remcos | a8e25a2520c09dd71e17afbde126f58514921c6d967a786bde096fafda08701a

Analysis

max time kernel
148s
max time network
143s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-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 spyware 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
behavioral1/memory/812-37-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/2852-36-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2660-43-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/812-37-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/2852-36-0x0000000000400000-0x0000000000478000-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
2368	powershell.exe

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-1-5-21-1506706701-1246725540-2219210854-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	regasm.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2384 set thread context of 2064	2384	IAENMAIL-A4-240717-0830-000090912_PDF.exe	33
PID 2064 set thread context of 2852	2064	regasm.exe	35
PID 2064 set thread context of 812	2064	regasm.exe	36
PID 2064 set thread context of 2660	2064	regasm.exe	37

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

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2368	powershell.exe
2852	regasm.exe
2852	regasm.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
2064	regasm.exe
2064	regasm.exe
2064	regasm.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2368	powershell.exe
Token: SeDebugPrivilege	2660	regasm.exe

Suspicious use of WriteProcessMemory 43 IoCs

description	pid	Process	procid_target
PID 2384 wrote to memory of 2368	2384	IAENMAIL-A4-240717-0830-000090912_PDF.exe	31
PID 2384 wrote to memory of 2368	2384	IAENMAIL-A4-240717-0830-000090912_PDF.exe	31
PID 2384 wrote to memory of 2368	2384	IAENMAIL-A4-240717-0830-000090912_PDF.exe	31
PID 2384 wrote to memory of 2064	2384	IAENMAIL-A4-240717-0830-000090912_PDF.exe	33
PID 2384 wrote to memory of 2064	2384	IAENMAIL-A4-240717-0830-000090912_PDF.exe	33
PID 2384 wrote to memory of 2064	2384	IAENMAIL-A4-240717-0830-000090912_PDF.exe	33
PID 2384 wrote to memory of 2064	2384	IAENMAIL-A4-240717-0830-000090912_PDF.exe	33
PID 2384 wrote to memory of 2064	2384	IAENMAIL-A4-240717-0830-000090912_PDF.exe	33
PID 2384 wrote to memory of 2064	2384	IAENMAIL-A4-240717-0830-000090912_PDF.exe	33
PID 2384 wrote to memory of 2064	2384	IAENMAIL-A4-240717-0830-000090912_PDF.exe	33
PID 2384 wrote to memory of 2064	2384	IAENMAIL-A4-240717-0830-000090912_PDF.exe	33
PID 2384 wrote to memory of 2064	2384	IAENMAIL-A4-240717-0830-000090912_PDF.exe	33
PID 2384 wrote to memory of 2064	2384	IAENMAIL-A4-240717-0830-000090912_PDF.exe	33
PID 2384 wrote to memory of 2064	2384	IAENMAIL-A4-240717-0830-000090912_PDF.exe	33
PID 2384 wrote to memory of 2064	2384	IAENMAIL-A4-240717-0830-000090912_PDF.exe	33
PID 2384 wrote to memory of 2064	2384	IAENMAIL-A4-240717-0830-000090912_PDF.exe	33
PID 2384 wrote to memory of 2064	2384	IAENMAIL-A4-240717-0830-000090912_PDF.exe	33
PID 2384 wrote to memory of 2064	2384	IAENMAIL-A4-240717-0830-000090912_PDF.exe	33
PID 2384 wrote to memory of 2064	2384	IAENMAIL-A4-240717-0830-000090912_PDF.exe	33
PID 2064 wrote to memory of 2852	2064	regasm.exe	35
PID 2064 wrote to memory of 2852	2064	regasm.exe	35
PID 2064 wrote to memory of 2852	2064	regasm.exe	35
PID 2064 wrote to memory of 2852	2064	regasm.exe	35
PID 2064 wrote to memory of 2852	2064	regasm.exe	35
PID 2064 wrote to memory of 2852	2064	regasm.exe	35
PID 2064 wrote to memory of 2852	2064	regasm.exe	35
PID 2064 wrote to memory of 2852	2064	regasm.exe	35
PID 2064 wrote to memory of 812	2064	regasm.exe	36
PID 2064 wrote to memory of 812	2064	regasm.exe	36
PID 2064 wrote to memory of 812	2064	regasm.exe	36
PID 2064 wrote to memory of 812	2064	regasm.exe	36
PID 2064 wrote to memory of 812	2064	regasm.exe	36
PID 2064 wrote to memory of 812	2064	regasm.exe	36
PID 2064 wrote to memory of 812	2064	regasm.exe	36
PID 2064 wrote to memory of 812	2064	regasm.exe	36
PID 2064 wrote to memory of 2660	2064	regasm.exe	37
PID 2064 wrote to memory of 2660	2064	regasm.exe	37
PID 2064 wrote to memory of 2660	2064	regasm.exe	37
PID 2064 wrote to memory of 2660	2064	regasm.exe	37
PID 2064 wrote to memory of 2660	2064	regasm.exe	37
PID 2064 wrote to memory of 2660	2064	regasm.exe	37
PID 2064 wrote to memory of 2660	2064	regasm.exe	37
PID 2064 wrote to memory of 2660	2064	regasm.exe	37

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:2384
- 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:2368
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:2064
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe /stext "C:\Users\Admin\AppData\Local\Temp\degandztvphwquqzjcdgqnjlwtbrylfkj"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:2852
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe /stext "C:\Users\Admin\AppData\Local\Temp\fgmlo"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:812
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe /stext "C:\Users\Admin\AppData\Local\Temp\pardoovp"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2660

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

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

degandztvphwquqzjcdgqnjlwtbrylfkj

Path C:\Users\Admin\AppData\Local\Temp\degandztvphwquqzjcdgqnjlwtbrylfkj
Size 2B
SHA256 b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209
MD5 f3b25701fe362ec84616a93a45ce9998
SHA1 d62636d8caec13f04e28442a0a6fa1afeb024bbb
SHA512 98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84
MD5 SHA1 SHA512

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memory/812-29-0x0000000000400000-0x0000000000462000-memory.dmp

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memory/812-35-0x0000000000400000-0x0000000000462000-memory.dmp

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memory/812-37-0x0000000000400000-0x0000000000462000-memory.dmp

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memory/812-31-0x0000000000400000-0x0000000000462000-memory.dmp

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memory/812-28-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

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memory/2064-49-0x0000000010000000-0x0000000010019000-memory.dmp

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memory/2064-52-0x0000000010000000-0x0000000010019000-memory.dmp

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memory/2064-64-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2064-14-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2064-12-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2064-9-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2064-20-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2064-19-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2064-63-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2064-22-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2064-23-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2064-25-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2064-60-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2064-59-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2064-57-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2064-58-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2064-56-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2064-55-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2064-54-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2064-53-0x0000000010000000-0x0000000010019000-memory.dmp

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memory/2064-18-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2368-6-0x0000000001F00000-0x0000000001F08000-memory.dmp

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memory/2368-17-0x000007FEF50F0000-0x000007FEF5A8D000-memory.dmp

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memory/2368-7-0x000007FEF50F0000-0x000007FEF5A8D000-memory.dmp

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memory/2368-21-0x000007FEF50F0000-0x000007FEF5A8D000-memory.dmp

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memory/2368-16-0x000007FEF50F0000-0x000007FEF5A8D000-memory.dmp

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memory/2368-5-0x000000001B640000-0x000000001B922000-memory.dmp

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memory/2368-4-0x000007FEF53AE000-0x000007FEF53AF000-memory.dmp

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memory/2368-10-0x000007FEF50F0000-0x000007FEF5A8D000-memory.dmp

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memory/2368-8-0x000007FEF50F0000-0x000007FEF5A8D000-memory.dmp

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memory/2660-38-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

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memory/2660-40-0x0000000000400000-0x0000000000424000-memory.dmp

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memory/2660-39-0x0000000000400000-0x0000000000424000-memory.dmp

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memory/2660-42-0x0000000000400000-0x0000000000424000-memory.dmp

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memory/2660-43-0x0000000000400000-0x0000000000424000-memory.dmp

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memory/2852-33-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/2852-30-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/2852-27-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/2852-36-0x0000000000400000-0x0000000000478000-memory.dmp

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