remcos | 8f2c4543e4bc9194d1c1a9bc946a75d49162b0eee2715df4ba626980892107b5

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
23-09-2024 14:19

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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
3568	powershell.exe
3412	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-1-5-21-945322488-2060912225-3527527000-1000\Control Panel\International\Geo\Nation	Quotation_pdf.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2388 set thread context of 4488	2388	Quotation_pdf.exe	97

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	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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Quotation_pdf.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
2644	schtasks.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
2388	Quotation_pdf.exe
3568	powershell.exe
3412	powershell.exe
2388	Quotation_pdf.exe
2388	Quotation_pdf.exe
2388	Quotation_pdf.exe
2388	Quotation_pdf.exe
2388	Quotation_pdf.exe
3568	powershell.exe
3412	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2388	Quotation_pdf.exe
Token: SeDebugPrivilege	3568	powershell.exe
Token: SeDebugPrivilege	3412	powershell.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 2388 wrote to memory of 3568	2388	Quotation_pdf.exe	89
PID 2388 wrote to memory of 3568	2388	Quotation_pdf.exe	89
PID 2388 wrote to memory of 3568	2388	Quotation_pdf.exe	89
PID 2388 wrote to memory of 3412	2388	Quotation_pdf.exe	91
PID 2388 wrote to memory of 3412	2388	Quotation_pdf.exe	91
PID 2388 wrote to memory of 3412	2388	Quotation_pdf.exe	91
PID 2388 wrote to memory of 2644	2388	Quotation_pdf.exe	93
PID 2388 wrote to memory of 2644	2388	Quotation_pdf.exe	93
PID 2388 wrote to memory of 2644	2388	Quotation_pdf.exe	93
PID 2388 wrote to memory of 2384	2388	Quotation_pdf.exe	95
PID 2388 wrote to memory of 2384	2388	Quotation_pdf.exe	95
PID 2388 wrote to memory of 2384	2388	Quotation_pdf.exe	95
PID 2388 wrote to memory of 1548	2388	Quotation_pdf.exe	96
PID 2388 wrote to memory of 1548	2388	Quotation_pdf.exe	96
PID 2388 wrote to memory of 1548	2388	Quotation_pdf.exe	96
PID 2388 wrote to memory of 4488	2388	Quotation_pdf.exe	97
PID 2388 wrote to memory of 4488	2388	Quotation_pdf.exe	97
PID 2388 wrote to memory of 4488	2388	Quotation_pdf.exe	97
PID 2388 wrote to memory of 4488	2388	Quotation_pdf.exe	97
PID 2388 wrote to memory of 4488	2388	Quotation_pdf.exe	97
PID 2388 wrote to memory of 4488	2388	Quotation_pdf.exe	97
PID 2388 wrote to memory of 4488	2388	Quotation_pdf.exe	97
PID 2388 wrote to memory of 4488	2388	Quotation_pdf.exe	97
PID 2388 wrote to memory of 4488	2388	Quotation_pdf.exe	97
PID 2388 wrote to memory of 4488	2388	Quotation_pdf.exe	97
PID 2388 wrote to memory of 4488	2388	Quotation_pdf.exe	97
PID 2388 wrote to memory of 4488	2388	Quotation_pdf.exe	97

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:2388
- 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:3568
- 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:3412
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\efsOOkOP" /XML "C:\Users\Admin\AppData\Local\Temp\tmpE2FD.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2644
- C:\Users\Admin\AppData\Local\Temp\Quotation_pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Quotation_pdf.exe"
  2⤵
  PID:2384
- C:\Users\Admin\AppData\Local\Temp\Quotation_pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Quotation_pdf.exe"
  2⤵
  PID:1548
- 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:4488

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\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
18KB

MD5
dd227dca310a2f4f7f97d145b1c980a5

SHA1
07641718ad8ce4da78c3df900e5c30e9f8cbaaa2

SHA256
a0af5b628325a84df500603ff92dc86c14751f8327ff8397ffdc0012cede100d

SHA512
598f656b7e9ef7c3f0dce34f382aec27e73ee0df4a60ddb87e151e767c11a8a6a7a53cf7b2b0d42034ce9092fad51b14fbcebae0520d54da12d84b0ca0cee49a

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_kckqbtgj.iwr.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpE2FD.tmp

Filesize
1KB

MD5
4d3f983d4839acf288d20431151fb427

SHA1
55d32151a1efeb6e2fd91cab393619602dc8a90d

SHA256
5d663d6f7563bc9d78e02d45b95839da7debf56d884f22febe069f71c2fa3d60

SHA512
ed62d4096b6155c972585b48e5f6487a8286ea7ce0454480ac8e06f7002a8bc96599397da4491e23820e2f43fd3eabab6550b7ca3669e2b39ce23cdd568e2acf

Download Submit
memory/2388-4-0x0000000074D60000-0x0000000075510000-memory.dmp

Filesize
7.7MB

Download
memory/2388-5-0x0000000005AE0000-0x0000000005AEA000-memory.dmp

Filesize
40KB

Download
memory/2388-6-0x0000000006FA0000-0x0000000006FB2000-memory.dmp

Filesize
72KB

Download
memory/2388-7-0x0000000074D6E000-0x0000000074D6F000-memory.dmp

Filesize
4KB

Download
memory/2388-8-0x0000000074D60000-0x0000000075510000-memory.dmp

Filesize
7.7MB

Download
memory/2388-9-0x0000000007420000-0x00000000074DE000-memory.dmp

Filesize
760KB

Download
memory/2388-10-0x0000000009AF0000-0x0000000009B8C000-memory.dmp

Filesize
624KB

Download
memory/2388-3-0x0000000005950000-0x00000000059E2000-memory.dmp

Filesize
584KB

Download
memory/2388-2-0x0000000005F00000-0x00000000064A4000-memory.dmp

Filesize
5.6MB

Download
memory/2388-0-0x0000000074D6E000-0x0000000074D6F000-memory.dmp

Filesize
4KB

Download
memory/2388-52-0x0000000074D60000-0x0000000075510000-memory.dmp

Filesize
7.7MB

Download
memory/2388-1-0x0000000000E60000-0x0000000000F44000-memory.dmp

Filesize
912KB

Download
memory/3412-50-0x0000000005CF0000-0x0000000005D0E000-memory.dmp

Filesize
120KB

Download
memory/3412-56-0x000000006F870000-0x000000006F8BC000-memory.dmp

Filesize
304KB

Download
memory/3412-92-0x0000000074D60000-0x0000000075510000-memory.dmp

Filesize
7.7MB

Download
memory/3412-85-0x0000000007370000-0x000000000738A000-memory.dmp

Filesize
104KB

Download
memory/3412-24-0x0000000074D60000-0x0000000075510000-memory.dmp

Filesize
7.7MB

Download
memory/3412-26-0x0000000074D60000-0x0000000075510000-memory.dmp

Filesize
7.7MB

Download
memory/3412-19-0x0000000074D60000-0x0000000075510000-memory.dmp

Filesize
7.7MB

Download
memory/3412-25-0x0000000005710000-0x0000000005A64000-memory.dmp

Filesize
3.3MB

Download
memory/3412-84-0x0000000007270000-0x0000000007284000-memory.dmp

Filesize
80KB

Download
memory/3412-81-0x00000000072B0000-0x0000000007346000-memory.dmp

Filesize
600KB

Download
memory/3412-80-0x00000000070A0000-0x00000000070AA000-memory.dmp

Filesize
40KB

Download
memory/3412-79-0x0000000007030000-0x000000000704A000-memory.dmp

Filesize
104KB

Download
memory/3412-78-0x0000000007670000-0x0000000007CEA000-memory.dmp

Filesize
6.5MB

Download
memory/3412-51-0x0000000005D80000-0x0000000005DCC000-memory.dmp

Filesize
304KB

Download
memory/3412-77-0x0000000006F00000-0x0000000006FA3000-memory.dmp

Filesize
652KB

Download
memory/3412-75-0x00000000062C0000-0x00000000062DE000-memory.dmp

Filesize
120KB

Download
memory/3412-55-0x0000000006EC0000-0x0000000006EF2000-memory.dmp

Filesize
200KB

Download
memory/3568-18-0x0000000074D60000-0x0000000075510000-memory.dmp

Filesize
7.7MB

Download
memory/3568-22-0x0000000005F20000-0x0000000005F86000-memory.dmp

Filesize
408KB

Download
memory/3568-93-0x0000000074D60000-0x0000000075510000-memory.dmp

Filesize
7.7MB

Download
memory/3568-20-0x0000000005590000-0x00000000055B2000-memory.dmp

Filesize
136KB

Download
memory/3568-17-0x00000000057F0000-0x0000000005E18000-memory.dmp

Filesize
6.2MB

Download
memory/3568-21-0x0000000005730000-0x0000000005796000-memory.dmp

Filesize
408KB

Download
memory/3568-15-0x0000000074D60000-0x0000000075510000-memory.dmp

Filesize
7.7MB

Download
memory/3568-16-0x0000000002D40000-0x0000000002D76000-memory.dmp

Filesize
216KB

Download
memory/3568-57-0x000000006F870000-0x000000006F8BC000-memory.dmp

Filesize
304KB

Download
memory/3568-82-0x0000000007BF0000-0x0000000007C01000-memory.dmp

Filesize
68KB

Download
memory/3568-83-0x0000000007C20000-0x0000000007C2E000-memory.dmp

Filesize
56KB

Download
memory/3568-86-0x0000000007D10000-0x0000000007D18000-memory.dmp

Filesize
32KB

Download
memory/4488-46-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4488-100-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4488-49-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4488-48-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4488-53-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4488-54-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4488-94-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4488-95-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4488-96-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4488-45-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4488-99-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4488-101-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4488-102-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4488-103-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4488-104-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4488-105-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4488-106-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download