xworm | 5df7cf7c7d153a0e55b0ca9299d00c26625e70cff3613540c5718fe74e4c7d12

General

Target

B1OdUv8CBH.exe
Size

1.0MB
MD5

73a20ee98214059033a93ff5da62d903
SHA1

a35422a4969f7d79fc9cf597cf40b7456d5b05d8
SHA256

5df7cf7c7d153a0e55b0ca9299d00c26625e70cff3613540c5718fe74e4c7d12
SHA512

7c3b08ebbc57467aa3615b14d7ea6f629e03e49c17d6268f62345cc58f4ca9823e45ef101c1e247db354ca944481470f94f9c226bc7774f78da9ad0185a76b47
SSDEEP

1536:ZAiYlXZeFi9eKNVlb8i7ZUNQmD4O+HoddUT:anpo2Xb8C8D4OUoET

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%ProgramData%
install_file
svchost.exe
pastebin_url
https://pastebin.com/raw/z5PQ82wE

Signatures

Detect Xworm Payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1952-0-0x0000000000350000-0x000000000036A000-memory.dmp	family_xworm
C:\ProgramData\svchost.exe	family_xworm

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

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

Processes:

B1OdUv8CBH.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4084619521-2220719027-1909462854-1000\Control Panel\International\Geo\Nation	B1OdUv8CBH.exe

Drops startup file 2 IoCs

Processes:

B1OdUv8CBH.exe

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	B1OdUv8CBH.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	B1OdUv8CBH.exe

Executes dropped EXE 1 IoCs

Processes:

svchost.exe

pid process

4984 svchost.exe

pid	process
4984	svchost.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

B1OdUv8CBH.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-4084619521-2220719027-1909462854-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\ProgramData\\svchost.exe"	B1OdUv8CBH.exe

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

Web Service
T1102

Processes:

flow ioc

11 pastebin.com
12 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.

Processes:

flow ioc

9 ip-api.com
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exe

pid process

1628 schtasks.exe
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

B1OdUv8CBH.exe

pid process

1952 B1OdUv8CBH.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

B1OdUv8CBH.exe

pid process

1952 B1OdUv8CBH.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

B1OdUv8CBH.exesvchost.exe

description pid process

Token: SeDebugPrivilege 1952 B1OdUv8CBH.exe
Token: SeDebugPrivilege 1952 B1OdUv8CBH.exe
Token: SeDebugPrivilege 4984 svchost.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

B1OdUv8CBH.exe

pid process

1952 B1OdUv8CBH.exe

flow	ioc
11	pastebin.com
12	pastebin.com

flow	ioc
9	ip-api.com

pid	process
1628	schtasks.exe

pid	process
1952	B1OdUv8CBH.exe

pid	process
1952	B1OdUv8CBH.exe

description	pid	process
Token: SeDebugPrivilege	1952	B1OdUv8CBH.exe
Token: SeDebugPrivilege	1952	B1OdUv8CBH.exe
Token: SeDebugPrivilege	4984	svchost.exe

pid	process
1952	B1OdUv8CBH.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

B1OdUv8CBH.exe

description	pid	process	target process
PID 1952 wrote to memory of 1628	1952	B1OdUv8CBH.exe	schtasks.exe
PID 1952 wrote to memory of 1628	1952	B1OdUv8CBH.exe	schtasks.exe

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\B1OdUv8CBH.exe
"C:\Users\Admin\AppData\Local\Temp\B1OdUv8CBH.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1952

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\ProgramData\svchost.exe"
2⤵
- Creates scheduled task(s)
PID:1628

C:\ProgramData\svchost.exe
C:\ProgramData\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4984

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Web Service

1

T1102

Impact

Resource Development

Reconnaissance

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Downloads

C:\ProgramData\svchost.exe
Filesize
1.0MB

MD5
73a20ee98214059033a93ff5da62d903

SHA1
a35422a4969f7d79fc9cf597cf40b7456d5b05d8

SHA256
5df7cf7c7d153a0e55b0ca9299d00c26625e70cff3613540c5718fe74e4c7d12

SHA512
7c3b08ebbc57467aa3615b14d7ea6f629e03e49c17d6268f62345cc58f4ca9823e45ef101c1e247db354ca944481470f94f9c226bc7774f78da9ad0185a76b47

Download Submit
memory/1952-0-0x0000000000350000-0x000000000036A000-memory.dmp

Filesize
104KB

Download
memory/1952-1-0x00007FFAB5CF0000-0x00007FFAB67B1000-memory.dmp

Filesize
10.8MB

Download
memory/1952-2-0x000000001B120000-0x000000001B130000-memory.dmp

Filesize
64KB

Download
memory/1952-7-0x00007FFAB5CF0000-0x00007FFAB67B1000-memory.dmp

Filesize
10.8MB

Download
memory/1952-10-0x000000001B120000-0x000000001B130000-memory.dmp

Filesize
64KB

Download
memory/4984-11-0x00007FFAB5CF0000-0x00007FFAB67B1000-memory.dmp

Filesize
10.8MB

Download
memory/4984-13-0x00007FFAB5CF0000-0x00007FFAB67B1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads