remcos | 10f0d16023678289131ac94f84e8e4e749e894764ffc598b03f96102213725e9

Analysis

max time kernel
148s
max time network
139s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
04-09-2024 08:35

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General

Target

Public Holiday_Notice 2024.exe
Size

852KB
MD5

47dfa0eb4d05af59b16e0810c4f0f1ea
SHA1

0291227cb783e4b8f2eeed450ce9d1b6fb4568ae
SHA256

59dee7790a8cac5dec0024dbee07035b5be582c535099ef099c7dd09a82536c4
SHA512

74d5ebef2b72aaf740a6808abd3efcd8d044f8df55d9f5d7fb3f54adf3ecd8e8ad60489e05bf04cc55548e10cd7c143060f630a0d68cbf449b7cc6de04e900e1
SSDEEP

12288:FYV6MorX7qzuC3QHO9FQVHPF51jgcTL2LGF80j/s/hopXRn/1WmUgcUI31l8bqoH:6BXu9HGaVHcEg/Gx+mU3FlQFF

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 9 IoCs

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

resource	yara_rule
behavioral1/memory/2504-43-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/2504-46-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/2560-45-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/2528-44-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2560-40-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/2528-36-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2504-47-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/2528-52-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2560-54-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/2560-45-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/2560-40-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/2560-54-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/2528-44-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/2528-36-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/2528-52-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2812-0-0x00000000000A0000-0x0000000000277000-memory.dmp	upx
behavioral1/memory/2812-17-0x00000000000A0000-0x0000000000277000-memory.dmp	upx

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

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

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/memory/2812-17-0x00000000000A0000-0x0000000000277000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2812 set thread context of 2688	2812	Public Holiday_Notice 2024.exe	30
PID 2688 set thread context of 2528	2688	svchost.exe	31
PID 2688 set thread context of 2560	2688	svchost.exe	32
PID 2688 set thread context of 2504	2688	svchost.exe	33

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	Public Holiday_Notice 2024.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 2 IoCs

pid	Process
2528	svchost.exe
2528	svchost.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
2812	Public Holiday_Notice 2024.exe
2688	svchost.exe
2688	svchost.exe
2688	svchost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2504	svchost.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
2812	Public Holiday_Notice 2024.exe
2812	Public Holiday_Notice 2024.exe

Suspicious use of SendNotifyMessage 2 IoCs

pid	Process
2812	Public Holiday_Notice 2024.exe
2812	Public Holiday_Notice 2024.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2812 wrote to memory of 2688	2812	Public Holiday_Notice 2024.exe	30
PID 2812 wrote to memory of 2688	2812	Public Holiday_Notice 2024.exe	30
PID 2812 wrote to memory of 2688	2812	Public Holiday_Notice 2024.exe	30
PID 2812 wrote to memory of 2688	2812	Public Holiday_Notice 2024.exe	30
PID 2812 wrote to memory of 2688	2812	Public Holiday_Notice 2024.exe	30
PID 2688 wrote to memory of 2528	2688	svchost.exe	31
PID 2688 wrote to memory of 2528	2688	svchost.exe	31
PID 2688 wrote to memory of 2528	2688	svchost.exe	31
PID 2688 wrote to memory of 2528	2688	svchost.exe	31
PID 2688 wrote to memory of 2528	2688	svchost.exe	31
PID 2688 wrote to memory of 2560	2688	svchost.exe	32
PID 2688 wrote to memory of 2560	2688	svchost.exe	32
PID 2688 wrote to memory of 2560	2688	svchost.exe	32
PID 2688 wrote to memory of 2560	2688	svchost.exe	32
PID 2688 wrote to memory of 2560	2688	svchost.exe	32
PID 2688 wrote to memory of 2504	2688	svchost.exe	33
PID 2688 wrote to memory of 2504	2688	svchost.exe	33
PID 2688 wrote to memory of 2504	2688	svchost.exe	33
PID 2688 wrote to memory of 2504	2688	svchost.exe	33
PID 2688 wrote to memory of 2504	2688	svchost.exe	33

C:\Users\Admin\AppData\Local\Temp\Public Holiday_Notice 2024.exe
"C:\Users\Admin\AppData\Local\Temp\Public Holiday_Notice 2024.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:2812
- C:\Windows\SysWOW64\svchost.exe
  "C:\Users\Admin\AppData\Local\Temp\Public Holiday_Notice 2024.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:2688
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\gtbxynwtfwtgneopayeklnszouaatfryzf"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:2528
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\iwoqzfg"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:2560
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\sqtizyrogm"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2504

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

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Downloads

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

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
memory/2504-43-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2504-47-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2504-39-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2504-42-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2504-46-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2528-52-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2528-44-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2528-28-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2528-33-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2528-26-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2528-36-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2560-54-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2560-32-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2560-35-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2560-40-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2560-45-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2688-18-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2688-60-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2688-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2688-16-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2688-19-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2688-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2688-23-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2688-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2688-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2688-13-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2688-68-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2688-64-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2688-21-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2688-55-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2688-59-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2688-58-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2688-63-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2688-61-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2688-62-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2812-17-0x00000000000A0000-0x0000000000277000-memory.dmp

Filesize
1.8MB

Download
memory/2812-12-0x0000000000390000-0x0000000000394000-memory.dmp

Filesize
16KB

Download
memory/2812-0-0x00000000000A0000-0x0000000000277000-memory.dmp

Filesize
1.8MB

Download