webmonitor | 48d173767bf24bb9ad394d2581ecedfdefc4e31fd79b114a79a196eca7fb8876

Analysis

max time kernel
182s
max time network
198s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
16-05-2022 12:52

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General

Target

48d173767bf24bb9ad394d2581ecedfdefc4e31fd79b114a79a196eca7fb8876.exe
Size

17.2MB
MD5

ee9a4ee14382824e759636426db0aa6f
SHA1

5ff8faa6df6c1ef352d4938be39a97092dd1c7c7
SHA256

48d173767bf24bb9ad394d2581ecedfdefc4e31fd79b114a79a196eca7fb8876
SHA512

4c7a3f81eb713b68c5cf8376ec5f55428294732f2c97bf5cd8bea876d569d2bf1e2d3a9c09e64b51411deaf37f1670d02a1cf192e7427f9cef3135f4a09b6656

Score

10^/10

webmonitor backdoor infostealer persistence rat

Malware Config

Extracted

Family

webmonitor

worldbala.wm01.to:443

Attributes

config_key
1vt5MKV6CcJnGWsNVlYXmKcidNN2mBKt
private_key
NcwyDvFB8
url_path
/recv4.php

Signatures

RevcodeRat, WebMonitorRat
WebMonitor is a remote access tool that you can use from any browser access to control, and monitor your phones, or PCs.
backdoor rat infostealer webmonitor

WebMonitor Payload 4 IoCs

resource	yara_rule
behavioral2/memory/4976-147-0x0000000000400000-0x00000000004BE000-memory.dmp	family_webmonitor
behavioral2/memory/4976-148-0x0000000000400000-0x00000000004BE000-memory.dmp	family_webmonitor
behavioral2/memory/4976-149-0x0000000000400000-0x00000000004BE000-memory.dmp	family_webmonitor
behavioral2/memory/4976-150-0x0000000000400000-0x00000000004BE000-memory.dmp	family_webmonitor

Executes dropped EXE 1 IoCs

pid	Process
2344	GfnWebBrowser.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-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation	48d173767bf24bb9ad394d2581ecedfdefc4e31fd79b114a79a196eca7fb8876.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation	GfnWebBrowser.exe

Unexpected DNS network traffic destination 1 IoCs

Network traffic to other servers than the configured DNS servers was detected on the DNS port.

description	ioc
Destination IP	185.243.215.214

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\GfnWebBrowser = "C:\\Users\\Admin\\AppData\\Roaming\\GfnWebBrowser.exe -boot"	GfnWebBrowser.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2344 set thread context of 4976	2344	GfnWebBrowser.exe	111

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

System Information Discovery
T1082

NTFS ADS 5 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\GfnWebBrowser.exe\:Zone.Identifier:$DATA	cmd.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\GfnWebBrowser.exe:Zone.Identifier	cmd.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\GfnWebBrowser.exe:Zone.Identifier	cmd.exe
File created	C:\Users\Admin\AppData\Local\Temp\48d173767bf24bb9ad394d2581ecedfdefc4e31fd79b114a79a196eca7fb8876.exe:Zone.Identifier	cmd.exe
File opened for modification	C:\Users\Admin\AppData\Local\Temp\48d173767bf24bb9ad394d2581ecedfdefc4e31fd79b114a79a196eca7fb8876.exe:Zone.Identifier	cmd.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	400	48d173767bf24bb9ad394d2581ecedfdefc4e31fd79b114a79a196eca7fb8876.exe
Token: SeDebugPrivilege	2344	GfnWebBrowser.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 400 wrote to memory of 1324	400	48d173767bf24bb9ad394d2581ecedfdefc4e31fd79b114a79a196eca7fb8876.exe	87
PID 400 wrote to memory of 1324	400	48d173767bf24bb9ad394d2581ecedfdefc4e31fd79b114a79a196eca7fb8876.exe	87
PID 400 wrote to memory of 1324	400	48d173767bf24bb9ad394d2581ecedfdefc4e31fd79b114a79a196eca7fb8876.exe	87
PID 400 wrote to memory of 3668	400	48d173767bf24bb9ad394d2581ecedfdefc4e31fd79b114a79a196eca7fb8876.exe	89
PID 400 wrote to memory of 3668	400	48d173767bf24bb9ad394d2581ecedfdefc4e31fd79b114a79a196eca7fb8876.exe	89
PID 400 wrote to memory of 3668	400	48d173767bf24bb9ad394d2581ecedfdefc4e31fd79b114a79a196eca7fb8876.exe	89
PID 400 wrote to memory of 944	400	48d173767bf24bb9ad394d2581ecedfdefc4e31fd79b114a79a196eca7fb8876.exe	96
PID 400 wrote to memory of 944	400	48d173767bf24bb9ad394d2581ecedfdefc4e31fd79b114a79a196eca7fb8876.exe	96
PID 400 wrote to memory of 944	400	48d173767bf24bb9ad394d2581ecedfdefc4e31fd79b114a79a196eca7fb8876.exe	96
PID 400 wrote to memory of 3672	400	48d173767bf24bb9ad394d2581ecedfdefc4e31fd79b114a79a196eca7fb8876.exe	104
PID 400 wrote to memory of 3672	400	48d173767bf24bb9ad394d2581ecedfdefc4e31fd79b114a79a196eca7fb8876.exe	104
PID 400 wrote to memory of 3672	400	48d173767bf24bb9ad394d2581ecedfdefc4e31fd79b114a79a196eca7fb8876.exe	104
PID 3672 wrote to memory of 2344	3672	cmd.exe	106
PID 3672 wrote to memory of 2344	3672	cmd.exe	106
PID 3672 wrote to memory of 2344	3672	cmd.exe	106
PID 2344 wrote to memory of 3420	2344	GfnWebBrowser.exe	107
PID 2344 wrote to memory of 3420	2344	GfnWebBrowser.exe	107
PID 2344 wrote to memory of 3420	2344	GfnWebBrowser.exe	107
PID 2344 wrote to memory of 4664	2344	GfnWebBrowser.exe	109
PID 2344 wrote to memory of 4664	2344	GfnWebBrowser.exe	109
PID 2344 wrote to memory of 4664	2344	GfnWebBrowser.exe	109
PID 2344 wrote to memory of 4976	2344	GfnWebBrowser.exe	111
PID 2344 wrote to memory of 4976	2344	GfnWebBrowser.exe	111
PID 2344 wrote to memory of 4976	2344	GfnWebBrowser.exe	111
PID 2344 wrote to memory of 4976	2344	GfnWebBrowser.exe	111
PID 2344 wrote to memory of 4976	2344	GfnWebBrowser.exe	111
PID 2344 wrote to memory of 4976	2344	GfnWebBrowser.exe	111
PID 2344 wrote to memory of 4976	2344	GfnWebBrowser.exe	111
PID 2344 wrote to memory of 4976	2344	GfnWebBrowser.exe	111
PID 2344 wrote to memory of 4976	2344	GfnWebBrowser.exe	111

C:\Users\Admin\AppData\Local\Temp\48d173767bf24bb9ad394d2581ecedfdefc4e31fd79b114a79a196eca7fb8876.exe
"C:\Users\Admin\AppData\Local\Temp\48d173767bf24bb9ad394d2581ecedfdefc4e31fd79b114a79a196eca7fb8876.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:400
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C type nul > "C:\Users\Admin\AppData\Local\Temp\48d173767bf24bb9ad394d2581ecedfdefc4e31fd79b114a79a196eca7fb8876.exe:Zone.Identifier"
  2⤵
  - NTFS ADS
  PID:1324
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C type nul > "C:\Users\Admin\AppData\Local\Temp\48d173767bf24bb9ad394d2581ecedfdefc4e31fd79b114a79a196eca7fb8876.exe:Zone.Identifier"
  2⤵
  - NTFS ADS
  PID:3668
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c copy "C:\Users\Admin\AppData\Local\Temp\48d173767bf24bb9ad394d2581ecedfdefc4e31fd79b114a79a196eca7fb8876.exe" "C:\Users\Admin\AppData\Roaming\GfnWebBrowser.exe"
  2⤵
  - NTFS ADS
  PID:944
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c, "C:\Users\Admin\AppData\Roaming\GfnWebBrowser.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3672
- - C:\Users\Admin\AppData\Roaming\GfnWebBrowser.exe
    "C:\Users\Admin\AppData\Roaming\GfnWebBrowser.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Adds Run key to start application
    - Suspicious use of SetThreadContext
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2344
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C type nul > "C:\Users\Admin\AppData\Roaming\GfnWebBrowser.exe:Zone.Identifier"
      4⤵
      NTFS ADS
      PID:3420
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C type nul > "C:\Users\Admin\AppData\Roaming\GfnWebBrowser.exe:Zone.Identifier"
      4⤵
      NTFS ADS
      PID:4664
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe"
      4⤵
      PID:4976

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\GfnWebBrowser.exe

Filesize
17.2MB

MD5
ee9a4ee14382824e759636426db0aa6f

SHA1
5ff8faa6df6c1ef352d4938be39a97092dd1c7c7

SHA256
48d173767bf24bb9ad394d2581ecedfdefc4e31fd79b114a79a196eca7fb8876

SHA512
4c7a3f81eb713b68c5cf8376ec5f55428294732f2c97bf5cd8bea876d569d2bf1e2d3a9c09e64b51411deaf37f1670d02a1cf192e7427f9cef3135f4a09b6656

Download Submit
C:\Users\Admin\AppData\Roaming\GfnWebBrowser.exe

Filesize
17.2MB

MD5
ee9a4ee14382824e759636426db0aa6f

SHA1
5ff8faa6df6c1ef352d4938be39a97092dd1c7c7

SHA256
48d173767bf24bb9ad394d2581ecedfdefc4e31fd79b114a79a196eca7fb8876

SHA512
4c7a3f81eb713b68c5cf8376ec5f55428294732f2c97bf5cd8bea876d569d2bf1e2d3a9c09e64b51411deaf37f1670d02a1cf192e7427f9cef3135f4a09b6656

Download Submit
memory/400-130-0x0000000000D30000-0x0000000001DD2000-memory.dmp

Filesize
16.6MB

Download
memory/400-132-0x0000000007120000-0x0000000007186000-memory.dmp

Filesize
408KB

Download
memory/400-133-0x0000000007360000-0x0000000007522000-memory.dmp

Filesize
1.8MB

Download
memory/400-134-0x0000000006670000-0x0000000006692000-memory.dmp

Filesize
136KB

Download
memory/400-135-0x0000000007AE0000-0x0000000008084000-memory.dmp

Filesize
5.6MB

Download
memory/400-137-0x0000000007270000-0x0000000007302000-memory.dmp

Filesize
584KB

Download
memory/2344-145-0x0000000002250000-0x00000000022EC000-memory.dmp

Filesize
624KB

Download
memory/4976-147-0x0000000000400000-0x00000000004BE000-memory.dmp

Filesize
760KB

Download
memory/4976-148-0x0000000000400000-0x00000000004BE000-memory.dmp

Filesize
760KB

Download
memory/4976-149-0x0000000000400000-0x00000000004BE000-memory.dmp

Filesize
760KB

Download
memory/4976-150-0x0000000000400000-0x00000000004BE000-memory.dmp

Filesize
760KB

Download