xworm | e73c96538ec60c2117b6ed82b7f95f8894abed022ee9ab03c1be90ebd9722f06 | Triage

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
09/12/2024, 23:08 UTC

Sharing

Report Analysis Logs

General

Target

winlogoc.exe
Size

72KB
MD5

33fba80c2580eebf95e25dea03331f68
SHA1

d0ed67fbbff537eb393206fc41c18d59b9a4bb3c
SHA256

4cbe94aefe8a24ebac9fb5c11c1efc89c15b1a7b1a2bf3587baface318ee4b2b
SHA512

8213c45c68a38984a2ad11ab0651ae9933dc538ff260e31753f2f9c3aacff038048bcf2680bb7993b5f4005f48ae7e5c74e7325bdf6ef20df1ae7aa58f7ae4bc
SSDEEP

1536:UzF1OeqsJlPPf/TpX0bOc2yu/n+77QOI3taVwi4y:yFBibOL/nSsOI3tR5y

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

SLL.casacam.net:4444

Attributes

Install_directory
%LocalAppData%
install_file
Interrupi.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral12/memory/2988-1-0x0000000000630000-0x0000000000648000-memory.dmp	family_xworm
behavioral12/files/0x000200000001e746-10.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

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	winlogoc.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
4724	Interrupi.exe
3468	Interrupi.exe
4328	Interrupi.exe

Adds Run key to start application 2 TTPs 1 IoCs

Registry Run Keys / Startup Folder

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Interrupi = "C:\\Users\\Admin\\AppData\\Local\\Interrupi.exe"	winlogoc.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

pid	Process
3840	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2988	winlogoc.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2988	winlogoc.exe
Token: SeDebugPrivilege	2988	winlogoc.exe
Token: SeDebugPrivilege	4724	Interrupi.exe
Token: SeDebugPrivilege	3468	Interrupi.exe
Token: SeDebugPrivilege	4328	Interrupi.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 2988 wrote to memory of 3840	2988	winlogoc.exe	82
PID 2988 wrote to memory of 3840	2988	winlogoc.exe	82

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\winlogoc.exe
"C:\Users\Admin\AppData\Local\Temp\winlogoc.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2988
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Interrupi" /tr "C:\Users\Admin\AppData\Local\Interrupi.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3840

C:\Users\Admin\AppData\Local\Interrupi.exe
C:\Users\Admin\AppData\Local\Interrupi.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4724

C:\Users\Admin\AppData\Local\Interrupi.exe
C:\Users\Admin\AppData\Local\Interrupi.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3468

C:\Users\Admin\AppData\Local\Interrupi.exe
C:\Users\Admin\AppData\Local\Interrupi.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4328

Network

DNS

241.150.49.20.in-addr.arpa

Remote address:

8.8.8.8:53

Request

241.150.49.20.in-addr.arpa

IN PTR

Response
DNS

134.32.126.40.in-addr.arpa

Remote address:

8.8.8.8:53

Request

134.32.126.40.in-addr.arpa

IN PTR

Response
DNS

SLL.casacam.net

winlogoc.exe

Remote address:

8.8.8.8:53

Request

SLL.casacam.net

IN A

Response

SLL.casacam.net

IN A

45.245.249.248
DNS

248.249.245.45.in-addr.arpa

Remote address:

8.8.8.8:53

Request

248.249.245.45.in-addr.arpa

IN PTR

Response
DNS

104.219.191.52.in-addr.arpa

Remote address:

8.8.8.8:53

Request

104.219.191.52.in-addr.arpa

IN PTR

Response
DNS

53.210.109.20.in-addr.arpa

Remote address:

8.8.8.8:53

Request

53.210.109.20.in-addr.arpa

IN PTR

Response
DNS

198.187.3.20.in-addr.arpa

Remote address:

8.8.8.8:53

Request

198.187.3.20.in-addr.arpa

IN PTR

Response
DNS

182.129.81.91.in-addr.arpa

Remote address:

8.8.8.8:53

Request

182.129.81.91.in-addr.arpa

IN PTR

Response
DNS

14.227.111.52.in-addr.arpa

Remote address:

8.8.8.8:53

Request

14.227.111.52.in-addr.arpa

IN PTR

Response

45.245.249.248:4444

SLL.casacam.net

winlogoc.exe

287.6kB
5.6kB
257
118

8.8.8.8:53

241.150.49.20.in-addr.arpa

dns

72 B
158 B
1
1

DNS Request

241.150.49.20.in-addr.arpa
8.8.8.8:53

134.32.126.40.in-addr.arpa

dns

72 B
158 B
1
1

DNS Request

134.32.126.40.in-addr.arpa
8.8.8.8:53

SLL.casacam.net

dns

winlogoc.exe

61 B
77 B
1
1

DNS Request

SLL.casacam.net

DNS Response

45.245.249.248
8.8.8.8:53

248.249.245.45.in-addr.arpa

dns

73 B
127 B
1
1

DNS Request

248.249.245.45.in-addr.arpa
8.8.8.8:53

104.219.191.52.in-addr.arpa

dns

73 B
147 B
1
1

DNS Request

104.219.191.52.in-addr.arpa
8.8.8.8:53

53.210.109.20.in-addr.arpa

dns

72 B
158 B
1
1

DNS Request

53.210.109.20.in-addr.arpa
8.8.8.8:53

198.187.3.20.in-addr.arpa

dns

71 B
157 B
1
1

DNS Request

198.187.3.20.in-addr.arpa
8.8.8.8:53

182.129.81.91.in-addr.arpa

dns

72 B
147 B
1
1

DNS Request

182.129.81.91.in-addr.arpa
8.8.8.8:53

14.227.111.52.in-addr.arpa

dns

72 B
158 B
1
1

DNS Request

14.227.111.52.in-addr.arpa

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Scheduled Task

Persistence

Boot or Logon Autostart Execution

Registry Run Keys / Startup Folder

Scheduled Task/Job

Scheduled Task

Privilege Escalation

Boot or Logon Autostart Execution

Registry Run Keys / Startup Folder

Scheduled Task/Job

Scheduled Task

Defense Evasion

Modify Registry

Credential Access

Discovery

Query Registry

System Information Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Interrupi.exe

Filesize
72KB

MD5
33fba80c2580eebf95e25dea03331f68

SHA1
d0ed67fbbff537eb393206fc41c18d59b9a4bb3c

SHA256
4cbe94aefe8a24ebac9fb5c11c1efc89c15b1a7b1a2bf3587baface318ee4b2b

SHA512
8213c45c68a38984a2ad11ab0651ae9933dc538ff260e31753f2f9c3aacff038048bcf2680bb7993b5f4005f48ae7e5c74e7325bdf6ef20df1ae7aa58f7ae4bc

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Interrupi.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
memory/2988-0-0x00007FFCD91D3000-0x00007FFCD91D5000-memory.dmp

Filesize
8KB

Download
memory/2988-1-0x0000000000630000-0x0000000000648000-memory.dmp

Filesize
96KB

Download
memory/2988-6-0x00007FFCD91D0000-0x00007FFCD9C91000-memory.dmp

Filesize
10.8MB

Download
memory/2988-7-0x00007FFCD91D3000-0x00007FFCD91D5000-memory.dmp

Filesize
8KB

Download
memory/2988-8-0x00007FFCD91D0000-0x00007FFCD9C91000-memory.dmp

Filesize
10.8MB

Download
memory/4724-11-0x00007FFCD91D0000-0x00007FFCD9C91000-memory.dmp

Filesize
10.8MB

Download
memory/4724-13-0x00007FFCD91D0000-0x00007FFCD9C91000-memory.dmp

Filesize
10.8MB

Download