xworm | c54430b097c3220bf89dceac9e0e4ecfa6ab95302b30830e0c4f0aa64d617267

General

Target

XClient.exe
Size

61KB
MD5

654a9a23f94cdcfe31cdd98cd7e9dd1f
SHA1

3e7fab38617cce17abc79b5c87fbdd9597940cda
SHA256

c54430b097c3220bf89dceac9e0e4ecfa6ab95302b30830e0c4f0aa64d617267
SHA512

e75b67e6b907c58a5f55a308618ba7311114da347c0d48ff8a7304986348115d917d654e65a81903ef82d005ee548e43e35b74b78c3de54fe7e17d32ac20a87c
SSDEEP

1536:cfBPd1ylaxTobN2bN4R1DL66Z/TpYOR/P3:cf1ylsYgbNwlVT+ORn3

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

WNIKO1-39869.portmap.host:39869

Attributes

install_file
USB.exe

Signatures

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

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-1-5-21-1498570331-2313266200-788959944-1000\Control Panel\International\Geo\Nation	XClient.exe

Drops startup file 2 IoCs

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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Local\\XClient.exe"	XClient.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
9	ip-api.com

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

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

persistence

Scheduled Task

T1053

pid	Process
4520	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2184	powershell.exe
2184	powershell.exe
3236	powershell.exe
3236	powershell.exe
2972	powershell.exe
2972	powershell.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	4568	XClient.exe
Token: SeDebugPrivilege	2184	powershell.exe
Token: SeDebugPrivilege	3236	powershell.exe
Token: SeDebugPrivilege	2972	powershell.exe
Token: SeDebugPrivilege	4568	XClient.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4568 wrote to memory of 2184	4568	XClient.exe	85
PID 4568 wrote to memory of 2184	4568	XClient.exe	85
PID 4568 wrote to memory of 3236	4568	XClient.exe	87
PID 4568 wrote to memory of 3236	4568	XClient.exe	87
PID 4568 wrote to memory of 2972	4568	XClient.exe	89
PID 4568 wrote to memory of 2972	4568	XClient.exe	89
PID 4568 wrote to memory of 4520	4568	XClient.exe	91
PID 4568 wrote to memory of 4520	4568	XClient.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:\Users\Admin\AppData\Local\Temp\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4568
- 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⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2184
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3236
- 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\XClient.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2972
- 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\Local\XClient.exe"
  2⤵
  - Creates scheduled task(s)
  PID:4520

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Registry Run Keys / Startup Folder

Scheduled Task

Privilege Escalation

Scheduled Task

1

T1053

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\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
59d97011e091004eaffb9816aa0b9abd

SHA1
1602a56b01dd4b7c577ca27d3117e4bcc1aa657b

SHA256
18f381e0db020a763b8c515c346ef58679ab9c403267eacfef5359e272f7e71d

SHA512
d9ca49c1a17580981e2c1a50d73c0eecaa7a62f8514741512172e395af2a3d80aeb0f71c58bc7f52c18246d57ba67af09b6bff4776877d6cc6f0245c30e092d6

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

Filesize
944B

MD5
8c8dac626a173014cf7951b9ddfd9a8f

SHA1
526c3bbee604116a9c0deceab407caec34f3d552

SHA256
8e4a00f2a4f734671e00233e626fc950da4f58240f3729470ef592fa00a454a9

SHA512
4a1705b19c25c6238c204d7793a1f550e53b14ecb2aae82c32a2dca3d4110f737275cbdfd3ce65db95caf84eeac506d20ece28c96c9114eb0c61e58467471474

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_pffwljwo.zs1.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
61KB

MD5
654a9a23f94cdcfe31cdd98cd7e9dd1f

SHA1
3e7fab38617cce17abc79b5c87fbdd9597940cda

SHA256
c54430b097c3220bf89dceac9e0e4ecfa6ab95302b30830e0c4f0aa64d617267

SHA512
e75b67e6b907c58a5f55a308618ba7311114da347c0d48ff8a7304986348115d917d654e65a81903ef82d005ee548e43e35b74b78c3de54fe7e17d32ac20a87c

Download Submit
memory/2184-145-0x0000013D31640000-0x0000013D31650000-memory.dmp

Filesize
64KB

Download
memory/2184-146-0x0000013D31640000-0x0000013D31650000-memory.dmp

Filesize
64KB

Download
memory/2184-147-0x0000013D31640000-0x0000013D31650000-memory.dmp

Filesize
64KB

Download
memory/2184-135-0x0000013D33070000-0x0000013D33092000-memory.dmp

Filesize
136KB

Download
memory/2972-175-0x00000282FEAD0000-0x00000282FEAE0000-memory.dmp

Filesize
64KB

Download
memory/2972-177-0x00000282FEAD0000-0x00000282FEAE0000-memory.dmp

Filesize
64KB

Download
memory/2972-176-0x00000282FEAD0000-0x00000282FEAE0000-memory.dmp

Filesize
64KB

Download
memory/3236-161-0x0000025269A30000-0x0000025269A40000-memory.dmp

Filesize
64KB

Download
memory/3236-163-0x0000025269A30000-0x0000025269A40000-memory.dmp

Filesize
64KB

Download
memory/3236-162-0x0000025269A30000-0x0000025269A40000-memory.dmp

Filesize
64KB

Download
memory/4568-133-0x0000000000200000-0x0000000000216000-memory.dmp

Filesize
88KB

Download
memory/4568-134-0x000000001AEF0000-0x000000001AF00000-memory.dmp

Filesize
64KB

Download
memory/4568-187-0x000000001AEF0000-0x000000001AF00000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads