remcos | 993f261bd20b55d4a58dc129e2ef3d70ef23a7999e2d6b27d4eca2eb8b57e933

Analysis

max time kernel
148s
max time network
150s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
24-09-2024 13:27

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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
2736	powershell.exe
1484	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1956 set thread context of 2872	1956	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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegSvcs.exe
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

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
2832	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1956	PO_33948576383mth_pdf.exe
1956	PO_33948576383mth_pdf.exe
2736	powershell.exe
1484	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1956	PO_33948576383mth_pdf.exe
Token: SeDebugPrivilege	2736	powershell.exe
Token: SeDebugPrivilege	1484	powershell.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 1956 wrote to memory of 1484	1956	PO_33948576383mth_pdf.exe	31
PID 1956 wrote to memory of 1484	1956	PO_33948576383mth_pdf.exe	31
PID 1956 wrote to memory of 1484	1956	PO_33948576383mth_pdf.exe	31
PID 1956 wrote to memory of 1484	1956	PO_33948576383mth_pdf.exe	31
PID 1956 wrote to memory of 2736	1956	PO_33948576383mth_pdf.exe	33
PID 1956 wrote to memory of 2736	1956	PO_33948576383mth_pdf.exe	33
PID 1956 wrote to memory of 2736	1956	PO_33948576383mth_pdf.exe	33
PID 1956 wrote to memory of 2736	1956	PO_33948576383mth_pdf.exe	33
PID 1956 wrote to memory of 2832	1956	PO_33948576383mth_pdf.exe	35
PID 1956 wrote to memory of 2832	1956	PO_33948576383mth_pdf.exe	35
PID 1956 wrote to memory of 2832	1956	PO_33948576383mth_pdf.exe	35
PID 1956 wrote to memory of 2832	1956	PO_33948576383mth_pdf.exe	35
PID 1956 wrote to memory of 2872	1956	PO_33948576383mth_pdf.exe	37
PID 1956 wrote to memory of 2872	1956	PO_33948576383mth_pdf.exe	37
PID 1956 wrote to memory of 2872	1956	PO_33948576383mth_pdf.exe	37
PID 1956 wrote to memory of 2872	1956	PO_33948576383mth_pdf.exe	37
PID 1956 wrote to memory of 2872	1956	PO_33948576383mth_pdf.exe	37
PID 1956 wrote to memory of 2872	1956	PO_33948576383mth_pdf.exe	37
PID 1956 wrote to memory of 2872	1956	PO_33948576383mth_pdf.exe	37
PID 1956 wrote to memory of 2872	1956	PO_33948576383mth_pdf.exe	37
PID 1956 wrote to memory of 2872	1956	PO_33948576383mth_pdf.exe	37
PID 1956 wrote to memory of 2872	1956	PO_33948576383mth_pdf.exe	37
PID 1956 wrote to memory of 2872	1956	PO_33948576383mth_pdf.exe	37
PID 1956 wrote to memory of 2872	1956	PO_33948576383mth_pdf.exe	37
PID 1956 wrote to memory of 2872	1956	PO_33948576383mth_pdf.exe	37
PID 1956 wrote to memory of 2872	1956	PO_33948576383mth_pdf.exe	37
PID 1956 wrote to memory of 2872	1956	PO_33948576383mth_pdf.exe	37
PID 1956 wrote to memory of 2872	1956	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:1956
- 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:1484
- 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:2736
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\WZiSWBRtQ" /XML "C:\Users\Admin\AppData\Local\Temp\tmpFF17.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2832
- 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:2872

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpFF17.tmp

Filesize
1KB

MD5
d836000e2d3b3d730d6bb7411f88d8f9

SHA1
5cce8521e52f636eeed3c656024a74d48fe1a992

SHA256
9608b646530ca0bf74ca86494bc383b33c5ede1be3515a20e4a7f8bf9aa7604b

SHA512
d3954141d9455e58771b609b8f3478edfaf18ea4b31e1cdc223ee1dd3dd6db6e0706b1870a8e7bccd7ae5bc8a46fe3ac7f7a406efee5ea9f24d1b732da4dd9ae

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

Filesize
7KB

MD5
9c265d6dec309f8c79705daf1c53bdd9

SHA1
4ea5890aee9bd31f90d9eafc355dc0d80fed8aa4

SHA256
1b576062d2541f714015f86540eb0333f3570a9b6f7b7eb4b05455cf1671c8cd

SHA512
441421afaa5e4155efc6965d64418749a2a3188550a596affea9e220c9b9dc5d255c7aa31526df279c37d57594092dec887c2a2e1ea6f3482b3363111305ce05

Download Submit
memory/1956-0-0x00000000745FE000-0x00000000745FF000-memory.dmp

Filesize
4KB

Download
memory/1956-1-0x0000000000EE0000-0x0000000000FC4000-memory.dmp

Filesize
912KB

Download
memory/1956-2-0x00000000745F0000-0x0000000074CDE000-memory.dmp

Filesize
6.9MB

Download
memory/1956-3-0x0000000000610000-0x0000000000622000-memory.dmp

Filesize
72KB

Download
memory/1956-4-0x00000000745FE000-0x00000000745FF000-memory.dmp

Filesize
4KB

Download
memory/1956-5-0x00000000745F0000-0x0000000074CDE000-memory.dmp

Filesize
6.9MB

Download
memory/1956-6-0x00000000053A0000-0x000000000545E000-memory.dmp

Filesize
760KB

Download
memory/1956-40-0x00000000745F0000-0x0000000074CDE000-memory.dmp

Filesize
6.9MB

Download
memory/2872-27-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2872-41-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2872-38-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2872-37-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2872-35-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2872-33-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2872-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2872-29-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2872-36-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2872-23-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2872-21-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2872-19-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2872-25-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2872-39-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2872-42-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2872-43-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2872-44-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2872-45-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2872-46-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2872-47-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2872-48-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2872-49-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2872-50-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2872-52-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2872-54-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2872-56-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2872-58-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download