remcos | 105d2d63ad642a68e636c975bac2b5b60cd76ecb684d6c4a85fa6562d48f0de8

General

Target

Invoice and packing list (021)_pdf.exe
Size

482KB
MD5

e5f62262b9f4ee67ffb7c15ebe428a89
SHA1

b037adae7507ab9103ca5d30d62302c973352d6f
SHA256

105d2d63ad642a68e636c975bac2b5b60cd76ecb684d6c4a85fa6562d48f0de8
SHA512

5e6508a0b6ebf3633cace9b084a5bac98f77021564b62a503e9f22b4e6debfd7f0fb653150b96fd7e39a04c59fc3ef33e9bfebef4882a95cf5acca3e78c1587a
SSDEEP

6144:7Tz+c6KHYBhDc1RGJdv//NkUn+N5Bkf/0TELRvIZPjbsAOZZmAX4crKT4:7TlrYw1RUh3NFn+N5WfIQIjbs/ZmBT4

Score

10^/10

remcos remotehost collection discovery rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

stinosa.duckdns.org: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-XF3AOC
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
true
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/4548-9-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4548-14-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4548-19-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/676-17-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/676-13-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/676-12-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/3320-21-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/3320-26-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/676-17-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/676-13-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/676-12-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/3320-21-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/3320-26-0x0000000000400000-0x0000000000478000-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-1-5-21-945322488-2060912225-3527527000-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	Invoice and packing list (021)_pdf.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 3492 set thread context of 3320	3492	Invoice and packing list (021)_pdf.exe	82
PID 3492 set thread context of 676	3492	Invoice and packing list (021)_pdf.exe	83
PID 3492 set thread context of 4548	3492	Invoice and packing list (021)_pdf.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	Invoice and packing list (021)_pdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Invoice and packing list (021)_pdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Invoice and packing list (021)_pdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Invoice and packing list (021)_pdf.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4548	Invoice and packing list (021)_pdf.exe
4548	Invoice and packing list (021)_pdf.exe
3320	Invoice and packing list (021)_pdf.exe
3320	Invoice and packing list (021)_pdf.exe
3320	Invoice and packing list (021)_pdf.exe
3320	Invoice and packing list (021)_pdf.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3492	Invoice and packing list (021)_pdf.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
3492	Invoice and packing list (021)_pdf.exe
3492	Invoice and packing list (021)_pdf.exe
3492	Invoice and packing list (021)_pdf.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4548	Invoice and packing list (021)_pdf.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3492	Invoice and packing list (021)_pdf.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3492 wrote to memory of 3320	3492	Invoice and packing list (021)_pdf.exe	82
PID 3492 wrote to memory of 3320	3492	Invoice and packing list (021)_pdf.exe	82
PID 3492 wrote to memory of 3320	3492	Invoice and packing list (021)_pdf.exe	82
PID 3492 wrote to memory of 676	3492	Invoice and packing list (021)_pdf.exe	83
PID 3492 wrote to memory of 676	3492	Invoice and packing list (021)_pdf.exe	83
PID 3492 wrote to memory of 676	3492	Invoice and packing list (021)_pdf.exe	83
PID 3492 wrote to memory of 4548	3492	Invoice and packing list (021)_pdf.exe	84
PID 3492 wrote to memory of 4548	3492	Invoice and packing list (021)_pdf.exe	84
PID 3492 wrote to memory of 4548	3492	Invoice and packing list (021)_pdf.exe	84

C:\Users\Admin\AppData\Local\Temp\Invoice and packing list (021)_pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Invoice and packing list (021)_pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3492
- C:\Users\Admin\AppData\Local\Temp\Invoice and packing list (021)_pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Invoice and packing list (021)_pdf.exe" /stext "C:\Users\Admin\AppData\Local\Temp\lwpylujimaovidwzshe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:3320
- C:\Users\Admin\AppData\Local\Temp\Invoice and packing list (021)_pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Invoice and packing list (021)_pdf.exe" /stext "C:\Users\Admin\AppData\Local\Temp\wyurmnukzigikjkdbsrote"
  2⤵
  - Accesses Microsoft Outlook accounts
  - System Location Discovery: System Language Discovery
  PID:676
- C:\Users\Admin\AppData\Local\Temp\Invoice and packing list (021)_pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Invoice and packing list (021)_pdf.exe" /stext "C:\Users\Admin\AppData\Local\Temp\gsajnfndnqynvxhhsceqwissx"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4548

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
bde98da3db26653cddd892b5c1e8c23a

SHA1
06bfa18b89981b586b08236ba8aa4dff284b39d2

SHA256
aa82147e42a4e05cbeac40db88fda8d18ad577f78ecc39d439a1672265907c65

SHA512
38ea6f0e506b0f9f977eb49c59359f44e1451aed2434f0702d74f531a0e0fb3420eecd443e979a1d17743bf0123e6d010035954d4c67bd64e6b956c6046e047f

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

Filesize
4KB

MD5
18db1829b27eaeed163c211f5d179d72

SHA1
4442332494cba1e012f8876ecac42126ba995bc6

SHA256
610c5ee3f0e63441521d26bc477c9618a4c5f86e93d31b31890680c69e3ecc3d

SHA512
123d68b2c84f7a52d15faa212c06f33b04a55585e2aeb16bb14df95b18c0bcf31933e5bf0c736c90bc054b9527fccb046540d3302a0f149ebeed7c6bcca0b986

Download Submit
memory/676-4-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/676-17-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/676-13-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/676-12-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/676-11-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3320-21-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3320-3-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3320-8-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3320-15-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3320-26-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3492-39-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3492-32-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3492-38-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3492-33-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3492-29-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3492-34-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3492-35-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4548-19-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4548-5-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4548-7-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4548-14-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4548-9-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download

Analysis

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