xworm | 20ba1d60db4e5d51a698d7ab07e8a5dd75cd6aaae792c76dda315d757b9dfdde

General

Target

Gorilla tag.exe
Size

429KB
MD5

a47502d0bdaa67d14c762565ee7864d6
SHA1

afed9a6ac84e97bbd2dc2593ff6204716e696695
SHA256

20ba1d60db4e5d51a698d7ab07e8a5dd75cd6aaae792c76dda315d757b9dfdde
SHA512

dae6c201c878da5438a58bc6258cb7287ddfbf002c01c0a13deb4039a4fe5e8a85be04c57367f56de4ac26ae0a3fb0d166b27e06de354bf3b2efd38af5c636e9
SSDEEP

6144:BkGb8qJ+GIIIIIIIhIIIIIIIIIIIIIIIUz9bfF/H9d9n:BRC9

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

est-review.gl.at.ply.gg:21148

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral1/memory/3016-1-0x0000000000F50000-0x0000000000FC2000-memory.dmp	family_xworm
behavioral1/files/0x0030000000016d1c-9.dat	family_xworm
behavioral1/memory/2744-11-0x00000000012D0000-0x0000000001342000-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	Gorilla tag.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	Gorilla tag.exe

Executes dropped EXE 3 IoCs

pid	Process
2744	XClient.exe
1560	XClient.exe
2380	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-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	Gorilla tag.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
2876	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
3016	Gorilla tag.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	3016	Gorilla tag.exe
Token: SeDebugPrivilege	3016	Gorilla tag.exe
Token: SeDebugPrivilege	2744	XClient.exe
Token: SeDebugPrivilege	1560	XClient.exe
Token: SeDebugPrivilege	2380	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3016	Gorilla tag.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3016 wrote to memory of 2876	3016	Gorilla tag.exe	29
PID 3016 wrote to memory of 2876	3016	Gorilla tag.exe	29
PID 3016 wrote to memory of 2876	3016	Gorilla tag.exe	29
PID 1796 wrote to memory of 2744	1796	taskeng.exe	33
PID 1796 wrote to memory of 2744	1796	taskeng.exe	33
PID 1796 wrote to memory of 2744	1796	taskeng.exe	33
PID 1796 wrote to memory of 1560	1796	taskeng.exe	34
PID 1796 wrote to memory of 1560	1796	taskeng.exe	34
PID 1796 wrote to memory of 1560	1796	taskeng.exe	34
PID 1796 wrote to memory of 2380	1796	taskeng.exe	35
PID 1796 wrote to memory of 2380	1796	taskeng.exe	35
PID 1796 wrote to memory of 2380	1796	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\Gorilla tag.exe
"C:\Users\Admin\AppData\Local\Temp\Gorilla tag.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:3016
- 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:2876

C:\Windows\system32\taskeng.exe
taskeng.exe {EFBBF0D6-DE23-4030-BD87-842AAC65556C} S-1-5-21-3692679935-4019334568-335155002-1000:BCXRJFKE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1796
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2744
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1560
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2380

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
429KB

MD5
a47502d0bdaa67d14c762565ee7864d6

SHA1
afed9a6ac84e97bbd2dc2593ff6204716e696695

SHA256
20ba1d60db4e5d51a698d7ab07e8a5dd75cd6aaae792c76dda315d757b9dfdde

SHA512
dae6c201c878da5438a58bc6258cb7287ddfbf002c01c0a13deb4039a4fe5e8a85be04c57367f56de4ac26ae0a3fb0d166b27e06de354bf3b2efd38af5c636e9

Download Submit
memory/2744-11-0x00000000012D0000-0x0000000001342000-memory.dmp

Filesize
456KB

Download
memory/3016-0-0x000007FEF5A73000-0x000007FEF5A74000-memory.dmp

Filesize
4KB

Download
memory/3016-1-0x0000000000F50000-0x0000000000FC2000-memory.dmp

Filesize
456KB

Download
memory/3016-6-0x000007FEF5A70000-0x000007FEF645C000-memory.dmp

Filesize
9.9MB

Download
memory/3016-7-0x000007FEF5A73000-0x000007FEF5A74000-memory.dmp

Filesize
4KB

Download
memory/3016-12-0x000007FEF5A70000-0x000007FEF645C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads