xworm | b280b6c393aa68413403f049e84e020ed7ba360bcf27a751bebc43cf5da5aa4c

General

Target

b280b6c393aa68413403f049e84e020ed7ba360bcf27a751bebc43cf5da5aa4c.exe
Size

234KB
MD5

1927a5f9c4dc9980fa675135dc4c657d
SHA1

539199552b8d801266a0d9110af1e7382d6b6b50
SHA256

b280b6c393aa68413403f049e84e020ed7ba360bcf27a751bebc43cf5da5aa4c
SHA512

7922a65ffe9883c2d621318e748efd02f5fe49200ccf66143d5363b21c1ee43260391443dc8b8cc850b893dcdb0abffa52e86c9f396e2867a3bd3816f45364ef
SSDEEP

6144:JNVsqclbIlOsUhcX7elbKTuq9bfF/H9d9n:JNiqGs3X3uO

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

est-review.gl.at.ply.gg:23712

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/3672-1-0x00000000008F0000-0x0000000000930000-memory.dmp	family_xworm
behavioral2/files/0x000800000001e104-7.dat	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
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-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	b280b6c393aa68413403f049e84e020ed7ba360bcf27a751bebc43cf5da5aa4c.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	b280b6c393aa68413403f049e84e020ed7ba360bcf27a751bebc43cf5da5aa4c.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	b280b6c393aa68413403f049e84e020ed7ba360bcf27a751bebc43cf5da5aa4c.exe

Executes dropped EXE 3 IoCs

pid	Process
3964	XClient.exe
4392	XClient.exe
5116	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-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	b280b6c393aa68413403f049e84e020ed7ba360bcf27a751bebc43cf5da5aa4c.exe

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
5112	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
3672	b280b6c393aa68413403f049e84e020ed7ba360bcf27a751bebc43cf5da5aa4c.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	3672	b280b6c393aa68413403f049e84e020ed7ba360bcf27a751bebc43cf5da5aa4c.exe
Token: SeDebugPrivilege	3672	b280b6c393aa68413403f049e84e020ed7ba360bcf27a751bebc43cf5da5aa4c.exe
Token: SeDebugPrivilege	3964	XClient.exe
Token: SeDebugPrivilege	4392	XClient.exe
Token: SeDebugPrivilege	5116	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3672	b280b6c393aa68413403f049e84e020ed7ba360bcf27a751bebc43cf5da5aa4c.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3672 wrote to memory of 5112	3672	b280b6c393aa68413403f049e84e020ed7ba360bcf27a751bebc43cf5da5aa4c.exe	84
PID 3672 wrote to memory of 5112	3672	b280b6c393aa68413403f049e84e020ed7ba360bcf27a751bebc43cf5da5aa4c.exe	84

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\b280b6c393aa68413403f049e84e020ed7ba360bcf27a751bebc43cf5da5aa4c.exe
"C:\Users\Admin\AppData\Local\Temp\b280b6c393aa68413403f049e84e020ed7ba360bcf27a751bebc43cf5da5aa4c.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:3672
- 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:5112

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3964

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4392

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:5116

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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\Roaming\XClient.exe

Filesize
234KB

MD5
1927a5f9c4dc9980fa675135dc4c657d

SHA1
539199552b8d801266a0d9110af1e7382d6b6b50

SHA256
b280b6c393aa68413403f049e84e020ed7ba360bcf27a751bebc43cf5da5aa4c

SHA512
7922a65ffe9883c2d621318e748efd02f5fe49200ccf66143d5363b21c1ee43260391443dc8b8cc850b893dcdb0abffa52e86c9f396e2867a3bd3816f45364ef

Download Submit
memory/3672-0-0x00007FFA48873000-0x00007FFA48875000-memory.dmp

Filesize
8KB

Download
memory/3672-1-0x00000000008F0000-0x0000000000930000-memory.dmp

Filesize
256KB

Download
memory/3672-6-0x00007FFA48870000-0x00007FFA49331000-memory.dmp

Filesize
10.8MB

Download
memory/3672-10-0x00007FFA48873000-0x00007FFA48875000-memory.dmp

Filesize
8KB

Download
memory/3672-13-0x00007FFA48870000-0x00007FFA49331000-memory.dmp

Filesize
10.8MB

Download
memory/3964-9-0x00007FFA48870000-0x00007FFA49331000-memory.dmp

Filesize
10.8MB

Download
memory/3964-12-0x00007FFA48870000-0x00007FFA49331000-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