xworm | 71015901a4bbe9f7f81a3f899bf7c21ceca2a332e272e31a4d6d2b6b4f71a59f

General

Target

23vcD1orbL.exe
Size

1.3MB
MD5

d48c30f50906d73b06aabec4a3c0ef96
SHA1

4ed2965e2c48d3e35a3e4e1ea8781d3761de94a5
SHA256

71015901a4bbe9f7f81a3f899bf7c21ceca2a332e272e31a4d6d2b6b4f71a59f
SHA512

71eb7ca54f7f1019716c9e5a323d0ffa892a6485fe387044deb9fe431e809bd2f8be5e35f3aba185eb53d437fc63a5a66704815b612e6ea960220610d459265f
SSDEEP

1536:c/G4iM3eweCmtR8K/ddBNm/LBOK+kAYxQb1biW3+FQxEfOO701d67/fxU9:cOrZ8kyt3AYeb1WRSEfO1vd9

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

resource	yara_rule
behavioral2/memory/1088-0-0x0000000000790000-0x00000000007AC000-memory.dmp	family_xworm
behavioral2/files/0x00020000000227ea-9.dat	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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	23vcD1orbL.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	23vcD1orbL.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	23vcD1orbL.exe

Executes dropped EXE 5 IoCs

pid	Process
4528	svchost.exe
376	svchost.exe
3604	svchost.exe
4168	svchost.exe
412	svchost.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-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\ProgramData\\svchost.exe"	23vcD1orbL.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs

Web Service

T1102

flow	ioc
20	pastebin.com
35	0.tcp.eu.ngrok.io
19	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
14	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

pid	Process
812	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1088	23vcD1orbL.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1088	23vcD1orbL.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	1088	23vcD1orbL.exe
Token: SeDebugPrivilege	1088	23vcD1orbL.exe
Token: SeDebugPrivilege	4528	svchost.exe
Token: SeDebugPrivilege	376	svchost.exe
Token: SeDebugPrivilege	3604	svchost.exe
Token: SeDebugPrivilege	4168	svchost.exe
Token: SeDebugPrivilege	412	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1088	23vcD1orbL.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 1088 wrote to memory of 812	1088	23vcD1orbL.exe	95
PID 1088 wrote to memory of 812	1088	23vcD1orbL.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\23vcD1orbL.exe
"C:\Users\Admin\AppData\Local\Temp\23vcD1orbL.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:1088
- 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:812

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4264 --field-trial-handle=2656,i,16940681401824032220,151921362336696246,262144 --variations-seed-version /prefetch:8
1⤵
PID:1420

C:\ProgramData\svchost.exe
C:\ProgramData\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4528

C:\ProgramData\svchost.exe
C:\ProgramData\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:376

C:\ProgramData\svchost.exe
C:\ProgramData\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3604

C:\ProgramData\svchost.exe
C:\ProgramData\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4168

C:\ProgramData\svchost.exe
C:\ProgramData\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:412

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\ProgramData\svchost.exe

Filesize
1.3MB

MD5
d48c30f50906d73b06aabec4a3c0ef96

SHA1
4ed2965e2c48d3e35a3e4e1ea8781d3761de94a5

SHA256
71015901a4bbe9f7f81a3f899bf7c21ceca2a332e272e31a4d6d2b6b4f71a59f

SHA512
71eb7ca54f7f1019716c9e5a323d0ffa892a6485fe387044deb9fe431e809bd2f8be5e35f3aba185eb53d437fc63a5a66704815b612e6ea960220610d459265f

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\svchost.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
memory/376-18-0x00007FFCA2550000-0x00007FFCA3011000-memory.dmp

Filesize
10.8MB

Download
memory/376-17-0x00007FFCA2550000-0x00007FFCA3011000-memory.dmp

Filesize
10.8MB

Download
memory/412-27-0x00007FFCA2550000-0x00007FFCA3011000-memory.dmp

Filesize
10.8MB

Download
memory/412-26-0x00007FFCA2550000-0x00007FFCA3011000-memory.dmp

Filesize
10.8MB

Download
memory/1088-8-0x000000001B450000-0x000000001B460000-memory.dmp

Filesize
64KB

Download
memory/1088-0-0x0000000000790000-0x00000000007AC000-memory.dmp

Filesize
112KB

Download
memory/1088-7-0x00007FFCA2550000-0x00007FFCA3011000-memory.dmp

Filesize
10.8MB

Download
memory/1088-2-0x000000001B450000-0x000000001B460000-memory.dmp

Filesize
64KB

Download
memory/1088-1-0x00007FFCA2550000-0x00007FFCA3011000-memory.dmp

Filesize
10.8MB

Download
memory/3604-20-0x00007FFCA2550000-0x00007FFCA3011000-memory.dmp

Filesize
10.8MB

Download
memory/3604-21-0x00007FFCA2550000-0x00007FFCA3011000-memory.dmp

Filesize
10.8MB

Download
memory/4168-23-0x00007FFCA2550000-0x00007FFCA3011000-memory.dmp

Filesize
10.8MB

Download
memory/4168-24-0x00007FFCA2550000-0x00007FFCA3011000-memory.dmp

Filesize
10.8MB

Download
memory/4528-13-0x00007FFCA2550000-0x00007FFCA3011000-memory.dmp

Filesize
10.8MB

Download
memory/4528-11-0x00007FFCA2550000-0x00007FFCA3011000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads