remcos | fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43

General

Target

fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe
Size

483KB
MD5

e48b33738a13a98bef014ab19cbc0849
SHA1

35bd77e176afc9931421d34d627f4d9453ed83c6
SHA256

fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43
SHA512

a99a9bdaa083dac7d41b7e42073d7dd84efa8523af48bea85e33d6aaf09e1dbea609ad1d66a27287d499041cf17fdcd11db28c8f4c9e330a5dc7e23d35cd9e01
SSDEEP

6144:QTz+c6KHYBhDc1RGJPv//NkUn+N5Bkf/0TELRvIZPjbsAOZZXAXkcrHT4:QTlrYw1RU33NFn+N5WfIQIjbs/ZXkT4

Score

10^/10

remcos remotehost collection discovery rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

ramcxx.duckdns.org:50312

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-M3P7YT
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/3944-9-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4112-19-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/972-24-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/972-17-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/972-16-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4112-8-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/3944-15-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4112-26-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/3944-9-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/3944-15-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/4112-19-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/4112-8-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/4112-26-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2412658365-3084825385-3340777666-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4968 set thread context of 4112	4968	fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe	82
PID 4968 set thread context of 3944	4968	fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe	83
PID 4968 set thread context of 972	4968	fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe	84

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	fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4112	fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe
4112	fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe
972	fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe
972	fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe
4112	fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe
4112	fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
4968	fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe
4968	fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe
4968	fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	972	fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4968	fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4968 wrote to memory of 4112	4968	fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe	82
PID 4968 wrote to memory of 4112	4968	fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe	82
PID 4968 wrote to memory of 4112	4968	fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe	82
PID 4968 wrote to memory of 3944	4968	fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe	83
PID 4968 wrote to memory of 3944	4968	fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe	83
PID 4968 wrote to memory of 3944	4968	fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe	83
PID 4968 wrote to memory of 972	4968	fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe	84
PID 4968 wrote to memory of 972	4968	fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe	84
PID 4968 wrote to memory of 972	4968	fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe	84

C:\Users\Admin\AppData\Local\Temp\fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe
"C:\Users\Admin\AppData\Local\Temp\fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4968
- C:\Users\Admin\AppData\Local\Temp\fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe
  C:\Users\Admin\AppData\Local\Temp\fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe /stext "C:\Users\Admin\AppData\Local\Temp\rwdgyjpbceycwhleuesy"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:4112
- C:\Users\Admin\AppData\Local\Temp\fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe
  C:\Users\Admin\AppData\Local\Temp\fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe /stext "C:\Users\Admin\AppData\Local\Temp\tyiyzbhvqnqhynzilpnzhjg"
  2⤵
  - Accesses Microsoft Outlook accounts
  - System Location Discovery: System Language Discovery
  PID:3944
- C:\Users\Admin\AppData\Local\Temp\fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe
  C:\Users\Admin\AppData\Local\Temp\fbd8feb952fb3452131ddf54096bcb0c704a3e3f45177aade5751b3395a5bb43.exe /stext "C:\Users\Admin\AppData\Local\Temp\dswjausxmviuitvuuaztsobyxi"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:972

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
68ff20ad10944eaa526a5a3d3d5225a2

SHA1
22f5b8297ef39d3bb8d2b9826a38e5c335031248

SHA256
2446be7d9af13134b8f63bb334ab14a7478cf481ff4803680f66dcdf5418f941

SHA512
a00a46ac92d4535055bbbd815908350b16b92def21f4c4f7fe30d2d0a6dec28b631b59104cc0e71c51b9e87506854dcb5845c3312d009a963a228511765a6f53

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

Filesize
4KB

MD5
c0ab2847671ed5375328c5127a02cc72

SHA1
dc2bcb51562fb17e5c8787833bc0181d88a5b75e

SHA256
e961f466a0638bc99182d0056245e2d8bf1ccc13a189b802aada981f379e2384

SHA512
0b8b634d21ac71e02cef86687bf84b6fcecfd24dafab8130f42ce8b4b3f308a2e1b1fa7bf8d37f2eda76efae2b30b8d39f41d808d771562d8545ed144241924f

Download Submit
memory/972-12-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/972-10-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/972-22-0x0000000000430000-0x00000000004F9000-memory.dmp

Filesize
804KB

Download
memory/972-24-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/972-17-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/972-16-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3944-6-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3944-15-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3944-9-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3944-7-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4112-1-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4112-19-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4112-26-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4112-8-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4112-5-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4968-29-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4968-32-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4968-33-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4968-34-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4968-35-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4968-38-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4968-39-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download

Analysis

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