remcos | c2cf1032ae671d0bcba6d625bc72236b125f864a1bb6114c6b96a8e0c91c6759

Analysis

max time kernel
148s
max time network
129s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
07/08/2024, 11:05

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General

Target

MalwareBazaar.exe
Size

863KB
MD5

fa7f5341c4ee122c6295e08d04062ac0
SHA1

f479d2673e995cdf233b2fb13aa595cd542ab742
SHA256

c2cf1032ae671d0bcba6d625bc72236b125f864a1bb6114c6b96a8e0c91c6759
SHA512

e3e81f334038fe06fe06c9bea9b7e2549134bb6f7ba6dd06dbaa68fefd26c533a6d0a18b81fdb619a518b2fbce6134484af67851a57ac26d04942ea1469d0de2
SSDEEP

24576:eiUmSB/o5d1ubcvBxuwQYTReNoH+V2uiQd+Dgyx:e/mU/ohubcvBk8Neh0ug8

Score

10^/10

remcos remotehost collection credential_access discovery rat stealer upx

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

194.169.175.190:2404

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-LBZ2BK
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
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

Detected Nirsoft tools 6 IoCs

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

resource	yara_rule
behavioral2/memory/4040-36-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/3784-41-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/4040-39-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4736-38-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4736-37-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/3784-46-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/4736-38-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/4736-37-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/3784-41-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/3784-46-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4744-0-0x0000000000F70000-0x000000000114B000-memory.dmp	upx
behavioral2/memory/4744-17-0x0000000000F70000-0x000000000114B000-memory.dmp	upx

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	svchost.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/memory/4744-17-0x0000000000F70000-0x000000000114B000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 4744 set thread context of 3624	4744	MalwareBazaar.exe	86
PID 3624 set thread context of 3784	3624	svchost.exe	87
PID 3624 set thread context of 4736	3624	svchost.exe	89
PID 3624 set thread context of 4040	3624	svchost.exe	90

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	MalwareBazaar.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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4040	svchost.exe
4040	svchost.exe
3784	svchost.exe
3784	svchost.exe
3784	svchost.exe
3784	svchost.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
4744	MalwareBazaar.exe
3624	svchost.exe
3624	svchost.exe
3624	svchost.exe
3624	svchost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4040	svchost.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
4744	MalwareBazaar.exe
4744	MalwareBazaar.exe

Suspicious use of SendNotifyMessage 2 IoCs

pid	Process
4744	MalwareBazaar.exe
4744	MalwareBazaar.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 4744 wrote to memory of 3624	4744	MalwareBazaar.exe	86
PID 4744 wrote to memory of 3624	4744	MalwareBazaar.exe	86
PID 4744 wrote to memory of 3624	4744	MalwareBazaar.exe	86
PID 4744 wrote to memory of 3624	4744	MalwareBazaar.exe	86
PID 3624 wrote to memory of 3784	3624	svchost.exe	87
PID 3624 wrote to memory of 3784	3624	svchost.exe	87
PID 3624 wrote to memory of 3784	3624	svchost.exe	87
PID 3624 wrote to memory of 3784	3624	svchost.exe	87
PID 3624 wrote to memory of 4380	3624	svchost.exe	88
PID 3624 wrote to memory of 4380	3624	svchost.exe	88
PID 3624 wrote to memory of 4380	3624	svchost.exe	88
PID 3624 wrote to memory of 4736	3624	svchost.exe	89
PID 3624 wrote to memory of 4736	3624	svchost.exe	89
PID 3624 wrote to memory of 4736	3624	svchost.exe	89
PID 3624 wrote to memory of 4736	3624	svchost.exe	89
PID 3624 wrote to memory of 4040	3624	svchost.exe	90
PID 3624 wrote to memory of 4040	3624	svchost.exe	90
PID 3624 wrote to memory of 4040	3624	svchost.exe	90
PID 3624 wrote to memory of 4040	3624	svchost.exe	90

C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe
"C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe"
1⤵
- 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:4744
- C:\Windows\SysWOW64\svchost.exe
  "C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:3624
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\apwzjjcyrj"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:3784
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\drbskcnafrwun"
    3⤵
    PID:4380
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\drbskcnafrwun"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:4736
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\nmhkcuyutzozprjh"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4040

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

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\apwzjjcyrj

Filesize
4KB

MD5
a7e181f6aa185be0ab0ca68b30406fe6

SHA1
58c86162658dc609615b8b6400f85c92506dfdc8

SHA256
c3071dc55b94db225d9c0f2c1b21c7e8f27dbfd168b85b7d618d8d19950e7ff2

SHA512
49969eb10e0bf7925940eb7374451f811658ef9ccfb83b86fb337c4d06c3ba17eb0181f598d9e0ec9ca25bfaf644209ac47b73d62ac924e73d03a4dcf8f8dd0f

Download Submit
memory/3624-52-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3624-53-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3624-14-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3624-62-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3624-16-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3624-19-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3624-18-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3624-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3624-21-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3624-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3624-23-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3624-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3624-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3624-26-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3624-61-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3624-60-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3624-59-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3624-58-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3624-57-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3624-56-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3624-13-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3624-55-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3624-54-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3624-51-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3624-48-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3784-46-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3784-27-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3784-32-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3784-41-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3784-40-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4040-39-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4040-35-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4040-36-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4040-31-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4736-33-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4736-38-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4736-37-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4736-29-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4744-0-0x0000000000F70000-0x000000000114B000-memory.dmp

Filesize
1.9MB

Download
memory/4744-12-0x0000000000F30000-0x0000000000F34000-memory.dmp

Filesize
16KB

Download
memory/4744-17-0x0000000000F70000-0x000000000114B000-memory.dmp

Filesize
1.9MB

Download