5121f08cf8614a65d7a86c2f462c0694c132e2877a7f54ab7fcefd7ee5235a42

Resubmissions

25-01-2022 11:10

220125-m9q4asfaa2 1

20-01-2022 18:56

220120-xlsx4abbe9 10

Analysis

max time kernel
150s
max time network
117s
platform
windows7_x64
resource
win7-en-20211208
submitted
20-01-2022 18:56

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General

Target

5121f08cf8614a65d7a86c2f462c0694c132e2877a7f54ab7fcefd7ee5235a42.bin
Size

1.8MB
MD5

843001980e5073c7f0ea8b56873246b8
SHA1

36dff07387cf3f2393339d30d0672fcbccc7a73c
SHA256

5121f08cf8614a65d7a86c2f462c0694c132e2877a7f54ab7fcefd7ee5235a42
SHA512

4b0ddafb90a68db39fdd6294b55c468f66d60e11c784f3ea2e6635b252e704aacc356d500dee78a324b001b05968b7539d140478fe4432cebaf95d1a4e15df3e

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
Key created	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000_CLASSES\.bin	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000_CLASSES\.bin\ = "bin_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000_CLASSES\bin_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000_CLASSES\bin_auto_file\shell\Read\command	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000_CLASSES\bin_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\bin_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000_CLASSES\bin_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000_CLASSES\bin_auto_file\shell\Read	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

AcroRd32.exe

pid process

1256 AcroRd32.exe
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

AcroRd32.exe

pid process

1256 AcroRd32.exe
1256 AcroRd32.exe
1256 AcroRd32.exe

pid	process
1256	AcroRd32.exe

pid	process
1256	AcroRd32.exe
1256	AcroRd32.exe
1256	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

cmd.exerundll32.exe

description	pid	process	target process
PID 1740 wrote to memory of 756	1740	cmd.exe	rundll32.exe
PID 1740 wrote to memory of 756	1740	cmd.exe	rundll32.exe
PID 1740 wrote to memory of 756	1740	cmd.exe	rundll32.exe
PID 756 wrote to memory of 1256	756	rundll32.exe	AcroRd32.exe
PID 756 wrote to memory of 1256	756	rundll32.exe	AcroRd32.exe
PID 756 wrote to memory of 1256	756	rundll32.exe	AcroRd32.exe
PID 756 wrote to memory of 1256	756	rundll32.exe	AcroRd32.exe

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\5121f08cf8614a65d7a86c2f462c0694c132e2877a7f54ab7fcefd7ee5235a42.bin
1⤵
- Suspicious use of WriteProcessMemory
PID:1740
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\5121f08cf8614a65d7a86c2f462c0694c132e2877a7f54ab7fcefd7ee5235a42.bin
  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\5121f08cf8614a65d7a86c2f462c0694c132e2877a7f54ab7fcefd7ee5235a42.bin"
    3⤵
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:1256

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/1256-56-0x0000000075D61000-0x0000000075D63000-memory.dmp

Filesize
8KB

Download
memory/1740-54-0x000007FEFBEE1000-0x000007FEFBEE3000-memory.dmp

Filesize
8KB

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