webmonitor | e0fb9bf9bd903a2ea4bc952b168482bd15af73dd1b4ae47529aa10fe6a9112a0

General

Target

fe4f22e8d5f3a4b2bcd81bd69429c12b.exe
Size

2.0MB
MD5

fe4f22e8d5f3a4b2bcd81bd69429c12b
SHA1

50eec07da09636ab7108e93a2a17224724d5f8c2
SHA256

e0fb9bf9bd903a2ea4bc952b168482bd15af73dd1b4ae47529aa10fe6a9112a0
SHA512

6295463804ae0b84e90a6dc04d4a673fce7eea5c8f3a9017aae52eb4ea6c0a522e94fe8f9b5403cd42449a78aac438d0d53e44457581d67c4cd94886054b0ef2

Score

10^/10

webmonitor backdoor infostealer persistence rat suricata upx

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,\"C:\\Users\\Admin\\AppData\\Roaming\\stream.exe\","	regasm.exe

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 1 IoCs

resource	yara_rule
behavioral2/memory/2276-141-0x00000000005F5A70-mapping.dmp	family_webmonitor

suricata: ET MALWARE WebMonitor/RevCode RAT CnC Domain in DNS Lookup
suricata

Executes dropped EXE 3 IoCs

pid	Process
3732	Anyname.exe
640	Patch.exe
2276	MSBuild.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000200000001ab50-118.dat	upx
behavioral2/files/0x000200000001ab50-119.dat	upx
behavioral2/memory/2276-140-0x0000000000400000-0x00000000005F7000-memory.dmp	upx
behavioral2/memory/2276-143-0x0000000000400000-0x00000000005F7000-memory.dmp	upx

Loads dropped DLL 1 IoCs

pid	Process
640	Patch.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 860 set thread context of 576	860	fe4f22e8d5f3a4b2bcd81bd69429c12b.exe	78
PID 576 set thread context of 2276	576	regasm.exe	82

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
576	regasm.exe
576	regasm.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
860	fe4f22e8d5f3a4b2bcd81bd69429c12b.exe
860	fe4f22e8d5f3a4b2bcd81bd69429c12b.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	576	regasm.exe
Token: SeDebugPrivilege	2276	MSBuild.exe
Token: SeShutdownPrivilege	2276	MSBuild.exe
Token: SeCreatePagefilePrivilege	2276	MSBuild.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
860	fe4f22e8d5f3a4b2bcd81bd69429c12b.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 860 wrote to memory of 3732	860	fe4f22e8d5f3a4b2bcd81bd69429c12b.exe	75
PID 860 wrote to memory of 3732	860	fe4f22e8d5f3a4b2bcd81bd69429c12b.exe	75
PID 860 wrote to memory of 3732	860	fe4f22e8d5f3a4b2bcd81bd69429c12b.exe	75
PID 3732 wrote to memory of 640	3732	Anyname.exe	76
PID 3732 wrote to memory of 640	3732	Anyname.exe	76
PID 3732 wrote to memory of 640	3732	Anyname.exe	76
PID 860 wrote to memory of 2424	860	fe4f22e8d5f3a4b2bcd81bd69429c12b.exe	77
PID 860 wrote to memory of 2424	860	fe4f22e8d5f3a4b2bcd81bd69429c12b.exe	77
PID 860 wrote to memory of 2424	860	fe4f22e8d5f3a4b2bcd81bd69429c12b.exe	77
PID 860 wrote to memory of 2424	860	fe4f22e8d5f3a4b2bcd81bd69429c12b.exe	77
PID 860 wrote to memory of 576	860	fe4f22e8d5f3a4b2bcd81bd69429c12b.exe	78
PID 860 wrote to memory of 576	860	fe4f22e8d5f3a4b2bcd81bd69429c12b.exe	78
PID 860 wrote to memory of 576	860	fe4f22e8d5f3a4b2bcd81bd69429c12b.exe	78
PID 860 wrote to memory of 576	860	fe4f22e8d5f3a4b2bcd81bd69429c12b.exe	78
PID 576 wrote to memory of 2276	576	regasm.exe	82
PID 576 wrote to memory of 2276	576	regasm.exe	82
PID 576 wrote to memory of 2276	576	regasm.exe	82
PID 576 wrote to memory of 2276	576	regasm.exe	82
PID 576 wrote to memory of 2276	576	regasm.exe	82
PID 576 wrote to memory of 2276	576	regasm.exe	82
PID 576 wrote to memory of 2276	576	regasm.exe	82

C:\Users\Admin\AppData\Local\Temp\fe4f22e8d5f3a4b2bcd81bd69429c12b.exe
"C:\Users\Admin\AppData\Local\Temp\fe4f22e8d5f3a4b2bcd81bd69429c12b.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:860
- C:\ProgramData\Anyname.exe
  "C:\ProgramData\Anyname.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:3732
- - C:\Users\Admin\AppData\Local\Temp\Patch.exe
    Patch.exe /silent
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    PID:640
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe"
  2⤵
  PID:2424
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe"
  2⤵
  - Modifies WinLogon for persistence
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:576
- - C:\Users\Admin\AppData\Local\Temp\MSBuild.exe
    C:\Users\Admin\AppData\Local\Temp\MSBuild.exe
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:2276

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1

T1004

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/576-126-0x0000000000400000-0x000000000057B000-memory.dmp

Filesize
1.5MB

Download
memory/576-133-0x00000000057B0000-0x00000000057B1000-memory.dmp

Filesize
4KB

Download
memory/576-139-0x0000000007460000-0x00000000074DC000-memory.dmp

Filesize
496KB

Download
memory/576-134-0x0000000007160000-0x0000000007252000-memory.dmp

Filesize
968KB

Download
memory/576-127-0x0000000001130000-0x00000000011DE000-memory.dmp

Filesize
696KB

Download
memory/576-130-0x0000000005B60000-0x0000000005B61000-memory.dmp

Filesize
4KB

Download
memory/576-131-0x0000000005710000-0x0000000005711000-memory.dmp

Filesize
4KB

Download
memory/576-132-0x0000000005660000-0x0000000005B5E000-memory.dmp

Filesize
5.0MB

Download
memory/860-116-0x00000000007A0000-0x00000000007A1000-memory.dmp

Filesize
4KB

Download
memory/860-124-0x00000000024F0000-0x00000000024F8000-memory.dmp

Filesize
32KB

Download
memory/2276-140-0x0000000000400000-0x00000000005F7000-memory.dmp

Filesize
2.0MB

Download
memory/2276-143-0x0000000000400000-0x00000000005F7000-memory.dmp

Filesize
2.0MB

Download
memory/2276-144-0x00000000038B0000-0x00000000048B0000-memory.dmp

Filesize
16.0MB

Download

Analysis

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