xworm | 4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c

General

Target

4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe
Size

63KB
MD5

32a5e227422369d29efe9899fa7f1cf1
SHA1

b8292a2a80b5b78f68b2b2b2b561d2926da81afa
SHA256

4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c
SHA512

1365b519c5e70bab0ca7319c8c0dceb6b428c89a793936e0708732de3fe1d77ea458bb5056fccf55f849a07964e7e937cb55ff2d0f79a464f1926e464ba31ec0
SSDEEP

1536:SIfKqlxoqCjVQVw28BBgdE9rIuVO/KbHEMaDdnYi96jdtOU3iKU:SIfKCxCjj20SdE9EeO/KbHEHRvCtOU3S

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

ii-heavy.gl.at.ply.gg:45541:45541

Attributes

Install_directory
%Userprofile%
install_file
XClient.exe

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/memory/2260-1-0x0000000001330000-0x0000000001346000-memory.dmp	family_xworm
behavioral1/files/0x0007000000010300-36.dat	family_xworm
behavioral1/memory/536-38-0x0000000000390000-0x00000000003A6000-memory.dmp	family_xworm
behavioral1/memory/1952-41-0x0000000000890000-0x00000000008A6000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
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
2772	powershell.exe
2580	powershell.exe
1524	powershell.exe
2868	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe

Executes dropped EXE 2 IoCs

pid	Process
536	XClient.exe
1952	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-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\XClient.exe"	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.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
4	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
1100	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2772	powershell.exe
2580	powershell.exe
1524	powershell.exe
2868	powershell.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2260	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe
Token: SeDebugPrivilege	2772	powershell.exe
Token: SeDebugPrivilege	2580	powershell.exe
Token: SeDebugPrivilege	1524	powershell.exe
Token: SeDebugPrivilege	2868	powershell.exe
Token: SeDebugPrivilege	2260	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe
Token: SeDebugPrivilege	536	XClient.exe
Token: SeDebugPrivilege	1952	XClient.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2260 wrote to memory of 2772	2260	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe	31
PID 2260 wrote to memory of 2772	2260	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe	31
PID 2260 wrote to memory of 2772	2260	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe	31
PID 2260 wrote to memory of 2580	2260	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe	33
PID 2260 wrote to memory of 2580	2260	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe	33
PID 2260 wrote to memory of 2580	2260	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe	33
PID 2260 wrote to memory of 1524	2260	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe	35
PID 2260 wrote to memory of 1524	2260	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe	35
PID 2260 wrote to memory of 1524	2260	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe	35
PID 2260 wrote to memory of 2868	2260	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe	37
PID 2260 wrote to memory of 2868	2260	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe	37
PID 2260 wrote to memory of 2868	2260	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe	37
PID 2260 wrote to memory of 1100	2260	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe	39
PID 2260 wrote to memory of 1100	2260	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe	39
PID 2260 wrote to memory of 1100	2260	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe	39
PID 1080 wrote to memory of 536	1080	taskeng.exe	42
PID 1080 wrote to memory of 536	1080	taskeng.exe	42
PID 1080 wrote to memory of 536	1080	taskeng.exe	42
PID 1080 wrote to memory of 1952	1080	taskeng.exe	44
PID 1080 wrote to memory of 1952	1080	taskeng.exe	44
PID 1080 wrote to memory of 1952	1080	taskeng.exe	44

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\4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe
"C:\Users\Admin\AppData\Local\Temp\4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2260
- 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\4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2772
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2580
- 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:1524
- 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:2868
- 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⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1100

C:\Windows\system32\taskeng.exe
taskeng.exe {E560E725-EE75-4AB5-8946-C7CAD9488609} S-1-5-21-1488793075-819845221-1497111674-1000:UPNECVIU\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1080
- C:\Users\Admin\XClient.exe
  C:\Users\Admin\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:536
- C:\Users\Admin\XClient.exe
  C:\Users\Admin\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1952

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

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
d3b4c08ec88f181855a803c3c8593836

SHA1
d6c9cdf102223342df16015f585fce76c6d7425d

SHA256
6bac34edacc417008504f2df14d9edfc8b40317f9d9e090f6b57e7c8f0765f05

SHA512
f6b995d78de9b288cc747d043e4f28fc53b86308721a419a9f5a17bff53dfd458a8316233f0d41f6438cd2cb1728989c63a9e98d279119093064750e8664e04e

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

Filesize
63KB

MD5
32a5e227422369d29efe9899fa7f1cf1

SHA1
b8292a2a80b5b78f68b2b2b2b561d2926da81afa

SHA256
4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c

SHA512
1365b519c5e70bab0ca7319c8c0dceb6b428c89a793936e0708732de3fe1d77ea458bb5056fccf55f849a07964e7e937cb55ff2d0f79a464f1926e464ba31ec0

Download Submit
memory/536-38-0x0000000000390000-0x00000000003A6000-memory.dmp

Filesize
88KB

Download
memory/1952-41-0x0000000000890000-0x00000000008A6000-memory.dmp

Filesize
88KB

Download
memory/2260-2-0x000007FEF6160000-0x000007FEF6B4C000-memory.dmp

Filesize
9.9MB

Download
memory/2260-0-0x000007FEF6163000-0x000007FEF6164000-memory.dmp

Filesize
4KB

Download
memory/2260-28-0x000007FEF6163000-0x000007FEF6164000-memory.dmp

Filesize
4KB

Download
memory/2260-34-0x000007FEF6160000-0x000007FEF6B4C000-memory.dmp

Filesize
9.9MB

Download
memory/2260-1-0x0000000001330000-0x0000000001346000-memory.dmp

Filesize
88KB

Download
memory/2580-15-0x000000001B580000-0x000000001B862000-memory.dmp

Filesize
2.9MB

Download
memory/2580-16-0x00000000029E0000-0x00000000029E8000-memory.dmp

Filesize
32KB

Download
memory/2772-7-0x0000000002C00000-0x0000000002C80000-memory.dmp

Filesize
512KB

Download
memory/2772-8-0x000000001B750000-0x000000001BA32000-memory.dmp

Filesize
2.9MB

Download
memory/2772-9-0x0000000001D20000-0x0000000001D28000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads