xworm | aa3dabbac106353d10a29feef610256139771ae6bd70c86204623fc827dcb659

General

Target

vlz.exe
Size

335KB
MD5

1c3d5b401cebef06499718e000aa6c2b
SHA1

2f337e0fe1562aea14c4256afd47bce049e79f3c
SHA256

aa3dabbac106353d10a29feef610256139771ae6bd70c86204623fc827dcb659
SHA512

f7d069f73b7b423123352ce100668608ae430151ceeddc0df542508b93ce7c4c3310bda4e8488888d9f425dfd26c0db4bd8070f0128697d23ffd44fdfdb42093
SSDEEP

6144:vWQLUqb9Bh+GIIIIIIIhIIIIIIIIIIIIIIIU:XLHBa

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

its-definitely.gl.at.ply.gg:32735

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/4456-1-0x00000000000F0000-0x000000000014A000-memory.dmp	family_xworm
behavioral2/files/0x000e000000023b9d-59.dat	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 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2588	powershell.exe
4900	powershell.exe
4024	powershell.exe
372	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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	vlz.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
4036	XClient.exe
4960	XClient.exe
1472	XClient.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	vlz.exe

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
15	ip-api.com

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

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
4544	schtasks.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2588	powershell.exe
2588	powershell.exe
4900	powershell.exe
4900	powershell.exe
4024	powershell.exe
4024	powershell.exe
372	powershell.exe
372	powershell.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	4456	vlz.exe
Token: SeDebugPrivilege	2588	powershell.exe
Token: SeDebugPrivilege	4900	powershell.exe
Token: SeDebugPrivilege	4024	powershell.exe
Token: SeDebugPrivilege	372	powershell.exe
Token: SeDebugPrivilege	4456	vlz.exe
Token: SeDebugPrivilege	4036	XClient.exe
Token: SeDebugPrivilege	4960	XClient.exe
Token: SeDebugPrivilege	1472	XClient.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4456 wrote to memory of 2588	4456	vlz.exe	83
PID 4456 wrote to memory of 2588	4456	vlz.exe	83
PID 4456 wrote to memory of 4900	4456	vlz.exe	87
PID 4456 wrote to memory of 4900	4456	vlz.exe	87
PID 4456 wrote to memory of 4024	4456	vlz.exe	90
PID 4456 wrote to memory of 4024	4456	vlz.exe	90
PID 4456 wrote to memory of 372	4456	vlz.exe	92
PID 4456 wrote to memory of 372	4456	vlz.exe	92
PID 4456 wrote to memory of 4544	4456	vlz.exe	94
PID 4456 wrote to memory of 4544	4456	vlz.exe	94

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\vlz.exe
"C:\Users\Admin\AppData\Local\Temp\vlz.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4456
- 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\vlz.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2588
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'vlz.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4900
- 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\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4024
- 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:372
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Roaming\XClient.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4544

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4036

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4960

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1472

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
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
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

Filesize
944B

MD5
37a924b11cf3f7f57fc56898abe9b0e6

SHA1
5ee379727611f74dc5fa677b65881d4c63e10f95

SHA256
6e7f7c5fddb3a0300740fdcbe1a8ec3a0be0f16dff193f9806364a19262b52bf

SHA512
903e1badb3577e0b3e92b69491596c9a402b51cdf3de43d5fb06b08c5689d2ff7ba25f8d1497d6527e943d9063a7ee79cbf2b47892de1de3b68cc7ca77853d6f

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

Filesize
944B

MD5
22310ad6749d8cc38284aa616efcd100

SHA1
440ef4a0a53bfa7c83fe84326a1dff4326dcb515

SHA256
55b1d8021c4eb4c3c0d75e3ed7a4eb30cd0123e3d69f32eeb596fe4ffec05abf

SHA512
2ef08e2ee15bb86695fe0c10533014ffed76ececc6e579d299d3365fafb7627f53e32e600bb6d872b9f58aca94f8cb7e1e94cdfd14777527f7f0aa019d9c6def

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_aga5h4e3.tmq.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
335KB

MD5
1c3d5b401cebef06499718e000aa6c2b

SHA1
2f337e0fe1562aea14c4256afd47bce049e79f3c

SHA256
aa3dabbac106353d10a29feef610256139771ae6bd70c86204623fc827dcb659

SHA512
f7d069f73b7b423123352ce100668608ae430151ceeddc0df542508b93ce7c4c3310bda4e8488888d9f425dfd26c0db4bd8070f0128697d23ffd44fdfdb42093

Download Submit
memory/2588-4-0x0000024F23570000-0x0000024F23592000-memory.dmp

Filesize
136KB

Download
memory/2588-18-0x00007FFD9A550000-0x00007FFD9B011000-memory.dmp

Filesize
10.8MB

Download
memory/2588-11-0x00007FFD9A550000-0x00007FFD9B011000-memory.dmp

Filesize
10.8MB

Download
memory/2588-5-0x00007FFD9A550000-0x00007FFD9B011000-memory.dmp

Filesize
10.8MB

Download
memory/2588-3-0x00007FFD9A550000-0x00007FFD9B011000-memory.dmp

Filesize
10.8MB

Download
memory/4456-0-0x00007FFD9A553000-0x00007FFD9A555000-memory.dmp

Filesize
8KB

Download
memory/4456-53-0x00007FFD9A553000-0x00007FFD9A555000-memory.dmp

Filesize
8KB

Download
memory/4456-58-0x00007FFD9A550000-0x00007FFD9B011000-memory.dmp

Filesize
10.8MB

Download
memory/4456-2-0x00007FFD9A550000-0x00007FFD9B011000-memory.dmp

Filesize
10.8MB

Download
memory/4456-1-0x00000000000F0000-0x000000000014A000-memory.dmp

Filesize
360KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads