remcos | 7da39b0f40a5e5d05d9a13dae2628f91a385302384565c976849c6c56d54b1c4

General

Target

Public Holiday_Notice 2024.exe
Size

1.4MB
MD5

6a059d39861fe040d2ec45e74daacf34
SHA1

3023e95579019dffc86596db8e5fc27b2f574b65
SHA256

92be4e60ffc8bcce4d34243d1c5ec0f70c8059504d6466248ceeb8d0dde01afa
SHA512

654b1554789984c3fe0453a0afa7a8f078d78def8d9786b34d9f340452e37b6d880ac70fce3953a8744dce79a16bd6a0a4052b43aefc4727a46037e1885d6bf7
SSDEEP

24576:sqDEvCTbMWu7rQYlBQcBiT6rprG8a74RgPQ9QjPAZZJXjIc:sTvC/MTQYxsWR7a74RgPQ9QjeZJ

Score

10^/10

remcos remotehost collection credential_access discovery rat stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

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 7 IoCs

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

resource	yara_rule
behavioral1/memory/2868-39-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/2812-38-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2184-37-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/2868-33-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/2812-32-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2812-44-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2868-46-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/2868-39-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/2868-33-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/2868-46-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/2812-38-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/2812-32-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/2812-44-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	svchost.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2464 set thread context of 2172	2464	Public Holiday_Notice 2024.exe	30
PID 2172 set thread context of 2812	2172	svchost.exe	31
PID 2172 set thread context of 2868	2172	svchost.exe	32
PID 2172 set thread context of 2184	2172	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	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	Public Holiday_Notice 2024.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2812	svchost.exe
2812	svchost.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
2464	Public Holiday_Notice 2024.exe
2172	svchost.exe
2172	svchost.exe
2172	svchost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2184	svchost.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
2464	Public Holiday_Notice 2024.exe
2464	Public Holiday_Notice 2024.exe

Suspicious use of SendNotifyMessage 2 IoCs

pid	Process
2464	Public Holiday_Notice 2024.exe
2464	Public Holiday_Notice 2024.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2464 wrote to memory of 2172	2464	Public Holiday_Notice 2024.exe	30
PID 2464 wrote to memory of 2172	2464	Public Holiday_Notice 2024.exe	30
PID 2464 wrote to memory of 2172	2464	Public Holiday_Notice 2024.exe	30
PID 2464 wrote to memory of 2172	2464	Public Holiday_Notice 2024.exe	30
PID 2464 wrote to memory of 2172	2464	Public Holiday_Notice 2024.exe	30
PID 2172 wrote to memory of 2812	2172	svchost.exe	31
PID 2172 wrote to memory of 2812	2172	svchost.exe	31
PID 2172 wrote to memory of 2812	2172	svchost.exe	31
PID 2172 wrote to memory of 2812	2172	svchost.exe	31
PID 2172 wrote to memory of 2812	2172	svchost.exe	31
PID 2172 wrote to memory of 2868	2172	svchost.exe	32
PID 2172 wrote to memory of 2868	2172	svchost.exe	32
PID 2172 wrote to memory of 2868	2172	svchost.exe	32
PID 2172 wrote to memory of 2868	2172	svchost.exe	32
PID 2172 wrote to memory of 2868	2172	svchost.exe	32
PID 2172 wrote to memory of 2184	2172	svchost.exe	33
PID 2172 wrote to memory of 2184	2172	svchost.exe	33
PID 2172 wrote to memory of 2184	2172	svchost.exe	33
PID 2172 wrote to memory of 2184	2172	svchost.exe	33
PID 2172 wrote to memory of 2184	2172	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:2464
- 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:2172
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\cfkiazpibujnwqwav"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:2812
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\mapaasacpcbsgesmmhpnt"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:2868
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\ouctbkkdcktxjkhqvrkpwblu"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2184

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
memory/2172-19-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2172-55-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2172-14-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2172-15-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2172-47-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2172-17-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2172-18-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2172-51-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2172-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2172-58-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2172-56-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2172-11-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2172-54-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2172-53-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2172-52-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2172-50-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2172-16-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2172-13-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2172-21-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2184-37-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2184-35-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2184-36-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2464-10-0x00000000001E0000-0x00000000001E4000-memory.dmp

Filesize
16KB

Download
memory/2812-44-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2812-29-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2812-32-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2812-38-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2812-24-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2812-22-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2868-46-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2868-31-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2868-39-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2868-30-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2868-33-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download

Analysis

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