remcos | 36b031ed98740c17e160aad1221d834266cecc5711db159371e20ca42195617c

Analysis

max time kernel
149s
max time network
131s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
18-09-2024 08:15

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General

Target

RFQ09_pdf.exe
Size

1.7MB
MD5

86a674b2eb3eabf83cbbecf18ced3235
SHA1

3d22d82a9aa4b04e24a9c0d2405ad7a46b444b97
SHA256

31b239f58d0aae8feff955aa3aa2d6766da23c10bd61f8b9644e38d373e6ab0e
SHA512

d1e97151aa799b61495c3db6083ce617f1df2b31323424e20fb706334e3ecb72631e1cc33574705942ebd0191a11f0a3ed49b64d0e559dd5cd0ab4613b00714a
SSDEEP

49152:7JZoQrbTFZY1iaCoUtVKzCaKIwo2pkj0l2+oN2iS79:7trbTA1T2ILQpl24Z9

Score

10^/10

remcos remotehost collection credential_access discovery rat stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

154.216.18.214:2404

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-AOD6MB
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
behavioral2/memory/1400-27-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/2300-26-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/1400-22-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/1712-30-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/2300-21-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/1400-32-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/2300-26-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/2300-21-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/1400-27-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/1400-22-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/1400-32-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-523280732-2327480845-3730041215-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	svchost.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 1308 set thread context of 4600	1308	RFQ09_pdf.exe	82
PID 4600 set thread context of 1400	4600	svchost.exe	90
PID 4600 set thread context of 2300	4600	svchost.exe	91
PID 4600 set thread context of 1712	4600	svchost.exe	93

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4444	1308	WerFault.exe	81

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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RFQ09_pdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1400	svchost.exe
1400	svchost.exe
1712	svchost.exe
1712	svchost.exe
1400	svchost.exe
1400	svchost.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
1308	RFQ09_pdf.exe
4600	svchost.exe
4600	svchost.exe
4600	svchost.exe
4600	svchost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1712	svchost.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1308 wrote to memory of 4600	1308	RFQ09_pdf.exe	82
PID 1308 wrote to memory of 4600	1308	RFQ09_pdf.exe	82
PID 1308 wrote to memory of 4600	1308	RFQ09_pdf.exe	82
PID 1308 wrote to memory of 4600	1308	RFQ09_pdf.exe	82
PID 4600 wrote to memory of 1400	4600	svchost.exe	90
PID 4600 wrote to memory of 1400	4600	svchost.exe	90
PID 4600 wrote to memory of 1400	4600	svchost.exe	90
PID 4600 wrote to memory of 1400	4600	svchost.exe	90
PID 4600 wrote to memory of 2300	4600	svchost.exe	91
PID 4600 wrote to memory of 2300	4600	svchost.exe	91
PID 4600 wrote to memory of 2300	4600	svchost.exe	91
PID 4600 wrote to memory of 2300	4600	svchost.exe	91
PID 4600 wrote to memory of 2164	4600	svchost.exe	92
PID 4600 wrote to memory of 2164	4600	svchost.exe	92
PID 4600 wrote to memory of 2164	4600	svchost.exe	92
PID 4600 wrote to memory of 1712	4600	svchost.exe	93
PID 4600 wrote to memory of 1712	4600	svchost.exe	93
PID 4600 wrote to memory of 1712	4600	svchost.exe	93
PID 4600 wrote to memory of 1712	4600	svchost.exe	93

C:\Users\Admin\AppData\Local\Temp\RFQ09_pdf.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ09_pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1308
- C:\Windows\SysWOW64\svchost.exe
  "C:\Users\Admin\AppData\Local\Temp\RFQ09_pdf.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:4600
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\qkmlzphaewheqlkwcbhuxzkrhbaukqq"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:1400
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\tezwahsusezjbahitmuoaefiqhsdlbhpea"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:2300
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\dgeoba"
    3⤵
    PID:2164
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\dgeoba"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1712
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1308 -s 744
  2⤵
  - Program crash
  PID:4444

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1308 -ip 1308
1⤵
PID:2416

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 Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\qkmlzphaewheqlkwcbhuxzkrhbaukqq

Filesize
4KB

MD5
8b8277c8f03c24d1f290dbe476e961d2

SHA1
2e13baf3a4b708277d550dc3dd1e0f99b131f78e

SHA256
9af6881f6dbffba028a7a977f4c0a43c764f840332986993ad66de7b816c2f9e

SHA512
7367a0236cd0d6cd731caf1ba1f4ea8f851ea1018a9c6b49db6e9d13b2aaba92767774da9169481918e4287021ff5c3a58c3143eaa5e7fe9fa88383208615948

Download Submit
memory/1308-2-0x00000000044D0000-0x00000000048D0000-memory.dmp

Filesize
4.0MB

Download
memory/1400-20-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1400-15-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1400-22-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1400-32-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1400-27-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1712-30-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1712-28-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1712-29-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2300-21-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2300-26-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2300-19-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2300-17-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4600-11-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4600-34-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4600-12-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4600-10-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4600-9-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4600-8-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4600-7-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4600-6-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4600-5-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4600-3-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4600-4-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4600-14-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4600-38-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4600-37-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4600-39-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4600-40-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4600-42-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4600-41-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4600-44-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4600-43-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4600-45-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4600-46-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4600-47-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4600-48-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download