remcos | 842c192bb3c1902f893da4f45a77aaeeda049c84055f237b113dc380c0e6e6f4

Analysis

max time kernel
297s
max time network
277s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
02-12-2024 13:54

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General

Target

FDR9876567000.exe
Size

833KB
MD5

c517ecc1d57af03affdd6945e1b618d8
SHA1

5c5174ebdf5902ada7c5899b6c0b98f2db363372
SHA256

9a32e0821da4466b858ecfd185f3d9bff232d8a3b44983988c248df05ef7c2ef
SHA512

355c1f39946662b0c16c6a5fa4c387aad03e1dc1c1dd74d650a784fc9e718b890a877937d8d3a26ab62a22385f03e02e6d0faa6d9e07ea3b16151c909596097a
SSDEEP

12288:5quErHF6xC9D6DmR1J98w4oknqOOCyQfY7nPIsUgzp6x0hFxZAXFbuFb7anFbq44:Mrl6kD68JmlotQfgEYpOqFxTlaVXSxz

Score

10^/10

remcos remotehost collection discovery rat spyware stealer upx

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

192.210.150.26:8787

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-R1T905
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 3 IoCs

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

Processes:

resource	yara_rule
behavioral2/memory/4576-169-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4576-163-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/2704-171-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

Processes:

resource	yara_rule
behavioral2/memory/4576-169-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/4576-163-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

Processes:

resource	yara_rule
behavioral2/memory/2704-171-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Drops startup file 1 IoCs

Processes:

ectosphere.exe

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

Executes dropped EXE 5 IoCs

Processes:

ectosphere.exeectosphere.exeectosphere.exeectosphere.exeectosphere.exe

pid	Process
2580	ectosphere.exe
2704	ectosphere.exe
3936	ectosphere.exe
4576	ectosphere.exe
3956	ectosphere.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

Processes:

ectosphere.exe

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	ectosphere.exe

AutoIT Executable 3 IoCs

AutoIT scripts compiled to PE executables.

Processes:

resource	yara_rule
behavioral2/memory/4932-13-0x0000000000560000-0x000000000072E000-memory.dmp	autoit_exe
behavioral2/memory/2580-22-0x0000000001350000-0x0000000001750000-memory.dmp	autoit_exe
behavioral2/memory/2580-36-0x00000000008E0000-0x0000000000AAE000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

ectosphere.exe

description	pid	Process	procid_target
PID 2580 set thread context of 2704	2580	ectosphere.exe	92
PID 2580 set thread context of 4576	2580	ectosphere.exe	94
PID 2580 set thread context of 3956	2580	ectosphere.exe	95

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral2/memory/4932-0-0x0000000000560000-0x000000000072E000-memory.dmp	upx
behavioral2/files/0x0007000000023cb3-10.dat	upx
behavioral2/memory/2580-11-0x00000000008E0000-0x0000000000AAE000-memory.dmp	upx
behavioral2/memory/4932-13-0x0000000000560000-0x000000000072E000-memory.dmp	upx
behavioral2/memory/2580-36-0x00000000008E0000-0x0000000000AAE000-memory.dmp	upx

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

Processes:

FDR9876567000.exeectosphere.exeectosphere.exeectosphere.exeectosphere.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	FDR9876567000.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ectosphere.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ectosphere.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ectosphere.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ectosphere.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

ectosphere.exeectosphere.exe

pid	Process
2704	ectosphere.exe
2704	ectosphere.exe
3956	ectosphere.exe
3956	ectosphere.exe
2704	ectosphere.exe
2704	ectosphere.exe

Suspicious behavior: MapViewOfSection 4 IoCs

Processes:

ectosphere.exe

pid	Process
2580	ectosphere.exe
2580	ectosphere.exe
2580	ectosphere.exe
2580	ectosphere.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

ectosphere.exe

description	pid	Process
Token: SeDebugPrivilege	3956	ectosphere.exe

Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

FDR9876567000.exeectosphere.exe

pid	Process
4932	FDR9876567000.exe
4932	FDR9876567000.exe
2580	ectosphere.exe
2580	ectosphere.exe

Suspicious use of SendNotifyMessage 4 IoCs

Processes:

FDR9876567000.exeectosphere.exe

pid	Process
4932	FDR9876567000.exe
4932	FDR9876567000.exe
2580	ectosphere.exe
2580	ectosphere.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

FDR9876567000.exeectosphere.exe

description	pid	Process	procid_target
PID 4932 wrote to memory of 2580	4932	FDR9876567000.exe	82
PID 4932 wrote to memory of 2580	4932	FDR9876567000.exe	82
PID 4932 wrote to memory of 2580	4932	FDR9876567000.exe	82
PID 2580 wrote to memory of 2704	2580	ectosphere.exe	92
PID 2580 wrote to memory of 2704	2580	ectosphere.exe	92
PID 2580 wrote to memory of 2704	2580	ectosphere.exe	92
PID 2580 wrote to memory of 2704	2580	ectosphere.exe	92
PID 2580 wrote to memory of 3936	2580	ectosphere.exe	93
PID 2580 wrote to memory of 3936	2580	ectosphere.exe	93
PID 2580 wrote to memory of 3936	2580	ectosphere.exe	93
PID 2580 wrote to memory of 4576	2580	ectosphere.exe	94
PID 2580 wrote to memory of 4576	2580	ectosphere.exe	94
PID 2580 wrote to memory of 4576	2580	ectosphere.exe	94
PID 2580 wrote to memory of 4576	2580	ectosphere.exe	94
PID 2580 wrote to memory of 3956	2580	ectosphere.exe	95
PID 2580 wrote to memory of 3956	2580	ectosphere.exe	95
PID 2580 wrote to memory of 3956	2580	ectosphere.exe	95
PID 2580 wrote to memory of 3956	2580	ectosphere.exe	95

C:\Users\Admin\AppData\Local\Temp\FDR9876567000.exe
"C:\Users\Admin\AppData\Local\Temp\FDR9876567000.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:4932
- C:\Users\Admin\AppData\Local\snails\ectosphere.exe
  "C:\Users\Admin\AppData\Local\Temp\FDR9876567000.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:2580
- - C:\Users\Admin\AppData\Local\snails\ectosphere.exe
    C:\Users\Admin\AppData\Local\snails\ectosphere.exe /stext "C:\Users\Admin\AppData\Local\Temp\ayaihofcivzsykmj"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:2704
- - C:\Users\Admin\AppData\Local\snails\ectosphere.exe
    C:\Users\Admin\AppData\Local\snails\ectosphere.exe /stext "C:\Users\Admin\AppData\Local\Temp\csfbihqdwdrxjqandej"
    3⤵
    - Executes dropped EXE
    PID:3936
- - C:\Users\Admin\AppData\Local\snails\ectosphere.exe
    C:\Users\Admin\AppData\Local\snails\ectosphere.exe /stext "C:\Users\Admin\AppData\Local\Temp\csfbihqdwdrxjqandej"
    3⤵
    - Executes dropped EXE
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:4576
- - C:\Users\Admin\AppData\Local\snails\ectosphere.exe
    C:\Users\Admin\AppData\Local\snails\ectosphere.exe /stext "C:\Users\Admin\AppData\Local\Temp\nuktizbxkljklwwzmpwnmi"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3956

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
1bee5470641c3bf5a607b60c88a63865

SHA1
17f33356517c58acda13185bd36af205221afc1f

SHA256
d19d7bfd46369bc41461b4ded11c5f07e381b014c4aa46ab635d6e14bec2155d

SHA512
ced446ee989d5703829ac73176e5775d530575804457fa40726bd8a53bc91725c6c25e4298e7b2baec284cd8cdbf5083ab31607aca7e7086f91c2a2b8b4f6178

Download Submit
C:\Users\Admin\AppData\Local\Temp\Hezron

MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

Download Submit
C:\Users\Admin\AppData\Local\Temp\ayaihofcivzsykmj

Filesize
4KB

MD5
75379d3dcbcea6a69bc75b884816dd40

SHA1
7e073a03c3bdbbc60375ddbe56bba211c3d412a6

SHA256
cab559f3bbe4a0beb194dffca723b3072184b92687100462eaab04d66fff8de9

SHA512
710c2cee369a57a0039fc0d0c59de6118780210ef60ad0daf374f03ba94ab08039bc2aff821f7c99a0ecd0e16189c52e5b6d630b3d541f7b11375f134b985e8c

Download Submit
C:\Users\Admin\AppData\Local\snails\ectosphere.exe

Filesize
833KB

MD5
c517ecc1d57af03affdd6945e1b618d8

SHA1
5c5174ebdf5902ada7c5899b6c0b98f2db363372

SHA256
9a32e0821da4466b858ecfd185f3d9bff232d8a3b44983988c248df05ef7c2ef

SHA512
355c1f39946662b0c16c6a5fa4c387aad03e1dc1c1dd74d650a784fc9e718b890a877937d8d3a26ab62a22385f03e02e6d0faa6d9e07ea3b16151c909596097a

Download Submit
memory/2580-65-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-42-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-28-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-29-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-30-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-32-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-34-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-35-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-36-0x00000000008E0000-0x0000000000AAE000-memory.dmp

Filesize
1.8MB

Download
memory/2580-37-0x0000000001350000-0x0000000001750000-memory.dmp

Filesize
4.0MB

Download
memory/2580-38-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-41-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-71-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-43-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-44-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-46-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-47-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-50-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-51-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-52-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-53-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-27-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-55-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-56-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-59-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-60-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-61-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-63-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-64-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-72-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-68-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-77-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-24-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-22-0x0000000001350000-0x0000000001750000-memory.dmp

Filesize
4.0MB

Download
memory/2580-73-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-76-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-69-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-78-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-80-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-81-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-83-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-85-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-86-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-87-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-89-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-90-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-93-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-94-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-95-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-96-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-98-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-99-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-102-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-103-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-104-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-106-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-107-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2580-11-0x00000000008E0000-0x0000000000AAE000-memory.dmp

Filesize
1.8MB

Download
memory/2704-171-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2704-152-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4576-169-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4576-163-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4932-0-0x0000000000560000-0x000000000072E000-memory.dmp

Filesize
1.8MB

Download
memory/4932-7-0x0000000000CC0000-0x00000000010C0000-memory.dmp

Filesize
4.0MB

Download
memory/4932-13-0x0000000000560000-0x000000000072E000-memory.dmp

Filesize
1.8MB

Download