xworm | fc7e51dc0cdfe45ed4507903bbb9d8442d58dff88ceec8f89ffb354646a2b0c2

General

Target

XClient.exe
Size

69KB
MD5

5f73a7d813ca1b0287eee8e34c8fb97a
SHA1

2a209a47e6ca2106397aac89674344761f507842
SHA256

fc7e51dc0cdfe45ed4507903bbb9d8442d58dff88ceec8f89ffb354646a2b0c2
SHA512

9b86f653e162bc632f6288fee4072aea6c3299e744db9f4707fa0f5c51ddb3c7e4aae21c7cf3c9d480ad375c51e4de15de1161a69459a74133f7d1f005796143
SSDEEP

1536:etpR0NcUa78F6TflB1Um7UG2RbqV9R0nXBHykd19jO7XHb:etn0b6TfysUpRbOsRbvjOLHb

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

6.tcp.ngrok.io:17720:17720

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/memory/2144-1-0x0000000000C10000-0x0000000000C28000-memory.dmp	family_xworm
behavioral1/files/0x000c000000012268-10.dat	family_xworm
behavioral1/memory/2244-12-0x00000000003F0000-0x0000000000408000-memory.dmp	family_xworm
behavioral1/memory/1136-15-0x00000000000F0000-0x0000000000108000-memory.dmp	family_xworm

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

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
2244	XClient.exe
1136	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-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	XClient.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
2948	schtasks.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2144	XClient.exe
Token: SeDebugPrivilege	2244	XClient.exe
Token: SeDebugPrivilege	1136	XClient.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2144 wrote to memory of 2948	2144	XClient.exe	30
PID 2144 wrote to memory of 2948	2144	XClient.exe	30
PID 2144 wrote to memory of 2948	2144	XClient.exe	30
PID 2620 wrote to memory of 2244	2620	taskeng.exe	33
PID 2620 wrote to memory of 2244	2620	taskeng.exe	33
PID 2620 wrote to memory of 2244	2620	taskeng.exe	33
PID 2620 wrote to memory of 1136	2620	taskeng.exe	35
PID 2620 wrote to memory of 1136	2620	taskeng.exe	35
PID 2620 wrote to memory of 1136	2620	taskeng.exe	35

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⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2144
- 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:2948

C:\Windows\system32\taskeng.exe
taskeng.exe {123C4C33-7472-412B-A4B1-30849C5251DF} S-1-5-21-1846800975-3917212583-2893086201-1000:ZQABOPWE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2620
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2244
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1136

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

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\XClient.exe

Filesize
69KB

MD5
5f73a7d813ca1b0287eee8e34c8fb97a

SHA1
2a209a47e6ca2106397aac89674344761f507842

SHA256
fc7e51dc0cdfe45ed4507903bbb9d8442d58dff88ceec8f89ffb354646a2b0c2

SHA512
9b86f653e162bc632f6288fee4072aea6c3299e744db9f4707fa0f5c51ddb3c7e4aae21c7cf3c9d480ad375c51e4de15de1161a69459a74133f7d1f005796143

Download Submit
memory/1136-15-0x00000000000F0000-0x0000000000108000-memory.dmp

Filesize
96KB

Download
memory/2144-0-0x000007FEF6123000-0x000007FEF6124000-memory.dmp

Filesize
4KB

Download
memory/2144-1-0x0000000000C10000-0x0000000000C28000-memory.dmp

Filesize
96KB

Download
memory/2144-6-0x000007FEF6120000-0x000007FEF6B0C000-memory.dmp

Filesize
9.9MB

Download
memory/2144-7-0x000007FEF6123000-0x000007FEF6124000-memory.dmp

Filesize
4KB

Download
memory/2144-8-0x000007FEF6120000-0x000007FEF6B0C000-memory.dmp

Filesize
9.9MB

Download
memory/2244-12-0x00000000003F0000-0x0000000000408000-memory.dmp

Filesize
96KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads