remcos | b8022e8002a8e01a6364fdcc6d53275b6edf3d196e36f0b4c9645de2570cfd48

Analysis

max time kernel
150s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
03-09-2024 13:23

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General

Target

Rgh99876k7e.exe
Size

1.5MB
MD5

bd6420aaf066a5b4533598417866bc67
SHA1

cf56376da61f4f34034fa4cc525e708052a5ecd3
SHA256

b8022e8002a8e01a6364fdcc6d53275b6edf3d196e36f0b4c9645de2570cfd48
SHA512

d9b394fc25949d552b64061810cd4452d24ee473c5755bada25b1db5ad35652a57b545c53c5e1dea88feac376b86e838a6b87886e9ad50e1f582eb2b985cda78
SSDEEP

24576:zqDEvCTbMWu7rQYlBQcBiT6rprG8auS2rwF3q65FE8wvsO5BaH3:zTvC/MTQYxsWR7auSY65G8wDKH

Score

10^/10

remcos remotehost collection credential_access discovery rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

192.210.150.26:8787

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-NKQ1SM
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 7 IoCs

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

resource	yara_rule
behavioral2/memory/3592-55-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/3592-51-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/3236-53-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/3236-48-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/3592-60-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4876-63-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/3236-65-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/3592-55-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/3592-51-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/3592-60-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/3236-53-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/3236-48-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/3236-65-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\antholite.vbs	antholite.exe

Executes dropped EXE 4 IoCs

pid	Process
2060	antholite.exe
3236	antholite.exe
3592	antholite.exe
4876	antholite.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-1-5-21-656926755-4116854191-210765258-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	antholite.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/files/0x0003000000022cc6-13.dat	autoit_exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2060 set thread context of 3236	2060	antholite.exe	93
PID 2060 set thread context of 3592	2060	antholite.exe	94
PID 2060 set thread context of 4876	2060	antholite.exe	95

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	Rgh99876k7e.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	antholite.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	antholite.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	antholite.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	antholite.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3236	antholite.exe
3236	antholite.exe
4876	antholite.exe
4876	antholite.exe
3236	antholite.exe
3236	antholite.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
2060	antholite.exe
2060	antholite.exe
2060	antholite.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4876	antholite.exe

Suspicious use of FindShellTrayWindow 4 IoCs

pid	Process
3972	Rgh99876k7e.exe
3972	Rgh99876k7e.exe
2060	antholite.exe
2060	antholite.exe

Suspicious use of SendNotifyMessage 4 IoCs

pid	Process
3972	Rgh99876k7e.exe
3972	Rgh99876k7e.exe
2060	antholite.exe
2060	antholite.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3972 wrote to memory of 2060	3972	Rgh99876k7e.exe	86
PID 3972 wrote to memory of 2060	3972	Rgh99876k7e.exe	86
PID 3972 wrote to memory of 2060	3972	Rgh99876k7e.exe	86
PID 2060 wrote to memory of 3236	2060	antholite.exe	93
PID 2060 wrote to memory of 3236	2060	antholite.exe	93
PID 2060 wrote to memory of 3236	2060	antholite.exe	93
PID 2060 wrote to memory of 3236	2060	antholite.exe	93
PID 2060 wrote to memory of 3592	2060	antholite.exe	94
PID 2060 wrote to memory of 3592	2060	antholite.exe	94
PID 2060 wrote to memory of 3592	2060	antholite.exe	94
PID 2060 wrote to memory of 3592	2060	antholite.exe	94
PID 2060 wrote to memory of 4876	2060	antholite.exe	95
PID 2060 wrote to memory of 4876	2060	antholite.exe	95
PID 2060 wrote to memory of 4876	2060	antholite.exe	95
PID 2060 wrote to memory of 4876	2060	antholite.exe	95

C:\Users\Admin\AppData\Local\Temp\Rgh99876k7e.exe
"C:\Users\Admin\AppData\Local\Temp\Rgh99876k7e.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:3972
- C:\Users\Admin\AppData\Local\Cocles\antholite.exe
  "C:\Users\Admin\AppData\Local\Temp\Rgh99876k7e.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2060
- - C:\Users\Admin\AppData\Local\Cocles\antholite.exe
    C:\Users\Admin\AppData\Local\Cocles\antholite.exe /stext "C:\Users\Admin\AppData\Local\Temp\lqpfr"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:3236
- - C:\Users\Admin\AppData\Local\Cocles\antholite.exe
    C:\Users\Admin\AppData\Local\Cocles\antholite.exe /stext "C:\Users\Admin\AppData\Local\Temp\wkuyrfnr"
    3⤵
    - Executes dropped EXE
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:3592
- - C:\Users\Admin\AppData\Local\Cocles\antholite.exe
    C:\Users\Admin\AppData\Local\Cocles\antholite.exe /stext "C:\Users\Admin\AppData\Local\Temp\gmhisyykkjn"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4876

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

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

Replay Monitor

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Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
afa8eaf306f161696e6b78bcc6518b10

SHA1
512df91ff434864c4f4053bfc522215632839800

SHA256
9dd4b15ac0dd46f38defd1feae586db365e6169edda102650987c493aa2d7be4

SHA512
f81e4a1e1e5e77be2fa1b292215ad109c3b278ca6a00a6b0fbaa77e648d8a6a460b1811575d1d2c454d47cf2f1eed9731d19b3e700c6d3607a71e4d3668f0d15

Download Submit
C:\Users\Admin\AppData\Local\Cocles\antholite.exe

Filesize
1.5MB

MD5
bd6420aaf066a5b4533598417866bc67

SHA1
cf56376da61f4f34034fa4cc525e708052a5ecd3

SHA256
b8022e8002a8e01a6364fdcc6d53275b6edf3d196e36f0b4c9645de2570cfd48

SHA512
d9b394fc25949d552b64061810cd4452d24ee473c5755bada25b1db5ad35652a57b545c53c5e1dea88feac376b86e838a6b87886e9ad50e1f582eb2b985cda78

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

Filesize
4KB

MD5
1891919175c888ce82e9bd8a047b01ad

SHA1
502a6892a5d27ecb791ac5aa6d8586944f540453

SHA256
a6c43b4e4b8681cf0ef56c49c730fa77e34dc82db0260253a3ba75039030b9ec

SHA512
8bb940050b1abf6c27db133ed446f41e108f670f361ed5102408832ce33d9b87cd0880723441f1632292eeeb0a319c4e0fac0ea659eb55ebe1130cc3e6c776a3

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

Filesize
140KB

MD5
fc0250799241323e9f3a53f51f7df0f1

SHA1
f0d60dbf33047494014302b4ee8b438cc0380943

SHA256
0469ec50b7420320b46fb0a05c5d875de1ca110b2e18fbcb37860e2a6cd31982

SHA512
ccacaced5eb79a9920299599b34984788c2288bf07ce1a423668c5b4e56f4348cf7a6a29231a658fce07a40719897ee1dde428d4539a8007f6028b243f718661

Download Submit
memory/2060-37-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2060-52-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2060-32-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2060-34-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2060-35-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2060-36-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2060-109-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2060-38-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2060-40-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2060-77-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2060-33-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2060-108-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2060-100-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2060-101-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2060-28-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2060-76-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2060-93-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2060-72-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2060-70-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2060-92-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2060-85-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2060-84-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2060-71-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2060-29-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2060-67-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3236-65-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3236-42-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3236-48-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3236-53-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3236-45-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3592-46-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3592-60-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3592-50-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3592-51-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3592-55-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3972-10-0x0000000003EA0000-0x0000000003EA4000-memory.dmp

Filesize
16KB

Download
memory/4876-63-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4876-62-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4876-58-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download