xworm | 42f805aa109b4f82ced6ee3b43b74fdfd7b7770cbced3a493a74d2470abf43ca

General

Target

download.exe
Size

81KB
MD5

dc737cb6aefc2e14b47d8ac9ef3ad765
SHA1

af53fd19ad1e52e4d8eebd1ff4870cd1f73956ff
SHA256

42f805aa109b4f82ced6ee3b43b74fdfd7b7770cbced3a493a74d2470abf43ca
SHA512

1892f201979aed4b302d95e6e9e6f2ca9ed21121fe067e26e74618e73228340fcc6bb17126c0ed717d354ad968e25ba8b255879d1619454084c7e3f795ea7b0b
SSDEEP

1536:4fiCdy2/21CFLzR/jofU0WVUzT0bWg76uIUROLfcxj6VO3VhB2dZ:Wo2kiFosV80bVrIAOLCjoOFhO

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:56855

actually-partly.gl.at.ply.gg:56855

Attributes

Install_directory
%ProgramData%
install_file
dllhost.exe

Signatures

Detect Xworm Payload 5 IoCs

resource	yara_rule
behavioral1/memory/2404-1-0x0000000001230000-0x000000000124A000-memory.dmp	family_xworm
behavioral1/files/0x0004000000004ed7-7.dat	family_xworm
behavioral1/memory/2204-9-0x00000000008D0000-0x00000000008EA000-memory.dmp	family_xworm
behavioral1/memory/2856-11-0x0000000000D60000-0x0000000000D7A000-memory.dmp	family_xworm
behavioral1/memory/2232-13-0x0000000001060000-0x000000000107A000-memory.dmp	family_xworm

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

Executes dropped EXE 3 IoCs

pid	Process
2204	dllhost.exe
2856	dllhost.exe
2232	dllhost.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-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Windows\CurrentVersion\Run\dllhost = "C:\\ProgramData\\dllhost.exe"	download.exe

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
4	ip-api.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
2684	schtasks.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
2404	download.exe
2404	download.exe
2404	download.exe
2404	download.exe
2404	download.exe
2404	download.exe
2404	download.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2404	download.exe
Token: SeDebugPrivilege	2404	download.exe
Token: SeDebugPrivilege	2204	dllhost.exe
Token: SeDebugPrivilege	2856	dllhost.exe
Token: SeDebugPrivilege	2232	dllhost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2404	download.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2404 wrote to memory of 2684	2404	download.exe	32
PID 2404 wrote to memory of 2684	2404	download.exe	32
PID 2404 wrote to memory of 2684	2404	download.exe	32
PID 2660 wrote to memory of 2204	2660	taskeng.exe	35
PID 2660 wrote to memory of 2204	2660	taskeng.exe	35
PID 2660 wrote to memory of 2204	2660	taskeng.exe	35
PID 2660 wrote to memory of 2856	2660	taskeng.exe	36
PID 2660 wrote to memory of 2856	2660	taskeng.exe	36
PID 2660 wrote to memory of 2856	2660	taskeng.exe	36
PID 2660 wrote to memory of 2232	2660	taskeng.exe	37
PID 2660 wrote to memory of 2232	2660	taskeng.exe	37
PID 2660 wrote to memory of 2232	2660	taskeng.exe	37

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\download.exe
"C:\Users\Admin\AppData\Local\Temp\download.exe"
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2404
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "dllhost" /tr "C:\ProgramData\dllhost.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2684

C:\Windows\system32\taskeng.exe
taskeng.exe {B64D6BCB-57DE-412D-8ACF-7BC578F5C206} S-1-5-21-3551809350-4263495960-1443967649-1000:NNYJZAHP\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2660
- C:\ProgramData\dllhost.exe
  C:\ProgramData\dllhost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2204
- C:\ProgramData\dllhost.exe
  C:\ProgramData\dllhost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2856
- C:\ProgramData\dllhost.exe
  C:\ProgramData\dllhost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2232

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:\ProgramData\dllhost.exe

Filesize
81KB

MD5
dc737cb6aefc2e14b47d8ac9ef3ad765

SHA1
af53fd19ad1e52e4d8eebd1ff4870cd1f73956ff

SHA256
42f805aa109b4f82ced6ee3b43b74fdfd7b7770cbced3a493a74d2470abf43ca

SHA512
1892f201979aed4b302d95e6e9e6f2ca9ed21121fe067e26e74618e73228340fcc6bb17126c0ed717d354ad968e25ba8b255879d1619454084c7e3f795ea7b0b

Download Submit
memory/2204-9-0x00000000008D0000-0x00000000008EA000-memory.dmp

Filesize
104KB

Download
memory/2232-13-0x0000000001060000-0x000000000107A000-memory.dmp

Filesize
104KB

Download
memory/2404-0-0x000007FEF56A3000-0x000007FEF56A4000-memory.dmp

Filesize
4KB

Download
memory/2404-1-0x0000000001230000-0x000000000124A000-memory.dmp

Filesize
104KB

Download
memory/2404-2-0x000007FEF56A0000-0x000007FEF608C000-memory.dmp

Filesize
9.9MB

Download
memory/2404-4-0x000007FEF56A3000-0x000007FEF56A4000-memory.dmp

Filesize
4KB

Download
memory/2404-5-0x000007FEF56A0000-0x000007FEF608C000-memory.dmp

Filesize
9.9MB

Download
memory/2856-11-0x0000000000D60000-0x0000000000D7A000-memory.dmp

Filesize
104KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads