remcos | 997371c951144335618b3c5f4608afebf7688a58b6a95cdc71f237f2a7cc56a2

General

Target

download1.exe
Size

483KB
MD5

b0b179cb58814287051a3933455c382e
SHA1

23bb06299fe32cc15786f9b79c22e5d7af50802a
SHA256

997371c951144335618b3c5f4608afebf7688a58b6a95cdc71f237f2a7cc56a2
SHA512

6c0c6fbd544517b05e17cdd15e64698df5683b51a9fc79dfe51e18c62202d2d45626ba41e6c9b7b7ae507ce474c948f501971815afa6accc81b4268afafb11c9
SSDEEP

6144:RTz+c6KHYBhDc1RGJdv//NkUn+N5Bkf/0TELRvIZPjbsAOZZmAX4crgWT4:RTlrYw1RUh3NFn+N5WfIQIjbs/ZmgT4

Score

10^/10

remcos remotehost collection credential_access discovery rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

maxert.wemnbbsweoipmngbyutrdcunbgrtjeroendns.pro:6845

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
notpad0
keylog_path
%Temp%
mouse_option
false
mutex
Rmc-EPF38I
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
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

Detected Nirsoft tools 10 IoCs

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

resource	yara_rule
behavioral2/memory/4368-11-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/2964-10-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/2920-26-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/2964-19-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/2920-18-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/2920-17-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4368-16-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/2920-15-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/2964-14-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4368-28-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/2964-10-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/2964-19-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/2964-14-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/4368-11-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/4368-16-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/4368-28-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

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

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2412658365-3084825385-3340777666-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	download1.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4916 set thread context of 4368	4916	download1.exe	83
PID 4916 set thread context of 2964	4916	download1.exe	84
PID 4916 set thread context of 2920	4916	download1.exe	85

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	download1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	download1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	download1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	download1.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4368	download1.exe
4368	download1.exe
2920	download1.exe
2920	download1.exe
4368	download1.exe
4368	download1.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
4916	download1.exe
4916	download1.exe
4916	download1.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2920	download1.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4916	download1.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4916 wrote to memory of 4368	4916	download1.exe	83
PID 4916 wrote to memory of 4368	4916	download1.exe	83
PID 4916 wrote to memory of 4368	4916	download1.exe	83
PID 4916 wrote to memory of 2964	4916	download1.exe	84
PID 4916 wrote to memory of 2964	4916	download1.exe	84
PID 4916 wrote to memory of 2964	4916	download1.exe	84
PID 4916 wrote to memory of 2920	4916	download1.exe	85
PID 4916 wrote to memory of 2920	4916	download1.exe	85
PID 4916 wrote to memory of 2920	4916	download1.exe	85

C:\Users\Admin\AppData\Local\Temp\download1.exe
"C:\Users\Admin\AppData\Local\Temp\download1.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4916
- C:\Users\Admin\AppData\Local\Temp\download1.exe
  C:\Users\Admin\AppData\Local\Temp\download1.exe /stext "C:\Users\Admin\AppData\Local\Temp\zjnt"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:4368
- C:\Users\Admin\AppData\Local\Temp\download1.exe
  C:\Users\Admin\AppData\Local\Temp\download1.exe /stext "C:\Users\Admin\AppData\Local\Temp\jdtdyghk"
  2⤵
  - Accesses Microsoft Outlook accounts
  - System Location Discovery: System Language Discovery
  PID:2964
- C:\Users\Admin\AppData\Local\Temp\download1.exe
  C:\Users\Admin\AppData\Local\Temp\download1.exe /stext "C:\Users\Admin\AppData\Local\Temp\mygwzqseilv"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2920

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\notpad0\logs.dat

Filesize
144B

MD5
ce1c6923e54532770996084ea2c34471

SHA1
b174d93790fff8a999d441f0e6b34182306a9472

SHA256
1015b43196ad7a0a6165f75836054a770041cb4cb085982dba9a1f31c1061b02

SHA512
47c725556067399e9cde1eba7c298f25f8d57df4bb0e39c2fb8d32c527652a92e429435c20f387be750674a7e29c8e070d8cbbf87990436607ae5153459f4797

Download Submit
C:\Users\Admin\AppData\Local\Temp\zjnt

Filesize
4KB

MD5
c0ab2847671ed5375328c5127a02cc72

SHA1
dc2bcb51562fb17e5c8787833bc0181d88a5b75e

SHA256
e961f466a0638bc99182d0056245e2d8bf1ccc13a189b802aada981f379e2384

SHA512
0b8b634d21ac71e02cef86687bf84b6fcecfd24dafab8130f42ce8b4b3f308a2e1b1fa7bf8d37f2eda76efae2b30b8d39f41d808d771562d8545ed144241924f

Download Submit
memory/2920-17-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2920-8-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2920-13-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2920-26-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2920-15-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2920-18-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2964-19-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2964-4-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2964-9-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2964-14-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2964-10-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4368-7-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4368-3-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4368-28-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4368-11-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4368-16-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4916-34-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4916-35-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4916-31-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4916-36-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4916-40-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4916-41-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4916-37-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download

Analysis

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