remcos | 75355958d81ed41f64b374f761d6b8076d558e1610214eeef8f4fd1ece8f78fa

Analysis

max time kernel
148s
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
09-09-2024 08:37

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General

Target

cf932f84c26f6d3665b03afbe44e50bf77342af73b4a1f101d48a5750fb3bf23.vbs
Size

691KB
MD5

2017ec3e440a42016679cfca89021367
SHA1

b28018bd754b0fa5170c9071fb4a615741b4dd19
SHA256

cf932f84c26f6d3665b03afbe44e50bf77342af73b4a1f101d48a5750fb3bf23
SHA512

3e29904829f4ea7ae5fcde95ccc3b4e9b440f60a1de183fe6ba7cd822d04e0976ff6e6a1bdb92a5da935e36a4485cbc982eb0d7d02c337c476c45724450efb02
SSDEEP

12288:xLtzjh8P+o6/vW/kiZI5sjLXjJkMz4Ss47DcShFXNGh/WmDj+VGP:dt3h9/uJZSsjLlkMdcSzdIuGP

Score

10^/10

remcos remotehost collection credential_access discovery rat stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

camzeroconnect.duckdns.org:14645

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-GT4655
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
behavioral2/memory/4984-42-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4984-44-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4228-41-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4336-40-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/4984-36-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4336-43-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/4336-55-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/4984-42-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/4984-44-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/4984-36-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/4336-40-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/4336-43-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/4336-55-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
3056	x.exe

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	aspnet_compiler.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 3056 set thread context of 3636	3056	x.exe	94
PID 3636 set thread context of 4336	3636	aspnet_compiler.exe	100
PID 3636 set thread context of 4984	3636	aspnet_compiler.exe	101
PID 3636 set thread context of 4228	3636	aspnet_compiler.exe	103

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4336	aspnet_compiler.exe
4336	aspnet_compiler.exe
4228	aspnet_compiler.exe
4228	aspnet_compiler.exe
4336	aspnet_compiler.exe
4336	aspnet_compiler.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
3636	aspnet_compiler.exe
3636	aspnet_compiler.exe
3636	aspnet_compiler.exe
3636	aspnet_compiler.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4228	aspnet_compiler.exe

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 5084 wrote to memory of 3056	5084	WScript.exe	92
PID 5084 wrote to memory of 3056	5084	WScript.exe	92
PID 3056 wrote to memory of 3636	3056	x.exe	94
PID 3056 wrote to memory of 3636	3056	x.exe	94
PID 3056 wrote to memory of 3636	3056	x.exe	94
PID 3056 wrote to memory of 3636	3056	x.exe	94
PID 3056 wrote to memory of 3636	3056	x.exe	94
PID 3056 wrote to memory of 3636	3056	x.exe	94
PID 3056 wrote to memory of 3636	3056	x.exe	94
PID 3056 wrote to memory of 3636	3056	x.exe	94
PID 3056 wrote to memory of 3636	3056	x.exe	94
PID 3056 wrote to memory of 3636	3056	x.exe	94
PID 3056 wrote to memory of 3636	3056	x.exe	94
PID 3056 wrote to memory of 3636	3056	x.exe	94
PID 3636 wrote to memory of 4336	3636	aspnet_compiler.exe	100
PID 3636 wrote to memory of 4336	3636	aspnet_compiler.exe	100
PID 3636 wrote to memory of 4336	3636	aspnet_compiler.exe	100
PID 3636 wrote to memory of 4336	3636	aspnet_compiler.exe	100
PID 3636 wrote to memory of 4984	3636	aspnet_compiler.exe	101
PID 3636 wrote to memory of 4984	3636	aspnet_compiler.exe	101
PID 3636 wrote to memory of 4984	3636	aspnet_compiler.exe	101
PID 3636 wrote to memory of 4984	3636	aspnet_compiler.exe	101
PID 3636 wrote to memory of 5104	3636	aspnet_compiler.exe	102
PID 3636 wrote to memory of 5104	3636	aspnet_compiler.exe	102
PID 3636 wrote to memory of 5104	3636	aspnet_compiler.exe	102
PID 3636 wrote to memory of 4228	3636	aspnet_compiler.exe	103
PID 3636 wrote to memory of 4228	3636	aspnet_compiler.exe	103
PID 3636 wrote to memory of 4228	3636	aspnet_compiler.exe	103
PID 3636 wrote to memory of 4228	3636	aspnet_compiler.exe	103

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\cf932f84c26f6d3665b03afbe44e50bf77342af73b4a1f101d48a5750fb3bf23.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5084
- C:\Users\Admin\AppData\Local\Temp\x.exe
  "C:\Users\Admin\AppData\Local\Temp\x.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:3056
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:3636
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
      C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe /stext "C:\Users\Admin\AppData\Local\Temp\ypjanqbiddytdl"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:4336
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
      C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe /stext "C:\Users\Admin\AppData\Local\Temp\irosojmkrlqyfrmjr"
      4⤵
      Accesses Microsoft Outlook accounts
      System Location Discovery: System Language Discovery
      PID:4984
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
      C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe /stext "C:\Users\Admin\AppData\Local\Temp\kludptwdftidpfinigmk"
      4⤵
      PID:5104
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
      C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe /stext "C:\Users\Admin\AppData\Local\Temp\kludptwdftidpfinigmk"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4228

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=3932,i,4356837537417149674,16553092232944545509,262144 --variations-seed-version --mojo-platform-channel-handle=4100 /prefetch:8
1⤵
PID:4568

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Discovery

Query Registry

T1012

System Information Discovery

T1082

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:\Users\Admin\AppData\Local\Temp\x.exe

Filesize
474KB

MD5
aeb8bba5e93fa1090d72a4e603c6fd72

SHA1
19bac3f94a320ab7ed10d2ab8dc5a7609d55800f

SHA256
d1019a57fa406376bf03b65c28aa50cc58377c44a6883bbeb9d2b59e7add2d98

SHA512
8a330c4d9efe0af40b2e98d3d571a69598b5bfd64ddb7723ff3a2db668a9550ceb1a3942bc5110e00543509d46ba88d8fb9623c2660626ffb298ead4dd802b9b

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

Filesize
4KB

MD5
cda83eba5a004554ccdc061fd3df499c

SHA1
58ff2ecb9d47be10335e104896c87c62dc328523

SHA256
e384f4d46587646c6e0f9d2ee90b7bc57b49cea936b37cf8ab81ef3c4ce468ac

SHA512
f55ce20f0cf8b603fad765b889607f967c22d377fa4ac417ba1309d0aced9231e197bb4107d1c92bb99f51c04cc68ce26148727a8b694886710100c01f3de597

Download Submit
memory/3056-23-0x00007FFAC73A0000-0x00007FFAC7E61000-memory.dmp

Filesize
10.8MB

Download
memory/3056-11-0x00007FFAC73A3000-0x00007FFAC73A5000-memory.dmp

Filesize
8KB

Download
memory/3056-12-0x0000019D71870000-0x0000019D718EC000-memory.dmp

Filesize
496KB

Download
memory/3056-13-0x0000019D73D80000-0x0000019D73DFA000-memory.dmp

Filesize
488KB

Download
memory/3056-14-0x00007FFAC73A0000-0x00007FFAC7E61000-memory.dmp

Filesize
10.8MB

Download
memory/3056-15-0x0000019D71CA0000-0x0000019D71CAC000-memory.dmp

Filesize
48KB

Download
memory/3056-16-0x0000019D71CB0000-0x0000019D71CB8000-memory.dmp

Filesize
32KB

Download
memory/3636-62-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3636-65-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3636-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3636-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3636-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3636-26-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3636-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3636-28-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3636-27-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3636-30-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3636-21-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3636-73-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3636-72-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3636-71-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3636-70-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3636-63-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3636-69-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3636-17-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3636-60-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3636-68-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3636-67-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3636-66-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3636-64-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3636-19-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3636-57-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3636-61-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4228-38-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4228-39-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4228-41-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4336-31-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4336-55-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4336-43-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4336-40-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4336-37-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4984-35-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4984-36-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4984-44-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4984-42-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4984-32-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download