remcos | d24d76d03365122aa5a4a7828a2d14368066da840ae8945cf595a6b17ceca700

Analysis

max time kernel
149s
max time network
147s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
06-09-2024 19:56

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General

Target

jv4ri.exe
Size

807KB
MD5

b17e1003bb9bbe58e090c7752447c016
SHA1

a159b486e535469d4c49b227d27608f2ad48288e
SHA256

d24d76d03365122aa5a4a7828a2d14368066da840ae8945cf595a6b17ceca700
SHA512

05077e35558e1bb636596d7a8c6b66f9554ecf8e057f61c3cf7f4af91c19f898943a5dc8b1f13914b231e09671a36631e2490e0b32799250537a375dad83af3a
SSDEEP

24576:4BXu9HGaVHUVeaBzcvMgTvk+39ABn8ApTZl:4w9VHUVebvjT19ABfp

Score

10^/10

remcos remotehost collection credential_access discovery rat stealer upx

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

45.95.169.104:2404

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
true
install_flag
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-S3AD48
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
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
behavioral1/memory/2736-77-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/2736-78-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/648-76-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2000-82-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/648-88-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2736-90-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/2736-77-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/2736-78-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/2736-90-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/648-76-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/648-88-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Drops startup file 1 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
2340	name.exe

Loads dropped DLL 1 IoCs

pid	Process
2496	jv4ri.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2496-0-0x0000000000B90000-0x0000000000D51000-memory.dmp	upx
behavioral1/files/0x0006000000018731-14.dat	upx
behavioral1/memory/2496-18-0x0000000002B90000-0x0000000002D51000-memory.dmp	upx
behavioral1/memory/2340-22-0x0000000000FD0000-0x0000000001191000-memory.dmp	upx
behavioral1/memory/2496-20-0x0000000000B90000-0x0000000000D51000-memory.dmp	upx
behavioral1/memory/2340-41-0x0000000000FD0000-0x0000000001191000-memory.dmp	upx

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	svchost.exe

AutoIT Executable 3 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/memory/2340-22-0x0000000000FD0000-0x0000000001191000-memory.dmp	autoit_exe
behavioral1/memory/2496-20-0x0000000000B90000-0x0000000000D51000-memory.dmp	autoit_exe
behavioral1/memory/2340-41-0x0000000000FD0000-0x0000000001191000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2340 set thread context of 860	2340	name.exe	32
PID 860 set thread context of 648	860	svchost.exe	34
PID 860 set thread context of 2736	860	svchost.exe	35
PID 860 set thread context of 2000	860	svchost.exe	36

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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	jv4ri.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	name.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
648	svchost.exe
648	svchost.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
2340	name.exe
860	svchost.exe
860	svchost.exe
860	svchost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2000	svchost.exe

Suspicious use of FindShellTrayWindow 4 IoCs

pid	Process
2496	jv4ri.exe
2496	jv4ri.exe
2340	name.exe
2340	name.exe

Suspicious use of SendNotifyMessage 4 IoCs

pid	Process
2496	jv4ri.exe
2496	jv4ri.exe
2340	name.exe
2340	name.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
860	svchost.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2496 wrote to memory of 2340	2496	jv4ri.exe	31
PID 2496 wrote to memory of 2340	2496	jv4ri.exe	31
PID 2496 wrote to memory of 2340	2496	jv4ri.exe	31
PID 2496 wrote to memory of 2340	2496	jv4ri.exe	31
PID 2340 wrote to memory of 860	2340	name.exe	32
PID 2340 wrote to memory of 860	2340	name.exe	32
PID 2340 wrote to memory of 860	2340	name.exe	32
PID 2340 wrote to memory of 860	2340	name.exe	32
PID 2340 wrote to memory of 860	2340	name.exe	32
PID 860 wrote to memory of 648	860	svchost.exe	34
PID 860 wrote to memory of 648	860	svchost.exe	34
PID 860 wrote to memory of 648	860	svchost.exe	34
PID 860 wrote to memory of 648	860	svchost.exe	34
PID 860 wrote to memory of 648	860	svchost.exe	34
PID 860 wrote to memory of 2736	860	svchost.exe	35
PID 860 wrote to memory of 2736	860	svchost.exe	35
PID 860 wrote to memory of 2736	860	svchost.exe	35
PID 860 wrote to memory of 2736	860	svchost.exe	35
PID 860 wrote to memory of 2736	860	svchost.exe	35
PID 860 wrote to memory of 2000	860	svchost.exe	36
PID 860 wrote to memory of 2000	860	svchost.exe	36
PID 860 wrote to memory of 2000	860	svchost.exe	36
PID 860 wrote to memory of 2000	860	svchost.exe	36
PID 860 wrote to memory of 2000	860	svchost.exe	36

C:\Users\Admin\AppData\Local\Temp\jv4ri.exe
"C:\Users\Admin\AppData\Local\Temp\jv4ri.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:2496
- C:\Users\Admin\AppData\Local\directory\name.exe
  "C:\Users\Admin\AppData\Local\Temp\jv4ri.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:2340
- - C:\Windows\SysWOW64\svchost.exe
    "C:\Users\Admin\AppData\Local\Temp\jv4ri.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:860
  - - C:\Windows\SysWOW64\svchost.exe
      C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\lrqrvmibbxbqaamfz"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:648
  - - C:\Windows\SysWOW64\svchost.exe
      C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\wlekvftuxftvdoijirsln"
      4⤵
      Accesses Microsoft Outlook accounts
      System Location Discovery: System Language Discovery
      PID:2736
  - - C:\Windows\SysWOW64\svchost.exe
      C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\ynjcoxdwlnlinvwnzcfnqmsm"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      PID:2000

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:\ProgramData\remcos\logs.dat

Filesize
184B

MD5
3f616f7d277d6f89bf61cb6fc93ffd30

SHA1
d9ce11d5f812aa67166b647b986db054fe0d7aa2

SHA256
45f34eebc0885c42a190131b2dab087bcb66d3f8e867c68fc29a024f7c78b39d

SHA512
d599032143e96f3a4368902b8bdfd71060152d4f71a27e7f75c19854b55ead6dc0f2f84298f182cf920d96f808ea1f299a31536c39624097456521be7589fbaa

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

Filesize
252KB

MD5
853be9124b51e48f5d850a835321ce11

SHA1
27873a837151fb53b7656c34a565745b84e38342

SHA256
bb2a93bd61d6f95e4c9f0d4129d38633270df2128c57b97f5406655861030d0b

SHA512
192d1b16b630ba3237f19f5bad187304b035c2c5c07af9db05c7f4df763121d8b682a732d8728068dd92bd3d6bef2ed98c8c3efffd0cfc87126894108e1b23fd

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

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
\Users\Admin\AppData\Local\directory\name.exe

Filesize
807KB

MD5
b17e1003bb9bbe58e090c7752447c016

SHA1
a159b486e535469d4c49b227d27608f2ad48288e

SHA256
d24d76d03365122aa5a4a7828a2d14368066da840ae8945cf595a6b17ceca700

SHA512
05077e35558e1bb636596d7a8c6b66f9554ecf8e057f61c3cf7f4af91c19f898943a5dc8b1f13914b231e09671a36631e2490e0b32799250537a375dad83af3a

Download Submit
memory/648-65-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/648-88-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/648-76-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/648-67-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/648-73-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/648-72-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/860-63-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/860-97-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/860-47-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/860-46-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/860-48-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/860-50-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/860-51-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/860-49-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/860-52-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/860-55-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/860-56-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/860-59-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/860-61-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/860-114-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/860-64-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/860-95-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/860-42-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/860-113-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/860-40-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/860-104-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/860-37-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/860-103-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/860-91-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/860-94-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/860-43-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2000-81-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2000-82-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2000-80-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2340-22-0x0000000000FD0000-0x0000000001191000-memory.dmp

Filesize
1.8MB

Download
memory/2340-41-0x0000000000FD0000-0x0000000001191000-memory.dmp

Filesize
1.8MB

Download
memory/2496-18-0x0000000002B90000-0x0000000002D51000-memory.dmp

Filesize
1.8MB

Download
memory/2496-12-0x0000000000630000-0x0000000000634000-memory.dmp

Filesize
16KB

Download
memory/2496-20-0x0000000000B90000-0x0000000000D51000-memory.dmp

Filesize
1.8MB

Download
memory/2496-0-0x0000000000B90000-0x0000000000D51000-memory.dmp

Filesize
1.8MB

Download
memory/2736-90-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2736-75-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2736-78-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2736-77-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2736-71-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download