remcos | ed11a1720faafbb6e931be84e0159e6f57886ccc928e9c1bf007b4c6bf2c4d2b

Analysis

max time kernel
147s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
13-11-2024 01:55

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General

Target

OCBC.PaymentAdvice.pdf.exe
Size

25KB
MD5

3b545f7f4f5f5ae844a1743a51877f45
SHA1

5f423addc5664d4706a7bc1929e2f824848b12a6
SHA256

104b35f5d9c703f0c6b45ce79ec5c7023bf33681c303855ea03ceff56786dcef
SHA512

2b509774413dcb03fc83a82a20039d52f18b769ee83d21c7789628fe3967321479f6b6b11e5fb39740687d9763052188a0ced296679402d7e3f7dd4e449ac10e
SSDEEP

192:8/z/Yk+pxEnFgA/Wh764JziWHCEvNesGIN:q8vpxEnFgf76UvvNesJ

Score

10^/10

remcos remotehost collection discovery rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

204.10.160.239:9682

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
Rmc-6D4L9S
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
Remcos family
remcos

Suspicious use of NtCreateUserProcessOtherParentProcess 1 IoCs

Processes:

OCBC.PaymentAdvice.pdf.exe

description	pid	Process	procid_target
PID 3204 created 3432	3204	OCBC.PaymentAdvice.pdf.exe	56

Detected Nirsoft tools 4 IoCs

Free utilities often used by attackers which can steal passwords, product keys, etc.

Processes:

resource	yara_rule
behavioral2/memory/1116-1120-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/4996-1119-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/2532-1118-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft
behavioral2/memory/1116-1125-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

Processes:

resource	yara_rule
behavioral2/memory/2532-1118-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

Processes:

resource	yara_rule
behavioral2/memory/1116-1120-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/1116-1125-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Drops startup file 1 IoCs

Processes:

OCBC.PaymentAdvice.pdf.exe

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Capacity.vbs	OCBC.PaymentAdvice.pdf.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

Processes:

OCBC.PaymentAdvice.pdf.exe

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	OCBC.PaymentAdvice.pdf.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

OCBC.PaymentAdvice.pdf.exeOCBC.PaymentAdvice.pdf.exe

description	pid	Process	procid_target
PID 3204 set thread context of 1112	3204	OCBC.PaymentAdvice.pdf.exe	94
PID 1112 set thread context of 1116	1112	OCBC.PaymentAdvice.pdf.exe	95
PID 1112 set thread context of 2532	1112	OCBC.PaymentAdvice.pdf.exe	96
PID 1112 set thread context of 4996	1112	OCBC.PaymentAdvice.pdf.exe	97

System Location Discovery: System Language Discovery 1 TTPs 5 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

Processes:

OCBC.PaymentAdvice.pdf.exeOCBC.PaymentAdvice.pdf.exeOCBC.PaymentAdvice.pdf.exeOCBC.PaymentAdvice.pdf.exeOCBC.PaymentAdvice.pdf.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	OCBC.PaymentAdvice.pdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	OCBC.PaymentAdvice.pdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	OCBC.PaymentAdvice.pdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	OCBC.PaymentAdvice.pdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	OCBC.PaymentAdvice.pdf.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

Processes:

OCBC.PaymentAdvice.pdf.exeOCBC.PaymentAdvice.pdf.exeOCBC.PaymentAdvice.pdf.exe

pid	Process
3204	OCBC.PaymentAdvice.pdf.exe
4996	OCBC.PaymentAdvice.pdf.exe
4996	OCBC.PaymentAdvice.pdf.exe
1116	OCBC.PaymentAdvice.pdf.exe
1116	OCBC.PaymentAdvice.pdf.exe
1116	OCBC.PaymentAdvice.pdf.exe
1116	OCBC.PaymentAdvice.pdf.exe

Suspicious behavior: MapViewOfSection 3 IoCs

Processes:

OCBC.PaymentAdvice.pdf.exe

pid	Process
1112	OCBC.PaymentAdvice.pdf.exe
1112	OCBC.PaymentAdvice.pdf.exe
1112	OCBC.PaymentAdvice.pdf.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

OCBC.PaymentAdvice.pdf.exeOCBC.PaymentAdvice.pdf.exe

description	pid	Process
Token: SeDebugPrivilege	3204	OCBC.PaymentAdvice.pdf.exe
Token: SeDebugPrivilege	3204	OCBC.PaymentAdvice.pdf.exe
Token: SeDebugPrivilege	4996	OCBC.PaymentAdvice.pdf.exe

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

OCBC.PaymentAdvice.pdf.exeOCBC.PaymentAdvice.pdf.exe

description	pid	Process	procid_target
PID 3204 wrote to memory of 1112	3204	OCBC.PaymentAdvice.pdf.exe	94
PID 3204 wrote to memory of 1112	3204	OCBC.PaymentAdvice.pdf.exe	94
PID 3204 wrote to memory of 1112	3204	OCBC.PaymentAdvice.pdf.exe	94
PID 3204 wrote to memory of 1112	3204	OCBC.PaymentAdvice.pdf.exe	94
PID 3204 wrote to memory of 1112	3204	OCBC.PaymentAdvice.pdf.exe	94
PID 3204 wrote to memory of 1112	3204	OCBC.PaymentAdvice.pdf.exe	94
PID 3204 wrote to memory of 1112	3204	OCBC.PaymentAdvice.pdf.exe	94
PID 3204 wrote to memory of 1112	3204	OCBC.PaymentAdvice.pdf.exe	94
PID 3204 wrote to memory of 1112	3204	OCBC.PaymentAdvice.pdf.exe	94
PID 3204 wrote to memory of 1112	3204	OCBC.PaymentAdvice.pdf.exe	94
PID 3204 wrote to memory of 1112	3204	OCBC.PaymentAdvice.pdf.exe	94
PID 3204 wrote to memory of 1112	3204	OCBC.PaymentAdvice.pdf.exe	94
PID 1112 wrote to memory of 1116	1112	OCBC.PaymentAdvice.pdf.exe	95
PID 1112 wrote to memory of 1116	1112	OCBC.PaymentAdvice.pdf.exe	95
PID 1112 wrote to memory of 1116	1112	OCBC.PaymentAdvice.pdf.exe	95
PID 1112 wrote to memory of 1116	1112	OCBC.PaymentAdvice.pdf.exe	95
PID 1112 wrote to memory of 2532	1112	OCBC.PaymentAdvice.pdf.exe	96
PID 1112 wrote to memory of 2532	1112	OCBC.PaymentAdvice.pdf.exe	96
PID 1112 wrote to memory of 2532	1112	OCBC.PaymentAdvice.pdf.exe	96
PID 1112 wrote to memory of 2532	1112	OCBC.PaymentAdvice.pdf.exe	96
PID 1112 wrote to memory of 4996	1112	OCBC.PaymentAdvice.pdf.exe	97
PID 1112 wrote to memory of 4996	1112	OCBC.PaymentAdvice.pdf.exe	97
PID 1112 wrote to memory of 4996	1112	OCBC.PaymentAdvice.pdf.exe	97
PID 1112 wrote to memory of 4996	1112	OCBC.PaymentAdvice.pdf.exe	97

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3432
- C:\Users\Admin\AppData\Local\Temp\OCBC.PaymentAdvice.pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\OCBC.PaymentAdvice.pdf.exe"
  2⤵
  - Suspicious use of NtCreateUserProcessOtherParentProcess
  - Drops startup file
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3204
- C:\Users\Admin\AppData\Local\Temp\OCBC.PaymentAdvice.pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\OCBC.PaymentAdvice.pdf.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:1112
- - C:\Users\Admin\AppData\Local\Temp\OCBC.PaymentAdvice.pdf.exe
    C:\Users\Admin\AppData\Local\Temp\OCBC.PaymentAdvice.pdf.exe /stext "C:\Users\Admin\AppData\Local\Temp\pruobhlqoqqucibatpzxsbfjti"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:1116
- - C:\Users\Admin\AppData\Local\Temp\OCBC.PaymentAdvice.pdf.exe
    C:\Users\Admin\AppData\Local\Temp\OCBC.PaymentAdvice.pdf.exe /stext "C:\Users\Admin\AppData\Local\Temp\rmzhbzwkcyiheoxecauydozacpjye"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:2532
- - C:\Users\Admin\AppData\Local\Temp\OCBC.PaymentAdvice.pdf.exe
    C:\Users\Admin\AppData\Local\Temp\OCBC.PaymentAdvice.pdf.exe /stext "C:\Users\Admin\AppData\Local\Temp\cgercsglqgampulqtlhagtujcdbhfvven"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4996

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\pruobhlqoqqucibatpzxsbfjti

Filesize
4KB

MD5
7aca43b2800ceb18b3ed2326532545de

SHA1
d4cf207ef85bd749d59c1cb27a09c167ee21523a

SHA256
3d9f8622d97587fd84d3d0560a50ab38e5f894fe4b5bcaa34279643fdaaeb480

SHA512
0e002e6b8d965c227d9b1aa7c0251619c787ec7717e59667e756e5815e3666a955ea397eb148a1ed6bb7d8045727e4efa656a103f14bc70a03b03f0c91283c2f

Download Submit
memory/1112-1098-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1112-1128-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1116-1120-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1116-1125-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2532-1118-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/3204-47-0x0000000006D00000-0x0000000006E1E000-memory.dmp

Filesize
1.1MB

Download
memory/3204-35-0x0000000006D00000-0x0000000006E1E000-memory.dmp

Filesize
1.1MB

Download
memory/3204-3-0x0000000006D00000-0x0000000006E24000-memory.dmp

Filesize
1.1MB

Download
memory/3204-4-0x0000000007400000-0x00000000079A4000-memory.dmp

Filesize
5.6MB

Download
memory/3204-5-0x0000000006F50000-0x0000000006FE2000-memory.dmp

Filesize
584KB

Download
memory/3204-13-0x0000000006D00000-0x0000000006E1E000-memory.dmp

Filesize
1.1MB

Download
memory/3204-17-0x0000000006D00000-0x0000000006E1E000-memory.dmp

Filesize
1.1MB

Download
memory/3204-21-0x0000000006D00000-0x0000000006E1E000-memory.dmp

Filesize
1.1MB

Download
memory/3204-29-0x0000000006D00000-0x0000000006E1E000-memory.dmp

Filesize
1.1MB

Download
memory/3204-51-0x0000000006D00000-0x0000000006E1E000-memory.dmp

Filesize
1.1MB

Download
memory/3204-65-0x0000000006D00000-0x0000000006E1E000-memory.dmp

Filesize
1.1MB

Download
memory/3204-69-0x0000000006D00000-0x0000000006E1E000-memory.dmp

Filesize
1.1MB

Download
memory/3204-67-0x0000000006D00000-0x0000000006E1E000-memory.dmp

Filesize
1.1MB

Download
memory/3204-63-0x0000000006D00000-0x0000000006E1E000-memory.dmp

Filesize
1.1MB

Download
memory/3204-61-0x0000000006D00000-0x0000000006E1E000-memory.dmp

Filesize
1.1MB

Download
memory/3204-59-0x0000000006D00000-0x0000000006E1E000-memory.dmp

Filesize
1.1MB

Download
memory/3204-57-0x0000000006D00000-0x0000000006E1E000-memory.dmp

Filesize
1.1MB

Download
memory/3204-55-0x0000000006D00000-0x0000000006E1E000-memory.dmp

Filesize
1.1MB

Download
memory/3204-53-0x0000000006D00000-0x0000000006E1E000-memory.dmp

Filesize
1.1MB

Download
memory/3204-49-0x0000000006D00000-0x0000000006E1E000-memory.dmp

Filesize
1.1MB

Download
memory/3204-1-0x0000000000BD0000-0x0000000000BDC000-memory.dmp

Filesize
48KB

Download
memory/3204-45-0x0000000006D00000-0x0000000006E1E000-memory.dmp

Filesize
1.1MB

Download
memory/3204-41-0x0000000006D00000-0x0000000006E1E000-memory.dmp

Filesize
1.1MB

Download
memory/3204-39-0x0000000006D00000-0x0000000006E1E000-memory.dmp

Filesize
1.1MB

Download
memory/3204-37-0x0000000006D00000-0x0000000006E1E000-memory.dmp

Filesize
1.1MB

Download
memory/3204-2-0x0000000074540000-0x0000000074CF0000-memory.dmp

Filesize
7.7MB

Download
memory/3204-33-0x0000000006D00000-0x0000000006E1E000-memory.dmp

Filesize
1.1MB

Download
memory/3204-31-0x0000000006D00000-0x0000000006E1E000-memory.dmp

Filesize
1.1MB

Download
memory/3204-27-0x0000000006D00000-0x0000000006E1E000-memory.dmp

Filesize
1.1MB

Download
memory/3204-43-0x0000000006D00000-0x0000000006E1E000-memory.dmp

Filesize
1.1MB

Download
memory/3204-25-0x0000000006D00000-0x0000000006E1E000-memory.dmp

Filesize
1.1MB

Download
memory/3204-23-0x0000000006D00000-0x0000000006E1E000-memory.dmp

Filesize
1.1MB

Download
memory/3204-19-0x0000000006D00000-0x0000000006E1E000-memory.dmp

Filesize
1.1MB

Download
memory/3204-15-0x0000000006D00000-0x0000000006E1E000-memory.dmp

Filesize
1.1MB

Download
memory/3204-11-0x0000000006D00000-0x0000000006E1E000-memory.dmp

Filesize
1.1MB

Download
memory/3204-9-0x0000000006D00000-0x0000000006E1E000-memory.dmp

Filesize
1.1MB

Download
memory/3204-7-0x0000000006D00000-0x0000000006E1E000-memory.dmp

Filesize
1.1MB

Download
memory/3204-6-0x0000000006D00000-0x0000000006E1E000-memory.dmp

Filesize
1.1MB

Download
memory/3204-1080-0x000000007454E000-0x000000007454F000-memory.dmp

Filesize
4KB

Download
memory/3204-1081-0x0000000074540000-0x0000000074CF0000-memory.dmp

Filesize
7.7MB

Download
memory/3204-1082-0x0000000007060000-0x00000000070F6000-memory.dmp

Filesize
600KB

Download
memory/3204-1083-0x0000000007140000-0x000000000718C000-memory.dmp

Filesize
304KB

Download
memory/3204-1087-0x0000000074540000-0x0000000074CF0000-memory.dmp

Filesize
7.7MB

Download
memory/3204-1088-0x0000000074540000-0x0000000074CF0000-memory.dmp

Filesize
7.7MB

Download
memory/3204-1089-0x0000000074540000-0x0000000074CF0000-memory.dmp

Filesize
7.7MB

Download
memory/3204-0-0x000000007454E000-0x000000007454F000-memory.dmp

Filesize
4KB

Download
memory/3204-1090-0x0000000007190000-0x00000000071E4000-memory.dmp

Filesize
336KB

Download
memory/3204-1099-0x0000000074540000-0x0000000074CF0000-memory.dmp

Filesize
7.7MB

Download
memory/4996-1119-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download