e737c901b80ad9ed2cd800fec7c2554178c8afab196fb55a0df36acda1324721

General

Target

app/linux/decryptor.elf
Size

1.5MB
MD5

a39b4bea47c4d123f8195a3ffb638a1b
SHA1

e60ef891027ac1dade9562f8b1de866186338da1
SHA256

cdca6936b880ab4559d3d96101e38f0cf58b87d07b0c7bf708d078c2bf209460
SHA512

0d18fa871226bfc4b353e14e114b30af174a0161cd5af308d2c9bbe6f9ccca9689d92a6b0c571ba37a322aa92bb37ed8a3264ab61fda84fba0e777225b370215

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

Processes:

rundll32.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000_CLASSES\.elf\ = "elf_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000_CLASSES\elf_auto_file\shell	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000_CLASSES\elf_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\MuiCache	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000_CLASSES\elf_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000_CLASSES\elf_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000_CLASSES\.elf	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000_CLASSES\elf_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000_CLASSES\elf_auto_file\shell\Read\command	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

AcroRd32.exe

pid process

1644 AcroRd32.exe
1644 AcroRd32.exe

pid	process
1644	AcroRd32.exe
1644	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

cmd.exerundll32.exe

description	pid	process	target process
PID 1540 wrote to memory of 756	1540	cmd.exe	rundll32.exe
PID 1540 wrote to memory of 756	1540	cmd.exe	rundll32.exe
PID 1540 wrote to memory of 756	1540	cmd.exe	rundll32.exe
PID 756 wrote to memory of 1644	756	rundll32.exe	AcroRd32.exe
PID 756 wrote to memory of 1644	756	rundll32.exe	AcroRd32.exe
PID 756 wrote to memory of 1644	756	rundll32.exe	AcroRd32.exe
PID 756 wrote to memory of 1644	756	rundll32.exe	AcroRd32.exe

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\app\linux\decryptor.elf
1⤵
- Suspicious use of WriteProcessMemory
PID:1540
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\app\linux\decryptor.elf
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:756
- - 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\app\linux\decryptor.elf"
    3⤵
    - Suspicious use of SetWindowsHookEx
    PID:1644

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/756-55-0x0000000000000000-mapping.dmp

Download
memory/1540-54-0x000007FEFBE91000-0x000007FEFBE93000-memory.dmp

Filesize
8KB

Download
memory/1644-57-0x0000000000000000-mapping.dmp

Download
memory/1644-58-0x0000000075891000-0x0000000075893000-memory.dmp

Filesize
8KB

Download

Analysis

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