remcos | a8e25a2520c09dd71e17afbde126f58514921c6d967a786bde096fafda08701a

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
24/07/2024, 18:03

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General

Target
IAENMAIL-A4-240717-0830-000090912_PDF.exe
Size 2.2MB
Sample240724-wnjlrssfla
SHA256 a8e25a2520c09dd71e17afbde126f58514921c6d967a786bde096fafda08701a
MD5 6c3b88c4675ff6cad62702925a3390f1
SHA1 d7c0fdc2b3b92df96b5bcd7a390aa7312df086a5
SHA512 ee611d1b240a25a02d8ea9ecca3deb943da34dfcb03a38c2e5d8b40a2cea60d4d4446f968b4af6dc6c9f21bd951b3023e16939ebd1fe0a3fd0867f6a0d143e4a
SSDEEP 49152:qB1BRf3rOSzOzrFNj8e1KbWF8K7Vk3SZTH4OWOEkw/R8jDYWg16pb67Wy/Zz:aaRrFCI4v7p
MD5 SHA1 SHA512 SSDEEP

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 3 IoCs

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

resource	yara_rule
behavioral2/memory/4716-32-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4484-36-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/4144-35-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/4716-32-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/4484-36-0x0000000000400000-0x0000000000478000-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
520	powershell.exe

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3419463127-3903270268-2580331543-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	AddInProcess32.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 472 set thread context of 4916	472	IAENMAIL-A4-240717-0830-000090912_PDF.exe	89
PID 4916 set thread context of 4484	4916	AddInProcess32.exe	98
PID 4916 set thread context of 4716	4916	AddInProcess32.exe	99
PID 4916 set thread context of 4144	4916	AddInProcess32.exe	101

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	AddInProcess32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AddInProcess32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AddInProcess32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AddInProcess32.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
520	powershell.exe
520	powershell.exe
4484	AddInProcess32.exe
4484	AddInProcess32.exe
4144	AddInProcess32.exe
4144	AddInProcess32.exe
4484	AddInProcess32.exe
4484	AddInProcess32.exe

Suspicious behavior: MapViewOfSection 6 IoCs

pid	Process
4916	AddInProcess32.exe
4916	AddInProcess32.exe
4916	AddInProcess32.exe
4916	AddInProcess32.exe
4916	AddInProcess32.exe
4916	AddInProcess32.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	520	powershell.exe
Token: SeDebugPrivilege	4144	AddInProcess32.exe

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 472 wrote to memory of 520	472	IAENMAIL-A4-240717-0830-000090912_PDF.exe	87
PID 472 wrote to memory of 520	472	IAENMAIL-A4-240717-0830-000090912_PDF.exe	87
PID 472 wrote to memory of 4916	472	IAENMAIL-A4-240717-0830-000090912_PDF.exe	89
PID 472 wrote to memory of 4916	472	IAENMAIL-A4-240717-0830-000090912_PDF.exe	89
PID 472 wrote to memory of 4916	472	IAENMAIL-A4-240717-0830-000090912_PDF.exe	89
PID 472 wrote to memory of 4916	472	IAENMAIL-A4-240717-0830-000090912_PDF.exe	89
PID 472 wrote to memory of 4916	472	IAENMAIL-A4-240717-0830-000090912_PDF.exe	89
PID 472 wrote to memory of 4916	472	IAENMAIL-A4-240717-0830-000090912_PDF.exe	89
PID 472 wrote to memory of 4916	472	IAENMAIL-A4-240717-0830-000090912_PDF.exe	89
PID 472 wrote to memory of 4916	472	IAENMAIL-A4-240717-0830-000090912_PDF.exe	89
PID 472 wrote to memory of 4916	472	IAENMAIL-A4-240717-0830-000090912_PDF.exe	89
PID 472 wrote to memory of 4916	472	IAENMAIL-A4-240717-0830-000090912_PDF.exe	89
PID 472 wrote to memory of 4916	472	IAENMAIL-A4-240717-0830-000090912_PDF.exe	89
PID 472 wrote to memory of 4916	472	IAENMAIL-A4-240717-0830-000090912_PDF.exe	89
PID 4916 wrote to memory of 5028	4916	AddInProcess32.exe	96
PID 4916 wrote to memory of 5028	4916	AddInProcess32.exe	96
PID 4916 wrote to memory of 5028	4916	AddInProcess32.exe	96
PID 4916 wrote to memory of 4240	4916	AddInProcess32.exe	97
PID 4916 wrote to memory of 4240	4916	AddInProcess32.exe	97
PID 4916 wrote to memory of 4240	4916	AddInProcess32.exe	97
PID 4916 wrote to memory of 4484	4916	AddInProcess32.exe	98
PID 4916 wrote to memory of 4484	4916	AddInProcess32.exe	98
PID 4916 wrote to memory of 4484	4916	AddInProcess32.exe	98
PID 4916 wrote to memory of 4484	4916	AddInProcess32.exe	98
PID 4916 wrote to memory of 4716	4916	AddInProcess32.exe	99
PID 4916 wrote to memory of 4716	4916	AddInProcess32.exe	99
PID 4916 wrote to memory of 4716	4916	AddInProcess32.exe	99
PID 4916 wrote to memory of 4716	4916	AddInProcess32.exe	99
PID 4916 wrote to memory of 332	4916	AddInProcess32.exe	100
PID 4916 wrote to memory of 332	4916	AddInProcess32.exe	100
PID 4916 wrote to memory of 332	4916	AddInProcess32.exe	100
PID 4916 wrote to memory of 4144	4916	AddInProcess32.exe	101
PID 4916 wrote to memory of 4144	4916	AddInProcess32.exe	101
PID 4916 wrote to memory of 4144	4916	AddInProcess32.exe	101
PID 4916 wrote to memory of 4144	4916	AddInProcess32.exe	101

C:\Users\Admin\AppData\Local\Temp\IAENMAIL-A4-240717-0830-000090912_PDF.exe
"C:\Users\Admin\AppData\Local\Temp\IAENMAIL-A4-240717-0830-000090912_PDF.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:472
- 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:520
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:4916
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe /stext "C:\Users\Admin\AppData\Local\Temp\assdmyzlszcwhqwlvtbelfsydrlnymd"
    3⤵
    PID:5028
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe /stext "C:\Users\Admin\AppData\Local\Temp\assdmyzlszcwhqwlvtbelfsydrlnymd"
    3⤵
    PID:4240
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe /stext "C:\Users\Admin\AppData\Local\Temp\assdmyzlszcwhqwlvtbelfsydrlnymd"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:4484
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe /stext "C:\Users\Admin\AppData\Local\Temp\kmxw"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:4716
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe /stext "C:\Users\Admin\AppData\Local\Temp\uocooju"
    3⤵
    PID:332
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe /stext "C:\Users\Admin\AppData\Local\Temp\uocooju"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4144

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

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Downloads

__PSScriptPolicyTest_20okt5pj.zsl.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_20okt5pj.zsl.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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assdmyzlszcwhqwlvtbelfsydrlnymd

Path C:\Users\Admin\AppData\Local\Temp\assdmyzlszcwhqwlvtbelfsydrlnymd
Size 4KB
SHA256 9e347aa1a363532c72d7728abe1afdc48b9418fae8cbf8bcbc50c9c22dfefa57
MD5 60e30555becdb968406edb87fff512ef
SHA1 65551417f6371c40e6d5dab38fe87ab634f9446e
SHA512 cbe1aebf171b54f481028208aa85fb04145cc40772cc30e67107caa5cc70c73f274da362766f125093c1fab1416c687744e53e0f7c30b6ead866c6f6ba671449
SSDEEP 48:wvvv0QTxfvvcQTxfdvv0QTxBvv0QTxakvv0QT7:mvlxvdp1vlPvlbvl7
MD5 SHA1 SHA512 SSDEEP

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memory/520-18-0x00007FF8AD5A0000-0x00007FF8AE061000-memory.dmp

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memory/520-11-0x00007FF8AD5A0000-0x00007FF8AE061000-memory.dmp

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memory/520-12-0x00007FF8AD5A0000-0x00007FF8AE061000-memory.dmp

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memory/520-6-0x000002175CA10000-0x000002175CA32000-memory.dmp

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memory/520-0-0x00007FF8AD5A3000-0x00007FF8AD5A5000-memory.dmp

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memory/4144-34-0x0000000000400000-0x0000000000424000-memory.dmp

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memory/4144-30-0x0000000000400000-0x0000000000424000-memory.dmp

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memory/4144-35-0x0000000000400000-0x0000000000424000-memory.dmp

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memory/4484-28-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/4484-33-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/4484-36-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/4716-32-0x0000000000400000-0x0000000000462000-memory.dmp

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memory/4716-31-0x0000000000400000-0x0000000000462000-memory.dmp

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memory/4716-29-0x0000000000400000-0x0000000000462000-memory.dmp

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memory/4916-20-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4916-46-0x0000000010000000-0x0000000010019000-memory.dmp

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memory/4916-25-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4916-24-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4916-23-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4916-22-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4916-21-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4916-19-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4916-17-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4916-16-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4916-13-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4916-42-0x0000000010000000-0x0000000010019000-memory.dmp

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memory/4916-47-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4916-27-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4916-45-0x0000000010000000-0x0000000010019000-memory.dmp

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memory/4916-48-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4916-49-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4916-50-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4916-52-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4916-51-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4916-53-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4916-54-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4916-55-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4916-56-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4916-57-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4916-58-0x0000000000400000-0x0000000000482000-memory.dmp

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