remcos | fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940

General

Target

fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe
Size

483KB
MD5

ec6ab34d1735320d12edba8b85825e52
SHA1

722efe9572a7abc8f2d4b95fd63ebaf9572b214f
SHA256

fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940
SHA512

25c365a755b680e9920c99fcd74fb90bc324205ed9ef2bca03cf6c4166ffd50fc0511db0498e238e25ebc259a1f1d6c8b1068ab56d9d4e08f8ca09f8a39fd003
SSDEEP

6144:wTz+c6KHYBhDc1RGJdv//NkUn+N5Bkf/0TELRvIZPjbsAOZZBAXccrreT4:wTlrYw1RUh3NFn+N5WfIQIjbs/ZB5T4

Score

10^/10

remcos remotehost collection credential_access discovery rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

ugnrv.duckdns.org:9674

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-AV5HSI
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
behavioral2/memory/3740-14-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/4208-13-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/2156-12-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4208-8-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/3740-7-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/2156-24-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/2156-17-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4208-16-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/3740-26-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/4208-13-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/4208-8-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/4208-16-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/3740-14-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/3740-7-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/3740-26-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Reads user/profile data of web browsers 2 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

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1194130065-3471212556-1656947724-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 3628 set thread context of 3740	3628	fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe	88
PID 3628 set thread context of 4208	3628	fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe	89
PID 3628 set thread context of 2156	3628	fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe	90

System Location Discovery: System Language Discovery 1 TTPs 4 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	fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3740	fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe
3740	fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe
2156	fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe
2156	fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe
3740	fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe
3740	fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
3628	fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe
3628	fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe
3628	fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2156	fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3628 wrote to memory of 3740	3628	fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe	88
PID 3628 wrote to memory of 3740	3628	fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe	88
PID 3628 wrote to memory of 3740	3628	fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe	88
PID 3628 wrote to memory of 4208	3628	fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe	89
PID 3628 wrote to memory of 4208	3628	fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe	89
PID 3628 wrote to memory of 4208	3628	fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe	89
PID 3628 wrote to memory of 2156	3628	fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe	90
PID 3628 wrote to memory of 2156	3628	fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe	90
PID 3628 wrote to memory of 2156	3628	fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe	90

C:\Users\Admin\AppData\Local\Temp\fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe
"C:\Users\Admin\AppData\Local\Temp\fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3628
- C:\Users\Admin\AppData\Local\Temp\fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe
  C:\Users\Admin\AppData\Local\Temp\fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe /stext "C:\Users\Admin\AppData\Local\Temp\hgsayykwvavedwlfpiexnpmuexx"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:3740
- C:\Users\Admin\AppData\Local\Temp\fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe
  C:\Users\Admin\AppData\Local\Temp\fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe /stext "C:\Users\Admin\AppData\Local\Temp\saytzrvyrinrfdhrhtqqycydneoyjv"
  2⤵
  - Accesses Microsoft Outlook accounts
  - System Location Discovery: System Language Discovery
  PID:4208
- C:\Users\Admin\AppData\Local\Temp\fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe
  C:\Users\Admin\AppData\Local\Temp\fc23fccddb3ba337790386c047f3e09dcadf9cedae38cb11e14e6aae12ab1940.exe /stext "C:\Users\Admin\AppData\Local\Temp\ccddzjgsfqfwqjvvqedsjhtuosyzcggyp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2156

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

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
4KB

MD5
ea01dd92b15d2f570f6b167dad2d1fd0

SHA1
7b89141d4c3eb2f29d096f28a9bfe66eb006224a

SHA256
0515f49138d74283f9ac1042fd1a384f715b74c2b99193454dbb0cd585097727

SHA512
0e7695aea30250a41829fa4abb681b8c3ed4c0955e18f1f9f3a5456bfb3a76f016f538e557bf29b99ab6ab48c846f9fa3c4bccd8cb5fe73099a81b5946029ec8

Download Submit
memory/2156-22-0x0000000000430000-0x00000000004F9000-memory.dmp

Filesize
804KB

Download
memory/2156-17-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2156-24-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2156-12-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2156-11-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2156-9-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3628-29-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3628-33-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3628-36-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3628-32-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3628-34-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3628-37-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3628-35-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3740-26-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3740-14-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3740-5-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3740-7-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3740-1-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4208-16-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4208-3-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4208-13-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4208-8-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4208-6-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download

Analysis

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