webmonitor | 0b41b1f1d338b4b082a88a385334d4cc85b6b7ef582bf15c5bd104839f195348

General

Target

0b41b1f1d338b4b082a88a385334d4cc85b6b7ef582bf15c5bd104839f195348.exe
Size

1.6MB
MD5

727c2d4c6016849316ae589295508acc
SHA1

9782d9c356d7c7f83a92daf941cd0e34b2301e32
SHA256

0b41b1f1d338b4b082a88a385334d4cc85b6b7ef582bf15c5bd104839f195348
SHA512

cf083b91c210cc43006410648d096519cc45f6d2db40f2980f4b2816784ddfa8cf2b40b5eec277e0986cd192d3285806293d17ffd944d3376e9fa6798324bab8

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

Executes dropped EXE 2 IoCs

pid	Process
640	regsa.exe
804	crd_kg.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/640-128-0x00000000052F0000-0x000000000533B000-memory.dmp	upx
behavioral2/memory/4004-129-0x0000000000400000-0x00000000004C1000-memory.dmp	upx
behavioral2/memory/4004-132-0x0000000000400000-0x00000000004C1000-memory.dmp	upx

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows\CurrentVersion\Run\WebMonitor-48c4 = "C:\\Users\\Admin\\AppData\\Roaming\\WebMonitor-48c4.exe"	RegAsm.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows\CurrentVersion\Run\regas.exe = "C:\\Users\\Admin\\AppData\\Roaming\\regas.exe"	regsa.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 640 set thread context of 4004	640	regsa.exe	78

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
640	regsa.exe
640	regsa.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	640	regsa.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 3016 wrote to memory of 640	3016	0b41b1f1d338b4b082a88a385334d4cc85b6b7ef582bf15c5bd104839f195348.exe	72
PID 3016 wrote to memory of 640	3016	0b41b1f1d338b4b082a88a385334d4cc85b6b7ef582bf15c5bd104839f195348.exe	72
PID 3016 wrote to memory of 640	3016	0b41b1f1d338b4b082a88a385334d4cc85b6b7ef582bf15c5bd104839f195348.exe	72
PID 3016 wrote to memory of 804	3016	0b41b1f1d338b4b082a88a385334d4cc85b6b7ef582bf15c5bd104839f195348.exe	73
PID 3016 wrote to memory of 804	3016	0b41b1f1d338b4b082a88a385334d4cc85b6b7ef582bf15c5bd104839f195348.exe	73
PID 3016 wrote to memory of 804	3016	0b41b1f1d338b4b082a88a385334d4cc85b6b7ef582bf15c5bd104839f195348.exe	73
PID 640 wrote to memory of 4004	640	regsa.exe	78
PID 640 wrote to memory of 4004	640	regsa.exe	78
PID 640 wrote to memory of 4004	640	regsa.exe	78
PID 640 wrote to memory of 4004	640	regsa.exe	78
PID 640 wrote to memory of 4004	640	regsa.exe	78
PID 640 wrote to memory of 4004	640	regsa.exe	78
PID 640 wrote to memory of 4004	640	regsa.exe	78

C:\Users\Admin\AppData\Local\Temp\0b41b1f1d338b4b082a88a385334d4cc85b6b7ef582bf15c5bd104839f195348.exe
"C:\Users\Admin\AppData\Local\Temp\0b41b1f1d338b4b082a88a385334d4cc85b6b7ef582bf15c5bd104839f195348.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3016
- C:\Users\Admin\AppData\Local\Temp\regsa.exe
  C:\Users\Admin\AppData\Local\Temp/regsa.exe
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:640
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
    "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
    3⤵
    - Adds Run key to start application
    PID:4004
- C:\Users\Admin\AppData\Local\Temp\crd_kg.exe
  C:\Users\Admin\AppData\Local\Temp/crd_kg.exe
  2⤵
  - Executes dropped EXE
  PID:804

Network

MITRE ATT&CK Enterprise 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

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/640-127-0x0000000005380000-0x0000000005381000-memory.dmp

Filesize
4KB

Download
memory/640-128-0x00000000052F0000-0x000000000533B000-memory.dmp

Filesize
300KB

Download
memory/640-120-0x0000000000750000-0x0000000000751000-memory.dmp

Filesize
4KB

Download
memory/640-122-0x0000000005580000-0x0000000005581000-memory.dmp

Filesize
4KB

Download
memory/640-123-0x0000000005120000-0x000000000519B000-memory.dmp

Filesize
492KB

Download
memory/640-126-0x00000000051A0000-0x00000000051C1000-memory.dmp

Filesize
132KB

Download
memory/640-125-0x0000000005050000-0x000000000557C000-memory.dmp

Filesize
5.2MB

Download
memory/640-131-0x0000000005050000-0x000000000557C000-memory.dmp

Filesize
5.2MB

Download
memory/804-124-0x0000000000C50000-0x0000000000C51000-memory.dmp

Filesize
4KB

Download
memory/804-133-0x0000000000C53000-0x0000000000C55000-memory.dmp

Filesize
8KB

Download
memory/4004-129-0x0000000000400000-0x00000000004C1000-memory.dmp

Filesize
772KB

Download
memory/4004-132-0x0000000000400000-0x00000000004C1000-memory.dmp

Filesize
772KB

Download

Analysis

Sharing