ac333f7536d107ac4eed6e09e627bf44224333f51a37628eb8e87f5d85df6579

Analysis

max time kernel
120s
max time network
124s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
08-06-2024 11:34

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General

Target

blxstealer.pyc
Size

65KB
MD5

51ecf8f5fba0aeb23e48b8add0e49185
SHA1

f6459096cc5256907bc6c1928a658112eb7a4841
SHA256

02bb136818b3521667b447c0e46369324cb92487298654e235900f0eb56cfe30
SHA512

acfedbb6e2a5c8b667af5ae53e4b44ec0267dca1f7d7ac73e3468002993ec4c1091a6c807872d927b840a15c322346609176843f6df6a5a02cc3d0488df85ba1
SSDEEP

768:Mmd+ezrx+gRAwveI+aMXu1qFBoXwZukfyzbUbIknwEziuvfZS4/QmGVOwxAxxF3n:xdjzr7RAwMuHIyzI/ntPZS4/QmGCxbnX

Score

3^/10

Malware Config

Signatures

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies registry class 9 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000_CLASSES\.pyc\ = "pyc_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000_CLASSES\pyc_auto_file\shell\Read\command	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000_CLASSES\pyc_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000_CLASSES\pyc_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000_CLASSES\.pyc	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000_CLASSES\pyc_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000_CLASSES\pyc_auto_file\shell	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000_CLASSES\pyc_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3044	AcroRd32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3044	AcroRd32.exe
3044	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1640 wrote to memory of 2776	1640	cmd.exe	29
PID 1640 wrote to memory of 2776	1640	cmd.exe	29
PID 1640 wrote to memory of 2776	1640	cmd.exe	29
PID 2776 wrote to memory of 3044	2776	rundll32.exe	30
PID 2776 wrote to memory of 3044	2776	rundll32.exe	30
PID 2776 wrote to memory of 3044	2776	rundll32.exe	30
PID 2776 wrote to memory of 3044	2776	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\blxstealer.pyc
1⤵
- Suspicious use of WriteProcessMemory
PID:1640
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\blxstealer.pyc
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2776
- - 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\blxstealer.pyc"
    3⤵
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:3044

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

C:\Users\Admin\AppData\Roaming\Adobe\Acrobat\9.0\SharedDataEvents

Filesize
3KB

MD5
5d17785634d312d727842710c4c26c82

SHA1
543a0b0ed669405e343f9077a6c9adfb0e4c1b43

SHA256
34cf1be2aab3606a0de0cca20bdd476ec4d3022687e25a21487116023712f598

SHA512
60fbc896c24014b67c71f29f0407264f7eb6b46d3fbfc268c5d1bd82aeb1bafa7e0fa7db8467129cabd46c4b84af9f97bd26940901997fa345db9e4255bff0a5

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