blister | f9508e81f1ac31569646fde9e864e25212457ca62ac768e23fbb95c290950e99

Analysis

max time kernel
121s
max time network
161s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
05-09-2022 15:50

Target

1fe05e5f8237f2c9c6b079eaf4f1e21aea96b1a092a66bf3ab9633a59c50c6ec.exe
Size

3.0MB
MD5

9dfa2a3209ce891b5eec9d4842333be4
SHA1

fb99c6ca952a0c01f612558949af0013147e29dc
SHA256

1fe05e5f8237f2c9c6b079eaf4f1e21aea96b1a092a66bf3ab9633a59c50c6ec
SHA512

5b01d24a38720b0a4cbbd73a832cd0eadeb3780afa56bb0b76f1b5883c64bf50e8fffdf8e7d3147316dba93fe66911779a7c57327c48dc816078a63fae0f2814
SSDEEP

98304:MwM1roHir0Z7ENrna5AT/qDj6v3lBu7fWlM:MwM1sHW0ZI+AjqX6v3lByeS

Score

10^/10

blister loader

BLISTER
BLISTER is a downloader used to deliver other malware families.
loader blister

Detect Blister loader x32 2 IoCs

loader

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\lib_npp\libcef.dll	family_blister_x32
C:\Users\Admin\AppData\Local\Temp\lib_npp\libcef.dll	family_blister_x32

Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

4128 rundll32.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

pid	process
4128	rundll32.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

1fe05e5f8237f2c9c6b079eaf4f1e21aea96b1a092a66bf3ab9633a59c50c6ec.exeRundll32.exe

description	pid	process	target process
PID 5104 wrote to memory of 4708	5104	1fe05e5f8237f2c9c6b079eaf4f1e21aea96b1a092a66bf3ab9633a59c50c6ec.exe	Rundll32.exe
PID 5104 wrote to memory of 4708	5104	1fe05e5f8237f2c9c6b079eaf4f1e21aea96b1a092a66bf3ab9633a59c50c6ec.exe	Rundll32.exe
PID 4708 wrote to memory of 4128	4708	Rundll32.exe	rundll32.exe
PID 4708 wrote to memory of 4128	4708	Rundll32.exe	rundll32.exe
PID 4708 wrote to memory of 4128	4708	Rundll32.exe	rundll32.exe

C:\Users\Admin\AppData\Local\Temp\1fe05e5f8237f2c9c6b079eaf4f1e21aea96b1a092a66bf3ab9633a59c50c6ec.exe
"C:\Users\Admin\AppData\Local\Temp\1fe05e5f8237f2c9c6b079eaf4f1e21aea96b1a092a66bf3ab9633a59c50c6ec.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:5104
- C:\Windows\SYSTEM32\Rundll32.exe
  Rundll32.exe C:\Users\Admin\AppData\Local\Temp\lib_npp\libcef.dll,cef_request_create
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4708
- - C:\Windows\SysWOW64\rundll32.exe
    Rundll32.exe C:\Users\Admin\AppData\Local\Temp\lib_npp\libcef.dll,cef_request_create
    3⤵
    - Loads dropped DLL
    PID:4128

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

C:\Users\Admin\AppData\Local\Temp\lib_npp\libcef.dll

Filesize
23.4MB

MD5
c71c924a43a18b3a640d671b42120857

SHA1
7a386c1f47e8e1ef9570b9da4ca1d7434a887a6f

SHA256
5651e8a8e6f9c63c4c1162efadfcb4cdd9ad634c5e00a5ab03259fcdeaa225ac

SHA512
43dc58c8c3b4edaca27e86286dd4281b7dcc57db9b66e9b9fcc055420b44a54a94c32cce20dfb2cabf791d8e8e9e83a3654a94e1fb2a14bd62b955191e95b311

Download Submit
C:\Users\Admin\AppData\Local\Temp\lib_npp\libcef.dll

Filesize
23.4MB

MD5
c71c924a43a18b3a640d671b42120857

SHA1
7a386c1f47e8e1ef9570b9da4ca1d7434a887a6f

SHA256
5651e8a8e6f9c63c4c1162efadfcb4cdd9ad634c5e00a5ab03259fcdeaa225ac

SHA512
43dc58c8c3b4edaca27e86286dd4281b7dcc57db9b66e9b9fcc055420b44a54a94c32cce20dfb2cabf791d8e8e9e83a3654a94e1fb2a14bd62b955191e95b311

Download Submit
memory/4128-134-0x0000000000000000-mapping.dmp

Download
memory/4708-132-0x0000000000000000-mapping.dmp

Download