xworm | 11a5b2700194e4f062fb7dadf9ab9267bdf64ed9bb0ae9cb6bc787fcdb1ee48b

General

Target

PO81025.exe
Size

551KB
MD5

5ed7cd000af88d1d45ab776014efc310
SHA1

90aafc2ab9d80ee249ec8ce2482156c2964e1231
SHA256

86ffe66472be6ff6bd7931001bf0bfcb5f88bd76bac7c5ae1b366c2d6234088f
SHA512

74a7ee091fd3d5e9ade00011874b8c7f216b06845925a174b44dc399ca8f435939c1607ea7ed75cc4329a8a0023a0fb5423dde05739bc78b19109c23a3dc95fd
SSDEEP

12288:0/Yp50g7ZeK50g72OVVyEqJUhkPbwoxC0WLU/1RQIXp0W:Jp5F7AK5F7PV8jJUhoC0WIdRZ

Score

10^/10

xworm discovery execution rat trojan

Malware Config

Extracted

Family

xworm

Version

3.1

C2

193.23.160.31:1760

Mutex

H1hx0NXdYm1SIVHw

Attributes

Install_directory
%AppData%
install_file
USB.exe

aes.plain

Signatures

Detect Xworm Payload 5 IoCs

resource	yara_rule
behavioral1/memory/1364-30-0x0000000000400000-0x0000000000412000-memory.dmp	family_xworm
behavioral1/memory/1364-29-0x0000000000400000-0x0000000000412000-memory.dmp	family_xworm
behavioral1/memory/1364-28-0x0000000000400000-0x0000000000412000-memory.dmp	family_xworm
behavioral1/memory/1364-25-0x0000000000400000-0x0000000000412000-memory.dmp	family_xworm
behavioral1/memory/1364-23-0x0000000000400000-0x0000000000412000-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 2 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2156	powershell.exe
2668	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
4	ip-api.com

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2932 set thread context of 1364	2932	PO81025.exe	36

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PO81025.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PO81025.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
2740	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2932	PO81025.exe
2932	PO81025.exe
2668	powershell.exe
2156	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2932	PO81025.exe
Token: SeDebugPrivilege	1364	PO81025.exe
Token: SeDebugPrivilege	2668	powershell.exe
Token: SeDebugPrivilege	2156	powershell.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2932 wrote to memory of 2156	2932	PO81025.exe	30
PID 2932 wrote to memory of 2156	2932	PO81025.exe	30
PID 2932 wrote to memory of 2156	2932	PO81025.exe	30
PID 2932 wrote to memory of 2156	2932	PO81025.exe	30
PID 2932 wrote to memory of 2668	2932	PO81025.exe	32
PID 2932 wrote to memory of 2668	2932	PO81025.exe	32
PID 2932 wrote to memory of 2668	2932	PO81025.exe	32
PID 2932 wrote to memory of 2668	2932	PO81025.exe	32
PID 2932 wrote to memory of 2740	2932	PO81025.exe	34
PID 2932 wrote to memory of 2740	2932	PO81025.exe	34
PID 2932 wrote to memory of 2740	2932	PO81025.exe	34
PID 2932 wrote to memory of 2740	2932	PO81025.exe	34
PID 2932 wrote to memory of 1364	2932	PO81025.exe	36
PID 2932 wrote to memory of 1364	2932	PO81025.exe	36
PID 2932 wrote to memory of 1364	2932	PO81025.exe	36
PID 2932 wrote to memory of 1364	2932	PO81025.exe	36
PID 2932 wrote to memory of 1364	2932	PO81025.exe	36
PID 2932 wrote to memory of 1364	2932	PO81025.exe	36
PID 2932 wrote to memory of 1364	2932	PO81025.exe	36
PID 2932 wrote to memory of 1364	2932	PO81025.exe	36
PID 2932 wrote to memory of 1364	2932	PO81025.exe	36

C:\Users\Admin\AppData\Local\Temp\PO81025.exe
"C:\Users\Admin\AppData\Local\Temp\PO81025.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2932
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\PO81025.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2156
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\nlqtEJTrYJYRHN.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2668
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\nlqtEJTrYJYRHN" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA89E.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2740
- C:\Users\Admin\AppData\Local\Temp\PO81025.exe
  "C:\Users\Admin\AppData\Local\Temp\PO81025.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:1364

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

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpA89E.tmp

Filesize
1KB

MD5
0fcb1b0360c1102577f0c7e14edb9899

SHA1
1853f6126867690c9efd0838ed3e010a76429424

SHA256
c3fe3991bb81f2efc7c657372fdc4d608ad9f846fc5d01dffc4850d48ecfc1a1

SHA512
068417b0cad5cdd9b3b1e2eb5c867b233649423eb22c25fe429e63a5abf73efc15df50d1464b09906daff84a11f3bb515481a4aef2682fe875a3cae1c335270f

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

Filesize
7KB

MD5
24ba9c9f465906880d79934e3e34c33e

SHA1
348b76655c52ff79f678b499a5326a90293914b4

SHA256
0cc3398536b987263901c9ca76c8149ebff6b86d9322721051099975846ba925

SHA512
fe404536790260ce7e9977ddc291bab82efe0605bf74fed55191e456137da07ff9bb003520c5282e6d9dbe8e6343352575e153bcd13c1c3440684cae1d83e6c1

Download Submit
memory/1364-29-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1364-19-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1364-23-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1364-25-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1364-27-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1364-28-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1364-30-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1364-21-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2932-6-0x0000000004E50000-0x0000000004EA6000-memory.dmp

Filesize
344KB

Download
memory/2932-1-0x00000000008E0000-0x0000000000970000-memory.dmp

Filesize
576KB

Download
memory/2932-0-0x0000000073C3E000-0x0000000073C3F000-memory.dmp

Filesize
4KB

Download
memory/2932-2-0x0000000073C30000-0x000000007431E000-memory.dmp

Filesize
6.9MB

Download
memory/2932-3-0x00000000003F0000-0x0000000000408000-memory.dmp

Filesize
96KB

Download
memory/2932-5-0x0000000073C30000-0x000000007431E000-memory.dmp

Filesize
6.9MB

Download
memory/2932-4-0x0000000073C3E000-0x0000000073C3F000-memory.dmp

Filesize
4KB

Download
memory/2932-31-0x0000000073C30000-0x000000007431E000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads