Overview

overview

10

Static

static

New#PO-910974.pdf.exe

windows7_x64

10

New#PO-910974.pdf.exe

windows10_x64

10

Sharing

Copy URL
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General

  • Target

    New#PO-910974.pdf.exe

  • Size

    136KB

  • Sample

    210420-1fv3cpw8bj

  • MD5

    a5927ee08778a03b9a85bdbe8614045c

  • SHA1

    b11323997a972820db34d5353f89327de427c2a7

  • SHA256

    5848b5efeea58c2c353b352f7f0d2043dc806cb9d387ca6206562773c95cb37e

  • SHA512

    60150f9a1a23685ecfce5359076d815359b62800d99ac580ea6c4272e85b5065365ef582eccc67e01c7db1128b37c6b76d3cc429bd47edade7468fa78db690a0

Score
10/10
guloaderoskidiscoverydownloaderguloaderinfostealerspywarestealer

Malware Config

Extracted

Family

guloader

C2

https://drive.google.com/uc?export=download&id=1Mt156cEQBM8iCmgCoxOvvzyFlkQ-bWCX

xor.base64

Extracted

Family

oski

C2

45.85.90.86

Targets

    • Target

      New#PO-910974.pdf.exe

    • Size

      136KB

    • MD5

      a5927ee08778a03b9a85bdbe8614045c

    • SHA1

      b11323997a972820db34d5353f89327de427c2a7

    • SHA256

      5848b5efeea58c2c353b352f7f0d2043dc806cb9d387ca6206562773c95cb37e

    • SHA512

      60150f9a1a23685ecfce5359076d815359b62800d99ac580ea6c4272e85b5065365ef582eccc67e01c7db1128b37c6b76d3cc429bd47edade7468fa78db690a0

    Score
    10/10
    guloaderoskidiscoverydownloaderguloaderinfostealerspywarestealer

    • Guloader,Cloudeye

      A shellcode based downloader first seen in 2020.

      downloaderguloader

    • Oski

      Oski is an infostealer targeting browser data, crypto wallets.

      infostealeroski

    • Guloader Payload

      guloader

    • Downloads MZ/PE file

    • Checks QEMU agent file

      Checks presence of QEMU agent, possibly to detect virtualization.

    • Deletes itself

    • Loads dropped DLL

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

      spywarestealer

    • Accesses cryptocurrency files/wallets, possible credential harvesting

      spyware

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

      discovery

    • Legitimate hosting services abused for malware hosting/C2

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

2
T1081

Discovery

Query Registry

3
T1012

System Information Discovery

3
T1082

Lateral Movement

Collection

Data from Local System

2
T1005

Exfiltration

Command and Control

Web Service

1
T1102

Impact

Tasks