remcos | 9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce

Analysis

max time kernel
149s
max time network
149s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-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
behavioral1/memory/2656-46-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/2864-53-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2656-52-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/2728-51-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/2864-47-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2864-58-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2656-64-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/2656-46-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/2656-52-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/2656-64-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/2864-53-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/2864-47-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/2864-58-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1928-0-0x0000000001370000-0x000000000155B000-memory.dmp	upx
behavioral1/memory/1928-22-0x0000000001370000-0x000000000155B000-memory.dmp	upx

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	svchost.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/memory/1928-22-0x0000000001370000-0x000000000155B000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 1928 set thread context of 2460	1928	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe	31
PID 2460 set thread context of 2864	2460	svchost.exe	35
PID 2460 set thread context of 2656	2460	svchost.exe	36
PID 2460 set thread context of 2728	2460	svchost.exe	37

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

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
332	reg.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2864	svchost.exe
2864	svchost.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
1928	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe
2460	svchost.exe
2460	svchost.exe
2460	svchost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2728	svchost.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
1928	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe
1928	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe
1928	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe
1928	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe
1928	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe
1928	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe
1928	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
1928	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe
1928	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe
1928	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe
1928	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe
1928	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe
1928	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe
1928	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2460	svchost.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 1928 wrote to memory of 2460	1928	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe	31
PID 1928 wrote to memory of 2460	1928	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe	31
PID 1928 wrote to memory of 2460	1928	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe	31
PID 1928 wrote to memory of 2460	1928	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe	31
PID 1928 wrote to memory of 2460	1928	9721ea84aa82b10c5f21acc6212fb32f70750557cb6c5d9b3052ff12f74e4bce.exe	31
PID 2460 wrote to memory of 2520	2460	svchost.exe	32
PID 2460 wrote to memory of 2520	2460	svchost.exe	32
PID 2460 wrote to memory of 2520	2460	svchost.exe	32
PID 2460 wrote to memory of 2520	2460	svchost.exe	32
PID 2520 wrote to memory of 332	2520	cmd.exe	34
PID 2520 wrote to memory of 332	2520	cmd.exe	34
PID 2520 wrote to memory of 332	2520	cmd.exe	34
PID 2520 wrote to memory of 332	2520	cmd.exe	34
PID 2460 wrote to memory of 2864	2460	svchost.exe	35
PID 2460 wrote to memory of 2864	2460	svchost.exe	35
PID 2460 wrote to memory of 2864	2460	svchost.exe	35
PID 2460 wrote to memory of 2864	2460	svchost.exe	35
PID 2460 wrote to memory of 2864	2460	svchost.exe	35
PID 2460 wrote to memory of 2656	2460	svchost.exe	36
PID 2460 wrote to memory of 2656	2460	svchost.exe	36
PID 2460 wrote to memory of 2656	2460	svchost.exe	36
PID 2460 wrote to memory of 2656	2460	svchost.exe	36
PID 2460 wrote to memory of 2656	2460	svchost.exe	36
PID 2460 wrote to memory of 2728	2460	svchost.exe	37
PID 2460 wrote to memory of 2728	2460	svchost.exe	37
PID 2460 wrote to memory of 2728	2460	svchost.exe	37
PID 2460 wrote to memory of 2728	2460	svchost.exe	37
PID 2460 wrote to memory of 2728	2460	svchost.exe	37

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:1928
- 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: MapViewOfSection
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2460
- - 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:2520
  - - 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:332
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\wjzzlmdfgmjwbiwolmmkctayfmbc"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:2864
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\yemrmfoyuubbewksuxzmfyvhostldgqc"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:2656
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\jyrc"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2728

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

Replay Monitor

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Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
bea20b60cc09c382cdd0c3084e3cccf4

SHA1
decd414265b24564694cd42fcdd552cb68705e7b

SHA256
6c29638797797fd21f31e7900f57e6b6980aeac82fd21231e6b74b26e5f7b360

SHA512
6debf8c168fc0e6ef982e7b78f16d4e4aa12ef9f0cd54c35483cf522aa884d472c18ee1662c2b8b0eb95b6ea30ab51ee24bdad12a072997f3f5a25a8c533f3f8

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

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
memory/1928-12-0x00000000001A0000-0x00000000001A4000-memory.dmp

Filesize
16KB

Download
memory/1928-22-0x0000000001370000-0x000000000155B000-memory.dmp

Filesize
1.9MB

Download
memory/1928-0-0x0000000001370000-0x000000000155B000-memory.dmp

Filesize
1.9MB

Download
memory/2460-65-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2460-23-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2460-18-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2460-102-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2460-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2460-26-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2460-28-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2460-27-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2460-29-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2460-32-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2460-101-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2460-35-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2460-94-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2460-93-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2460-86-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2460-85-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2460-78-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2460-77-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2460-13-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2460-71-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2460-34-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2460-15-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2460-68-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2460-69-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2460-21-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2460-62-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2460-17-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2460-60-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2460-63-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2656-52-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2656-64-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2656-44-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2656-46-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2656-41-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2656-39-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2728-51-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2728-50-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2728-49-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2864-45-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2864-38-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2864-58-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2864-36-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2864-53-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2864-47-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download