xworm | e1480985f20d0d0e34970f2e3cb53de25916914fe4a3c64e623c20d5761412dd

General

Target

XClient.exe
Size

63KB
MD5

c2058bfb9380ae354b33da22fe97e02b
SHA1

4b5fa6ec3a8516bd53e3c9f621fa87e29f3cc093
SHA256

e1480985f20d0d0e34970f2e3cb53de25916914fe4a3c64e623c20d5761412dd
SHA512

b04669a8a227b269401dfa71c7cce9b4f68906c69a758a951b383c6de6ff363cde0299850ead2401004ef6c4f2ef918096efb909472397dac7895c8fd4df5d82
SSDEEP

1536:Q4ckojUwW22txOzlp0yDb+YqdJBGcf6yJJbiOhk4lW:QfvUwWJIb+LHBTBJQOhtlW

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

C2

https://pastebin.com/J9pCmv2b:123456789

Attributes

Install_directory
%AppData%
install_file
svchost.exe
pastebin_url
https://pastebin.com/J9pCmv2b

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/4128-1-0x0000000000080000-0x0000000000096000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat 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
60	powershell.exe
2024	powershell.exe
4200	powershell.exe
4016	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-1-5-21-4204450073-1267028356-951339405-1000\Control Panel\International\Geo\Nation	XClient.exe

Drops startup file 2 IoCs

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

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

Web Service

T1102

flow	ioc
20	pastebin.com
21	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
17	ip-api.com

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2024	powershell.exe
2024	powershell.exe
4200	powershell.exe
4200	powershell.exe
4016	powershell.exe
4016	powershell.exe
60	powershell.exe
60	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	4128	XClient.exe
Token: SeDebugPrivilege	2024	powershell.exe
Token: SeDebugPrivilege	4200	powershell.exe
Token: SeDebugPrivilege	4016	powershell.exe
Token: SeDebugPrivilege	60	powershell.exe
Token: SeDebugPrivilege	4128	XClient.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4128 wrote to memory of 2024	4128	XClient.exe	89
PID 4128 wrote to memory of 2024	4128	XClient.exe	89
PID 4128 wrote to memory of 4200	4128	XClient.exe	91
PID 4128 wrote to memory of 4200	4128	XClient.exe	91
PID 4128 wrote to memory of 4016	4128	XClient.exe	93
PID 4128 wrote to memory of 4016	4128	XClient.exe	93
PID 4128 wrote to memory of 60	4128	XClient.exe	95
PID 4128 wrote to memory of 60	4128	XClient.exe	95

C:\Users\Admin\AppData\Local\Temp\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4128
- 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:2024
- 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:4200
- 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:4016
- 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:60

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

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
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
944B

MD5
51cf8df21f531e31f7740b4ec487a48a

SHA1
40c6a73b22d71625a62df109aefc92a5f9b9d13e

SHA256
263d9b98a897d1d66da4832af640c4bf5ab0ae91125ba12243453dfe714f3d0d

SHA512
57a85461f6ea96b26a8b53d3a9cca18543e4ddbe996e8f412fc4cf7cf6e9ffe558c96da7b322a42f18bef62020e65aee119bed6102f75e2f605df09b02ec6368

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

Filesize
944B

MD5
e58749a7a1826f6ea62df1e2ef63a32b

SHA1
c0bca21658b8be4f37b71eec9578bfefa44f862d

SHA256
0e1f0e684adb40a5d0668df5fed007c9046137d7ae16a1f2f343b139d5f9bc93

SHA512
4cf45b2b11ab31e7f67fff286b29d50ed28cd6043091144c5c0f1348b5f5916ed7479cf985595e6f096b586ab93b4b5dce612f688049b8366a2dd91863e98b70

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_koge4avf.ju0.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2024-5-0x00000231E8040000-0x00000231E8062000-memory.dmp

Filesize
136KB

Download
memory/2024-15-0x00007FFCAC8A0000-0x00007FFCAD361000-memory.dmp

Filesize
10.8MB

Download
memory/2024-18-0x00007FFCAC8A0000-0x00007FFCAD361000-memory.dmp

Filesize
10.8MB

Download
memory/2024-4-0x00007FFCAC8A0000-0x00007FFCAD361000-memory.dmp

Filesize
10.8MB

Download
memory/2024-3-0x00007FFCAC8A0000-0x00007FFCAD361000-memory.dmp

Filesize
10.8MB

Download
memory/4128-0-0x00007FFCAC8A3000-0x00007FFCAC8A5000-memory.dmp

Filesize
8KB

Download
memory/4128-2-0x00007FFCAC8A0000-0x00007FFCAD361000-memory.dmp

Filesize
10.8MB

Download
memory/4128-1-0x0000000000080000-0x0000000000096000-memory.dmp

Filesize
88KB

Download
memory/4128-57-0x00007FFCAC8A3000-0x00007FFCAC8A5000-memory.dmp

Filesize
8KB

Download
memory/4128-58-0x00007FFCAC8A0000-0x00007FFCAD361000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing