remcos | c362c9041673c2475a3aecfa463941fde1935d452a5489a6f2a6a997053c92cf

Analysis

max time kernel
150s
max time network
149s
platform
windows7_x64
resource
win7-20240611-en
resource tags

arch:x64arch:x86image:win7-20240611-enlocale:en-usos:windows7-x64system
submitted
27-06-2024 17:11

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General

Target

JY-PCB-240109A-3.exe
Size

21KB
MD5

e05b80c579472d630f481820526c75f5
SHA1

7dca7c4bda5302e67ec87073b040ede2be781a6a
SHA256

2e410769ac9f0e71df08fda7115ccc473815a0f200a19059972d2c7b6190af4f
SHA512

c2b2e567713e3c712a6611a1255270e6695b26e136c80428860fe86a46e9eab5e589085c7bcc5213e0218a67e99949efaf5109fed2975668e8ecf87d11612feb
SSDEEP

384:ilFLVGZkhqIg8hR2GZsHEuymVr3JmJZzyF/O7v6qEfTivVqsSqncKxXFY:iTiYxBu93JmvyqEfuNqUcKxXFY

Score

10^/10

remcos remotehost agilenet collection persistence rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

45.133.116.123:63650

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-3BFGTU
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
NirSoft MailPassView 1 IoCs
Password recovery tool for various email clients

Processes:

resource yara_rule

behavioral1/memory/2916-41-0x0000000000400000-0x0000000000462000-memory.dmp MailPassView
NirSoft WebBrowserPassView 1 IoCs
Password recovery tool for various web browsers

Processes:

resource yara_rule

behavioral1/memory/2880-40-0x0000000000400000-0x0000000000478000-memory.dmp WebBrowserPassView

resource	yara_rule
behavioral1/memory/2916-41-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

resource	yara_rule
behavioral1/memory/2880-40-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Nirsoft 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2916-41-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/2880-40-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/1796-45-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft

Obfuscated with Agile.Net obfuscator 1 IoCs
Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.
agilenet

Processes:

resource yara_rule

behavioral1/memory/2108-3-0x0000000005760000-0x00000000057E2000-memory.dmp agile_net
Reads user/profile data of web browsers 2 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
Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
collection

Email Collection
T1114

Processes:

JY-PCB-240109A-3.exe

description ioc process

Key opened \REGISTRY\USER\S-1-5-21-2812790648-3157963462-487717889-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts JY-PCB-240109A-3.exe

resource	yara_rule
behavioral1/memory/2108-3-0x0000000005760000-0x00000000057E2000-memory.dmp	agile_net

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-2812790648-3157963462-487717889-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	JY-PCB-240109A-3.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

reg.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2812790648-3157963462-487717889-1000\Software\Microsoft\Windows\CurrentVersion\Run\JY-PCB-240109A-3 = "C:\\Users\\Admin\\Documents\\JY-PCB-240109A-3.pif"	reg.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

JY-PCB-240109A-3.exeJY-PCB-240109A-3.exe

description	pid	process	target process
PID 2108 set thread context of 2832	2108	JY-PCB-240109A-3.exe	JY-PCB-240109A-3.exe
PID 2832 set thread context of 2880	2832	JY-PCB-240109A-3.exe	JY-PCB-240109A-3.exe
PID 2832 set thread context of 2916	2832	JY-PCB-240109A-3.exe	JY-PCB-240109A-3.exe
PID 2832 set thread context of 1796	2832	JY-PCB-240109A-3.exe	JY-PCB-240109A-3.exe

Suspicious behavior: EnumeratesProcesses 28 IoCs

Processes:

JY-PCB-240109A-3.exeJY-PCB-240109A-3.exe

pid	process
2108	JY-PCB-240109A-3.exe
2108	JY-PCB-240109A-3.exe
2108	JY-PCB-240109A-3.exe
2108	JY-PCB-240109A-3.exe
2108	JY-PCB-240109A-3.exe
2108	JY-PCB-240109A-3.exe
2108	JY-PCB-240109A-3.exe
2108	JY-PCB-240109A-3.exe
2108	JY-PCB-240109A-3.exe
2108	JY-PCB-240109A-3.exe
2108	JY-PCB-240109A-3.exe
2108	JY-PCB-240109A-3.exe
2108	JY-PCB-240109A-3.exe
2108	JY-PCB-240109A-3.exe
2108	JY-PCB-240109A-3.exe
2108	JY-PCB-240109A-3.exe
2108	JY-PCB-240109A-3.exe
2108	JY-PCB-240109A-3.exe
2108	JY-PCB-240109A-3.exe
2108	JY-PCB-240109A-3.exe
2108	JY-PCB-240109A-3.exe
2108	JY-PCB-240109A-3.exe
2108	JY-PCB-240109A-3.exe
2108	JY-PCB-240109A-3.exe
2108	JY-PCB-240109A-3.exe
2108	JY-PCB-240109A-3.exe
2880	JY-PCB-240109A-3.exe
2880	JY-PCB-240109A-3.exe

Suspicious behavior: MapViewOfSection 3 IoCs

Processes:

JY-PCB-240109A-3.exe

pid process

2832 JY-PCB-240109A-3.exe
2832 JY-PCB-240109A-3.exe
2832 JY-PCB-240109A-3.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

JY-PCB-240109A-3.exeJY-PCB-240109A-3.exe

description pid process

Token: SeDebugPrivilege 2108 JY-PCB-240109A-3.exe
Token: SeDebugPrivilege 1796 JY-PCB-240109A-3.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

JY-PCB-240109A-3.exe

pid process

2832 JY-PCB-240109A-3.exe

pid	process
2832	JY-PCB-240109A-3.exe
2832	JY-PCB-240109A-3.exe
2832	JY-PCB-240109A-3.exe

description	pid	process
Token: SeDebugPrivilege	2108	JY-PCB-240109A-3.exe
Token: SeDebugPrivilege	1796	JY-PCB-240109A-3.exe

pid	process
2832	JY-PCB-240109A-3.exe

Suspicious use of WriteProcessMemory 40 IoCs

Processes:

JY-PCB-240109A-3.execmd.exeJY-PCB-240109A-3.exe

description	pid	process	target process
PID 2108 wrote to memory of 2776	2108	JY-PCB-240109A-3.exe	cmd.exe
PID 2108 wrote to memory of 2776	2108	JY-PCB-240109A-3.exe	cmd.exe
PID 2108 wrote to memory of 2776	2108	JY-PCB-240109A-3.exe	cmd.exe
PID 2108 wrote to memory of 2776	2108	JY-PCB-240109A-3.exe	cmd.exe
PID 2776 wrote to memory of 2812	2776	cmd.exe	reg.exe
PID 2776 wrote to memory of 2812	2776	cmd.exe	reg.exe
PID 2776 wrote to memory of 2812	2776	cmd.exe	reg.exe
PID 2776 wrote to memory of 2812	2776	cmd.exe	reg.exe
PID 2108 wrote to memory of 2560	2108	JY-PCB-240109A-3.exe	cmd.exe
PID 2108 wrote to memory of 2560	2108	JY-PCB-240109A-3.exe	cmd.exe
PID 2108 wrote to memory of 2560	2108	JY-PCB-240109A-3.exe	cmd.exe
PID 2108 wrote to memory of 2560	2108	JY-PCB-240109A-3.exe	cmd.exe
PID 2108 wrote to memory of 2832	2108	JY-PCB-240109A-3.exe	JY-PCB-240109A-3.exe
PID 2108 wrote to memory of 2832	2108	JY-PCB-240109A-3.exe	JY-PCB-240109A-3.exe
PID 2108 wrote to memory of 2832	2108	JY-PCB-240109A-3.exe	JY-PCB-240109A-3.exe
PID 2108 wrote to memory of 2832	2108	JY-PCB-240109A-3.exe	JY-PCB-240109A-3.exe
PID 2108 wrote to memory of 2832	2108	JY-PCB-240109A-3.exe	JY-PCB-240109A-3.exe
PID 2108 wrote to memory of 2832	2108	JY-PCB-240109A-3.exe	JY-PCB-240109A-3.exe
PID 2108 wrote to memory of 2832	2108	JY-PCB-240109A-3.exe	JY-PCB-240109A-3.exe
PID 2108 wrote to memory of 2832	2108	JY-PCB-240109A-3.exe	JY-PCB-240109A-3.exe
PID 2108 wrote to memory of 2832	2108	JY-PCB-240109A-3.exe	JY-PCB-240109A-3.exe
PID 2108 wrote to memory of 2832	2108	JY-PCB-240109A-3.exe	JY-PCB-240109A-3.exe
PID 2108 wrote to memory of 2832	2108	JY-PCB-240109A-3.exe	JY-PCB-240109A-3.exe
PID 2108 wrote to memory of 2832	2108	JY-PCB-240109A-3.exe	JY-PCB-240109A-3.exe
PID 2108 wrote to memory of 2832	2108	JY-PCB-240109A-3.exe	JY-PCB-240109A-3.exe
PID 2832 wrote to memory of 2880	2832	JY-PCB-240109A-3.exe	JY-PCB-240109A-3.exe
PID 2832 wrote to memory of 2880	2832	JY-PCB-240109A-3.exe	JY-PCB-240109A-3.exe
PID 2832 wrote to memory of 2880	2832	JY-PCB-240109A-3.exe	JY-PCB-240109A-3.exe
PID 2832 wrote to memory of 2880	2832	JY-PCB-240109A-3.exe	JY-PCB-240109A-3.exe
PID 2832 wrote to memory of 2880	2832	JY-PCB-240109A-3.exe	JY-PCB-240109A-3.exe
PID 2832 wrote to memory of 2916	2832	JY-PCB-240109A-3.exe	JY-PCB-240109A-3.exe
PID 2832 wrote to memory of 2916	2832	JY-PCB-240109A-3.exe	JY-PCB-240109A-3.exe
PID 2832 wrote to memory of 2916	2832	JY-PCB-240109A-3.exe	JY-PCB-240109A-3.exe
PID 2832 wrote to memory of 2916	2832	JY-PCB-240109A-3.exe	JY-PCB-240109A-3.exe
PID 2832 wrote to memory of 2916	2832	JY-PCB-240109A-3.exe	JY-PCB-240109A-3.exe
PID 2832 wrote to memory of 1796	2832	JY-PCB-240109A-3.exe	JY-PCB-240109A-3.exe
PID 2832 wrote to memory of 1796	2832	JY-PCB-240109A-3.exe	JY-PCB-240109A-3.exe
PID 2832 wrote to memory of 1796	2832	JY-PCB-240109A-3.exe	JY-PCB-240109A-3.exe
PID 2832 wrote to memory of 1796	2832	JY-PCB-240109A-3.exe	JY-PCB-240109A-3.exe
PID 2832 wrote to memory of 1796	2832	JY-PCB-240109A-3.exe	JY-PCB-240109A-3.exe

C:\Users\Admin\AppData\Local\Temp\JY-PCB-240109A-3.exe
"C:\Users\Admin\AppData\Local\Temp\JY-PCB-240109A-3.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2108

C:\Windows\SysWOW64\cmd.exe
cmd /c REG ADD "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /V "JY-PCB-240109A-3" /t REG_SZ /F /D "C:\Users\Admin\Documents\JY-PCB-240109A-3.pif"
2⤵
- Suspicious use of WriteProcessMemory
PID:2776

C:\Windows\SysWOW64\reg.exe
REG ADD "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /V "JY-PCB-240109A-3" /t REG_SZ /F /D "C:\Users\Admin\Documents\JY-PCB-240109A-3.pif"
3⤵
- Adds Run key to start application
PID:2812

C:\Windows\SysWOW64\cmd.exe
cmd /c Copy "C:\Users\Admin\AppData\Local\Temp\JY-PCB-240109A-3.exe" "C:\Users\Admin\Documents\JY-PCB-240109A-3.pif"
2⤵
PID:2560

C:\Users\Admin\AppData\Local\Temp\JY-PCB-240109A-3.exe
"C:\Users\Admin\AppData\Local\Temp\JY-PCB-240109A-3.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2832

C:\Users\Admin\AppData\Local\Temp\JY-PCB-240109A-3.exe
C:\Users\Admin\AppData\Local\Temp\JY-PCB-240109A-3.exe /stext "C:\Users\Admin\AppData\Local\Temp\xvugalxpa"
3⤵
- Suspicious behavior: EnumeratesProcesses
PID:2880

C:\Users\Admin\AppData\Local\Temp\JY-PCB-240109A-3.exe
C:\Users\Admin\AppData\Local\Temp\JY-PCB-240109A-3.exe /stext "C:\Users\Admin\AppData\Local\Temp\hxzzbdirokxe"
3⤵
- Accesses Microsoft Outlook accounts
PID:2916

C:\Users\Admin\AppData\Local\Temp\JY-PCB-240109A-3.exe
C:\Users\Admin\AppData\Local\Temp\JY-PCB-240109A-3.exe /stext "C:\Users\Admin\AppData\Local\Temp\srescwtkcspjxnp"
3⤵
- Suspicious use of AdjustPrivilegeToken
PID:1796

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads

C:\ProgramData\remcos\logs.dat
Filesize
144B

MD5
f1c23c5f651866d03c6cf3eca7e90428

SHA1
ffad4cf1c6b4d3573e0c64744b1166058340c80d

SHA256
0ba73684cfce666a3fa7315938e75ef879e0b97ca28aea90663e99167fc2c8f0

SHA512
6d3024d32767932569265c48a818631c1f049bae3b6eb1a280f54fcdc3acb2a21e8091f19f746d3bbc93ced060c53083adbe0a90f238f8901bf93f4f1c8c6e5c

Download Submit
C:\Users\Admin\AppData\Local\Temp\xvugalxpa
Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
memory/1796-43-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1796-45-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1796-44-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2108-0-0x000000007498E000-0x000000007498F000-memory.dmp

Filesize
4KB

Download
memory/2108-1-0x0000000001260000-0x000000000126A000-memory.dmp

Filesize
40KB

Download
memory/2108-2-0x0000000074980000-0x000000007506E000-memory.dmp

Filesize
6.9MB

Download
memory/2108-3-0x0000000005760000-0x00000000057E2000-memory.dmp

Filesize
520KB

Download
memory/2108-23-0x0000000074980000-0x000000007506E000-memory.dmp

Filesize
6.9MB

Download
memory/2832-30-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2832-6-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2832-18-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2832-16-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/2832-15-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2832-14-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2832-11-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2832-8-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2832-21-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2832-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2832-27-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2832-26-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2832-28-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2832-29-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2832-10-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2832-32-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2832-33-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2832-93-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2832-92-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2832-84-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2832-13-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2832-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2832-52-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2832-56-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2832-55-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2832-57-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2832-59-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2832-60-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2832-63-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2832-12-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2832-68-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2832-69-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2832-77-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2832-76-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2832-85-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2880-38-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2880-40-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2880-35-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2916-37-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2916-41-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2916-39-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download