xworm | 56cea41d758ebbd2c0eff413a0e86a5e55628d9492baa8333dccef3bcd8f9abe

General

Target

56cea41d758ebbd2c0eff413a0e86a5e55628d9492baa8333dccef3bcd8f9abe.exe
Size

338KB
MD5

79c26f88c7aa627c855d1e03e64d60ef
SHA1

feee99600140106abf02f72dba575697cc2962ed
SHA256

56cea41d758ebbd2c0eff413a0e86a5e55628d9492baa8333dccef3bcd8f9abe
SHA512

803db4811c0d1ab21efe9be8a5a371a49739ad22f08d8775081f243369ccb1fea2b03e435fc55c5e4af35d3a85a578a2ae435145fc2430229cb0c87fbde7037e
SSDEEP

6144:D0hebksv2+GIIIIIIIhIIIIIIIIIIIIIIIU:D0hPsvh

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

147.185.221.24:40432

Attributes

Install_directory
%AppData%
install_file
Steam.exe

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral1/memory/2408-1-0x00000000003B0000-0x000000000040A000-memory.dmp	family_xworm
behavioral1/files/0x000900000001755b-11.dat	family_xworm
behavioral1/memory/2772-12-0x0000000001300000-0x000000000135A000-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\Steam.lnk	56cea41d758ebbd2c0eff413a0e86a5e55628d9492baa8333dccef3bcd8f9abe.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Steam.lnk	56cea41d758ebbd2c0eff413a0e86a5e55628d9492baa8333dccef3bcd8f9abe.exe

Executes dropped EXE 2 IoCs

pid	Process
2772	Steam.exe
1932	Steam.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-1-5-21-1163522206-1469769407-485553996-1000\Software\Microsoft\Windows\CurrentVersion\Run\Steam = "C:\\Users\\Admin\\AppData\\Roaming\\Steam.exe"	56cea41d758ebbd2c0eff413a0e86a5e55628d9492baa8333dccef3bcd8f9abe.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
2800	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2408	56cea41d758ebbd2c0eff413a0e86a5e55628d9492baa8333dccef3bcd8f9abe.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2408	56cea41d758ebbd2c0eff413a0e86a5e55628d9492baa8333dccef3bcd8f9abe.exe
Token: SeDebugPrivilege	2408	56cea41d758ebbd2c0eff413a0e86a5e55628d9492baa8333dccef3bcd8f9abe.exe
Token: SeDebugPrivilege	2772	Steam.exe
Token: SeDebugPrivilege	1932	Steam.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2408	56cea41d758ebbd2c0eff413a0e86a5e55628d9492baa8333dccef3bcd8f9abe.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2408 wrote to memory of 2800	2408	56cea41d758ebbd2c0eff413a0e86a5e55628d9492baa8333dccef3bcd8f9abe.exe	32
PID 2408 wrote to memory of 2800	2408	56cea41d758ebbd2c0eff413a0e86a5e55628d9492baa8333dccef3bcd8f9abe.exe	32
PID 2408 wrote to memory of 2800	2408	56cea41d758ebbd2c0eff413a0e86a5e55628d9492baa8333dccef3bcd8f9abe.exe	32
PID 2696 wrote to memory of 2772	2696	taskeng.exe	35
PID 2696 wrote to memory of 2772	2696	taskeng.exe	35
PID 2696 wrote to memory of 2772	2696	taskeng.exe	35
PID 2696 wrote to memory of 1932	2696	taskeng.exe	36
PID 2696 wrote to memory of 1932	2696	taskeng.exe	36
PID 2696 wrote to memory of 1932	2696	taskeng.exe	36

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\56cea41d758ebbd2c0eff413a0e86a5e55628d9492baa8333dccef3bcd8f9abe.exe
"C:\Users\Admin\AppData\Local\Temp\56cea41d758ebbd2c0eff413a0e86a5e55628d9492baa8333dccef3bcd8f9abe.exe"
1⤵
- 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:2408
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Steam" /tr "C:\Users\Admin\AppData\Roaming\Steam.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2800

C:\Windows\system32\taskeng.exe
taskeng.exe {D24046A2-FC17-4002-A49D-FD8D7E006034} S-1-5-21-1163522206-1469769407-485553996-1000:PJCSDMRP\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2696
- C:\Users\Admin\AppData\Roaming\Steam.exe
  C:\Users\Admin\AppData\Roaming\Steam.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2772
- C:\Users\Admin\AppData\Roaming\Steam.exe
  C:\Users\Admin\AppData\Roaming\Steam.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1932

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\Steam.exe

Filesize
338KB

MD5
79c26f88c7aa627c855d1e03e64d60ef

SHA1
feee99600140106abf02f72dba575697cc2962ed

SHA256
56cea41d758ebbd2c0eff413a0e86a5e55628d9492baa8333dccef3bcd8f9abe

SHA512
803db4811c0d1ab21efe9be8a5a371a49739ad22f08d8775081f243369ccb1fea2b03e435fc55c5e4af35d3a85a578a2ae435145fc2430229cb0c87fbde7037e

Download Submit
memory/2408-0-0x000007FEF5E73000-0x000007FEF5E74000-memory.dmp

Filesize
4KB

Download
memory/2408-1-0x00000000003B0000-0x000000000040A000-memory.dmp

Filesize
360KB

Download
memory/2408-2-0x000007FEF5E70000-0x000007FEF685C000-memory.dmp

Filesize
9.9MB

Download
memory/2408-7-0x000007FEF5E73000-0x000007FEF5E74000-memory.dmp

Filesize
4KB

Download
memory/2408-8-0x000007FEF5E70000-0x000007FEF685C000-memory.dmp

Filesize
9.9MB

Download
memory/2772-12-0x0000000001300000-0x000000000135A000-memory.dmp

Filesize
360KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads