remcos | 3c0f9981e85d84d77fbba8ee32632a07c6fcee5ec7570a7d1b854f02ed3374d4

Analysis

max time kernel
148s
max time network
148s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
24-09-2024 14:07

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General

Target

PO_33948576383mth_pdf.exe
Size

889KB
MD5

f0689dfa240f533acc8079bcbff064e8
SHA1

b4f9d193d9ff8f0302af25212dffc67292fb752c
SHA256

993f261bd20b55d4a58dc129e2ef3d70ef23a7999e2d6b27d4eca2eb8b57e933
SHA512

12dcb5d05a8811ca7070a98acd844117097849044031920559d7043059d803effb54fe6f0cd0b579e899c964439f9929db6c00afbd6616cf2e949ab2df9c40b4
SSDEEP

24576:EnHNRRr5sff/UYS2DzidV2P6ktb8amzIoI:EnHNRRr5Q0YS2ydwR8TI

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
2792	powershell.exe
2796	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1736 set thread context of 2712	1736	PO_33948576383mth_pdf.exe	37

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	PO_33948576383mth_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	RegSvcs.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
2704	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1736	PO_33948576383mth_pdf.exe
2792	powershell.exe
2796	powershell.exe
1736	PO_33948576383mth_pdf.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1736	PO_33948576383mth_pdf.exe
Token: SeDebugPrivilege	2792	powershell.exe
Token: SeDebugPrivilege	2796	powershell.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 1736 wrote to memory of 2792	1736	PO_33948576383mth_pdf.exe	31
PID 1736 wrote to memory of 2792	1736	PO_33948576383mth_pdf.exe	31
PID 1736 wrote to memory of 2792	1736	PO_33948576383mth_pdf.exe	31
PID 1736 wrote to memory of 2792	1736	PO_33948576383mth_pdf.exe	31
PID 1736 wrote to memory of 2796	1736	PO_33948576383mth_pdf.exe	33
PID 1736 wrote to memory of 2796	1736	PO_33948576383mth_pdf.exe	33
PID 1736 wrote to memory of 2796	1736	PO_33948576383mth_pdf.exe	33
PID 1736 wrote to memory of 2796	1736	PO_33948576383mth_pdf.exe	33
PID 1736 wrote to memory of 2704	1736	PO_33948576383mth_pdf.exe	34
PID 1736 wrote to memory of 2704	1736	PO_33948576383mth_pdf.exe	34
PID 1736 wrote to memory of 2704	1736	PO_33948576383mth_pdf.exe	34
PID 1736 wrote to memory of 2704	1736	PO_33948576383mth_pdf.exe	34
PID 1736 wrote to memory of 2712	1736	PO_33948576383mth_pdf.exe	37
PID 1736 wrote to memory of 2712	1736	PO_33948576383mth_pdf.exe	37
PID 1736 wrote to memory of 2712	1736	PO_33948576383mth_pdf.exe	37
PID 1736 wrote to memory of 2712	1736	PO_33948576383mth_pdf.exe	37
PID 1736 wrote to memory of 2712	1736	PO_33948576383mth_pdf.exe	37
PID 1736 wrote to memory of 2712	1736	PO_33948576383mth_pdf.exe	37
PID 1736 wrote to memory of 2712	1736	PO_33948576383mth_pdf.exe	37
PID 1736 wrote to memory of 2712	1736	PO_33948576383mth_pdf.exe	37
PID 1736 wrote to memory of 2712	1736	PO_33948576383mth_pdf.exe	37
PID 1736 wrote to memory of 2712	1736	PO_33948576383mth_pdf.exe	37
PID 1736 wrote to memory of 2712	1736	PO_33948576383mth_pdf.exe	37
PID 1736 wrote to memory of 2712	1736	PO_33948576383mth_pdf.exe	37
PID 1736 wrote to memory of 2712	1736	PO_33948576383mth_pdf.exe	37
PID 1736 wrote to memory of 2712	1736	PO_33948576383mth_pdf.exe	37
PID 1736 wrote to memory of 2712	1736	PO_33948576383mth_pdf.exe	37
PID 1736 wrote to memory of 2712	1736	PO_33948576383mth_pdf.exe	37

C:\Users\Admin\AppData\Local\Temp\PO_33948576383mth_pdf.exe
"C:\Users\Admin\AppData\Local\Temp\PO_33948576383mth_pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1736
- 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\PO_33948576383mth_pdf.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2792
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\WZiSWBRtQ.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2796
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\WZiSWBRtQ" /XML "C:\Users\Admin\AppData\Local\Temp\tmpCE18.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2704
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2712

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

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\Temp\tmpCE18.tmp

Filesize
1KB

MD5
eea8816996ba8850b597709408c68b98

SHA1
fa0e771150d9c8678db16892e67a9af5a25449a7

SHA256
a84633d37d7707b803c23cbdde85f7240509eddb061af37fc1f98638a0009f53

SHA512
9793d5ed53fd1061bf7dbc6e7f69083385f5aae0ad83171fe602be97d4af605371434c27d0bf257eb88b09d826446ccc1fbc2c4602ebd5e9fb1b1553a7667ed7

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

Filesize
7KB

MD5
937521426534f1d061d65c1fe25466ba

SHA1
ca5c83e7727b3d8624e8fee13daf7aef7dbd09d9

SHA256
61e873a288b1182868090ed9a9686cb78a856e893231a4d9cdb470e88933d335

SHA512
159faebf0f7e694523c11e411f8c1f59abf018946c61760f3b4f964e4b75be6c48e1befbdff17eaa6adece8f76df725ecea15fe3c54c2cf0fb878a918abde9bb

Download Submit
memory/1736-0-0x000000007427E000-0x000000007427F000-memory.dmp

Filesize
4KB

Download
memory/1736-1-0x00000000000D0000-0x00000000001B4000-memory.dmp

Filesize
912KB

Download
memory/1736-2-0x0000000074270000-0x000000007495E000-memory.dmp

Filesize
6.9MB

Download
memory/1736-3-0x00000000004E0000-0x00000000004F2000-memory.dmp

Filesize
72KB

Download
memory/1736-4-0x000000007427E000-0x000000007427F000-memory.dmp

Filesize
4KB

Download
memory/1736-5-0x0000000074270000-0x000000007495E000-memory.dmp

Filesize
6.9MB

Download
memory/1736-6-0x00000000053F0000-0x00000000054AE000-memory.dmp

Filesize
760KB

Download
memory/1736-40-0x0000000074270000-0x000000007495E000-memory.dmp

Filesize
6.9MB

Download
memory/2712-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2712-21-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2712-37-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2712-36-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2712-35-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2712-33-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2712-39-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2712-29-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2712-27-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2712-25-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2712-23-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2712-38-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2712-19-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2712-41-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2712-42-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2712-44-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2712-43-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2712-45-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2712-48-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2712-49-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2712-50-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2712-51-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2712-52-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download