donutloader | c92efb370eb4f2baa398743da50694df95eaae5c1513f2f63715eb64806e51eb

Analysis

max time kernel
178s
max time network
178s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260710-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260710-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
08/09/2026, 13:45

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General

Target
Tax_Notice-10.exe
Size 1.1MB
Sample260908-q2dpsacl7x
SHA256 c92efb370eb4f2baa398743da50694df95eaae5c1513f2f63715eb64806e51eb
MD5 c9aecbf4bbed5c38163f0bd15001613d
SHA1 5c875311dbc761c08dc604ef7fc13a18d56472ba
SHA512 9ec8ee624eacb142cefafdac2271e7820f0d8dd866fef23518edbc1d3c081ce2234b5ed8bc5bfc84201a4b0c5a646dcac2e2bbac735b01d1d6f3c5834528cf28
SSDEEP 24576:zGKuKkPztKt9cHPrLRAqKBAy1N1UGAmnnnFnnnZnnnGnnnsddodpbaQTIlXdodaT:zGKuKkPzgt9cHTLRAqK81kMbaQTIll
TLSH
T1DE453C1BE76245ECC56FC13883A78772A970785943347E2E1EA5DB222F50D60AF3E724
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/2104-20-0x000001D2DBBE0000-0x000001D2DC0CC000-memory.dmp	family_donutloader

Detects Overlord RAT 2 IoCs

resource	yara_rule
behavioral2/memory/2104-22-0x000001D2E00D0000-0x000001D2E2DE7000-memory.dmp	family_overlord
behavioral2/memory/4892-29-0x00000251AFAA0000-0x00000251B27B7000-memory.dmp	family_overlord

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-1-5-21-2246396966-3025826688-3847171515-1000\Software\Microsoft\Windows\CurrentVersion\Run\WindowsUpdate_bwI7 = "C:\\Users\\Admin\\AppData\\Local\\Microsoft\\Windows\\Explorer\\thumbcache_bwI7h6fN\\vlc.exe"	vlc.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
18	api.ipify.org

Executes dropped EXE 2 IoCs

pid	Process
2760	vlc.exe
6052	vlc.exe

Loads dropped DLL 2 IoCs

pid	Process
2760	vlc.exe
6052	vlc.exe

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-1-5-21-2246396966-3025826688-3847171515-1000\{0EA1163D-149E-4193-B9B4-7E1E0C2E2E44}	RuntimeBroker.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2356	Tax_Notice-10.exe
2356	Tax_Notice-10.exe
2760	vlc.exe
2760	vlc.exe
2760	vlc.exe
2760	vlc.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2104	RuntimeBroker.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2356 wrote to memory of 2760	2356	Tax_Notice-10.exe	90
PID 2760 wrote to memory of 2104	2760	vlc.exe	91
PID 2760 wrote to memory of 2104	2760	vlc.exe	91
PID 6052 wrote to memory of 4892	6052	vlc.exe	94
PID 6052 wrote to memory of 4892	6052	vlc.exe	94

C:\Users\Admin\AppData\Local\Temp\Tax_Notice-10.exe
"C:\Users\Admin\AppData\Local\Temp\Tax_Notice-10.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2356
- C:\Users\Admin\AppData\Local\Temp\thumbcache_1e357c6d\vlc.exe
  "C:\Users\Admin\AppData\Local\Temp\thumbcache_1e357c6d\vlc.exe"
  2⤵
  - Adds Run key to start application
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2760
- - C:\Windows\system32\RuntimeBroker.exe
    "C:\Windows\system32\RuntimeBroker.exe"
    3⤵
    - Checks processor information in registry
    - Modifies registry class
    - Suspicious behavior: GetForegroundWindowSpam
    PID:2104

C:\Users\Admin\AppData\Local\Microsoft\Windows\Explorer\thumbcache_bwI7h6fN\vlc.exe
C:\Users\Admin\AppData\Local\Microsoft\Windows\Explorer\thumbcache_bwI7h6fN\vlc.exe
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:6052
- C:\Windows\system32\RuntimeBroker.exe
  "C:\Windows\system32\RuntimeBroker.exe"
  2⤵
  PID:4892

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

settings.dat

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\Explorer\thumbcache_bwI7h6fN\settings.dat
Size 4.9MB
SHA256 74988ca7e885ab2b0b377906815d13c6c813d42a358c45bd2709fa9668b13072
MD5 46b824b6f97c514c104e57775abf3836
SHA1 d2628f99feb0f204885a3325afe11437f91d674e
SHA512 f0c07fa0a72bbb9d3757d8056c7a742a35c12e9e5e4dc23ddb0737d672f03193f942152354aae8f44199a2fc6d84b82d34765e273cc4037f8d00d17edc9b0915
SSDEEP 98304:zPNWS6qJpPDn87CpNsfGXIu5lZmKmyXz/TVFFjfMf4oFC/K7vRFRbgT:MS6Ypn87CpDXIMjmKmyD/RHfOdC/K7vu
TLSH
T19C36334E3831CA609ED16BF9DB9CF5A9B25164220C2F07F41AEE106441CE6DFEF9815E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

libvlc.dll

Path C:\Users\Admin\AppData\Local\Temp\thumbcache_1e357c6d\libvlc.dll
Size 113KB
SHA256 f0c3405b9d114c7380aed94260ddcbaf6c3587bb48c8fb05a508f6b1c96f3c84
MD5 f7c8e2d051ead5bb46f0f86555d0cee3
SHA1 a0cbea1f17c2bcbbc41eb27781dba9378572ee56
SHA512 67185088e3490c1bfe014b4f4b15fc306f1fe92962212e37a9f3b38b7027bf442ed0fbd09bd03c25a3ba02c0b9c56a5288bbc1d6a5e1c6a053755d706eb8257b
SSDEEP 3072:fbaSMKqILSdo7o+5qsTPKRpTsoAoSZys6d1ms6dt:fbaSoGTyRpTsoAoXd12dt
TLSH
T1D3B3C6036B89E048D266D63D82051B23D4F239553BA01B6E5B341FA53BF5CE63F3E4A9
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

vlc.exe

Path C:\Users\Admin\AppData\Local\Temp\thumbcache_1e357c6d\vlc.exe
Size 1021KB
SHA256 bfa5740f028a8f310ca01c779bbc5f2f1b435c41539c54de592f715bb0c10389
MD5 f0a4d5c3492115bfe2f346bc7bdce396
SHA1 bfcbdc7d0cbb92b68d348090fe9f381b4358a587
SHA512 8e4b2e1852fbc821cab4a7c16675afbfa2588472faa1848600829c415bfbee7cbf4713568ba15a76916e6c761d79b0fff7c5a1ae087aabd912bb7063d38a560a
SSDEEP 24576:uGKuKkPztKt9cHPrLRAqKBAy1N1UGAmnnnFnnnZnnnGnnnsddodt:uGKuKkPzgt9cHTLRAqK81k8
TLSH
T1A9254B1BE7A345EDC56FC13487A7C772AA30B86942347E2E1D95DB221F10E609F2E724
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2104-20-0x000001D2DBBE0000-0x000001D2DC0CC000-memory.dmp

Download

memory/2104-22-0x000001D2E00D0000-0x000001D2E2DE7000-memory.dmp

Download

memory/2356-5-0x00007FF653CA0000-0x00007FF653DCA000-memory.dmp

Download

memory/2760-8-0x00007FF69A879000-0x00007FF69A87A000-memory.dmp

Download

memory/2760-9-0x00007FF69A790000-0x00007FF69A893000-memory.dmp

Download

memory/2760-23-0x00007FF69A790000-0x00007FF69A893000-memory.dmp

Download

memory/4892-29-0x00000251AFAA0000-0x00000251B27B7000-memory.dmp

Download

memory/6052-28-0x00007FF76CBF0000-0x00007FF76CCF3000-memory.dmp

Download