp

Filesize
120KB

Download
memory/4892-61-0x0000000007500000-0x00000000075A3000-memory.dmp

Filesize
652KB

Download
memory/4892-62-0x0000000007E90000-0x000000000850A000-memory.dmp

Filesize
6.5MB

Download
memory/4892-63-0x0000000007840000-0x000000000785A000-memory.dmp

Filesize
104KB

Download
memory/4892-64-0x00000000078C0000-0x00000000078CA000-memory.dmp

Filesize
40KB

Download
memory/4892-65-0x0000000007AC0000-0x0000000007B56000-memory.dmp

Filesize
600KB

Download
memory/4892-66-0x0000000007A40000-0x0000000007A51000-memory.dmp

Filesize
68KB

Download
memory/4892-67-0x0000000007A70000-0x0000000007A7E000-memory.dmp

Filesize
56KB

Download
memory/4892-68-0x0000000007A80000-0x0000000007A94000-memory.dmp

Filesize
80KB

Download
memory/4892-69-0x0000000007B80000-0x0000000007B9A000-memory.dmp

Filesize
104KB

Download
memory/4892-70-0x0000000007B60000-0x0000000007B68000-memory.dmp

Filesize
32KB

Download
memory/4892-73-0x0000000074FB0000-0x0000000075760000-memory.dmp

Filesize
7.7MB

Download
memory/4892-21-0x0000000005E40000-0x0000000005EA6000-memory.dmp

Filesize
408KB

Download
memory/4892-22-0x0000000005EB0000-0x0000000005F16000-memory.dmp

Filesize
408KB

Download
memory/4892-42-0x0000000006520000-0x000000000653E000-memory.dmp

Filesize
120KB

Download
memory/4892-25-0x0000000074FB0000-0x0000000075760000-memory.dmp

Filesize
7.7MB

Download
memory/4892-34-0x0000000005F20000-0x0000000006274000-memory.dmp

Filesize
3.3MB

Download
memory/4892-36-0x0000000074FB0000-0x0000000075760000-memory.dmp

Filesize
7.7MB

Download
memory/4892-17-0x0000000074FB0000-0x0000000075760000-memory.dmp

Filesize
7.7MB

Download
memory/4892-18-0x00000000056A0000-0x0000000005CC8000-memory.dmp

Filesize
6.2MB

Download
memory/4892-16-0x0000000002C10000-0x0000000002C46000-memory.dmp

Filesize
216KB

Download