xworm | d08fe746864d0cd1878ae16004cb6e598ccf59b15a36110daa1fbd870a86718d

General

Target

xdwd.exe
Size

80KB
MD5

3ade831c97437e1846fbf4916c3294cd
SHA1

54dbe45ba91a1a554c8cd807d2b55d50b4e8e4aa
SHA256

d08fe746864d0cd1878ae16004cb6e598ccf59b15a36110daa1fbd870a86718d
SHA512

7b684c6c4287bb5fdc5059a82b3599f13936417288cbb76cdbcfa100be4edac744790b8b364bc6184be3a34544d0df9c0b2ed7b61b7c5be0c36a4b3e91c9e5f7
SSDEEP

1536:mA8z0y19O6edHYBW8j6bZIW+MjM0aK6jOeuNDIEjh:mF39qd4b6b6Wg0OOeuyEN

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

3.1

Attributes

Install_directory
%LocalAppData%
install_file
USB.exe
pastebin_url
https://pastebin.com/raw/gf3CpGLZ

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/memory/2512-0-0x0000000000EF0000-0x0000000000F0A000-memory.dmp	family_xworm
behavioral1/files/0x000b00000001da42-48.dat	family_xworm

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

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

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

execution

PowerShell

T1059.001

pid	Process
1600	powershell.exe
4416	powershell.exe
1596	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-1-5-21-945322488-2060912225-3527527000-1000\Control Panel\International\Geo\Nation	xdwd.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xdwd.lnk	xdwd.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xdwd.lnk	xdwd.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-1-5-21-945322488-2060912225-3527527000-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\xdwd = "C:\\Users\\Admin\\AppData\\Local\\xdwd.exe"	xdwd.exe

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

Web Service

T1102

flow	ioc
18	pastebin.com
19	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
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
1992	schtasks.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
1600	powershell.exe
1600	powershell.exe
4416	powershell.exe
4416	powershell.exe
1596	powershell.exe
1596	powershell.exe
2512	xdwd.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2512	xdwd.exe
Token: SeDebugPrivilege	1600	powershell.exe
Token: SeDebugPrivilege	4416	powershell.exe
Token: SeDebugPrivilege	1596	powershell.exe
Token: SeDebugPrivilege	2512	xdwd.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2512	xdwd.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2512 wrote to memory of 1600	2512	xdwd.exe	87
PID 2512 wrote to memory of 1600	2512	xdwd.exe	87
PID 2512 wrote to memory of 4416	2512	xdwd.exe	89
PID 2512 wrote to memory of 4416	2512	xdwd.exe	89
PID 2512 wrote to memory of 1596	2512	xdwd.exe	91
PID 2512 wrote to memory of 1596	2512	xdwd.exe	91
PID 2512 wrote to memory of 1992	2512	xdwd.exe	93
PID 2512 wrote to memory of 1992	2512	xdwd.exe	93

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\xdwd.exe
"C:\Users\Admin\AppData\Local\Temp\xdwd.exe"
1⤵
- Checks computer location settings
- 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:2512
- 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\xdwd.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1600
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'xdwd.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4416
- 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\xdwd.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1596
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "xdwd" /tr "C:\Users\Admin\AppData\Local\xdwd.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1992

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

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
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

Filesize
944B

MD5
bd5940f08d0be56e65e5f2aaf47c538e

SHA1
d7e31b87866e5e383ab5499da64aba50f03e8443

SHA256
2d2f364c75bd2897504249f42cdf1d19374f5230aad68fa9154ea3d03e3031a6

SHA512
c34d10c7e07da44a180fae9889b61f08903aa84e8ddfa80c31c272b1ef9d491b8cec6b8a4c836c3cb1583fe8f4955c6a8db872515de3a9e10eae09610c959406

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

Filesize
944B

MD5
def02d9cbf3553624aa606226770e69c

SHA1
4c10b8d53a467654de7d22b9e96aee8f61ae2c86

SHA256
d89a0d362229fc3a7042031aec4175ecbe776d9baffed142d3f147dfa57bcd71

SHA512
0640e7fd9374de59908c510114f18354a777397b163a63341a2e6bd8ef00d826aba6ad657ccc172f0790e423ecbaf737a0fa4ff05a85477e5b9e72f80d35dce1

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_qkhlump4.xkq.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
80KB

MD5
3ade831c97437e1846fbf4916c3294cd

SHA1
54dbe45ba91a1a554c8cd807d2b55d50b4e8e4aa

SHA256
d08fe746864d0cd1878ae16004cb6e598ccf59b15a36110daa1fbd870a86718d

SHA512
7b684c6c4287bb5fdc5059a82b3599f13936417288cbb76cdbcfa100be4edac744790b8b364bc6184be3a34544d0df9c0b2ed7b61b7c5be0c36a4b3e91c9e5f7

Download Submit
memory/1600-9-0x00007FFE8FBC0000-0x00007FFE90681000-memory.dmp

Filesize
10.8MB

Download
memory/1600-13-0x000001A469120000-0x000001A469142000-memory.dmp

Filesize
136KB

Download
memory/1600-14-0x00007FFE8FBC0000-0x00007FFE90681000-memory.dmp

Filesize
10.8MB

Download
memory/1600-15-0x00007FFE8FBC0000-0x00007FFE90681000-memory.dmp

Filesize
10.8MB

Download
memory/1600-18-0x00007FFE8FBC0000-0x00007FFE90681000-memory.dmp

Filesize
10.8MB

Download
memory/2512-0-0x0000000000EF0000-0x0000000000F0A000-memory.dmp

Filesize
104KB

Download
memory/2512-2-0x00007FFE8FBC0000-0x00007FFE90681000-memory.dmp

Filesize
10.8MB

Download
memory/2512-1-0x00007FFE8FBC3000-0x00007FFE8FBC5000-memory.dmp

Filesize
8KB

Download
memory/2512-50-0x00007FFE8FBC3000-0x00007FFE8FBC5000-memory.dmp

Filesize
8KB

Download
memory/2512-51-0x00007FFE8FBC0000-0x00007FFE90681000-memory.dmp

Filesize
10.8MB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads