remcos | b4463bc49e5f7fdfe610f17163ad8b399dda74e6843c4ea7fccf379c95e06e4f

Analysis

max time kernel
149s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
01/10/2024, 01:40

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General

Target

b4463bc49e5f7fdfe610f17163ad8b399dda74e6843c4ea7fccf379c95e06e4f.exe
Size

964KB
MD5

6138a05e066e20c8e39c760bec68e113
SHA1

04644b6a5ea07a58824ff156b240ca9481806469
SHA256

b4463bc49e5f7fdfe610f17163ad8b399dda74e6843c4ea7fccf379c95e06e4f
SHA512

811381b33c3be3ee817a127c42e3c886802331d7453230658244872c97cddc36aa4c0b7d05e30c9280bfe1f800fedb481575cd0ab502386953af4505a5dd7aaf
SSDEEP

24576:LI++Z/jfG+Nv4GhFASI4tKX2Fjpm87bb:LI++ZLfG+SGhF/tImT

Score

10^/10

remcos remotehost collection discovery rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

103.186.116.220:6565

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-9XV80Z
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

Detected Nirsoft tools 8 IoCs

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

resource	yara_rule
behavioral2/memory/3688-33-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/1228-37-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/1228-38-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/1228-40-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/3688-39-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/3688-32-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4640-41-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/4640-52-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/3688-33-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/3688-39-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/3688-32-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/4640-41-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/4640-52-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	MSBuild.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 4540 set thread context of 3080	4540	b4463bc49e5f7fdfe610f17163ad8b399dda74e6843c4ea7fccf379c95e06e4f.exe	97
PID 3080 set thread context of 4640	3080	MSBuild.exe	98
PID 3080 set thread context of 3688	3080	MSBuild.exe	99
PID 3080 set thread context of 1228	3080	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	b4463bc49e5f7fdfe610f17163ad8b399dda74e6843c4ea7fccf379c95e06e4f.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 6 IoCs

pid	Process
1228	MSBuild.exe
1228	MSBuild.exe
4640	MSBuild.exe
4640	MSBuild.exe
4640	MSBuild.exe
4640	MSBuild.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
3080	MSBuild.exe
3080	MSBuild.exe
3080	MSBuild.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1228	MSBuild.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 4540 wrote to memory of 3080	4540	b4463bc49e5f7fdfe610f17163ad8b399dda74e6843c4ea7fccf379c95e06e4f.exe	97
PID 4540 wrote to memory of 3080	4540	b4463bc49e5f7fdfe610f17163ad8b399dda74e6843c4ea7fccf379c95e06e4f.exe	97
PID 4540 wrote to memory of 3080	4540	b4463bc49e5f7fdfe610f17163ad8b399dda74e6843c4ea7fccf379c95e06e4f.exe	97
PID 4540 wrote to memory of 3080	4540	b4463bc49e5f7fdfe610f17163ad8b399dda74e6843c4ea7fccf379c95e06e4f.exe	97
PID 4540 wrote to memory of 3080	4540	b4463bc49e5f7fdfe610f17163ad8b399dda74e6843c4ea7fccf379c95e06e4f.exe	97
PID 4540 wrote to memory of 3080	4540	b4463bc49e5f7fdfe610f17163ad8b399dda74e6843c4ea7fccf379c95e06e4f.exe	97
PID 4540 wrote to memory of 3080	4540	b4463bc49e5f7fdfe610f17163ad8b399dda74e6843c4ea7fccf379c95e06e4f.exe	97
PID 4540 wrote to memory of 3080	4540	b4463bc49e5f7fdfe610f17163ad8b399dda74e6843c4ea7fccf379c95e06e4f.exe	97
PID 4540 wrote to memory of 3080	4540	b4463bc49e5f7fdfe610f17163ad8b399dda74e6843c4ea7fccf379c95e06e4f.exe	97
PID 4540 wrote to memory of 3080	4540	b4463bc49e5f7fdfe610f17163ad8b399dda74e6843c4ea7fccf379c95e06e4f.exe	97
PID 4540 wrote to memory of 3080	4540	b4463bc49e5f7fdfe610f17163ad8b399dda74e6843c4ea7fccf379c95e06e4f.exe	97
PID 4540 wrote to memory of 3080	4540	b4463bc49e5f7fdfe610f17163ad8b399dda74e6843c4ea7fccf379c95e06e4f.exe	97
PID 3080 wrote to memory of 4640	3080	MSBuild.exe	98
PID 3080 wrote to memory of 4640	3080	MSBuild.exe	98
PID 3080 wrote to memory of 4640	3080	MSBuild.exe	98
PID 3080 wrote to memory of 4640	3080	MSBuild.exe	98
PID 3080 wrote to memory of 3688	3080	MSBuild.exe	99
PID 3080 wrote to memory of 3688	3080	MSBuild.exe	99
PID 3080 wrote to memory of 3688	3080	MSBuild.exe	99
PID 3080 wrote to memory of 3688	3080	MSBuild.exe	99
PID 3080 wrote to memory of 1228	3080	MSBuild.exe	100
PID 3080 wrote to memory of 1228	3080	MSBuild.exe	100
PID 3080 wrote to memory of 1228	3080	MSBuild.exe	100
PID 3080 wrote to memory of 1228	3080	MSBuild.exe	100

C:\Users\Admin\AppData\Local\Temp\b4463bc49e5f7fdfe610f17163ad8b399dda74e6843c4ea7fccf379c95e06e4f.exe
"C:\Users\Admin\AppData\Local\Temp\b4463bc49e5f7fdfe610f17163ad8b399dda74e6843c4ea7fccf379c95e06e4f.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4540
- 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:3080
- - 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\npyjrrfdkfzzpi"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:4640
- - 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\prlcjjqxyoreroekoo"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:3688
- - 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\alrmkcaymwjjbuaoxympf"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1228

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4324,i,16316361669272684588,6171287487746154806,262144 --variations-seed-version --mojo-platform-channel-handle=4076 /prefetch:8
1⤵
PID:2120

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

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\npyjrrfdkfzzpi

Filesize
4KB

MD5
cda83eba5a004554ccdc061fd3df499c

SHA1
58ff2ecb9d47be10335e104896c87c62dc328523

SHA256
e384f4d46587646c6e0f9d2ee90b7bc57b49cea936b37cf8ab81ef3c4ce468ac

SHA512
f55ce20f0cf8b603fad765b889607f967c22d377fa4ac417ba1309d0aced9231e197bb4107d1c92bb99f51c04cc68ce26148727a8b694886710100c01f3de597

Download Submit
memory/1228-37-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1228-31-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1228-36-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1228-40-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1228-38-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3080-54-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3080-58-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3080-68-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3080-67-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3080-66-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3080-12-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3080-11-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3080-14-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3080-15-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3080-16-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3080-17-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3080-65-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3080-19-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3080-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3080-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3080-21-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3080-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3080-64-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3080-63-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3080-61-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3080-62-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3080-60-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3080-59-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3080-57-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3688-33-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3688-39-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3688-27-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3688-32-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3688-30-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4540-7-0x00000000744BE000-0x00000000744BF000-memory.dmp

Filesize
4KB

Download
memory/4540-18-0x00000000744B0000-0x0000000074C60000-memory.dmp

Filesize
7.7MB

Download
memory/4540-8-0x00000000744B0000-0x0000000074C60000-memory.dmp

Filesize
7.7MB

Download
memory/4540-1-0x0000000000EF0000-0x0000000000FE6000-memory.dmp

Filesize
984KB

Download
memory/4540-0-0x00000000744BE000-0x00000000744BF000-memory.dmp

Filesize
4KB

Download
memory/4540-4-0x00000000059C0000-0x00000000059CA000-memory.dmp

Filesize
40KB

Download
memory/4540-5-0x00000000744B0000-0x0000000074C60000-memory.dmp

Filesize
7.7MB

Download
memory/4540-6-0x0000000007030000-0x0000000007040000-memory.dmp

Filesize
64KB

Download
memory/4540-9-0x00000000074D0000-0x0000000007590000-memory.dmp

Filesize
768KB

Download
memory/4540-10-0x0000000009BA0000-0x0000000009C3C000-memory.dmp

Filesize
624KB

Download
memory/4540-2-0x0000000005FE0000-0x0000000006584000-memory.dmp

Filesize
5.6MB

Download
memory/4540-3-0x0000000005A30000-0x0000000005AC2000-memory.dmp

Filesize
584KB

Download
memory/4640-25-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4640-41-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4640-28-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4640-34-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4640-52-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download