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/2080-0-0x0000000000150000-0x000000000016C000-memory.dmp	family_xworm
behavioral2/files/0x000a0000000231e2-7.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-1-5-21-566096764-1992588923-1249862864-1000\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 10 IoCs

pid	Process
2704	svchost.exe
5100	svchost.exe
1604	svchost.exe
2552	svchost.exe
5020	svchost.exe
2616	svchost.exe
3316	svchost.exe
4316	svchost.exe
3716	svchost.exe
4740	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-1-5-21-566096764-1992588923-1249862864-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\ProgramData\\svchost.exe"	23vcD1orbL.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 13 IoCs

Web Service

T1102

flow	ioc
83	0.tcp.eu.ngrok.io
137	0.tcp.eu.ngrok.io
15	pastebin.com
25	0.tcp.eu.ngrok.io
108	0.tcp.eu.ngrok.io
127	0.tcp.eu.ngrok.io
57	0.tcp.eu.ngrok.io
101	0.tcp.eu.ngrok.io
117	0.tcp.eu.ngrok.io
16	pastebin.com
54	0.tcp.eu.ngrok.io
74	0.tcp.eu.ngrok.io
92	0.tcp.eu.ngrok.io

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
13	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
1052	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2080	23vcD1orbL.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2080	23vcD1orbL.exe

Suspicious use of AdjustPrivilegeToken 12 IoCs

description	pid	Process
Token: SeDebugPrivilege	2080	23vcD1orbL.exe
Token: SeDebugPrivilege	2080	23vcD1orbL.exe
Token: SeDebugPrivilege	2704	svchost.exe
Token: SeDebugPrivilege	5100	svchost.exe
Token: SeDebugPrivilege	1604	svchost.exe
Token: SeDebugPrivilege	2552	svchost.exe
Token: SeDebugPrivilege	5020	svchost.exe
Token: SeDebugPrivilege	2616	svchost.exe
Token: SeDebugPrivilege	3316	svchost.exe
Token: SeDebugPrivilege	4316	svchost.exe
Token: SeDebugPrivilege	3716	svchost.exe
Token: SeDebugPrivilege	4740	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2080	23vcD1orbL.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 2080 wrote to memory of 1052	2080	23vcD1orbL.exe	93
PID 2080 wrote to memory of 1052	2080	23vcD1orbL.exe	93

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:2080
- 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:1052

C:\ProgramData\svchost.exe
C:\ProgramData\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2704

C:\ProgramData\svchost.exe
C:\ProgramData\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:5100

C:\ProgramData\svchost.exe
C:\ProgramData\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1604

C:\ProgramData\svchost.exe
C:\ProgramData\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2552

C:\ProgramData\svchost.exe
C:\ProgramData\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:5020

C:\ProgramData\svchost.exe
C:\ProgramData\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2616

C:\ProgramData\svchost.exe
C:\ProgramData\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3316

C:\ProgramData\svchost.exe
C:\ProgramData\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4316

C:\ProgramData\svchost.exe
C:\ProgramData\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3716

C:\ProgramData\svchost.exe
C:\ProgramData\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4740

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/1604-21-0x00007FF9C7C00000-0x00007FF9C86C1000-memory.dmp

Filesize
10.8MB

Download
memory/1604-20-0x00007FF9C7C00000-0x00007FF9C86C1000-memory.dmp

Filesize
10.8MB

Download
memory/2080-12-0x00007FF9C7C00000-0x00007FF9C86C1000-memory.dmp

Filesize
10.8MB

Download
memory/2080-2-0x000000001AEB0000-0x000000001AEC0000-memory.dmp

Filesize
64KB

Download
memory/2080-0-0x0000000000150000-0x000000000016C000-memory.dmp

Filesize
112KB

Download
memory/2080-13-0x000000001AEB0000-0x000000001AEC0000-memory.dmp

Filesize
64KB

Download
memory/2080-1-0x00007FF9C7C00000-0x00007FF9C86C1000-memory.dmp

Filesize
10.8MB

Download
memory/2552-24-0x00007FF9C7C00000-0x00007FF9C86C1000-memory.dmp

Filesize
10.8MB

Download
memory/2552-23-0x00007FF9C7C00000-0x00007FF9C86C1000-memory.dmp

Filesize
10.8MB

Download
memory/2616-29-0x00007FF9C7C00000-0x00007FF9C86C1000-memory.dmp

Filesize
10.8MB

Download
memory/2616-30-0x00007FF9C7C00000-0x00007FF9C86C1000-memory.dmp

Filesize
10.8MB

Download
memory/2704-9-0x00007FF9C7C00000-0x00007FF9C86C1000-memory.dmp

Filesize
10.8MB

Download
memory/2704-11-0x00007FF9C7C00000-0x00007FF9C86C1000-memory.dmp

Filesize
10.8MB

Download
memory/3316-32-0x00007FF9C7C00000-0x00007FF9C86C1000-memory.dmp

Filesize
10.8MB

Download
memory/3316-33-0x00007FF9C7C00000-0x00007FF9C86C1000-memory.dmp

Filesize
10.8MB

Download
memory/3716-39-0x00007FF9C7C00000-0x00007FF9C86C1000-memory.dmp

Filesize
10.8MB

Download
memory/3716-38-0x00007FF9C7C00000-0x00007FF9C86C1000-memory.dmp

Filesize
10.8MB

Download
memory/4316-35-0x00007FF9C7C00000-0x00007FF9C86C1000-memory.dmp

Filesize
10.8MB

Download
memory/4316-36-0x00007FF9C7C00000-0x00007FF9C86C1000-memory.dmp

Filesize
10.8MB

Download
memory/4740-41-0x00007FF9C7C00000-0x00007FF9C86C1000-memory.dmp

Filesize
10.8MB

Download
memory/4740-42-0x00007FF9C7C00000-0x00007FF9C86C1000-memory.dmp

Filesize
10.8MB

Download
memory/5020-26-0x00007FF9C7C00000-0x00007FF9C86C1000-memory.dmp

Filesize
10.8MB

Download
memory/5020-27-0x00007FF9C7C00000-0x00007FF9C86C1000-memory.dmp

Filesize
10.8MB

Download
memory/5100-18-0x00007FF9C7C00000-0x00007FF9C86C1000-memory.dmp

Filesize
10.8MB

Download
memory/5100-17-0x00007FF9C7C00000-0x00007FF9C86C1000-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