xworm | 1731919d2dc81ad27833aaaf162c923c8c0e9ec12f0517c7db0409b74e9550c6

Analysis

max time kernel
143s
max time network
152s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
01-07-2024 18:28

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General

Target

zvgfd-main/Frozen Loader V2.exe
Size

35KB
MD5

fe1520b26e792424cfbf8fd7564b4a55
SHA1

da29f83984b250746f84906584481a0db9258b7c
SHA256

f2ece46035c2c59af63a43525c218247686faf36a256bb77a6103910e306c598
SHA512

10bb8a5a498ca268cf3d8f55cac252ec67ef6a608ed99a12d9eaff159a44700f09da47c0c06b9c15488c8e2dec2e9feb9fb8dd36152e9459ac5b151017d2b761
SSDEEP

768:2DMfF7zLKYs2Byj5fuddqLi9Fk9wnO/h4/22N7:2kF7HKYs/1od9Fk9wnO/+u2J

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

127.0.0.1:4782

192.168.1.66:4782

Mutex

56wFqcXlNlL4av7L

Attributes

Install_directory
%Public%
install_file
$77-Update.exe

aes.plain

Signatures

Detect Xworm Payload 5 IoCs

resource	yara_rule
behavioral21/memory/2264-1-0x0000000001100000-0x0000000001110000-memory.dmp	family_xworm
behavioral21/files/0x000a000000015c52-8.dat	family_xworm
behavioral21/memory/2820-10-0x0000000000A20000-0x0000000000A30000-memory.dmp	family_xworm
behavioral21/memory/1996-15-0x0000000000230000-0x0000000000240000-memory.dmp	family_xworm
behavioral21/memory/2764-17-0x0000000000F90000-0x0000000000FA0000-memory.dmp	family_xworm

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

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$77-Update.lnk	Frozen Loader V2.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$77-Update.lnk	Frozen Loader V2.exe

Executes dropped EXE 3 IoCs

pid	Process
2820	$77-Update.exe
1996	$77-Update.exe
2764	$77-Update.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-1-5-21-3627615824-4061627003-3019543961-1000\Software\Microsoft\Windows\CurrentVersion\Run\$77-Update = "C:\\Users\\Public\\$77-Update.exe"	Frozen Loader V2.exe

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

System Information Discovery
T1082

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
2844	schtasks.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2264	Frozen Loader V2.exe
Token: SeDebugPrivilege	2820	$77-Update.exe
Token: SeDebugPrivilege	1996	$77-Update.exe
Token: SeDebugPrivilege	2764	$77-Update.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2264 wrote to memory of 2844	2264	Frozen Loader V2.exe	28
PID 2264 wrote to memory of 2844	2264	Frozen Loader V2.exe	28
PID 2264 wrote to memory of 2844	2264	Frozen Loader V2.exe	28
PID 2648 wrote to memory of 2820	2648	taskeng.exe	31
PID 2648 wrote to memory of 2820	2648	taskeng.exe	31
PID 2648 wrote to memory of 2820	2648	taskeng.exe	31
PID 2648 wrote to memory of 1996	2648	taskeng.exe	34
PID 2648 wrote to memory of 1996	2648	taskeng.exe	34
PID 2648 wrote to memory of 1996	2648	taskeng.exe	34
PID 2648 wrote to memory of 2764	2648	taskeng.exe	35
PID 2648 wrote to memory of 2764	2648	taskeng.exe	35
PID 2648 wrote to memory of 2764	2648	taskeng.exe	35

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\zvgfd-main\Frozen Loader V2.exe
"C:\Users\Admin\AppData\Local\Temp\zvgfd-main\Frozen Loader V2.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2264
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "$77-Update" /tr "C:\Users\Public\$77-Update.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2844

C:\Windows\system32\taskeng.exe
taskeng.exe {B017B149-2C02-4416-ADE9-678B0C25C11F} S-1-5-21-3627615824-4061627003-3019543961-1000:SCFGBRBT\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2648
- C:\Users\Public\$77-Update.exe
  C:\Users\Public\$77-Update.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2820
- C:\Users\Public\$77-Update.exe
  C:\Users\Public\$77-Update.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1996
- C:\Users\Public\$77-Update.exe
  C:\Users\Public\$77-Update.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2764

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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\Public\$77-Update.exe

Filesize
35KB

MD5
fe1520b26e792424cfbf8fd7564b4a55

SHA1
da29f83984b250746f84906584481a0db9258b7c

SHA256
f2ece46035c2c59af63a43525c218247686faf36a256bb77a6103910e306c598

SHA512
10bb8a5a498ca268cf3d8f55cac252ec67ef6a608ed99a12d9eaff159a44700f09da47c0c06b9c15488c8e2dec2e9feb9fb8dd36152e9459ac5b151017d2b761

Download Submit
memory/1996-15-0x0000000000230000-0x0000000000240000-memory.dmp

Filesize
64KB

Download
memory/2264-0-0x000007FEF5EE3000-0x000007FEF5EE4000-memory.dmp

Filesize
4KB

Download
memory/2264-1-0x0000000001100000-0x0000000001110000-memory.dmp

Filesize
64KB

Download
memory/2264-6-0x000007FEF5EE0000-0x000007FEF68CC000-memory.dmp

Filesize
9.9MB

Download
memory/2264-11-0x000007FEF5EE3000-0x000007FEF5EE4000-memory.dmp

Filesize
4KB

Download
memory/2264-12-0x000007FEF5EE0000-0x000007FEF68CC000-memory.dmp

Filesize
9.9MB

Download
memory/2764-17-0x0000000000F90000-0x0000000000FA0000-memory.dmp

Filesize
64KB

Download
memory/2820-10-0x0000000000A20000-0x0000000000A30000-memory.dmp

Filesize
64KB

Download

Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads