xworm | a85ae2633f7af6b455122f6a67b9540f97458f969dddef41957412c877717cb4

General

Target

XClient.exe
Size

65KB
MD5

8617f1ab9fdd3fdf84eea078439f72c7
SHA1

998b0f01504bbd9b3055553f87a70240a68827fc
SHA256

a85ae2633f7af6b455122f6a67b9540f97458f969dddef41957412c877717cb4
SHA512

a6e8adf148fe60a26eb8cf46afe8e455936a648b662dd31b9aaf86d057f9d7943509e98e3763079d5cf12948da48dee3be2c588b6816b2054e0044055943ed5c
SSDEEP

1536:q224eK/Zxf/waUj9bw+bJcIBKLhcDn66RBWOUuR2jg:324eK/Zxf4aUB8+bJcIkhemOUuReg

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

C2

5.tcp.eu.ngrok.io:7771

Attributes

install_file
USB.exe

Signatures

Detect Xworm Payload 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/4552-1-0x0000000000770000-0x0000000000786000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
execution

PowerShell
T1059.001

Processes:

powershell.exepowershell.exe

pid process

4208 powershell.exe
4236 powershell.exe
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.

Query Registry
T1012

System Information Discovery
T1082

Processes:

XClient.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation XClient.exe
Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service
T1102

Processes:

flow ioc

15 5.tcp.eu.ngrok.io
39 5.tcp.eu.ngrok.io
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

powershell.exepowershell.exeXClient.exe

pid process

4208 powershell.exe
4208 powershell.exe
4236 powershell.exe
4236 powershell.exe
4552 XClient.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

XClient.exepowershell.exepowershell.exe

description pid process

Token: SeDebugPrivilege 4552 XClient.exe
Token: SeDebugPrivilege 4208 powershell.exe
Token: SeDebugPrivilege 4236 powershell.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

XClient.exe

pid process

4552 XClient.exe

pid	process
4208	powershell.exe
4236	powershell.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation	XClient.exe

flow	ioc
15	5.tcp.eu.ngrok.io
39	5.tcp.eu.ngrok.io

pid	process
4208	powershell.exe
4208	powershell.exe
4236	powershell.exe
4236	powershell.exe
4552	XClient.exe

description	pid	process
Token: SeDebugPrivilege	4552	XClient.exe
Token: SeDebugPrivilege	4208	powershell.exe
Token: SeDebugPrivilege	4236	powershell.exe

pid	process
4552	XClient.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

XClient.exe

description	pid	process	target process
PID 4552 wrote to memory of 4208	4552	XClient.exe	powershell.exe
PID 4552 wrote to memory of 4208	4552	XClient.exe	powershell.exe
PID 4552 wrote to memory of 4236	4552	XClient.exe	powershell.exe
PID 4552 wrote to memory of 4236	4552	XClient.exe	powershell.exe

C:\Users\Admin\AppData\Local\Temp\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4552

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\XClient.exe'
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4208

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4236

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Web Service

1

T1102

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
944B

MD5
62623d22bd9e037191765d5083ce16a3

SHA1
4a07da6872672f715a4780513d95ed8ddeefd259

SHA256
95d79fd575bbd21540e378fcbc1cd00d16f51af62ce15bae7080bb72c24e2010

SHA512
9a448b7a0d867466c2ea04ab84d2a9485d5fd20ab53b2b854f491831ee3f1d781b94d2635f7b0b35cb9f2d373cd52c67570879a56a42ed66bc9db06962ed4992

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ghi5sfua.1rf.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/4208-11-0x00000230E92B0000-0x00000230E92D2000-memory.dmp

Filesize
136KB

Download
memory/4208-12-0x00007FFA35930000-0x00007FFA363F1000-memory.dmp

Filesize
10.8MB

Download
memory/4208-13-0x00007FFA35930000-0x00007FFA363F1000-memory.dmp

Filesize
10.8MB

Download
memory/4208-14-0x00007FFA35930000-0x00007FFA363F1000-memory.dmp

Filesize
10.8MB

Download
memory/4208-17-0x00007FFA35930000-0x00007FFA363F1000-memory.dmp

Filesize
10.8MB

Download
memory/4552-0-0x00007FFA35933000-0x00007FFA35935000-memory.dmp

Filesize
8KB

Download
memory/4552-1-0x0000000000770000-0x0000000000786000-memory.dmp

Filesize
88KB

Download
memory/4552-30-0x00007FFA35930000-0x00007FFA363F1000-memory.dmp

Filesize
10.8MB

Download
memory/4552-31-0x00007FFA35933000-0x00007FFA35935000-memory.dmp

Filesize
8KB

Download
memory/4552-32-0x00007FFA35930000-0x00007FFA363F1000-memory.dmp

Filesize
10.8MB

Download

Analysis

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