xworm | 340830c7cba818a4e94a7791432f6a3e29bf103ebb47c70a6cb61e53c0ee5b2a

General

Target

FireFoxSetup.exe
Size

171KB
MD5

014b0ea8fe05df0fdea1710537dabe57
SHA1

91b47cd15009aceba1040cadabf3aa7cd6279a48
SHA256

340830c7cba818a4e94a7791432f6a3e29bf103ebb47c70a6cb61e53c0ee5b2a
SHA512

8503e8cd78442535226f41ba5d12dc0a20732940a24f865eb156ab9e75d6b4330bfdd10abba8add37713447317280f7b30f8c30bfb9f8642d15506a17e4d12d0
SSDEEP

1536:qDEV10wHVJKuuwhSMEFv9by6POwWTCs6se7llqn17KineXd2wVKtivEYoNRh8RXt:dfjhaFv9bjOwFsgbcUieNJqKoPC5+Ls

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

147.185.221.22:43768

Mutex

2bRkaANDDdoPipKE

Attributes

Install_directory
%AppData%
install_file
FireFox.exe

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral4/memory/2516-1-0x0000000000860000-0x0000000000890000-memory.dmp	family_xworm
behavioral4/files/0x0012000000023b27-60.dat	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
940	powershell.exe
1020	powershell.exe
4884	powershell.exe
4428	powershell.exe

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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	FireFoxSetup.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
3796	FireFox.exe
3908	FireFox.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-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\FireFox = "C:\\Users\\Admin\\AppData\\Roaming\\FireFox.exe"	FireFoxSetup.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
1456	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
4884	powershell.exe
4884	powershell.exe
4428	powershell.exe
4428	powershell.exe
940	powershell.exe
940	powershell.exe
1020	powershell.exe
1020	powershell.exe
2516	FireFoxSetup.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2516	FireFoxSetup.exe
Token: SeDebugPrivilege	4884	powershell.exe
Token: SeDebugPrivilege	4428	powershell.exe
Token: SeDebugPrivilege	940	powershell.exe
Token: SeDebugPrivilege	1020	powershell.exe
Token: SeDebugPrivilege	2516	FireFoxSetup.exe
Token: SeDebugPrivilege	3796	FireFox.exe
Token: SeDebugPrivilege	3908	FireFox.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2516	FireFoxSetup.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2516 wrote to memory of 4884	2516	FireFoxSetup.exe	89
PID 2516 wrote to memory of 4884	2516	FireFoxSetup.exe	89
PID 2516 wrote to memory of 4428	2516	FireFoxSetup.exe	93
PID 2516 wrote to memory of 4428	2516	FireFoxSetup.exe	93
PID 2516 wrote to memory of 940	2516	FireFoxSetup.exe	95
PID 2516 wrote to memory of 940	2516	FireFoxSetup.exe	95
PID 2516 wrote to memory of 1020	2516	FireFoxSetup.exe	97
PID 2516 wrote to memory of 1020	2516	FireFoxSetup.exe	97
PID 2516 wrote to memory of 1456	2516	FireFoxSetup.exe	99
PID 2516 wrote to memory of 1456	2516	FireFoxSetup.exe	99

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\FireFoxSetup.exe
"C:\Users\Admin\AppData\Local\Temp\FireFoxSetup.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2516
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\FireFoxSetup.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4884
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'FireFoxSetup.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4428
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\FireFox.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:940
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'FireFox.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1020
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "FireFox" /tr "C:\Users\Admin\AppData\Roaming\FireFox.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1456

C:\Users\Admin\AppData\Roaming\FireFox.exe
C:\Users\Admin\AppData\Roaming\FireFox.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3796

C:\Users\Admin\AppData\Roaming\FireFox.exe
C:\Users\Admin\AppData\Roaming\FireFox.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3908

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

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

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Downloads

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

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

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

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
62623d22bd9e037191765d5083ce16a3

SHA1
4a07da6872672f715a4780513d95ed8ddeefd259

SHA256
95d79fd575bbd21540e378fcbc1cd00d16f51af62ce15bae7080bb72c24e2010

SHA512
9a448b7a0d867466c2ea04ab84d2a9485d5fd20ab53b2b854f491831ee3f1d781b94d2635f7b0b35cb9f2d373cd52c67570879a56a42ed66bc9db06962ed4992

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
cae60f0ddddac635da71bba775a2c5b4

SHA1
386f1a036af61345a7d303d45f5230e2df817477

SHA256
b2dd636b7b0d3bfe44cef5e1175828b1fa7bd84d5563f54342944156ba996c16

SHA512
28ed8a8bc132ef56971cfd7b517b17cdb74a7f8c247ef6bff232996210075e06aa58a415825a1e038cfb547ad3dc6882bf1ca1b68c5b360ef0512a1440850253

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
22310ad6749d8cc38284aa616efcd100

SHA1
440ef4a0a53bfa7c83fe84326a1dff4326dcb515

SHA256
55b1d8021c4eb4c3c0d75e3ed7a4eb30cd0123e3d69f32eeb596fe4ffec05abf

SHA512
2ef08e2ee15bb86695fe0c10533014ffed76ececc6e579d299d3365fafb7627f53e32e600bb6d872b9f58aca94f8cb7e1e94cdfd14777527f7f0aa019d9c6def

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2km42rma.o4r.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
171KB

MD5
014b0ea8fe05df0fdea1710537dabe57

SHA1
91b47cd15009aceba1040cadabf3aa7cd6279a48

SHA256
340830c7cba818a4e94a7791432f6a3e29bf103ebb47c70a6cb61e53c0ee5b2a

SHA512
8503e8cd78442535226f41ba5d12dc0a20732940a24f865eb156ab9e75d6b4330bfdd10abba8add37713447317280f7b30f8c30bfb9f8642d15506a17e4d12d0

Download Submit
memory/2516-56-0x00007FFA0AAB0000-0x00007FFA0B571000-memory.dmp

Filesize
10.8MB

Download
memory/2516-0-0x00007FFA0AAB3000-0x00007FFA0AAB5000-memory.dmp

Filesize
8KB

Download
memory/2516-57-0x00007FFA0AAB3000-0x00007FFA0AAB5000-memory.dmp

Filesize
8KB

Download
memory/2516-58-0x00007FFA0AAB0000-0x00007FFA0B571000-memory.dmp

Filesize
10.8MB

Download
memory/2516-1-0x0000000000860000-0x0000000000890000-memory.dmp

Filesize
192KB

Download
memory/4884-17-0x00007FFA0AAB0000-0x00007FFA0B571000-memory.dmp

Filesize
10.8MB

Download
memory/4884-14-0x00007FFA0AAB0000-0x00007FFA0B571000-memory.dmp

Filesize
10.8MB

Download
memory/4884-13-0x00007FFA0AAB0000-0x00007FFA0B571000-memory.dmp

Filesize
10.8MB

Download
memory/4884-12-0x00007FFA0AAB0000-0x00007FFA0B571000-memory.dmp

Filesize
10.8MB

Download
memory/4884-7-0x00000152E1970000-0x00000152E1992000-memory.dmp

Filesize
136KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads