xworm | a1292bb41ddd4ffa51e1f7e435b0bb7308edf7aa521ecfdfe9660dd42f556744

Analysis

max time kernel
150s
max time network
147s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
04/06/2024, 16:05

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General

Target
XClient.exe
Size 61KB
Sample240604-tjs9asch73
SHA256 a1292bb41ddd4ffa51e1f7e435b0bb7308edf7aa521ecfdfe9660dd42f556744
MD5 c943a5b42a5c3581ab6bf74428858a73
SHA1 4d7e7769f93816070a433a19fc837ceb725f7317
SHA512 cecffb3605f3dc05368667966f3b5cbe3e843d9549ed30dc07cf8c04b317a64ae42f75dfbc300617e589dfa98afe8b851f5fa666a68a632170cf9326e048299a
SSDEEP 1536:A6P+jJfmzZFm6TObE5yWHY6doOkf4xqij:A6jzDm9bEV0OkfYj
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

Version

simpledays-44630.portmap.host:44630

Attributes

install_file
USB.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral3/memory/2536-1-0x00000000003A0000-0x00000000003B6000-memory.dmp	family_xworm

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

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

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

execution

PowerShell

T1059.001

pid	Process
1328	powershell.exe
4232	powershell.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
16	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 5 IoCs

pid	Process
1328	powershell.exe
1328	powershell.exe
4232	powershell.exe
4232	powershell.exe
2536	XClient.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2536	XClient.exe
Token: SeDebugPrivilege	1328	powershell.exe
Token: SeDebugPrivilege	4232	powershell.exe
Token: SeDebugPrivilege	2536	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2536	XClient.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2536 wrote to memory of 1328	2536	XClient.exe	84
PID 2536 wrote to memory of 1328	2536	XClient.exe	84
PID 2536 wrote to memory of 4232	2536	XClient.exe	87
PID 2536 wrote to memory of 4232	2536	XClient.exe	87

C:\Users\Admin\AppData\Local\Temp\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2536
- 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:1328
- 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:4232

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

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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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 85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c
MD5 627073ee3ca9676911bee35548eff2b8
SHA1 4c4b68c65e2cab9864b51167d710aa29ebdcff2e
SHA512 3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 36cbb00b016c9f97645fb628ef72b524dfbdf6e08d626e5c837bbbb9075dcb52
MD5 6903d57eed54e89b68ebb957928d1b99
SHA1 fade011fbf2e4bc044d41e380cf70bd6a9f73212
SHA512 c192ea9810fd22de8378269235c1035aa1fe1975a53c876fe4a7acc726c020f94773c21e4e4771133f9fcedb0209f0a5324c594c1db5b28fe1b27644db4fdc9e
MD5 SHA1 SHA512

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__PSScriptPolicyTest_hjc4rjzx.onc.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_hjc4rjzx.onc.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/1328-14-0x000002306AF00000-0x000002306AF22000-memory.dmp

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memory/1328-4-0x00007FFE097B0000-0x00007FFE0A272000-memory.dmp

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memory/1328-5-0x00007FFE097B0000-0x00007FFE0A272000-memory.dmp

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memory/1328-3-0x00007FFE097B0000-0x00007FFE0A272000-memory.dmp

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memory/1328-15-0x00007FFE097B0000-0x00007FFE0A272000-memory.dmp

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memory/1328-16-0x00007FFE097B0000-0x00007FFE0A272000-memory.dmp

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memory/1328-19-0x00007FFE097B0000-0x00007FFE0A272000-memory.dmp

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memory/2536-0-0x00007FFE097B3000-0x00007FFE097B5000-memory.dmp

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memory/2536-2-0x00007FFE097B0000-0x00007FFE0A272000-memory.dmp

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memory/2536-1-0x00000000003A0000-0x00000000003B6000-memory.dmp

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memory/2536-31-0x00007FFE097B0000-0x00007FFE0A272000-memory.dmp

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