xworm | 82549e9e27a539e6bfd29c015682f93c7aac81f35035146dd64312783e7a8008

General

Target

82549e9e27a539e6bfd29c015682f93c7aac81f35035146dd64312783e7a8008N.exe
Size

56KB
MD5

fae36591a84f55e92cb352a4324cb180
SHA1

64206e9b6e16e2e55db3e66f19024d31d87a0ad9
SHA256

82549e9e27a539e6bfd29c015682f93c7aac81f35035146dd64312783e7a8008
SHA512

520da9816801b36e5cefce3e64fd2ee8f34483a5298d60584224b3371f0b473d5402c19889067d2188aaf3db4b4382936b96509ab0eb34c7669676cae2c12f4f
SSDEEP

1536:ASFTU9xZVqGdtCfBXdi99iQTkbb4IJlqRp2OHLQ:ASFTUNVq04fBti91Tkbb8Rp2OHLQ

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

Cactus-33152.portmap.host:33152

Attributes

Install_directory
%AppData%
install_file
Teams.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/2080-1-0x0000000000B30000-0x0000000000B44000-memory.dmp	family_xworm
behavioral2/files/0x0002000000022af2-10.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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	82549e9e27a539e6bfd29c015682f93c7aac81f35035146dd64312783e7a8008N.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Teams.lnk	82549e9e27a539e6bfd29c015682f93c7aac81f35035146dd64312783e7a8008N.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Teams.lnk	82549e9e27a539e6bfd29c015682f93c7aac81f35035146dd64312783e7a8008N.exe

Executes dropped EXE 1 IoCs

pid	Process
368	Teams.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-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Teams = "C:\\Users\\Admin\\AppData\\Roaming\\Teams.exe"	82549e9e27a539e6bfd29c015682f93c7aac81f35035146dd64312783e7a8008N.exe

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
3480	schtasks.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2080	82549e9e27a539e6bfd29c015682f93c7aac81f35035146dd64312783e7a8008N.exe
Token: SeDebugPrivilege	2080	82549e9e27a539e6bfd29c015682f93c7aac81f35035146dd64312783e7a8008N.exe
Token: SeDebugPrivilege	368	Teams.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 2080 wrote to memory of 3480	2080	82549e9e27a539e6bfd29c015682f93c7aac81f35035146dd64312783e7a8008N.exe	91
PID 2080 wrote to memory of 3480	2080	82549e9e27a539e6bfd29c015682f93c7aac81f35035146dd64312783e7a8008N.exe	91

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\82549e9e27a539e6bfd29c015682f93c7aac81f35035146dd64312783e7a8008N.exe
"C:\Users\Admin\AppData\Local\Temp\82549e9e27a539e6bfd29c015682f93c7aac81f35035146dd64312783e7a8008N.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- 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 "Teams" /tr "C:\Users\Admin\AppData\Roaming\Teams.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3480

C:\Users\Admin\AppData\Roaming\Teams.exe
C:\Users\Admin\AppData\Roaming\Teams.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:368

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

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Teams.exe

Filesize
56KB

MD5
fae36591a84f55e92cb352a4324cb180

SHA1
64206e9b6e16e2e55db3e66f19024d31d87a0ad9

SHA256
82549e9e27a539e6bfd29c015682f93c7aac81f35035146dd64312783e7a8008

SHA512
520da9816801b36e5cefce3e64fd2ee8f34483a5298d60584224b3371f0b473d5402c19889067d2188aaf3db4b4382936b96509ab0eb34c7669676cae2c12f4f

Download Submit
memory/368-12-0x00007FFA2F170000-0x00007FFA2FC31000-memory.dmp

Filesize
10.8MB

Download
memory/368-14-0x00007FFA2F170000-0x00007FFA2FC31000-memory.dmp

Filesize
10.8MB

Download
memory/2080-0-0x00007FFA2F173000-0x00007FFA2F175000-memory.dmp

Filesize
8KB

Download
memory/2080-1-0x0000000000B30000-0x0000000000B44000-memory.dmp

Filesize
80KB

Download
memory/2080-6-0x00007FFA2F170000-0x00007FFA2FC31000-memory.dmp

Filesize
10.8MB

Download
memory/2080-7-0x00007FFA2F173000-0x00007FFA2F175000-memory.dmp

Filesize
8KB

Download
memory/2080-8-0x00007FFA2F170000-0x00007FFA2FC31000-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