webmonitor | 01a0edfce737d16102372ac1228f4095a3bdab926ecbccf64b452a4e9972a59a

General

Target

JANUARY OVERDUE INVOICE.pdf.exe
Size

1.5MB
MD5

f7d79ec6a3bf524f8f0c0e8d54949948
SHA1

ff9535613f977f6321a1eca20c50e97d23c83259
SHA256

b4fbe906439597a3d05b94f3a7001069687e598cabc9a82e47d6c43046be10a5
SHA512

27dd0344afe613f24147e08aa1208e0fbea2c6618a69a97e48b94a9f412b44273dfd268653dcaec7a83e7fdb10601b6c58ee90bc412601879308f69f7d5d2783

Score

10^/10

webmonitor backdoor infostealer rat

Malware Config

Extracted

Family

webmonitor

C2

niiarmah.wm01.to:443

Attributes

config_key
4EcDHH7aWbl50LayUnuRlJWUXiKQWk0O
private_key
yvkn5wM8E
url_path
/recv5.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 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1840-63-0x0000000000400000-0x00000000004F3000-memory.dmp	family_webmonitor
behavioral1/memory/1840-64-0x0000000000400000-0x00000000004F3000-memory.dmp	family_webmonitor
behavioral1/memory/1840-65-0x0000000000400000-0x00000000004F3000-memory.dmp	family_webmonitor
behavioral1/memory/1840-68-0x0000000000400000-0x00000000004F3000-memory.dmp	family_webmonitor
behavioral1/memory/1840-69-0x0000000000401000-0x00000000004F3000-memory.dmp	family_webmonitor

CustAttr .NET packer 1 IoCs

Detects CustAttr .NET packer in memory.

Processes:

resource	yara_rule
behavioral1/memory/1100-57-0x0000000000BD0000-0x0000000000BDA000-memory.dmp	CustAttr

Suspicious use of SetThreadContext 1 IoCs

Processes:

JANUARY OVERDUE INVOICE.pdf.exe

description pid process target process

PID 1100 set thread context of 1840 1100 JANUARY OVERDUE INVOICE.pdf.exe RegSvcs.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

304 schtasks.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

JANUARY OVERDUE INVOICE.pdf.exe

pid process

1100 JANUARY OVERDUE INVOICE.pdf.exe
1100 JANUARY OVERDUE INVOICE.pdf.exe
1100 JANUARY OVERDUE INVOICE.pdf.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

JANUARY OVERDUE INVOICE.pdf.exeRegSvcs.exe

description pid process

Token: SeDebugPrivilege 1100 JANUARY OVERDUE INVOICE.pdf.exe
Token: SeShutdownPrivilege 1840 RegSvcs.exe

description	pid	process	target process
PID 1100 set thread context of 1840	1100	JANUARY OVERDUE INVOICE.pdf.exe	RegSvcs.exe

pid	process
304	schtasks.exe

pid	process
1100	JANUARY OVERDUE INVOICE.pdf.exe
1100	JANUARY OVERDUE INVOICE.pdf.exe
1100	JANUARY OVERDUE INVOICE.pdf.exe

description	pid	process
Token: SeDebugPrivilege	1100	JANUARY OVERDUE INVOICE.pdf.exe
Token: SeShutdownPrivilege	1840	RegSvcs.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

JANUARY OVERDUE INVOICE.pdf.exe

description	pid	process	target process
PID 1100 wrote to memory of 304	1100	JANUARY OVERDUE INVOICE.pdf.exe	schtasks.exe
PID 1100 wrote to memory of 304	1100	JANUARY OVERDUE INVOICE.pdf.exe	schtasks.exe
PID 1100 wrote to memory of 304	1100	JANUARY OVERDUE INVOICE.pdf.exe	schtasks.exe
PID 1100 wrote to memory of 304	1100	JANUARY OVERDUE INVOICE.pdf.exe	schtasks.exe
PID 1100 wrote to memory of 1840	1100	JANUARY OVERDUE INVOICE.pdf.exe	RegSvcs.exe
PID 1100 wrote to memory of 1840	1100	JANUARY OVERDUE INVOICE.pdf.exe	RegSvcs.exe
PID 1100 wrote to memory of 1840	1100	JANUARY OVERDUE INVOICE.pdf.exe	RegSvcs.exe
PID 1100 wrote to memory of 1840	1100	JANUARY OVERDUE INVOICE.pdf.exe	RegSvcs.exe
PID 1100 wrote to memory of 1840	1100	JANUARY OVERDUE INVOICE.pdf.exe	RegSvcs.exe
PID 1100 wrote to memory of 1840	1100	JANUARY OVERDUE INVOICE.pdf.exe	RegSvcs.exe
PID 1100 wrote to memory of 1840	1100	JANUARY OVERDUE INVOICE.pdf.exe	RegSvcs.exe
PID 1100 wrote to memory of 1840	1100	JANUARY OVERDUE INVOICE.pdf.exe	RegSvcs.exe
PID 1100 wrote to memory of 1840	1100	JANUARY OVERDUE INVOICE.pdf.exe	RegSvcs.exe
PID 1100 wrote to memory of 1840	1100	JANUARY OVERDUE INVOICE.pdf.exe	RegSvcs.exe
PID 1100 wrote to memory of 1840	1100	JANUARY OVERDUE INVOICE.pdf.exe	RegSvcs.exe
PID 1100 wrote to memory of 1840	1100	JANUARY OVERDUE INVOICE.pdf.exe	RegSvcs.exe
PID 1100 wrote to memory of 1840	1100	JANUARY OVERDUE INVOICE.pdf.exe	RegSvcs.exe

C:\Users\Admin\AppData\Local\Temp\JANUARY OVERDUE INVOICE.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\JANUARY OVERDUE INVOICE.pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1100
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\LbDmDauhDnWnVS" /XML "C:\Users\Admin\AppData\Local\Temp\tmp730D.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:304
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1840

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp730D.tmp

MD5
e9770f75c77fd3b67cd2d075663087b3

SHA1
49baecc09000e1ee24b31284d3ef52af484eed83

SHA256
5494fe9c0da46481e2157fb40fc945e6111cccb26fa12993dc5d7c57f4ce3baf

SHA512
054494cb1b5118e4e35a980e93f44fbcbb5a060900a37ab2752be9934b5564d3accaaaf4495ab2e20501eaff733e4012976e120d9c9bf9daf85d2b577d1397cb

Download Submit
memory/1100-53-0x0000000001010000-0x0000000001196000-memory.dmp

Filesize
1.5MB

Download
memory/1100-54-0x0000000075891000-0x0000000075893000-memory.dmp

Filesize
8KB

Download
memory/1100-55-0x0000000000F30000-0x0000000000F31000-memory.dmp

Filesize
4KB

Download
memory/1100-56-0x000000007EF40000-0x000000007EFA0000-memory.dmp

Filesize
384KB

Download
memory/1100-57-0x0000000000BD0000-0x0000000000BDA000-memory.dmp

Filesize
40KB

Download
memory/1100-58-0x00000000052E0000-0x00000000053D4000-memory.dmp

Filesize
976KB

Download
memory/1100-59-0x0000000007860000-0x000000000795E000-memory.dmp

Filesize
1016KB

Download
memory/1840-61-0x0000000000400000-0x00000000004F3000-memory.dmp

Filesize
972KB

Download
memory/1840-62-0x0000000000400000-0x00000000004F3000-memory.dmp

Filesize
972KB

Download
memory/1840-63-0x0000000000400000-0x00000000004F3000-memory.dmp

Filesize
972KB

Download
memory/1840-64-0x0000000000400000-0x00000000004F3000-memory.dmp

Filesize
972KB

Download
memory/1840-65-0x0000000000400000-0x00000000004F3000-memory.dmp

Filesize
972KB

Download
memory/1840-68-0x0000000000400000-0x00000000004F3000-memory.dmp

Filesize
972KB

Download
memory/1840-69-0x0000000000401000-0x00000000004F3000-memory.dmp

Filesize
968KB

Download
memory/1840-70-0x0000000002FB0000-0x0000000003FB0000-memory.dmp

Filesize
16.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads