remcos | 88f2a0b582807e7cb8dce67a8bd81760c0f7f2e6329062c256cb7fe7ec7f3221

Analysis

max time kernel
150s
max time network
141s
platform
windows10-2004_x64
resource
win10v2004-en-20220113
submitted
23/03/2022, 14:02

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
Document.exe
Size 936KB
Sample220323-rb7evabfdm
SHA256 88f2a0b582807e7cb8dce67a8bd81760c0f7f2e6329062c256cb7fe7ec7f3221
MD5 20e3de152fb8e9faf83066ab40ade91e
SHA1 3b50c622371328e87ee02a955b70a62f192d6099
SHA512 4554a97d456bbbf94db8c2044d3c7d177052fe3558645004746a7ef8f61237ed013398ab6fb79c970db4abd631003121e3167543162fd0b5118102dbfdf218c6
MD5 SHA1 SHA512

Score

10^/10

remcos test collection persistence rat

Malware Config

Extracted

Family

remcos

Botnet

test

harveyautos110.ddns.net:2404
harveyautos111.hopto.org:2404
harveyautos112.ddns.net:2404
harvey205.camdvr.org:2404
harvey206.casacam.net:2404
harvey207.accesscam.org:2404

Attributes

audio_folder
MicRecords
audio_path
%AppData%
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
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
hhfkdhetdydgvchdxbkieyrygoiytir-O6GZAS
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
take_screenshot_title
wikipedia;solitaire;

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/1180-147-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView
behavioral2/memory/1180-148-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/4312-146-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/4312-151-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Nirsoft 6 IoCs

resource	yara_rule
behavioral2/memory/4312-146-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/1180-147-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft
behavioral2/memory/1180-148-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft
behavioral2/memory/4892-149-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4892-150-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4312-151-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	logagent.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Xfkbfbn = "C:\\Users\\Public\\nbfbkfX.url"	Document.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4884 set thread context of 4312	4884	logagent.exe	87
PID 4884 set thread context of 4892	4884	logagent.exe	88
PID 4884 set thread context of 1180	4884	logagent.exe	89

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4892	logagent.exe
4892	logagent.exe
4312	logagent.exe
4312	logagent.exe
4312	logagent.exe
4312	logagent.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4892	logagent.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2560 wrote to memory of 4884	2560	Document.exe	86
PID 2560 wrote to memory of 4884	2560	Document.exe	86
PID 2560 wrote to memory of 4884	2560	Document.exe	86
PID 2560 wrote to memory of 4884	2560	Document.exe	86
PID 2560 wrote to memory of 4884	2560	Document.exe	86
PID 2560 wrote to memory of 4884	2560	Document.exe	86
PID 2560 wrote to memory of 4884	2560	Document.exe	86
PID 2560 wrote to memory of 4884	2560	Document.exe	86
PID 2560 wrote to memory of 4884	2560	Document.exe	86
PID 2560 wrote to memory of 4884	2560	Document.exe	86
PID 2560 wrote to memory of 4884	2560	Document.exe	86
PID 2560 wrote to memory of 4884	2560	Document.exe	86
PID 2560 wrote to memory of 4884	2560	Document.exe	86
PID 2560 wrote to memory of 4884	2560	Document.exe	86
PID 2560 wrote to memory of 4884	2560	Document.exe	86
PID 4884 wrote to memory of 4312	4884	logagent.exe	87
PID 4884 wrote to memory of 4312	4884	logagent.exe	87
PID 4884 wrote to memory of 4312	4884	logagent.exe	87
PID 4884 wrote to memory of 4312	4884	logagent.exe	87
PID 4884 wrote to memory of 4312	4884	logagent.exe	87
PID 4884 wrote to memory of 4312	4884	logagent.exe	87
PID 4884 wrote to memory of 4312	4884	logagent.exe	87
PID 4884 wrote to memory of 4312	4884	logagent.exe	87
PID 4884 wrote to memory of 4892	4884	logagent.exe	88
PID 4884 wrote to memory of 4892	4884	logagent.exe	88
PID 4884 wrote to memory of 4892	4884	logagent.exe	88
PID 4884 wrote to memory of 4892	4884	logagent.exe	88
PID 4884 wrote to memory of 4892	4884	logagent.exe	88
PID 4884 wrote to memory of 4892	4884	logagent.exe	88
PID 4884 wrote to memory of 4892	4884	logagent.exe	88
PID 4884 wrote to memory of 4892	4884	logagent.exe	88
PID 4884 wrote to memory of 1180	4884	logagent.exe	89
PID 4884 wrote to memory of 1180	4884	logagent.exe	89
PID 4884 wrote to memory of 1180	4884	logagent.exe	89
PID 4884 wrote to memory of 1180	4884	logagent.exe	89
PID 4884 wrote to memory of 1180	4884	logagent.exe	89
PID 4884 wrote to memory of 1180	4884	logagent.exe	89
PID 4884 wrote to memory of 1180	4884	logagent.exe	89
PID 4884 wrote to memory of 1180	4884	logagent.exe	89

C:\Users\Admin\AppData\Local\Temp\Document.exe
"C:\Users\Admin\AppData\Local\Temp\Document.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2560
- C:\Windows\SysWOW64\logagent.exe
  C:\Windows\System32\logagent.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:4884
- - C:\Windows\SysWOW64\logagent.exe
    C:\Windows\SysWOW64\logagent.exe /stext "C:\Users\Admin\AppData\Local\Temp\zhonloxjwqzplqjdqockakhqxznfealwxo"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:4312
- - C:\Windows\SysWOW64\logagent.exe
    C:\Windows\SysWOW64\logagent.exe /stext "C:\Users\Admin\AppData\Local\Temp\cjtxlg"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4892
- - C:\Windows\SysWOW64\logagent.exe
    C:\Windows\SysWOW64\logagent.exe /stext "C:\Users\Admin\AppData\Local\Temp\mdgqmzseg"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:1180

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/1180-148-0x0000000000400000-0x0000000000457000-memory.dmp

Download

memory/1180-147-0x0000000000400000-0x0000000000457000-memory.dmp

Download

memory/1180-145-0x0000000000400000-0x0000000000457000-memory.dmp

Download

memory/1180-143-0x0000000000400000-0x0000000000457000-memory.dmp

Download

memory/4312-146-0x0000000000400000-0x0000000000478000-memory.dmp

Download

memory/4312-137-0x0000000000400000-0x0000000000478000-memory.dmp

Download

memory/4312-135-0x0000000000400000-0x0000000000478000-memory.dmp

Download

memory/4312-151-0x0000000000400000-0x0000000000478000-memory.dmp

Download

memory/4884-133-0x0000000000400000-0x000000000047A000-memory.dmp

Download

memory/4884-132-0x0000000072600000-0x000000007267D000-memory.dmp

Download

memory/4892-139-0x0000000000400000-0x0000000000424000-memory.dmp

Download

memory/4892-141-0x0000000000400000-0x0000000000424000-memory.dmp

Download

memory/4892-149-0x0000000000400000-0x0000000000424000-memory.dmp

Download

memory/4892-150-0x0000000000400000-0x0000000000424000-memory.dmp

Download