Overview

overview

10

Static

static

2021BR04IS15.doc

windows7_x64

10

2021BR04IS15.doc

windows10_x64

1

Sharing

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General

  • Target

    2021BR04IS15.doc

  • Size

    1.4MB

  • Sample

    210415-j12plvfr4n

  • MD5

    dfaff4e0aad9296b882310322c211efa

  • SHA1

    7bd779022d831e957078f699119bb60290cde3db

  • SHA256

    e3148cf77b9313eb1fc2d9c76ff98ea77c878321beb56481f23f37e6c6199ee9

  • SHA512

    fe9058f368d0ae3b2fa7feba3b07d0610398ab4093df582757d8efb491dab72b72aa0d27728da0704f272a7b700cc51b7e9a09efeed652a19d7f95a5b9d9bace

Score
10/10
smokeloaderbackdoortrojan

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
ps1.dropper

httPs://paste.ee/r/Rbngj
ps1.dropper

httPs://paste.ee/r/ezAoz

Extracted

Family

smokeloader

Version

2018

C2

http://bristell.com/0/

rc4.i32
rc4.i32

Targets

    • Target

      2021BR04IS15.doc

    • Size

      1.4MB

    • MD5

      dfaff4e0aad9296b882310322c211efa

    • SHA1

      7bd779022d831e957078f699119bb60290cde3db

    • SHA256

      e3148cf77b9313eb1fc2d9c76ff98ea77c878321beb56481f23f37e6c6199ee9

    • SHA512

      fe9058f368d0ae3b2fa7feba3b07d0610398ab4093df582757d8efb491dab72b72aa0d27728da0704f272a7b700cc51b7e9a09efeed652a19d7f95a5b9d9bace

    Score
    10/10
    smokeloaderbackdoortrojan

    • SmokeLoader

      Modular backdoor trojan in use since 2014.

      trojanbackdoorsmokeloader

    • Blocklisted process makes network request

    • Executes dropped EXE

    • Loads dropped DLL

    • Maps connected drives based on registry

      Disk information is often read in order to detect sandboxing environments.

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Exploitation for Client Execution

1
T1203

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1
T1112

Credential Access

Discovery

Query Registry

3
T1012

Peripheral Device Discovery

1
T1120

System Information Discovery

3
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Tasks