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
behavioral5/memory/3672-1-0x0000000000AE0000-0x0000000000B10000-memory.dmp	family_xworm
behavioral5/files/0x002000000002aae0-58.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
1672	powershell.exe
4060	powershell.exe
736	powershell.exe
1488	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
1324	FireFox.exe
4436	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-1-5-21-2584844841-1405471295-1760131749-1000\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
4816	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1672	powershell.exe
1672	powershell.exe
4060	powershell.exe
4060	powershell.exe
736	powershell.exe
736	powershell.exe
1488	powershell.exe
1488	powershell.exe
3672	FireFoxSetup.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	3672	FireFoxSetup.exe
Token: SeDebugPrivilege	1672	powershell.exe
Token: SeDebugPrivilege	4060	powershell.exe
Token: SeDebugPrivilege	736	powershell.exe
Token: SeDebugPrivilege	1488	powershell.exe
Token: SeDebugPrivilege	3672	FireFoxSetup.exe
Token: SeDebugPrivilege	1324	FireFox.exe
Token: SeDebugPrivilege	4436	FireFox.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3672	FireFoxSetup.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3672 wrote to memory of 1672	3672	FireFoxSetup.exe	80
PID 3672 wrote to memory of 1672	3672	FireFoxSetup.exe	80
PID 3672 wrote to memory of 4060	3672	FireFoxSetup.exe	82
PID 3672 wrote to memory of 4060	3672	FireFoxSetup.exe	82
PID 3672 wrote to memory of 736	3672	FireFoxSetup.exe	84
PID 3672 wrote to memory of 736	3672	FireFoxSetup.exe	84
PID 3672 wrote to memory of 1488	3672	FireFoxSetup.exe	86
PID 3672 wrote to memory of 1488	3672	FireFoxSetup.exe	86
PID 3672 wrote to memory of 4816	3672	FireFoxSetup.exe	88
PID 3672 wrote to memory of 4816	3672	FireFoxSetup.exe	88

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:3672
- 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:1672
- 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:4060
- 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:736
- 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:1488
- 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:4816

C:\Users\Admin\AppData\Roaming\FireFox.exe
C:\Users\Admin\AppData\Roaming\FireFox.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1324

C:\Users\Admin\AppData\Roaming\FireFox.exe
C:\Users\Admin\AppData\Roaming\FireFox.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4436

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\Local\Microsoft\CLR_v4.0\UsageLogs\FireFox.exe.log

Filesize
654B

MD5
2cbbb74b7da1f720b48ed31085cbd5b8

SHA1
79caa9a3ea8abe1b9c4326c3633da64a5f724964

SHA256
e31b18f21621d9983bfdf1ea3e53884a9d58b8ffd79e0e5790da6f3a81a8b9d3

SHA512
ecf02d5240e0c1c005d3ab393aa7eff62bd498c2db5905157e2bf6d29e1b663228a9583950842629d1a4caef404c8941a0c7799b1a3bd1eb890a09fdb7efcff9

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

Filesize
2KB

MD5
437395ef86850fbff98c12dff89eb621

SHA1
9cec41e230fa9839de1e5c42b7dbc8b31df0d69c

SHA256
9c39f3e1ee674a289926fddddfc5549740c488686ec6513f53848a225c192ba6

SHA512
bc669893f5c97e80a62fc3d15383ed7c62ffc86bc986401735903019bb96a5f13e4d0f6356baa2021267503a4eb62681e58e28fcff435350e83aa425fa76cd64

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

Filesize
944B

MD5
ef79c323e1b63e0734a04e4f252e7b47

SHA1
641290ca1f8645aef67e518a4b57d72a940e61f4

SHA256
5c361e04d734506c0fab334e63a69bf5562e9b77c10687d056bbf2bc05d60ccd

SHA512
23e5e0c11e29aa5e413f11cbc2523304bfaede03aff9f4f39b2dc99d65aefc8a242c3573df68c49cee69ec0f77da90aea0155cca4e3e2ff7f371cf23da424b1e

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

Filesize
944B

MD5
781da0576417bf414dc558e5a315e2be

SHA1
215451c1e370be595f1c389f587efeaa93108b4c

SHA256
41a5aef8b0bbeea2766f40a7bba2c78322379f167c610f7055ccb69e7db030fe

SHA512
24e283aa30a2903ebe154dad49b26067a45e46fec57549ad080d3b9ec3f272044efaaed3822d067837f5521262192f466c47195ffe7f75f8c7c5dcf3159ea737

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

Filesize
944B

MD5
051a74485331f9d9f5014e58ec71566c

SHA1
4ed0256a84f2e95609a0b4d5c249bca624db8fe4

SHA256
3f67e4ba795fd89d33e9a1fe7547e297a82ae50b8f25eedc2b33a27866b28888

SHA512
1f15fd8ca727b198495ef826002c1cbcc63e98eecb2e92abff48354ae668e6c3aaf9bd3005664967ae75637bacee7e730ce36142483d08ae6a068d9ae3e0e17d

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_yivbos1g.c1a.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/1672-11-0x00007FFC55470000-0x00007FFC55F32000-memory.dmp

Filesize
10.8MB

Download
memory/1672-15-0x00007FFC55470000-0x00007FFC55F32000-memory.dmp

Filesize
10.8MB

Download
memory/1672-18-0x00007FFC55470000-0x00007FFC55F32000-memory.dmp

Filesize
10.8MB

Download
memory/1672-14-0x00007FFC55470000-0x00007FFC55F32000-memory.dmp

Filesize
10.8MB

Download
memory/1672-13-0x00007FFC55470000-0x00007FFC55F32000-memory.dmp

Filesize
10.8MB

Download
memory/1672-12-0x00007FFC55470000-0x00007FFC55F32000-memory.dmp

Filesize
10.8MB

Download
memory/1672-10-0x000001B6FDD20000-0x000001B6FDD42000-memory.dmp

Filesize
136KB

Download
memory/3672-0-0x00007FFC55473000-0x00007FFC55475000-memory.dmp

Filesize
8KB

Download
memory/3672-54-0x00007FFC55470000-0x00007FFC55F32000-memory.dmp

Filesize
10.8MB

Download
memory/3672-55-0x00007FFC55473000-0x00007FFC55475000-memory.dmp

Filesize
8KB

Download
memory/3672-56-0x00007FFC55470000-0x00007FFC55F32000-memory.dmp

Filesize
10.8MB

Download
memory/3672-1-0x0000000000AE0000-0x0000000000B10000-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