remcos | 993f261bd20b55d4a58dc129e2ef3d70ef23a7999e2d6b27d4eca2eb8b57e933

Analysis

max time kernel
148s
max time network
146s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
25-09-2024 00:44

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General

Target

PO33948576383mthpdf.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
2940	powershell.exe
2752	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2132 set thread context of 2692	2132	PO33948576383mthpdf.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	PO33948576383mthpdf.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
2764	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2132	PO33948576383mthpdf.exe
2940	powershell.exe
2752	powershell.exe
2132	PO33948576383mthpdf.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2132	PO33948576383mthpdf.exe
Token: SeDebugPrivilege	2940	powershell.exe
Token: SeDebugPrivilege	2752	powershell.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 2132 wrote to memory of 2940	2132	PO33948576383mthpdf.exe	31
PID 2132 wrote to memory of 2940	2132	PO33948576383mthpdf.exe	31
PID 2132 wrote to memory of 2940	2132	PO33948576383mthpdf.exe	31
PID 2132 wrote to memory of 2940	2132	PO33948576383mthpdf.exe	31
PID 2132 wrote to memory of 2752	2132	PO33948576383mthpdf.exe	33
PID 2132 wrote to memory of 2752	2132	PO33948576383mthpdf.exe	33
PID 2132 wrote to memory of 2752	2132	PO33948576383mthpdf.exe	33
PID 2132 wrote to memory of 2752	2132	PO33948576383mthpdf.exe	33
PID 2132 wrote to memory of 2764	2132	PO33948576383mthpdf.exe	34
PID 2132 wrote to memory of 2764	2132	PO33948576383mthpdf.exe	34
PID 2132 wrote to memory of 2764	2132	PO33948576383mthpdf.exe	34
PID 2132 wrote to memory of 2764	2132	PO33948576383mthpdf.exe	34
PID 2132 wrote to memory of 2692	2132	PO33948576383mthpdf.exe	37
PID 2132 wrote to memory of 2692	2132	PO33948576383mthpdf.exe	37
PID 2132 wrote to memory of 2692	2132	PO33948576383mthpdf.exe	37
PID 2132 wrote to memory of 2692	2132	PO33948576383mthpdf.exe	37
PID 2132 wrote to memory of 2692	2132	PO33948576383mthpdf.exe	37
PID 2132 wrote to memory of 2692	2132	PO33948576383mthpdf.exe	37
PID 2132 wrote to memory of 2692	2132	PO33948576383mthpdf.exe	37
PID 2132 wrote to memory of 2692	2132	PO33948576383mthpdf.exe	37
PID 2132 wrote to memory of 2692	2132	PO33948576383mthpdf.exe	37
PID 2132 wrote to memory of 2692	2132	PO33948576383mthpdf.exe	37
PID 2132 wrote to memory of 2692	2132	PO33948576383mthpdf.exe	37
PID 2132 wrote to memory of 2692	2132	PO33948576383mthpdf.exe	37
PID 2132 wrote to memory of 2692	2132	PO33948576383mthpdf.exe	37
PID 2132 wrote to memory of 2692	2132	PO33948576383mthpdf.exe	37
PID 2132 wrote to memory of 2692	2132	PO33948576383mthpdf.exe	37
PID 2132 wrote to memory of 2692	2132	PO33948576383mthpdf.exe	37

C:\Users\Admin\AppData\Local\Temp\PO33948576383mthpdf.exe
"C:\Users\Admin\AppData\Local\Temp\PO33948576383mthpdf.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2132
- 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\PO33948576383mthpdf.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2940
- 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:2752
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\WZiSWBRtQ" /XML "C:\Users\Admin\AppData\Local\Temp\tmp3F.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2764
- 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:2692

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\tmp3F.tmp

Filesize
1KB

MD5
d771608b1c2f71d159af35498a2dd31e

SHA1
bcedef22c2e2b9f69928423e5a642dbb5b60f3d8

SHA256
7477162473601c572d766284ea2a14c427e8f7b411834f69a04d582388d8e2dd

SHA512
0fe25a66aed017520e6fc17cb9300496273a39f196a2d46d0883a97d29052f044d14f901218336e6f03f276abd37f62eac209e5c730419379259f8f0fe00cf7d

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\E7ZOEWMXMNKUTCDILHKU.temp

Filesize
7KB

MD5
6f35e58704bdfb38a04f0e75f02578e2

SHA1
61aabfc3c7bfad347048ef074879e631507951c5

SHA256
b5a881e5ccd40804736b6cf89779512c54614d7f26db5c51aa5b0435aaa5b991

SHA512
0f78705afdc052636571b36945508fe8566bccc3b3bd5f801a01debbecd35413358cdd97f33fcb39bea87c23b0799ef18a8c7c876f8459f8160f773e339a5ed5

Download Submit
memory/2132-0-0x0000000074DAE000-0x0000000074DAF000-memory.dmp

Filesize
4KB

Download
memory/2132-1-0x00000000001C0000-0x00000000002A4000-memory.dmp

Filesize
912KB

Download
memory/2132-2-0x0000000074DA0000-0x000000007548E000-memory.dmp

Filesize
6.9MB

Download
memory/2132-3-0x0000000000630000-0x0000000000642000-memory.dmp

Filesize
72KB

Download
memory/2132-4-0x0000000074DAE000-0x0000000074DAF000-memory.dmp

Filesize
4KB

Download
memory/2132-5-0x0000000074DA0000-0x000000007548E000-memory.dmp

Filesize
6.9MB

Download
memory/2132-6-0x00000000053E0000-0x000000000549E000-memory.dmp

Filesize
760KB

Download
memory/2132-40-0x0000000074DA0000-0x000000007548E000-memory.dmp

Filesize
6.9MB

Download
memory/2692-27-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-41-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-36-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-39-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-37-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-35-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2692-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-29-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-33-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-25-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-23-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-38-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-21-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-19-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-42-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-43-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-44-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-45-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-48-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-49-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-50-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-51-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-52-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-53-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-54-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-55-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download