remcos | 154cf5e736dcc256fa3d229d1f0dcb4b29ac28081044757c5ae451ddf276c7b0

Analysis

max time kernel
147s
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
24-09-2024 21:58

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General

Target

Quotation_pdf.exe
Size

883KB
MD5

571902de75705d1aeaa32be01459dc65
SHA1

4ccf3c9a339146008c1d8466857e13d3c7752a05
SHA256

8f2c4543e4bc9194d1c1a9bc946a75d49162b0eee2715df4ba626980892107b5
SHA512

966381cdeaf8213fefdca876052a59dcda9e2436cfc50b4516eca936ebb9e75b9421058969526fa0b46d06067a43398a51c8e7201fa72d39faa0153c4328a9d7
SSDEEP

24576:kBGzjcJ6NacNEyNOU+6cNuuH2SNcjmYY4Swv:kE86N1l5x8uuWSpYXS2

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
1576	powershell.exe
4696	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-1-5-21-656926755-4116854191-210765258-1000\Control Panel\International\Geo\Nation	Quotation_pdf.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1636 set thread context of 3372	1636	Quotation_pdf.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	Quotation_pdf.exe
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	Quotation_pdf.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
644	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1636	Quotation_pdf.exe
1576	powershell.exe
4696	powershell.exe
1636	Quotation_pdf.exe
1576	powershell.exe
4696	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1636	Quotation_pdf.exe
Token: SeDebugPrivilege	1576	powershell.exe
Token: SeDebugPrivilege	4696	powershell.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1636 wrote to memory of 1576	1636	Quotation_pdf.exe	90
PID 1636 wrote to memory of 1576	1636	Quotation_pdf.exe	90
PID 1636 wrote to memory of 1576	1636	Quotation_pdf.exe	90
PID 1636 wrote to memory of 4696	1636	Quotation_pdf.exe	92
PID 1636 wrote to memory of 4696	1636	Quotation_pdf.exe	92
PID 1636 wrote to memory of 4696	1636	Quotation_pdf.exe	92
PID 1636 wrote to memory of 644	1636	Quotation_pdf.exe	94
PID 1636 wrote to memory of 644	1636	Quotation_pdf.exe	94
PID 1636 wrote to memory of 644	1636	Quotation_pdf.exe	94
PID 1636 wrote to memory of 3372	1636	Quotation_pdf.exe	96
PID 1636 wrote to memory of 3372	1636	Quotation_pdf.exe	96
PID 1636 wrote to memory of 3372	1636	Quotation_pdf.exe	96
PID 1636 wrote to memory of 3372	1636	Quotation_pdf.exe	96
PID 1636 wrote to memory of 3372	1636	Quotation_pdf.exe	96
PID 1636 wrote to memory of 3372	1636	Quotation_pdf.exe	96
PID 1636 wrote to memory of 3372	1636	Quotation_pdf.exe	96
PID 1636 wrote to memory of 3372	1636	Quotation_pdf.exe	96
PID 1636 wrote to memory of 3372	1636	Quotation_pdf.exe	96
PID 1636 wrote to memory of 3372	1636	Quotation_pdf.exe	96
PID 1636 wrote to memory of 3372	1636	Quotation_pdf.exe	96
PID 1636 wrote to memory of 3372	1636	Quotation_pdf.exe	96

C:\Users\Admin\AppData\Local\Temp\Quotation_pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Quotation_pdf.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:1636
- 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\Quotation_pdf.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1576
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\efsOOkOP.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4696
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\efsOOkOP" /XML "C:\Users\Admin\AppData\Local\Temp\tmp5E7.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:644
- C:\Users\Admin\AppData\Local\Temp\Quotation_pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Quotation_pdf.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3372

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

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
18KB

MD5
3a61c2c22b2da69fc9fe6c1f79542bf1

SHA1
226700bb464c0e19dea6c49710bd4c8b703cb2ec

SHA256
a66a490e9b0a69c7b842012ec8be7c9ef1964dd9b16b1716f69814c7ec8b76c8

SHA512
e4e72be74dddf9fb4b62ba5ec60eeb37ef8e16668380dceea5e010a2dd2ab570647c246d5fc24eb810bf7256b4a09ce7b817068918b17529ae4003f236c874b5

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_44rvukf3.2tr.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp5E7.tmp

Filesize
1KB

MD5
85d873780b874daaf8ee5f3e24156b53

SHA1
6c635bec664887493c6fc9b9a643fe3fa10f544d

SHA256
b56a08fcdc267f6aaa1cf5768c0a190666e4b57f27278e6bdadad42590b3e500

SHA512
ac84d393f9a0bb3f3ae468d25ee32e2b2a427b251fed8ed6dd63f5e5a03a46cfd6679a0c20839189ef7d23a9a34c3377c869d4b9c52dafbce23ff7d49057a1de

Download Submit
memory/1576-52-0x0000000005FC0000-0x000000000600C000-memory.dmp

Filesize
304KB

Download
memory/1576-24-0x0000000005120000-0x0000000005186000-memory.dmp

Filesize
408KB

Download
memory/1576-91-0x0000000074760000-0x0000000074F10000-memory.dmp

Filesize
7.7MB

Download
memory/1576-86-0x0000000007590000-0x0000000007598000-memory.dmp

Filesize
32KB

Download
memory/1576-64-0x0000000075010000-0x000000007505C000-memory.dmp

Filesize
304KB

Download
memory/1576-78-0x00000000072E0000-0x00000000072EA000-memory.dmp

Filesize
40KB

Download
memory/1576-77-0x0000000007270000-0x000000000728A000-memory.dmp

Filesize
104KB

Download
memory/1576-76-0x00000000078B0000-0x0000000007F2A000-memory.dmp

Filesize
6.5MB

Download
memory/1576-15-0x0000000002660000-0x0000000002696000-memory.dmp

Filesize
216KB

Download
memory/1576-16-0x0000000074760000-0x0000000074F10000-memory.dmp

Filesize
7.7MB

Download
memory/1576-18-0x0000000074760000-0x0000000074F10000-memory.dmp

Filesize
7.7MB

Download
memory/1576-19-0x0000000074760000-0x0000000074F10000-memory.dmp

Filesize
7.7MB

Download
memory/1576-17-0x0000000005240000-0x0000000005868000-memory.dmp

Filesize
6.2MB

Download
memory/1576-75-0x0000000006F40000-0x0000000006FE3000-memory.dmp

Filesize
652KB

Download
memory/1576-74-0x0000000006F20000-0x0000000006F3E000-memory.dmp

Filesize
120KB

Download
memory/1576-51-0x0000000005F30000-0x0000000005F4E000-memory.dmp

Filesize
120KB

Download
memory/1576-22-0x0000000005080000-0x00000000050A2000-memory.dmp

Filesize
136KB

Download
memory/1576-25-0x0000000005920000-0x0000000005986000-memory.dmp

Filesize
408KB

Download
memory/1576-44-0x0000000005990000-0x0000000005CE4000-memory.dmp

Filesize
3.3MB

Download
memory/1636-7-0x000000007476E000-0x000000007476F000-memory.dmp

Filesize
4KB

Download
memory/1636-10-0x0000000009B40000-0x0000000009BDC000-memory.dmp

Filesize
624KB

Download
memory/1636-1-0x0000000000E90000-0x0000000000F74000-memory.dmp

Filesize
912KB

Download
memory/1636-6-0x0000000005F40000-0x0000000005F52000-memory.dmp

Filesize
72KB

Download
memory/1636-2-0x0000000005F70000-0x0000000006514000-memory.dmp

Filesize
5.6MB

Download
memory/1636-8-0x0000000074760000-0x0000000074F10000-memory.dmp

Filesize
7.7MB

Download
memory/1636-50-0x0000000074760000-0x0000000074F10000-memory.dmp

Filesize
7.7MB

Download
memory/1636-3-0x00000000059C0000-0x0000000005A52000-memory.dmp

Filesize
584KB

Download
memory/1636-0-0x000000007476E000-0x000000007476F000-memory.dmp

Filesize
4KB

Download
memory/1636-5-0x0000000005970000-0x000000000597A000-memory.dmp

Filesize
40KB

Download
memory/1636-4-0x0000000074760000-0x0000000074F10000-memory.dmp

Filesize
7.7MB

Download
memory/1636-9-0x0000000007470000-0x000000000752E000-memory.dmp

Filesize
760KB

Download
memory/3372-81-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3372-45-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3372-104-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3372-47-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3372-105-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3372-103-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3372-102-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3372-49-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3372-82-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3372-101-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3372-100-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3372-99-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3372-46-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3372-98-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3372-95-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3372-94-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3372-93-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4696-92-0x0000000074760000-0x0000000074F10000-memory.dmp

Filesize
7.7MB

Download
memory/4696-54-0x0000000075010000-0x000000007505C000-memory.dmp

Filesize
304KB

Download
memory/4696-21-0x0000000074760000-0x0000000074F10000-memory.dmp

Filesize
7.7MB

Download
memory/4696-85-0x0000000007820000-0x000000000783A000-memory.dmp

Filesize
104KB

Download
memory/4696-84-0x0000000007720000-0x0000000007734000-memory.dmp

Filesize
80KB

Download
memory/4696-83-0x0000000007710000-0x000000000771E000-memory.dmp

Filesize
56KB

Download
memory/4696-80-0x00000000076E0000-0x00000000076F1000-memory.dmp

Filesize
68KB

Download
memory/4696-79-0x0000000007760000-0x00000000077F6000-memory.dmp

Filesize
600KB

Download
memory/4696-53-0x0000000007350000-0x0000000007382000-memory.dmp

Filesize
200KB

Download
memory/4696-20-0x0000000074760000-0x0000000074F10000-memory.dmp

Filesize
7.7MB

Download