remcos | 98285bfa23f62cf1b41d1b69e201b55c105d662e2dd717b0722281a94c830935

Analysis

max time kernel
149s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
25-08-2024 01:14

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General

Target

3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe
Size

998KB
MD5

3dfaa19b28b0bf28e10d070e59256bf2
SHA1

fa85c2be5bebefa81a7b6d1c6ce4d3f67c134a97
SHA256

3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15
SHA512

acaa68698294c684acfbd2b6db4a5a1551588d1708f3870488a8c19d44784cbb0f85355e9f18b1dd530eec109720a79720d6f6f2f28b86a81d54fa66e3c1a834
SSDEEP

24576:gEC/qaSutZ+2gbrpVG2QDbtcPUUBIyHTTEbHkvszK:ViUutZAbrpVubGPRBIyHTuH

Score

10^/10

remcos remotehost collection credential_access discovery rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

103.198.26.25:96

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-IPUJM4
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 6 IoCs

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

resource	yara_rule
behavioral2/memory/1672-36-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/2364-35-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/1672-33-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/2364-32-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/1672-40-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/2364-42-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/1672-36-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/1672-33-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/1672-40-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/2364-35-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/2364-32-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/2364-42-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

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-1-5-21-523280732-2327480845-3730041215-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2328 set thread context of 2780	2328	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe	97
PID 2780 set thread context of 2364	2780	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe	99
PID 2780 set thread context of 1672	2780	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe	100
PID 2780 set thread context of 5088	2780	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe	101

Program crash 1 IoCs

pid	pid_target	Process	procid_target
912	5088	WerFault.exe	101

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	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2328	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe
2328	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe
2364	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe
2364	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe
2364	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe
2364	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
2780	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe
2780	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe
2780	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe
2780	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2328	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe

Suspicious use of UnmapMainImage 1 IoCs

pid	Process
5088	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2328 wrote to memory of 3784	2328	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe	96
PID 2328 wrote to memory of 3784	2328	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe	96
PID 2328 wrote to memory of 3784	2328	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe	96
PID 2328 wrote to memory of 2780	2328	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe	97
PID 2328 wrote to memory of 2780	2328	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe	97
PID 2328 wrote to memory of 2780	2328	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe	97
PID 2328 wrote to memory of 2780	2328	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe	97
PID 2328 wrote to memory of 2780	2328	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe	97
PID 2328 wrote to memory of 2780	2328	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe	97
PID 2328 wrote to memory of 2780	2328	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe	97
PID 2328 wrote to memory of 2780	2328	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe	97
PID 2328 wrote to memory of 2780	2328	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe	97
PID 2328 wrote to memory of 2780	2328	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe	97
PID 2328 wrote to memory of 2780	2328	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe	97
PID 2328 wrote to memory of 2780	2328	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe	97
PID 2780 wrote to memory of 3196	2780	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe	98
PID 2780 wrote to memory of 3196	2780	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe	98
PID 2780 wrote to memory of 3196	2780	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe	98
PID 2780 wrote to memory of 2364	2780	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe	99
PID 2780 wrote to memory of 2364	2780	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe	99
PID 2780 wrote to memory of 2364	2780	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe	99
PID 2780 wrote to memory of 2364	2780	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe	99
PID 2780 wrote to memory of 1672	2780	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe	100
PID 2780 wrote to memory of 1672	2780	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe	100
PID 2780 wrote to memory of 1672	2780	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe	100
PID 2780 wrote to memory of 1672	2780	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe	100
PID 2780 wrote to memory of 5088	2780	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe	101
PID 2780 wrote to memory of 5088	2780	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe	101
PID 2780 wrote to memory of 5088	2780	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe	101
PID 2780 wrote to memory of 5088	2780	3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe	101

C:\Users\Admin\AppData\Local\Temp\3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe
"C:\Users\Admin\AppData\Local\Temp\3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2328
- C:\Users\Admin\AppData\Local\Temp\3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe
  "C:\Users\Admin\AppData\Local\Temp\3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe"
  2⤵
  PID:3784
- C:\Users\Admin\AppData\Local\Temp\3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe
  "C:\Users\Admin\AppData\Local\Temp\3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:2780
- - C:\Users\Admin\AppData\Local\Temp\3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe
    C:\Users\Admin\AppData\Local\Temp\3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe /stext "C:\Users\Admin\AppData\Local\Temp\bwdmbbiyevcwdodyitrosthyaqh"
    3⤵
    PID:3196
- - C:\Users\Admin\AppData\Local\Temp\3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe
    C:\Users\Admin\AppData\Local\Temp\3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe /stext "C:\Users\Admin\AppData\Local\Temp\bwdmbbiyevcwdodyitrosthyaqh"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:2364
- - C:\Users\Admin\AppData\Local\Temp\3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe
    C:\Users\Admin\AppData\Local\Temp\3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe /stext "C:\Users\Admin\AppData\Local\Temp\dzjxcttrseubnurcreepvgtpjwqcsk"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:1672
- - C:\Users\Admin\AppData\Local\Temp\3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe
    C:\Users\Admin\AppData\Local\Temp\3a4cfc46e94f08076d2ada85e0d51cf06695bfb54ad5f37c316c70d582839d15.exe /stext "C:\Users\Admin\AppData\Local\Temp\ntwpdmdtgmmfqingioyjgloyslidlnntv"
    3⤵
    - Suspicious use of UnmapMainImage
    PID:5088
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 5088 -s 12
      4⤵
      Program crash
      PID:912

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 5088 -ip 5088
1⤵
PID:3504

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

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 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:\Users\Admin\AppData\Local\Temp\bwdmbbiyevcwdodyitrosthyaqh

Filesize
4KB

MD5
8b8277c8f03c24d1f290dbe476e961d2

SHA1
2e13baf3a4b708277d550dc3dd1e0f99b131f78e

SHA256
9af6881f6dbffba028a7a977f4c0a43c764f840332986993ad66de7b816c2f9e

SHA512
7367a0236cd0d6cd731caf1ba1f4ea8f851ea1018a9c6b49db6e9d13b2aaba92767774da9169481918e4287021ff5c3a58c3143eaa5e7fe9fa88383208615948

Download Submit
memory/1672-36-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1672-33-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1672-31-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1672-28-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1672-40-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2328-6-0x0000000005490000-0x00000000054A2000-memory.dmp

Filesize
72KB

Download
memory/2328-5-0x0000000074ED0000-0x0000000075680000-memory.dmp

Filesize
7.7MB

Download
memory/2328-8-0x0000000074ED0000-0x0000000075680000-memory.dmp

Filesize
7.7MB

Download
memory/2328-9-0x0000000005630000-0x0000000005640000-memory.dmp

Filesize
64KB

Download
memory/2328-10-0x0000000006450000-0x0000000006510000-memory.dmp

Filesize
768KB

Download
memory/2328-11-0x0000000008B70000-0x0000000008C0C000-memory.dmp

Filesize
624KB

Download
memory/2328-0-0x0000000074EDE000-0x0000000074EDF000-memory.dmp

Filesize
4KB

Download
memory/2328-1-0x0000000000780000-0x000000000087E000-memory.dmp

Filesize
1016KB

Download
memory/2328-2-0x0000000005670000-0x0000000005C14000-memory.dmp

Filesize
5.6MB

Download
memory/2328-7-0x0000000074EDE000-0x0000000074EDF000-memory.dmp

Filesize
4KB

Download
memory/2328-19-0x0000000074ED0000-0x0000000075680000-memory.dmp

Filesize
7.7MB

Download
memory/2328-4-0x0000000005120000-0x000000000512A000-memory.dmp

Filesize
40KB

Download
memory/2328-3-0x0000000005160000-0x00000000051F2000-memory.dmp

Filesize
584KB

Download
memory/2364-32-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2364-42-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2364-35-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2364-26-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2364-29-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2780-12-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2780-45-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2780-59-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2780-21-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2780-23-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2780-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2780-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2780-16-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2780-17-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2780-18-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2780-15-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2780-13-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2780-44-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2780-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2780-49-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2780-48-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2780-50-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2780-51-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2780-52-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2780-53-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2780-54-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2780-55-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2780-56-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2780-60-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/5088-34-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download