remcos | cb2b849e4d24527ba41c0e5ae3982ecde5bd91b94b5ae8bb27dc221b4c775891

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

C2

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
2200	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2904 set thread context of 2820	2904	DHL DOC 411744484099.exe	33

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	DHL DOC 411744484099.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	DHL DOC 411744484099.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
2232	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2200	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2200	powershell.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2904 wrote to memory of 2200	2904	DHL DOC 411744484099.exe	29
PID 2904 wrote to memory of 2200	2904	DHL DOC 411744484099.exe	29
PID 2904 wrote to memory of 2200	2904	DHL DOC 411744484099.exe	29
PID 2904 wrote to memory of 2200	2904	DHL DOC 411744484099.exe	29
PID 2904 wrote to memory of 2232	2904	DHL DOC 411744484099.exe	30
PID 2904 wrote to memory of 2232	2904	DHL DOC 411744484099.exe	30
PID 2904 wrote to memory of 2232	2904	DHL DOC 411744484099.exe	30
PID 2904 wrote to memory of 2232	2904	DHL DOC 411744484099.exe	30
PID 2904 wrote to memory of 2820	2904	DHL DOC 411744484099.exe	33
PID 2904 wrote to memory of 2820	2904	DHL DOC 411744484099.exe	33
PID 2904 wrote to memory of 2820	2904	DHL DOC 411744484099.exe	33
PID 2904 wrote to memory of 2820	2904	DHL DOC 411744484099.exe	33
PID 2904 wrote to memory of 2820	2904	DHL DOC 411744484099.exe	33
PID 2904 wrote to memory of 2820	2904	DHL DOC 411744484099.exe	33
PID 2904 wrote to memory of 2820	2904	DHL DOC 411744484099.exe	33
PID 2904 wrote to memory of 2820	2904	DHL DOC 411744484099.exe	33
PID 2904 wrote to memory of 2820	2904	DHL DOC 411744484099.exe	33
PID 2904 wrote to memory of 2820	2904	DHL DOC 411744484099.exe	33
PID 2904 wrote to memory of 2820	2904	DHL DOC 411744484099.exe	33
PID 2904 wrote to memory of 2820	2904	DHL DOC 411744484099.exe	33
PID 2904 wrote to memory of 2820	2904	DHL DOC 411744484099.exe	33

C:\Users\Admin\AppData\Local\Temp\DHL DOC 411744484099.exe
"C:\Users\Admin\AppData\Local\Temp\DHL DOC 411744484099.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2904
- 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:2200
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\bUwNWDK" /XML "C:\Users\Admin\AppData\Local\Temp\tmpC1C9.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2232
- 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:2820

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpC1C9.tmp

Filesize
1KB

MD5
8781535821f89cc28b7c4c55f2ff3922

SHA1
31d9baa15f4e24f7386be487cc05166cde92700d

SHA256
0f328f1f84a7e8e29bb3931341cf3d49b72b23bd19333ac8dcd0f28043e1bd6a

SHA512
89e5331f83b9a70fe43dae1fb9af36bbbb236f656d79a36f118db129f72fd7be7286816dd46ea13c49100628aa489a5b6e42ae0446d847357719ab7fde261ca1

Download Submit
memory/2820-25-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2820-41-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2820-48-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2820-49-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2820-23-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2820-46-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2820-47-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2820-45-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2820-13-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2820-19-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2820-34-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2820-33-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2820-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2820-29-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2820-27-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2820-44-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2820-43-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2820-42-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2820-30-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2820-21-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2820-17-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2820-15-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2820-37-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2820-38-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2820-39-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2904-2-0x0000000074720000-0x0000000074E0E000-memory.dmp

Filesize
6.9MB

Download
memory/2904-1-0x0000000000F30000-0x000000000100E000-memory.dmp

Filesize
888KB

Download
memory/2904-5-0x000000007472E000-0x000000007472F000-memory.dmp

Filesize
4KB

Download
memory/2904-0-0x000000007472E000-0x000000007472F000-memory.dmp

Filesize
4KB

Download
memory/2904-32-0x0000000074720000-0x0000000074E0E000-memory.dmp

Filesize
6.9MB

Download
memory/2904-7-0x0000000005480000-0x000000000553E000-memory.dmp

Filesize
760KB

Download
memory/2904-6-0x0000000074720000-0x0000000074E0E000-memory.dmp

Filesize
6.9MB

Download
memory/2904-4-0x0000000000390000-0x000000000039E000-memory.dmp

Filesize
56KB

Download
memory/2904-3-0x0000000004FD0000-0x00000000050A2000-memory.dmp

Filesize
840KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads