xworm | d24b11e0094921a74e6342cc94e1c6a2f8bcfac2c4ad740207978e3d9da14cf2

General

Target

d24b11e0094921a74e6342cc94e1c6a2f8bcfac2c4ad740207978e3d9da14cf2N.exe
Size

196KB
MD5

f9b5e75d1355cfcf2191ffec04ea1d30
SHA1

3d4e91c29d5bfa2c47b7e7dc481a4be89b6ac207
SHA256

d24b11e0094921a74e6342cc94e1c6a2f8bcfac2c4ad740207978e3d9da14cf2
SHA512

73e671094f0a3e1060065f76234855a51ebe5b90a578c94ceee0eb669f98aae355236444d6c7b9ea3ada292a876861205ffc2a59794acd75a845de8fddecd9d4
SSDEEP

3072:UTQjpvqkb20fGbVy3OeMUKRUGKXs+S++7KFSbxeY+qDDrMB:Uc1pbPfGn+GqStKEbxI

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%AppData%
install_file
Microsoft Edge.exe
pastebin_url
https://pastebin.com/raw/DKus0sZv

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/2288-1-0x0000000000200000-0x0000000000236000-memory.dmp	family_xworm
behavioral2/files/0x00050000000230d8-19.dat	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	d24b11e0094921a74e6342cc94e1c6a2f8bcfac2c4ad740207978e3d9da14cf2N.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Microsoft Edge.lnk	d24b11e0094921a74e6342cc94e1c6a2f8bcfac2c4ad740207978e3d9da14cf2N.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Microsoft Edge.lnk	d24b11e0094921a74e6342cc94e1c6a2f8bcfac2c4ad740207978e3d9da14cf2N.exe

Executes dropped EXE 2 IoCs

pid	Process
1300	Microsoft Edge.exe
2140	Microsoft Edge.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-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Microsoft Edge = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft Edge.exe"	d24b11e0094921a74e6342cc94e1c6a2f8bcfac2c4ad740207978e3d9da14cf2N.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 4 IoCs

Web Service

T1102

flow	ioc
18	0.tcp.sa.ngrok.io
45	0.tcp.sa.ngrok.io
15	pastebin.com
16	pastebin.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
3040	schtasks.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2288	d24b11e0094921a74e6342cc94e1c6a2f8bcfac2c4ad740207978e3d9da14cf2N.exe
Token: SeDebugPrivilege	2288	d24b11e0094921a74e6342cc94e1c6a2f8bcfac2c4ad740207978e3d9da14cf2N.exe
Token: SeDebugPrivilege	1300	Microsoft Edge.exe
Token: SeDebugPrivilege	2140	Microsoft Edge.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 2288 wrote to memory of 3040	2288	d24b11e0094921a74e6342cc94e1c6a2f8bcfac2c4ad740207978e3d9da14cf2N.exe	95
PID 2288 wrote to memory of 3040	2288	d24b11e0094921a74e6342cc94e1c6a2f8bcfac2c4ad740207978e3d9da14cf2N.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\d24b11e0094921a74e6342cc94e1c6a2f8bcfac2c4ad740207978e3d9da14cf2N.exe
"C:\Users\Admin\AppData\Local\Temp\d24b11e0094921a74e6342cc94e1c6a2f8bcfac2c4ad740207978e3d9da14cf2N.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2288
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Microsoft Edge" /tr "C:\Users\Admin\AppData\Roaming\Microsoft Edge.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3040

C:\Users\Admin\AppData\Roaming\Microsoft Edge.exe
"C:\Users\Admin\AppData\Roaming\Microsoft Edge.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1300

C:\Users\Admin\AppData\Roaming\Microsoft Edge.exe
"C:\Users\Admin\AppData\Roaming\Microsoft Edge.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2140

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

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Microsoft Edge.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft Edge.exe

Filesize
196KB

MD5
f9b5e75d1355cfcf2191ffec04ea1d30

SHA1
3d4e91c29d5bfa2c47b7e7dc481a4be89b6ac207

SHA256
d24b11e0094921a74e6342cc94e1c6a2f8bcfac2c4ad740207978e3d9da14cf2

SHA512
73e671094f0a3e1060065f76234855a51ebe5b90a578c94ceee0eb669f98aae355236444d6c7b9ea3ada292a876861205ffc2a59794acd75a845de8fddecd9d4

Download Submit
memory/1300-21-0x00007FFC4B540000-0x00007FFC4C001000-memory.dmp

Filesize
10.8MB

Download
memory/1300-23-0x00007FFC4B540000-0x00007FFC4C001000-memory.dmp

Filesize
10.8MB

Download
memory/2288-0-0x00007FFC4B543000-0x00007FFC4B545000-memory.dmp

Filesize
8KB

Download
memory/2288-1-0x0000000000200000-0x0000000000236000-memory.dmp

Filesize
216KB

Download
memory/2288-6-0x00007FFC4B540000-0x00007FFC4C001000-memory.dmp

Filesize
10.8MB

Download
memory/2288-7-0x00007FFC4B543000-0x00007FFC4B545000-memory.dmp

Filesize
8KB

Download
memory/2288-8-0x000000001B6C0000-0x000000001B7C2000-memory.dmp

Filesize
1.0MB

Download
memory/2288-9-0x000000001B7D0000-0x000000001B805000-memory.dmp

Filesize
212KB

Download
memory/2288-10-0x00007FFC4B540000-0x00007FFC4C001000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads