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
behavioral1/memory/2764-1-0x0000000000400000-0x000000000041A000-memory.dmp	family_xworm
behavioral1/files/0x000b000000023cbf-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
1104	powershell.exe
436	powershell.exe
3016	powershell.exe
3652	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
14	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
4888	schtasks.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2764	extfix.exe

C:\Users\Admin\AppData\Local\Temp\extfix.exe
"C:\Users\Admin\AppData\Local\Temp\extfix.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2764
- 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:1104
- 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:436
- 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:3016
- 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:3652
- 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:4888

C:\Users\Public\XClient.exe
C:\Users\Public\XClient.exe
1⤵
PID:1656

C:\Users\Public\XClient.exe
C:\Users\Public\XClient.exe
1⤵
PID:4652

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

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Downloads

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

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

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\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

Filesize
944B

MD5
ba169f4dcbbf147fe78ef0061a95e83b

SHA1
92a571a6eef49fff666e0f62a3545bcd1cdcda67

SHA256
5ef1421e19fde4bc03cd825dd7d6c0e7863f85fd8f0aa4a4d4f8d555dc7606d1

SHA512
8d2e5e552210dcda684682538bc964fdd8a8ff5b24cc2cc8af813729f0202191f98eb42d38d2355df17ae620fe401aad6ceaedaed3b112fdacd32485a3a0c07c

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

Filesize
944B

MD5
72903459f297d1561ed59e88f6266c39

SHA1
22275691405b29149354de4bf3a40bd7cef6f6de

SHA256
34dd19ebba6598d5f586b5c7ac30babf89d055b5f1a6e959129a39311fe4026b

SHA512
6c04ccf522b8b544de9da57b791e7f4a3ff1de200f8a641de106f75270759e04ba028fd6db7e3784bb0233ac3c1f92ec3473d703b9ac585d4851d277d12db10f

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ohpqklkp.dxm.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/1104-13-0x00007FFE161D0000-0x00007FFE16C91000-memory.dmp

Filesize
10.8MB

Download
memory/1104-18-0x00007FFE161D0000-0x00007FFE16C91000-memory.dmp

Filesize
10.8MB

Download
memory/1104-15-0x00007FFE161D0000-0x00007FFE16C91000-memory.dmp

Filesize
10.8MB

Download
memory/1104-14-0x00007FFE161D0000-0x00007FFE16C91000-memory.dmp

Filesize
10.8MB

Download
memory/1104-9-0x00000159D8000000-0x00000159D8022000-memory.dmp

Filesize
136KB

Download
memory/2764-0-0x00007FFE161D3000-0x00007FFE161D5000-memory.dmp

Filesize
8KB

Download
memory/2764-54-0x00007FFE161D3000-0x00007FFE161D5000-memory.dmp

Filesize
8KB

Download
memory/2764-55-0x00007FFE161D0000-0x00007FFE16C91000-memory.dmp

Filesize
10.8MB

Download
memory/2764-2-0x00007FFE161D0000-0x00007FFE16C91000-memory.dmp

Filesize
10.8MB

Download
memory/2764-59-0x0000000000BE0000-0x0000000000BEC000-memory.dmp

Filesize
48KB

Download
memory/2764-1-0x0000000000400000-0x000000000041A000-memory.dmp

Filesize
104KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads