58e8cf2a77663a1ff5cc36aa9e0777ce952eaa258c9b8220cadb5a53bed89724

Analysis

max time kernel
151s
max time network
33s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
05-02-2023 11:45

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General

Target

encodings/base64_codec.pyc
Size

2KB
MD5

9be24d15d41fa5fba1c8e7c880e8a21a
SHA1

55a2df810f08bc78e69677d9ecb86011c3f49b45
SHA256

5bf789a9d266b1efe934b3f72ac8d4918d3f230b8be5a75448c121de94e7dd28
SHA512

8e4a319db078049e696c2a8d2a19a5076f043cac2fbc7dddccfdc93e6a93a2c620b8c0d78dd23d10b236a4e11a2b7ca2cf4d669d0bdeec63266593b102c5cd6c

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-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\pyc_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\Software\Microsoft\Windows\Shell\MuiCache	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\pyc_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\pyc_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\.pyc	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\pyc_auto_file\shell\Read\command	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_Classes\Local Settings	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\.pyc\ = "pyc_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\pyc_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\pyc_auto_file\shell	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

AcroRd32.exe

pid process

1144 AcroRd32.exe
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

AcroRd32.exe

pid process

1144 AcroRd32.exe
1144 AcroRd32.exe
1144 AcroRd32.exe

pid	process
1144	AcroRd32.exe

pid	process
1144	AcroRd32.exe
1144	AcroRd32.exe
1144	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

cmd.exerundll32.exe

description	pid	process	target process
PID 1104 wrote to memory of 568	1104	cmd.exe	rundll32.exe
PID 1104 wrote to memory of 568	1104	cmd.exe	rundll32.exe
PID 1104 wrote to memory of 568	1104	cmd.exe	rundll32.exe
PID 568 wrote to memory of 1144	568	rundll32.exe	AcroRd32.exe
PID 568 wrote to memory of 1144	568	rundll32.exe	AcroRd32.exe
PID 568 wrote to memory of 1144	568	rundll32.exe	AcroRd32.exe
PID 568 wrote to memory of 1144	568	rundll32.exe	AcroRd32.exe

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\encodings\base64_codec.pyc
1⤵
- Suspicious use of WriteProcessMemory
PID:1104

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\encodings\base64_codec.pyc
2⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:568

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\base64_codec.pyc"
3⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
PID:1144

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

Replay Monitor

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Downloads

memory/568-76-0x0000000000000000-mapping.dmp

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memory/1104-54-0x000007FEFC201000-0x000007FEFC203000-memory.dmp

Filesize
8KB

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memory/1144-81-0x0000000000000000-mapping.dmp

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memory/1144-82-0x0000000075631000-0x0000000075633000-memory.dmp

Filesize
8KB

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