remcos | bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13

Analysis

max time kernel
149s
max time network
145s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
01/09/2024, 01:38

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General

Target

bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.exe
Size

971KB
MD5

7e0fb6d08352c44ae511b38003e9d852
SHA1

ecb7694e316c82d3cb91bd76aa395169f8345a27
SHA256

bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13
SHA512

83be71468976f320faa3cbb47afb71b796d32e53efeb009ea793d663280c4bb8fe735748bcb8e4556cc67664da9b2ec2cedb0a3514e2a5b928555ee4534b4802
SSDEEP

24576:lum6Hz4CHoQy8c6vIGhRAqYVw0On9y8Vo3/9V+M:lum68CFy8JI/Dw0Onse

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 6 IoCs

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

resource	yara_rule
behavioral1/memory/2632-40-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2632-44-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/1268-52-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/2132-50-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/2632-57-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2132-65-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/2132-50-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/2132-65-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/2632-40-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/2632-44-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/2632-57-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	MSBuild.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 1700 set thread context of 2112	1700	bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.exe	31
PID 2112 set thread context of 2632	2112	MSBuild.exe	33
PID 2112 set thread context of 2132	2112	MSBuild.exe	34
PID 2112 set thread context of 1268	2112	MSBuild.exe	35

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	bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MSBuild.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2632	MSBuild.exe
2632	MSBuild.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
2112	MSBuild.exe
2112	MSBuild.exe
2112	MSBuild.exe
2112	MSBuild.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1268	MSBuild.exe

Suspicious use of WriteProcessMemory 32 IoCs

description	pid	Process	procid_target
PID 1700 wrote to memory of 2112	1700	bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.exe	31
PID 1700 wrote to memory of 2112	1700	bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.exe	31
PID 1700 wrote to memory of 2112	1700	bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.exe	31
PID 1700 wrote to memory of 2112	1700	bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.exe	31
PID 1700 wrote to memory of 2112	1700	bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.exe	31
PID 1700 wrote to memory of 2112	1700	bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.exe	31
PID 1700 wrote to memory of 2112	1700	bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.exe	31
PID 1700 wrote to memory of 2112	1700	bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.exe	31
PID 1700 wrote to memory of 2112	1700	bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.exe	31
PID 1700 wrote to memory of 2112	1700	bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.exe	31
PID 1700 wrote to memory of 2112	1700	bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.exe	31
PID 1700 wrote to memory of 2112	1700	bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.exe	31
PID 1700 wrote to memory of 2112	1700	bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.exe	31
PID 2112 wrote to memory of 2896	2112	MSBuild.exe	32
PID 2112 wrote to memory of 2896	2112	MSBuild.exe	32
PID 2112 wrote to memory of 2896	2112	MSBuild.exe	32
PID 2112 wrote to memory of 2896	2112	MSBuild.exe	32
PID 2112 wrote to memory of 2632	2112	MSBuild.exe	33
PID 2112 wrote to memory of 2632	2112	MSBuild.exe	33
PID 2112 wrote to memory of 2632	2112	MSBuild.exe	33
PID 2112 wrote to memory of 2632	2112	MSBuild.exe	33
PID 2112 wrote to memory of 2632	2112	MSBuild.exe	33
PID 2112 wrote to memory of 2132	2112	MSBuild.exe	34
PID 2112 wrote to memory of 2132	2112	MSBuild.exe	34
PID 2112 wrote to memory of 2132	2112	MSBuild.exe	34
PID 2112 wrote to memory of 2132	2112	MSBuild.exe	34
PID 2112 wrote to memory of 2132	2112	MSBuild.exe	34
PID 2112 wrote to memory of 1268	2112	MSBuild.exe	35
PID 2112 wrote to memory of 1268	2112	MSBuild.exe	35
PID 2112 wrote to memory of 1268	2112	MSBuild.exe	35
PID 2112 wrote to memory of 1268	2112	MSBuild.exe	35
PID 2112 wrote to memory of 1268	2112	MSBuild.exe	35

C:\Users\Admin\AppData\Local\Temp\bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.exe
"C:\Users\Admin\AppData\Local\Temp\bf959c8b9bbb333f1ba32b7b6100d6c799cf6d21411914ac288bf9971b3ada13.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1700
- 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:2112
- - 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\npskourtkzutxaxhbfco"
    3⤵
    PID:2896
- - 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\npskourtkzutxaxhbfco"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:2632
- - 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\xkxcpnkvghmyaollkpxqrdp"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:2132
- - 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\zmlvpfvouqedkuzpbajjuijatku"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:1268

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\npskourtkzutxaxhbfco

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
memory/1268-48-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1268-52-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1268-51-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1700-3-0x0000000004FF0000-0x00000000050D8000-memory.dmp

Filesize
928KB

Download
memory/1700-5-0x000000007407E000-0x000000007407F000-memory.dmp

Filesize
4KB

Download
memory/1700-6-0x0000000074070000-0x000000007475E000-memory.dmp

Filesize
6.9MB

Download
memory/1700-7-0x0000000005260000-0x0000000005320000-memory.dmp

Filesize
768KB

Download
memory/1700-4-0x00000000003D0000-0x00000000003E8000-memory.dmp

Filesize
96KB

Download
memory/1700-26-0x0000000074070000-0x000000007475E000-memory.dmp

Filesize
6.9MB

Download
memory/1700-2-0x0000000074070000-0x000000007475E000-memory.dmp

Filesize
6.9MB

Download
memory/1700-1-0x0000000001320000-0x0000000001418000-memory.dmp

Filesize
992KB

Download
memory/1700-0-0x000000007407E000-0x000000007407F000-memory.dmp

Filesize
4KB

Download
memory/2112-16-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2112-62-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2112-10-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2112-9-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2112-28-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2112-27-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2112-14-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2112-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2112-23-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2112-29-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2112-30-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2112-32-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2112-31-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2112-34-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2112-71-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2112-18-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2112-70-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2112-69-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2112-68-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2112-67-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2112-66-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2112-64-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2112-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2112-22-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/2112-63-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2112-12-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2112-8-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2112-59-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2132-50-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2132-46-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2132-65-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2132-45-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2132-49-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2632-57-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2632-44-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2632-39-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2632-40-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2632-37-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download