xworm | 14e1b5a22e7e68cfd1908bc0b7c6c7db1889c9109967bdd8fc06cd01ad3da042

General

Target

XvcClient.exe
Size

39KB
MD5

8a1f910de42bbdfc2967424952092c93
SHA1

c9eb6e94e8f11e023e524eea898c14e1084568ac
SHA256

14e1b5a22e7e68cfd1908bc0b7c6c7db1889c9109967bdd8fc06cd01ad3da042
SHA512

6c8b01d99e3a8fb4c1e4d671616abe4e523202aba8873ae2eecd92d4a5020330cdb1635344c846b8e8189fd3ecb15f98a2da907a89ab2d1ead5d14dc3af1689f
SSDEEP

768:vMi7NoXNEbgnMpOMb9anqNiAvHzFN9pPOphISv4:H7NQObjAnqNiAvTFN9pPOpjv4

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

cities-annex.gl.at.ply.gg:28648

Mutex

ZcxxP7wB83cGDNRX

Attributes

Install_directory
%Userprofile%
install_file
msconfig.exe

aes.plain

Signatures

Detect Xworm Payload 5 IoCs

resource	yara_rule
behavioral1/memory/1644-1-0x0000000000860000-0x0000000000870000-memory.dmp	family_xworm
behavioral1/files/0x0004000000004ed7-8.dat	family_xworm
behavioral1/memory/2772-10-0x0000000001010000-0x0000000001020000-memory.dmp	family_xworm
behavioral1/memory/2804-15-0x0000000000190000-0x00000000001A0000-memory.dmp	family_xworm
behavioral1/memory/952-17-0x00000000000C0000-0x00000000000D0000-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\msconfig.lnk	XvcClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\msconfig.lnk	XvcClient.exe

Executes dropped EXE 3 IoCs

pid	Process
2772	msconfig.exe
2804	msconfig.exe
952	msconfig.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-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Windows\CurrentVersion\Run\msconfig = "C:\\Users\\Admin\\msconfig.exe"	XvcClient.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
2492	schtasks.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1644	XvcClient.exe
Token: SeDebugPrivilege	2772	msconfig.exe
Token: SeDebugPrivilege	2804	msconfig.exe
Token: SeDebugPrivilege	952	msconfig.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1644 wrote to memory of 2492	1644	XvcClient.exe	31
PID 1644 wrote to memory of 2492	1644	XvcClient.exe	31
PID 1644 wrote to memory of 2492	1644	XvcClient.exe	31
PID 2272 wrote to memory of 2772	2272	taskeng.exe	34
PID 2272 wrote to memory of 2772	2272	taskeng.exe	34
PID 2272 wrote to memory of 2772	2272	taskeng.exe	34
PID 2272 wrote to memory of 2804	2272	taskeng.exe	36
PID 2272 wrote to memory of 2804	2272	taskeng.exe	36
PID 2272 wrote to memory of 2804	2272	taskeng.exe	36
PID 2272 wrote to memory of 952	2272	taskeng.exe	38
PID 2272 wrote to memory of 952	2272	taskeng.exe	38
PID 2272 wrote to memory of 952	2272	taskeng.exe	38

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\XvcClient.exe
"C:\Users\Admin\AppData\Local\Temp\XvcClient.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1644
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "msconfig" /tr "C:\Users\Admin\msconfig.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2492

C:\Windows\system32\taskeng.exe
taskeng.exe {44D6A8F4-92AF-4068-BEF8-380754A07AED} S-1-5-21-3290804112-2823094203-3137964600-1000:VORHPBAB\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2272
- C:\Users\Admin\msconfig.exe
  C:\Users\Admin\msconfig.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2772
- C:\Users\Admin\msconfig.exe
  C:\Users\Admin\msconfig.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2804
- C:\Users\Admin\msconfig.exe
  C:\Users\Admin\msconfig.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:952

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\msconfig.exe

Filesize
39KB

MD5
8a1f910de42bbdfc2967424952092c93

SHA1
c9eb6e94e8f11e023e524eea898c14e1084568ac

SHA256
14e1b5a22e7e68cfd1908bc0b7c6c7db1889c9109967bdd8fc06cd01ad3da042

SHA512
6c8b01d99e3a8fb4c1e4d671616abe4e523202aba8873ae2eecd92d4a5020330cdb1635344c846b8e8189fd3ecb15f98a2da907a89ab2d1ead5d14dc3af1689f

Download Submit
memory/952-17-0x00000000000C0000-0x00000000000D0000-memory.dmp

Filesize
64KB

Download
memory/1644-0-0x000007FEF5B03000-0x000007FEF5B04000-memory.dmp

Filesize
4KB

Download
memory/1644-1-0x0000000000860000-0x0000000000870000-memory.dmp

Filesize
64KB

Download
memory/1644-6-0x000007FEF5B00000-0x000007FEF64EC000-memory.dmp

Filesize
9.9MB

Download
memory/1644-11-0x000007FEF5B03000-0x000007FEF5B04000-memory.dmp

Filesize
4KB

Download
memory/1644-12-0x000007FEF5B00000-0x000007FEF64EC000-memory.dmp

Filesize
9.9MB

Download
memory/2772-10-0x0000000001010000-0x0000000001020000-memory.dmp

Filesize
64KB

Download
memory/2804-15-0x0000000000190000-0x00000000001A0000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads