xworm | 39d928ef59af8f60ad6ff7dc973cc3d00e3f6751d5fd3824c615c311b0a14da0

General

Target

svchost.exe
Size

83KB
MD5

cf73759724ceaffa0353900bd428a555
SHA1

a62a68b7a2c0db839f05a763a9c5bda7b92f4709
SHA256

39d928ef59af8f60ad6ff7dc973cc3d00e3f6751d5fd3824c615c311b0a14da0
SHA512

d6340601e1a3ebda121390d55a3f2fbb6a1fd38e8fb51115823377f72087ef17409eafe41c182736c20b70ce25fabc1f83750112804b981c34d791c69e403e11
SSDEEP

1536:1n0eV0hQr7Xfc5z6AKlNwDSYyWzgbDHFoX2Nb9yB7j6M+pHaOJpyW:9CMfc8WyYgbDloGNba7LeaOJpD

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%AppData%
install_file
svchost.exe
pastebin_url
https://pastebin.com/raw/mDSLGN9q
telegram
https://api.telegram.org/bot7168105056:AAGVK3B7ZFupxq4PpmnBpxAQOwJ5CUp76ow/sendMessage?chat_id=1992635040

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/1928-1-0x0000000000E20000-0x0000000000E3C000-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 4 IoCs

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

execution

PowerShell

T1059.001

pid	Process
2016	powershell.exe
5020	powershell.exe
1592	powershell.exe
352	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	svchost.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-1-5-21-2410826464-2353372766-2364966905-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe"	svchost.exe

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

Web Service

T1102

flow	ioc
1	pastebin.com
4	pastebin.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

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
4928	schtasks.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2016	powershell.exe
2016	powershell.exe
5020	powershell.exe
5020	powershell.exe
1592	powershell.exe
1592	powershell.exe
352	powershell.exe
352	powershell.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	1928	svchost.exe
Token: SeDebugPrivilege	2016	powershell.exe
Token: SeDebugPrivilege	5020	powershell.exe
Token: SeDebugPrivilege	1592	powershell.exe
Token: SeDebugPrivilege	352	powershell.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1928 wrote to memory of 2016	1928	svchost.exe	81
PID 1928 wrote to memory of 2016	1928	svchost.exe	81
PID 1928 wrote to memory of 5020	1928	svchost.exe	83
PID 1928 wrote to memory of 5020	1928	svchost.exe	83
PID 1928 wrote to memory of 1592	1928	svchost.exe	85
PID 1928 wrote to memory of 1592	1928	svchost.exe	85
PID 1928 wrote to memory of 352	1928	svchost.exe	87
PID 1928 wrote to memory of 352	1928	svchost.exe	87
PID 1928 wrote to memory of 4928	1928	svchost.exe	89
PID 1928 wrote to memory of 4928	1928	svchost.exe	89

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\svchost.exe
"C:\Users\Admin\AppData\Local\Temp\svchost.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1928
- 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\svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2016
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5020
- 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\svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1592
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:352
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\Users\Admin\AppData\Roaming\svchost.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4928

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

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\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
9fdb1858d20e65d98e557e6e579c63b6

SHA1
9c1b0b266cc73d6ffb00929095c038dab8a82a70

SHA256
901e9d5b68788efbbd1e15881a02d15a41e6ac5a6fc6afd9ac43d548eeb77330

SHA512
0b0d70c992efcfe8155caffdc93390b91e043f356efb7c1b925036cff65a94e7d0bf529f4cd89c747196eaf3524c840358cc656031dea5f250fbf57d269caaf1

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

Filesize
944B

MD5
00bd36561a6192618b0c5122b6ebf557

SHA1
f344b9534d0fe4740ef43d27d2f3e9b158672e60

SHA256
27a0a6f30a8f916248ba5e7cc3d67c114c3c4a2543ab223b313707876fc85fa6

SHA512
9b56e61ff6187cb7d4d4509377a629707598d200939f53c9e9641a32133c180d62d81adef68ce7c28421321e5368930a9bc328770102b1c00480f41dffd486ff

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ovhahfgq.4os.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1928-1-0x0000000000E20000-0x0000000000E3C000-memory.dmp

Filesize
112KB

Download
memory/1928-39-0x00007FF86C8B3000-0x00007FF86C8B5000-memory.dmp

Filesize
8KB

Download
memory/1928-0-0x00007FF86C8B3000-0x00007FF86C8B5000-memory.dmp

Filesize
8KB

Download
memory/2016-13-0x00007FF86C8B0000-0x00007FF86D372000-memory.dmp

Filesize
10.8MB

Download
memory/2016-18-0x00007FF86C8B0000-0x00007FF86D372000-memory.dmp

Filesize
10.8MB

Download
memory/2016-15-0x00007FF86C8B0000-0x00007FF86D372000-memory.dmp

Filesize
10.8MB

Download
memory/2016-14-0x00007FF86C8B0000-0x00007FF86D372000-memory.dmp

Filesize
10.8MB

Download
memory/2016-12-0x00007FF86C8B0000-0x00007FF86D372000-memory.dmp

Filesize
10.8MB

Download
memory/2016-11-0x00000154AB5B0000-0x00000154AB5D2000-memory.dmp

Filesize
136KB

Download
memory/2016-10-0x00007FF86C8B0000-0x00007FF86D372000-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