xworm | b46624ea261bec807dc1f93431ab3156450646976443c27322a7a9c4eec5e5f0 | Triage

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13-01-2025 01:00

250113-bcnq5axqbt 10

09-01-2025 12:16

250109-pfhwyazjhs 10

06-01-2025 14:21

250106-rpb6vs1kgr 10

02-01-2025 20:47

250102-zlagvsvpdv 10

02-01-2025 20:45

250102-zjvd9ayjar 10

Analysis

max time kernel
881s
max time network
891s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
13-01-2025 01:00

Sharing

Report Analysis Logs

General

Target

Firefox Installer (ratted).exe
Size

170KB
MD5

200eb10c73336127006740ae06003933
SHA1

32ef06528018d4f9fc8da3a7e7e07363b3a143f4
SHA256

b46624ea261bec807dc1f93431ab3156450646976443c27322a7a9c4eec5e5f0
SHA512

026eb0e018f25449f664dbc2655cfb5c360fd60a928fec344bd31b3cefa01a3fcce4dd1fc87b3aabce7557db57cb1247a1984c69b3ecb00d83f388fd6b09a0ce
SSDEEP

1536:4ig4nFL9z2BOwVCMs6se7llqn17KineXd2wVKtivEYoNRh8RX9EIKhI49No:5zFL9zWOw7sgbcUieNJqKoPC5+Lm

Score

10^/10

xworm rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

109.231.31.129:2021

Mutex

H7HNKbba3h7eEPOa

Attributes

Install_directory
%AppData%
install_file
FlrefoxUpdate.exe

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/3872-1-0x0000000000860000-0x0000000000890000-memory.dmp	family_xworm
behavioral2/files/0x000d000000023b8a-6.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	Firefox Installer (ratted).exe

Executes dropped EXE 15 IoCs

pid	Process
4612	FlrefoxUpdate.exe
4604	FlrefoxUpdate.exe
1548	FlrefoxUpdate.exe
4300	FlrefoxUpdate.exe
4016	FlrefoxUpdate.exe
1428	FlrefoxUpdate.exe
3620	FlrefoxUpdate.exe
5004	FlrefoxUpdate.exe
2380	FlrefoxUpdate.exe
4044	FlrefoxUpdate.exe
4888	FlrefoxUpdate.exe
2456	FlrefoxUpdate.exe
3092	FlrefoxUpdate.exe
4484	FlrefoxUpdate.exe
4100	FlrefoxUpdate.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
3424	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
3872	Firefox Installer (ratted).exe

Suspicious use of AdjustPrivilegeToken 17 IoCs

description	pid	Process
Token: SeDebugPrivilege	3872	Firefox Installer (ratted).exe
Token: SeDebugPrivilege	3872	Firefox Installer (ratted).exe
Token: SeDebugPrivilege	4612	FlrefoxUpdate.exe
Token: SeDebugPrivilege	4604	FlrefoxUpdate.exe
Token: SeDebugPrivilege	1548	FlrefoxUpdate.exe
Token: SeDebugPrivilege	4300	FlrefoxUpdate.exe
Token: SeDebugPrivilege	4016	FlrefoxUpdate.exe
Token: SeDebugPrivilege	1428	FlrefoxUpdate.exe
Token: SeDebugPrivilege	3620	FlrefoxUpdate.exe
Token: SeDebugPrivilege	5004	FlrefoxUpdate.exe
Token: SeDebugPrivilege	2380	FlrefoxUpdate.exe
Token: SeDebugPrivilege	4044	FlrefoxUpdate.exe
Token: SeDebugPrivilege	4888	FlrefoxUpdate.exe
Token: SeDebugPrivilege	2456	FlrefoxUpdate.exe
Token: SeDebugPrivilege	3092	FlrefoxUpdate.exe
Token: SeDebugPrivilege	4484	FlrefoxUpdate.exe
Token: SeDebugPrivilege	4100	FlrefoxUpdate.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3872	Firefox Installer (ratted).exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3872 wrote to memory of 3424	3872	Firefox Installer (ratted).exe	82
PID 3872 wrote to memory of 3424	3872	Firefox Installer (ratted).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\Firefox Installer (ratted).exe
"C:\Users\Admin\AppData\Local\Temp\Firefox Installer (ratted).exe" cmd /c %SIGILL% "SIGTERM|DELETE|SIGKILL"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3872
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "FlrefoxUpdate" /tr "C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3424

C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4612

C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4604

C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1548

C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4300

C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4016

C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1428

C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3620

C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:5004

C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2380

C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4044

C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4888

C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2456

C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3092

C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4484

C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4100

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Scheduled Task

Persistence

Scheduled Task/Job

Scheduled Task

Privilege Escalation

Scheduled Task/Job

Scheduled Task

Defense Evasion

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\Microsoft\CLR_v4.0\UsageLogs\FlrefoxUpdate.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

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

Filesize
170KB

MD5
200eb10c73336127006740ae06003933

SHA1
32ef06528018d4f9fc8da3a7e7e07363b3a143f4

SHA256
b46624ea261bec807dc1f93431ab3156450646976443c27322a7a9c4eec5e5f0

SHA512
026eb0e018f25449f664dbc2655cfb5c360fd60a928fec344bd31b3cefa01a3fcce4dd1fc87b3aabce7557db57cb1247a1984c69b3ecb00d83f388fd6b09a0ce

Download Submit
memory/3872-0-0x00007FFFF8853000-0x00007FFFF8855000-memory.dmp

Filesize
8KB

Download
memory/3872-1-0x0000000000860000-0x0000000000890000-memory.dmp

Filesize
192KB

Download
memory/3872-3-0x00007FFFF8850000-0x00007FFFF9311000-memory.dmp

Filesize
10.8MB

Download
memory/3872-4-0x00007FFFF8853000-0x00007FFFF8855000-memory.dmp

Filesize
8KB

Download
memory/3872-5-0x00007FFFF8850000-0x00007FFFF9311000-memory.dmp

Filesize
10.8MB

Download
memory/4612-8-0x00007FFFF8850000-0x00007FFFF9311000-memory.dmp

Filesize
10.8MB

Download
memory/4612-10-0x00007FFFF8850000-0x00007FFFF9311000-memory.dmp

Filesize
10.8MB

Download