remcos | 154cf5e736dcc256fa3d229d1f0dcb4b29ac28081044757c5ae451ddf276c7b0

Analysis

max time kernel
298s
max time network
282s
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, 14:21

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

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
3692	powershell.exe
4028	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-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\International\Geo\Nation	Quotation_pdf.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4336 set thread context of 4196	4336	Quotation_pdf.exe	95

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
3352	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4336	Quotation_pdf.exe
3692	powershell.exe
4028	powershell.exe
4336	Quotation_pdf.exe
3692	powershell.exe
4028	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4336	Quotation_pdf.exe
Token: SeDebugPrivilege	3692	powershell.exe
Token: SeDebugPrivilege	4028	powershell.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 4336 wrote to memory of 3692	4336	Quotation_pdf.exe	89
PID 4336 wrote to memory of 3692	4336	Quotation_pdf.exe	89
PID 4336 wrote to memory of 3692	4336	Quotation_pdf.exe	89
PID 4336 wrote to memory of 4028	4336	Quotation_pdf.exe	91
PID 4336 wrote to memory of 4028	4336	Quotation_pdf.exe	91
PID 4336 wrote to memory of 4028	4336	Quotation_pdf.exe	91
PID 4336 wrote to memory of 3352	4336	Quotation_pdf.exe	93
PID 4336 wrote to memory of 3352	4336	Quotation_pdf.exe	93
PID 4336 wrote to memory of 3352	4336	Quotation_pdf.exe	93
PID 4336 wrote to memory of 4196	4336	Quotation_pdf.exe	95
PID 4336 wrote to memory of 4196	4336	Quotation_pdf.exe	95
PID 4336 wrote to memory of 4196	4336	Quotation_pdf.exe	95
PID 4336 wrote to memory of 4196	4336	Quotation_pdf.exe	95
PID 4336 wrote to memory of 4196	4336	Quotation_pdf.exe	95
PID 4336 wrote to memory of 4196	4336	Quotation_pdf.exe	95
PID 4336 wrote to memory of 4196	4336	Quotation_pdf.exe	95
PID 4336 wrote to memory of 4196	4336	Quotation_pdf.exe	95
PID 4336 wrote to memory of 4196	4336	Quotation_pdf.exe	95
PID 4336 wrote to memory of 4196	4336	Quotation_pdf.exe	95
PID 4336 wrote to memory of 4196	4336	Quotation_pdf.exe	95
PID 4336 wrote to memory of 4196	4336	Quotation_pdf.exe	95

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:4336
- 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:3692
- 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:4028
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\efsOOkOP" /XML "C:\Users\Admin\AppData\Local\Temp\tmpBF97.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:3352
- 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:4196

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

Loading Replay Monitor...

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\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
18KB

MD5
9e359ab4d6b62424ce6b4c38a62cabff

SHA1
42c4174f0f5999b8fda55a2351a73522afda7912

SHA256
9700164d6cbe727fdc8be5ef59e45f48d9e31d091765051b033539cc7449b721

SHA512
fbb4500b035b13abd99f0a23403376f0446a1686242260dc8eb39aa6f732c71d8eb01195b8a3170133b7317829e6420e2263138e9cb06ef2e13da20caa4e3a49

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3jsrrlf3.zy1.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpBF97.tmp

Filesize
1KB

MD5
1cb3c95f9ec5fd989371e1a1b384888e

SHA1
b71bf029e1cde6d849e98eb81ceb81b6e4387643

SHA256
ec7ba767150cb0190257ee91ef0b6c00f3773b20b0e8563683b507061d121492

SHA512
1dbadc02ce670b240badf09689491135abf7ab1f43dfb4d5824737548505b07b989f91635833fa05e48456d420049a63a3f063e51cf258bc38959ca7cbf2f206

Download Submit
memory/3692-65-0x0000000007350000-0x00000000073F3000-memory.dmp

Filesize
652KB

Download
memory/3692-76-0x0000000007CB0000-0x000000000832A000-memory.dmp

Filesize
6.5MB

Download
memory/3692-54-0x000000006FB80000-0x000000006FBCC000-memory.dmp

Filesize
304KB

Download
memory/3692-53-0x0000000007310000-0x0000000007342000-memory.dmp

Filesize
200KB

Download
memory/3692-92-0x00000000749B0000-0x0000000075160000-memory.dmp

Filesize
7.7MB

Download
memory/3692-16-0x00000000749B0000-0x0000000075160000-memory.dmp

Filesize
7.7MB

Download
memory/3692-18-0x00000000749B0000-0x0000000075160000-memory.dmp

Filesize
7.7MB

Download
memory/3692-22-0x0000000005B10000-0x0000000005B76000-memory.dmp

Filesize
408KB

Download
memory/3692-21-0x0000000005410000-0x0000000005476000-memory.dmp

Filesize
408KB

Download
memory/3692-20-0x0000000005370000-0x0000000005392000-memory.dmp

Filesize
136KB

Download
memory/3692-52-0x00000000066F0000-0x000000000673C000-memory.dmp

Filesize
304KB

Download
memory/3692-15-0x0000000002A30000-0x0000000002A66000-memory.dmp

Filesize
216KB

Download
memory/3692-19-0x00000000749B0000-0x0000000075160000-memory.dmp

Filesize
7.7MB

Download
memory/3692-17-0x00000000054E0000-0x0000000005B08000-memory.dmp

Filesize
6.2MB

Download
memory/3692-27-0x0000000005C00000-0x0000000005F54000-memory.dmp

Filesize
3.3MB

Download
memory/3692-64-0x00000000068E0000-0x00000000068FE000-memory.dmp

Filesize
120KB

Download
memory/3692-51-0x0000000006340000-0x000000000635E000-memory.dmp

Filesize
120KB

Download
memory/4028-83-0x0000000007420000-0x0000000007434000-memory.dmp

Filesize
80KB

Download
memory/4028-82-0x0000000007410000-0x000000000741E000-memory.dmp

Filesize
56KB

Download
memory/4028-84-0x0000000007520000-0x000000000753A000-memory.dmp

Filesize
104KB

Download
memory/4028-81-0x00000000073E0000-0x00000000073F1000-memory.dmp

Filesize
68KB

Download
memory/4028-80-0x0000000007460000-0x00000000074F6000-memory.dmp

Filesize
600KB

Download
memory/4028-85-0x0000000007500000-0x0000000007508000-memory.dmp

Filesize
32KB

Download
memory/4028-78-0x0000000007250000-0x000000000725A000-memory.dmp

Filesize
40KB

Download
memory/4028-66-0x000000006FB80000-0x000000006FBCC000-memory.dmp

Filesize
304KB

Download
memory/4028-24-0x00000000749B0000-0x0000000075160000-memory.dmp

Filesize
7.7MB

Download
memory/4028-23-0x00000000749B0000-0x0000000075160000-memory.dmp

Filesize
7.7MB

Download
memory/4028-91-0x00000000749B0000-0x0000000075160000-memory.dmp

Filesize
7.7MB

Download
memory/4028-77-0x00000000071E0000-0x00000000071FA000-memory.dmp

Filesize
104KB

Download
memory/4196-49-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4196-106-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4196-114-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4196-113-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4196-112-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4196-111-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4196-79-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4196-110-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4196-109-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4196-48-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4196-108-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4196-46-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4196-45-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4196-107-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4196-105-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4196-103-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4196-104-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4196-93-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4196-94-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4196-95-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4196-96-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4196-99-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4196-100-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4196-101-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4196-102-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4336-2-0x0000000005FE0000-0x0000000006584000-memory.dmp

Filesize
5.6MB

Download
memory/4336-3-0x0000000005980000-0x0000000005A12000-memory.dmp

Filesize
584KB

Download
memory/4336-4-0x00000000749B0000-0x0000000075160000-memory.dmp

Filesize
7.7MB

Download
memory/4336-50-0x00000000749B0000-0x0000000075160000-memory.dmp

Filesize
7.7MB

Download
memory/4336-5-0x0000000005A60000-0x0000000005A6A000-memory.dmp

Filesize
40KB

Download
memory/4336-0-0x00000000749BE000-0x00000000749BF000-memory.dmp

Filesize
4KB

Download
memory/4336-6-0x0000000005F80000-0x0000000005F92000-memory.dmp

Filesize
72KB

Download
memory/4336-7-0x00000000749BE000-0x00000000749BF000-memory.dmp

Filesize
4KB

Download
memory/4336-8-0x00000000749B0000-0x0000000075160000-memory.dmp

Filesize
7.7MB

Download
memory/4336-9-0x0000000007420000-0x00000000074DE000-memory.dmp

Filesize
760KB

Download
memory/4336-1-0x0000000000EE0000-0x0000000000FC4000-memory.dmp

Filesize
912KB

Download
memory/4336-10-0x0000000009B30000-0x0000000009BCC000-memory.dmp

Filesize
624KB

Download