remcos | a8e25a2520c09dd71e17afbde126f58514921c6d967a786bde096fafda08701a

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
25/07/2024, 18:00

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General

Target

MalwareBazaar.exe
Size

2.2MB
MD5

6c3b88c4675ff6cad62702925a3390f1
SHA1

d7c0fdc2b3b92df96b5bcd7a390aa7312df086a5
SHA256

a8e25a2520c09dd71e17afbde126f58514921c6d967a786bde096fafda08701a
SHA512

ee611d1b240a25a02d8ea9ecca3deb943da34dfcb03a38c2e5d8b40a2cea60d4d4446f968b4af6dc6c9f21bd951b3023e16939ebd1fe0a3fd0867f6a0d143e4a
SSDEEP

49152:qB1BRf3rOSzOzrFNj8e1KbWF8K7Vk3SZTH4OWOEkw/R8jDYWg16pb67Wy/Zz:aaRrFCI4v7p

Score

10^/10

remcos remotehost collection credential_access discovery execution rat stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

103.198.26.25:96

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-IPUJM4
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 5 IoCs

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

resource	yara_rule
behavioral2/memory/3732-37-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/772-39-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/3732-38-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/4860-36-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/3732-44-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/772-39-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/3732-37-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/3732-38-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/3732-44-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
4784	powershell.exe

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-464762018-485119342-1613148473-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	installutil.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 552 set thread context of 2616	552	MalwareBazaar.exe	87
PID 2616 set thread context of 3732	2616	installutil.exe	94
PID 2616 set thread context of 772	2616	installutil.exe	96
PID 2616 set thread context of 4860	2616	installutil.exe	98

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

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
4784	powershell.exe
4784	powershell.exe
3732	installutil.exe
4860	installutil.exe
3732	installutil.exe
4860	installutil.exe
3732	installutil.exe
3732	installutil.exe

Suspicious behavior: MapViewOfSection 6 IoCs

pid	Process
2616	installutil.exe
2616	installutil.exe
2616	installutil.exe
2616	installutil.exe
2616	installutil.exe
2616	installutil.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4784	powershell.exe
Token: SeDebugPrivilege	4860	installutil.exe

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 552 wrote to memory of 4784	552	MalwareBazaar.exe	85
PID 552 wrote to memory of 4784	552	MalwareBazaar.exe	85
PID 552 wrote to memory of 2616	552	MalwareBazaar.exe	87
PID 552 wrote to memory of 2616	552	MalwareBazaar.exe	87
PID 552 wrote to memory of 2616	552	MalwareBazaar.exe	87
PID 552 wrote to memory of 2616	552	MalwareBazaar.exe	87
PID 552 wrote to memory of 2616	552	MalwareBazaar.exe	87
PID 552 wrote to memory of 2616	552	MalwareBazaar.exe	87
PID 552 wrote to memory of 2616	552	MalwareBazaar.exe	87
PID 552 wrote to memory of 2616	552	MalwareBazaar.exe	87
PID 552 wrote to memory of 2616	552	MalwareBazaar.exe	87
PID 552 wrote to memory of 2616	552	MalwareBazaar.exe	87
PID 552 wrote to memory of 2616	552	MalwareBazaar.exe	87
PID 552 wrote to memory of 2616	552	MalwareBazaar.exe	87
PID 2616 wrote to memory of 2544	2616	installutil.exe	93
PID 2616 wrote to memory of 2544	2616	installutil.exe	93
PID 2616 wrote to memory of 2544	2616	installutil.exe	93
PID 2616 wrote to memory of 3732	2616	installutil.exe	94
PID 2616 wrote to memory of 3732	2616	installutil.exe	94
PID 2616 wrote to memory of 3732	2616	installutil.exe	94
PID 2616 wrote to memory of 3732	2616	installutil.exe	94
PID 2616 wrote to memory of 2644	2616	installutil.exe	95
PID 2616 wrote to memory of 2644	2616	installutil.exe	95
PID 2616 wrote to memory of 2644	2616	installutil.exe	95
PID 2616 wrote to memory of 772	2616	installutil.exe	96
PID 2616 wrote to memory of 772	2616	installutil.exe	96
PID 2616 wrote to memory of 772	2616	installutil.exe	96
PID 2616 wrote to memory of 772	2616	installutil.exe	96
PID 2616 wrote to memory of 4244	2616	installutil.exe	97
PID 2616 wrote to memory of 4244	2616	installutil.exe	97
PID 2616 wrote to memory of 4244	2616	installutil.exe	97
PID 2616 wrote to memory of 4860	2616	installutil.exe	98
PID 2616 wrote to memory of 4860	2616	installutil.exe	98
PID 2616 wrote to memory of 4860	2616	installutil.exe	98
PID 2616 wrote to memory of 4860	2616	installutil.exe	98

C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe
"C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:552
- C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe
  C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe Add-MpPreference -ExclusionPath $env:UserProfile
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4784
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:2616
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe /stext "C:\Users\Admin\AppData\Local\Temp\uheqdmcarrjcxxvqmynseujzsnzpuwr"
    3⤵
    PID:2544
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe /stext "C:\Users\Admin\AppData\Local\Temp\uheqdmcarrjcxxvqmynseujzsnzpuwr"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:3732
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe /stext "C:\Users\Admin\AppData\Local\Temp\ebkjwfnbfhbhhdjudjaupgeistrqvhphdr"
    3⤵
    PID:2644
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe /stext "C:\Users\Admin\AppData\Local\Temp\ebkjwfnbfhbhhdjudjaupgeistrqvhphdr"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:772
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe /stext "C:\Users\Admin\AppData\Local\Temp\odpbxx"
    3⤵
    PID:4244
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe /stext "C:\Users\Admin\AppData\Local\Temp\odpbxx"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4860

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_bzz04z0z.spg.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
4KB

MD5
5f9f645ff4e46b384ac7a261904aabcb

SHA1
203a1216e576f93c2236a833b93c32c4fd8a0d3b

SHA256
887d93e6cbd14afa0cdf26f303b89cc1963ca5c5d7faba6c91ae87be183273b3

SHA512
b679e91072a1c3fa59e40ff6565c23549f33520c9c6bc8d1f4e055d65dddec3a8e93c165060668fbabae9f27de28985cc826b23f8402caa5d7bd4455165acbde

Download Submit
memory/772-32-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/772-31-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/772-39-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2616-72-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-73-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-15-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-90-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-55-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-89-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-21-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-23-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-26-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-28-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-88-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-87-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-13-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-86-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-85-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-84-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-83-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-82-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-81-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-57-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-79-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-78-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-46-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2616-49-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2616-50-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2616-51-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-52-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-53-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-54-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-58-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-80-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-56-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-59-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-60-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-61-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-62-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-63-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-64-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-65-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-66-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-67-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-68-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-69-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-70-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-71-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-77-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-14-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-74-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-75-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2616-76-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3732-37-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3732-29-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3732-44-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3732-38-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3732-33-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4784-11-0x00007FFEE4840000-0x00007FFEE5301000-memory.dmp

Filesize
10.8MB

Download
memory/4784-0-0x00007FFEE4843000-0x00007FFEE4845000-memory.dmp

Filesize
8KB

Download
memory/4784-12-0x00007FFEE4840000-0x00007FFEE5301000-memory.dmp

Filesize
10.8MB

Download
memory/4784-1-0x000002A5C98C0000-0x000002A5C98E2000-memory.dmp

Filesize
136KB

Download
memory/4784-19-0x00007FFEE4840000-0x00007FFEE5301000-memory.dmp

Filesize
10.8MB

Download
memory/4784-16-0x00007FFEE4840000-0x00007FFEE5301000-memory.dmp

Filesize
10.8MB

Download
memory/4860-34-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4860-35-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4860-36-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download