xworm | c6ac39bb6bd04c72e7c1f23b6d98b7a3ae591efa9ef285458b27bef353a255cb

General

Target

extfix.exe
Size

75KB
MD5

03ac7cea640de499ffd4d820cbf91aec
SHA1

c5431178ad49172a65398770a03fecccc37f711f
SHA256

c6ac39bb6bd04c72e7c1f23b6d98b7a3ae591efa9ef285458b27bef353a255cb
SHA512

52186a0938de15b83873626f72f594219dc193b1d5b7fbec5d2577761488f3379d5cd42e6de205964f6dec5cdfc3023de36375da28a0146a5311ab0516f23d7c
SSDEEP

1536:2L1YZRemnhY0X1+Q3jaHPjbIbnFJ8v6sqKoO4o0iD8:22ZPhhzOHobnv6oOz0iA

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:64112

FRERE-57054.portmap.host:64112

solutions-stunning.gl.at.ply.gg:64112:64112

solutions-stunning.gl.at.ply.gg:64112

Attributes

Install_directory
%Public%
install_file
XClient.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/2084-1-0x00000000009F0000-0x0000000000A0A000-memory.dmp	family_xworm
behavioral2/files/0x002c00000004506e-59.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
3020	powershell.exe
1136	powershell.exe
2700	powershell.exe
1944	powershell.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
15	ip-api.com

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
2552	schtasks.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2084	extfix.exe

C:\Users\Admin\AppData\Local\Temp\extfix.exe
"C:\Users\Admin\AppData\Local\Temp\extfix.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2084
- 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\extfix.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  PID:3020
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'extfix.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  PID:1136
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Public\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  PID:2700
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  PID:1944
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Public\XClient.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2552

C:\Users\Public\XClient.exe
"C:\Users\Public\XClient.exe"
1⤵
PID:3916

C:\Users\Public\XClient.exe
"C:\Users\Public\XClient.exe"
1⤵
PID:552

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
654B

MD5
11c6e74f0561678d2cf7fc075a6cc00c

SHA1
535ee79ba978554abcb98c566235805e7ea18490

SHA256
d39a78fabca39532fcb85ce908781a75132e1bd01cc50a3b290dd87127837d63

SHA512
32c63d67bf512b42e7f57f71287b354200126cb417ef9d869c72e0b9388a7c2f5e3b61f303f1353baa1bf482d0f17e06e23c9f50b2f1babd4d958b6da19c40b0

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

Filesize
3KB

MD5
3eb3833f769dd890afc295b977eab4b4

SHA1
e857649b037939602c72ad003e5d3698695f436f

SHA256
c485a6e2fd17c342fca60060f47d6a5655a65a412e35e001bb5bf88d96e6e485

SHA512
c24bbc8f278478d43756807b8c584d4e3fb2289db468bc92986a489f74a8da386a667a758360a397e77e018e363be8912ac260072fa3e31117ad0599ac749e72

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

Filesize
1KB

MD5
f0f59cccd39a3694e0e6dfd44d0fa76d

SHA1
fccd7911d463041e1168431df8823e4c4ea387c1

SHA256
70466c7f3a911368d653396fdd68f993322c69e1797b492ca00f8be34b7f3401

SHA512
5c726e1e28cb9c0c3ab963fbfbf471c6033839f3e535a3811581fdaa4da17175e5a8a8be84a4fccd99b81e048058e51d230ff3836e3ec920057a1b1676110bee

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

Filesize
1KB

MD5
584a3f6021663a38e89aabb43644af55

SHA1
35ec76ebd8ca9e18f8d0317767ee65b28563d300

SHA256
e8bc879869f4c1fbd857b93903db09a757ddc5669dfe9a9e1fdc55ea7efa71aa

SHA512
c6bd91f09d000153a202bf197a8b1f450197a83a0284669be5fa436cc4faffcfa6f45ddcdd75a46b787f2279960fc799d9beaa7daa95b078944d06531d59c379

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

Filesize
1KB

MD5
8c89931b773ec9523b9b0a2ed2b60f34

SHA1
05cb6535cb9f08fceef8303045cb60c4b40c450c

SHA256
961ea04c7ae3827031f14eb64bc91e0e5795ebaf902df46852706673ebe5cc69

SHA512
d8a110be11de255b3bd870d56860adae4a58911d791f3822bc395a9756f94201eae1fae9c55233aacc8c923a67ce66c5a6a895d13ee460ac11b0620758c588e8

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_kmcknamp.jyr.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Public\XClient.exe

Filesize
75KB

MD5
03ac7cea640de499ffd4d820cbf91aec

SHA1
c5431178ad49172a65398770a03fecccc37f711f

SHA256
c6ac39bb6bd04c72e7c1f23b6d98b7a3ae591efa9ef285458b27bef353a255cb

SHA512
52186a0938de15b83873626f72f594219dc193b1d5b7fbec5d2577761488f3379d5cd42e6de205964f6dec5cdfc3023de36375da28a0146a5311ab0516f23d7c

Download Submit
memory/2084-0-0x00007FFB39223000-0x00007FFB39225000-memory.dmp

Filesize
8KB

Download
memory/2084-2-0x00007FFB39220000-0x00007FFB39CE2000-memory.dmp

Filesize
10.8MB

Download
memory/2084-1-0x00000000009F0000-0x0000000000A0A000-memory.dmp

Filesize
104KB

Download
memory/2084-57-0x00007FFB39220000-0x00007FFB39CE2000-memory.dmp

Filesize
10.8MB

Download
memory/2084-56-0x00007FFB39223000-0x00007FFB39225000-memory.dmp

Filesize
8KB

Download
memory/3020-12-0x00000187291F0000-0x0000018729212000-memory.dmp

Filesize
136KB

Download
memory/3020-20-0x00007FFB39220000-0x00007FFB39CE2000-memory.dmp

Filesize
10.8MB

Download
memory/3020-17-0x00007FFB39220000-0x00007FFB39CE2000-memory.dmp

Filesize
10.8MB

Download
memory/3020-16-0x00007FFB39220000-0x00007FFB39CE2000-memory.dmp

Filesize
10.8MB

Download
memory/3020-15-0x00007FFB39220000-0x00007FFB39CE2000-memory.dmp

Filesize
10.8MB

Download
memory/3020-14-0x00007FFB39220000-0x00007FFB39CE2000-memory.dmp

Filesize
10.8MB

Download
memory/3020-13-0x00007FFB39220000-0x00007FFB39CE2000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads