remcos | e783db94296b76ad76fd327eb96fa7171aaf39265fe91e72a03a78babe1dd734

Analysis

max time kernel
118s
max time network
97s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
27/08/2024, 10:20

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General

Target

02bd0ebaf5baff24369602f3057591e0N.exe
Size

1005KB
MD5

02bd0ebaf5baff24369602f3057591e0
SHA1

e7698ec849ae4a68f90d412b0deedd7af95cfacd
SHA256

e783db94296b76ad76fd327eb96fa7171aaf39265fe91e72a03a78babe1dd734
SHA512

3371187a1f14c9261bf7675a8d748eea42a629114079a930aacbce861d5d694ce8c79030ed1d6e6b9a50beae4bec4576b64b54973bade269f728f075380faee9
SSDEEP

24576:ZWC/qaSu5K+5ImKmirxp9bWJxbcQNB2A+nE2+qOQtEZvpNpifum:oiUuGpmc+lh2ASE2HgHNpi2m

Score

10^/10

remcos aug 20c collection credential_access discovery execution rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

Aug 20C

method8888.ddns.net:6902

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-4ZC3PQ
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 3 IoCs

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

resource	yara_rule
behavioral1/memory/1136-56-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/2344-55-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2868-60-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/1136-56-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/2344-55-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2772	powershell.exe
1164	powershell.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-1-5-21-3294248377-1418901787-4083263181-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	02bd0ebaf5baff24369602f3057591e0N.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2080 set thread context of 3040	2080	02bd0ebaf5baff24369602f3057591e0N.exe	36
PID 3040 set thread context of 2344	3040	02bd0ebaf5baff24369602f3057591e0N.exe	38
PID 3040 set thread context of 1136	3040	02bd0ebaf5baff24369602f3057591e0N.exe	39
PID 3040 set thread context of 2868	3040	02bd0ebaf5baff24369602f3057591e0N.exe	40

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 8 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	02bd0ebaf5baff24369602f3057591e0N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	02bd0ebaf5baff24369602f3057591e0N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	02bd0ebaf5baff24369602f3057591e0N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	02bd0ebaf5baff24369602f3057591e0N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	02bd0ebaf5baff24369602f3057591e0N.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2748	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1164	powershell.exe
2772	powershell.exe
2344	02bd0ebaf5baff24369602f3057591e0N.exe
2344	02bd0ebaf5baff24369602f3057591e0N.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
3040	02bd0ebaf5baff24369602f3057591e0N.exe
3040	02bd0ebaf5baff24369602f3057591e0N.exe
3040	02bd0ebaf5baff24369602f3057591e0N.exe
3040	02bd0ebaf5baff24369602f3057591e0N.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2772	powershell.exe
Token: SeDebugPrivilege	1164	powershell.exe
Token: SeDebugPrivilege	2868	02bd0ebaf5baff24369602f3057591e0N.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3040	02bd0ebaf5baff24369602f3057591e0N.exe

Suspicious use of WriteProcessMemory 44 IoCs

description	pid	Process	procid_target
PID 2080 wrote to memory of 2772	2080	02bd0ebaf5baff24369602f3057591e0N.exe	30
PID 2080 wrote to memory of 2772	2080	02bd0ebaf5baff24369602f3057591e0N.exe	30
PID 2080 wrote to memory of 2772	2080	02bd0ebaf5baff24369602f3057591e0N.exe	30
PID 2080 wrote to memory of 2772	2080	02bd0ebaf5baff24369602f3057591e0N.exe	30
PID 2080 wrote to memory of 1164	2080	02bd0ebaf5baff24369602f3057591e0N.exe	32
PID 2080 wrote to memory of 1164	2080	02bd0ebaf5baff24369602f3057591e0N.exe	32
PID 2080 wrote to memory of 1164	2080	02bd0ebaf5baff24369602f3057591e0N.exe	32
PID 2080 wrote to memory of 1164	2080	02bd0ebaf5baff24369602f3057591e0N.exe	32
PID 2080 wrote to memory of 2748	2080	02bd0ebaf5baff24369602f3057591e0N.exe	33
PID 2080 wrote to memory of 2748	2080	02bd0ebaf5baff24369602f3057591e0N.exe	33
PID 2080 wrote to memory of 2748	2080	02bd0ebaf5baff24369602f3057591e0N.exe	33
PID 2080 wrote to memory of 2748	2080	02bd0ebaf5baff24369602f3057591e0N.exe	33
PID 2080 wrote to memory of 3040	2080	02bd0ebaf5baff24369602f3057591e0N.exe	36
PID 2080 wrote to memory of 3040	2080	02bd0ebaf5baff24369602f3057591e0N.exe	36
PID 2080 wrote to memory of 3040	2080	02bd0ebaf5baff24369602f3057591e0N.exe	36
PID 2080 wrote to memory of 3040	2080	02bd0ebaf5baff24369602f3057591e0N.exe	36
PID 2080 wrote to memory of 3040	2080	02bd0ebaf5baff24369602f3057591e0N.exe	36
PID 2080 wrote to memory of 3040	2080	02bd0ebaf5baff24369602f3057591e0N.exe	36
PID 2080 wrote to memory of 3040	2080	02bd0ebaf5baff24369602f3057591e0N.exe	36
PID 2080 wrote to memory of 3040	2080	02bd0ebaf5baff24369602f3057591e0N.exe	36
PID 2080 wrote to memory of 3040	2080	02bd0ebaf5baff24369602f3057591e0N.exe	36
PID 2080 wrote to memory of 3040	2080	02bd0ebaf5baff24369602f3057591e0N.exe	36
PID 2080 wrote to memory of 3040	2080	02bd0ebaf5baff24369602f3057591e0N.exe	36
PID 2080 wrote to memory of 3040	2080	02bd0ebaf5baff24369602f3057591e0N.exe	36
PID 2080 wrote to memory of 3040	2080	02bd0ebaf5baff24369602f3057591e0N.exe	36
PID 3040 wrote to memory of 1732	3040	02bd0ebaf5baff24369602f3057591e0N.exe	37
PID 3040 wrote to memory of 1732	3040	02bd0ebaf5baff24369602f3057591e0N.exe	37
PID 3040 wrote to memory of 1732	3040	02bd0ebaf5baff24369602f3057591e0N.exe	37
PID 3040 wrote to memory of 1732	3040	02bd0ebaf5baff24369602f3057591e0N.exe	37
PID 3040 wrote to memory of 2344	3040	02bd0ebaf5baff24369602f3057591e0N.exe	38
PID 3040 wrote to memory of 2344	3040	02bd0ebaf5baff24369602f3057591e0N.exe	38
PID 3040 wrote to memory of 2344	3040	02bd0ebaf5baff24369602f3057591e0N.exe	38
PID 3040 wrote to memory of 2344	3040	02bd0ebaf5baff24369602f3057591e0N.exe	38
PID 3040 wrote to memory of 2344	3040	02bd0ebaf5baff24369602f3057591e0N.exe	38
PID 3040 wrote to memory of 1136	3040	02bd0ebaf5baff24369602f3057591e0N.exe	39
PID 3040 wrote to memory of 1136	3040	02bd0ebaf5baff24369602f3057591e0N.exe	39
PID 3040 wrote to memory of 1136	3040	02bd0ebaf5baff24369602f3057591e0N.exe	39
PID 3040 wrote to memory of 1136	3040	02bd0ebaf5baff24369602f3057591e0N.exe	39
PID 3040 wrote to memory of 1136	3040	02bd0ebaf5baff24369602f3057591e0N.exe	39
PID 3040 wrote to memory of 2868	3040	02bd0ebaf5baff24369602f3057591e0N.exe	40
PID 3040 wrote to memory of 2868	3040	02bd0ebaf5baff24369602f3057591e0N.exe	40
PID 3040 wrote to memory of 2868	3040	02bd0ebaf5baff24369602f3057591e0N.exe	40
PID 3040 wrote to memory of 2868	3040	02bd0ebaf5baff24369602f3057591e0N.exe	40
PID 3040 wrote to memory of 2868	3040	02bd0ebaf5baff24369602f3057591e0N.exe	40

C:\Users\Admin\AppData\Local\Temp\02bd0ebaf5baff24369602f3057591e0N.exe
"C:\Users\Admin\AppData\Local\Temp\02bd0ebaf5baff24369602f3057591e0N.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2080
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\02bd0ebaf5baff24369602f3057591e0N.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2772
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\IAVsylTuejD.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1164
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\IAVsylTuejD" /XML "C:\Users\Admin\AppData\Local\Temp\tmp209B.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2748
- C:\Users\Admin\AppData\Local\Temp\02bd0ebaf5baff24369602f3057591e0N.exe
  "C:\Users\Admin\AppData\Local\Temp\02bd0ebaf5baff24369602f3057591e0N.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3040
- - C:\Users\Admin\AppData\Local\Temp\02bd0ebaf5baff24369602f3057591e0N.exe
    C:\Users\Admin\AppData\Local\Temp\02bd0ebaf5baff24369602f3057591e0N.exe /stext "C:\Users\Admin\AppData\Local\Temp\thrlshhfkapwcosgpcdcaszeoettvee"
    3⤵
    PID:1732
- - C:\Users\Admin\AppData\Local\Temp\02bd0ebaf5baff24369602f3057591e0N.exe
    C:\Users\Admin\AppData\Local\Temp\02bd0ebaf5baff24369602f3057591e0N.exe /stext "C:\Users\Admin\AppData\Local\Temp\thrlshhfkapwcosgpcdcaszeoettvee"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:2344
- - C:\Users\Admin\AppData\Local\Temp\02bd0ebaf5baff24369602f3057591e0N.exe
    C:\Users\Admin\AppData\Local\Temp\02bd0ebaf5baff24369602f3057591e0N.exe /stext "C:\Users\Admin\AppData\Local\Temp\dbwdtzzgyihbfugkzfqelxunpsduopvldg"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:1136
- - C:\Users\Admin\AppData\Local\Temp\02bd0ebaf5baff24369602f3057591e0N.exe
    C:\Users\Admin\AppData\Local\Temp\02bd0ebaf5baff24369602f3057591e0N.exe /stext "C:\Users\Admin\AppData\Local\Temp\gwjwuk"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2868

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

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 Information Discovery

T1082

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
5b964dd5f4a3d8fd11717fd839d22ea3

SHA1
b5242d6dc37c7a8c011f575fa838af98a3c50844

SHA256
2653af43edc0e01bd0b05920b6c4aecf95aaf64c3d99df880e34f44c211b7893

SHA512
eebfc925b8ad7cf6955a4ef7e0326d2ec688ca279f0eb374638227e2df96eee8737b7d55e9c0bc25e9014e67da9d83e3b93891bc6dab3332d591ca64a98a00fd

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

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp209B.tmp

Filesize
1KB

MD5
29faba909b89cba2226fbaa9c9fadb3c

SHA1
6f0fd005a5ef91a5d65077f6a93f8b777ec26525

SHA256
0cd32b7f024a7006442ace2731cb9a1a4307bf75122a1fe48b318d0ca1b11b6d

SHA512
165c88b5cddf60b4a380c72df72a99e1cae89718d05a3370842f886a8be90b17a6f9bef19d1d43be6d2d991370bcd38ad27cacfda6cf7c8bb8c047d978acfcc6

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\SUGFZGKVN05PY9GDSH8S.temp

Filesize
7KB

MD5
457624dd1b8bcc4d8267054f5f3a56bf

SHA1
2383421bfc366a3eea9326397df96f356801948a

SHA256
0633af050ec37f8562b7f712ec7a2ec14201ad514d3966761cd6f960fd819648

SHA512
122b453161e0957b0dd9803f082eb0e9ba5763886164d8a145bf4eca7e213a87e248aaeca68f7d0db825447b89d9c2a9d3e21cd07a31004ec3897170c775269c

Download Submit
memory/1136-56-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1136-54-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1136-52-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2080-5-0x0000000005290000-0x0000000005350000-memory.dmp

Filesize
768KB

Download
memory/2080-4-0x0000000000450000-0x0000000000460000-memory.dmp

Filesize
64KB

Download
memory/2080-41-0x00000000740A0000-0x000000007478E000-memory.dmp

Filesize
6.9MB

Download
memory/2080-3-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2080-0-0x00000000740AE000-0x00000000740AF000-memory.dmp

Filesize
4KB

Download
memory/2080-2-0x00000000740A0000-0x000000007478E000-memory.dmp

Filesize
6.9MB

Download
memory/2080-1-0x00000000012E0000-0x00000000013DE000-memory.dmp

Filesize
1016KB

Download
memory/2344-50-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2344-53-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2344-55-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2868-60-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2868-59-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2868-58-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3040-36-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3040-30-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3040-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3040-43-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3040-44-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3040-45-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3040-46-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3040-48-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3040-18-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3040-42-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3040-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3040-26-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3040-29-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3040-34-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/3040-33-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3040-35-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3040-37-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3040-40-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3040-67-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3040-71-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3040-70-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3040-72-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3040-76-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3040-77-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3040-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3040-84-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3040-92-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3040-93-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download