xworm | 1f4fbb86e1e513b8bed2fa7a011d094e9f4dbb213e7ae8c34693c6f5343442c3

General

Target

Prism Release/Prism Release V1.5.exe
Size

5.1MB
MD5

ac80f970a7ae1c07663abdd11d752d34
SHA1

5ee4c0de86dc91aebb47f3ea6b7e624e861fdfad
SHA256

b61ca7c42fef43547c7892c76a925ec4a846373bfcde20426c913a4390f71001
SHA512

7bd6150976477bec27532e7d7449e8a1ee6997b41359f3b31e2da8db0602f1ac0dfae171d8ebe00a0e18c2c77c7f9e4ed18352f7d8cf76c1cff855166ed6f94b
SSDEEP

98304:crjAG8empOd+SyaREAaOeaD5lWsjvi+ffzwZZHUzItLqbn82rh:3ppcNJQkjvi+ffzwZZJiR1

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

91.92.241.69:5555

Attributes

Install_directory
%ProgramData%
install_file
Windows Runtime.exe

Signatures

Detect Xworm Payload 2 IoCs

Processes:

resource	yara_rule
\Users\Admin\dllhost.exe	family_xworm
behavioral3/memory/2072-18-0x0000000000980000-0x000000000099A000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Command and Scripting Interpreter: PowerShell 1 TTPs 6 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
execution

PowerShell
T1059.001

Processes:

powershell.exepowershell.exepowershell.exepowershell.exepowershell.exepowershell.exe

pid process

2440 powershell.exe
1440 powershell.exe
1860 powershell.exe
2588 powershell.exe
2232 powershell.exe
2216 powershell.exe

pid	process
2440	powershell.exe
1440	powershell.exe
1860	powershell.exe
2588	powershell.exe
2232	powershell.exe
2216	powershell.exe

Drops startup file 2 IoCs

Processes:

dllhost.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Windows Runtime.lnk	dllhost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Windows Runtime.lnk	dllhost.exe

Executes dropped EXE 3 IoCs

Processes:

dllhost.exePrism Executor.exenexusloader.exe

pid process

2072 dllhost.exe
2688 Prism Executor.exe
1748 nexusloader.exe
Loads dropped DLL 4 IoCs

Processes:

Prism Release V1.5.exePrism Executor.exenexusloader.exe

pid process

1560 Prism Release V1.5.exe
1560 Prism Release V1.5.exe
2688 Prism Executor.exe
1748 nexusloader.exe

pid	process
2072	dllhost.exe
2688	Prism Executor.exe
1748	nexusloader.exe

pid	process
1560	Prism Release V1.5.exe
1560	Prism Release V1.5.exe
2688	Prism Executor.exe
1748	nexusloader.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

dllhost.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1340930862-1405011213-2821322012-1000\Software\Microsoft\Windows\CurrentVersion\Run\Windows Runtime = "C:\\ProgramData\\Windows Runtime.exe"	dllhost.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.

Processes:

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
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

Processes:

schtasks.exe

pid process

1036 schtasks.exe
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

dllhost.exe

pid process

2072 dllhost.exe
Suspicious behavior: EnumeratesProcesses 7 IoCs

Processes:

powershell.exepowershell.exepowershell.exepowershell.exepowershell.exepowershell.exedllhost.exe

pid process

2216 powershell.exe
2232 powershell.exe
2440 powershell.exe
1440 powershell.exe
1860 powershell.exe
2588 powershell.exe
2072 dllhost.exe

flow	ioc
2	ip-api.com

pid	process
1036	schtasks.exe

pid	process
2072	dllhost.exe

pid	process
2216	powershell.exe
2232	powershell.exe
2440	powershell.exe
1440	powershell.exe
1860	powershell.exe
2588	powershell.exe
2072	dllhost.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

Processes:

powershell.exepowershell.exedllhost.exepowershell.exepowershell.exepowershell.exepowershell.exe

description	pid	process
Token: SeDebugPrivilege	2216	powershell.exe
Token: SeDebugPrivilege	2232	powershell.exe
Token: SeDebugPrivilege	2072	dllhost.exe
Token: SeDebugPrivilege	2440	powershell.exe
Token: SeDebugPrivilege	1440	powershell.exe
Token: SeDebugPrivilege	1860	powershell.exe
Token: SeDebugPrivilege	2588	powershell.exe
Token: SeDebugPrivilege	2072	dllhost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

dllhost.exe

pid process

2072 dllhost.exe

pid	process
2072	dllhost.exe

Suspicious use of WriteProcessMemory 34 IoCs

Processes:

Prism Release V1.5.exePrism Executor.exedllhost.exe

description	pid	process	target process
PID 1560 wrote to memory of 2232	1560	Prism Release V1.5.exe	powershell.exe
PID 1560 wrote to memory of 2232	1560	Prism Release V1.5.exe	powershell.exe
PID 1560 wrote to memory of 2232	1560	Prism Release V1.5.exe	powershell.exe
PID 1560 wrote to memory of 2232	1560	Prism Release V1.5.exe	powershell.exe
PID 1560 wrote to memory of 2216	1560	Prism Release V1.5.exe	powershell.exe
PID 1560 wrote to memory of 2216	1560	Prism Release V1.5.exe	powershell.exe
PID 1560 wrote to memory of 2216	1560	Prism Release V1.5.exe	powershell.exe
PID 1560 wrote to memory of 2216	1560	Prism Release V1.5.exe	powershell.exe
PID 1560 wrote to memory of 2072	1560	Prism Release V1.5.exe	dllhost.exe
PID 1560 wrote to memory of 2072	1560	Prism Release V1.5.exe	dllhost.exe
PID 1560 wrote to memory of 2072	1560	Prism Release V1.5.exe	dllhost.exe
PID 1560 wrote to memory of 2072	1560	Prism Release V1.5.exe	dllhost.exe
PID 1560 wrote to memory of 2688	1560	Prism Release V1.5.exe	Prism Executor.exe
PID 1560 wrote to memory of 2688	1560	Prism Release V1.5.exe	Prism Executor.exe
PID 1560 wrote to memory of 2688	1560	Prism Release V1.5.exe	Prism Executor.exe
PID 1560 wrote to memory of 2688	1560	Prism Release V1.5.exe	Prism Executor.exe
PID 2688 wrote to memory of 1748	2688	Prism Executor.exe	nexusloader.exe
PID 2688 wrote to memory of 1748	2688	Prism Executor.exe	nexusloader.exe
PID 2688 wrote to memory of 1748	2688	Prism Executor.exe	nexusloader.exe
PID 2072 wrote to memory of 2440	2072	dllhost.exe	powershell.exe
PID 2072 wrote to memory of 2440	2072	dllhost.exe	powershell.exe
PID 2072 wrote to memory of 2440	2072	dllhost.exe	powershell.exe
PID 2072 wrote to memory of 1440	2072	dllhost.exe	powershell.exe
PID 2072 wrote to memory of 1440	2072	dllhost.exe	powershell.exe
PID 2072 wrote to memory of 1440	2072	dllhost.exe	powershell.exe
PID 2072 wrote to memory of 1860	2072	dllhost.exe	powershell.exe
PID 2072 wrote to memory of 1860	2072	dllhost.exe	powershell.exe
PID 2072 wrote to memory of 1860	2072	dllhost.exe	powershell.exe
PID 2072 wrote to memory of 2588	2072	dllhost.exe	powershell.exe
PID 2072 wrote to memory of 2588	2072	dllhost.exe	powershell.exe
PID 2072 wrote to memory of 2588	2072	dllhost.exe	powershell.exe
PID 2072 wrote to memory of 1036	2072	dllhost.exe	schtasks.exe
PID 2072 wrote to memory of 1036	2072	dllhost.exe	schtasks.exe
PID 2072 wrote to memory of 1036	2072	dllhost.exe	schtasks.exe

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\Prism Release\Prism Release V1.5.exe
"C:\Users\Admin\AppData\Local\Temp\Prism Release\Prism Release V1.5.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1560

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAHoAdABtACMAPgBBAGQAZAAtAFQAeQBwAGUAIAAtAEEAcwBzAGUAbQBiAGwAeQBOAGEAbQBlACAAUwB5AHMAdABlAG0ALgBXAGkAbgBkAG8AdwBzAC4ARgBvAHIAbQBzADsAPAAjAHEAegBnACMAPgBbAFMAeQBzAHQAZQBtAC4AVwBpAG4AZABvAHcAcwAuAEYAbwByAG0AcwAuAE0AZQBzAHMAYQBnAGUAQgBvAHgAXQA6ADoAUwBoAG8AdwAoACcALgBnAGcALwBnAGUAdABwAHIAaQBzAG0AIAAtACAAUgB1AG4AIABBAHMAIABBAGQAbQBpAG4AIABJAGYAIABJAG4AagBlAGMAdABpAG8AbgAgAEYAYQBpAGwAcwAnACwAJwAnACwAJwBPAEsAJwAsACcASQBuAGYAbwByAG0AYQB0AGkAbwBuACcAKQA8ACMAdQBzAGQAIwA+AA=="
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2232

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAGYAdAB2ACMAPgBBAGQAZAAtAE0AcABQAHIAZQBmAGUAcgBlAG4AYwBlACAAPAAjAGYAcQB1ACMAPgAgAC0ARQB4AGMAbAB1AHMAaQBvAG4AUABhAHQAaAAgAEAAKAAkAGUAbgB2ADoAVQBzAGUAcgBQAHIAbwBmAGkAbABlACwAJABlAG4AdgA6AFMAeQBzAHQAZQBtAEQAcgBpAHYAZQApACAAPAAjAHYAdQBwACMAPgAgAC0ARgBvAHIAYwBlACAAPAAjAGYAdwBhACMAPgA="
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2216

C:\Users\Admin\dllhost.exe
"C:\Users\Admin\dllhost.exe"
2⤵
- Drops startup file
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2072

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\dllhost.exe'
3⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2440

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'dllhost.exe'
3⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1440

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\Windows Runtime.exe'
3⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1860

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Windows Runtime.exe'
3⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2588

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Windows Runtime" /tr "C:\ProgramData\Windows Runtime.exe"
3⤵
- Creates scheduled task(s)
PID:1036

C:\Users\Admin\Prism Executor.exe
"C:\Users\Admin\Prism Executor.exe"
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2688

C:\Users\Admin\AppData\Local\Temp\onefile_2688_133629145316122000\nexusloader.exe
"C:\Users\Admin\Prism Executor.exe"
3⤵
- Executes dropped EXE
- Loads dropped DLL
PID:1748

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

Scheduled Task/Job

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Query Registry

1

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\onefile_2688_133629145316122000\python310.dll
Filesize
4.2MB

MD5
384349987b60775d6fc3a6d202c3e1bd

SHA1
701cb80c55f859ad4a31c53aa744a00d61e467e5

SHA256
f281c2e252ed59dd96726dbb2de529a2b07b818e9cc3799d1ffa9883e3028ed8

SHA512
6bf3ef9f08f4fc07461b6ea8d9822568ad0a0f211e471b990f62c6713adb7b6be28b90f206a4ec0673b92bae99597d1c7785381e486f6091265c7df85ff0f9b5

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms
Filesize
7KB

MD5
33d30bffa7f7f0648347328645b0b3bd

SHA1
975a5816c602cff73d4ab8731a91dac352f7a025

SHA256
fbbfa74a6e380ea8f7d79900b35cfd476eed1bef7a1f1344d3df0c6fe326767e

SHA512
df8e97bfe13605a31d9795a2ac14b243139bdea8c1834f58964d9df8e1ec4b0f72ec826115faf99468d070b64ee742db21e5a912b60e6a7b898bac412bc1a5d3

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms
Filesize
7KB

MD5
aa234b7b6ba8319a71070f62bdae9444

SHA1
890260acfa11a7e0f5ca6a968081558f3a71ef1b

SHA256
866d9b7112a5df62806b2bda6e5e6c158a0128f0d72ded103ade6718c381e811

SHA512
a099e4e0f02599d11297323dd6fd74b090a7962c8928c830748452db56c07f90db263d9425a82ad98447eb972013637dc59701405a4b638cd029658bc53894ff

Download Submit
\??\PIPE\srvsvc
MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

Download Submit
\Users\Admin\AppData\Local\Temp\onefile_2688_133629145316122000\nexusloader.exe
Filesize
3.5MB

MD5
58545dc488990ac11872079d119f8284

SHA1
dade5c16834d582a5187041697cc5a7c2eae2f88

SHA256
6669bd79928492ab626c6cc64de35e3da76d655bbd197b5cc644584014fea5bc

SHA512
93d6e3f6a2ff03b4b58db7c04f8ad00e5c5f95eceefd199b73a8af6009ef381f758825ebe3d0d3076f917299c850b2859fb2ec35eeef59126617d2a0ec54dcd7

Download Submit
\Users\Admin\Prism Executor.exe
Filesize
5.0MB

MD5
fa819e23d8fee4ea89aaaea55e0b28f5

SHA1
18335d4e0d140dcab66c7197c57f669251898ce5

SHA256
bb4fbbf322982321c56ac48cb7939ef7cb823b510a184c41e284f2cdf1bab68c

SHA512
e6170df5c8705e96a76cb3b366c9410c8f8e5c5dd5753de9be87e47a1c989b4723dd655e3355d52096f7acd3185a5469ed5bf284e7765e9519522ae132cef07d

Download Submit
\Users\Admin\dllhost.exe
Filesize
78KB

MD5
4a7f75343aaa5a4d8d18add50ccf3139

SHA1
110c62eee6d7deb4aa9d601c942eae43482d2125

SHA256
34be6a934fd45752e788f9ba20943c8e52d91732d76e9f30a5176e98dccd956e

SHA512
1f1516fc41e0b90d0d47e306da15a542799425159f4ad476cf4fd88b9b56d200c79c72ce29ca5b0acf2a195cabe803c37c72b8d76e99a69a04dbfe1fb9f9fc79

Download Submit
memory/2072-18-0x0000000000980000-0x000000000099A000-memory.dmp

Filesize
104KB

Download
memory/2440-1879-0x000000001B640000-0x000000001B922000-memory.dmp

Filesize
2.9MB

Download
memory/2440-1880-0x0000000001E60000-0x0000000001E68000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads