remcos | 9f6b2a0d2aef8aa1d11f543aea46b0821b378e695920b966507761c83ec09de3

Analysis

max time kernel
149s
max time network
143s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
24/07/2024, 03:00

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General

Target

MalwareBazaar.exe
Size

1.2MB
MD5

8967dfc4ac3e7430249a90e80d582319
SHA1

7ce421ecb941e60337f41da358d23d0348a4a074
SHA256

9f6b2a0d2aef8aa1d11f543aea46b0821b378e695920b966507761c83ec09de3
SHA512

5b1bafb4cb6a9dcf762a1cfb22afb96f7262ca9ab58c914e2b3292aeaf627925809c6821480d28d08defaf3fe803ff7caf1970fa3d237f5f032b6cbfbdc75133
SSDEEP

24576:/7KJ9yTXc3Np0OhffLHA7oAe8pNQcoNmlkIDJw2xvyb8:u+w3bLHAGyGfhcw2E8

Score

10^/10

remcos remotehost collection credential_access discovery evasion execution rat stealer trojan

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

107.175.229.139:8823

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-2BGC0K
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"	MalwareBazaar.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 3 IoCs

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

resource	yara_rule
behavioral1/memory/1096-54-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/296-53-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/2124-48-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/296-53-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/2124-48-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2992	powershell.exe

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2660163958-4080398480-1122754539-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	wmplayer.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

T1082

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

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2092 set thread context of 2988	2092	MalwareBazaar.exe	34
PID 2988 set thread context of 2124	2988	wmplayer.exe	37
PID 2988 set thread context of 296	2988	wmplayer.exe	38
PID 2988 set thread context of 1096	2988	wmplayer.exe	39

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

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2992	powershell.exe
2124	wmplayer.exe
2124	wmplayer.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
2988	wmplayer.exe
2988	wmplayer.exe
2988	wmplayer.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2992	powershell.exe
Token: SeDebugPrivilege	1096	wmplayer.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2988	wmplayer.exe

Suspicious use of WriteProcessMemory 34 IoCs

description	pid	Process	procid_target
PID 2092 wrote to memory of 2992	2092	MalwareBazaar.exe	32
PID 2092 wrote to memory of 2992	2092	MalwareBazaar.exe	32
PID 2092 wrote to memory of 2992	2092	MalwareBazaar.exe	32
PID 2092 wrote to memory of 2988	2092	MalwareBazaar.exe	34
PID 2092 wrote to memory of 2988	2092	MalwareBazaar.exe	34
PID 2092 wrote to memory of 2988	2092	MalwareBazaar.exe	34
PID 2092 wrote to memory of 2988	2092	MalwareBazaar.exe	34
PID 2092 wrote to memory of 2988	2092	MalwareBazaar.exe	34
PID 2092 wrote to memory of 2988	2092	MalwareBazaar.exe	34
PID 2092 wrote to memory of 2988	2092	MalwareBazaar.exe	34
PID 2092 wrote to memory of 2988	2092	MalwareBazaar.exe	34
PID 2092 wrote to memory of 2988	2092	MalwareBazaar.exe	34
PID 2092 wrote to memory of 2988	2092	MalwareBazaar.exe	34
PID 2092 wrote to memory of 2988	2092	MalwareBazaar.exe	34
PID 2092 wrote to memory of 2988	2092	MalwareBazaar.exe	34
PID 2092 wrote to memory of 2988	2092	MalwareBazaar.exe	34
PID 2092 wrote to memory of 332	2092	MalwareBazaar.exe	35
PID 2092 wrote to memory of 332	2092	MalwareBazaar.exe	35
PID 2092 wrote to memory of 332	2092	MalwareBazaar.exe	35
PID 2988 wrote to memory of 2124	2988	wmplayer.exe	37
PID 2988 wrote to memory of 2124	2988	wmplayer.exe	37
PID 2988 wrote to memory of 2124	2988	wmplayer.exe	37
PID 2988 wrote to memory of 2124	2988	wmplayer.exe	37
PID 2988 wrote to memory of 2124	2988	wmplayer.exe	37
PID 2988 wrote to memory of 296	2988	wmplayer.exe	38
PID 2988 wrote to memory of 296	2988	wmplayer.exe	38
PID 2988 wrote to memory of 296	2988	wmplayer.exe	38
PID 2988 wrote to memory of 296	2988	wmplayer.exe	38
PID 2988 wrote to memory of 296	2988	wmplayer.exe	38
PID 2988 wrote to memory of 1096	2988	wmplayer.exe	39
PID 2988 wrote to memory of 1096	2988	wmplayer.exe	39
PID 2988 wrote to memory of 1096	2988	wmplayer.exe	39
PID 2988 wrote to memory of 1096	2988	wmplayer.exe	39
PID 2988 wrote to memory of 1096	2988	wmplayer.exe	39

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

T1112

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

C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe
"C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe"
1⤵
- UAC bypass
- Checks whether UAC is enabled
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
- System policy modification
PID:2092
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe" -Force
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2992
- C:\Program Files (x86)\Windows Media Player\wmplayer.exe
  "C:\Program Files (x86)\Windows Media Player\wmplayer.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2988
- - C:\Program Files (x86)\Windows Media Player\wmplayer.exe
    "C:\Program Files (x86)\Windows Media Player\wmplayer.exe" /stext "C:\Users\Admin\AppData\Local\Temp\rqimmkopgqkdjrkkrwwdsgie"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:2124
- - C:\Program Files (x86)\Windows Media Player\wmplayer.exe
    "C:\Program Files (x86)\Windows Media Player\wmplayer.exe" /stext "C:\Users\Admin\AppData\Local\Temp\btvendyiuycilyzwbhrwdtdvtdp"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:296
- - C:\Program Files (x86)\Windows Media Player\wmplayer.exe
    "C:\Program Files (x86)\Windows Media Player\wmplayer.exe" /stext "C:\Users\Admin\AppData\Local\Temp\dnaxovjkiguvwenasrdygypecjhrvv"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:1096
- C:\Windows\system32\WerFault.exe
  C:\Windows\system32\WerFault.exe -u -p 2092 -s 844
  2⤵
  PID:332

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

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 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:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
71a92396a25b1b52e5aef6dd41789feb

SHA1
b09b28943e9385c16102f36ce2a74619c8f54829

SHA256
110c915a6042c5da93e7101a08c883f1a7ab1ba652307206ad3f972afdc7a0bb

SHA512
eadad84cdcaf31a038c491683b42ebdd5eca047a2d8137e40a6743a8218fbdb25a70769547b565bacd1d38da2e3066e28ccc8faa40b033c8b20ac5864e02c847

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

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
memory/296-49-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/296-47-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/296-53-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1096-51-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1096-54-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1096-52-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2092-0-0x000007FEF56B3000-0x000007FEF56B4000-memory.dmp

Filesize
4KB

Download
memory/2092-3-0x000000001B170000-0x000000001B242000-memory.dmp

Filesize
840KB

Download
memory/2092-1-0x0000000000A10000-0x0000000000A1E000-memory.dmp

Filesize
56KB

Download
memory/2092-71-0x000007FEF56B3000-0x000007FEF56B4000-memory.dmp

Filesize
4KB

Download
memory/2092-73-0x000007FEF56B0000-0x000007FEF609C000-memory.dmp

Filesize
9.9MB

Download
memory/2092-2-0x000000001AC00000-0x000000001AC0E000-memory.dmp

Filesize
56KB

Download
memory/2092-4-0x000007FEF56B0000-0x000007FEF609C000-memory.dmp

Filesize
9.9MB

Download
memory/2124-45-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2124-44-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2124-48-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2988-40-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2988-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2988-105-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2988-104-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2988-37-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2988-38-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2988-39-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2988-7-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2988-42-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2988-10-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2988-11-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2988-13-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2988-15-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2988-17-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2988-29-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2988-19-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2988-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2988-5-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2988-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2988-64-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2988-65-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2988-61-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2988-66-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2988-69-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2988-70-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2988-26-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2988-30-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2988-74-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2988-21-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2988-80-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2988-81-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2988-89-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2988-88-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2992-36-0x0000000001F70000-0x0000000001F78000-memory.dmp

Filesize
32KB

Download
memory/2992-35-0x000000001B4F0000-0x000000001B7D2000-memory.dmp

Filesize
2.9MB

Download