remcos | 3a923e1c1267143a53bbf3e0242069f8c3b5084a8eea62312c56b1baa6300a71

General

Target

PO250410-002.exe
Size

1.3MB
MD5

c9d6a278ac02155c66b6cf5b1fbb1b30
SHA1

05f655a5bbba910caea1062b9e0cd54da218a25f
SHA256

cd5ef4c1b4c9e2b17ce5c39cf35eec1de1d42dc384b2fde7e2b122459579906b
SHA512

e74d6a943dc3f695b65231ff4ede46a1749abf25636e3792901c45ce70de15140542bd196460b9a9f30ddf63ec8d69765b335f4781fb76460c9ac9087e05e116
SSDEEP

24576:au6J33O0c+JY5UZ+XC0kGso6FaKR3Wyr88XQPaZWlW388F5d+USqWY:su0c++OCvkGs9Fa+Wz8XZWlO8+kY

Score

10^/10

remcos remotehost collection discovery rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

127.0.0.1:45111

196.251.92.84:45111

ikechi2.duckdns.org:45111

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-ZKI7L3
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Remcos
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Remcos family
remcos

Detected Nirsoft tools 7 IoCs

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

resource	yara_rule
behavioral1/memory/4828-35-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/1008-34-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/4928-33-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft
behavioral1/memory/4828-32-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/1008-31-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/4928-28-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft
behavioral1/memory/4828-40-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/4928-33-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView
behavioral1/memory/4928-28-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/4828-35-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/4828-32-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/4828-40-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-446031748-3036493239-2009529691-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	svchost.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 5020 set thread context of 1592	5020	PO250410-002.exe	89
PID 1592 set thread context of 4828	1592	svchost.exe	97
PID 1592 set thread context of 4928	1592	svchost.exe	98
PID 1592 set thread context of 1008	1592	svchost.exe	99

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4624	5020	WerFault.exe	85

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	PO250410-002.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
1008	svchost.exe
1008	svchost.exe
4828	svchost.exe
4828	svchost.exe
4828	svchost.exe
4828	svchost.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
5020	PO250410-002.exe
1592	svchost.exe
1592	svchost.exe
1592	svchost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1008	svchost.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
5020	PO250410-002.exe
5020	PO250410-002.exe

Suspicious use of SendNotifyMessage 2 IoCs

pid	Process
5020	PO250410-002.exe
5020	PO250410-002.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 5020 wrote to memory of 1592	5020	PO250410-002.exe	89
PID 5020 wrote to memory of 1592	5020	PO250410-002.exe	89
PID 5020 wrote to memory of 1592	5020	PO250410-002.exe	89
PID 5020 wrote to memory of 1592	5020	PO250410-002.exe	89
PID 1592 wrote to memory of 4828	1592	svchost.exe	97
PID 1592 wrote to memory of 4828	1592	svchost.exe	97
PID 1592 wrote to memory of 4828	1592	svchost.exe	97
PID 1592 wrote to memory of 4828	1592	svchost.exe	97
PID 1592 wrote to memory of 4928	1592	svchost.exe	98
PID 1592 wrote to memory of 4928	1592	svchost.exe	98
PID 1592 wrote to memory of 4928	1592	svchost.exe	98
PID 1592 wrote to memory of 4928	1592	svchost.exe	98
PID 1592 wrote to memory of 1008	1592	svchost.exe	99
PID 1592 wrote to memory of 1008	1592	svchost.exe	99
PID 1592 wrote to memory of 1008	1592	svchost.exe	99
PID 1592 wrote to memory of 1008	1592	svchost.exe	99

C:\Users\Admin\AppData\Local\Temp\PO250410-002.exe
"C:\Users\Admin\AppData\Local\Temp\PO250410-002.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:5020
- C:\Windows\SysWOW64\svchost.exe
  "C:\Users\Admin\AppData\Local\Temp\PO250410-002.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:1592
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\ppzdfuognhiihjpkwdlugodkyh"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:4828
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\arnvgnyabqanrpdofoywqtybzvotm"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:4928
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\klsohfrbpyssudzaozsptgskicycfcoa"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1008
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5020 -s 692
  2⤵
  - Program crash
  PID:4624

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 5020 -ip 5020
1⤵
PID:4488

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
4KB

MD5
05a640e15ef8a6cd5d8db4633bfd2df3

SHA1
23771918cb286dd2ca98c0cc1664931e64cc33c8

SHA256
5b8be3e1fe8438ab1032b5914b5f5b8f544defc91213c6ef3f307b44d2a1951c

SHA512
27d198ecea0bbc12a48ce27c8dbd8a9a445248956623cefd501562cf00162a662e40f020a7276f1f870f324617f419342de9384b71664eea4778866b8bcfd616

Download Submit
memory/1008-34-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1008-27-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1008-30-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1008-31-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1592-42-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1592-49-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1592-13-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1592-15-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1592-16-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1592-17-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1592-18-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1592-20-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1592-11-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1592-45-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1592-50-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1592-44-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1592-12-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1592-46-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1592-43-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1592-10-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1592-9-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1592-48-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1592-8-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1592-47-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1592-7-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4828-40-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4828-25-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4828-32-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4828-35-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4828-21-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4928-22-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/4928-28-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/4928-33-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/4928-26-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/5020-6-0x0000000001670000-0x0000000001A70000-memory.dmp

Filesize
4.0MB

Download

Analysis

Sharing