remcos | c99b050645ebbc138018a9dcb4c3029bc1a9aa9376e7541c1011e815942948e1

Resubmissions

01-02-2023 17:02

230201-vj6p3aah39 10

01-02-2023 17:00

230201-vjf5eacg4s 10

01-02-2023 16:57

230201-vgbrxacg2y 10

Analysis

max time kernel
602s
max time network
573s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
01-02-2023 17:02

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General

Target

ORDER INQUIRY 20230201.exe
Size

1.1MB
MD5

4bc918bf6311c5b753c353efd306547e
SHA1

9b7301fc448a6d9564e6b984363190ffa88ab891
SHA256

89f4203e055ad6d3b40b74d683ed1ca0436ad4df41c3456f23134c4a15eb6c13
SHA512

0d9b575c93cb73de5cfc175335f72cefb8b9d3f5d5e90ab1353b0362fbde0bbcfc288fa5039759fb92ad0154e836c3cefb9636e7a108d5706023611e1ac93cfe
SSDEEP

24576:peOaJr8zw6RgDlCwwWbYqhseWy97+3A3Me83RAiTH/qc4N34:pAJr8zgDlCww6YqhsOY3OKhAiT

Score

10^/10

remcos new rem stub collection rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

NEW REM STUB

onyem.duckdns.org:5050

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-HFP2Q6
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Remcos
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

Processes:

resource	yara_rule
behavioral18/memory/3556-153-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

Processes:

resource	yara_rule
behavioral18/memory/1072-156-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Nirsoft 3 IoCs

Processes:

resource	yara_rule
behavioral18/memory/3556-153-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft
behavioral18/memory/4896-154-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral18/memory/1072-156-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

ORDER INQUIRY 20230201.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\Control Panel\International\Geo\Nation	ORDER INQUIRY 20230201.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
T1081

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

Processes:

ORDER INQUIRY 20230201.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	ORDER INQUIRY 20230201.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

ORDER INQUIRY 20230201.exeORDER INQUIRY 20230201.exe

description	pid	process	target process
PID 4084 set thread context of 1852	4084	ORDER INQUIRY 20230201.exe	ORDER INQUIRY 20230201.exe
PID 1852 set thread context of 1072	1852	ORDER INQUIRY 20230201.exe	ORDER INQUIRY 20230201.exe
PID 1852 set thread context of 3556	1852	ORDER INQUIRY 20230201.exe	ORDER INQUIRY 20230201.exe
PID 1852 set thread context of 4896	1852	ORDER INQUIRY 20230201.exe	ORDER INQUIRY 20230201.exe

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

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

3008 schtasks.exe

pid	process
3008	schtasks.exe

Suspicious behavior: EnumeratesProcesses 15 IoCs

Processes:

ORDER INQUIRY 20230201.exepowershell.exeORDER INQUIRY 20230201.exeORDER INQUIRY 20230201.exe

pid	process
4084	ORDER INQUIRY 20230201.exe
4084	ORDER INQUIRY 20230201.exe
4084	ORDER INQUIRY 20230201.exe
4084	ORDER INQUIRY 20230201.exe
4084	ORDER INQUIRY 20230201.exe
4084	ORDER INQUIRY 20230201.exe
4084	ORDER INQUIRY 20230201.exe
2724	powershell.exe
2724	powershell.exe
1072	ORDER INQUIRY 20230201.exe
1072	ORDER INQUIRY 20230201.exe
4896	ORDER INQUIRY 20230201.exe
4896	ORDER INQUIRY 20230201.exe
1072	ORDER INQUIRY 20230201.exe
1072	ORDER INQUIRY 20230201.exe

Suspicious behavior: MapViewOfSection 3 IoCs

Processes:

ORDER INQUIRY 20230201.exe

pid process

1852 ORDER INQUIRY 20230201.exe
1852 ORDER INQUIRY 20230201.exe
1852 ORDER INQUIRY 20230201.exe

pid	process
1852	ORDER INQUIRY 20230201.exe
1852	ORDER INQUIRY 20230201.exe
1852	ORDER INQUIRY 20230201.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

ORDER INQUIRY 20230201.exepowershell.exeORDER INQUIRY 20230201.exe

description	pid	process
Token: SeDebugPrivilege	4084	ORDER INQUIRY 20230201.exe
Token: SeDebugPrivilege	2724	powershell.exe
Token: SeDebugPrivilege	4896	ORDER INQUIRY 20230201.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

ORDER INQUIRY 20230201.exe

pid process

1852 ORDER INQUIRY 20230201.exe

pid	process
1852	ORDER INQUIRY 20230201.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

ORDER INQUIRY 20230201.exeORDER INQUIRY 20230201.exe

description	pid	process	target process
PID 4084 wrote to memory of 2724	4084	ORDER INQUIRY 20230201.exe	powershell.exe
PID 4084 wrote to memory of 2724	4084	ORDER INQUIRY 20230201.exe	powershell.exe
PID 4084 wrote to memory of 2724	4084	ORDER INQUIRY 20230201.exe	powershell.exe
PID 4084 wrote to memory of 3008	4084	ORDER INQUIRY 20230201.exe	schtasks.exe
PID 4084 wrote to memory of 3008	4084	ORDER INQUIRY 20230201.exe	schtasks.exe
PID 4084 wrote to memory of 3008	4084	ORDER INQUIRY 20230201.exe	schtasks.exe
PID 4084 wrote to memory of 1852	4084	ORDER INQUIRY 20230201.exe	ORDER INQUIRY 20230201.exe
PID 4084 wrote to memory of 1852	4084	ORDER INQUIRY 20230201.exe	ORDER INQUIRY 20230201.exe
PID 4084 wrote to memory of 1852	4084	ORDER INQUIRY 20230201.exe	ORDER INQUIRY 20230201.exe
PID 4084 wrote to memory of 1852	4084	ORDER INQUIRY 20230201.exe	ORDER INQUIRY 20230201.exe
PID 4084 wrote to memory of 1852	4084	ORDER INQUIRY 20230201.exe	ORDER INQUIRY 20230201.exe
PID 4084 wrote to memory of 1852	4084	ORDER INQUIRY 20230201.exe	ORDER INQUIRY 20230201.exe
PID 4084 wrote to memory of 1852	4084	ORDER INQUIRY 20230201.exe	ORDER INQUIRY 20230201.exe
PID 4084 wrote to memory of 1852	4084	ORDER INQUIRY 20230201.exe	ORDER INQUIRY 20230201.exe
PID 4084 wrote to memory of 1852	4084	ORDER INQUIRY 20230201.exe	ORDER INQUIRY 20230201.exe
PID 4084 wrote to memory of 1852	4084	ORDER INQUIRY 20230201.exe	ORDER INQUIRY 20230201.exe
PID 4084 wrote to memory of 1852	4084	ORDER INQUIRY 20230201.exe	ORDER INQUIRY 20230201.exe
PID 4084 wrote to memory of 1852	4084	ORDER INQUIRY 20230201.exe	ORDER INQUIRY 20230201.exe
PID 1852 wrote to memory of 1072	1852	ORDER INQUIRY 20230201.exe	ORDER INQUIRY 20230201.exe
PID 1852 wrote to memory of 1072	1852	ORDER INQUIRY 20230201.exe	ORDER INQUIRY 20230201.exe
PID 1852 wrote to memory of 1072	1852	ORDER INQUIRY 20230201.exe	ORDER INQUIRY 20230201.exe
PID 1852 wrote to memory of 1072	1852	ORDER INQUIRY 20230201.exe	ORDER INQUIRY 20230201.exe
PID 1852 wrote to memory of 3556	1852	ORDER INQUIRY 20230201.exe	ORDER INQUIRY 20230201.exe
PID 1852 wrote to memory of 3556	1852	ORDER INQUIRY 20230201.exe	ORDER INQUIRY 20230201.exe
PID 1852 wrote to memory of 3556	1852	ORDER INQUIRY 20230201.exe	ORDER INQUIRY 20230201.exe
PID 1852 wrote to memory of 3556	1852	ORDER INQUIRY 20230201.exe	ORDER INQUIRY 20230201.exe
PID 1852 wrote to memory of 4896	1852	ORDER INQUIRY 20230201.exe	ORDER INQUIRY 20230201.exe
PID 1852 wrote to memory of 4896	1852	ORDER INQUIRY 20230201.exe	ORDER INQUIRY 20230201.exe
PID 1852 wrote to memory of 4896	1852	ORDER INQUIRY 20230201.exe	ORDER INQUIRY 20230201.exe
PID 1852 wrote to memory of 4896	1852	ORDER INQUIRY 20230201.exe	ORDER INQUIRY 20230201.exe

C:\Users\Admin\AppData\Local\Temp\ORDER INQUIRY 20230201.exe
"C:\Users\Admin\AppData\Local\Temp\ORDER INQUIRY 20230201.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4084

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\VlANzLOhprFUhQ.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2724

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\VlANzLOhprFUhQ" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2C7E.tmp"
2⤵
- Creates scheduled task(s)
PID:3008

C:\Users\Admin\AppData\Local\Temp\ORDER INQUIRY 20230201.exe
"C:\Users\Admin\AppData\Local\Temp\ORDER INQUIRY 20230201.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1852

C:\Users\Admin\AppData\Local\Temp\ORDER INQUIRY 20230201.exe
"C:\Users\Admin\AppData\Local\Temp\ORDER INQUIRY 20230201.exe" /stext "C:\Users\Admin\AppData\Local\Temp\nafelfgovesq"
3⤵
- Suspicious behavior: EnumeratesProcesses
PID:1072

C:\Users\Admin\AppData\Local\Temp\ORDER INQUIRY 20230201.exe
"C:\Users\Admin\AppData\Local\Temp\ORDER INQUIRY 20230201.exe" /stext "C:\Users\Admin\AppData\Local\Temp\xctolyyqjmkvvpte"
3⤵
- Accesses Microsoft Outlook accounts
PID:3556

C:\Users\Admin\AppData\Local\Temp\ORDER INQUIRY 20230201.exe
"C:\Users\Admin\AppData\Local\Temp\ORDER INQUIRY 20230201.exe" /stext "C:\Users\Admin\AppData\Local\Temp\awyhmqjjxucaxvpijcu"
3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4896

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nafelfgovesq
Filesize
4KB

MD5
8937ec50df53642622ba77b9b2dfe88f

SHA1
76e19a0efe5cf6eac0a3bbb81f4a3f12d46d095d

SHA256
e35d3c41759c879026d522ee9c6d5e8afb7ec045856d456d50170306c321f363

SHA512
6aedc7c3c8b5b883f0f944fc8da54d4c0ae85afc8278765c229f4efa28776cba4b37c80bfa7035f358a251c5ef816c0bde805ce70e18052ee291f5d27e07153c

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp2C7E.tmp
Filesize
1KB

MD5
67bdbd43d9da15ba99239f9d4410a5e3

SHA1
87139055e66d1d65930bd93d53896f315a640411

SHA256
28bd924393570474c8a2d2773b5e52e5c7fc1a5faff41ac9680bec19a4cebae5

SHA512
8d426e4d45e533637e45acc8ef36d32d0dcc28eb126955e7b81b2b5a0fe06cc0cec0673315758d717ea4ab4ab043a4ad352323d6a66213b1f532dac83026d638

Download Submit
memory/1072-156-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1072-150-0x0000000000000000-mapping.dmp

Download
memory/1852-143-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1852-141-0x0000000000000000-mapping.dmp

Download
memory/1852-168-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1852-149-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1852-145-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1852-144-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2724-161-0x00000000074D0000-0x0000000007B4A000-memory.dmp

Filesize
6.5MB

Download
memory/2724-155-0x0000000005B00000-0x0000000005B1E000-memory.dmp

Filesize
120KB

Download
memory/2724-167-0x00000000071A0000-0x00000000071A8000-memory.dmp

Filesize
32KB

Download
memory/2724-166-0x00000000071C0000-0x00000000071DA000-memory.dmp

Filesize
104KB

Download
memory/2724-146-0x0000000004B20000-0x0000000004B42000-memory.dmp

Filesize
136KB

Download
memory/2724-147-0x0000000004DC0000-0x0000000004E26000-memory.dmp

Filesize
408KB

Download
memory/2724-148-0x0000000005510000-0x0000000005576000-memory.dmp

Filesize
408KB

Download
memory/2724-139-0x00000000021B0000-0x00000000021E6000-memory.dmp

Filesize
216KB

Download
memory/2724-165-0x00000000070B0000-0x00000000070BE000-memory.dmp

Filesize
56KB

Download
memory/2724-164-0x0000000007100000-0x0000000007196000-memory.dmp

Filesize
600KB

Download
memory/2724-163-0x0000000006EF0000-0x0000000006EFA000-memory.dmp

Filesize
40KB

Download
memory/2724-162-0x0000000006E80000-0x0000000006E9A000-memory.dmp

Filesize
104KB

Download
memory/2724-137-0x0000000000000000-mapping.dmp

Download
memory/2724-142-0x0000000004E70000-0x0000000005498000-memory.dmp

Filesize
6.2MB

Download
memory/2724-160-0x00000000060B0000-0x00000000060CE000-memory.dmp

Filesize
120KB

Download
memory/2724-159-0x0000000070B60000-0x0000000070BAC000-memory.dmp

Filesize
304KB

Download
memory/2724-158-0x00000000060D0000-0x0000000006102000-memory.dmp

Filesize
200KB

Download
memory/3008-138-0x0000000000000000-mapping.dmp

Download
memory/3556-153-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/3556-151-0x0000000000000000-mapping.dmp

Download
memory/4084-133-0x0000000005170000-0x0000000005714000-memory.dmp

Filesize
5.6MB

Download
memory/4084-134-0x0000000004BC0000-0x0000000004C52000-memory.dmp

Filesize
584KB

Download
memory/4084-135-0x0000000004AC0000-0x0000000004ACA000-memory.dmp

Filesize
40KB

Download
memory/4084-136-0x0000000006BC0000-0x0000000006C5C000-memory.dmp

Filesize
624KB

Download
memory/4084-132-0x0000000000010000-0x0000000000126000-memory.dmp

Filesize
1.1MB

Download
memory/4896-154-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4896-152-0x0000000000000000-mapping.dmp

Download