remcos | 9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce

Analysis

max time kernel
147s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
10-09-2024 02:05

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General

Target

9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe
Size

892KB
MD5

f93cdcbf717238f80c02948148d9ca0f
SHA1

55b3222dce7a556d361e331e4464c428ebd0d371
SHA256

9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce
SHA512

c89e8e8c01e3c760c33e246be553fd2f85cd81654decd054a1a0698bcb818656ef8dca9a943e8ea5283d69dd040ba3022406e38209cefb1d45ff3d74c98ca519
SSDEEP

24576:WiUmSB/o5d1ubcveAPk7XOA749I/pO8fOUOSuv:W/mU/ohubcve40OOu0oUnu

Score

10^/10

remcos remotehost collection credential_access discovery evasion rat stealer trojan upx

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

system6233.duckdns.org:3045

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
true
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-HSZZPP
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

UAC bypass 3 TTPs 1 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	reg.exe

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
behavioral2/memory/3928-43-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/2516-52-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/3928-51-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4488-48-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/2516-46-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4488-42-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/4488-60-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/3928-43-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/3928-51-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/4488-48-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/4488-42-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/4488-60-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2208-0-0x0000000000E90000-0x000000000107B000-memory.dmp	upx
behavioral2/memory/2208-16-0x0000000000E90000-0x000000000107B000-memory.dmp	upx

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	svchost.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/memory/2208-16-0x0000000000E90000-0x000000000107B000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2208 set thread context of 4032	2208	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe	93
PID 4032 set thread context of 4488	4032	svchost.exe	102
PID 4032 set thread context of 3928	4032	svchost.exe	103
PID 4032 set thread context of 2516	4032	svchost.exe	104

System Location Discovery: System Language Discovery 1 TTPs 7 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	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
1552	reg.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
4032	svchost.exe
4032	svchost.exe
4032	svchost.exe
4032	svchost.exe
4032	svchost.exe
4032	svchost.exe
4488	svchost.exe
4488	svchost.exe
2516	svchost.exe
2516	svchost.exe
4488	svchost.exe
4488	svchost.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
2208	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe
4032	svchost.exe
4032	svchost.exe
4032	svchost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2516	svchost.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
2208	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe
2208	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe
2208	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe
2208	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe
2208	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe
2208	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe
2208	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
2208	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe
2208	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe
2208	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe
2208	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe
2208	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe
2208	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe
2208	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4032	svchost.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 2208 wrote to memory of 4032	2208	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe	93
PID 2208 wrote to memory of 4032	2208	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe	93
PID 2208 wrote to memory of 4032	2208	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe	93
PID 2208 wrote to memory of 4032	2208	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe	93
PID 4032 wrote to memory of 2440	4032	svchost.exe	95
PID 4032 wrote to memory of 2440	4032	svchost.exe	95
PID 4032 wrote to memory of 2440	4032	svchost.exe	95
PID 2440 wrote to memory of 1552	2440	cmd.exe	97
PID 2440 wrote to memory of 1552	2440	cmd.exe	97
PID 2440 wrote to memory of 1552	2440	cmd.exe	97
PID 4032 wrote to memory of 4488	4032	svchost.exe	102
PID 4032 wrote to memory of 4488	4032	svchost.exe	102
PID 4032 wrote to memory of 4488	4032	svchost.exe	102
PID 4032 wrote to memory of 4488	4032	svchost.exe	102
PID 4032 wrote to memory of 3928	4032	svchost.exe	103
PID 4032 wrote to memory of 3928	4032	svchost.exe	103
PID 4032 wrote to memory of 3928	4032	svchost.exe	103
PID 4032 wrote to memory of 3928	4032	svchost.exe	103
PID 4032 wrote to memory of 2516	4032	svchost.exe	104
PID 4032 wrote to memory of 2516	4032	svchost.exe	104
PID 4032 wrote to memory of 2516	4032	svchost.exe	104
PID 4032 wrote to memory of 2516	4032	svchost.exe	104

C:\Users\Admin\AppData\Local\Temp\9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe
"C:\Users\Admin\AppData\Local\Temp\9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.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:2208
- C:\Windows\SysWOW64\svchost.exe
  "C:\Users\Admin\AppData\Local\Temp\9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4032
- - C:\Windows\SysWOW64\cmd.exe
    /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2440
  - - C:\Windows\SysWOW64\reg.exe
      C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
      4⤵
      UAC bypass
      System Location Discovery: System Language Discovery
      Modifies registry key
      PID:1552
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\hzwssfzrkzwpcgnz"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:4488
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\rtbktykkyhoummbdmyq"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:3928
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\tnhvuqummpghpsxhvjdxil"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2516

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=3840,i,8231329449558834090,4540802069600791165,262144 --variations-seed-version --mojo-platform-channel-handle=4464 /prefetch:8
1⤵
PID:2676

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

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:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
9c83f8d25993b144644fec4b0da0d4ad

SHA1
19ce676686c393c7f3fcf9bafd2d0e19b46666f0

SHA256
41c5b2203b61a7bf08b85fc94048258d5e487d8d0ce41162fd4af933e63f53d2

SHA512
e92d3bdd07bbb96369cf6b144582fda88221fa79469d4582439d6ceca3beb781c75f264624f463e9c91c7c59e795874116341f7a60854685330214aba32df70b

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

Filesize
4KB

MD5
cda83eba5a004554ccdc061fd3df499c

SHA1
58ff2ecb9d47be10335e104896c87c62dc328523

SHA256
e384f4d46587646c6e0f9d2ee90b7bc57b49cea936b37cf8ab81ef3c4ce468ac

SHA512
f55ce20f0cf8b603fad765b889607f967c22d377fa4ac417ba1309d0aced9231e197bb4107d1c92bb99f51c04cc68ce26148727a8b694886710100c01f3de597

Download Submit
memory/2208-12-0x00000000023C0000-0x00000000023C4000-memory.dmp

Filesize
16KB

Download
memory/2208-0-0x0000000000E90000-0x000000000107B000-memory.dmp

Filesize
1.9MB

Download
memory/2208-16-0x0000000000E90000-0x000000000107B000-memory.dmp

Filesize
1.9MB

Download
memory/2516-46-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2516-39-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2516-45-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2516-52-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3928-37-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3928-41-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3928-51-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3928-43-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4032-67-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4032-13-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4032-31-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4032-32-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4032-102-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4032-27-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4032-26-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4032-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4032-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4032-101-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4032-23-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4032-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4032-94-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4032-19-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4032-18-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4032-93-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4032-86-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4032-17-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4032-62-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4032-66-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4032-15-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4032-65-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4032-68-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4032-69-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4032-70-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4032-29-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4032-77-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4032-78-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4032-85-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4488-60-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4488-38-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4488-42-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4488-48-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4488-35-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download