xworm | 4b76ffab85b21d682a381fc59026c643b334d68bc46c43499c33da90070bcf47

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
28/02/2024, 23:12

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General

Target

rundll64.exe
Size

13.6MB
MD5

c012a0d5bcbf9404db18a5bd4d023da2
SHA1

023e94bb24f658c9eb1ebf2c4aa9942d9f85f5e9
SHA256

4b76ffab85b21d682a381fc59026c643b334d68bc46c43499c33da90070bcf47
SHA512

9954733c34d1c413e131b4249304c3eb130ff2e6d7a5cf30cd95fbfab4f1d7d0de0981b5a4c8a22f4a9ba663fcc00ed77a4c046eeae9b1db49fc302a5ffbea4e
SSDEEP

196608:Jw9X+yc8n5dHoIvymwddlIyNDggUgnwRz78MaPVMu0zZiT4RGMijcqJV5ppf18JD:JwAyF5dL5grMzYRPxkKZjD3zilK0

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

comes-bennett.gl.at.ply.gg:43941

Mutex

RHFq4tV0h4KMFvrJ

Attributes

Install_directory
%ProgramData%
install_file
USB.exe

aes.plain

Extracted

Family

xworm

lower-fisheries.gl.at.ply.gg:45093

Attributes

install_file
USB.exe
telegram
https://api.telegram.org/bot6840931665:AAGv7v7rX37B-ecRdyZwX93qMTKObEsmQ5o/sendMessage?chat_id=6840931665

Signatures

Detect Xworm Payload 5 IoCs

resource	yara_rule
behavioral1/files/0x000c000000012249-5.dat	family_xworm
behavioral1/memory/3060-7-0x0000000000F50000-0x0000000000F96000-memory.dmp	family_xworm
behavioral1/files/0x0035000000014701-22.dat	family_xworm
behavioral1/memory/2016-26-0x0000000001380000-0x0000000001398000-memory.dmp	family_xworm
behavioral1/memory/1440-48-0x0000000000BF0000-0x0000000000C36000-memory.dmp	family_xworm

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

Drops startup file 2 IoCs

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

Executes dropped EXE 5 IoCs

pid	Process
3060	MalcoreDesktopAgent.exe
2648	rundll32.exe
2016	injector.exe
1156	Process not Found
1440	DiscordUpdate

Loads dropped DLL 2 IoCs

pid	Process
2972	rundll64.exe
2972	rundll64.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-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Windows\CurrentVersion\Run\DiscordUpdate = "C:\\ProgramData\\DiscordUpdate"	MalcoreDesktopAgent.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
2	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

pid	Process
2800	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2592	timeout.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	3060	MalcoreDesktopAgent.exe
Token: SeDebugPrivilege	2016	injector.exe
Token: SeDebugPrivilege	2016	injector.exe
Token: SeDebugPrivilege	3060	MalcoreDesktopAgent.exe
Token: SeDebugPrivilege	1440	DiscordUpdate

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2972 wrote to memory of 3060	2972	rundll64.exe	28
PID 2972 wrote to memory of 3060	2972	rundll64.exe	28
PID 2972 wrote to memory of 3060	2972	rundll64.exe	28
PID 2972 wrote to memory of 2648	2972	rundll64.exe	29
PID 2972 wrote to memory of 2648	2972	rundll64.exe	29
PID 2972 wrote to memory of 2648	2972	rundll64.exe	29
PID 2972 wrote to memory of 2016	2972	rundll64.exe	30
PID 2972 wrote to memory of 2016	2972	rundll64.exe	30
PID 2972 wrote to memory of 2016	2972	rundll64.exe	30
PID 3060 wrote to memory of 2800	3060	MalcoreDesktopAgent.exe	33
PID 3060 wrote to memory of 2800	3060	MalcoreDesktopAgent.exe	33
PID 3060 wrote to memory of 2800	3060	MalcoreDesktopAgent.exe	33
PID 1592 wrote to memory of 1440	1592	taskeng.exe	35
PID 1592 wrote to memory of 1440	1592	taskeng.exe	35
PID 1592 wrote to memory of 1440	1592	taskeng.exe	35
PID 3060 wrote to memory of 1152	3060	MalcoreDesktopAgent.exe	38
PID 3060 wrote to memory of 1152	3060	MalcoreDesktopAgent.exe	38
PID 3060 wrote to memory of 1152	3060	MalcoreDesktopAgent.exe	38
PID 3060 wrote to memory of 996	3060	MalcoreDesktopAgent.exe	40
PID 3060 wrote to memory of 996	3060	MalcoreDesktopAgent.exe	40
PID 3060 wrote to memory of 996	3060	MalcoreDesktopAgent.exe	40
PID 996 wrote to memory of 2592	996	cmd.exe	42
PID 996 wrote to memory of 2592	996	cmd.exe	42
PID 996 wrote to memory of 2592	996	cmd.exe	42

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\rundll64.exe
"C:\Users\Admin\AppData\Local\Temp\rundll64.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2972
- C:\Users\Admin\MalcoreDesktopAgent.exe
  "C:\Users\Admin\MalcoreDesktopAgent.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3060
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "DiscordUpdate" /tr "C:\ProgramData\DiscordUpdate"
    3⤵
    - Creates scheduled task(s)
    PID:2800
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /delete /f /tn "DiscordUpdate"
    3⤵
    PID:1152
- - C:\Windows\system32\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpE292.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:996
  - - C:\Windows\system32\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:2592
- C:\Users\Admin\rundll32.exe
  "C:\Users\Admin\rundll32.exe"
  2⤵
  - Executes dropped EXE
  PID:2648
- C:\Users\Admin\injector.exe
  "C:\Users\Admin\injector.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2016

C:\Windows\system32\taskeng.exe
taskeng.exe {D6E1DD09-665C-428F-B485-F9AD9BF42270} S-1-5-21-2297530677-1229052932-2803917579-1000:HKULBIBU\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1592
- C:\ProgramData\DiscordUpdate
  C:\ProgramData\DiscordUpdate
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1440

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpE292.tmp.bat

Filesize
152B

MD5
11b40b7b6b5154ba13a40023f72ac7e8

SHA1
e4c547f2ece0efa1cc53adddc4e715b993afdb4b

SHA256
7922a0138031923f9786712bb6bc308ffed7573574b201f6664795361e37107f

SHA512
6b3f98bc00a069a6bd8b98149dae2cf11c6cc0887f9b4b4589195fd8ef4544b923206020e5680250394016d2a59c501818877bd01b420268029152a95fdc1033

Download Submit
C:\Users\Admin\MalcoreDesktopAgent.exe

Filesize
252KB

MD5
448000229f6de57909b72b61a2f5c129

SHA1
c9f59ba2634c515d2135b980c4c4d65c5940f5ce

SHA256
5a1feccf46313f7891194f8ce1746636901df99c8d536a8c6dacd81132a1a24a

SHA512
a68beb3bea313c9617135a5f01d2268a33354afca73427b5a4387c451afd49b085197e9c34b8afefbf5e1216a1b47b673f13b485a0b0ff104a3a56219eb7c4e1

Download Submit
C:\Users\Admin\injector.exe

Filesize
71KB

MD5
7d36a616a7569549a43b4275812eb2ab

SHA1
57411ea43664adb04d04a4a4205f19e20b33ef8a

SHA256
452c73c2996ff6fffc37b9e58aff5956de0557e83022e8c6fbb01d4e8b87310b

SHA512
f42123481d599490fa5893e2ccd7ec4856400efaae8d5e0f8e41a82f2d5f77a34bfbb66e1b0edbde8c0490ce924feada5cf69ab9ebb10df2564c1b9964eb3722

Download Submit
C:\Users\Admin\rundll32.exe

Filesize
3.8MB

MD5
443c29294547563a841d8552407adc8d

SHA1
c0931e05384859f96219240a2e6b83554ff82df5

SHA256
c60153e6c14d48b99a950ffd31b0253b76750e2ac512654d302b15c6b1113aab

SHA512
93f7f7f97a1cc3021e575249eb02f3844f7ee4d5b41541977e19b756c83caef0c87b4d092d1e60555749761c22c31efa686619e05b14a4846eea066d654cdb3d

Download Submit
C:\Users\Admin\rundll32.exe

Filesize
4.3MB

MD5
26d5dd4bb3d94bf607eb4b7dfe647bc6

SHA1
1e120593b62ef02800b8930a9ae7ecdb22c9dede

SHA256
154b3bcd525ea78f6482723c1cabb2cf46b0f2ae7c6f52a4acbe65a42cf094e1

SHA512
67a9dfb7e0856a067c5973269bfb688862c66fd7003daf87b92c4641ddc83a25561717ed2a31d890f3ff0d10dd149d319170a7b419c3b356def3e299d3e70653

Download Submit
C:\Users\Admin\rundll32.exe

Filesize
739KB

MD5
52ccbe0d0fd44b841449e6b20fd24d9b

SHA1
a884ce9cdc8f8247cc1263d39f1919922664328d

SHA256
58077c6f0889643b0036471ba2c406f768b073534e95449ad9c6b003c3fb9315

SHA512
6cba2a69dd054f5d3a48681d070affd990e0e5fb03d0c03baac4e60486b32bc2104b34847bfa063fd5d77791ad27433007891cf1d920af77af3fcdfe4c56f2ba

Download Submit
\Users\Admin\rundll32.exe

Filesize
3.9MB

MD5
386630bed7f65f6a3b193237234c9917

SHA1
283aca025b7d7bd7a07e08cf11dddb149897d8ba

SHA256
a8a3697f91a2110f38f937f868db1f3d4c196e024bd54aa6a19ee378cf707a44

SHA512
f5da5fb1be16a4a6f0339123556a472251a80353c3ffacb2f025af42f6407e872f6b2546411474a35115431653ce3fae67e5bfdd25a5ea221487536a87e86f2e

Download Submit
\Users\Admin\rundll32.exe

Filesize
3.4MB

MD5
83c61debb1d90465e22bbee60258e59e

SHA1
18ccfe3df7512d29468a02c4698f55b9ee45aee4

SHA256
de9e6838e0c50986bb36aabd17d19fab89be04a342707e5eda88d16729779122

SHA512
505f344a5746799487298d78af8e0169c836a3f1d496cc7344cd4f57973ad3b0e11a9d519ac170482c727312a92efa334e412cdcb967f69cf75bd4bb148c904e

Download Submit
\Users\Admin\rundll32.exe

Filesize
668KB

MD5
e14fce42101a6a23553689a732accf19

SHA1
61b7f9f6d2d7e3923b0bdc35dc42a3913b74f467

SHA256
af71da5ed500caae9b371105f09cd3ff21a229ff5e50c88846bffd143fd5289e

SHA512
459f44b3cc90394a61fd43eb5911317b1d0c4354ca29a65078cddc94059816c6b4356a2184804a5a88d2a8b17dcdb9709fc4c1debf0501f73605fffbd0e110af

Download Submit
memory/1440-50-0x000007FEF5F10000-0x000007FEF68FC000-memory.dmp

Filesize
9.9MB

Download
memory/1440-49-0x000007FEF5F10000-0x000007FEF68FC000-memory.dmp

Filesize
9.9MB

Download
memory/1440-48-0x0000000000BF0000-0x0000000000C36000-memory.dmp

Filesize
280KB

Download
memory/2016-38-0x0000000000530000-0x00000000005B0000-memory.dmp

Filesize
512KB

Download
memory/2016-26-0x0000000001380000-0x0000000001398000-memory.dmp

Filesize
96KB

Download
memory/2016-43-0x000007FEF5F10000-0x000007FEF68FC000-memory.dmp

Filesize
9.9MB

Download
memory/2016-25-0x000007FEF5F10000-0x000007FEF68FC000-memory.dmp

Filesize
9.9MB

Download
memory/2648-36-0x0000000140000000-0x0000000140D4C000-memory.dmp

Filesize
13.3MB

Download
memory/2648-28-0x0000000002EE0000-0x0000000005B95000-memory.dmp

Filesize
44.7MB

Download
memory/2648-24-0x0000000140000000-0x0000000140D4C000-memory.dmp

Filesize
13.3MB

Download
memory/2972-1-0x000007FEF5F10000-0x000007FEF68FC000-memory.dmp

Filesize
9.9MB

Download
memory/2972-23-0x0000000140000000-0x0000000140D4C000-memory.dmp

Filesize
13.3MB

Download
memory/2972-27-0x000007FEF5F10000-0x000007FEF68FC000-memory.dmp

Filesize
9.9MB

Download
memory/2972-19-0x0000000140000000-0x0000000140D4C000-memory.dmp

Filesize
13.3MB

Download
memory/2972-0-0x0000000001260000-0x0000000002004000-memory.dmp

Filesize
13.6MB

Download
memory/3060-37-0x000000001B1B0000-0x000000001B230000-memory.dmp

Filesize
512KB

Download
memory/3060-42-0x000007FEF5F10000-0x000007FEF68FC000-memory.dmp

Filesize
9.9MB

Download
memory/3060-44-0x000000001B1B0000-0x000000001B230000-memory.dmp

Filesize
512KB

Download
memory/3060-8-0x000007FEF5F10000-0x000007FEF68FC000-memory.dmp

Filesize
9.9MB

Download
memory/3060-7-0x0000000000F50000-0x0000000000F96000-memory.dmp

Filesize
280KB

Download
memory/3060-61-0x000007FEF5F10000-0x000007FEF68FC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads