xworm | f95ed314284ad238bdf3d9277c9fd167229958d4d8027b7f198389964c91a202

General

Target

XClie2nt.exe
Size

321KB
MD5

37c1287dc27dbeaa0bff7ba6cb5e4a77
SHA1

ecd1109a9ef42d06510d63e733725177ef00034a
SHA256

f95ed314284ad238bdf3d9277c9fd167229958d4d8027b7f198389964c91a202
SHA512

3fc2bc30ed9910b3bbcfbb6ad62fa70f11df7e15d2c1f7e7bf8ec328f04cd7434bd45197b4792496619ecde45495607d6b11b958011664cc0246d399fd3772d5
SSDEEP

1536:PVdEFYXtycU1aELbRR+bAxClpygbK+EaOhQoKVoPCQsFGfFuAYCRAutPsAzAUCBa:PVdEq9WjT+b2kzbwaOCBK

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

rat234678235481254.ddns.net:4782

<Xwormmm>:1234

Attributes

Install_directory
%AppData%
install_file
Runtime Broker.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/memory/1792-0-0x0000000000C70000-0x0000000000CC6000-memory.dmp	family_xworm
behavioral1/files/0x0014000000016964-9.dat	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm

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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	XClie2nt.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Runtime Broker.lnk	XClie2nt.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Runtime Broker.lnk	XClie2nt.exe

Executes dropped EXE 2 IoCs

pid	Process
4336	Runtime Broker.exe
1972	Runtime Broker.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-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Runtime Broker = "C:\\Users\\Admin\\AppData\\Roaming\\Runtime Broker.exe"	XClie2nt.exe

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
4636	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1792	XClie2nt.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1792	XClie2nt.exe
Token: SeDebugPrivilege	1792	XClie2nt.exe
Token: SeDebugPrivilege	4336	Runtime Broker.exe
Token: SeDebugPrivilege	1972	Runtime Broker.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1792	XClie2nt.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 1792 wrote to memory of 4636	1792	XClie2nt.exe	91
PID 1792 wrote to memory of 4636	1792	XClie2nt.exe	91

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\XClie2nt.exe
"C:\Users\Admin\AppData\Local\Temp\XClie2nt.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:1792
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Runtime Broker" /tr "C:\Users\Admin\AppData\Roaming\Runtime Broker.exe"
  2⤵
  - Creates scheduled task(s)
  PID:4636

C:\Users\Admin\AppData\Roaming\Runtime Broker.exe
"C:\Users\Admin\AppData\Roaming\Runtime Broker.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4336

C:\Users\Admin\AppData\Roaming\Runtime Broker.exe
"C:\Users\Admin\AppData\Roaming\Runtime Broker.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1972

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

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

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\Runtime Broker.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
C:\Users\Admin\AppData\Roaming\Runtime Broker.exe

Filesize
321KB

MD5
37c1287dc27dbeaa0bff7ba6cb5e4a77

SHA1
ecd1109a9ef42d06510d63e733725177ef00034a

SHA256
f95ed314284ad238bdf3d9277c9fd167229958d4d8027b7f198389964c91a202

SHA512
3fc2bc30ed9910b3bbcfbb6ad62fa70f11df7e15d2c1f7e7bf8ec328f04cd7434bd45197b4792496619ecde45495607d6b11b958011664cc0246d399fd3772d5

Download Submit
memory/1792-0-0x0000000000C70000-0x0000000000CC6000-memory.dmp

Filesize
344KB

Download
memory/1792-1-0x00007FF849CA3000-0x00007FF849CA5000-memory.dmp

Filesize
8KB

Download
memory/1792-6-0x00007FF849CA0000-0x00007FF84A761000-memory.dmp

Filesize
10.8MB

Download
memory/1792-7-0x00007FF849CA3000-0x00007FF849CA5000-memory.dmp

Filesize
8KB

Download
memory/1792-8-0x00007FF849CA0000-0x00007FF84A761000-memory.dmp

Filesize
10.8MB

Download
memory/4336-11-0x00007FF849CA0000-0x00007FF84A761000-memory.dmp

Filesize
10.8MB

Download
memory/4336-13-0x00007FF849CA0000-0x00007FF84A761000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads