83c23fc5b9c23e97b79c0e8a2fafd0fe61bcb8025b77bf1f56f60f8a5f90839c

Analysis

max time kernel
187s
max time network
51s
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/yahooe.class
Size

9KB
MD5

5e063db937e792f88572401b498fed13
SHA1

9da038ff729691497da53167751a639620343b30
SHA256

6d1f6b9da696f257f8d86133727f08ae7b396a3014bb005be3b88a523e59fcb9
SHA512

c012249d78048eee5cd6e78a0c993ee415116cda79f6d9a699c7804055537848bbc382fd32dac904e65d4d91f7c860ccaacef4c525719897e3df932a1cab1368
SSDEEP

192:06EeO6z94wMegPWPe7sxvuXKwf32uEuHVaf+0o/TrcH6Ey2NXX:7P8wgFa432udHVaG04gHq25X

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\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\class_auto_file\shell	rundll32.exe
Key created	\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\Local Settings\Software\Microsoft\Windows\Shell\MuiCache	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\.class	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\Read\command	rundll32.exe
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	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1568	AcroRd32.exe
1568	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 556 wrote to memory of 1444	556	cmd.exe	29
PID 556 wrote to memory of 1444	556	cmd.exe	29
PID 556 wrote to memory of 1444	556	cmd.exe	29
PID 1444 wrote to memory of 1568	1444	rundll32.exe	30
PID 1444 wrote to memory of 1568	1444	rundll32.exe	30
PID 1444 wrote to memory of 1568	1444	rundll32.exe	30
PID 1444 wrote to memory of 1568	1444	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\yahooa\yahooe.class
1⤵
- Suspicious use of WriteProcessMemory
PID:556
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\yahooa\yahooe.class
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:1444
- - 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\yahooe.class"
    3⤵
    - Suspicious use of SetWindowsHookEx
    PID:1568

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/556-54-0x000007FEFB8F1000-0x000007FEFB8F3000-memory.dmp

Filesize
8KB

Download
memory/1568-82-0x0000000074FD1000-0x0000000074FD3000-memory.dmp

Filesize
8KB

Download