remcos | dec26f7cc646acdff30d90fae8837623c70870ed0cc9020930f95b53b6b730db

Analysis

max time kernel
149s
max time network
145s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
02/12/2024, 13:12

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General

Target

RFQ_PX2_MULE2024_Travco_Engineering_Construction_PDF.exe
Size

1.3MB
MD5

973306ff45c5b4ee7333db7a5ef7a0f9
SHA1

32c7065633f821f72f2c2af4a572414cdd79ea91
SHA256

dec26f7cc646acdff30d90fae8837623c70870ed0cc9020930f95b53b6b730db
SHA512

2d703af64af2c213de8e92ab0fa77d692f55f15c3e85d4f5aa4eb6fc049b2ab36ef8ac7b25a85c06aef8eb22972e5103fb5533288f9f9cccabbbaadebc892540
SSDEEP

24576:ztb20pkaCqT5TBWgNQ7ato13PtKK5QXpdbt86F+LAisTLZ6A:wVg5tQ7at8FFOpXt+LAiY5

Score

10^/10

remcos work collection discovery rat

Malware Config

Extracted

Family

remcos

Botnet

WORK

netflixyoutubebrowser.duckdns.org:34043

Attributes

audio_folder
MicRecords
audio_path
ApplicationPath
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-CDDRK8
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Remcos family
remcos

Detected Nirsoft tools 7 IoCs

Free utilities often used by attackers which can steal passwords, product keys, etc.

resource	yara_rule
behavioral1/memory/2724-45-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/2724-49-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/3016-48-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/3016-44-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/3012-51-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/3016-56-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2724-61-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/2724-45-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/2724-49-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/2724-61-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/3016-48-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/3016-44-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/3016-56-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\schoollike.vbs	schoollike.exe

Executes dropped EXE 1 IoCs

pid	Process
2304	schoollike.exe

Loads dropped DLL 1 IoCs

pid	Process
2520	RFQ_PX2_MULE2024_Travco_Engineering_Construction_PDF.exe

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2872745919-2748461613-2989606286-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	svchost.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/files/0x0008000000016d31-8.dat	autoit_exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2304 set thread context of 2244	2304	schoollike.exe	31
PID 2244 set thread context of 3016	2244	svchost.exe	32
PID 2244 set thread context of 2724	2244	svchost.exe	33
PID 2244 set thread context of 3012	2244	svchost.exe	34

System Location Discovery: System Language Discovery 1 TTPs 6 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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RFQ_PX2_MULE2024_Travco_Engineering_Construction_PDF.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schoollike.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3016	svchost.exe
3016	svchost.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
2304	schoollike.exe
2244	svchost.exe
2244	svchost.exe
2244	svchost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3012	svchost.exe

Suspicious use of FindShellTrayWindow 4 IoCs

pid	Process
2520	RFQ_PX2_MULE2024_Travco_Engineering_Construction_PDF.exe
2520	RFQ_PX2_MULE2024_Travco_Engineering_Construction_PDF.exe
2304	schoollike.exe
2304	schoollike.exe

Suspicious use of SendNotifyMessage 4 IoCs

pid	Process
2520	RFQ_PX2_MULE2024_Travco_Engineering_Construction_PDF.exe
2520	RFQ_PX2_MULE2024_Travco_Engineering_Construction_PDF.exe
2304	schoollike.exe
2304	schoollike.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2520 wrote to memory of 2304	2520	RFQ_PX2_MULE2024_Travco_Engineering_Construction_PDF.exe	30
PID 2520 wrote to memory of 2304	2520	RFQ_PX2_MULE2024_Travco_Engineering_Construction_PDF.exe	30
PID 2520 wrote to memory of 2304	2520	RFQ_PX2_MULE2024_Travco_Engineering_Construction_PDF.exe	30
PID 2520 wrote to memory of 2304	2520	RFQ_PX2_MULE2024_Travco_Engineering_Construction_PDF.exe	30
PID 2304 wrote to memory of 2244	2304	schoollike.exe	31
PID 2304 wrote to memory of 2244	2304	schoollike.exe	31
PID 2304 wrote to memory of 2244	2304	schoollike.exe	31
PID 2304 wrote to memory of 2244	2304	schoollike.exe	31
PID 2304 wrote to memory of 2244	2304	schoollike.exe	31
PID 2244 wrote to memory of 3016	2244	svchost.exe	32
PID 2244 wrote to memory of 3016	2244	svchost.exe	32
PID 2244 wrote to memory of 3016	2244	svchost.exe	32
PID 2244 wrote to memory of 3016	2244	svchost.exe	32
PID 2244 wrote to memory of 3016	2244	svchost.exe	32
PID 2244 wrote to memory of 2724	2244	svchost.exe	33
PID 2244 wrote to memory of 2724	2244	svchost.exe	33
PID 2244 wrote to memory of 2724	2244	svchost.exe	33
PID 2244 wrote to memory of 2724	2244	svchost.exe	33
PID 2244 wrote to memory of 2724	2244	svchost.exe	33
PID 2244 wrote to memory of 3012	2244	svchost.exe	34
PID 2244 wrote to memory of 3012	2244	svchost.exe	34
PID 2244 wrote to memory of 3012	2244	svchost.exe	34
PID 2244 wrote to memory of 3012	2244	svchost.exe	34
PID 2244 wrote to memory of 3012	2244	svchost.exe	34

C:\Users\Admin\AppData\Local\Temp\RFQ_PX2_MULE2024_Travco_Engineering_Construction_PDF.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ_PX2_MULE2024_Travco_Engineering_Construction_PDF.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:2520
- C:\Users\Admin\AppData\Local\penstocks\schoollike.exe
  "C:\Users\Admin\AppData\Local\Temp\RFQ_PX2_MULE2024_Travco_Engineering_Construction_PDF.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2304
- - C:\Windows\SysWOW64\svchost.exe
    "C:\Users\Admin\AppData\Local\Temp\RFQ_PX2_MULE2024_Travco_Engineering_Construction_PDF.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:2244
  - - C:\Windows\SysWOW64\svchost.exe
      C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\pzjkshtjoynkdkoaslugsdspnogc"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:3016
  - - C:\Windows\SysWOW64\svchost.exe
      C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\rtodtredcgfpgqcejvgadqmgodqlfiw"
      4⤵
      Accesses Microsoft Outlook accounts
      System Location Discovery: System Language Discovery
      PID:2724
  - - C:\Windows\SysWOW64\svchost.exe
      C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\bvtvujoeqoxcqwyitgbbgvzpxjiuytmtma"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      PID:3012

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\pzjkshtjoynkdkoaslugsdspnogc

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
\Users\Admin\AppData\Local\penstocks\schoollike.exe

Filesize
1.3MB

MD5
973306ff45c5b4ee7333db7a5ef7a0f9

SHA1
32c7065633f821f72f2c2af4a572414cdd79ea91

SHA256
dec26f7cc646acdff30d90fae8837623c70870ed0cc9020930f95b53b6b730db

SHA512
2d703af64af2c213de8e92ab0fa77d692f55f15c3e85d4f5aa4eb6fc049b2ab36ef8ac7b25a85c06aef8eb22972e5103fb5533288f9f9cccabbbaadebc892540

Download Submit
memory/2244-62-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2244-75-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2244-69-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2244-24-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2244-25-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2244-27-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2244-28-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2244-29-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2244-30-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2244-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2244-33-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2244-68-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2244-67-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2244-65-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2244-66-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2244-74-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2244-60-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2244-70-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2244-59-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2244-73-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2244-22-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2244-72-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2244-26-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2244-58-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2244-71-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2304-20-0x00000000009C0000-0x0000000000DC0000-memory.dmp

Filesize
4.0MB

Download
memory/2520-6-0x0000000000780000-0x0000000000B80000-memory.dmp

Filesize
4.0MB

Download
memory/2724-43-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2724-61-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2724-49-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2724-45-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2724-40-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2724-38-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/3012-51-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3012-47-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3012-50-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3016-34-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/3016-56-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3016-37-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3016-41-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3016-44-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3016-48-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download