xworm | c2a9fefda9159dd2712510c1c9077a1885d0ebc45251285dad95ba7184b98856

Analysis

max time kernel
37s
max time network
28s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
03-11-2024 19:33

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General

Target

XwormLoader.exe
Size

7.9MB
MD5

5b757c6d0af650a77ba1bf7edea18b36
SHA1

c2ee4e12ff4b70511dbcab25dbf8b0d45f2d52b3
SHA256

c2a9fefda9159dd2712510c1c9077a1885d0ebc45251285dad95ba7184b98856
SHA512

93ca04887c63c3a0a4a5d42c48d0f4f7cc7fe7f6dad4dd45136ac048639d2edab66a2d2459779b9a2a075fa8981ea40567b34e5ed0535c1deecfe5e838385960
SSDEEP

196608:T7b4C6XrL5HfZBEhl3xZi5OslC9+PWbXooVl41u1mMFsr5:T7yvRZBEP3xZi5Oso+PWbXooL4Sa

Score

10^/10

xworm execution rat trojan

Malware Config

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral1/files/0x000a000000012250-10.dat	family_xworm
behavioral1/memory/2684-14-0x0000000000990000-0x00000000009BA000-memory.dmp	family_xworm
behavioral1/memory/2228-58-0x0000000000E70000-0x0000000000E9A000-memory.dmp	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
1240	powershell.exe
1840	powershell.exe
2864	powershell.exe
824	powershell.exe

.NET Reactor proctector 3 IoCs

Detects an executable protected by an unregistered version of Eziriz's .NET Reactor.

resource	yara_rule
behavioral1/files/0x000a000000012250-10.dat	net_reactor
behavioral1/memory/2684-14-0x0000000000990000-0x00000000009BA000-memory.dmp	net_reactor
behavioral1/memory/2228-58-0x0000000000E70000-0x0000000000E9A000-memory.dmp	net_reactor

Deletes itself 1 IoCs

pid	Process
2564	cmd.exe

Executes dropped EXE 3 IoCs

pid	Process
2684	svchost.exe
2760	Xworm V5.6.exe
2228	svchost.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1056	timeout.exe

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
1760	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2684	svchost.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
1240	powershell.exe
1840	powershell.exe
2864	powershell.exe
824	powershell.exe
2684	svchost.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	2748	XwormLoader.exe
Token: SeDebugPrivilege	2684	svchost.exe
Token: SeDebugPrivilege	1240	powershell.exe
Token: SeDebugPrivilege	1840	powershell.exe
Token: SeDebugPrivilege	2864	powershell.exe
Token: SeDebugPrivilege	824	powershell.exe
Token: SeDebugPrivilege	2228	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2684	svchost.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 2748 wrote to memory of 2684	2748	XwormLoader.exe	30
PID 2748 wrote to memory of 2684	2748	XwormLoader.exe	30
PID 2748 wrote to memory of 2684	2748	XwormLoader.exe	30
PID 2748 wrote to memory of 2760	2748	XwormLoader.exe	31
PID 2748 wrote to memory of 2760	2748	XwormLoader.exe	31
PID 2748 wrote to memory of 2760	2748	XwormLoader.exe	31
PID 2748 wrote to memory of 2564	2748	XwormLoader.exe	32
PID 2748 wrote to memory of 2564	2748	XwormLoader.exe	32
PID 2748 wrote to memory of 2564	2748	XwormLoader.exe	32
PID 2564 wrote to memory of 1056	2564	cmd.exe	34
PID 2564 wrote to memory of 1056	2564	cmd.exe	34
PID 2564 wrote to memory of 1056	2564	cmd.exe	34
PID 2684 wrote to memory of 1240	2684	svchost.exe	35
PID 2684 wrote to memory of 1240	2684	svchost.exe	35
PID 2684 wrote to memory of 1240	2684	svchost.exe	35
PID 2684 wrote to memory of 1840	2684	svchost.exe	37
PID 2684 wrote to memory of 1840	2684	svchost.exe	37
PID 2684 wrote to memory of 1840	2684	svchost.exe	37
PID 2684 wrote to memory of 2864	2684	svchost.exe	39
PID 2684 wrote to memory of 2864	2684	svchost.exe	39
PID 2684 wrote to memory of 2864	2684	svchost.exe	39
PID 2684 wrote to memory of 824	2684	svchost.exe	41
PID 2684 wrote to memory of 824	2684	svchost.exe	41
PID 2684 wrote to memory of 824	2684	svchost.exe	41
PID 2684 wrote to memory of 1760	2684	svchost.exe	43
PID 2684 wrote to memory of 1760	2684	svchost.exe	43
PID 2684 wrote to memory of 1760	2684	svchost.exe	43
PID 2760 wrote to memory of 320	2760	Xworm V5.6.exe	45
PID 2760 wrote to memory of 320	2760	Xworm V5.6.exe	45
PID 2760 wrote to memory of 320	2760	Xworm V5.6.exe	45
PID 2400 wrote to memory of 2228	2400	taskeng.exe	47
PID 2400 wrote to memory of 2228	2400	taskeng.exe	47
PID 2400 wrote to memory of 2228	2400	taskeng.exe	47

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\XwormLoader.exe
"C:\Users\Admin\AppData\Local\Temp\XwormLoader.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2748
- C:\Users\Admin\AppData\Local\Temp\svchost.exe
  "C:\Users\Admin\AppData\Local\Temp\svchost.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2684
- - 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\svchost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1240
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1840
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\svchost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2864
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:824
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\ProgramData\svchost.exe"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1760
- C:\Users\Admin\AppData\Local\Temp\Xworm V5.6.exe
  "C:\Users\Admin\AppData\Local\Temp\Xworm V5.6.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:2760
- - C:\Windows\system32\WerFault.exe
    C:\Windows\system32\WerFault.exe -u -p 2760 -s 728
    3⤵
    PID:320
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp129.tmp.bat""
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:2564
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1056

C:\Windows\system32\taskeng.exe
taskeng.exe {CE209C76-30CF-49BA-A779-FFED16B9D20F} S-1-5-21-312935884-697965778-3955649944-1000:MXQFNXLT\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2400
- C:\ProgramData\svchost.exe
  C:\ProgramData\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2228

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Xworm V5.6.exe

Filesize
14.9MB

MD5
db51a102eab752762748a2dec8f7f67a

SHA1
194688ec1511b83063f7b0167ae250764b7591d1

SHA256
93e5e7f018053c445c521b010caff89e61f61743635db3500aad32d6e495abb2

SHA512
fb2fb6605a17fedb65e636cf3716568e85b8ea423c23e0513eb87f3a3441e2cabc4c3e6346225a9bf7b81e97470f3ab516feea649a7afb5cdf02faff8d7f09a5

Download Submit
C:\Users\Admin\AppData\Local\Temp\svchost.exe

Filesize
144KB

MD5
4b90399888a12fb85ccc3d0190d5a1d3

SHA1
3326c027bac28b9480b0c7f621481a6cc033db4e

SHA256
cede03d0ef98d200bd5b68f6ca4e0d74e2a62fc430a38083663c3031dbb1c77f

SHA512
899ec2df2f5d70716ad5d0686bfe0a6c66ccbcf7f0485efbdfc0615f90b3526cd3d31069fa66c7c6ae8bba6ce92200836c50da40a3731888b7326b970d93216a

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp129.tmp.bat

Filesize
162B

MD5
225fdd9efe90ceb38958f4adbf1f246f

SHA1
0c351c4ed22869488fa6bc5319ceb397eb2b3573

SHA256
b145b58b457cd64d84b804a13bb8ae17f4a8921834d0e4641b76cb0a7e948d02

SHA512
1a03735c20fe57b8609fae0deb064f4f042b5b229692c8f67975f59453b12b4d150c457d46a87d9ceb5bb6d28c0bc48e7134ef67310c6a6b5ca2224a512974e8

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

Filesize
7KB

MD5
fb4e295f8b3dac2550e86578146cf12a

SHA1
03ee2daf3ffe2ee34b18dd4f4ff3d3ff2eda91a7

SHA256
3726f56ac5b755ffa42b07d7241cd860194d26589957c11ff8da8a025ec1462c

SHA512
2e9ab3f3a9af7fd08238714bcdbcd69e74496a14e1a65fc2db3b7819459a04dcb94bb348b3bb470749aeaa1b6ab40f3ea9c0a2d09b2268ad9ffb14be0a178806

Download Submit
memory/1240-35-0x000000001B630000-0x000000001B912000-memory.dmp

Filesize
2.9MB

Download
memory/1240-36-0x0000000002970000-0x0000000002978000-memory.dmp

Filesize
32KB

Download
memory/1840-43-0x00000000028E0000-0x00000000028E8000-memory.dmp

Filesize
32KB

Download
memory/1840-42-0x000000001B540000-0x000000001B822000-memory.dmp

Filesize
2.9MB

Download
memory/2228-58-0x0000000000E70000-0x0000000000E9A000-memory.dmp

Filesize
168KB

Download
memory/2684-14-0x0000000000990000-0x00000000009BA000-memory.dmp

Filesize
168KB

Download
memory/2684-17-0x000007FEF30B3000-0x000007FEF30B4000-memory.dmp

Filesize
4KB

Download
memory/2748-1-0x000007FEF55C0000-0x000007FEF5F5D000-memory.dmp

Filesize
9.6MB

Download
memory/2748-2-0x000007FEF55C0000-0x000007FEF5F5D000-memory.dmp

Filesize
9.6MB

Download
memory/2748-29-0x000007FEF55C0000-0x000007FEF5F5D000-memory.dmp

Filesize
9.6MB

Download
memory/2748-0-0x000007FEF587E000-0x000007FEF587F000-memory.dmp

Filesize
4KB

Download
memory/2748-3-0x000007FEF55C0000-0x000007FEF5F5D000-memory.dmp

Filesize
9.6MB

Download
memory/2748-6-0x000007FEF55C0000-0x000007FEF5F5D000-memory.dmp

Filesize
9.6MB

Download
memory/2748-16-0x000007FEF55C0000-0x000007FEF5F5D000-memory.dmp

Filesize
9.6MB

Download
memory/2748-13-0x000007FEF55C0000-0x000007FEF5F5D000-memory.dmp

Filesize
9.6MB

Download
memory/2748-11-0x000007FEF55C0000-0x000007FEF5F5D000-memory.dmp

Filesize
9.6MB

Download
memory/2760-28-0x00000000002E0000-0x00000000011C8000-memory.dmp

Filesize
14.9MB

Download