webmonitor | d1623332c586135747a2575bec4ee783f299c5fca0f527f0328ea47691e9506d

General

Target

ExcelViewerss.exe
Size

571KB
MD5

40d56ef0857cd5fe0ba21d20c73686e2
SHA1

90a8bdadbdebfcaf3a1e146472d56db7d531f921
SHA256

d1623332c586135747a2575bec4ee783f299c5fca0f527f0328ea47691e9506d
SHA512

74953fa8056f17e96831cf932a482907af00ef22008a4c829da339d3c55fb9696ba812c605155486971cdc4427cb85bf4d63f0e29ffdb46c602be083bdcdc038

Score

10^/10

webmonitor backdoor infostealer persistence rat upx

Malware Config

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

UPX packed file 1 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1456-67-0x0000000000400000-0x00000000004F6000-memory.dmp	upx

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

ExcelViewerss.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Windows\CurrentVersion\Run\WebMonitor-3c00 = "C:\\Users\\Admin\\AppData\\Roaming\\WebMonitor-3c00.exe"	ExcelViewerss.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\WebMonitor-3c00 = "C:\\Users\\Admin\\AppData\\Roaming\\WebMonitor-3c00.exe"	ExcelViewerss.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

ExcelViewerss.exe

description pid process target process

PID 1100 set thread context of 1456 1100 ExcelViewerss.exe ExcelViewerss.exe
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

ExcelViewerss.exe

pid process

1100 ExcelViewerss.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

ExcelViewerss.exe

description pid process

Token: SeShutdownPrivilege 1456 ExcelViewerss.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

ExcelViewerss.exeExcelViewerss.exe

pid process

1100 ExcelViewerss.exe
1456 ExcelViewerss.exe

description	pid	process	target process
PID 1100 set thread context of 1456	1100	ExcelViewerss.exe	ExcelViewerss.exe

pid	process
1100	ExcelViewerss.exe

description	pid	process
Token: SeShutdownPrivilege	1456	ExcelViewerss.exe

pid	process
1100	ExcelViewerss.exe
1456	ExcelViewerss.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

ExcelViewerss.exe

description	pid	process	target process
PID 1100 wrote to memory of 1456	1100	ExcelViewerss.exe	ExcelViewerss.exe
PID 1100 wrote to memory of 1456	1100	ExcelViewerss.exe	ExcelViewerss.exe
PID 1100 wrote to memory of 1456	1100	ExcelViewerss.exe	ExcelViewerss.exe
PID 1100 wrote to memory of 1456	1100	ExcelViewerss.exe	ExcelViewerss.exe
PID 1100 wrote to memory of 1456	1100	ExcelViewerss.exe	ExcelViewerss.exe

C:\Users\Admin\AppData\Local\Temp\ExcelViewerss.exe
"C:\Users\Admin\AppData\Local\Temp\ExcelViewerss.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1100

C:\Users\Admin\AppData\Local\Temp\ExcelViewerss.exe
"C:\Users\Admin\AppData\Local\Temp\ExcelViewerss.exe"
2⤵
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:1456

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/1100-62-0x0000000075A31000-0x0000000075A33000-memory.dmp

Filesize
8KB

Download
memory/1100-66-0x0000000000240000-0x0000000000248000-memory.dmp

Filesize
32KB

Download
memory/1100-65-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

Download
memory/1456-63-0x00000000004F4AD0-mapping.dmp

Download
memory/1456-67-0x0000000000400000-0x00000000004F6000-memory.dmp

Filesize
984KB

Download
memory/1456-68-0x0000000000270000-0x0000000000271000-memory.dmp

Filesize
4KB

Download
memory/1456-69-0x0000000002C40000-0x0000000003C40000-memory.dmp

Filesize
16.0MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads