remcos | feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68

Analysis

max time kernel
149s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
27-08-2024 07:06

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General

Target

feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe
Size

1.1MB
MD5

b35686fa66ee7d26fecb2073722fa3c8
SHA1

b53664dd6703e0b675022e47fb84deda47bb265e
SHA256

feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68
SHA512

13f49aee8d537d22a2335854fdf391e785084ae8c71ce6eb1ae0564827aaa2cf39adea4a36e9eba25abdb433d05148d462646e51e74efaddb30a43170447eb91
SSDEEP

24576:v8lDob4/clx6DpK4NszeTdNOHFIyzbdfylY6g5iKOP:uP0T+pbNmu0zBySV

Score

10^/10

remcos remotehost collection credential_access discovery rat stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

103.161.133.245:9898

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-LN5NIY
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 7 IoCs

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

resource	yara_rule
behavioral2/memory/5080-41-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4676-40-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/5080-38-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/2940-37-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/2940-35-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/5080-34-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4676-46-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/2940-37-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/2940-35-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/4676-40-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/4676-46-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	MSBuild.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 1232 set thread context of 4504	1232	feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe	96
PID 4504 set thread context of 4676	4504	MSBuild.exe	98
PID 4504 set thread context of 2940	4504	MSBuild.exe	99
PID 4504 set thread context of 5080	4504	MSBuild.exe	100

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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MSBuild.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MSBuild.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MSBuild.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MSBuild.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
5080	MSBuild.exe
5080	MSBuild.exe
4676	MSBuild.exe
4676	MSBuild.exe
4676	MSBuild.exe
4676	MSBuild.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
4504	MSBuild.exe
4504	MSBuild.exe
4504	MSBuild.exe
4504	MSBuild.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5080	MSBuild.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 1232 wrote to memory of 4504	1232	feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe	96
PID 1232 wrote to memory of 4504	1232	feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe	96
PID 1232 wrote to memory of 4504	1232	feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe	96
PID 1232 wrote to memory of 4504	1232	feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe	96
PID 1232 wrote to memory of 4504	1232	feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe	96
PID 1232 wrote to memory of 4504	1232	feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe	96
PID 1232 wrote to memory of 4504	1232	feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe	96
PID 1232 wrote to memory of 4504	1232	feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe	96
PID 1232 wrote to memory of 4504	1232	feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe	96
PID 1232 wrote to memory of 4504	1232	feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe	96
PID 1232 wrote to memory of 4504	1232	feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe	96
PID 1232 wrote to memory of 4504	1232	feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe	96
PID 4504 wrote to memory of 1928	4504	MSBuild.exe	97
PID 4504 wrote to memory of 1928	4504	MSBuild.exe	97
PID 4504 wrote to memory of 1928	4504	MSBuild.exe	97
PID 4504 wrote to memory of 4676	4504	MSBuild.exe	98
PID 4504 wrote to memory of 4676	4504	MSBuild.exe	98
PID 4504 wrote to memory of 4676	4504	MSBuild.exe	98
PID 4504 wrote to memory of 4676	4504	MSBuild.exe	98
PID 4504 wrote to memory of 2940	4504	MSBuild.exe	99
PID 4504 wrote to memory of 2940	4504	MSBuild.exe	99
PID 4504 wrote to memory of 2940	4504	MSBuild.exe	99
PID 4504 wrote to memory of 2940	4504	MSBuild.exe	99
PID 4504 wrote to memory of 5080	4504	MSBuild.exe	100
PID 4504 wrote to memory of 5080	4504	MSBuild.exe	100
PID 4504 wrote to memory of 5080	4504	MSBuild.exe	100
PID 4504 wrote to memory of 5080	4504	MSBuild.exe	100

C:\Users\Admin\AppData\Local\Temp\feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe
"C:\Users\Admin\AppData\Local\Temp\feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1232
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:4504
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe /stext "C:\Users\Admin\AppData\Local\Temp\qjkoxsahphsiicbmmslfkscsykm"
    3⤵
    PID:1928
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe /stext "C:\Users\Admin\AppData\Local\Temp\qjkoxsahphsiicbmmslfkscsykm"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:4676
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe /stext "C:\Users\Admin\AppData\Local\Temp\bdxhyklbcxknkrpqedgyvfobgywbaa"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:2940
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe /stext "C:\Users\Admin\AppData\Local\Temp\dxcrzdwcqfcsvxlunotaykjshfocblwun"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:5080

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

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
4KB

MD5
2538ec9e8425a905937573069b77d4c2

SHA1
ad0c2b7aff4382e23444d26adac96d9697b849f3

SHA256
29338949fae4c88a972837aae898529e4c7a2c4df35982eef2f8d7b602c17f4e

SHA512
a867a471b837b9c662528ee7a5904e8fe7b1eebb277b8a7fe4d4caf423fae914baf692bb5004c02ddb539b157d63326178467e28b03aa92a533cda19155d501c

Download Submit
memory/1232-6-0x00000000050C0000-0x00000000050D8000-memory.dmp

Filesize
96KB

Download
memory/1232-2-0x0000000005380000-0x0000000005924000-memory.dmp

Filesize
5.6MB

Download
memory/1232-3-0x0000000004CF0000-0x0000000004D82000-memory.dmp

Filesize
584KB

Download
memory/1232-4-0x0000000074C50000-0x0000000075400000-memory.dmp

Filesize
7.7MB

Download
memory/1232-5-0x0000000005070000-0x000000000507A000-memory.dmp

Filesize
40KB

Download
memory/1232-17-0x0000000074C50000-0x0000000075400000-memory.dmp

Filesize
7.7MB

Download
memory/1232-7-0x0000000074C5E000-0x0000000074C5F000-memory.dmp

Filesize
4KB

Download
memory/1232-8-0x0000000074C50000-0x0000000075400000-memory.dmp

Filesize
7.7MB

Download
memory/1232-9-0x0000000006350000-0x0000000006410000-memory.dmp

Filesize
768KB

Download
memory/1232-10-0x0000000008BE0000-0x0000000008C7C000-memory.dmp

Filesize
624KB

Download
memory/1232-1-0x0000000000200000-0x0000000000316000-memory.dmp

Filesize
1.1MB

Download
memory/1232-0-0x0000000074C5E000-0x0000000074C5F000-memory.dmp

Filesize
4KB

Download
memory/2940-37-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2940-27-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2940-32-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2940-35-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4504-60-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4504-58-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4504-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4504-21-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4504-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4504-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4504-12-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4504-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4504-61-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4504-15-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4504-59-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4504-19-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4504-57-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4504-51-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4504-18-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4504-56-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4504-55-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4504-14-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4504-54-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4504-53-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4504-11-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4504-48-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4504-52-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4676-26-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4676-46-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4676-40-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4676-39-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4676-36-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/5080-30-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/5080-33-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/5080-34-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/5080-38-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/5080-41-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download