xworm | eb4dfa1cb07624ae91f6e5ac8e42d288513d676804cf10b699d2f771adcf0649

Analysis

max time kernel
147s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
20/06/2024, 17:21

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General

Target
XClient.exe
Size 69KB
Sample240620-vw8p7atapp
SHA256 eb4dfa1cb07624ae91f6e5ac8e42d288513d676804cf10b699d2f771adcf0649
MD5 795301138b135739b39687f74783795e
SHA1 2d22eef25a53d6246a13ddd51e7d297923a5e728
SHA512 9b0908d3aaaac16898da159ab1a6a0b76bb0a355a73f3cec53b28680bdf8cc9c142575def43007ccf02ae55d8c8dafa32bd049e8389c776de170886b4e89f206
SSDEEP 1536:vlKHzR49jRAxPlGRcEkcpwkKDbOR+SF6i7mnsYOG2TOp1MJes:v0HajRArSc1JbOd7mnsYOrTOp12es
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

Version

silver-bowl.gl.at.ply.gg:29206

Attributes

Install_directory
%AppData%
install_file
USB.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/896-1-0x0000000000610000-0x0000000000628000-memory.dmp	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
2024	powershell.exe
2052	powershell.exe
4896	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-1-5-21-1337824034-2731376981-3755436523-1000\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

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
2	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 7 IoCs

pid	Process
2024	powershell.exe
2024	powershell.exe
2052	powershell.exe
2052	powershell.exe
4896	powershell.exe
4896	powershell.exe
896	XClient.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	896	XClient.exe
Token: SeDebugPrivilege	2024	powershell.exe
Token: SeDebugPrivilege	2052	powershell.exe
Token: SeDebugPrivilege	4896	powershell.exe
Token: SeDebugPrivilege	896	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
896	XClient.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 896 wrote to memory of 2024	896	XClient.exe	86
PID 896 wrote to memory of 2024	896	XClient.exe	86
PID 896 wrote to memory of 2052	896	XClient.exe	88
PID 896 wrote to memory of 2052	896	XClient.exe	88
PID 896 wrote to memory of 4896	896	XClient.exe	90
PID 896 wrote to memory of 4896	896	XClient.exe	90

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 behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:896
- 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:2052
- 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:4896

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

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 21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45
MD5 d28a889fd956d5cb3accfbaf1143eb6f
SHA1 157ba54b365341f8ff06707d996b3635da8446f7
SHA512 0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 b99f3c778a047e0348c92c16e0419fa29418d10d0fec61ad8283e92a094a2b32
MD5 aeceee3981c528bdc5e1c635b65d223d
SHA1 de9939ed37edca6772f5cdd29f6a973b36b7d31b
SHA512 df48285f38e9284efdbd9f8d99e2e94a46fb5465953421ab88497b73ae06895b98ea5c98796560810a6f342c31a9112ea87e03cd3e267fd8518d7585f492a8fb
MD5 SHA1 SHA512

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__PSScriptPolicyTest_1yhpjckg.ck0.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1yhpjckg.ck0.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/896-0-0x00007FF85B423000-0x00007FF85B425000-memory.dmp

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memory/896-1-0x0000000000610000-0x0000000000628000-memory.dmp

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memory/896-2-0x00007FF85B420000-0x00007FF85BEE1000-memory.dmp

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memory/896-45-0x00007FF85B420000-0x00007FF85BEE1000-memory.dmp

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memory/2024-3-0x00007FF85B420000-0x00007FF85BEE1000-memory.dmp

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memory/2024-4-0x00007FF85B420000-0x00007FF85BEE1000-memory.dmp

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memory/2024-10-0x000002389E3E0000-0x000002389E402000-memory.dmp

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memory/2024-17-0x00007FF85B420000-0x00007FF85BEE1000-memory.dmp

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