xworm | f352579ae0f0f115437690d14b911aee168574c8bc061c475b9c83bb065932a1

General

Target

XClient.exe
Size

67KB
MD5

12c7786f3f9f87fc04fd3562d957a57a
SHA1

e4df265d2a5678e8620c6633a898647ac41514da
SHA256

f352579ae0f0f115437690d14b911aee168574c8bc061c475b9c83bb065932a1
SHA512

a43be5f5626c33211741f95f578666b4b3a40514bdd3726f5ca564fdba968a4b9f059e230cdd9625ade48ede2daeecfbd83f739bf21c3e74489210a16d094c08
SSDEEP

1536:Zc6GeeDwRMepnZ8k2fbRE+ptxb7Ed4pXD/6M/qOSYGLZ:60einZ8LDRE+ptxbw2zRyOSYuZ

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

147.185.221.19:33365:2137

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/memory/4828-0-0x0000000000150000-0x0000000000168000-memory.dmp	family_xworm
behavioral1/files/0x000c0000000233ef-58.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
4196	powershell.exe
1924	powershell.exe
2836	powershell.exe
1692	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

Executes dropped EXE 2 IoCs

pid	Process
2724	XClient.exe
216	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-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.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
2	ip-api.com

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

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2300	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
4196	powershell.exe
4196	powershell.exe
1924	powershell.exe
1924	powershell.exe
2836	powershell.exe
2836	powershell.exe
1692	powershell.exe
1692	powershell.exe
4828	XClient.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	4828	XClient.exe
Token: SeDebugPrivilege	4196	powershell.exe
Token: SeDebugPrivilege	1924	powershell.exe
Token: SeDebugPrivilege	2836	powershell.exe
Token: SeDebugPrivilege	1692	powershell.exe
Token: SeDebugPrivilege	4828	XClient.exe
Token: SeDebugPrivilege	2724	XClient.exe
Token: SeDebugPrivilege	216	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4828	XClient.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4828 wrote to memory of 4196	4828	XClient.exe	82
PID 4828 wrote to memory of 4196	4828	XClient.exe	82
PID 4828 wrote to memory of 1924	4828	XClient.exe	84
PID 4828 wrote to memory of 1924	4828	XClient.exe	84
PID 4828 wrote to memory of 2836	4828	XClient.exe	86
PID 4828 wrote to memory of 2836	4828	XClient.exe	86
PID 4828 wrote to memory of 1692	4828	XClient.exe	88
PID 4828 wrote to memory of 1692	4828	XClient.exe	88
PID 4828 wrote to memory of 2300	4828	XClient.exe	90
PID 4828 wrote to memory of 2300	4828	XClient.exe	90

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:4828
- 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:4196
- 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:1924
- 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:2836
- 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:1692
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Roaming\XClient.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2300

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2724

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:216

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\XClient.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
c28937317ffaecb0023533dc0069808d

SHA1
9f5175aeaf73db5ab967b57bd896a982a9c6e906

SHA256
f6cb138382b9333938304b47ca2fcab5d9fa5c3fa63665020872c49a5d7bd7a9

SHA512
2de2e86570c35021f4fecd1e9fec285d410d8e36fce3ef4d782ff8c7d43242f10de123dac7e1c0609c27f33e6b88c46d83bc47948ca0b0329ca0ba70a5105ce4

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
22310ad6749d8cc38284aa616efcd100

SHA1
440ef4a0a53bfa7c83fe84326a1dff4326dcb515

SHA256
55b1d8021c4eb4c3c0d75e3ed7a4eb30cd0123e3d69f32eeb596fe4ffec05abf

SHA512
2ef08e2ee15bb86695fe0c10533014ffed76ececc6e579d299d3365fafb7627f53e32e600bb6d872b9f58aca94f8cb7e1e94cdfd14777527f7f0aa019d9c6def

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_apnjfk5c.1zr.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\XClient.exe

Filesize
67KB

MD5
12c7786f3f9f87fc04fd3562d957a57a

SHA1
e4df265d2a5678e8620c6633a898647ac41514da

SHA256
f352579ae0f0f115437690d14b911aee168574c8bc061c475b9c83bb065932a1

SHA512
a43be5f5626c33211741f95f578666b4b3a40514bdd3726f5ca564fdba968a4b9f059e230cdd9625ade48ede2daeecfbd83f739bf21c3e74489210a16d094c08

Download Submit
memory/4196-14-0x00007FFA75250000-0x00007FFA75D11000-memory.dmp

Filesize
10.8MB

Download
memory/4196-15-0x00007FFA75250000-0x00007FFA75D11000-memory.dmp

Filesize
10.8MB

Download
memory/4196-18-0x00007FFA75250000-0x00007FFA75D11000-memory.dmp

Filesize
10.8MB

Download
memory/4196-13-0x00007FFA75250000-0x00007FFA75D11000-memory.dmp

Filesize
10.8MB

Download
memory/4196-9-0x00000265FA250000-0x00000265FA272000-memory.dmp

Filesize
136KB

Download
memory/4828-1-0x00007FFA75253000-0x00007FFA75255000-memory.dmp

Filesize
8KB

Download
memory/4828-2-0x00007FFA75250000-0x00007FFA75D11000-memory.dmp

Filesize
10.8MB

Download
memory/4828-57-0x00007FFA75250000-0x00007FFA75D11000-memory.dmp

Filesize
10.8MB

Download
memory/4828-0-0x0000000000150000-0x0000000000168000-memory.dmp

Filesize
96KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads