xworm | 1b2fee364fcde4a8e05a7f7a08f6fa68141e5ee6492a0ff23328d6e94a87925a

General

Target

1b2fee364fcde4a8e05a7f7a08f6fa68141e5ee6492a0ff23328d6e94a87925a.exe
Size

75KB
MD5

84db43a164ce3f375e38430aa3c817c5
SHA1

7e65f3e57b37f3b184666277df75f645d3a7cc19
SHA256

1b2fee364fcde4a8e05a7f7a08f6fa68141e5ee6492a0ff23328d6e94a87925a
SHA512

82f4c2a54a06cd00c47f19d55e9a6f09b2ce0047b9a861f1bb3b9f7272b29504fa98f385b3fc1dc7f1aaef90755ee1990aa0cf38b956db5504301cf72927212e
SSDEEP

1536:mgK9CZq03G5aXCTMu+oCAhb92SyPYKAOSLgqiOhABeuvXMMTy7O:xC2q03GtorMb92OOSgqiOoe2wO

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%AppData%
install_file
taskhostw.exe
pastebin_url
https://pastebin.com/raw/Xuc6dzua

Signatures

Detect Xworm Payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3692-1-0x0000000000250000-0x0000000000268000-memory.dmp	family_xworm
C:\Users\Admin\AppData\Roaming\taskhostw.exe	family_xworm

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

Drops startup file 2 IoCs

Processes:

1b2fee364fcde4a8e05a7f7a08f6fa68141e5ee6492a0ff23328d6e94a87925a.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\taskhostw.lnk	1b2fee364fcde4a8e05a7f7a08f6fa68141e5ee6492a0ff23328d6e94a87925a.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\taskhostw.lnk	1b2fee364fcde4a8e05a7f7a08f6fa68141e5ee6492a0ff23328d6e94a87925a.exe

Executes dropped EXE 2 IoCs

Processes:

taskhostw.exetaskhostw.exe

pid process

1636 taskhostw.exe
3096 taskhostw.exe

pid	process
1636	taskhostw.exe
3096	taskhostw.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

1b2fee364fcde4a8e05a7f7a08f6fa68141e5ee6492a0ff23328d6e94a87925a.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2457560273-69882387-977367775-1000\Software\Microsoft\Windows\CurrentVersion\Run\taskhostw = "C:\\Users\\Admin\\AppData\\Roaming\\taskhostw.exe"	1b2fee364fcde4a8e05a7f7a08f6fa68141e5ee6492a0ff23328d6e94a87925a.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service
T1102

Processes:

flow ioc

1 pastebin.com
3 pastebin.com
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

1 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

Processes:

schtasks.exe

pid process

4992 schtasks.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

1b2fee364fcde4a8e05a7f7a08f6fa68141e5ee6492a0ff23328d6e94a87925a.exe

pid process

3692 1b2fee364fcde4a8e05a7f7a08f6fa68141e5ee6492a0ff23328d6e94a87925a.exe

flow	ioc
1	pastebin.com
3	pastebin.com

flow	ioc
1	ip-api.com

pid	process
4992	schtasks.exe

pid	process
3692	1b2fee364fcde4a8e05a7f7a08f6fa68141e5ee6492a0ff23328d6e94a87925a.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

1b2fee364fcde4a8e05a7f7a08f6fa68141e5ee6492a0ff23328d6e94a87925a.exetaskhostw.exetaskhostw.exe

description	pid	process
Token: SeDebugPrivilege	3692	1b2fee364fcde4a8e05a7f7a08f6fa68141e5ee6492a0ff23328d6e94a87925a.exe
Token: SeDebugPrivilege	1636	taskhostw.exe
Token: SeDebugPrivilege	3096	taskhostw.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

1b2fee364fcde4a8e05a7f7a08f6fa68141e5ee6492a0ff23328d6e94a87925a.exe

pid process

3692 1b2fee364fcde4a8e05a7f7a08f6fa68141e5ee6492a0ff23328d6e94a87925a.exe

pid	process
3692	1b2fee364fcde4a8e05a7f7a08f6fa68141e5ee6492a0ff23328d6e94a87925a.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

1b2fee364fcde4a8e05a7f7a08f6fa68141e5ee6492a0ff23328d6e94a87925a.exe

description	pid	process	target process
PID 3692 wrote to memory of 4992	3692	1b2fee364fcde4a8e05a7f7a08f6fa68141e5ee6492a0ff23328d6e94a87925a.exe	schtasks.exe
PID 3692 wrote to memory of 4992	3692	1b2fee364fcde4a8e05a7f7a08f6fa68141e5ee6492a0ff23328d6e94a87925a.exe	schtasks.exe

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\1b2fee364fcde4a8e05a7f7a08f6fa68141e5ee6492a0ff23328d6e94a87925a.exe
"C:\Users\Admin\AppData\Local\Temp\1b2fee364fcde4a8e05a7f7a08f6fa68141e5ee6492a0ff23328d6e94a87925a.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3692
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "taskhostw" /tr "C:\Users\Admin\AppData\Roaming\taskhostw.exe"
  2⤵
  - Creates scheduled task(s)
  PID:4992

C:\Users\Admin\AppData\Roaming\taskhostw.exe
C:\Users\Admin\AppData\Roaming\taskhostw.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1636

C:\Users\Admin\AppData\Roaming\taskhostw.exe
C:\Users\Admin\AppData\Roaming\taskhostw.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3096

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

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

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

Filesize
654B

MD5
2cbbb74b7da1f720b48ed31085cbd5b8

SHA1
79caa9a3ea8abe1b9c4326c3633da64a5f724964

SHA256
e31b18f21621d9983bfdf1ea3e53884a9d58b8ffd79e0e5790da6f3a81a8b9d3

SHA512
ecf02d5240e0c1c005d3ab393aa7eff62bd498c2db5905157e2bf6d29e1b663228a9583950842629d1a4caef404c8941a0c7799b1a3bd1eb890a09fdb7efcff9

Download Submit
C:\Users\Admin\AppData\Roaming\taskhostw.exe

Filesize
75KB

MD5
84db43a164ce3f375e38430aa3c817c5

SHA1
7e65f3e57b37f3b184666277df75f645d3a7cc19

SHA256
1b2fee364fcde4a8e05a7f7a08f6fa68141e5ee6492a0ff23328d6e94a87925a

SHA512
82f4c2a54a06cd00c47f19d55e9a6f09b2ce0047b9a861f1bb3b9f7272b29504fa98f385b3fc1dc7f1aaef90755ee1990aa0cf38b956db5504301cf72927212e

Download Submit
memory/1636-11-0x00007FFAF6110000-0x00007FFAF6BD2000-memory.dmp

Filesize
10.8MB

Download
memory/1636-13-0x00007FFAF6110000-0x00007FFAF6BD2000-memory.dmp

Filesize
10.8MB

Download
memory/3692-0-0x00007FFAF6113000-0x00007FFAF6115000-memory.dmp

Filesize
8KB

Download
memory/3692-1-0x0000000000250000-0x0000000000268000-memory.dmp

Filesize
96KB

Download
memory/3692-2-0x00007FFAF6110000-0x00007FFAF6BD2000-memory.dmp

Filesize
10.8MB

Download
memory/3692-7-0x00007FFAF6113000-0x00007FFAF6115000-memory.dmp

Filesize
8KB

Download
memory/3692-8-0x00007FFAF6110000-0x00007FFAF6BD2000-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