remcos | 9ec9c4c81c67d6628d141981a7020bb7ded83b4c40ff693870cd98eaebf74912

Analysis

max time kernel
426s
max time network
427s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
17/09/2024, 21:48 UTC

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Solara2.0.exe
Size

469KB
MD5

48f4a8f633bf5535811c23a81d8d8506
SHA1

c2a98525bfda82421cb8670db223b19acef31f23
SHA256

9ec9c4c81c67d6628d141981a7020bb7ded83b4c40ff693870cd98eaebf74912
SHA512

7903c322d886bcffc06a9310ba451b0f0eac53d2acedf45b544548ae3656ef477b5a03a86d54452d65461957df4c643082338119bdeb0f2303f528daf0642e29
SSDEEP

12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQSOn9:uiLJbpI7I2WhQqZ7O9

Score

10^/10

remcos remotehost discovery evasion persistence rat trojan

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

192.168.1.56:13970

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
Windows32.exe
copy_folder
Health
delete_file
true
hide_file
true
hide_keylog_file
true
install_flag
true
install_path
%WinDir%\System32
keylog_crypt
true
keylog_file
logs.dat
keylog_flag
false
keylog_folder
filer32
keylog_path
%WinDir%\System32
mouse_option
false
mutex
Rmc-36XJ31
screenshot_crypt
true
screenshot_flag
true
screenshot_folder
Screenshots
screenshot_path
%WinDir%\System32
screenshot_time
10
startup_value
WindowsHealth
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 2 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
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	reg.exe

Adds policy Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	Solara2.0.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\WindowsHealth = "\"C:\\Windows\\SysWOW64\\Health\\Windows32.exe\""	Solara2.0.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	Windows32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\WindowsHealth = "\"C:\\Windows\\SysWOW64\\Health\\Windows32.exe\""	Windows32.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	Solara2.0.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	WScript.exe

Deletes itself 1 IoCs

pid	Process
2240	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
2540	Windows32.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WindowsHealth = "\"C:\\Windows\\SysWOW64\\Health\\Windows32.exe\""	Windows32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\WindowsHealth = "\"C:\\Windows\\SysWOW64\\Health\\Windows32.exe\""	Windows32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WindowsHealth = "\"C:\\Windows\\SysWOW64\\Health\\Windows32.exe\""	Solara2.0.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\WindowsHealth = "\"C:\\Windows\\SysWOW64\\Health\\Windows32.exe\""	Solara2.0.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\Health\Windows32.exe	Solara2.0.exe
File opened for modification	C:\Windows\SysWOW64\Health\Windows32.exe	Solara2.0.exe
File opened for modification	C:\Windows\SysWOW64\Health	Solara2.0.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2540 set thread context of 1476	2540	Windows32.exe	91

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 8 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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Windows32.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	Solara2.0.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000_Classes\Local Settings	Solara2.0.exe

Modifies registry key 1 TTPs 2 IoCs

Modify Registry

T1112

pid	Process
4344	reg.exe
1864	reg.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2540	Windows32.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 1980 wrote to memory of 3448	1980	Solara2.0.exe	82
PID 1980 wrote to memory of 3448	1980	Solara2.0.exe	82
PID 1980 wrote to memory of 3448	1980	Solara2.0.exe	82
PID 3448 wrote to memory of 4344	3448	cmd.exe	84
PID 3448 wrote to memory of 4344	3448	cmd.exe	84
PID 3448 wrote to memory of 4344	3448	cmd.exe	84
PID 1980 wrote to memory of 2240	1980	Solara2.0.exe	85
PID 1980 wrote to memory of 2240	1980	Solara2.0.exe	85
PID 1980 wrote to memory of 2240	1980	Solara2.0.exe	85
PID 2240 wrote to memory of 4932	2240	WScript.exe	87
PID 2240 wrote to memory of 4932	2240	WScript.exe	87
PID 2240 wrote to memory of 4932	2240	WScript.exe	87
PID 4932 wrote to memory of 2540	4932	cmd.exe	89
PID 4932 wrote to memory of 2540	4932	cmd.exe	89
PID 4932 wrote to memory of 2540	4932	cmd.exe	89
PID 2540 wrote to memory of 4396	2540	Windows32.exe	90
PID 2540 wrote to memory of 4396	2540	Windows32.exe	90
PID 2540 wrote to memory of 4396	2540	Windows32.exe	90
PID 2540 wrote to memory of 1476	2540	Windows32.exe	91
PID 2540 wrote to memory of 1476	2540	Windows32.exe	91
PID 2540 wrote to memory of 1476	2540	Windows32.exe	91
PID 2540 wrote to memory of 1476	2540	Windows32.exe	91
PID 4396 wrote to memory of 1864	4396	cmd.exe	93
PID 4396 wrote to memory of 1864	4396	cmd.exe	93
PID 4396 wrote to memory of 1864	4396	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\Solara2.0.exe
"C:\Users\Admin\AppData\Local\Temp\Solara2.0.exe"
1⤵
- Adds policy Run key to start application
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1980
- 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
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3448
- - 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
    3⤵
    - UAC bypass
    - System Location Discovery: System Language Discovery
    - Modifies registry key
    PID:4344
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
  2⤵
  - Checks computer location settings
  - Deletes itself
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2240
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\Windows\SysWOW64\Health\Windows32.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4932
  - - C:\Windows\SysWOW64\Health\Windows32.exe
      C:\Windows\SysWOW64\Health\Windows32.exe
      4⤵
      Adds policy Run key to start application
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious behavior: MapViewOfSection
      Suspicious use of WriteProcessMemory
      PID:2540
    - - 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
        5⤵
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:4396
      - 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
        6⤵
        UAC bypass
        System Location Discovery: System Language Discovery
        Modifies registry key
        
        PID:1864
    - - \??\c:\program files (x86)\internet explorer\iexplore.exe
        
        "c:\program files (x86)\internet explorer\iexplore.exe"
        5⤵
        
        PID:1476

Network

DNS

13.86.106.20.in-addr.arpa

Remote address:

8.8.8.8:53

Request

13.86.106.20.in-addr.arpa

IN PTR

Response
DNS

240.143.123.92.in-addr.arpa

Remote address:

8.8.8.8:53

Request

240.143.123.92.in-addr.arpa

IN PTR

Response

240.143.123.92.in-addr.arpa

IN PTR

a92-123-143-240deploystaticakamaitechnologiescom
DNS

22.160.190.20.in-addr.arpa

Remote address:

8.8.8.8:53

Request

22.160.190.20.in-addr.arpa

IN PTR

Response
DNS

95.221.229.192.in-addr.arpa

Remote address:

8.8.8.8:53

Request

95.221.229.192.in-addr.arpa

IN PTR

Response
DNS

232.168.11.51.in-addr.arpa

Remote address:

8.8.8.8:53

Request

232.168.11.51.in-addr.arpa

IN PTR

Response
DNS

26.165.165.52.in-addr.arpa

Remote address:

8.8.8.8:53

Request

26.165.165.52.in-addr.arpa

IN PTR

Response
DNS

171.39.242.20.in-addr.arpa

Remote address:

8.8.8.8:53

Request

171.39.242.20.in-addr.arpa

IN PTR

Response
DNS

121.170.16.2.in-addr.arpa

Remote address:

8.8.8.8:53

Request

121.170.16.2.in-addr.arpa

IN PTR

Response

121.170.16.2.in-addr.arpa

IN PTR

a2-16-170-121deploystaticakamaitechnologiescom
DNS

203.142.123.92.in-addr.arpa

Remote address:

8.8.8.8:53

Request

203.142.123.92.in-addr.arpa

IN PTR

Response

203.142.123.92.in-addr.arpa

IN PTR

a92-123-142-203deploystaticakamaitechnologiescom
DNS

13.227.111.52.in-addr.arpa

Remote address:

8.8.8.8:53

Request

13.227.111.52.in-addr.arpa

IN PTR

Response
DNS

208.143.182.52.in-addr.arpa

Remote address:

8.8.8.8:53

Request

208.143.182.52.in-addr.arpa

IN PTR

Response

No results found

8.8.8.8:53

13.86.106.20.in-addr.arpa

dns

71 B
157 B
1
1

DNS Request

13.86.106.20.in-addr.arpa
8.8.8.8:53

240.143.123.92.in-addr.arpa

dns

73 B
139 B
1
1

DNS Request

240.143.123.92.in-addr.arpa
8.8.8.8:53

22.160.190.20.in-addr.arpa

dns

72 B
158 B
1
1

DNS Request

22.160.190.20.in-addr.arpa
8.8.8.8:53

95.221.229.192.in-addr.arpa

dns

73 B
144 B
1
1

DNS Request

95.221.229.192.in-addr.arpa
8.8.8.8:53

232.168.11.51.in-addr.arpa

dns

72 B
158 B
1
1

DNS Request

232.168.11.51.in-addr.arpa
8.8.8.8:53

26.165.165.52.in-addr.arpa

dns

72 B
146 B
1
1

DNS Request

26.165.165.52.in-addr.arpa
8.8.8.8:53

171.39.242.20.in-addr.arpa

dns

72 B
158 B
1
1

DNS Request

171.39.242.20.in-addr.arpa
8.8.8.8:53

121.170.16.2.in-addr.arpa

dns

71 B
135 B
1
1

DNS Request

121.170.16.2.in-addr.arpa
8.8.8.8:53

203.142.123.92.in-addr.arpa

dns

73 B
139 B
1
1

DNS Request

203.142.123.92.in-addr.arpa
8.8.8.8:53

13.227.111.52.in-addr.arpa

dns

72 B
158 B
1
1

DNS Request

13.227.111.52.in-addr.arpa
8.8.8.8:53

208.143.182.52.in-addr.arpa

dns

73 B
147 B
1
1

DNS Request

208.143.182.52.in-addr.arpa

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

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

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

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\install.vbs

Filesize
532B

MD5
54092daa1c86c0bb88b02c6c785c3f56

SHA1
b18d571d5ae2661afcec864164dcdf504d5f8aa9

SHA256
e04f8f0d847b43ce378eb5732fb167cbb18956fa8f0a56d7ccbe1bd3ef66d3ae

SHA512
e9ab8db402092945eed036f9c91e2571337d4f68810d3ab7233d90b57b80d4900294ab30310003e006473f9314baf2caa658038b97c7d77a87f431b4f9df771e

Download Submit
C:\Windows\SysWOW64\Health\Windows32.exe

Filesize
469KB

MD5
48f4a8f633bf5535811c23a81d8d8506

SHA1
c2a98525bfda82421cb8670db223b19acef31f23

SHA256
9ec9c4c81c67d6628d141981a7020bb7ded83b4c40ff693870cd98eaebf74912

SHA512
7903c322d886bcffc06a9310ba451b0f0eac53d2acedf45b544548ae3656ef477b5a03a86d54452d65461957df4c643082338119bdeb0f2303f528daf0642e29

Download Submit
memory/1476-10-0x0000000001170000-0x00000000011EF000-memory.dmp

Filesize
508KB

Download
memory/1476-9-0x0000000001170000-0x00000000011EF000-memory.dmp

Filesize
508KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

We care about your privacy.