xworm | 3af6341374b1a0ed86398a390f45a915a8bbf0e458a20ef89a3d3ed411824473

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
submitted
14/06/2024, 06:22

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General

Target
XClient.exe
Size 70KB
Sample240614-g414essbmn
SHA256 3af6341374b1a0ed86398a390f45a915a8bbf0e458a20ef89a3d3ed411824473
MD5 7530579a1a8c47a968d51e77d7e1e8a5
SHA1 d4fc32c3c2dab4e4a7aa2b3c84275518d8690391
SHA512 75669316302ed49eedb805d4ae2b2ad096f9eb36b0d3f064e31c52541db18aa16dbea7877f1f35f1d37111a6ad66a2ca6fd8cc384646a07531acea9ec3f96dac
SSDEEP 1536:NZo8GJIFWhq4Oy+l+b4RngSj6jd3Og8SCqRaA1y:PMVOd+b4tgSGd3OFURLA
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%AppData%
install_file
XClient.exe
pastebin_url
https://pastebin.com/raw/YetBwjAF

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/1088-1-0x0000000000490000-0x00000000004A8000-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
2108	powershell.exe
2204	powershell.exe
4712	powershell.exe
3676	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\XClient.lnk	XClient.exe
File opened for modification	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

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4204450073-1267028356-951339405-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	XClient.exe

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

Web Service

T1102

flow	ioc
18	pastebin.com
19	pastebin.com

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2108	powershell.exe
2108	powershell.exe
2204	powershell.exe
2204	powershell.exe
4712	powershell.exe
4712	powershell.exe
3676	powershell.exe
3676	powershell.exe
1088	XClient.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	1088	XClient.exe
Token: SeDebugPrivilege	2108	powershell.exe
Token: SeDebugPrivilege	2204	powershell.exe
Token: SeDebugPrivilege	4712	powershell.exe
Token: SeDebugPrivilege	3676	powershell.exe
Token: SeDebugPrivilege	1088	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1088	XClient.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1088 wrote to memory of 2108	1088	XClient.exe	86
PID 1088 wrote to memory of 2108	1088	XClient.exe	86
PID 1088 wrote to memory of 2204	1088	XClient.exe	88
PID 1088 wrote to memory of 2204	1088	XClient.exe	88
PID 1088 wrote to memory of 4712	1088	XClient.exe	90
PID 1088 wrote to memory of 4712	1088	XClient.exe	90
PID 1088 wrote to memory of 3676	1088	XClient.exe	92
PID 1088 wrote to memory of 3676	1088	XClient.exe	92

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 behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1088
- 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:2108
- 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:2204
- 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\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4712
- 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:3676

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Size 2KB
SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
MD5 d85ba6ff808d9e5444a4b369f5bc2730
SHA1 31aa9d96590fff6981b315e0b391b575e4c0804a
SHA512 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb
MD5 77d622bb1a5b250869a3238b9bc1402b
SHA1 d47f4003c2554b9dfc4c16f22460b331886b191b
SHA512 d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 bd827af3192bf83c75a32e51ed2de83bd3b90d6b99350721a189a57cec15d063
MD5 eb033be02578f9635ec47bdc1de5c3fb
SHA1 ec356bc87381354a06baa9c30e8c3ac3d30e0f6f
SHA512 4d8778503646f7016df73ff9d204760f4fe4d2b24157920ac3e5651653373975b2f2d229530143059f11b16c42822ad7963e628ad6066022ee712c17d90595ed
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 cab7944d29e0501dc0db904ac460ca7a87700e0ec7eb62298b7b97cbf40c424c
MD5 dd1d0b083fedf44b482a028fb70b96e8
SHA1 dc9c027937c9f6d52268a1504cbae42a39c8d36a
SHA512 96bec38bfda176292ae65dcf735103e7888baa212038737c1d1e215fcb76e4c0355e4a827a1934303e7aecae91012fa412f13e38f382b732758bae985cc67973
MD5 SHA1 SHA512

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__PSScriptPolicyTest_i134s344.hta.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_i134s344.hta.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/1088-1-0x0000000000490000-0x00000000004A8000-memory.dmp

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memory/1088-59-0x00007FFFAE800000-0x00007FFFAF2C1000-memory.dmp

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memory/1088-0-0x00007FFFAE803000-0x00007FFFAE805000-memory.dmp

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memory/1088-58-0x00007FFFAE803000-0x00007FFFAE805000-memory.dmp

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memory/1088-57-0x00007FFFAE800000-0x00007FFFAF2C1000-memory.dmp

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memory/2108-12-0x00007FFFAE800000-0x00007FFFAF2C1000-memory.dmp

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memory/2108-18-0x00007FFFAE800000-0x00007FFFAF2C1000-memory.dmp

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memory/2108-15-0x00007FFFAE800000-0x00007FFFAF2C1000-memory.dmp

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memory/2108-14-0x00007FFFAE800000-0x00007FFFAF2C1000-memory.dmp

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memory/2108-13-0x00007FFFAE800000-0x00007FFFAF2C1000-memory.dmp

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memory/2108-7-0x00000236E3C40000-0x00000236E3C62000-memory.dmp

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