remcos | 49e7ee12a475105efab2e363450b2e5582fc05d114967fe57a3d80d22a2fea81

Resubmissions

21-09-2024 23:17

240921-292mcszcnl 10

21-09-2024 23:07

240921-23yxwsyhqp 10

Analysis

max time kernel
150s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
21-09-2024 23:07

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General

Target

Quotationpdf.exe
Size

869KB
MD5

27934061e8cbcfcf5e5b8937a662c26f
SHA1

a508513b842e11c7c277af67e4bc51466d0637b8
SHA256

49e7ee12a475105efab2e363450b2e5582fc05d114967fe57a3d80d22a2fea81
SHA512

c79374546867ae8197d6fdbec40150b7124e272151e73c2a7361dd96a04b3a5f710d42f82b0d77349a07ae667aee066b11c949782eb2f2329e3711752e2c95d2
SSDEEP

24576:q0jXiRZoEJGywbvjCe9WRSKObmSej7vydBs:MDIvjCe4ebmSejzf

Score

10^/10

remcos remotehost discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

127.0.0.1:59321

nnamoo.duckdns.org:59321

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-41EVS0
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

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
3396	powershell.exe
3652	powershell.exe

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-523280732-2327480845-3730041215-1000\Control Panel\International\Geo\Nation	Quotationpdf.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3620 set thread context of 4004	3620	Quotationpdf.exe	96

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 5 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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Quotationpdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Quotationpdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.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
1404	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3620	Quotationpdf.exe
3652	powershell.exe
3396	powershell.exe
3620	Quotationpdf.exe
3652	powershell.exe
3396	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3620	Quotationpdf.exe
Token: SeDebugPrivilege	3396	powershell.exe
Token: SeDebugPrivilege	3652	powershell.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 3620 wrote to memory of 3396	3620	Quotationpdf.exe	90
PID 3620 wrote to memory of 3396	3620	Quotationpdf.exe	90
PID 3620 wrote to memory of 3396	3620	Quotationpdf.exe	90
PID 3620 wrote to memory of 3652	3620	Quotationpdf.exe	92
PID 3620 wrote to memory of 3652	3620	Quotationpdf.exe	92
PID 3620 wrote to memory of 3652	3620	Quotationpdf.exe	92
PID 3620 wrote to memory of 1404	3620	Quotationpdf.exe	94
PID 3620 wrote to memory of 1404	3620	Quotationpdf.exe	94
PID 3620 wrote to memory of 1404	3620	Quotationpdf.exe	94
PID 3620 wrote to memory of 4004	3620	Quotationpdf.exe	96
PID 3620 wrote to memory of 4004	3620	Quotationpdf.exe	96
PID 3620 wrote to memory of 4004	3620	Quotationpdf.exe	96
PID 3620 wrote to memory of 4004	3620	Quotationpdf.exe	96
PID 3620 wrote to memory of 4004	3620	Quotationpdf.exe	96
PID 3620 wrote to memory of 4004	3620	Quotationpdf.exe	96
PID 3620 wrote to memory of 4004	3620	Quotationpdf.exe	96
PID 3620 wrote to memory of 4004	3620	Quotationpdf.exe	96
PID 3620 wrote to memory of 4004	3620	Quotationpdf.exe	96
PID 3620 wrote to memory of 4004	3620	Quotationpdf.exe	96
PID 3620 wrote to memory of 4004	3620	Quotationpdf.exe	96
PID 3620 wrote to memory of 4004	3620	Quotationpdf.exe	96

C:\Users\Admin\AppData\Local\Temp\Quotationpdf.exe
"C:\Users\Admin\AppData\Local\Temp\Quotationpdf.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3620
- 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\Quotationpdf.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3396
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\BptXqGmS.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3652
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\BptXqGmS" /XML "C:\Users\Admin\AppData\Local\Temp\tmpEE96.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:1404
- C:\Users\Admin\AppData\Local\Temp\Quotationpdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Quotationpdf.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4004

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

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
968cb9309758126772781b83adb8a28f

SHA1
8da30e71accf186b2ba11da1797cf67f8f78b47c

SHA256
92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

SHA512
4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_yzoauxy4.fjl.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpEE96.tmp

Filesize
1KB

MD5
a706195424b8e8d80f40a91d3446a826

SHA1
9ecc593c81981baabf9d35850bbca110d9fc9b69

SHA256
52775cf765013e3993c8957283512d7fae43320bf241e70735a5f99dc3cd8a9f

SHA512
e1e7de124a666fea4f8bce4ba58fedcd658d1a9a6e4804b5bdd992341d695c06027dd9056497d917085c5f83dd9e3e22d582c0c5af596cc0dc6d097d581aa19b

Download Submit
memory/3396-18-0x0000000074ED0000-0x0000000075680000-memory.dmp

Filesize
7.7MB

Download
memory/3396-25-0x0000000005630000-0x0000000005984000-memory.dmp

Filesize
3.3MB

Download
memory/3396-54-0x0000000006D90000-0x0000000006DC2000-memory.dmp

Filesize
200KB

Download
memory/3396-75-0x0000000006D70000-0x0000000006D8E000-memory.dmp

Filesize
120KB

Download
memory/3396-76-0x0000000006DD0000-0x0000000006E73000-memory.dmp

Filesize
652KB

Download
memory/3396-55-0x000000006F9E0000-0x000000006FA2C000-memory.dmp

Filesize
304KB

Download
memory/3396-77-0x0000000007570000-0x0000000007BEA000-memory.dmp

Filesize
6.5MB

Download
memory/3396-20-0x0000000004C60000-0x0000000004C82000-memory.dmp

Filesize
136KB

Download
memory/3396-15-0x0000000000A60000-0x0000000000A96000-memory.dmp

Filesize
216KB

Download
memory/3396-17-0x0000000004EA0000-0x00000000054C8000-memory.dmp

Filesize
6.2MB

Download
memory/3396-16-0x0000000074ED0000-0x0000000075680000-memory.dmp

Filesize
7.7MB

Download
memory/3396-23-0x00000000055C0000-0x0000000005626000-memory.dmp

Filesize
408KB

Download
memory/3396-19-0x0000000074ED0000-0x0000000075680000-memory.dmp

Filesize
7.7MB

Download
memory/3396-22-0x0000000004E00000-0x0000000004E66000-memory.dmp

Filesize
408KB

Download
memory/3396-92-0x0000000074ED0000-0x0000000075680000-memory.dmp

Filesize
7.7MB

Download
memory/3620-0-0x0000000074EDE000-0x0000000074EDF000-memory.dmp

Filesize
4KB

Download
memory/3620-3-0x0000000004C40000-0x0000000004CD2000-memory.dmp

Filesize
584KB

Download
memory/3620-10-0x0000000008E60000-0x0000000008EFC000-memory.dmp

Filesize
624KB

Download
memory/3620-2-0x0000000005100000-0x00000000056A4000-memory.dmp

Filesize
5.6MB

Download
memory/3620-5-0x0000000074ED0000-0x0000000075680000-memory.dmp

Filesize
7.7MB

Download
memory/3620-1-0x00000000001A0000-0x0000000000280000-memory.dmp

Filesize
896KB

Download
memory/3620-9-0x00000000067F0000-0x00000000068AE000-memory.dmp

Filesize
760KB

Download
memory/3620-8-0x0000000074ED0000-0x0000000075680000-memory.dmp

Filesize
7.7MB

Download
memory/3620-7-0x0000000074EDE000-0x0000000074EDF000-memory.dmp

Filesize
4KB

Download
memory/3620-6-0x0000000005070000-0x0000000005080000-memory.dmp

Filesize
64KB

Download
memory/3620-4-0x0000000004D00000-0x0000000004D0A000-memory.dmp

Filesize
40KB

Download
memory/3620-51-0x0000000074ED0000-0x0000000075680000-memory.dmp

Filesize
7.7MB

Download
memory/3652-52-0x00000000062B0000-0x00000000062CE000-memory.dmp

Filesize
120KB

Download
memory/3652-82-0x0000000007820000-0x000000000782E000-memory.dmp

Filesize
56KB

Download
memory/3652-21-0x0000000074ED0000-0x0000000075680000-memory.dmp

Filesize
7.7MB

Download
memory/3652-93-0x0000000074ED0000-0x0000000075680000-memory.dmp

Filesize
7.7MB

Download
memory/3652-26-0x0000000074ED0000-0x0000000075680000-memory.dmp

Filesize
7.7MB

Download
memory/3652-61-0x000000006F9E0000-0x000000006FA2C000-memory.dmp

Filesize
304KB

Download
memory/3652-48-0x0000000074ED0000-0x0000000075680000-memory.dmp

Filesize
7.7MB

Download
memory/3652-53-0x00000000066E0000-0x000000000672C000-memory.dmp

Filesize
304KB

Download
memory/3652-78-0x00000000073E0000-0x00000000073FA000-memory.dmp

Filesize
104KB

Download
memory/3652-79-0x0000000007670000-0x000000000767A000-memory.dmp

Filesize
40KB

Download
memory/3652-80-0x0000000007870000-0x0000000007906000-memory.dmp

Filesize
600KB

Download
memory/3652-81-0x00000000077F0000-0x0000000007801000-memory.dmp

Filesize
68KB

Download
memory/3652-84-0x0000000007830000-0x0000000007844000-memory.dmp

Filesize
80KB

Download
memory/3652-85-0x0000000007930000-0x000000000794A000-memory.dmp

Filesize
104KB

Download
memory/3652-86-0x0000000007910000-0x0000000007918000-memory.dmp

Filesize
32KB

Download
memory/4004-87-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4004-98-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4004-49-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4004-47-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4004-46-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4004-45-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4004-94-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4004-95-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4004-96-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4004-83-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4004-100-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4004-99-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4004-101-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4004-102-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4004-104-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4004-103-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4004-105-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4004-106-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download