xworm | 378d29703f868965fb7f302df6ba41c86d082457cf1d1ac4a3a03439667ddb8b

Analysis

max time kernel
121s
max time network
129s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
08/06/2024, 19:39

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General

Target
XClient.exe
Size 77KB
Sample240608-ydbjhsga45
SHA256 378d29703f868965fb7f302df6ba41c86d082457cf1d1ac4a3a03439667ddb8b
MD5 ef4458792b0cb6ac36ec855d8fa22746
SHA1 0b1df777312b444dc0fecc83a2961d8184424f29
SHA512 14eaaf133c1a9e863b644962ae48b9c1d46529d8919ef286ca07ee8cc142b28d0bb49683cf85110953f4ca6476415e0286421d2e931b5e259a6cc1b1e6a5ab65
SSDEEP 1536:cnEvrcA42wxrCQBvHbzaRnbkEKTwYR564OXHKG2:gQQWbkPw6DOXN2
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

moving-agenda.gl.at.ply.gg:7000

Attributes

Install_directory
%ProgramData%
install_file
conhost.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/4296-1-0x0000000000E60000-0x0000000000E7A000-memory.dmp	family_xworm
behavioral2/files/0x000800000002324e-62.dat	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
4012	powershell.exe
2688	powershell.exe
3912	powershell.exe
4732	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-1-5-21-3808065738-1666277613-1125846146-1000\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\conhost.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\conhost.lnk	XClient.exe

Executes dropped EXE 1 IoCs

pid	Process
1956	conhost.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-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\conhost = "C:\\ProgramData\\conhost.exe"	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
13	ip-api.com

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
3984	schtasks.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
2688	powershell.exe
2688	powershell.exe
3912	powershell.exe
3912	powershell.exe
4732	powershell.exe
4732	powershell.exe
4732	powershell.exe
4012	powershell.exe
4012	powershell.exe
4012	powershell.exe
4296	XClient.exe
4296	XClient.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	4296	XClient.exe
Token: SeDebugPrivilege	2688	powershell.exe
Token: SeDebugPrivilege	3912	powershell.exe
Token: SeDebugPrivilege	4732	powershell.exe
Token: SeDebugPrivilege	4012	powershell.exe
Token: SeDebugPrivilege	4296	XClient.exe
Token: SeDebugPrivilege	1956	conhost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4296	XClient.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4296 wrote to memory of 2688	4296	XClient.exe	92
PID 4296 wrote to memory of 2688	4296	XClient.exe	92
PID 4296 wrote to memory of 3912	4296	XClient.exe	94
PID 4296 wrote to memory of 3912	4296	XClient.exe	94
PID 4296 wrote to memory of 4732	4296	XClient.exe	98
PID 4296 wrote to memory of 4732	4296	XClient.exe	98
PID 4296 wrote to memory of 4012	4296	XClient.exe	101
PID 4296 wrote to memory of 4012	4296	XClient.exe	101
PID 4296 wrote to memory of 3984	4296	XClient.exe	104
PID 4296 wrote to memory of 3984	4296	XClient.exe	104

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\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:4296
- 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:2688
- 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:3912
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\conhost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4732
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'conhost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4012
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "conhost" /tr "C:\ProgramData\conhost.exe"
  2⤵
  - Creates scheduled task(s)
  PID:3984

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4136 --field-trial-handle=2744,i,16362475727591565961,3676688664819797550,262144 --variations-seed-version /prefetch:8
1⤵
PID:1004

C:\ProgramData\conhost.exe
C:\ProgramData\conhost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1956

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

conhost.exe

Path C:\ProgramData\conhost.exe
Size 77KB
SHA256 378d29703f868965fb7f302df6ba41c86d082457cf1d1ac4a3a03439667ddb8b
MD5 ef4458792b0cb6ac36ec855d8fa22746
SHA1 0b1df777312b444dc0fecc83a2961d8184424f29
SHA512 14eaaf133c1a9e863b644962ae48b9c1d46529d8919ef286ca07ee8cc142b28d0bb49683cf85110953f4ca6476415e0286421d2e931b5e259a6cc1b1e6a5ab65
SSDEEP 1536:cnEvrcA42wxrCQBvHbzaRnbkEKTwYR564OXHKG2:gQQWbkPw6DOXN2
MD5 SHA1 SHA512 SSDEEP

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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 986366767de5873f1b170a63f2a33ce05132d1afd90c8f5017afbca8ef1beb05
MD5 3a6bad9528f8e23fb5c77fbd81fa28e8
SHA1 f127317c3bc6407f536c0f0600dcbcf1aabfba36
SHA512 846002154a0ece6f3e9feda6f115d3161dc21b3789525dd62ae1d9188495171293efdbe7be4710666dd8a15e66b557315b5a02918a741ed1d5f3ff0c515b98e2
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 3284cae7b82be99d93064390ba071ba4321f3f24dd21515b37b2ca9f31b2e8d5
MD5 e3b6cc0fbea08a0831f0026a696db8b8
SHA1 4e32202d4700061cfd80d55e42798131c9f530d4
SHA512 6a06856f360b48c8bc8a15ffb8d7a6604ec357bcb1d0fad5d71a2cb876929a7b67eb40ba4493998ab1bbae8cb71212e124276f27d5c138a135041c27a41a0b7a
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 98616a32e387ad9ae2f6faddc53cd60e0ba50fe4088abdc51b82b309cc8771bd
MD5 18470dd1aa7811c5a9825ea59429223b
SHA1 75859ea7baf1a8f5ba652ca783bb15f07615cc32
SHA512 cc8ff35595460d3ef16589cbab347ac07eff8b62766bfbceb386507ac631d433a2aa9187b0d6cef2b30b1fa08c92bc5a0061e984cc37c378119dcf51212f3def
MD5 SHA1 SHA512

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__PSScriptPolicyTest_23j43s5l.22z.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_23j43s5l.22z.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/2688-14-0x00007FF82DDE0000-0x00007FF82E8A1000-memory.dmp

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memory/2688-15-0x00007FF82DDE0000-0x00007FF82E8A1000-memory.dmp

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memory/2688-16-0x00007FF82DDE0000-0x00007FF82E8A1000-memory.dmp

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memory/2688-17-0x00007FF82DDE0000-0x00007FF82E8A1000-memory.dmp

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memory/2688-20-0x00007FF82DDE0000-0x00007FF82E8A1000-memory.dmp

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memory/2688-13-0x000001D245C00000-0x000001D245C22000-memory.dmp

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memory/2688-3-0x00007FF82DDE0000-0x00007FF82E8A1000-memory.dmp

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memory/4296-0-0x00007FF82DDE3000-0x00007FF82DDE5000-memory.dmp

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memory/4296-2-0x00007FF82DDE0000-0x00007FF82E8A1000-memory.dmp

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memory/4296-59-0x00007FF82DDE3000-0x00007FF82DDE5000-memory.dmp

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memory/4296-60-0x00007FF82DDE0000-0x00007FF82E8A1000-memory.dmp

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memory/4296-1-0x0000000000E60000-0x0000000000E7A000-memory.dmp

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