remcos | 4304f60f1efdc44fb82e632d7d6a15a62c8583aab914da08ec73b8bc709a209b

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
19-09-2024 12:29

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General

Target

Quotation_pdf.exe
Size

938KB
MD5

041848dfe86c9d7e4f84a3b4bf065075
SHA1

33ae188d83c9bdcfc1e7c37604011161564d1ad3
SHA256

4304f60f1efdc44fb82e632d7d6a15a62c8583aab914da08ec73b8bc709a209b
SHA512

723086e68480c295cbdd57aeda44785f83cca40ef43a166a427135d3b7969fdbfc184a975a4da20b6bc66833f168477b13a50306f66ac5dcdbe95998514f6648
SSDEEP

24576:OiwEHfhzre4gZVF4tspROMsDInpvmMB/pAzDbY:/7SF4toYFqUDU

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
2536	powershell.exe
2276	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2504 set thread context of 2728	2504	Quotation_pdf.exe	38

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	Quotation_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	Quotation_pdf.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
2696	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2504	Quotation_pdf.exe
2504	Quotation_pdf.exe
2504	Quotation_pdf.exe
2504	Quotation_pdf.exe
2276	powershell.exe
2536	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2504	Quotation_pdf.exe
Token: SeDebugPrivilege	2276	powershell.exe
Token: SeDebugPrivilege	2536	powershell.exe

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 2504 wrote to memory of 2536	2504	Quotation_pdf.exe	31
PID 2504 wrote to memory of 2536	2504	Quotation_pdf.exe	31
PID 2504 wrote to memory of 2536	2504	Quotation_pdf.exe	31
PID 2504 wrote to memory of 2536	2504	Quotation_pdf.exe	31
PID 2504 wrote to memory of 2276	2504	Quotation_pdf.exe	33
PID 2504 wrote to memory of 2276	2504	Quotation_pdf.exe	33
PID 2504 wrote to memory of 2276	2504	Quotation_pdf.exe	33
PID 2504 wrote to memory of 2276	2504	Quotation_pdf.exe	33
PID 2504 wrote to memory of 2696	2504	Quotation_pdf.exe	35
PID 2504 wrote to memory of 2696	2504	Quotation_pdf.exe	35
PID 2504 wrote to memory of 2696	2504	Quotation_pdf.exe	35
PID 2504 wrote to memory of 2696	2504	Quotation_pdf.exe	35
PID 2504 wrote to memory of 2684	2504	Quotation_pdf.exe	37
PID 2504 wrote to memory of 2684	2504	Quotation_pdf.exe	37
PID 2504 wrote to memory of 2684	2504	Quotation_pdf.exe	37
PID 2504 wrote to memory of 2684	2504	Quotation_pdf.exe	37
PID 2504 wrote to memory of 2728	2504	Quotation_pdf.exe	38
PID 2504 wrote to memory of 2728	2504	Quotation_pdf.exe	38
PID 2504 wrote to memory of 2728	2504	Quotation_pdf.exe	38
PID 2504 wrote to memory of 2728	2504	Quotation_pdf.exe	38
PID 2504 wrote to memory of 2728	2504	Quotation_pdf.exe	38
PID 2504 wrote to memory of 2728	2504	Quotation_pdf.exe	38
PID 2504 wrote to memory of 2728	2504	Quotation_pdf.exe	38
PID 2504 wrote to memory of 2728	2504	Quotation_pdf.exe	38
PID 2504 wrote to memory of 2728	2504	Quotation_pdf.exe	38
PID 2504 wrote to memory of 2728	2504	Quotation_pdf.exe	38
PID 2504 wrote to memory of 2728	2504	Quotation_pdf.exe	38
PID 2504 wrote to memory of 2728	2504	Quotation_pdf.exe	38
PID 2504 wrote to memory of 2728	2504	Quotation_pdf.exe	38

C:\Users\Admin\AppData\Local\Temp\Quotation_pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Quotation_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:2504
- 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:2536
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\rxEKvCaIrm.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2276
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\rxEKvCaIrm" /XML "C:\Users\Admin\AppData\Local\Temp\tmpD99D.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2696
- C:\Users\Admin\AppData\Local\Temp\Quotation_pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Quotation_pdf.exe"
  2⤵
  PID:2684
- 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:2728

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\tmpD99D.tmp

Filesize
1KB

MD5
67655e7e195c4ff1041c98ed10e54f17

SHA1
f9e9e42a0cbbdb4818a58c365beb3cdc3ce982e9

SHA256
926e7793639069aa0b02eae6a58ffc12ead25cbdcefbbf7956a8eea9eea843ba

SHA512
dc433538396e26b35bff3b781f87552904272e90c002ab9f3d16b8e9775f782e98d749e48cab13f1e562f761132e6fa11b1365652002de2d5aa33fac140bc813

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\CU6HMZ9PR53AKND7XK5F.temp

Filesize
7KB

MD5
5190f66550ab047a77578bb174ad7f94

SHA1
48251d998a5dd99133c759c3ca5aad31e7549a3a

SHA256
aa769a4e1128dc3aa914e7871c0b359bb02fdf1bf97768adeb03d29407e214a3

SHA512
e2a481bec738d85b8df38dba5d897b336ca7741b16fe582c794e0ea4d7f60bb0001289b32ac552c8d90d5100f4c3af27ffdd88c0a6f02231a182424b5eb9b699

Download Submit
memory/2504-0-0x000000007411E000-0x000000007411F000-memory.dmp

Filesize
4KB

Download
memory/2504-1-0x00000000011A0000-0x0000000001290000-memory.dmp

Filesize
960KB

Download
memory/2504-2-0x0000000074110000-0x00000000747FE000-memory.dmp

Filesize
6.9MB

Download
memory/2504-3-0x00000000004C0000-0x00000000004D0000-memory.dmp

Filesize
64KB

Download
memory/2504-4-0x000000007411E000-0x000000007411F000-memory.dmp

Filesize
4KB

Download
memory/2504-5-0x0000000074110000-0x00000000747FE000-memory.dmp

Filesize
6.9MB

Download
memory/2504-6-0x0000000005700000-0x00000000057BE000-memory.dmp

Filesize
760KB

Download
memory/2504-40-0x0000000074110000-0x00000000747FE000-memory.dmp

Filesize
6.9MB

Download
memory/2728-23-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2728-41-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2728-36-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2728-35-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2728-33-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2728-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2728-27-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2728-25-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2728-39-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2728-37-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2728-29-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2728-21-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2728-19-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2728-38-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2728-42-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2728-43-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2728-44-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2728-45-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2728-48-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2728-49-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2728-50-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2728-51-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2728-52-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2728-53-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2728-54-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2728-55-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download