Malware Analysis Report

2024-11-16 13:36

Sample ID 240528-pzblzafa64
Target WinRAR ZIP archive.exe
SHA256 76b468b3bf39c664e1be3c31a8ed9ea3f7598c0fdceb65a4b344a9991ef79ec7
Tags
xworm execution persistence rat trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

76b468b3bf39c664e1be3c31a8ed9ea3f7598c0fdceb65a4b344a9991ef79ec7

Threat Level: Known bad

The file WinRAR ZIP archive.exe was found to be: Known bad.

Malicious Activity Summary

xworm execution persistence rat trojan

Detect Xworm Payload

Xworm

Command and Scripting Interpreter: PowerShell

Checks computer location settings

Executes dropped EXE

Drops startup file

Legitimate hosting services abused for malware hosting/C2

Looks up external IP address via web service

Adds Run key to start application

Unsigned PE

Enumerates physical storage devices

Uses Task Scheduler COM API

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Creates scheduled task(s)

Suspicious behavior: EnumeratesProcesses

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-28 12:45

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-28 12:45

Reported

2024-05-28 12:48

Platform

win10v2004-20240426-en

Max time kernel

147s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\WinRAR ZIP archive.exe"

Signatures

Detect Xworm Payload

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

Xworm

trojan rat xworm

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\WinRAR ZIP archive.exe N/A
Key value queried \REGISTRY\USER\S-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\Client.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Client.lnk C:\Users\Admin\AppData\Local\Temp\Client.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Client.lnk C:\Users\Admin\AppData\Local\Temp\Client.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Client.exe N/A
N/A N/A C:\ProgramData\Client.exe N/A
N/A N/A C:\ProgramData\Client.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3906287020-2915474608-1755617787-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Client = "C:\\ProgramData\\Client.exe" C:\Users\Admin\AppData\Local\Temp\Client.exe N/A

Legitimate hosting services abused for malware hosting/C2

Description Indicator Process Target
N/A pastebin.com N/A N/A
N/A pastebin.com N/A N/A

Looks up external IP address via web service

Description Indicator Process Target
N/A ip-api.com N/A N/A

Enumerates physical storage devices

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\System32\schtasks.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Client.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Client.exe N/A
Token: SeDebugPrivilege N/A C:\ProgramData\Client.exe N/A
Token: SeDebugPrivilege N/A C:\ProgramData\Client.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Client.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4632 wrote to memory of 4708 N/A C:\Users\Admin\AppData\Local\Temp\WinRAR ZIP archive.exe C:\Users\Admin\AppData\Local\Temp\Client.exe
PID 4632 wrote to memory of 4708 N/A C:\Users\Admin\AppData\Local\Temp\WinRAR ZIP archive.exe C:\Users\Admin\AppData\Local\Temp\Client.exe
PID 4708 wrote to memory of 316 N/A C:\Users\Admin\AppData\Local\Temp\Client.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4708 wrote to memory of 316 N/A C:\Users\Admin\AppData\Local\Temp\Client.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4708 wrote to memory of 5212 N/A C:\Users\Admin\AppData\Local\Temp\Client.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4708 wrote to memory of 5212 N/A C:\Users\Admin\AppData\Local\Temp\Client.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4708 wrote to memory of 1812 N/A C:\Users\Admin\AppData\Local\Temp\Client.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4708 wrote to memory of 1812 N/A C:\Users\Admin\AppData\Local\Temp\Client.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4708 wrote to memory of 2416 N/A C:\Users\Admin\AppData\Local\Temp\Client.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4708 wrote to memory of 2416 N/A C:\Users\Admin\AppData\Local\Temp\Client.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4708 wrote to memory of 5116 N/A C:\Users\Admin\AppData\Local\Temp\Client.exe C:\Windows\System32\schtasks.exe
PID 4708 wrote to memory of 5116 N/A C:\Users\Admin\AppData\Local\Temp\Client.exe C:\Windows\System32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\WinRAR ZIP archive.exe

"C:\Users\Admin\AppData\Local\Temp\WinRAR ZIP archive.exe"

C:\Users\Admin\AppData\Local\Temp\Client.exe

"C:\Users\Admin\AppData\Local\Temp\Client.exe"

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Client.exe'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Client.exe'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\Client.exe'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Client.exe'

C:\Windows\System32\schtasks.exe

"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Client" /tr "C:\ProgramData\Client.exe"

C:\ProgramData\Client.exe

C:\ProgramData\Client.exe

C:\ProgramData\Client.exe

C:\ProgramData\Client.exe

Network

Country Destination Domain Proto
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 17.53.126.40.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 ip-api.com udp
US 208.95.112.1:80 ip-api.com tcp
US 8.8.8.8:53 1.112.95.208.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 pastebin.com udp
US 172.67.19.24:443 pastebin.com tcp
US 8.8.8.8:53 24.19.67.172.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 18.24.18.2.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\Client.exe

MD5 03557348a17089f5eb64b6e1c74a30d0
SHA1 f2b334fa78072eda2fc5e8f76ff1b96c500e0ff9
SHA256 26f6a921b85d86b226a45e44de9305ba16f15c6de72c29155fbdc7da9b5e6393
SHA512 23a9ee48bc34d713f39a8cbbc92e2ae65d1487d2533df58878af247fd99553d51965775ce496e2402bc7270bff0130795fb1fe3429da99e23570c0a668937094

memory/4708-14-0x00007FF98E8C3000-0x00007FF98E8C5000-memory.dmp

memory/4708-15-0x0000000000130000-0x000000000014E000-memory.dmp

memory/4708-16-0x00007FF98E8C0000-0x00007FF98F381000-memory.dmp

memory/316-17-0x00000179C06D0000-0x00000179C06F2000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_kfijzp2n.mjk.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

MD5 d85ba6ff808d9e5444a4b369f5bc2730
SHA1 31aa9d96590fff6981b315e0b391b575e4c0804a
SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
SHA512 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

MD5 6d42b6da621e8df5674e26b799c8e2aa
SHA1 ab3ce1327ea1eeedb987ec823d5e0cb146bafa48
SHA256 5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c
SHA512 53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

MD5 fd98baf5a9c30d41317663898985593b
SHA1 ea300b99f723d2429d75a6c40e0838bf60f17aad
SHA256 9d97a5bbc88fdcceac25f293383f7e5ce242675460ffbfb2ee9090870c034e96
SHA512 bf4dbbd671b5d7afb326622a7c781f150860294d3dba7160330046c258c84a15981c70e50d84dc7faaa7cc8b8c90bf8df818b3f2d3806a8a3671dfe5e38fe7b0

C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

MD5 7700b2fae0c5948c0e07afce34b1a887
SHA1 523d19100e6faa24be6679589455c1f41de526d2
SHA256 979c4b6558256aeb5e60c1490684b1defcef863c06f6625c7c454799045d9423
SHA512 bf138022244186a2407e3acda80f71bc712d08faa474d6a5c15eab490194d18b0a442ef4c2cdb0b6f07cce0f3e1932682ad895f3d151779e05e2836961220684

memory/4708-67-0x00007FF98E8C3000-0x00007FF98E8C5000-memory.dmp

memory/4708-68-0x00007FF98E8C0000-0x00007FF98F381000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Client.exe.log

MD5 2ff39f6c7249774be85fd60a8f9a245e
SHA1 684ff36b31aedc1e587c8496c02722c6698c1c4e
SHA256 e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced
SHA512 1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1