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 3 IoCs

resource	yara_rule
behavioral1/memory/2720-1-0x0000000000030000-0x0000000000044000-memory.dmp	family_xworm
behavioral1/files/0x000b000000012281-11.dat	family_xworm
behavioral1/memory/1584-13-0x0000000001290000-0x00000000012A4000-memory.dmp	family_xworm

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

Drops startup file 2 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
1584	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-1-5-21-1488793075-819845221-1497111674-1000\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
2676	schtasks.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2720	82549e9e27a539e6bfd29c015682f93c7aac81f35035146dd64312783e7a8008N.exe
Token: SeDebugPrivilege	2720	82549e9e27a539e6bfd29c015682f93c7aac81f35035146dd64312783e7a8008N.exe
Token: SeDebugPrivilege	1584	Teams.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2720 wrote to memory of 2676	2720	82549e9e27a539e6bfd29c015682f93c7aac81f35035146dd64312783e7a8008N.exe	31
PID 2720 wrote to memory of 2676	2720	82549e9e27a539e6bfd29c015682f93c7aac81f35035146dd64312783e7a8008N.exe	31
PID 2720 wrote to memory of 2676	2720	82549e9e27a539e6bfd29c015682f93c7aac81f35035146dd64312783e7a8008N.exe	31
PID 2872 wrote to memory of 1584	2872	taskeng.exe	34
PID 2872 wrote to memory of 1584	2872	taskeng.exe	34
PID 2872 wrote to memory of 1584	2872	taskeng.exe	34

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⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2720
- 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:2676

C:\Windows\system32\taskeng.exe
taskeng.exe {13F7ED71-9B20-46BF-9057-0B04DF9B6C54} S-1-5-21-1488793075-819845221-1497111674-1000:UPNECVIU\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2872
- C:\Users\Admin\AppData\Roaming\Teams.exe
  C:\Users\Admin\AppData\Roaming\Teams.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1584

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

1

T1012

System Information Discovery

1

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/1584-13-0x0000000001290000-0x00000000012A4000-memory.dmp

Filesize
80KB

Download
memory/2720-0-0x000007FEF5BB3000-0x000007FEF5BB4000-memory.dmp

Filesize
4KB

Download
memory/2720-1-0x0000000000030000-0x0000000000044000-memory.dmp

Filesize
80KB

Download
memory/2720-6-0x000007FEF5BB0000-0x000007FEF659C000-memory.dmp

Filesize
9.9MB

Download
memory/2720-7-0x000007FEF5BB3000-0x000007FEF5BB4000-memory.dmp

Filesize
4KB

Download
memory/2720-8-0x000007FEF5BB0000-0x000007FEF659C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads