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 4 IoCs

resource	yara_rule
behavioral2/memory/2900-1-0x0000000000F90000-0x0000000000FC0000-memory.dmp	family_xworm
behavioral2/files/0x000900000001211a-36.dat	family_xworm
behavioral2/memory/1432-38-0x00000000000D0000-0x0000000000100000-memory.dmp	family_xworm
behavioral2/memory/2992-40-0x0000000000F70000-0x0000000000FA0000-memory.dmp	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
2252	powershell.exe
1984	powershell.exe
1992	powershell.exe
2220	powershell.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
1432	FireFox.exe
2992	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-1-5-21-1846800975-3917212583-2893086201-1000\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
2604	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2252	powershell.exe
1984	powershell.exe
1992	powershell.exe
2220	powershell.exe
2900	FireFoxSetup.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2900	FireFoxSetup.exe
Token: SeDebugPrivilege	2252	powershell.exe
Token: SeDebugPrivilege	1984	powershell.exe
Token: SeDebugPrivilege	1992	powershell.exe
Token: SeDebugPrivilege	2220	powershell.exe
Token: SeDebugPrivilege	2900	FireFoxSetup.exe
Token: SeDebugPrivilege	1432	FireFox.exe
Token: SeDebugPrivilege	2992	FireFox.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2900	FireFoxSetup.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2900 wrote to memory of 2252	2900	FireFoxSetup.exe	28
PID 2900 wrote to memory of 2252	2900	FireFoxSetup.exe	28
PID 2900 wrote to memory of 2252	2900	FireFoxSetup.exe	28
PID 2900 wrote to memory of 1984	2900	FireFoxSetup.exe	30
PID 2900 wrote to memory of 1984	2900	FireFoxSetup.exe	30
PID 2900 wrote to memory of 1984	2900	FireFoxSetup.exe	30
PID 2900 wrote to memory of 1992	2900	FireFoxSetup.exe	32
PID 2900 wrote to memory of 1992	2900	FireFoxSetup.exe	32
PID 2900 wrote to memory of 1992	2900	FireFoxSetup.exe	32
PID 2900 wrote to memory of 2220	2900	FireFoxSetup.exe	34
PID 2900 wrote to memory of 2220	2900	FireFoxSetup.exe	34
PID 2900 wrote to memory of 2220	2900	FireFoxSetup.exe	34
PID 2900 wrote to memory of 2604	2900	FireFoxSetup.exe	36
PID 2900 wrote to memory of 2604	2900	FireFoxSetup.exe	36
PID 2900 wrote to memory of 2604	2900	FireFoxSetup.exe	36
PID 1844 wrote to memory of 1432	1844	taskeng.exe	42
PID 1844 wrote to memory of 1432	1844	taskeng.exe	42
PID 1844 wrote to memory of 1432	1844	taskeng.exe	42
PID 1844 wrote to memory of 2992	1844	taskeng.exe	43
PID 1844 wrote to memory of 2992	1844	taskeng.exe	43
PID 1844 wrote to memory of 2992	1844	taskeng.exe	43

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⤵
- 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:2900
- 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:2252
- 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:1984
- 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:1992
- 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:2220
- 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:2604

C:\Windows\system32\taskeng.exe
taskeng.exe {2DCF27B3-C33C-4456-B14C-BFECBF6D6421} S-1-5-21-1846800975-3917212583-2893086201-1000:ZQABOPWE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1844
- C:\Users\Admin\AppData\Roaming\FireFox.exe
  C:\Users\Admin\AppData\Roaming\FireFox.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1432
- C:\Users\Admin\AppData\Roaming\FireFox.exe
  C:\Users\Admin\AppData\Roaming\FireFox.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2992

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

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
171KB

MD5
014b0ea8fe05df0fdea1710537dabe57

SHA1
91b47cd15009aceba1040cadabf3aa7cd6279a48

SHA256
340830c7cba818a4e94a7791432f6a3e29bf103ebb47c70a6cb61e53c0ee5b2a

SHA512
8503e8cd78442535226f41ba5d12dc0a20732940a24f865eb156ab9e75d6b4330bfdd10abba8add37713447317280f7b30f8c30bfb9f8642d15506a17e4d12d0

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
5163e70729d5f6cc951a590120e83c90

SHA1
f09d389d83cf27504619cf393d65e384862117e5

SHA256
127d92be11100c33f650982e98764c40d5cec9beb9687fe031c6ccec85fd0bc1

SHA512
0b05d1e2512107f5eeb4676ad13724fe3658a8b420f712732b5efd30a67c3ed9db13f95dce57a0915a7036ad5acbf17a2d4c71d2e4ca034e57dbcb4629fbfc1b

Download Submit
memory/1432-38-0x00000000000D0000-0x0000000000100000-memory.dmp

Filesize
192KB

Download
memory/1984-14-0x000000001B7A0000-0x000000001BA82000-memory.dmp

Filesize
2.9MB

Download
memory/1984-15-0x0000000001FC0000-0x0000000001FC8000-memory.dmp

Filesize
32KB

Download
memory/2252-7-0x000000001B600000-0x000000001B8E2000-memory.dmp

Filesize
2.9MB

Download
memory/2252-8-0x0000000002790000-0x0000000002798000-memory.dmp

Filesize
32KB

Download
memory/2252-6-0x00000000028F0000-0x0000000002970000-memory.dmp

Filesize
512KB

Download
memory/2900-0-0x000007FEF5583000-0x000007FEF5584000-memory.dmp

Filesize
4KB

Download
memory/2900-31-0x000000001B3F0000-0x000000001B470000-memory.dmp

Filesize
512KB

Download
memory/2900-32-0x000007FEF5583000-0x000007FEF5584000-memory.dmp

Filesize
4KB

Download
memory/2900-33-0x000000001B3F0000-0x000000001B470000-memory.dmp

Filesize
512KB

Download
memory/2900-1-0x0000000000F90000-0x0000000000FC0000-memory.dmp

Filesize
192KB

Download
memory/2992-40-0x0000000000F70000-0x0000000000FA0000-memory.dmp

Filesize
192KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads