83c23fc5b9c23e97b79c0e8a2fafd0fe61bcb8025b77bf1f56f60f8a5f90839c

Analysis

max time kernel
188s
max time network
52s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
29/11/2022, 13:00

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General

Target

yahooa/yahoof.class
Size

6KB
MD5

8ee401beaa5c19a88a942cda945ad73f
SHA1

12c0a35ea01b91abbfd0fba5fa8ba724139b4ed3
SHA256

1e27ed3115dcfd6b2254773c45b6d7ab68848d9dce167f243542a8f93e7e0e31
SHA512

1979fb439d89b916b77f843f6692f3b7d90a37306e9493eeeab42d4de069aecd74a45e421f401cda51e7778e7ae231b36d80610db1b173a8bb5f3847d2f09c61
SSDEEP

96:ImFGZCsomTRGt/Cmb5j8eTNgfkpk/9XO0870W:XkQ/JDTiXO0k

Score

3^/10

Malware Config

Signatures

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Modifies registry class 10 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\class_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\MuiCache	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\class_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\class_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\.class	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\class_auto_file\shell\Read\command	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_Classes\Local Settings	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\.class\ = "class_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\class_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\class_auto_file\shell	rundll32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1752	AcroRd32.exe
1752	AcroRd32.exe
1752	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1668 wrote to memory of 1296	1668	cmd.exe	29
PID 1668 wrote to memory of 1296	1668	cmd.exe	29
PID 1668 wrote to memory of 1296	1668	cmd.exe	29
PID 1296 wrote to memory of 1752	1296	rundll32.exe	30
PID 1296 wrote to memory of 1752	1296	rundll32.exe	30
PID 1296 wrote to memory of 1752	1296	rundll32.exe	30
PID 1296 wrote to memory of 1752	1296	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\yahooa\yahoof.class
1⤵
- Suspicious use of WriteProcessMemory
PID:1668
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\yahooa\yahoof.class
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:1296
- - C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe
    "C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe" "C:\Users\Admin\AppData\Local\Temp\yahooa\yahoof.class"
    3⤵
    - Suspicious use of SetWindowsHookEx
    PID:1752

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1668-54-0x000007FEFC201000-0x000007FEFC203000-memory.dmp

Filesize
8KB

Download
memory/1752-82-0x0000000075631000-0x0000000075633000-memory.dmp

Filesize
8KB

Download