xworm | 58c749a1a703be49dbb1b304a986e53fc85e90a19e11320fb1350d3d15ced085

Analysis

max time kernel
145s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
05/06/2024, 15:50

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General

Target
XClient.exe
Size 56KB
Sample240605-s9554sca88
SHA256 58c749a1a703be49dbb1b304a986e53fc85e90a19e11320fb1350d3d15ced085
MD5 985225545ed3d13712cb52f3c46adbc0
SHA1 07c741015943143c4d329c488c2a0a2435e789c5
SHA512 947e95492867d0a042345f7a6d27a313b3579d150f8f97b971f04db8dbe39a2a91fc8d787cf826979b7eaf26d07a152a0798c73f905b87e84e4a85bc2702e216
SSDEEP 768:ecKym4oFRLdgKCD/SDu1P6SN/bto1ISU7IU6CxOAhlZQ9ey:PKGoRLOpDr16Ybto/U6SOAxa/
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%Userprofile%
install_file
XClient.exe
pastebin_url
https://pastebin.com/raw/DKqen16V

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/2272-1-0x0000000000C10000-0x0000000000C24000-memory.dmp	family_xworm
behavioral2/files/0x000d00000002296b-59.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
528	powershell.exe
4436	powershell.exe
384	powershell.exe
1436	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-1-5-21-3906287020-2915474608-1755617787-1000\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

Executes dropped EXE 3 IoCs

pid	Process
2656	XClient.exe
364	XClient.exe
1356	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-1-5-21-3906287020-2915474608-1755617787-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\XClient.exe"	XClient.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 5 IoCs

Web Service

T1102

flow	ioc
19	pastebin.com
29	2.tcp.eu.ngrok.io
45	2.tcp.eu.ngrok.io
59	2.tcp.eu.ngrok.io
18	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
15	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
5100	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
528	powershell.exe
528	powershell.exe
4436	powershell.exe
4436	powershell.exe
384	powershell.exe
384	powershell.exe
1436	powershell.exe
1436	powershell.exe
2272	XClient.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	2272	XClient.exe
Token: SeDebugPrivilege	528	powershell.exe
Token: SeDebugPrivilege	4436	powershell.exe
Token: SeDebugPrivilege	384	powershell.exe
Token: SeDebugPrivilege	1436	powershell.exe
Token: SeDebugPrivilege	2272	XClient.exe
Token: SeDebugPrivilege	2656	XClient.exe
Token: SeDebugPrivilege	364	XClient.exe
Token: SeDebugPrivilege	1356	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2272	XClient.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2272 wrote to memory of 528	2272	XClient.exe	88
PID 2272 wrote to memory of 528	2272	XClient.exe	88
PID 2272 wrote to memory of 4436	2272	XClient.exe	90
PID 2272 wrote to memory of 4436	2272	XClient.exe	90
PID 2272 wrote to memory of 384	2272	XClient.exe	92
PID 2272 wrote to memory of 384	2272	XClient.exe	92
PID 2272 wrote to memory of 1436	2272	XClient.exe	94
PID 2272 wrote to memory of 1436	2272	XClient.exe	94
PID 2272 wrote to memory of 5100	2272	XClient.exe	97
PID 2272 wrote to memory of 5100	2272	XClient.exe	97

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:2272
- 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:528
- 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:4436
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:384
- 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:1436
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\XClient.exe"
  2⤵
  - Creates scheduled task(s)
  PID:5100

C:\Users\Admin\XClient.exe
C:\Users\Admin\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2656

C:\Users\Admin\XClient.exe
C:\Users\Admin\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:364

C:\Users\Admin\XClient.exe
C:\Users\Admin\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1356

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

Web Service

T1102

Exfiltration

Impact

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Downloads

XClient.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\XClient.exe.log
Size 654B
SHA256 e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced
MD5 2ff39f6c7249774be85fd60a8f9a245e
SHA1 684ff36b31aedc1e587c8496c02722c6698c1c4e
SHA512 1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1
MD5 SHA1 SHA512

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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 385da35673330e21ac02545220552fe301fe54dedefbdafc097ac4342a295233
MD5 2e907f77659a6601fcc408274894da2e
SHA1 9f5b72abef1cd7145bf37547cdb1b9254b4efe9d
SHA512 34fa0fff24f6550f55f828541aaefe5d75c86f8f0842d54b50065e9746f9662bb7209c74c9a9571540b9855bb3851f01db613190024e89b198d485bb5dc07721
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 5ef1421e19fde4bc03cd825dd7d6c0e7863f85fd8f0aa4a4d4f8d555dc7606d1
MD5 ba169f4dcbbf147fe78ef0061a95e83b
SHA1 92a571a6eef49fff666e0f62a3545bcd1cdcda67
SHA512 8d2e5e552210dcda684682538bc964fdd8a8ff5b24cc2cc8af813729f0202191f98eb42d38d2355df17ae620fe401aad6ceaedaed3b112fdacd32485a3a0c07c
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 d6fa39eab7ee36f44dc3f9f2839d098433db95c1eba924e4bcf4e5c0d268d961
MD5 15dde0683cd1ca19785d7262f554ba93
SHA1 d039c577e438546d10ac64837b05da480d06bf69
SHA512 57c0e1b87bc1c136f0d39f3ce64bb8f8274a0491e4ca6e45e5c7f9070aa9d9370c6f590ce37cd600b252df2638d870205249a514c43245ca7ed49017024a4672
MD5 SHA1 SHA512

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__PSScriptPolicyTest_0pocy1bw.wlh.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_0pocy1bw.wlh.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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XClient.exe

Path C:\Users\Admin\XClient.exe
Size 56KB
SHA256 58c749a1a703be49dbb1b304a986e53fc85e90a19e11320fb1350d3d15ced085
MD5 985225545ed3d13712cb52f3c46adbc0
SHA1 07c741015943143c4d329c488c2a0a2435e789c5
SHA512 947e95492867d0a042345f7a6d27a313b3579d150f8f97b971f04db8dbe39a2a91fc8d787cf826979b7eaf26d07a152a0798c73f905b87e84e4a85bc2702e216
SSDEEP 768:ecKym4oFRLdgKCD/SDu1P6SN/bto1ISU7IU6CxOAhlZQ9ey:PKGoRLOpDr16Ybto/U6SOAxa/
MD5 SHA1 SHA512 SSDEEP

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memory/528-14-0x00007FFCDBC00000-0x00007FFCDC6C1000-memory.dmp

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memory/528-15-0x00007FFCDBC00000-0x00007FFCDC6C1000-memory.dmp

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memory/528-16-0x00007FFCDBC00000-0x00007FFCDC6C1000-memory.dmp

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memory/528-19-0x00007FFCDBC00000-0x00007FFCDC6C1000-memory.dmp

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memory/528-13-0x00007FFCDBC00000-0x00007FFCDC6C1000-memory.dmp

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memory/528-3-0x000002389F7A0000-0x000002389F7C2000-memory.dmp

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memory/2272-0-0x00007FFCDBC03000-0x00007FFCDBC05000-memory.dmp

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memory/2272-2-0x00007FFCDBC00000-0x00007FFCDC6C1000-memory.dmp

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memory/2272-61-0x00007FFCDBC03000-0x00007FFCDBC05000-memory.dmp

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memory/2272-62-0x00007FFCDBC00000-0x00007FFCDC6C1000-memory.dmp

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memory/2272-1-0x0000000000C10000-0x0000000000C24000-memory.dmp

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