9f02093aac7808cb10582b4b2767aa16782f28d00b8b8e9c9d45196e00338cd7

Analysis

max time kernel
125s
max time network
127s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
03-10-2024 05:31

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General

Target

$R3/dvflekzd.dll
Size

328KB
MD5

ef63a544e38c3a3f1f40d51cdd67466b
SHA1

5f3e77446c880b9ddcce9dfb26442f2631d9b9b9
SHA256

f35d0b4b42d3c8800f146e96924be72e6c3c4cdf5eebd5ae59127e276bbc12cc
SHA512

83cdaac3504701319e07a14a18170813dd4914faa1b75e73ae5beeb23a44eb1cdee5b772d606de9938f99c4fe6808998677638970ed1c4639e58b5fa57effff9
SSDEEP

3072:x4YhwY/+JeDLUsVQ59c2fRHwjVHqM5IZrqTMa4sb8qLoE+1:nh0ItV01fWHP5Erta4sblV+

Score

6^/10

discovery persistence

Malware Config

Signatures

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-1-5-21-2170637797-568393320-3232933035-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\JavaSoft = "Rundll32.exe C:\\Users\\Admin\\AppData\\Local\\JavaSoft\\yhvowrhy.dll,FilterSetEffectID"	rundll32.exe

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Rundll32.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4600	rundll32.exe
4600	rundll32.exe
688	Rundll32.exe
688	Rundll32.exe
688	Rundll32.exe
688	Rundll32.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
4600	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
688	Rundll32.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2488 wrote to memory of 4600	2488	rundll32.exe	89
PID 2488 wrote to memory of 4600	2488	rundll32.exe	89
PID 2488 wrote to memory of 4600	2488	rundll32.exe	89
PID 4600 wrote to memory of 688	4600	rundll32.exe	90
PID 4600 wrote to memory of 688	4600	rundll32.exe	90
PID 4600 wrote to memory of 688	4600	rundll32.exe	90

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\$R3\dvflekzd.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2488
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\$R3\dvflekzd.dll,#1
  2⤵
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: RenamesItself
  - Suspicious use of WriteProcessMemory
  PID:4600
- - C:\Windows\SysWOW64\Rundll32.exe
    Rundll32.exe C:\Users\Admin\AppData\Local\JavaSoft\yhvowrhy.dll,FilterSetEffectID
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    PID:688

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=3956,i,5469445176230119590,7931734017267321834,262144 --variations-seed-version --mojo-platform-channel-handle=3988 /prefetch:8
1⤵
PID:2932

Network

MITRE ATT&CK Enterprise v15

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/688-1-0x0000000010000000-0x0000000010054000-memory.dmp

Filesize
336KB

Download
memory/688-2-0x0000000010000000-0x0000000010054000-memory.dmp

Filesize
336KB

Download
memory/4600-0-0x0000000010000000-0x0000000010054000-memory.dmp

Filesize
336KB

Download