donutloader | 61df4487225b6af0d2bcc6e4332603d82c72d9a058517b208eeb89533ff3f02d

Analysis

max time kernel
598s
max time network
597s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-ja
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-jalocale:ja-jpos:windows11-ltsc_2024-x64systemwindows
submitted
15/09/2026, 06:51

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General

Target
event.dll
Size 52KB
Sample260915-hmt48ashld
SHA256 61df4487225b6af0d2bcc6e4332603d82c72d9a058517b208eeb89533ff3f02d
MD5 f1a1e3a52a55d3dfc6d228f23c9806c5
SHA1 77ac9052284474288b1392532d66f33c5370a9c7
SHA512 bc2eb5834e0324e8368626e669378ead1161dbd46febdb4aaa0d006d6bc2aa957d7773e1ce57250f95264215251fb639a0e5a448ea0c4d38291cfcaaede83b2f
SSDEEP 1536:pK9PQ84hwc64bcecZEklVFhuAnzSbH+lP7x+:pK9PpYTFgecZEklfhugzKH+lPE
TLSH
T19D33F806668668EDD426C53542176B23E5B2B848A77079EF07F0CF257EA0ED1373C6C6
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery donutloader overlord loader persistence rat

Malware Config

Signatures

Family: DonutLoader
DonutLoader is a position-independent code that enables in-memory execution of VBScript, JScript, EXE, DLL files and dotNET assemblies.
loader donutloader
Family: Overlord
Overlord is an open-source Windows RAT written in Golang.
rat overlord

Detects DonutLoader 1 IoCs

loader

resource	yara_rule
behavioral2/memory/4044-11-0x0000028203E20000-0x0000028204543000-memory.dmp	family_donutloader

Detects Overlord RAT 1 IoCs

resource	yara_rule
behavioral2/memory/4044-13-0x0000028208820000-0x000002820BB97000-memory.dmp	family_overlord

Badlisted process makes network request 5 IoCs

Network request originating from process or tool commonly abused by malware.

flow	pid	Process
2	1896	rundll32.exe
3	1896	rundll32.exe
4	1896	rundll32.exe
5	1896	rundll32.exe
6	1896	rundll32.exe

Executes dropped EXE 1 IoCs

pid	Process
4592	ExplorerBroker.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-1-5-21-696679853-3915825385-3233721679-1000\Software\Microsoft\Windows\CurrentVersion\Run\WindowsUpdate_Ryxg = "C:\\Users\\Admin\\AppData\\Local\\Microsoft\\Windows\\Explorer\\thumbcache_RyxgOEyP\\ExplorerBroker.exe"	rundll32.exe

Looks up external IP address via web service 1 TTPs 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

discovery

Internet Connection Discovery

T1016.001

flow	ioc
1	api.ipify.org
9	api.ipify.org

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	RuntimeBroker.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	RuntimeBroker.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\Deployment\Package\*\S-1-5-21-696679853-3915825385-3233721679-1000\{97757F49-A8AA-4572-AC9C-3452B2BC449F}	RuntimeBroker.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1896	rundll32.exe
1896	rundll32.exe
1896	rundll32.exe
1896	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4044	RuntimeBroker.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 1896 wrote to memory of 4044	1896	rundll32.exe	88
PID 1896 wrote to memory of 4044	1896	rundll32.exe	88

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\event.dll,#1
1⤵
- Badlisted process makes network request
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1896
- C:\Windows\system32\RuntimeBroker.exe
  "C:\Windows\system32\RuntimeBroker.exe"
  2⤵
  - Checks processor information in registry
  - Modifies registry class
  - Suspicious behavior: GetForegroundWindowSpam
  PID:4044

C:\Users\Admin\AppData\Local\Microsoft\Windows\Explorer\thumbcache_RyxgOEyP\ExplorerBroker.exe
C:\Users\Admin\AppData\Local\Microsoft\Windows\Explorer\thumbcache_RyxgOEyP\ExplorerBroker.exe
1⤵
- Executes dropped EXE
PID:4592

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

ExplorerBroker.exe

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\Explorer\thumbcache_RyxgOEyP\ExplorerBroker.exe
Size 88KB
SHA256 4b84dc6750937eb47b19cde0d23debd4d2f2211300171b36d13ef5ad11dd60f9
MD5 025b13bf5652712d9b596e6766a9c386
SHA1 def4011b5536983285472ba75c22c6a2410edf6a
SHA512 f9983b897ef7ecbeb6cbfe599b24f5aa8651058d2e3313534a2a5e076f93fc3354784c05260b42fa828e48a55b5c005bfaa9db4e387351bf2e665ea0245c3a1e
SSDEEP 1536:7i3jG+UJuhM2HLJPl1M8CFYNMjYrZ3bXWgmqR9jR:KkuB5GFYNME3C9KR
TLSH
T11993185E72A830E5E9369139C4A24605E3B1B03563135BFF06E0C2BD5F23AE5AD39F91
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4044-11-0x0000028203E20000-0x0000028204543000-memory.dmp

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memory/4044-13-0x0000028208820000-0x000002820BB97000-memory.dmp

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memory/4044-15-0x00000282535C0000-0x0000028253C40000-memory.dmp

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