xworm | 86ffe66472be6ff6bd7931001bf0bfcb5f88bd76bac7c5ae1b366c2d6234088f

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/808-28-0x0000000000400000-0x0000000000412000-memory.dmp	family_xworm
behavioral1/memory/808-31-0x0000000000400000-0x0000000000412000-memory.dmp	family_xworm
behavioral1/memory/808-29-0x0000000000400000-0x0000000000412000-memory.dmp	family_xworm
behavioral1/memory/808-23-0x0000000000400000-0x0000000000412000-memory.dmp	family_xworm
behavioral1/memory/808-25-0x0000000000400000-0x0000000000412000-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
2552	powershell.exe
2772	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 2728 set thread context of 808	2728	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
2604	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2728	PO81025.exe
2728	PO81025.exe
2552	powershell.exe
2772	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2728	PO81025.exe
Token: SeDebugPrivilege	808	PO81025.exe
Token: SeDebugPrivilege	2772	powershell.exe
Token: SeDebugPrivilege	2552	powershell.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2728 wrote to memory of 2552	2728	PO81025.exe	30
PID 2728 wrote to memory of 2552	2728	PO81025.exe	30
PID 2728 wrote to memory of 2552	2728	PO81025.exe	30
PID 2728 wrote to memory of 2552	2728	PO81025.exe	30
PID 2728 wrote to memory of 2772	2728	PO81025.exe	32
PID 2728 wrote to memory of 2772	2728	PO81025.exe	32
PID 2728 wrote to memory of 2772	2728	PO81025.exe	32
PID 2728 wrote to memory of 2772	2728	PO81025.exe	32
PID 2728 wrote to memory of 2604	2728	PO81025.exe	34
PID 2728 wrote to memory of 2604	2728	PO81025.exe	34
PID 2728 wrote to memory of 2604	2728	PO81025.exe	34
PID 2728 wrote to memory of 2604	2728	PO81025.exe	34
PID 2728 wrote to memory of 808	2728	PO81025.exe	36
PID 2728 wrote to memory of 808	2728	PO81025.exe	36
PID 2728 wrote to memory of 808	2728	PO81025.exe	36
PID 2728 wrote to memory of 808	2728	PO81025.exe	36
PID 2728 wrote to memory of 808	2728	PO81025.exe	36
PID 2728 wrote to memory of 808	2728	PO81025.exe	36
PID 2728 wrote to memory of 808	2728	PO81025.exe	36
PID 2728 wrote to memory of 808	2728	PO81025.exe	36
PID 2728 wrote to memory of 808	2728	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:2728
- 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:2552
- 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:2772
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\nlqtEJTrYJYRHN" /XML "C:\Users\Admin\AppData\Local\Temp\tmp9A8B.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2604
- 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:808

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\tmp9A8B.tmp

Filesize
1KB

MD5
75e48db131735e9c8d9ff3a19e8d6516

SHA1
3f55a264387fa76b635aa698137a63081407d9ad

SHA256
399de9e96b53fc560c78b5904d0871c42035c77c9c48d5424e67bf0333f3f6df

SHA512
1e98a986943c6fc49a4bebb9944d5e8ad7e7b303486244200e649db4eb098dd74eb5cc0344907364d2dce4f60bb97692d749b8c4bfb219948a85c13cb154e238

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\9VICIQT01QYXWZTU3TFN.temp

Filesize
7KB

MD5
646994419eba8d510fdcb765b5e9f473

SHA1
c6403f38a6859bf2f19d19d48cd46b3ad80afbec

SHA256
7b76711acbd14becf3676dbe9ef52fb9910002296a095da7c45c5b7c7b529178

SHA512
4eba22129a46f194ba42ec783e07111fb894756236211bdac134dc8dffc626cd686511350464039fa79f2c588f70a0734de9eba3443387ad35b75dc428d1c9da

Download Submit
memory/808-27-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/808-28-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/808-25-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/808-21-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/808-23-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/808-29-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/808-31-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/808-19-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2728-6-0x00000000012B0000-0x0000000001306000-memory.dmp

Filesize
344KB

Download
memory/2728-1-0x0000000001310000-0x00000000013A0000-memory.dmp

Filesize
576KB

Download
memory/2728-0-0x0000000074ACE000-0x0000000074ACF000-memory.dmp

Filesize
4KB

Download
memory/2728-2-0x0000000074AC0000-0x00000000751AE000-memory.dmp

Filesize
6.9MB

Download
memory/2728-3-0x00000000004F0000-0x0000000000508000-memory.dmp

Filesize
96KB

Download
memory/2728-5-0x0000000074AC0000-0x00000000751AE000-memory.dmp

Filesize
6.9MB

Download
memory/2728-4-0x0000000074ACE000-0x0000000074ACF000-memory.dmp

Filesize
4KB

Download
memory/2728-32-0x0000000074AC0000-0x00000000751AE000-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