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 2 IoCs

resource	yara_rule
behavioral2/memory/3944-1-0x00000000004E0000-0x00000000004F0000-memory.dmp	family_xworm
behavioral2/files/0x000a000000023b9b-7.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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	XvcClient.exe

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
1292	msconfig.exe
440	msconfig.exe
1300	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-1-5-21-493223053-2004649691-1575712786-1000\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
3360	schtasks.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	3944	XvcClient.exe
Token: SeDebugPrivilege	1292	msconfig.exe
Token: SeDebugPrivilege	440	msconfig.exe
Token: SeDebugPrivilege	1300	msconfig.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3944 wrote to memory of 3360	3944	XvcClient.exe	84
PID 3944 wrote to memory of 3360	3944	XvcClient.exe	84

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⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3944
- 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:3360

C:\Users\Admin\msconfig.exe
C:\Users\Admin\msconfig.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1292

C:\Users\Admin\msconfig.exe
C:\Users\Admin\msconfig.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:440

C:\Users\Admin\msconfig.exe
C:\Users\Admin\msconfig.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1300

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\msconfig.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
C:\Users\Admin\msconfig.exe

Filesize
39KB

MD5
8a1f910de42bbdfc2967424952092c93

SHA1
c9eb6e94e8f11e023e524eea898c14e1084568ac

SHA256
14e1b5a22e7e68cfd1908bc0b7c6c7db1889c9109967bdd8fc06cd01ad3da042

SHA512
6c8b01d99e3a8fb4c1e4d671616abe4e523202aba8873ae2eecd92d4a5020330cdb1635344c846b8e8189fd3ecb15f98a2da907a89ab2d1ead5d14dc3af1689f

Download Submit
memory/1292-9-0x00007FFFDA610000-0x00007FFFDB0D1000-memory.dmp

Filesize
10.8MB

Download
memory/1292-11-0x00007FFFDA610000-0x00007FFFDB0D1000-memory.dmp

Filesize
10.8MB

Download
memory/3944-0-0x00007FFFDA613000-0x00007FFFDA615000-memory.dmp

Filesize
8KB

Download
memory/3944-1-0x00000000004E0000-0x00000000004F0000-memory.dmp

Filesize
64KB

Download
memory/3944-6-0x00007FFFDA610000-0x00007FFFDB0D1000-memory.dmp

Filesize
10.8MB

Download
memory/3944-12-0x00007FFFDA613000-0x00007FFFDA615000-memory.dmp

Filesize
8KB

Download
memory/3944-13-0x00007FFFDA610000-0x00007FFFDB0D1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads