xworm | b6253c0d16bb1f326958003cf456382dcb1876f4519519b6b39676ee369ac2fb

General

Target

tool.exe
Size

262KB
MD5

3a5caf979b458f716a670e49ee8c4cca
SHA1

80f20a21284752096e93d0a99a243e1cbca7d458
SHA256

b6253c0d16bb1f326958003cf456382dcb1876f4519519b6b39676ee369ac2fb
SHA512

e00a5f7753f6055766028fe38f780d04c02b74d6852c0e6b684001740d3d942349ec03d7fdf32af543f2b2cc1f8b241dcb87e3b52dcdfcfa3a08f96f69bddb81
SSDEEP

6144:ilejaU5gt8SYDRmGWp8Vu2PD9+W5reXsC24SC:pjh5SY1mGWpw995iT24S

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

C2

147.185.221.25:58680

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/4548-36-0x0000000001580000-0x0000000001598000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
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

pid	Process
4956	powershell.exe
1968	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	taskhostw.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	taskhostw.exe

Executes dropped EXE 1 IoCs

pid	Process
4548	taskhostw.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
1	discord.com
3	discord.com

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
1	ip-api.com

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
4956	powershell.exe
4956	powershell.exe
1968	powershell.exe
1968	powershell.exe
4548	taskhostw.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	952	tool.exe
Token: SeDebugPrivilege	4956	powershell.exe
Token: SeDebugPrivilege	1968	powershell.exe
Token: SeDebugPrivilege	4548	taskhostw.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4548	taskhostw.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 952 wrote to memory of 4956	952	tool.exe	83
PID 952 wrote to memory of 4956	952	tool.exe	83
PID 952 wrote to memory of 1968	952	tool.exe	85
PID 952 wrote to memory of 1968	952	tool.exe	85

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\tool.exe
"C:\Users\Admin\AppData\Local\Temp\tool.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:952
- 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\Roaming\taskhostw.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4956
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'taskhostw.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1968

C:\Users\Admin\AppData\Roaming\taskhostw.exe
C:\Users\Admin\AppData\Roaming\taskhostw.exe
1⤵
- Drops startup file
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:4548

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

1

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

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

Filesize
2KB

MD5
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

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

Filesize
944B

MD5
1a9fa92a4f2e2ec9e244d43a6a4f8fb9

SHA1
9910190edfaccece1dfcc1d92e357772f5dae8f7

SHA256
0ee052d5333fd5fd86bc84856fec98e045f077a7ac8051651bf7c521b9706888

SHA512
5d2361476fa22200e6f83883efe7dcb8c3fe7dae8d56e04e28a36e9ae1270c327b6aa161d92b239593da7661289d002c574446ecfd6bd19928209aae25e3ef64

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_grpdn1w3.eql.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\taskhostw.exe

Filesize
262KB

MD5
3a5caf979b458f716a670e49ee8c4cca

SHA1
80f20a21284752096e93d0a99a243e1cbca7d458

SHA256
b6253c0d16bb1f326958003cf456382dcb1876f4519519b6b39676ee369ac2fb

SHA512
e00a5f7753f6055766028fe38f780d04c02b74d6852c0e6b684001740d3d942349ec03d7fdf32af543f2b2cc1f8b241dcb87e3b52dcdfcfa3a08f96f69bddb81

Download Submit
memory/952-1-0x00000000001D0000-0x0000000000218000-memory.dmp

Filesize
288KB

Download
memory/952-2-0x00007FF93BCB0000-0x00007FF93C772000-memory.dmp

Filesize
10.8MB

Download
memory/952-35-0x00007FF93BCB0000-0x00007FF93C772000-memory.dmp

Filesize
10.8MB

Download
memory/952-0-0x00007FF93BCB3000-0x00007FF93BCB5000-memory.dmp

Filesize
8KB

Download
memory/4548-36-0x0000000001580000-0x0000000001598000-memory.dmp

Filesize
96KB

Download
memory/4956-13-0x00007FF93BCB0000-0x00007FF93C772000-memory.dmp

Filesize
10.8MB

Download
memory/4956-18-0x00007FF93BCB0000-0x00007FF93C772000-memory.dmp

Filesize
10.8MB

Download
memory/4956-15-0x00007FF93BCB0000-0x00007FF93C772000-memory.dmp

Filesize
10.8MB

Download
memory/4956-14-0x00007FF93BCB0000-0x00007FF93C772000-memory.dmp

Filesize
10.8MB

Download
memory/4956-8-0x0000028DA2190000-0x0000028DA21B2000-memory.dmp

Filesize
136KB

Download
memory/4956-9-0x00007FF93BCB0000-0x00007FF93C772000-memory.dmp

Filesize
10.8MB

Download

Analysis

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