remcos | cda34c7ddc45a0ac67f0f3745b91686c285bc86f108c5c2deb36c1c3a0fb5a4f

Analysis

max time kernel
148s
max time network
121s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
03/09/2024, 04:17

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General

Target

NtOl.exe
Size

1.0MB
MD5

6aa8b2797c962a2bfbed78a30afa3f4a
SHA1

1c76e253db167d7c6a685282973c1bc80bbe8e5e
SHA256

cda34c7ddc45a0ac67f0f3745b91686c285bc86f108c5c2deb36c1c3a0fb5a4f
SHA512

ce9ba1c1282e0d87665bbe27749106de3c42ee7b2bc9e741586ad643129c01f2c7421d1afc98b599568c4fd1e229fcf08d19503426b6507db6f45e222903b145
SSDEEP

24576:0HH6h1OoaYANm0loL58KwewFARcqlE3r9HMQKw:k8t0loL58KwLgQ7lMQKw

Score

10^/10

remcos aug 19.2 collection credential_access discovery execution rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

Aug 19.2

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-U6KI2M
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/484-61-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/300-59-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/892-56-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/300-59-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/892-56-0x0000000000400000-0x0000000000478000-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
2604	powershell.exe
3004	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	NtOl.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2680 set thread context of 848	2680	NtOl.exe	37
PID 848 set thread context of 892	848	NtOl.exe	38
PID 848 set thread context of 300	848	NtOl.exe	39
PID 848 set thread context of 484	848	NtOl.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	powershell.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	NtOl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	NtOl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	NtOl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	NtOl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	NtOl.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
3008	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3004	powershell.exe
2604	powershell.exe
892	NtOl.exe
892	NtOl.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
848	NtOl.exe
848	NtOl.exe
848	NtOl.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3004	powershell.exe
Token: SeDebugPrivilege	2604	powershell.exe
Token: SeDebugPrivilege	484	NtOl.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
848	NtOl.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 2680 wrote to memory of 2604	2680	NtOl.exe	31
PID 2680 wrote to memory of 2604	2680	NtOl.exe	31
PID 2680 wrote to memory of 2604	2680	NtOl.exe	31
PID 2680 wrote to memory of 2604	2680	NtOl.exe	31
PID 2680 wrote to memory of 3004	2680	NtOl.exe	33
PID 2680 wrote to memory of 3004	2680	NtOl.exe	33
PID 2680 wrote to memory of 3004	2680	NtOl.exe	33
PID 2680 wrote to memory of 3004	2680	NtOl.exe	33
PID 2680 wrote to memory of 3008	2680	NtOl.exe	34
PID 2680 wrote to memory of 3008	2680	NtOl.exe	34
PID 2680 wrote to memory of 3008	2680	NtOl.exe	34
PID 2680 wrote to memory of 3008	2680	NtOl.exe	34
PID 2680 wrote to memory of 848	2680	NtOl.exe	37
PID 2680 wrote to memory of 848	2680	NtOl.exe	37
PID 2680 wrote to memory of 848	2680	NtOl.exe	37
PID 2680 wrote to memory of 848	2680	NtOl.exe	37
PID 2680 wrote to memory of 848	2680	NtOl.exe	37
PID 2680 wrote to memory of 848	2680	NtOl.exe	37
PID 2680 wrote to memory of 848	2680	NtOl.exe	37
PID 2680 wrote to memory of 848	2680	NtOl.exe	37
PID 2680 wrote to memory of 848	2680	NtOl.exe	37
PID 2680 wrote to memory of 848	2680	NtOl.exe	37
PID 2680 wrote to memory of 848	2680	NtOl.exe	37
PID 2680 wrote to memory of 848	2680	NtOl.exe	37
PID 2680 wrote to memory of 848	2680	NtOl.exe	37
PID 848 wrote to memory of 892	848	NtOl.exe	38
PID 848 wrote to memory of 892	848	NtOl.exe	38
PID 848 wrote to memory of 892	848	NtOl.exe	38
PID 848 wrote to memory of 892	848	NtOl.exe	38
PID 848 wrote to memory of 892	848	NtOl.exe	38
PID 848 wrote to memory of 300	848	NtOl.exe	39
PID 848 wrote to memory of 300	848	NtOl.exe	39
PID 848 wrote to memory of 300	848	NtOl.exe	39
PID 848 wrote to memory of 300	848	NtOl.exe	39
PID 848 wrote to memory of 300	848	NtOl.exe	39
PID 848 wrote to memory of 484	848	NtOl.exe	40
PID 848 wrote to memory of 484	848	NtOl.exe	40
PID 848 wrote to memory of 484	848	NtOl.exe	40
PID 848 wrote to memory of 484	848	NtOl.exe	40
PID 848 wrote to memory of 484	848	NtOl.exe	40

C:\Users\Admin\AppData\Local\Temp\NtOl.exe
"C:\Users\Admin\AppData\Local\Temp\NtOl.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2680
- 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\NtOl.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2604
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\GIxoePCFR.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3004
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GIxoePCFR" /XML "C:\Users\Admin\AppData\Local\Temp\tmp22DC.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:3008
- C:\Users\Admin\AppData\Local\Temp\NtOl.exe
  "C:\Users\Admin\AppData\Local\Temp\NtOl.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:848
- - C:\Users\Admin\AppData\Local\Temp\NtOl.exe
    C:\Users\Admin\AppData\Local\Temp\NtOl.exe /stext "C:\Users\Admin\AppData\Local\Temp\uxxlkxxq"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:892
- - C:\Users\Admin\AppData\Local\Temp\NtOl.exe
    C:\Users\Admin\AppData\Local\Temp\NtOl.exe /stext "C:\Users\Admin\AppData\Local\Temp\wsdwkpirdgh"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:300
- - C:\Users\Admin\AppData\Local\Temp\NtOl.exe
    C:\Users\Admin\AppData\Local\Temp\NtOl.exe /stext "C:\Users\Admin\AppData\Local\Temp\huqolitlzozvunk"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:484

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
ccce64c5e2e64ba5382ea0e42081f1ee

SHA1
155ada608ddfb4a22386a38e6d2a8b43caa72cff

SHA256
2cb7b54c850b4f4c3be0c7cd1ea8ebd220b03e25dca74c000298f80d804168a5

SHA512
7f238114240bd8bc80b6586a69ba7313c64e10e412adcce6593e2537bf58499ff4b6ff32484030e9268365c44cfdc744f78ab37a66d9c1d05d62858ea1fc1026

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp22DC.tmp

Filesize
1KB

MD5
cf9943336ed40670e5d55f1450062964

SHA1
311fdcadf7e76df3d27d6fc63ce26d2fe422fc2c

SHA256
0daeb93981cd42ea6a57d73c05b2c5d11b976409ca42bf0136311cdef9b80b6e

SHA512
3db555bc78c3df39d782bce193d1510add8fa9d79b5b7ece43a94ac797b438ee9dc3c7bb9334f69864350ef64d3ce673ce64672666952e930e4a6fc3f30777a7

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

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

Filesize
7KB

MD5
39dcaa23f2386dade0a0a03dbd494d8f

SHA1
6a75feb1da1720b15d287ff2b15aaef02f15df17

SHA256
91db3cda87883ef41ffffc813c782e516efc069f9b7949a15527a7e2916d54de

SHA512
d64bf7aa8bbc6c82854b2bdc062fe86a100a7626bacd43327f535500da672d2193f29e95d35fa67d125e487952df55701993effbc40bb767f067fde3f333c436

Download Submit
memory/300-53-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/300-55-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/300-59-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/484-57-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/484-58-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/484-60-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/484-61-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/848-28-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/848-44-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/848-30-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/848-36-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/848-41-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/848-38-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/848-37-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/848-35-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/848-33-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/848-32-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/848-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/848-93-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/848-43-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/848-68-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/848-45-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/848-46-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/848-47-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/848-49-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/848-92-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/848-84-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/848-23-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/848-21-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/848-19-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/848-77-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/848-76-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/848-73-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/848-71-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/848-72-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/892-54-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/892-56-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/892-51-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2680-2-0x00000000745D0000-0x0000000074CBE000-memory.dmp

Filesize
6.9MB

Download
memory/2680-3-0x0000000000590000-0x00000000005A2000-memory.dmp

Filesize
72KB

Download
memory/2680-4-0x00000000745D0000-0x0000000074CBE000-memory.dmp

Filesize
6.9MB

Download
memory/2680-5-0x00000000005A0000-0x00000000005B0000-memory.dmp

Filesize
64KB

Download
memory/2680-6-0x00000000052C0000-0x0000000005380000-memory.dmp

Filesize
768KB

Download
memory/2680-1-0x0000000000870000-0x0000000000978000-memory.dmp

Filesize
1.0MB

Download
memory/2680-0-0x00000000745DE000-0x00000000745DF000-memory.dmp

Filesize
4KB

Download
memory/2680-42-0x00000000745D0000-0x0000000074CBE000-memory.dmp

Filesize
6.9MB

Download