xworm | 37df6c75773a17be3487e82ca20139252d7c5ca15e0cc4fd08a0b93ae87adbd3

General

Target

37df6c75773a17be3487e82ca20139252d7c5ca15e0cc4fd08a0b93ae87adbd3.exe
Size

52KB
MD5

02279d272e81a497330f22cfa866dc54
SHA1

11228964549687fcabdc66a3059cd75fcf18bdcd
SHA256

37df6c75773a17be3487e82ca20139252d7c5ca15e0cc4fd08a0b93ae87adbd3
SHA512

9eff45b22dadec11c640f97d994d6e744aa17f9fb8131eecfdf431a6e2cb18f7b9e1eb29717377430c4c7c48a71ba2ef0afc7c55eea7974b2d46372ccb2c9f67
SSDEEP

1536:cpHDSBc87/UWF70l/Crbi/OZu71Omwkn2OBCyO:cYW8rHF70l/Ybi/HOt+fTO

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:8848

u-football.gl.at.ply.gg:8848

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral1/memory/2508-1-0x0000000001230000-0x0000000001244000-memory.dmp	family_xworm
behavioral1/files/0x0007000000012117-11.dat	family_xworm
behavioral1/memory/2812-13-0x0000000000CA0000-0x0000000000CB4000-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 created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	37df6c75773a17be3487e82ca20139252d7c5ca15e0cc4fd08a0b93ae87adbd3.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	37df6c75773a17be3487e82ca20139252d7c5ca15e0cc4fd08a0b93ae87adbd3.exe

Executes dropped EXE 1 IoCs

pid	Process
2812	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-1-5-21-2872745919-2748461613-2989606286-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	37df6c75773a17be3487e82ca20139252d7c5ca15e0cc4fd08a0b93ae87adbd3.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
2704	schtasks.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2508	37df6c75773a17be3487e82ca20139252d7c5ca15e0cc4fd08a0b93ae87adbd3.exe
Token: SeDebugPrivilege	2508	37df6c75773a17be3487e82ca20139252d7c5ca15e0cc4fd08a0b93ae87adbd3.exe
Token: SeDebugPrivilege	2812	XClient.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2508 wrote to memory of 2704	2508	37df6c75773a17be3487e82ca20139252d7c5ca15e0cc4fd08a0b93ae87adbd3.exe	31
PID 2508 wrote to memory of 2704	2508	37df6c75773a17be3487e82ca20139252d7c5ca15e0cc4fd08a0b93ae87adbd3.exe	31
PID 2508 wrote to memory of 2704	2508	37df6c75773a17be3487e82ca20139252d7c5ca15e0cc4fd08a0b93ae87adbd3.exe	31
PID 2156 wrote to memory of 2812	2156	taskeng.exe	35
PID 2156 wrote to memory of 2812	2156	taskeng.exe	35
PID 2156 wrote to memory of 2812	2156	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\37df6c75773a17be3487e82ca20139252d7c5ca15e0cc4fd08a0b93ae87adbd3.exe
"C:\Users\Admin\AppData\Local\Temp\37df6c75773a17be3487e82ca20139252d7c5ca15e0cc4fd08a0b93ae87adbd3.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2508
- 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:2704

C:\Windows\system32\taskeng.exe
taskeng.exe {4DE34E0B-F0C5-439C-A61B-C05FDE05B9E9} S-1-5-21-2872745919-2748461613-2989606286-1000:CCJBVTGQ\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2156
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2812

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
52KB

MD5
02279d272e81a497330f22cfa866dc54

SHA1
11228964549687fcabdc66a3059cd75fcf18bdcd

SHA256
37df6c75773a17be3487e82ca20139252d7c5ca15e0cc4fd08a0b93ae87adbd3

SHA512
9eff45b22dadec11c640f97d994d6e744aa17f9fb8131eecfdf431a6e2cb18f7b9e1eb29717377430c4c7c48a71ba2ef0afc7c55eea7974b2d46372ccb2c9f67

Download Submit
memory/2508-0-0x000007FEF4FC3000-0x000007FEF4FC4000-memory.dmp

Filesize
4KB

Download
memory/2508-1-0x0000000001230000-0x0000000001244000-memory.dmp

Filesize
80KB

Download
memory/2508-2-0x000007FEF4FC0000-0x000007FEF59AC000-memory.dmp

Filesize
9.9MB

Download
memory/2508-7-0x000007FEF4FC3000-0x000007FEF4FC4000-memory.dmp

Filesize
4KB

Download
memory/2508-8-0x000007FEF4FC0000-0x000007FEF59AC000-memory.dmp

Filesize
9.9MB

Download
memory/2812-13-0x0000000000CA0000-0x0000000000CB4000-memory.dmp

Filesize
80KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads