remcos | 8f2c4543e4bc9194d1c1a9bc946a75d49162b0eee2715df4ba626980892107b5

Analysis

max time kernel
147s
max time network
145s
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 14:18

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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
1580	powershell.exe
2900	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-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	Quotation_pdf.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3664 set thread context of 4624	3664	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	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
5076	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3664	Quotation_pdf.exe
1580	powershell.exe
2900	powershell.exe
3664	Quotation_pdf.exe
1580	powershell.exe
2900	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3664	Quotation_pdf.exe
Token: SeDebugPrivilege	1580	powershell.exe
Token: SeDebugPrivilege	2900	powershell.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 3664 wrote to memory of 1580	3664	Quotation_pdf.exe	89
PID 3664 wrote to memory of 1580	3664	Quotation_pdf.exe	89
PID 3664 wrote to memory of 1580	3664	Quotation_pdf.exe	89
PID 3664 wrote to memory of 2900	3664	Quotation_pdf.exe	91
PID 3664 wrote to memory of 2900	3664	Quotation_pdf.exe	91
PID 3664 wrote to memory of 2900	3664	Quotation_pdf.exe	91
PID 3664 wrote to memory of 5076	3664	Quotation_pdf.exe	93
PID 3664 wrote to memory of 5076	3664	Quotation_pdf.exe	93
PID 3664 wrote to memory of 5076	3664	Quotation_pdf.exe	93
PID 3664 wrote to memory of 4624	3664	Quotation_pdf.exe	95
PID 3664 wrote to memory of 4624	3664	Quotation_pdf.exe	95
PID 3664 wrote to memory of 4624	3664	Quotation_pdf.exe	95
PID 3664 wrote to memory of 4624	3664	Quotation_pdf.exe	95
PID 3664 wrote to memory of 4624	3664	Quotation_pdf.exe	95
PID 3664 wrote to memory of 4624	3664	Quotation_pdf.exe	95
PID 3664 wrote to memory of 4624	3664	Quotation_pdf.exe	95
PID 3664 wrote to memory of 4624	3664	Quotation_pdf.exe	95
PID 3664 wrote to memory of 4624	3664	Quotation_pdf.exe	95
PID 3664 wrote to memory of 4624	3664	Quotation_pdf.exe	95
PID 3664 wrote to memory of 4624	3664	Quotation_pdf.exe	95
PID 3664 wrote to memory of 4624	3664	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:3664
- 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:1580
- 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:2900
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\efsOOkOP" /XML "C:\Users\Admin\AppData\Local\Temp\tmpBDC2.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:5076
- 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:4624

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
3d086a433708053f9bf9523e1d87a4e8

SHA1
b3ab5d4f282a4c8fe8c3005b8a557ed5a0e37f28

SHA256
6f8fd1b8d9788ad54eaeee329232187e24b7b43393a01aeba2d6e9675231fb69

SHA512
931ae42b4c68a4507ff2342332b08eb407050d47cf4176137ea022d0f6e513c689e998445a04c6d18d4877391705c586bfce0234632b898d41aaed0957996dfd

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

Filesize
18KB

MD5
cde6b01727911acd8e0404e6cbdeb8fa

SHA1
f47e11fd21ba89e219f9de1fcc1dca647f179f9b

SHA256
df6c5714bdacf3312f2d4f6beda253014b35583607fd950ed0dde1e46ca8eca3

SHA512
37e9ed3340042f13ae6bf90660650f9687d5d21ac3976938ff852b19f972c3791cca4bd83df4ff990cefa1c8884d5a83163f8f71ceae063cfd0dcabd256e80fc

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_q5yjn5qi.41f.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpBDC2.tmp

Filesize
1KB

MD5
81e99b508b58bf04f2f71da4f80731d3

SHA1
1741799da6b1ee8194e63acfbf72de73bc4bed87

SHA256
f8bb0c4c730422771aaf441e641c0b27621c3474242b3f337d835f7be5624b21

SHA512
341e7f6a5051ff8e1ccc46e20901c85ea1409af04e22d1085bd6c43892cc06657febc19667b1aae5617df1b49a5ec83a6d610dd319a357fe98c2145f1d5396e6

Download Submit
memory/1580-84-0x0000000007E10000-0x0000000007E2A000-memory.dmp

Filesize
104KB

Download
memory/1580-23-0x00000000060D0000-0x0000000006136000-memory.dmp

Filesize
408KB

Download
memory/1580-55-0x0000000075A10000-0x0000000075A5C000-memory.dmp

Filesize
304KB

Download
memory/1580-78-0x0000000007AD0000-0x0000000007AEA000-memory.dmp

Filesize
104KB

Download
memory/1580-65-0x0000000006D80000-0x0000000006D9E000-memory.dmp

Filesize
120KB

Download
memory/1580-91-0x0000000075160000-0x0000000075910000-memory.dmp

Filesize
7.7MB

Download
memory/1580-85-0x0000000007DF0000-0x0000000007DF8000-memory.dmp

Filesize
32KB

Download
memory/1580-15-0x0000000002EB0000-0x0000000002EE6000-memory.dmp

Filesize
216KB

Download
memory/1580-16-0x0000000075160000-0x0000000075910000-memory.dmp

Filesize
7.7MB

Download
memory/1580-18-0x0000000075160000-0x0000000075910000-memory.dmp

Filesize
7.7MB

Download
memory/1580-17-0x00000000058B0000-0x0000000005ED8000-memory.dmp

Filesize
6.2MB

Download
memory/1580-19-0x0000000075160000-0x0000000075910000-memory.dmp

Filesize
7.7MB

Download
memory/1580-79-0x0000000007B50000-0x0000000007B5A000-memory.dmp

Filesize
40KB

Download
memory/1580-44-0x00000000061B0000-0x0000000006504000-memory.dmp

Filesize
3.3MB

Download
memory/1580-22-0x00000000057D0000-0x00000000057F2000-memory.dmp

Filesize
136KB

Download
memory/1580-54-0x0000000007750000-0x0000000007782000-memory.dmp

Filesize
200KB

Download
memory/1580-24-0x0000000006140000-0x00000000061A6000-memory.dmp

Filesize
408KB

Download
memory/2900-83-0x00000000070B0000-0x00000000070C4000-memory.dmp

Filesize
80KB

Download
memory/2900-21-0x0000000075160000-0x0000000075910000-memory.dmp

Filesize
7.7MB

Download
memory/2900-82-0x00000000070A0000-0x00000000070AE000-memory.dmp

Filesize
56KB

Download
memory/2900-81-0x0000000007070000-0x0000000007081000-memory.dmp

Filesize
68KB

Download
memory/2900-80-0x00000000070F0000-0x0000000007186000-memory.dmp

Filesize
600KB

Download
memory/2900-20-0x0000000075160000-0x0000000075910000-memory.dmp

Filesize
7.7MB

Download
memory/2900-77-0x00000000074C0000-0x0000000007B3A000-memory.dmp

Filesize
6.5MB

Download
memory/2900-66-0x0000000075A10000-0x0000000075A5C000-memory.dmp

Filesize
304KB

Download
memory/2900-51-0x0000000005B30000-0x0000000005B4E000-memory.dmp

Filesize
120KB

Download
memory/2900-52-0x0000000005BD0000-0x0000000005C1C000-memory.dmp

Filesize
304KB

Download
memory/2900-92-0x0000000075160000-0x0000000075910000-memory.dmp

Filesize
7.7MB

Download
memory/2900-76-0x0000000006D20000-0x0000000006DC3000-memory.dmp

Filesize
652KB

Download
memory/3664-8-0x0000000075160000-0x0000000075910000-memory.dmp

Filesize
7.7MB

Download
memory/3664-10-0x00000000093B0000-0x000000000944C000-memory.dmp

Filesize
624KB

Download
memory/3664-5-0x00000000051F0000-0x00000000051FA000-memory.dmp

Filesize
40KB

Download
memory/3664-6-0x0000000006850000-0x0000000006862000-memory.dmp

Filesize
72KB

Download
memory/3664-7-0x000000007516E000-0x000000007516F000-memory.dmp

Filesize
4KB

Download
memory/3664-3-0x0000000005200000-0x0000000005292000-memory.dmp

Filesize
584KB

Download
memory/3664-9-0x0000000006CE0000-0x0000000006D9E000-memory.dmp

Filesize
760KB

Download
memory/3664-1-0x0000000000710000-0x00000000007F4000-memory.dmp

Filesize
912KB

Download
memory/3664-50-0x0000000075160000-0x0000000075910000-memory.dmp

Filesize
7.7MB

Download
memory/3664-2-0x0000000005710000-0x0000000005CB4000-memory.dmp

Filesize
5.6MB

Download
memory/3664-4-0x0000000075160000-0x0000000075910000-memory.dmp

Filesize
7.7MB

Download
memory/3664-0-0x000000007516E000-0x000000007516F000-memory.dmp

Filesize
4KB

Download
memory/4624-46-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4624-99-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4624-48-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4624-47-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4624-53-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4624-93-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4624-94-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4624-95-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4624-96-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4624-45-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4624-100-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4624-102-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4624-101-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4624-103-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4624-104-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4624-105-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4624-106-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download