cb1fa16f15aaef090a93ee7924607781bca317857aee6ef9e0a1fe34e3b38b5f

Analysis

max time kernel
151s
max time network
14s
platform
windows7_x64
resource
win7v20210408
submitted
27-06-2021 01:22

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General

Target

encodings/cp1257.pyc
Size

2KB
MD5

b601f8d41cfe2aaa0751cb0e74ec80f9
SHA1

b7650fa7e33a92f560fa64651fa925e21bf807df
SHA256

e788672ae4b9a6a5fc227a2ffc5364605662c413b5afb8f9f294ed90ac7db36c
SHA512

5f155a36c7e1bc10e9903d8be752935440b642d6fed8d0d23b13ffa4cd10b454df77b2c8640cae92ada4c97bb14a970464856d8cf12e39a190cb83f282e3e6e1

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-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\MuiCache	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\pyc_auto_file	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\.pyc	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\pyc_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\pyc_auto_file\shell\Read\command	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_Classes\Local Settings	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\.pyc\ = "pyc_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\pyc_auto_file\shell\Read	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\pyc_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\pyc_auto_file\	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

AcroRd32.exe

pid process

1664 AcroRd32.exe
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

AcroRd32.exe

pid process

1664 AcroRd32.exe
1664 AcroRd32.exe
1664 AcroRd32.exe

pid	process
1664	AcroRd32.exe

pid	process
1664	AcroRd32.exe
1664	AcroRd32.exe
1664	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

cmd.exerundll32.exe

description	pid	process	target process
PID 940 wrote to memory of 2016	940	cmd.exe	rundll32.exe
PID 940 wrote to memory of 2016	940	cmd.exe	rundll32.exe
PID 940 wrote to memory of 2016	940	cmd.exe	rundll32.exe
PID 2016 wrote to memory of 1664	2016	rundll32.exe	AcroRd32.exe
PID 2016 wrote to memory of 1664	2016	rundll32.exe	AcroRd32.exe
PID 2016 wrote to memory of 1664	2016	rundll32.exe	AcroRd32.exe
PID 2016 wrote to memory of 1664	2016	rundll32.exe	AcroRd32.exe

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\encodings\cp1257.pyc
1⤵
- Suspicious use of WriteProcessMemory
PID:940

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\encodings\cp1257.pyc
2⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2016

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\encodings\cp1257.pyc"
3⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
PID:1664

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/940-59-0x000007FEFB531000-0x000007FEFB533000-memory.dmp

Filesize
8KB

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memory/1664-63-0x0000000075051000-0x0000000075053000-memory.dmp

Filesize
8KB

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memory/1664-62-0x0000000000000000-mapping.dmp

Download
memory/2016-60-0x0000000000000000-mapping.dmp

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