Overview

overview

10

Static

static

PST0987321.exe

windows7_x64

10

PST0987321.exe

windows10-2004_x64

10

Sharing

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General

  • Target

    590279b782c6ad660c2d1aa229215c70a93edc2fa27d1fcb7e19b573d7c14b64

  • Size

    21KB

  • Sample

    220521-w8kdssbbf2

  • MD5

    479a382089f4add22d5143b2ff4b0d64

  • SHA1

    31efa77527c0b33efb5c7388cdaea7a2f25cc60e

  • SHA256

    590279b782c6ad660c2d1aa229215c70a93edc2fa27d1fcb7e19b573d7c14b64

  • SHA512

    1f45deece2aa91bb9831543bedfdb7c330c416294adaad009b2df73e5fdeb6f57e87c5b071e29872d402436a12afe665a46dc3cfdbad5e590ab7540ddddd676b

Score
10/10
guloaderdownloaderpersistence

Malware Config

Extracted

Family

guloader

C2

https://firebasestorage.googleapis.com/v0/b/soosme-3cbe1.appspot.com/o/uol_uQbWNhgG61.bin?alt=media&token=c7bb058a-2bcf-4103-b67e-00156c3a01be

xor.base64

Targets

    • Target

      PST0987321.bat

    • Size

      88KB

    • MD5

      8975285b48e798c40cb8ec576a84a188

    • SHA1

      dfaaa26f8a280774548d6792d3b403bdac8dd35a

    • SHA256

      d8fa1f011d7743b7ca0c824e760d6588627b7b8084d5a479f971190ef094561c

    • SHA512

      47d2a704081c446915216cef100957881f4be1778c3f2ec1ec5c06f82096c69f60c9bc2b9d32c6ec8ffeddb3c6f56fc1e9cc53590dad9730244fe0c7c1ecf6a7

    Score
    10/10
    guloaderdownloaderpersistence

    • Guloader,Cloudeye

      A shellcode based downloader first seen in 2020.

      downloaderguloader

    • Executes dropped EXE

    • Checks QEMU agent state file

      Checks state file used by QEMU agent, possibly to detect virtualization.

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Loads dropped DLL

    • Adds Run key to start application

      persistence

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

1
T1497

Modify Registry

1
T1112

Credential Access

Discovery

Query Registry

2
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Tasks