xworm | 82e9e87e7e46c834d08ce14395baf877d6ad62e5bee900184ba699cbc7080393

General

Target

82e9e87e7e46c834d08ce14395baf877d6ad62e5bee900184ba699cbc7080393.exe
Size

64KB
MD5

a9efb8440dbd7b17e61dd777bbd561d9
SHA1

0706477d61db1419034e80a65f1bb3336e5de485
SHA256

82e9e87e7e46c834d08ce14395baf877d6ad62e5bee900184ba699cbc7080393
SHA512

6ef279b3343bc0702e7645f4c1eadc82651d52ad3a709c49dfc874246d266b6a59ddd6ef1059bbaba7aba4758f12579b7207fe5bd6f183214414c5c294e8b764
SSDEEP

1536:3YY5CyFc7KBCyDCfkYqSufbRo+7iyjA7nOLVQszse2:3YY84BCGCfkYqSYbRFEnOL20se2

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%LocalAppData%
install_file
Solara.exe
pastebin_url
https://pastebin.com/qpB6hEFt
telegram
https://api.telegram.org/bot6552294168:AAE8W0wx7wB9Mqkq2LoOz_YDua7Nm_XgpVU/sendMessage?chat_id=6443295666

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/memory/2388-1-0x0000000000F80000-0x0000000000F96000-memory.dmp	family_xworm
behavioral1/files/0x000a000000012255-8.dat	family_xworm
behavioral1/memory/2500-10-0x0000000000E80000-0x0000000000E96000-memory.dmp	family_xworm
behavioral1/memory/612-16-0x0000000000220000-0x0000000000236000-memory.dmp	family_xworm

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

Detects Windows executables referencing non-Windows User-Agents 4 IoCs

resource	yara_rule
behavioral1/memory/2388-1-0x0000000000F80000-0x0000000000F96000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/files/0x000a000000012255-8.dat	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/memory/2500-10-0x0000000000E80000-0x0000000000E96000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/memory/612-16-0x0000000000220000-0x0000000000236000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

Detects executables using Telegram Chat Bot 4 IoCs

resource	yara_rule
behavioral1/memory/2388-1-0x0000000000F80000-0x0000000000F96000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_TelegramChatBot
behavioral1/files/0x000a000000012255-8.dat	INDICATOR_SUSPICIOUS_EXE_TelegramChatBot
behavioral1/memory/2500-10-0x0000000000E80000-0x0000000000E96000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_TelegramChatBot
behavioral1/memory/612-16-0x0000000000220000-0x0000000000236000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_TelegramChatBot

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Solara.lnk	82e9e87e7e46c834d08ce14395baf877d6ad62e5bee900184ba699cbc7080393.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Solara.lnk	82e9e87e7e46c834d08ce14395baf877d6ad62e5bee900184ba699cbc7080393.exe

Executes dropped EXE 3 IoCs

pid	Process
2500	Solara.exe
1572	Solara.exe
612	Solara.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-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Windows\CurrentVersion\Run\Solara = "C:\\Users\\Admin\\AppData\\Local\\Solara.exe"	82e9e87e7e46c834d08ce14395baf877d6ad62e5bee900184ba699cbc7080393.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
6	pastebin.com
7	pastebin.com

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

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
2072	schtasks.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2388	82e9e87e7e46c834d08ce14395baf877d6ad62e5bee900184ba699cbc7080393.exe
Token: SeDebugPrivilege	2500	Solara.exe
Token: SeDebugPrivilege	1572	Solara.exe
Token: SeDebugPrivilege	612	Solara.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2388 wrote to memory of 2072	2388	82e9e87e7e46c834d08ce14395baf877d6ad62e5bee900184ba699cbc7080393.exe	29
PID 2388 wrote to memory of 2072	2388	82e9e87e7e46c834d08ce14395baf877d6ad62e5bee900184ba699cbc7080393.exe	29
PID 2388 wrote to memory of 2072	2388	82e9e87e7e46c834d08ce14395baf877d6ad62e5bee900184ba699cbc7080393.exe	29
PID 2220 wrote to memory of 2500	2220	taskeng.exe	32
PID 2220 wrote to memory of 2500	2220	taskeng.exe	32
PID 2220 wrote to memory of 2500	2220	taskeng.exe	32
PID 2220 wrote to memory of 1572	2220	taskeng.exe	35
PID 2220 wrote to memory of 1572	2220	taskeng.exe	35
PID 2220 wrote to memory of 1572	2220	taskeng.exe	35
PID 2220 wrote to memory of 612	2220	taskeng.exe	36
PID 2220 wrote to memory of 612	2220	taskeng.exe	36
PID 2220 wrote to memory of 612	2220	taskeng.exe	36

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\82e9e87e7e46c834d08ce14395baf877d6ad62e5bee900184ba699cbc7080393.exe
"C:\Users\Admin\AppData\Local\Temp\82e9e87e7e46c834d08ce14395baf877d6ad62e5bee900184ba699cbc7080393.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2388
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Solara" /tr "C:\Users\Admin\AppData\Local\Solara.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2072

C:\Windows\system32\taskeng.exe
taskeng.exe {425AFABA-7267-4AF1-9473-6912329EFAAD} S-1-5-21-2297530677-1229052932-2803917579-1000:HKULBIBU\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2220
- C:\Users\Admin\AppData\Local\Solara.exe
  C:\Users\Admin\AppData\Local\Solara.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2500
- C:\Users\Admin\AppData\Local\Solara.exe
  C:\Users\Admin\AppData\Local\Solara.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1572
- C:\Users\Admin\AppData\Local\Solara.exe
  C:\Users\Admin\AppData\Local\Solara.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:612

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Solara.exe

Filesize
64KB

MD5
a9efb8440dbd7b17e61dd777bbd561d9

SHA1
0706477d61db1419034e80a65f1bb3336e5de485

SHA256
82e9e87e7e46c834d08ce14395baf877d6ad62e5bee900184ba699cbc7080393

SHA512
6ef279b3343bc0702e7645f4c1eadc82651d52ad3a709c49dfc874246d266b6a59ddd6ef1059bbaba7aba4758f12579b7207fe5bd6f183214414c5c294e8b764

Download Submit
memory/612-16-0x0000000000220000-0x0000000000236000-memory.dmp

Filesize
88KB

Download
memory/2388-0-0x000007FEF5AC3000-0x000007FEF5AC4000-memory.dmp

Filesize
4KB

Download
memory/2388-1-0x0000000000F80000-0x0000000000F96000-memory.dmp

Filesize
88KB

Download
memory/2388-2-0x000007FEF5AC0000-0x000007FEF64AC000-memory.dmp

Filesize
9.9MB

Download
memory/2388-11-0x000007FEF5AC3000-0x000007FEF5AC4000-memory.dmp

Filesize
4KB

Download
memory/2388-12-0x000007FEF5AC0000-0x000007FEF64AC000-memory.dmp

Filesize
9.9MB

Download
memory/2500-10-0x0000000000E80000-0x0000000000E96000-memory.dmp

Filesize
88KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads