xworm | 2b685da51e11e912a197f6b099cc129ea596e0a17e1acda327a14da2f29cc14d

Analysis

max time kernel
140s
max time network
146s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
31/10/2024, 18:23

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General

Target

Output.exe
Size

886KB
MD5

5de66177f354c6897c28610c4f7bae57
SHA1

e8ad1bee7ca5c991d1837eb59d0c9b4033e055bf
SHA256

2b685da51e11e912a197f6b099cc129ea596e0a17e1acda327a14da2f29cc14d
SHA512

a4b7044c28e0ead07ade9325de64e0e1e9069d27ab4d228df4acc84952a9c9f7e05e04cdae7adb05322e413756cf906163ccf728564258ad21d558da1da471e0
SSDEEP

24576:pIRvCHulB7EdTNb8aJFWKtJ8Bx2BIQPGfK9wNJnkSDSvmEF:pIRvCOlBOF8aJFWKtJ8Bx2BXSK6NJ

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

nohicsq.localto.net:3985

Attributes

Install_directory
%AppData%
install_file
USB.exe

Signatures

Detect Xworm Payload 5 IoCs

resource	yara_rule
behavioral1/memory/2888-9-0x00000000008F0000-0x0000000000908000-memory.dmp	family_xworm
behavioral1/files/0x00090000000120f6-6.dat	family_xworm
behavioral1/memory/2556-29-0x0000000000990000-0x00000000009A8000-memory.dmp	family_xworm
behavioral1/memory/2336-32-0x0000000000F00000-0x0000000000F18000-memory.dmp	family_xworm
behavioral1/memory/1856-34-0x0000000000240000-0x0000000000258000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
xworm

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\FluxusV1.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\FluxusV1.lnk	XClient.exe

Executes dropped EXE 6 IoCs

pid	Process
2888	XClient.exe
2612	Bootstrapper.exe
1100	Process not Found
2556	FluxusV1.2
2336	FluxusV1.2
1856	FluxusV1.2

Loads dropped DLL 6 IoCs

pid	Process
2784	Output.exe
2984	WerFault.exe
2984	WerFault.exe
2984	WerFault.exe
2984	WerFault.exe
2984	WerFault.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Windows\CurrentVersion\Run\FluxusV1 = "C:\\Users\\Admin\\AppData\\Roaming\\FluxusV1.2"	XClient.exe

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

System Information Discovery
T1082

Gathers network information 2 TTPs 1 IoCs

Uses commandline utility to view network configuration.

System Information Discovery

T1082

Command and Scripting Interpreter

T1059

pid	Process
2580	ipconfig.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
2068	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2888	XClient.exe

Suspicious use of AdjustPrivilegeToken 46 IoCs

description	pid	Process
Token: SeDebugPrivilege	2888	XClient.exe
Token: SeDebugPrivilege	2888	XClient.exe
Token: SeIncreaseQuotaPrivilege	2964	WMIC.exe
Token: SeSecurityPrivilege	2964	WMIC.exe
Token: SeTakeOwnershipPrivilege	2964	WMIC.exe
Token: SeLoadDriverPrivilege	2964	WMIC.exe
Token: SeSystemProfilePrivilege	2964	WMIC.exe
Token: SeSystemtimePrivilege	2964	WMIC.exe
Token: SeProfSingleProcessPrivilege	2964	WMIC.exe
Token: SeIncBasePriorityPrivilege	2964	WMIC.exe
Token: SeCreatePagefilePrivilege	2964	WMIC.exe
Token: SeBackupPrivilege	2964	WMIC.exe
Token: SeRestorePrivilege	2964	WMIC.exe
Token: SeShutdownPrivilege	2964	WMIC.exe
Token: SeDebugPrivilege	2964	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2964	WMIC.exe
Token: SeRemoteShutdownPrivilege	2964	WMIC.exe
Token: SeUndockPrivilege	2964	WMIC.exe
Token: SeManageVolumePrivilege	2964	WMIC.exe
Token: 33	2964	WMIC.exe
Token: 34	2964	WMIC.exe
Token: 35	2964	WMIC.exe
Token: SeIncreaseQuotaPrivilege	2964	WMIC.exe
Token: SeSecurityPrivilege	2964	WMIC.exe
Token: SeTakeOwnershipPrivilege	2964	WMIC.exe
Token: SeLoadDriverPrivilege	2964	WMIC.exe
Token: SeSystemProfilePrivilege	2964	WMIC.exe
Token: SeSystemtimePrivilege	2964	WMIC.exe
Token: SeProfSingleProcessPrivilege	2964	WMIC.exe
Token: SeIncBasePriorityPrivilege	2964	WMIC.exe
Token: SeCreatePagefilePrivilege	2964	WMIC.exe
Token: SeBackupPrivilege	2964	WMIC.exe
Token: SeRestorePrivilege	2964	WMIC.exe
Token: SeShutdownPrivilege	2964	WMIC.exe
Token: SeDebugPrivilege	2964	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2964	WMIC.exe
Token: SeRemoteShutdownPrivilege	2964	WMIC.exe
Token: SeUndockPrivilege	2964	WMIC.exe
Token: SeManageVolumePrivilege	2964	WMIC.exe
Token: 33	2964	WMIC.exe
Token: 34	2964	WMIC.exe
Token: 35	2964	WMIC.exe
Token: SeDebugPrivilege	2612	Bootstrapper.exe
Token: SeDebugPrivilege	2556	FluxusV1.2
Token: SeDebugPrivilege	2336	FluxusV1.2
Token: SeDebugPrivilege	1856	FluxusV1.2

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2888	XClient.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 2784 wrote to memory of 2888	2784	Output.exe	30
PID 2784 wrote to memory of 2888	2784	Output.exe	30
PID 2784 wrote to memory of 2888	2784	Output.exe	30
PID 2784 wrote to memory of 2612	2784	Output.exe	31
PID 2784 wrote to memory of 2612	2784	Output.exe	31
PID 2784 wrote to memory of 2612	2784	Output.exe	31
PID 2612 wrote to memory of 2692	2612	Bootstrapper.exe	33
PID 2612 wrote to memory of 2692	2612	Bootstrapper.exe	33
PID 2612 wrote to memory of 2692	2612	Bootstrapper.exe	33
PID 2692 wrote to memory of 2580	2692	cmd.exe	35
PID 2692 wrote to memory of 2580	2692	cmd.exe	35
PID 2692 wrote to memory of 2580	2692	cmd.exe	35
PID 2888 wrote to memory of 2068	2888	XClient.exe	36
PID 2888 wrote to memory of 2068	2888	XClient.exe	36
PID 2888 wrote to memory of 2068	2888	XClient.exe	36
PID 2612 wrote to memory of 964	2612	Bootstrapper.exe	38
PID 2612 wrote to memory of 964	2612	Bootstrapper.exe	38
PID 2612 wrote to memory of 964	2612	Bootstrapper.exe	38
PID 964 wrote to memory of 2964	964	cmd.exe	40
PID 964 wrote to memory of 2964	964	cmd.exe	40
PID 964 wrote to memory of 2964	964	cmd.exe	40
PID 2612 wrote to memory of 2984	2612	Bootstrapper.exe	42
PID 2612 wrote to memory of 2984	2612	Bootstrapper.exe	42
PID 2612 wrote to memory of 2984	2612	Bootstrapper.exe	42
PID 2676 wrote to memory of 2556	2676	taskeng.exe	44
PID 2676 wrote to memory of 2556	2676	taskeng.exe	44
PID 2676 wrote to memory of 2556	2676	taskeng.exe	44
PID 2676 wrote to memory of 2336	2676	taskeng.exe	46
PID 2676 wrote to memory of 2336	2676	taskeng.exe	46
PID 2676 wrote to memory of 2336	2676	taskeng.exe	46
PID 2676 wrote to memory of 1856	2676	taskeng.exe	47
PID 2676 wrote to memory of 1856	2676	taskeng.exe	47
PID 2676 wrote to memory of 1856	2676	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\Output.exe
"C:\Users\Admin\AppData\Local\Temp\Output.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2784
- C:\Users\Admin\AppData\Roaming\XClient.exe
  "C:\Users\Admin\AppData\Roaming\XClient.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2888
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "FluxusV1" /tr "C:\Users\Admin\AppData\Roaming\FluxusV1.2"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2068
- C:\Users\Admin\AppData\Roaming\Bootstrapper.exe
  "C:\Users\Admin\AppData\Roaming\Bootstrapper.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2612
- - C:\Windows\system32\cmd.exe
    "cmd" /c ipconfig /all
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2692
  - - C:\Windows\system32\ipconfig.exe
      ipconfig /all
      4⤵
      Gathers network information
      PID:2580
- - C:\Windows\system32\cmd.exe
    "cmd" /c wmic nicconfig where (IPEnabled=TRUE) call SetDNSServerSearchOrder ("1.1.1.1", "1.0.0.1")
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:964
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic nicconfig where (IPEnabled=TRUE) call SetDNSServerSearchOrder ("1.1.1.1", "1.0.0.1")
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:2964
- - C:\Windows\system32\WerFault.exe
    C:\Windows\system32\WerFault.exe -u -p 2612 -s 1128
    3⤵
    - Loads dropped DLL
    PID:2984

C:\Windows\system32\taskeng.exe
taskeng.exe {D805D958-E87C-40D9-82EF-8BE819F074B5} S-1-5-21-4177215427-74451935-3209572229-1000:JSMURNPT\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2676
- C:\Users\Admin\AppData\Roaming\FluxusV1.2
  C:\Users\Admin\AppData\Roaming\FluxusV1.2
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2556
- C:\Users\Admin\AppData\Roaming\FluxusV1.2
  C:\Users\Admin\AppData\Roaming\FluxusV1.2
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2336
- C:\Users\Admin\AppData\Roaming\FluxusV1.2
  C:\Users\Admin\AppData\Roaming\FluxusV1.2
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1856

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

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\Roaming\XClient.exe

Filesize
73KB

MD5
06df71794e08473f20b46aa17c389269

SHA1
149aaa1816a59e05d55806ec88adb75e7ccf079a

SHA256
c0d08afc1dbcf3572160019c5074e5c58010205d158c9b2da1b2b7e86a465321

SHA512
f772aab2f848914e19bb6061a52fdaf3da2ccd5d3baabd6ed99c52edc73cdafc6fc0bbcd91e9cb17083da51bcba1f4f5b8a5005531141ce0c04d414aa0b018b0

Download Submit
\Users\Admin\AppData\Roaming\Bootstrapper.exe

Filesize
800KB

MD5
2a4dcf20b82896be94eb538260c5fb93

SHA1
21f232c2fd8132f8677e53258562ad98b455e679

SHA256
ebbcb489171abfcfce56554dbaeacd22a15838391cbc7c756db02995129def5a

SHA512
4f1164b2312fb94b7030d6eb6aa9f3502912ffa33505f156443570fc964bfd3bb21ded3cf84092054e07346d2dce83a0907ba33f4ba39ad3fe7a78e836efe288

Download Submit
memory/1856-34-0x0000000000240000-0x0000000000258000-memory.dmp

Filesize
96KB

Download
memory/2336-32-0x0000000000F00000-0x0000000000F18000-memory.dmp

Filesize
96KB

Download
memory/2556-29-0x0000000000990000-0x00000000009A8000-memory.dmp

Filesize
96KB

Download
memory/2612-14-0x00000000011B0000-0x000000000127E000-memory.dmp

Filesize
824KB

Download
memory/2784-1-0x0000000001320000-0x0000000001404000-memory.dmp

Filesize
912KB

Download
memory/2784-0-0x000007FEF5FB3000-0x000007FEF5FB4000-memory.dmp

Filesize
4KB

Download
memory/2888-15-0x000007FEF5FB0000-0x000007FEF699C000-memory.dmp

Filesize
9.9MB

Download
memory/2888-9-0x00000000008F0000-0x0000000000908000-memory.dmp

Filesize
96KB

Download
memory/2888-24-0x000007FEF5FB0000-0x000007FEF699C000-memory.dmp

Filesize
9.9MB

Download