xworm | c150b18ea2bd00902f2b8de9b0439ef6bd2a448b3255ac4619bab7de57407ea3

General

Target

XClient.exe
Size

41KB
MD5

486527e2986049735316f190c8571c72
SHA1

9ce5e9ae89d3b91c834ac66d5ab947687b867c19
SHA256

c150b18ea2bd00902f2b8de9b0439ef6bd2a448b3255ac4619bab7de57407ea3
SHA512

01ed720a7100238bb51e1fa6ebe88e62a3fa6c3060c472891c38b0cfc17e29d4f11899a0dd12d3460473f751af299a5e5c87e97a2a75b0c7e911b5797f13c745
SSDEEP

768:bG2ZOWZ42nxuT3XvgggCLJF5PG9pmWJ6vOwhX3Emz9:bG2bZ42n07XvvgcFI9AWJ6vOwV9Z

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

ikonik2681-35277.portmap.host:35277

Mutex

NwRz6E7beRbMfRwa

Attributes

Install_directory
%AppData%
install_file
$77MicrosoftDefender.exe

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/5856-1-0x0000000000680000-0x0000000000690000-memory.dmp	family_xworm
behavioral2/files/0x001e00000002ab86-57.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
6000	powershell.exe
5204	powershell.exe
2332	powershell.exe
6048	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$77MicrosoftDefender.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$77MicrosoftDefender.lnk	XClient.exe

Executes dropped EXE 3 IoCs

pid	Process
2188	$77MicrosoftDefender.exe
5420	$77MicrosoftDefender.exe
2796	$77MicrosoftDefender.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-1-5-21-3870231897-2573482396-1083937135-1000\Software\Microsoft\Windows\CurrentVersion\Run\$77MicrosoftDefender = "C:\\Users\\Admin\\AppData\\Roaming\\$77MicrosoftDefender.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
1	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
2860	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
6000	powershell.exe
6000	powershell.exe
5204	powershell.exe
5204	powershell.exe
2332	powershell.exe
2332	powershell.exe
6048	powershell.exe
6048	powershell.exe
5856	XClient.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	5856	XClient.exe
Token: SeDebugPrivilege	6000	powershell.exe
Token: SeDebugPrivilege	5204	powershell.exe
Token: SeDebugPrivilege	2332	powershell.exe
Token: SeDebugPrivilege	6048	powershell.exe
Token: SeDebugPrivilege	5856	XClient.exe
Token: SeDebugPrivilege	2188	$77MicrosoftDefender.exe
Token: SeDebugPrivilege	5420	$77MicrosoftDefender.exe
Token: SeDebugPrivilege	2796	$77MicrosoftDefender.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5856	XClient.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 5856 wrote to memory of 6000	5856	XClient.exe	79
PID 5856 wrote to memory of 6000	5856	XClient.exe	79
PID 5856 wrote to memory of 5204	5856	XClient.exe	81
PID 5856 wrote to memory of 5204	5856	XClient.exe	81
PID 5856 wrote to memory of 2332	5856	XClient.exe	83
PID 5856 wrote to memory of 2332	5856	XClient.exe	83
PID 5856 wrote to memory of 6048	5856	XClient.exe	85
PID 5856 wrote to memory of 6048	5856	XClient.exe	85
PID 5856 wrote to memory of 2860	5856	XClient.exe	87
PID 5856 wrote to memory of 2860	5856	XClient.exe	87

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⤵
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5856
- 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:6000
- 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:5204
- 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\$77MicrosoftDefender.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2332
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '$77MicrosoftDefender.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:6048
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "$77MicrosoftDefender" /tr "C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2860

C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe
C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2188

C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe
C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:5420

C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe
C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2796

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

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\$77MicrosoftDefender.exe.log

Filesize
654B

MD5
2cbbb74b7da1f720b48ed31085cbd5b8

SHA1
79caa9a3ea8abe1b9c4326c3633da64a5f724964

SHA256
e31b18f21621d9983bfdf1ea3e53884a9d58b8ffd79e0e5790da6f3a81a8b9d3

SHA512
ecf02d5240e0c1c005d3ab393aa7eff62bd498c2db5905157e2bf6d29e1b663228a9583950842629d1a4caef404c8941a0c7799b1a3bd1eb890a09fdb7efcff9

Download Submit
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\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
80b42fe4c6cf64624e6c31e5d7f2d3b3

SHA1
1f93e7dd83b86cb900810b7e3e43797868bf7d93

SHA256
ee20a5b38a6674366efda276dbbf0b43eb54efd282acfc1033042f6b53a80d4d

SHA512
83c1c744c15a8b427a1d3af677ec3bfd0353875a60fe886c41570981e17467ebbb59619b960ca8c5c3ab1430946b0633ea200b7e7d84ab6dca88b60c50055573

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_q4upe0op.qi5.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe

Filesize
41KB

MD5
486527e2986049735316f190c8571c72

SHA1
9ce5e9ae89d3b91c834ac66d5ab947687b867c19

SHA256
c150b18ea2bd00902f2b8de9b0439ef6bd2a448b3255ac4619bab7de57407ea3

SHA512
01ed720a7100238bb51e1fa6ebe88e62a3fa6c3060c472891c38b0cfc17e29d4f11899a0dd12d3460473f751af299a5e5c87e97a2a75b0c7e911b5797f13c745

Download Submit
memory/5856-1-0x0000000000680000-0x0000000000690000-memory.dmp

Filesize
64KB

Download
memory/5856-2-0x00007FFFB4830000-0x00007FFFB52F2000-memory.dmp

Filesize
10.8MB

Download
memory/5856-0-0x00007FFFB4833000-0x00007FFFB4835000-memory.dmp

Filesize
8KB

Download
memory/5856-56-0x00007FFFB4830000-0x00007FFFB52F2000-memory.dmp

Filesize
10.8MB

Download
memory/5856-51-0x00007FFFB4833000-0x00007FFFB4835000-memory.dmp

Filesize
8KB

Download
memory/6000-12-0x000002BFEE600000-0x000002BFEE622000-memory.dmp

Filesize
136KB

Download
memory/6000-19-0x00007FFFB4830000-0x00007FFFB52F2000-memory.dmp

Filesize
10.8MB

Download
memory/6000-16-0x00007FFFB4830000-0x00007FFFB52F2000-memory.dmp

Filesize
10.8MB

Download
memory/6000-15-0x00007FFFB4830000-0x00007FFFB52F2000-memory.dmp

Filesize
10.8MB

Download
memory/6000-14-0x00007FFFB4830000-0x00007FFFB52F2000-memory.dmp

Filesize
10.8MB

Download
memory/6000-13-0x00007FFFB4830000-0x00007FFFB52F2000-memory.dmp

Filesize
10.8MB

Download
memory/6000-3-0x00007FFFB4830000-0x00007FFFB52F2000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads