xworm | 08a0be6e3717d3ac5e6117536f42dbc4e08ff41958eb059038f648c447146198

General

Target

XClient.exe
Size

42KB
MD5

3982031e2e82143cf90b273b6b614231
SHA1

5a212b3d718c26cb34fc043b19979bfd37b07934
SHA256

08a0be6e3717d3ac5e6117536f42dbc4e08ff41958eb059038f648c447146198
SHA512

e3eee612bea1d8277136a849494cd9e1767df8b77557349e7b35d8fc3dea82031e19f5d4da767fa7589e4623b6a46671b98b7110c7f802a5ac4f5a24b036ae5a
SSDEEP

768:x/CsBpA2DYSPdTls3AyZrl2F59g/OCh80R8lEZ:x/C2dD0wF59g/OCu1EZ

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

https://pastebin.com/raw/cyX7R6Kt:1

Mutex

H52DR5xUvBhWUz6h

Attributes

Install_directory
%Userprofile%
install_file
msconfig.exe
pastebin_url
https://pastebin.com/raw/cyX7R6Kt

aes.plain

Signatures

Detect Xworm Payload 5 IoCs

resource	yara_rule
behavioral1/memory/432-1-0x00000000010F0000-0x0000000001100000-memory.dmp	family_xworm
behavioral1/files/0x0009000000016ccc-8.dat	family_xworm
behavioral1/memory/2796-11-0x0000000000F00000-0x0000000000F10000-memory.dmp	family_xworm
behavioral1/memory/2760-15-0x0000000000180000-0x0000000000190000-memory.dmp	family_xworm
behavioral1/memory/1988-17-0x0000000000320000-0x0000000000330000-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	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\msconfig.lnk	XClient.exe

Executes dropped EXE 3 IoCs

pid	Process
2796	msconfig.exe
2760	msconfig.exe
1988	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-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\msconfig = "C:\\Users\\Admin\\msconfig.exe"	XClient.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 38 IoCs

Web Service

T1102

flow	ioc
16	pastebin.com
23	pastebin.com
29	pastebin.com
7	pastebin.com
10	pastebin.com
11	pastebin.com
39	pastebin.com
43	pastebin.com
8	pastebin.com
25	pastebin.com
31	pastebin.com
22	pastebin.com
9	pastebin.com
13	pastebin.com
18	pastebin.com
20	pastebin.com
35	pastebin.com
36	pastebin.com
6	pastebin.com
17	pastebin.com
19	pastebin.com
38	pastebin.com
4	pastebin.com
14	pastebin.com
32	pastebin.com
12	pastebin.com
26	pastebin.com
40	pastebin.com
33	pastebin.com
34	pastebin.com
37	pastebin.com
21	pastebin.com
28	pastebin.com
30	pastebin.com
27	pastebin.com
5	pastebin.com
15	pastebin.com
24	pastebin.com

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
2776	schtasks.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	432	XClient.exe
Token: SeDebugPrivilege	2796	msconfig.exe
Token: SeDebugPrivilege	2760	msconfig.exe
Token: SeDebugPrivilege	1988	msconfig.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 432 wrote to memory of 2776	432	XClient.exe	29
PID 432 wrote to memory of 2776	432	XClient.exe	29
PID 432 wrote to memory of 2776	432	XClient.exe	29
PID 2916 wrote to memory of 2796	2916	taskeng.exe	32
PID 2916 wrote to memory of 2796	2916	taskeng.exe	32
PID 2916 wrote to memory of 2796	2916	taskeng.exe	32
PID 2916 wrote to memory of 2760	2916	taskeng.exe	33
PID 2916 wrote to memory of 2760	2916	taskeng.exe	33
PID 2916 wrote to memory of 2760	2916	taskeng.exe	33
PID 2916 wrote to memory of 1988	2916	taskeng.exe	34
PID 2916 wrote to memory of 1988	2916	taskeng.exe	34
PID 2916 wrote to memory of 1988	2916	taskeng.exe	34

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\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:432
- 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:2776

C:\Windows\system32\taskeng.exe
taskeng.exe {CAF74BDE-60BA-4252-A925-D21BD6DD966E} S-1-5-21-3692679935-4019334568-335155002-1000:BCXRJFKE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2916
- C:\Users\Admin\msconfig.exe
  C:\Users\Admin\msconfig.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2796
- C:\Users\Admin\msconfig.exe
  C:\Users\Admin\msconfig.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2760
- C:\Users\Admin\msconfig.exe
  C:\Users\Admin\msconfig.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1988

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

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\msconfig.exe

Filesize
42KB

MD5
3982031e2e82143cf90b273b6b614231

SHA1
5a212b3d718c26cb34fc043b19979bfd37b07934

SHA256
08a0be6e3717d3ac5e6117536f42dbc4e08ff41958eb059038f648c447146198

SHA512
e3eee612bea1d8277136a849494cd9e1767df8b77557349e7b35d8fc3dea82031e19f5d4da767fa7589e4623b6a46671b98b7110c7f802a5ac4f5a24b036ae5a

Download Submit
memory/432-0-0x000007FEF65A3000-0x000007FEF65A4000-memory.dmp

Filesize
4KB

Download
memory/432-1-0x00000000010F0000-0x0000000001100000-memory.dmp

Filesize
64KB

Download
memory/432-6-0x000007FEF65A0000-0x000007FEF6F8C000-memory.dmp

Filesize
9.9MB

Download
memory/432-10-0x000007FEF65A3000-0x000007FEF65A4000-memory.dmp

Filesize
4KB

Download
memory/432-12-0x000007FEF65A0000-0x000007FEF6F8C000-memory.dmp

Filesize
9.9MB

Download
memory/1988-17-0x0000000000320000-0x0000000000330000-memory.dmp

Filesize
64KB

Download
memory/2760-15-0x0000000000180000-0x0000000000190000-memory.dmp

Filesize
64KB

Download
memory/2796-11-0x0000000000F00000-0x0000000000F10000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads