remcos | bd7881bba1d222d41dffeed7e666f6c916886ad5841842064922deef45b67e87

Analysis

max time kernel
299s
max time network
283s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
16-05-2024 12:42

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General

Target

Medisterplses.exe
Size

417KB
MD5

ce9a01b0cb4fefdcf3e515c04eed116a
SHA1

b8ad340b679ba3e82d7ffc638338b9b3a2aea6c9
SHA256

bd7881bba1d222d41dffeed7e666f6c916886ad5841842064922deef45b67e87
SHA512

a31da8278c3fd4661ce4d7a5d971a21a8cb4f5983998bd6aa2a8e51abee6f491edfd97a4ed05dd340539714a28267f1f9cb35910b3ce3f30927ff03451f55f9b
SSDEEP

12288:FdY4AJBniIuil827YSeuie2OeSNu0ldZ4obxZm5g4:Fe4AJBniIVsSeuie7HPZZZ4

Score

10^/10

remcos remotehost collection rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

185.202.173.179:2404

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-IQO6U9
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

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

Processes:

resource	yara_rule
behavioral2/memory/2164-41-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/2164-31-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

Processes:

resource	yara_rule
behavioral2/memory/3960-40-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/3960-30-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/3960-48-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Nirsoft 7 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1432-44-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/2164-41-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/3960-40-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/1432-35-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/2164-31-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/3960-30-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/3960-48-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

Loads dropped DLL 1 IoCs

Processes:

Medisterplses.exe

pid process

1000 Medisterplses.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

pid	process
1000	Medisterplses.exe

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

Processes:

Medisterplses.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-2994005945-4089876968-1367784197-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	Medisterplses.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

Processes:

Medisterplses.exe

pid process

812 Medisterplses.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

Medisterplses.exeMedisterplses.exe

pid process

1000 Medisterplses.exe
812 Medisterplses.exe

pid	process
812	Medisterplses.exe

pid	process
1000	Medisterplses.exe
812	Medisterplses.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

Medisterplses.exeMedisterplses.exe

description	pid	process	target process
PID 1000 set thread context of 812	1000	Medisterplses.exe	Medisterplses.exe
PID 812 set thread context of 3960	812	Medisterplses.exe	Medisterplses.exe
PID 812 set thread context of 2164	812	Medisterplses.exe	Medisterplses.exe
PID 812 set thread context of 1432	812	Medisterplses.exe	Medisterplses.exe

Drops file in Windows directory 1 IoCs

Processes:

Medisterplses.exe

description ioc process

File opened for modification C:\Windows\forsrgelsens.cur Medisterplses.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

Medisterplses.exeMedisterplses.exe

pid process

3960 Medisterplses.exe
3960 Medisterplses.exe
1432 Medisterplses.exe
1432 Medisterplses.exe
3960 Medisterplses.exe
3960 Medisterplses.exe
Suspicious behavior: MapViewOfSection 4 IoCs

Processes:

Medisterplses.exeMedisterplses.exe

pid process

1000 Medisterplses.exe
812 Medisterplses.exe
812 Medisterplses.exe
812 Medisterplses.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Medisterplses.exe

description pid process

Token: SeDebugPrivilege 1432 Medisterplses.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Medisterplses.exe

pid process

812 Medisterplses.exe

description	ioc	process
File opened for modification	C:\Windows\forsrgelsens.cur	Medisterplses.exe

pid	process
3960	Medisterplses.exe
3960	Medisterplses.exe
1432	Medisterplses.exe
1432	Medisterplses.exe
3960	Medisterplses.exe
3960	Medisterplses.exe

pid	process
1000	Medisterplses.exe
812	Medisterplses.exe
812	Medisterplses.exe
812	Medisterplses.exe

description	pid	process
Token: SeDebugPrivilege	1432	Medisterplses.exe

pid	process
812	Medisterplses.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

Medisterplses.exeMedisterplses.exe

description	pid	process	target process
PID 1000 wrote to memory of 812	1000	Medisterplses.exe	Medisterplses.exe
PID 1000 wrote to memory of 812	1000	Medisterplses.exe	Medisterplses.exe
PID 1000 wrote to memory of 812	1000	Medisterplses.exe	Medisterplses.exe
PID 1000 wrote to memory of 812	1000	Medisterplses.exe	Medisterplses.exe
PID 1000 wrote to memory of 812	1000	Medisterplses.exe	Medisterplses.exe
PID 812 wrote to memory of 3960	812	Medisterplses.exe	Medisterplses.exe
PID 812 wrote to memory of 3960	812	Medisterplses.exe	Medisterplses.exe
PID 812 wrote to memory of 3960	812	Medisterplses.exe	Medisterplses.exe
PID 812 wrote to memory of 2164	812	Medisterplses.exe	Medisterplses.exe
PID 812 wrote to memory of 2164	812	Medisterplses.exe	Medisterplses.exe
PID 812 wrote to memory of 2164	812	Medisterplses.exe	Medisterplses.exe
PID 812 wrote to memory of 1432	812	Medisterplses.exe	Medisterplses.exe
PID 812 wrote to memory of 1432	812	Medisterplses.exe	Medisterplses.exe
PID 812 wrote to memory of 1432	812	Medisterplses.exe	Medisterplses.exe

C:\Users\Admin\AppData\Local\Temp\Medisterplses.exe
"C:\Users\Admin\AppData\Local\Temp\Medisterplses.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1000
- C:\Users\Admin\AppData\Local\Temp\Medisterplses.exe
  "C:\Users\Admin\AppData\Local\Temp\Medisterplses.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of SetThreadContext
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:812
- - C:\Users\Admin\AppData\Local\Temp\Medisterplses.exe
    C:\Users\Admin\AppData\Local\Temp\Medisterplses.exe /stext "C:\Users\Admin\AppData\Local\Temp\wndboozjtryenbfigphnoabgaovkdcy"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:3960
- - C:\Users\Admin\AppData\Local\Temp\Medisterplses.exe
    C:\Users\Admin\AppData\Local\Temp\Medisterplses.exe /stext "C:\Users\Admin\AppData\Local\Temp\gpjt"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:2164
- - C:\Users\Admin\AppData\Local\Temp\Medisterplses.exe
    C:\Users\Admin\AppData\Local\Temp\Medisterplses.exe /stext "C:\Users\Admin\AppData\Local\Temp\rjwehzv"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1432

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

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
deb80732093f18ab879e0e8da3e5b9b4

SHA1
b65df834da55030a33c37069c6deb8d31afc50e5

SHA256
f0bc99a80977e444b6c81ebf4dc4da74c47457e29e4e5e8b8498e94455602e63

SHA512
1133cfff3d82b56c0a4d6556439859c22a552d4c0b706e1b0b6c833b54807d25ab177e90ffd95aaf1af824c14489280036d20b0d449a48b39f6dbd1705de2f57

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsd67B5.tmp\System.dll

Filesize
11KB

MD5
75ed96254fbf894e42058062b4b4f0d1

SHA1
996503f1383b49021eb3427bc28d13b5bbd11977

SHA256
a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7

SHA512
58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

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

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
memory/812-83-0x0000000000480000-0x0000000001797000-memory.dmp

Filesize
19.1MB

Download
memory/812-86-0x0000000000480000-0x0000000001797000-memory.dmp

Filesize
19.1MB

Download
memory/812-21-0x00007FFA2C600000-0x00007FFA2C809000-memory.dmp

Filesize
2.0MB

Download
memory/812-23-0x0000000000480000-0x0000000001797000-memory.dmp

Filesize
19.1MB

Download
memory/812-137-0x0000000000480000-0x0000000001797000-memory.dmp

Filesize
19.1MB

Download
memory/812-16-0x00007FFA2C600000-0x00007FFA2C809000-memory.dmp

Filesize
2.0MB

Download
memory/812-122-0x0000000000480000-0x0000000001797000-memory.dmp

Filesize
19.1MB

Download
memory/812-119-0x0000000000480000-0x0000000001797000-memory.dmp

Filesize
19.1MB

Download
memory/812-116-0x0000000000480000-0x0000000001797000-memory.dmp

Filesize
19.1MB

Download
memory/812-58-0x0000000000480000-0x0000000001797000-memory.dmp

Filesize
19.1MB

Download
memory/812-104-0x0000000000480000-0x0000000001797000-memory.dmp

Filesize
19.1MB

Download
memory/812-101-0x0000000000480000-0x0000000001797000-memory.dmp

Filesize
19.1MB

Download
memory/812-98-0x0000000000480000-0x0000000001797000-memory.dmp

Filesize
19.1MB

Download
memory/812-95-0x0000000000480000-0x0000000001797000-memory.dmp

Filesize
19.1MB

Download
memory/812-92-0x0000000000480000-0x0000000001797000-memory.dmp

Filesize
19.1MB

Download
memory/812-89-0x0000000000480000-0x0000000001797000-memory.dmp

Filesize
19.1MB

Download
memory/812-19-0x0000000000480000-0x0000000001797000-memory.dmp

Filesize
19.1MB

Download
memory/812-80-0x0000000000480000-0x0000000001797000-memory.dmp

Filesize
19.1MB

Download
memory/812-77-0x0000000000480000-0x0000000001797000-memory.dmp

Filesize
19.1MB

Download
memory/812-55-0x0000000037180000-0x0000000037199000-memory.dmp

Filesize
100KB

Download
memory/812-54-0x0000000037180000-0x0000000037199000-memory.dmp

Filesize
100KB

Download
memory/812-51-0x0000000037180000-0x0000000037199000-memory.dmp

Filesize
100KB

Download
memory/812-134-0x0000000000480000-0x0000000001797000-memory.dmp

Filesize
19.1MB

Download
memory/812-107-0x0000000000480000-0x0000000001797000-memory.dmp

Filesize
19.1MB

Download
memory/812-65-0x0000000000480000-0x0000000001797000-memory.dmp

Filesize
19.1MB

Download
memory/812-62-0x0000000000480000-0x0000000001797000-memory.dmp

Filesize
19.1MB

Download
memory/812-74-0x0000000000480000-0x0000000001797000-memory.dmp

Filesize
19.1MB

Download
memory/812-60-0x00007FFA2C600000-0x00007FFA2C809000-memory.dmp

Filesize
2.0MB

Download
memory/812-68-0x0000000000480000-0x0000000001797000-memory.dmp

Filesize
19.1MB

Download
memory/812-71-0x0000000000480000-0x0000000001797000-memory.dmp

Filesize
19.1MB

Download
memory/1000-15-0x00007FFA2C600000-0x00007FFA2C809000-memory.dmp

Filesize
2.0MB

Download
memory/1000-14-0x00007FFA2C601000-0x00007FFA2C72A000-memory.dmp

Filesize
1.2MB

Download
memory/1432-34-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1432-35-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1432-32-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1432-44-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2164-41-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2164-29-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2164-31-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2164-26-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2164-43-0x00007FFA2C600000-0x00007FFA2C809000-memory.dmp

Filesize
2.0MB

Download
memory/3960-48-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3960-42-0x00007FFA2C600000-0x00007FFA2C809000-memory.dmp

Filesize
2.0MB

Download
memory/3960-40-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3960-27-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3960-24-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3960-30-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download