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 2 IoCs

resource	yara_rule
behavioral2/memory/4456-1-0x0000000000A30000-0x0000000000A8A000-memory.dmp	family_xworm
behavioral2/files/0x000b000000023b7e-9.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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	56cea41d758ebbd2c0eff413a0e86a5e55628d9492baa8333dccef3bcd8f9abe.exe

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
3244	Steam.exe
4184	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-1-5-21-3442511616-637977696-3186306149-1000\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
5	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
3788	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
4456	56cea41d758ebbd2c0eff413a0e86a5e55628d9492baa8333dccef3bcd8f9abe.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	4456	56cea41d758ebbd2c0eff413a0e86a5e55628d9492baa8333dccef3bcd8f9abe.exe
Token: SeDebugPrivilege	4456	56cea41d758ebbd2c0eff413a0e86a5e55628d9492baa8333dccef3bcd8f9abe.exe
Token: SeDebugPrivilege	3244	Steam.exe
Token: SeDebugPrivilege	4184	Steam.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4456	56cea41d758ebbd2c0eff413a0e86a5e55628d9492baa8333dccef3bcd8f9abe.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4456 wrote to memory of 3788	4456	56cea41d758ebbd2c0eff413a0e86a5e55628d9492baa8333dccef3bcd8f9abe.exe	83
PID 4456 wrote to memory of 3788	4456	56cea41d758ebbd2c0eff413a0e86a5e55628d9492baa8333dccef3bcd8f9abe.exe	83

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⤵
- 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:4456
- 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:3788

C:\Users\Admin\AppData\Roaming\Steam.exe
C:\Users\Admin\AppData\Roaming\Steam.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3244

C:\Users\Admin\AppData\Roaming\Steam.exe
C:\Users\Admin\AppData\Roaming\Steam.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4184

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\Steam.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
C:\Users\Admin\AppData\Roaming\Steam.exe

Filesize
338KB

MD5
79c26f88c7aa627c855d1e03e64d60ef

SHA1
feee99600140106abf02f72dba575697cc2962ed

SHA256
56cea41d758ebbd2c0eff413a0e86a5e55628d9492baa8333dccef3bcd8f9abe

SHA512
803db4811c0d1ab21efe9be8a5a371a49739ad22f08d8775081f243369ccb1fea2b03e435fc55c5e4af35d3a85a578a2ae435145fc2430229cb0c87fbde7037e

Download Submit
memory/3244-11-0x00007FFF703D0000-0x00007FFF70E91000-memory.dmp

Filesize
10.8MB

Download
memory/3244-13-0x00007FFF703D0000-0x00007FFF70E91000-memory.dmp

Filesize
10.8MB

Download
memory/4456-0-0x00007FFF703D3000-0x00007FFF703D5000-memory.dmp

Filesize
8KB

Download
memory/4456-1-0x0000000000A30000-0x0000000000A8A000-memory.dmp

Filesize
360KB

Download
memory/4456-2-0x00007FFF703D0000-0x00007FFF70E91000-memory.dmp

Filesize
10.8MB

Download
memory/4456-7-0x00007FFF703D3000-0x00007FFF703D5000-memory.dmp

Filesize
8KB

Download
memory/4456-8-0x00007FFF703D0000-0x00007FFF70E91000-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