xworm | 1f002be3e2c89853aab023bcfac564bf6a2f0fe4d3ff936444594964413b6fba

General

Target

1f002be3e2c89853aab023bcfac564bf6a2f0fe4d3ff936444594964413b6fba.exe
Size

170KB
MD5

a805c895c507a30f12e39e04f55a7bf1
SHA1

1871cc40e2c48397f54d96d6be8fe07c0b615fa1
SHA256

1f002be3e2c89853aab023bcfac564bf6a2f0fe4d3ff936444594964413b6fba
SHA512

5b1b85a835c0d2f5253e2d421541344b1798365a8f25131f73b12df578958b257ab89d602ebff8974750dd76cf2fe5195ef9da6f7f017f180927f771121c02e1
SSDEEP

3072:T7FTPCDwNXHwR8bOH9yE8OB7SnFTM+lmsolAIrRuw+mqv9j1MWLQM:T7FTaDwRk8b09N/7S4+lDAA

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:1234

143.198.208.124:1234

Attributes

Install_directory
%Temp%
install_file
XClient.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/2512-1-0x0000000000800000-0x0000000000830000-memory.dmp	family_xworm
behavioral2/files/0x000b0000000233d6-9.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-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\International\Geo\Nation	1f002be3e2c89853aab023bcfac564bf6a2f0fe4d3ff936444594964413b6fba.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	1f002be3e2c89853aab023bcfac564bf6a2f0fe4d3ff936444594964413b6fba.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	1f002be3e2c89853aab023bcfac564bf6a2f0fe4d3ff936444594964413b6fba.exe

Executes dropped EXE 2 IoCs

pid	Process
1116	XClient.exe
1596	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-1-5-21-2718105630-359604950-2820636825-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Local\\Temp\\XClient.exe"	1f002be3e2c89853aab023bcfac564bf6a2f0fe4d3ff936444594964413b6fba.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
27	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
3356	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2512	1f002be3e2c89853aab023bcfac564bf6a2f0fe4d3ff936444594964413b6fba.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2512	1f002be3e2c89853aab023bcfac564bf6a2f0fe4d3ff936444594964413b6fba.exe
Token: SeDebugPrivilege	2512	1f002be3e2c89853aab023bcfac564bf6a2f0fe4d3ff936444594964413b6fba.exe
Token: SeDebugPrivilege	1116	XClient.exe
Token: SeDebugPrivilege	1596	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2512	1f002be3e2c89853aab023bcfac564bf6a2f0fe4d3ff936444594964413b6fba.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 2512 wrote to memory of 3356	2512	1f002be3e2c89853aab023bcfac564bf6a2f0fe4d3ff936444594964413b6fba.exe	92
PID 2512 wrote to memory of 3356	2512	1f002be3e2c89853aab023bcfac564bf6a2f0fe4d3ff936444594964413b6fba.exe	92

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\1f002be3e2c89853aab023bcfac564bf6a2f0fe4d3ff936444594964413b6fba.exe
"C:\Users\Admin\AppData\Local\Temp\1f002be3e2c89853aab023bcfac564bf6a2f0fe4d3ff936444594964413b6fba.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:2512
- 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\Local\Temp\XClient.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3356

C:\Users\Admin\AppData\Local\Temp\XClient.exe
C:\Users\Admin\AppData\Local\Temp\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1116

C:\Users\Admin\AppData\Local\Temp\XClient.exe
C:\Users\Admin\AppData\Local\Temp\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1596

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\Local\Temp\XClient.exe

Filesize
170KB

MD5
a805c895c507a30f12e39e04f55a7bf1

SHA1
1871cc40e2c48397f54d96d6be8fe07c0b615fa1

SHA256
1f002be3e2c89853aab023bcfac564bf6a2f0fe4d3ff936444594964413b6fba

SHA512
5b1b85a835c0d2f5253e2d421541344b1798365a8f25131f73b12df578958b257ab89d602ebff8974750dd76cf2fe5195ef9da6f7f017f180927f771121c02e1

Download Submit
memory/1116-11-0x00007FFC72B70000-0x00007FFC73631000-memory.dmp

Filesize
10.8MB

Download
memory/1116-13-0x00007FFC72B70000-0x00007FFC73631000-memory.dmp

Filesize
10.8MB

Download
memory/2512-0-0x00007FFC72B73000-0x00007FFC72B75000-memory.dmp

Filesize
8KB

Download
memory/2512-1-0x0000000000800000-0x0000000000830000-memory.dmp

Filesize
192KB

Download
memory/2512-2-0x00007FFC72B70000-0x00007FFC73631000-memory.dmp

Filesize
10.8MB

Download
memory/2512-7-0x00007FFC72B73000-0x00007FFC72B75000-memory.dmp

Filesize
8KB

Download
memory/2512-8-0x00007FFC72B70000-0x00007FFC73631000-memory.dmp

Filesize
10.8MB

Download
memory/2512-14-0x00000000010E0000-0x00000000010EC000-memory.dmp

Filesize
48KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads