remcos | 93d43be8d60315e2c66ad16dbcf6a41fda162f09cb27f63547d71330220bddf7

Analysis

max time kernel
149s
max time network
132s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
25-08-2024 01:07

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General

Target

3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe
Size

3.5MB
MD5

2e5655f2cfebe6357e6388e678f3c073
SHA1

f1d6b68d73a8da906368837c1cde74a26a900858
SHA256

3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d
SHA512

13477f0bc9a73809e7b069dc441c7fb0023178811f4fe3f39ccbc4b4c412516b612439d8025b0c79c33201c791b343cdcf7dec4a3fe7eabcd3e28b1cf520747f
SSDEEP

98304:cUROmKjJqajychmAfNKcA+hv5r61JD4XEdGic/7FW:TsqzcEAfhrr0D4UdGb/hW

Score

10^/10

remcos remotehost collection credential_access discovery evasion persistence rat spyware stealer themida trojan

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

192.3.101.172:9674

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
Log
keylog_path
%Temp%
mouse_option
false
mutex
Rmc-54ZTI0
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 5 IoCs

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

resource	yara_rule
behavioral2/memory/5040-40-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/4040-45-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/852-55-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4040-49-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/852-48-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/4040-45-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/4040-49-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/5040-40-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe

Loads dropped DLL 1 IoCs

pid	Process
3608	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe

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

Themida packer 3 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral2/memory/3608-28-0x0000000000690000-0x0000000000FF2000-memory.dmp	themida
behavioral2/memory/3608-29-0x0000000000690000-0x0000000000FF2000-memory.dmp	themida
behavioral2/memory/852-54-0x0000000000690000-0x0000000000FF2000-memory.dmp	themida

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	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1194130065-3471212556-1656947724-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MyApp = "C:\\Users\\Admin\\AppData\\Local\\Temp\\3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe"	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
3608	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 3608 set thread context of 5040	3608	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe	91
PID 3608 set thread context of 4040	3608	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe	92
PID 3608 set thread context of 852	3608	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe	93

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	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
5040	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe
5040	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe
852	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe
852	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe
5040	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe
5040	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
3608	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe
3608	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe
3608	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	852	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3608	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3608 wrote to memory of 5040	3608	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe	91
PID 3608 wrote to memory of 5040	3608	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe	91
PID 3608 wrote to memory of 5040	3608	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe	91
PID 3608 wrote to memory of 5040	3608	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe	91
PID 3608 wrote to memory of 4040	3608	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe	92
PID 3608 wrote to memory of 4040	3608	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe	92
PID 3608 wrote to memory of 4040	3608	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe	92
PID 3608 wrote to memory of 4040	3608	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe	92
PID 3608 wrote to memory of 852	3608	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe	93
PID 3608 wrote to memory of 852	3608	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe	93
PID 3608 wrote to memory of 852	3608	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe	93
PID 3608 wrote to memory of 852	3608	3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe	93

C:\Users\Admin\AppData\Local\Temp\3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe
"C:\Users\Admin\AppData\Local\Temp\3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Loads dropped DLL
- Adds Run key to start application
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3608
- C:\Users\Admin\AppData\Local\Temp\3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe
  C:\Users\Admin\AppData\Local\Temp\3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe /stext "C:\Users\Admin\AppData\Local\Temp\rmlxmuyjnfplsyrvyvyyewhpeqsepuodql"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:5040
- C:\Users\Admin\AppData\Local\Temp\3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe
  C:\Users\Admin\AppData\Local\Temp\3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe /stext "C:\Users\Admin\AppData\Local\Temp\cpqinn"
  2⤵
  - Accesses Microsoft Outlook accounts
  - System Location Discovery: System Language Discovery
  PID:4040
- C:\Users\Admin\AppData\Local\Temp\3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe
  C:\Users\Admin\AppData\Local\Temp\3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe /stext "C:\Users\Admin\AppData\Local\Temp\ejwanfufpv"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:852

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Virtualization/Sandbox Evasion

T1497

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\57613b55.dll

Filesize
8KB

MD5
e1db733e43aa8d065fb7e8669db76524

SHA1
3f9c62ee28959959271632fdc7f5387d539a1d23

SHA256
9e65d9e8ebb895f3b03c95ce64f044c70251fff444a4bcbee83f558b599a614d

SHA512
3f6106f32932e72d197865f7b796eba072c8ab20c22b4d205f27de9b9fc6c139be8450ae25541fbdac37a06bc3ec2d1fab3f9b3216201a9231b70fcde6fb8eb3

Download Submit
C:\Users\Admin\AppData\Local\Temp\Log\logs.dat

Filesize
144B

MD5
c391c333693cbbe0b9dfed62e118b34b

SHA1
4cfcc9fd287224838e45e4eee1da09ab9647d8b4

SHA256
8a5ab4b1e5c860bf375a6c0c642d090dae59277c2facef9ba4eaa24b4d401f9c

SHA512
e89c54cc3cb49751d4b48f3d0d238a9d0be9e4197bc0e2d517993b7fb06d0cfdce78df03b1df83fef39a64636167215d20c23fc140164e83414f1bb9ebc537a3

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

Filesize
4KB

MD5
ea01dd92b15d2f570f6b167dad2d1fd0

SHA1
7b89141d4c3eb2f29d096f28a9bfe66eb006224a

SHA256
0515f49138d74283f9ac1042fd1a384f715b74c2b99193454dbb0cd585097727

SHA512
0e7695aea30250a41829fa4abb681b8c3ed4c0955e18f1f9f3a5456bfb3a76f016f538e557bf29b99ab6ab48c846f9fa3c4bccd8cb5fe73099a81b5946029ec8

Download Submit
memory/852-42-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/852-47-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/852-48-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/852-54-0x0000000000690000-0x0000000000FF2000-memory.dmp

Filesize
9.4MB

Download
memory/852-55-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3608-28-0x0000000000690000-0x0000000000FF2000-memory.dmp

Filesize
9.4MB

Download
memory/3608-4-0x0000000076AD0000-0x0000000076BC0000-memory.dmp

Filesize
960KB

Download
memory/3608-21-0x0000000010000000-0x000000001007F000-memory.dmp

Filesize
508KB

Download
memory/3608-22-0x0000000076AD0000-0x0000000076BC0000-memory.dmp

Filesize
960KB

Download
memory/3608-26-0x0000000010000000-0x000000001007F000-memory.dmp

Filesize
508KB

Download
memory/3608-27-0x0000000010000000-0x000000001007F000-memory.dmp

Filesize
508KB

Download
memory/3608-23-0x0000000010000000-0x000000001007F000-memory.dmp

Filesize
508KB

Download
memory/3608-0-0x0000000000690000-0x0000000000FF2000-memory.dmp

Filesize
9.4MB

Download
memory/3608-29-0x0000000000690000-0x0000000000FF2000-memory.dmp

Filesize
9.4MB

Download
memory/3608-30-0x0000000010000000-0x000000001007F000-memory.dmp

Filesize
508KB

Download
memory/3608-31-0x0000000010000000-0x000000001007F000-memory.dmp

Filesize
508KB

Download
memory/3608-32-0x0000000010000000-0x000000001007F000-memory.dmp

Filesize
508KB

Download
memory/3608-33-0x0000000010000000-0x000000001007F000-memory.dmp

Filesize
508KB

Download
memory/3608-35-0x0000000010000000-0x000000001007F000-memory.dmp

Filesize
508KB

Download
memory/3608-127-0x0000000010000000-0x000000001007F000-memory.dmp

Filesize
508KB

Download
memory/3608-126-0x0000000010000000-0x000000001007F000-memory.dmp

Filesize
508KB

Download
memory/3608-115-0x0000000010000000-0x000000001007F000-memory.dmp

Filesize
508KB

Download
memory/3608-116-0x0000000010000000-0x000000001007F000-memory.dmp

Filesize
508KB

Download
memory/3608-105-0x0000000010000000-0x000000001007F000-memory.dmp

Filesize
508KB

Download
memory/3608-104-0x0000000010000000-0x000000001007F000-memory.dmp

Filesize
508KB

Download
memory/3608-94-0x0000000010000000-0x000000001007F000-memory.dmp

Filesize
508KB

Download
memory/3608-1-0x0000000076AF0000-0x0000000076AF1000-memory.dmp

Filesize
4KB

Download
memory/3608-5-0x0000000076AD0000-0x0000000076BC0000-memory.dmp

Filesize
960KB

Download
memory/3608-93-0x0000000010000000-0x000000001007F000-memory.dmp

Filesize
508KB

Download
memory/3608-6-0x0000000076AD0000-0x0000000076BC0000-memory.dmp

Filesize
960KB

Download
memory/3608-7-0x0000000076AD0000-0x0000000076BC0000-memory.dmp

Filesize
960KB

Download
memory/3608-2-0x0000000076AD0000-0x0000000076BC0000-memory.dmp

Filesize
960KB

Download
memory/3608-83-0x0000000010000000-0x000000001007F000-memory.dmp

Filesize
508KB

Download
memory/3608-10-0x0000000010000000-0x000000001007F000-memory.dmp

Filesize
508KB

Download
memory/3608-82-0x0000000010000000-0x000000001007F000-memory.dmp

Filesize
508KB

Download
memory/3608-3-0x0000000076AD0000-0x0000000076BC0000-memory.dmp

Filesize
960KB

Download
memory/3608-60-0x0000000007540000-0x0000000007559000-memory.dmp

Filesize
100KB

Download
memory/3608-64-0x0000000007540000-0x0000000007559000-memory.dmp

Filesize
100KB

Download
memory/3608-65-0x0000000010000000-0x000000001007F000-memory.dmp

Filesize
508KB

Download
memory/3608-63-0x0000000007540000-0x0000000007559000-memory.dmp

Filesize
100KB

Download
memory/3608-66-0x0000000000690000-0x0000000000FF2000-memory.dmp

Filesize
9.4MB

Download
memory/3608-67-0x0000000076AF0000-0x0000000076AF1000-memory.dmp

Filesize
4KB

Download
memory/3608-68-0x0000000076AD0000-0x0000000076BC0000-memory.dmp

Filesize
960KB

Download
memory/3608-69-0x0000000076AD0000-0x0000000076BC0000-memory.dmp

Filesize
960KB

Download
memory/3608-71-0x0000000076AD0000-0x0000000076BC0000-memory.dmp

Filesize
960KB

Download
memory/3608-72-0x0000000076AD0000-0x0000000076BC0000-memory.dmp

Filesize
960KB

Download
memory/3608-73-0x0000000076AD0000-0x0000000076BC0000-memory.dmp

Filesize
960KB

Download
memory/3608-74-0x0000000076AD0000-0x0000000076BC0000-memory.dmp

Filesize
960KB

Download
memory/4040-38-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4040-77-0x0000000000690000-0x0000000000FF2000-memory.dmp

Filesize
9.4MB

Download
memory/4040-49-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4040-53-0x0000000000690000-0x0000000000FF2000-memory.dmp

Filesize
9.4MB

Download
memory/4040-44-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4040-45-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/5040-58-0x0000000076AD0000-0x0000000076BC0000-memory.dmp

Filesize
960KB

Download
memory/5040-39-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/5040-56-0x0000000076AD0000-0x0000000076BC0000-memory.dmp

Filesize
960KB

Download
memory/5040-41-0x0000000000690000-0x0000000000FF2000-memory.dmp

Filesize
9.4MB

Download
memory/5040-40-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/5040-36-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download