xworm | d4ae56389e82b76f708e7f780fef44c79ee1b61f3512485497c3ff6ae904b53c

General

Target

Dragon.exe
Size

245KB
MD5

76a7bd2d8ea94e81708a658e920f39c0
SHA1

ebb33983cedaa020d38e4b98c613a36549ba0580
SHA256

d4ae56389e82b76f708e7f780fef44c79ee1b61f3512485497c3ff6ae904b53c
SHA512

f914cfdd8a616bc4721dbfb2890fdfe0b2caf08b0fe8fe1070556f3bca4ff8d871d86e80e281dbcb090e1c43c1032a060059d2c6961540e6e8837d098991b072
SSDEEP

3072:JS1FQCCxoPKtfLnvjKP60cq/ehN8zuUQr2jRIpzgD7ZKDwodfKdM9:JsE6CBj1UQr2jf3ZKswU

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

ensure-manual.gl.at.ply.gg:41199

Mutex

ZtTzf8WYbWwk3j1n

Attributes

Install_directory
%AppData%
install_file
dllhost.exe

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/files/0x000600000004475b-6.dat	family_xworm
behavioral1/memory/4448-21-0x00000000005F0000-0x0000000000600000-memory.dmp	family_xworm

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

Checks computer location settings 2 TTPs 2 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-1-5-21-87863914-780023816-688321450-1000\Control Panel\International\Geo\Nation	Dragon.exe
Key value queried	\REGISTRY\USER\S-1-5-21-87863914-780023816-688321450-1000\Control Panel\International\Geo\Nation	dllhost.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 4 IoCs

pid	Process
4448	dllhost.exe
656	dllhost.exe
4464	dllhost.exe
3472	dllhost.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-1-5-21-87863914-780023816-688321450-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dllhost = "C:\\Users\\Admin\\AppData\\Roaming\\dllhost.exe"	dllhost.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
4140	schtasks.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	4448	dllhost.exe
Token: SeDebugPrivilege	656	dllhost.exe
Token: SeDebugPrivilege	4464	dllhost.exe
Token: SeDebugPrivilege	3472	dllhost.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1776 wrote to memory of 4448	1776	Dragon.exe	81
PID 1776 wrote to memory of 4448	1776	Dragon.exe	81
PID 1776 wrote to memory of 2764	1776	Dragon.exe	82
PID 1776 wrote to memory of 2764	1776	Dragon.exe	82
PID 2764 wrote to memory of 1016	2764	cmd.exe	84
PID 2764 wrote to memory of 1016	2764	cmd.exe	84
PID 4448 wrote to memory of 4140	4448	dllhost.exe	88
PID 4448 wrote to memory of 4140	4448	dllhost.exe	88

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\Dragon.exe
"C:\Users\Admin\AppData\Local\Temp\Dragon.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1776
- C:\Users\Admin\AppData\Roaming\dllhost.exe
  "C:\Users\Admin\AppData\Roaming\dllhost.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4448
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "dllhost" /tr "C:\Users\Admin\AppData\Roaming\dllhost.exe"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4140
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\dragon.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2764
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:1016

C:\Users\Admin\AppData\Roaming\dllhost.exe
"C:\Users\Admin\AppData\Roaming\dllhost.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:656

C:\Users\Admin\AppData\Roaming\dllhost.exe
"C:\Users\Admin\AppData\Roaming\dllhost.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4464

C:\Users\Admin\AppData\Roaming\dllhost.exe
"C:\Users\Admin\AppData\Roaming\dllhost.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3472

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\dllhost.exe.log

Filesize
654B

MD5
11c6e74f0561678d2cf7fc075a6cc00c

SHA1
535ee79ba978554abcb98c566235805e7ea18490

SHA256
d39a78fabca39532fcb85ce908781a75132e1bd01cc50a3b290dd87127837d63

SHA512
32c63d67bf512b42e7f57f71287b354200126cb417ef9d869c72e0b9388a7c2f5e3b61f303f1353baa1bf482d0f17e06e23c9f50b2f1babd4d958b6da19c40b0

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

Filesize
35KB

MD5
dfe1a183698d916bb80a2b3f5e16b146

SHA1
75d97ebebbf43679de5b14e4d3be23d22a09ba21

SHA256
a2cc98c332e44b73a8737a390dfeaaa17b08adaec271ba6d64eb2bf4c8cc5d18

SHA512
2e67e15d4ad7c0c233021770de96a3cf6c95a22bed89fd31f0a872266f34a4cb3d41872de61bd929964b63170a5db5663e778a96d045b2723edce648bb750970

Download Submit
C:\Users\Admin\AppData\Roaming\dragon.bat

Filesize
2KB

MD5
b942ff88a54c0d0777addfb9b1d93f3e

SHA1
e8c800e0bca11c9c55f18e48be769a550be7840b

SHA256
45db70e76ba8e7d6e12ac548be6575757d43c56d78dbd0e3497f2b5c20c21979

SHA512
c707fa393917e21df77fc5147f39ac0d1a2d12479cc2752f4e3022308f4b079329271b2cbe6c0a00e15fa46561730a8c34bf472630b26d7ca1cd7e834b416aa2

Download Submit
memory/1776-0-0x00007FF8F3553000-0x00007FF8F3555000-memory.dmp

Filesize
8KB

Download
memory/1776-1-0x0000000000970000-0x00000000009B2000-memory.dmp

Filesize
264KB

Download
memory/4448-21-0x00000000005F0000-0x0000000000600000-memory.dmp

Filesize
64KB

Download
memory/4448-24-0x00007FF8F3550000-0x00007FF8F4012000-memory.dmp

Filesize
10.8MB

Download
memory/4448-27-0x00007FF8F3550000-0x00007FF8F4012000-memory.dmp

Filesize
10.8MB

Download
memory/4448-28-0x00007FF8F3550000-0x00007FF8F4012000-memory.dmp

Filesize
10.8MB

Download
memory/4448-30-0x00007FF8F3550000-0x00007FF8F4012000-memory.dmp

Filesize
10.8MB

Download
memory/4448-31-0x000000001B3E0000-0x000000001B3EC000-memory.dmp

Filesize
48KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads