xworm | 8efa6f0711c60afd3e6cb29df2b740ee4d01b7f4290a223aa85c6f54fb3b9da5

General

Target

8efa6f0711c60afd3e6cb29df2b740ee4d01b7f4290a223aa85c6f54fb3b9da5.exe
Size

59KB
MD5

f2a18b995a82e938ab6a067491aa0d79
SHA1

d437fca2f38d712bafae8c92169eec8934699e54
SHA256

8efa6f0711c60afd3e6cb29df2b740ee4d01b7f4290a223aa85c6f54fb3b9da5
SHA512

73db4ec0271045f3f2c40fa197cf6300d81f32e4ecdddf792b475c8234d997c8d9ddfd62f944f230d8929017dfd1f473fbf4470f3bf6c2e92a8606cd3fed6d56
SSDEEP

1536:CcG/DG/fDG+wopontVm+4ys9bFKR4F+9E6ywbgOmXvkAq:CcGGfDG+wWoPm+4X9bFKac/0Omfbq

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%ProgramData%
install_file
winlogon.exe
pastebin_url
https://pastebin.com/raw/QUwdrCNg

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/1452-1-0x0000000000E90000-0x0000000000EA4000-memory.dmp	family_xworm
behavioral2/files/0x000d000000022719-57.dat	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
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
4904	powershell.exe
872	powershell.exe
2996	powershell.exe
572	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-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	8efa6f0711c60afd3e6cb29df2b740ee4d01b7f4290a223aa85c6f54fb3b9da5.exe

Executes dropped EXE 2 IoCs

pid	Process
4740	winlogon.exe
3924	winlogon.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
24	pastebin.com
25	pastebin.com

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
1876	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1452	8efa6f0711c60afd3e6cb29df2b740ee4d01b7f4290a223aa85c6f54fb3b9da5.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
572	powershell.exe
572	powershell.exe
4904	powershell.exe
4904	powershell.exe
872	powershell.exe
872	powershell.exe
2996	powershell.exe
2996	powershell.exe
1452	8efa6f0711c60afd3e6cb29df2b740ee4d01b7f4290a223aa85c6f54fb3b9da5.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	1452	8efa6f0711c60afd3e6cb29df2b740ee4d01b7f4290a223aa85c6f54fb3b9da5.exe
Token: SeDebugPrivilege	572	powershell.exe
Token: SeDebugPrivilege	4904	powershell.exe
Token: SeDebugPrivilege	872	powershell.exe
Token: SeDebugPrivilege	2996	powershell.exe
Token: SeDebugPrivilege	1452	8efa6f0711c60afd3e6cb29df2b740ee4d01b7f4290a223aa85c6f54fb3b9da5.exe
Token: SeDebugPrivilege	4740	winlogon.exe
Token: SeDebugPrivilege	3924	winlogon.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1452	8efa6f0711c60afd3e6cb29df2b740ee4d01b7f4290a223aa85c6f54fb3b9da5.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1452 wrote to memory of 572	1452	8efa6f0711c60afd3e6cb29df2b740ee4d01b7f4290a223aa85c6f54fb3b9da5.exe	92
PID 1452 wrote to memory of 572	1452	8efa6f0711c60afd3e6cb29df2b740ee4d01b7f4290a223aa85c6f54fb3b9da5.exe	92
PID 1452 wrote to memory of 4904	1452	8efa6f0711c60afd3e6cb29df2b740ee4d01b7f4290a223aa85c6f54fb3b9da5.exe	96
PID 1452 wrote to memory of 4904	1452	8efa6f0711c60afd3e6cb29df2b740ee4d01b7f4290a223aa85c6f54fb3b9da5.exe	96
PID 1452 wrote to memory of 872	1452	8efa6f0711c60afd3e6cb29df2b740ee4d01b7f4290a223aa85c6f54fb3b9da5.exe	98
PID 1452 wrote to memory of 872	1452	8efa6f0711c60afd3e6cb29df2b740ee4d01b7f4290a223aa85c6f54fb3b9da5.exe	98
PID 1452 wrote to memory of 2996	1452	8efa6f0711c60afd3e6cb29df2b740ee4d01b7f4290a223aa85c6f54fb3b9da5.exe	100
PID 1452 wrote to memory of 2996	1452	8efa6f0711c60afd3e6cb29df2b740ee4d01b7f4290a223aa85c6f54fb3b9da5.exe	100
PID 1452 wrote to memory of 1876	1452	8efa6f0711c60afd3e6cb29df2b740ee4d01b7f4290a223aa85c6f54fb3b9da5.exe	102
PID 1452 wrote to memory of 1876	1452	8efa6f0711c60afd3e6cb29df2b740ee4d01b7f4290a223aa85c6f54fb3b9da5.exe	102

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\8efa6f0711c60afd3e6cb29df2b740ee4d01b7f4290a223aa85c6f54fb3b9da5.exe
"C:\Users\Admin\AppData\Local\Temp\8efa6f0711c60afd3e6cb29df2b740ee4d01b7f4290a223aa85c6f54fb3b9da5.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1452
- 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\8efa6f0711c60afd3e6cb29df2b740ee4d01b7f4290a223aa85c6f54fb3b9da5.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:572
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '8efa6f0711c60afd3e6cb29df2b740ee4d01b7f4290a223aa85c6f54fb3b9da5.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4904
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\winlogon.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:872
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'winlogon.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2996
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "winlogon" /tr "C:\ProgramData\winlogon.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1876

C:\ProgramData\winlogon.exe
C:\ProgramData\winlogon.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4740

C:\ProgramData\winlogon.exe
C:\ProgramData\winlogon.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3924

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

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\ProgramData\winlogon.exe

Filesize
59KB

MD5
f2a18b995a82e938ab6a067491aa0d79

SHA1
d437fca2f38d712bafae8c92169eec8934699e54

SHA256
8efa6f0711c60afd3e6cb29df2b740ee4d01b7f4290a223aa85c6f54fb3b9da5

SHA512
73db4ec0271045f3f2c40fa197cf6300d81f32e4ecdddf792b475c8234d997c8d9ddfd62f944f230d8929017dfd1f473fbf4470f3bf6c2e92a8606cd3fed6d56

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\CLR_v4.0\UsageLogs\winlogon.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

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

Filesize
944B

MD5
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
944B

MD5
e70d51b7df8fa37bc73c0e70b4e82d34

SHA1
b342ac333afab91ec92ce0ab690f17e43d87d661

SHA256
1bd613817d479000e6e248c022b3521a8d64484b0e755ded0a2d043c32945730

SHA512
6cd05079ba29b479347cac367987c12e97cdb78f547ac3f95f5e84575e7df2bbe4f721fa3c9cda48fb7194f7f765cdbd3898b4c3b9fe646d90549ec726f1cff8

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

Filesize
944B

MD5
4ff4fd481c9b346992fcbb86e534c039

SHA1
784344362009eb6029a7e58792e757f82e6e1564

SHA256
b9102c8b1e1b4ef3e0b2c7d81fdc330476d5805dd6fdc00924ef0ceebaa7d0de

SHA512
708e2f7a3b505269f4da6e45b7704779439f4a7b21abfce374c41b513907566940c9ca174b175465e678b841509ae00dedc6e8ce8dc7c9613becc6f214bec668

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2k3bzkbx.oyl.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/572-9-0x000001C3A9E80000-0x000001C3A9EA2000-memory.dmp

Filesize
136KB

Download
memory/572-17-0x00007FFD366D0000-0x00007FFD37191000-memory.dmp

Filesize
10.8MB

Download
memory/572-14-0x00007FFD366D0000-0x00007FFD37191000-memory.dmp

Filesize
10.8MB

Download
memory/572-2-0x00007FFD366D0000-0x00007FFD37191000-memory.dmp

Filesize
10.8MB

Download
memory/572-8-0x00007FFD366D0000-0x00007FFD37191000-memory.dmp

Filesize
10.8MB

Download
memory/1452-0-0x00007FFD366D3000-0x00007FFD366D5000-memory.dmp

Filesize
8KB

Download
memory/1452-53-0x00007FFD366D0000-0x00007FFD37191000-memory.dmp

Filesize
10.8MB

Download
memory/1452-54-0x00007FFD366D3000-0x00007FFD366D5000-memory.dmp

Filesize
8KB

Download
memory/1452-55-0x00007FFD366D0000-0x00007FFD37191000-memory.dmp

Filesize
10.8MB

Download
memory/1452-1-0x0000000000E90000-0x0000000000EA4000-memory.dmp

Filesize
80KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads