xworm | cffb99ed02ab35145c3ddc5e66f7f24b58d1a0e7714475f0370f71b9c51603c0

General

Target

cffb99ed02ab35145c3ddc5e66f7f24b58d1a0e7714475f0370f71b9c51603c0.exe
Size

1.1MB
MD5

c55c58e7938f01efa7800a4f3a649610
SHA1

ca995f8eee73f04bc8f5f3e8fc4bd470a8020524
SHA256

cffb99ed02ab35145c3ddc5e66f7f24b58d1a0e7714475f0370f71b9c51603c0
SHA512

1a8dc3ae6e86b8da13b8aab1743859c41b21d94f7c384a60d7bf7653f42d60717f84770b337c58438ddbe5e399cd37cee94ca013ca06d3979358bdba28439ed8
SSDEEP

24576:21qZoJIBlbtSwSu+BKDCIKAn0xHGVk2dkwbMy56yleaixn+mfiPhr8vg8/Bq:BWIpskZqGDRMMl2xn3iS7/o

Score

10^/10

xworm discovery execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:7777

door-predict.gl.at.ply.gg:7777

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000500000001e64b-31.dat	family_xworm
behavioral2/memory/1112-40-0x0000000000130000-0x0000000000146000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
xworm

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2060	powershell.exe

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-1-5-21-1161330783-2912525651-1278508834-1000\Control Panel\International\Geo\Nation	cffb99ed02ab35145c3ddc5e66f7f24b58d1a0e7714475f0370f71b9c51603c0.exe

Executes dropped EXE 2 IoCs

pid	Process
4892	fatality.exe
1112	security.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-1-5-21-1161330783-2912525651-1278508834-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\security = "C:\\Users\\Admin\\AppData\\Local\\Temp\\security.exe"	cffb99ed02ab35145c3ddc5e66f7f24b58d1a0e7714475f0370f71b9c51603c0.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
26	ip-api.com

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fatality.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2060	powershell.exe
2060	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2060	powershell.exe
Token: SeDebugPrivilege	1112	security.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 3428 wrote to memory of 4892	3428	cffb99ed02ab35145c3ddc5e66f7f24b58d1a0e7714475f0370f71b9c51603c0.exe	89
PID 3428 wrote to memory of 4892	3428	cffb99ed02ab35145c3ddc5e66f7f24b58d1a0e7714475f0370f71b9c51603c0.exe	89
PID 3428 wrote to memory of 4892	3428	cffb99ed02ab35145c3ddc5e66f7f24b58d1a0e7714475f0370f71b9c51603c0.exe	89
PID 3428 wrote to memory of 2060	3428	cffb99ed02ab35145c3ddc5e66f7f24b58d1a0e7714475f0370f71b9c51603c0.exe	90
PID 3428 wrote to memory of 2060	3428	cffb99ed02ab35145c3ddc5e66f7f24b58d1a0e7714475f0370f71b9c51603c0.exe	90
PID 3428 wrote to memory of 1112	3428	cffb99ed02ab35145c3ddc5e66f7f24b58d1a0e7714475f0370f71b9c51603c0.exe	96
PID 3428 wrote to memory of 1112	3428	cffb99ed02ab35145c3ddc5e66f7f24b58d1a0e7714475f0370f71b9c51603c0.exe	96

C:\Users\Admin\AppData\Local\Temp\cffb99ed02ab35145c3ddc5e66f7f24b58d1a0e7714475f0370f71b9c51603c0.exe
"C:\Users\Admin\AppData\Local\Temp\cffb99ed02ab35145c3ddc5e66f7f24b58d1a0e7714475f0370f71b9c51603c0.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:3428
- C:\Users\Admin\AppData\Local\Temp\fatality.exe
  "C:\Users\Admin\AppData\Local\Temp\fatality.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:4892
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\security.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2060
- C:\Users\Admin\AppData\Local\Temp\security.exe
  "C:\Users\Admin\AppData\Local\Temp\security.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1112

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_5rl0co4d.52b.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\fatality.exe

Filesize
2.0MB

MD5
b5ae62edbf81a0dec30fedcc6d136245

SHA1
9f89cca56f20cb73503e068f5bb115fdda0cf272

SHA256
5cd7137393dddb5cd41a55429871f443dcf6c2791eeaaade4fdb43f7a07c8865

SHA512
3e525757ca541897e3766f73e53f21ac4ba1147ee33cc5df2117131808de8e6a3c576d8799e22dc3c76afe163102cc8517a3834388c1f06365e892a389166cc7

Download Submit
C:\Users\Admin\AppData\Local\Temp\security.exe

Filesize
63KB

MD5
f329b3a2d6b8a4688e82ffe1c491b2ab

SHA1
d06cab7d0ce6970807574569f4a3896ddd3d9ee7

SHA256
e8b6648a1f94b9a9ea1d67db82812f08f5aaa7fd220d5574ba7e9e14dbcb06a0

SHA512
cdc3056d11cfa9f34beee2a83dd861074076fec47e9b8a30a0e01eb92ee0ccca6b8376d58e578c15de720e5ea745da9fddbd3b0380995b237ad21a4dc1651dc6

Download Submit
memory/1112-40-0x0000000000130000-0x0000000000146000-memory.dmp

Filesize
88KB

Download
memory/2060-12-0x000001636FF00000-0x000001636FF22000-memory.dmp

Filesize
136KB

Download
memory/2060-11-0x00007FF9B1E00000-0x00007FF9B28C1000-memory.dmp

Filesize
10.8MB

Download
memory/2060-22-0x00007FF9B1E00000-0x00007FF9B28C1000-memory.dmp

Filesize
10.8MB

Download
memory/2060-23-0x00007FF9B1E00000-0x00007FF9B28C1000-memory.dmp

Filesize
10.8MB

Download
memory/2060-26-0x00007FF9B1E00000-0x00007FF9B28C1000-memory.dmp

Filesize
10.8MB

Download
memory/3428-0-0x00007FF9B1E03000-0x00007FF9B1E05000-memory.dmp

Filesize
8KB

Download
memory/3428-3-0x00007FF9B1E00000-0x00007FF9B28C1000-memory.dmp

Filesize
10.8MB

Download
memory/3428-39-0x00007FF9B1E00000-0x00007FF9B28C1000-memory.dmp

Filesize
10.8MB

Download
memory/3428-1-0x0000000000E00000-0x0000000000F22000-memory.dmp

Filesize
1.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads