remcos | ac9083b61eef653d53bb8e035dd48619764d008a00de6ba6d7761c698c8d5c75

General

Target

file.ps1
Size

1.3MB
MD5

e9555cbf01abdf1bd646705c3997e13c
SHA1

9a664ea36508bd4158a26529e9401202ba2811e4
SHA256

ac9083b61eef653d53bb8e035dd48619764d008a00de6ba6d7761c698c8d5c75
SHA512

c30a862f78274cdfccbaf1d4e7b1586f48b046ce575964a220dc4b315099eb462b522c4d12c741c8cc22fb00e6ee3532fa8ae577e7fa914283c33ed49fb58c94
SSDEEP

24576:Kl9R3rpl+v5MhC1jaysc54+xFB+ltbpQFRbut:cKx4QFvFZ8

Score

10^/10

remcos servert discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

ServerT

C2

vtrow.ydns.eu:2404

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
conhost.exe
copy_folder
Microsoft
delete_file
false
hide_file
true
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-OYYBQ1
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Edge
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

Executes dropped EXE 1 IoCs

pid	Process
1592	eaOrhEPG.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1592 set thread context of 4624	1592	eaOrhEPG.exe	94

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2096	powershell.exe

System Location Discovery: System Language Discovery 1 TTPs 2 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	eaOrhEPG.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2096	powershell.exe
2096	powershell.exe
1592	eaOrhEPG.exe
1592	eaOrhEPG.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2096	powershell.exe
Token: SeDebugPrivilege	1592	eaOrhEPG.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4624	RegAsm.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2096 wrote to memory of 1592	2096	powershell.exe	92
PID 2096 wrote to memory of 1592	2096	powershell.exe	92
PID 2096 wrote to memory of 1592	2096	powershell.exe	92
PID 1592 wrote to memory of 3324	1592	eaOrhEPG.exe	93
PID 1592 wrote to memory of 3324	1592	eaOrhEPG.exe	93
PID 1592 wrote to memory of 3324	1592	eaOrhEPG.exe	93
PID 1592 wrote to memory of 4624	1592	eaOrhEPG.exe	94
PID 1592 wrote to memory of 4624	1592	eaOrhEPG.exe	94
PID 1592 wrote to memory of 4624	1592	eaOrhEPG.exe	94
PID 1592 wrote to memory of 4624	1592	eaOrhEPG.exe	94
PID 1592 wrote to memory of 4624	1592	eaOrhEPG.exe	94
PID 1592 wrote to memory of 4624	1592	eaOrhEPG.exe	94
PID 1592 wrote to memory of 4624	1592	eaOrhEPG.exe	94
PID 1592 wrote to memory of 4624	1592	eaOrhEPG.exe	94
PID 1592 wrote to memory of 4624	1592	eaOrhEPG.exe	94
PID 1592 wrote to memory of 4624	1592	eaOrhEPG.exe	94
PID 1592 wrote to memory of 4624	1592	eaOrhEPG.exe	94
PID 1592 wrote to memory of 4624	1592	eaOrhEPG.exe	94

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\file.ps1
1⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2096
- C:\Users\Admin\AppData\Local\Temp\eaOrhEPG.exe
  "C:\Users\Admin\AppData\Local\Temp\eaOrhEPG.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1592
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
    3⤵
    PID:3324
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:4624

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
fd7edbf8aa2ac6af4c32edc6e0999126

SHA1
602a513bdcae7ed80ed7c35be0e53abc0c4bd999

SHA256
a6089422cf46b6b5bda7a18a2130b683c4ecfe09581cfe93c810cb9c993428ee

SHA512
d591c3414440a8f5bd9c799260112c9de3a43876f3f5969bf897d521f3b1604e65ddb045c37fecbf0e72eea43e7f2329d8a785b573073b4c3b14f951847b13af

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ec0bzyqr.bus.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\eaOrhEPG.exe

Filesize
543KB

MD5
cae7aa28cb07f464a1dbf0a3a7963e2f

SHA1
16958b6d1a6588322c31d84acef102c6629761f2

SHA256
d7d7c68fb6494dab85333278223bfd42baa156485bb4bdd9889488d0ec54bb08

SHA512
78ed7def8162252499ab4707236af210a7bdd18ecd5d0d624880dc1831c2e7acee456cc303f72fd52c2343a84e5d792d50aaea2bca2e2736929b637c30209a2a

Download Submit
memory/1592-36-0x0000000074520000-0x0000000074CD0000-memory.dmp

Filesize
7.7MB

Download
memory/1592-28-0x00000000006C0000-0x0000000000750000-memory.dmp

Filesize
576KB

Download
memory/1592-30-0x0000000074520000-0x0000000074CD0000-memory.dmp

Filesize
7.7MB

Download
memory/1592-29-0x0000000004F20000-0x0000000004F26000-memory.dmp

Filesize
24KB

Download
memory/1592-27-0x000000007452E000-0x000000007452F000-memory.dmp

Filesize
4KB

Download
memory/2096-1-0x00000201D24A0000-0x00000201D24C2000-memory.dmp

Filesize
136KB

Download
memory/2096-0-0x00007FF869B23000-0x00007FF869B25000-memory.dmp

Filesize
8KB

Download
memory/2096-11-0x00007FF869B20000-0x00007FF86A5E1000-memory.dmp

Filesize
10.8MB

Download
memory/2096-12-0x00007FF869B20000-0x00007FF86A5E1000-memory.dmp

Filesize
10.8MB

Download
memory/2096-26-0x00007FF869B20000-0x00007FF86A5E1000-memory.dmp

Filesize
10.8MB

Download
memory/4624-44-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4624-45-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4624-40-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4624-41-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4624-42-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4624-43-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4624-33-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4624-34-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4624-50-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4624-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4624-56-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4624-57-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4624-66-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4624-67-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4624-76-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4624-77-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download

Analysis

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