remcos | fc5a104616191074e73ca74e64056c26e129b75395e57257eebf629772200d21

General

Target

1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe
Size

469KB
MD5

c42b1e2c4f831723e13fa9fcfe26be96
SHA1

0cdce2551a12c15df38d10c532f3af640f5f7fd8
SHA256

fc5a104616191074e73ca74e64056c26e129b75395e57257eebf629772200d21
SHA512

78a7f391392a51722af4ee0569fe90cb7acb4b528ee72900c449f022262c3f70dfe38783397e8854f553e9365cac8672654b9ebe327103ea7ef1e48e337c9dde
SSDEEP

12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQS0n9:uiLJbpI7I2WhQqZ709

Score

10^/10

remcos octobers collection discovery rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

OCTOBERS

C2

ab9001.ddns.net:23782

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
VLC.exe
copy_folder
VLC
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
Chrorne-28R56P
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Rmc
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 10 IoCs

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

resource	yara_rule
behavioral1/memory/2520-16-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2540-17-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft
behavioral1/memory/2540-15-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft
behavioral1/memory/2520-14-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2584-22-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/2584-23-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/2584-27-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/2520-32-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2540-36-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft
behavioral1/memory/2540-37-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft

NirSoft MailPassView 4 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/2540-17-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView
behavioral1/memory/2540-15-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView
behavioral1/memory/2540-36-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView
behavioral1/memory/2540-37-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/2520-16-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/2520-14-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/2520-32-0x0000000000400000-0x0000000000478000-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-1-5-21-457978338-2990298471-2379561640-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2988 set thread context of 2760	2988	1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe	30
PID 2988 set thread context of 2520	2988	1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe	32
PID 2988 set thread context of 2540	2988	1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe	33
PID 2988 set thread context of 2584	2988	1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe	34

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	1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2520	1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe
2520	1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
2988	1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe
2988	1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe
2988	1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe
2988	1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2584	1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2988	1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 2988 wrote to memory of 2760	2988	1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe	30
PID 2988 wrote to memory of 2760	2988	1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe	30
PID 2988 wrote to memory of 2760	2988	1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe	30
PID 2988 wrote to memory of 2760	2988	1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe	30
PID 2988 wrote to memory of 2760	2988	1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe	30
PID 2988 wrote to memory of 2520	2988	1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe	32
PID 2988 wrote to memory of 2520	2988	1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe	32
PID 2988 wrote to memory of 2520	2988	1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe	32
PID 2988 wrote to memory of 2520	2988	1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe	32
PID 2988 wrote to memory of 2540	2988	1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe	33
PID 2988 wrote to memory of 2540	2988	1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe	33
PID 2988 wrote to memory of 2540	2988	1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe	33
PID 2988 wrote to memory of 2540	2988	1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe	33
PID 2988 wrote to memory of 2584	2988	1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe	34
PID 2988 wrote to memory of 2584	2988	1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe	34
PID 2988 wrote to memory of 2584	2988	1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe	34
PID 2988 wrote to memory of 2584	2988	1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe	34

C:\Users\Admin\AppData\Local\Temp\1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe
"C:\Users\Admin\AppData\Local\Temp\1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2988
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  PID:2760
- C:\Users\Admin\AppData\Local\Temp\1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe
  C:\Users\Admin\AppData\Local\Temp\1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe /stext "C:\Users\Admin\AppData\Local\Temp\jpidqlojwsir"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:2520
- C:\Users\Admin\AppData\Local\Temp\1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe
  C:\Users\Admin\AppData\Local\Temp\1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe /stext "C:\Users\Admin\AppData\Local\Temp\ujnordzdkaaefjt"
  2⤵
  - Accesses Microsoft Outlook accounts
  - System Location Discovery: System Language Discovery
  PID:2540
- C:\Users\Admin\AppData\Local\Temp\1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe
  C:\Users\Admin\AppData\Local\Temp\1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe /stext "C:\Users\Admin\AppData\Local\Temp\wmshrwkeyisippirlqo"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:2584

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
c690b20decd27ab645834ed4447123d0

SHA1
a30750ee108b946977c34e2a233d3f4103749a2a

SHA256
f16618a1f7a5f12a1034aa69286cb29571fe6753943c844eeef2421425300df3

SHA512
772beb5aab4152f5dac2c515e9a23be979ec085a4502595c68828d8a158ff04a2356f8b7c97cc0cbe8c252431195b0a72088d109b200705fe3e08740445c4e94

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

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
memory/2520-14-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2520-32-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2520-9-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2520-16-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2520-11-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2540-13-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/2540-36-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/2540-15-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/2540-12-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/2540-17-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/2540-37-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/2584-18-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2584-21-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2584-20-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2584-22-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2584-23-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2584-24-0x0000000000430000-0x0000000000497000-memory.dmp

Filesize
412KB

Download
memory/2584-27-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2760-2-0x0000000000080000-0x00000000000FF000-memory.dmp

Filesize
508KB

Download
memory/2760-4-0x0000000000080000-0x00000000000FF000-memory.dmp

Filesize
508KB

Download
memory/2760-5-0x0000000000080000-0x00000000000FF000-memory.dmp

Filesize
508KB

Download
memory/2760-0-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download

Analysis

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