Overview

overview

10

Static

static

3

readme2.txt.exe

windows11-21h2-x64

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General

  • Target

    readme2.txt.exe

  • Size

    25KB

  • Sample

    240705-wcwf7asdqq

  • MD5

    9f3d97d7cad1f049d92a5e0520004a91

  • SHA1

    6a69fd2813e16e036bba5261375e285244e2a361

  • SHA256

    296e2583c5d91e1c5c4c9f36cdd54ada7ee5e95585a9549799bba6b89f5d4d15

  • SHA512

    ecbadae5a1254bad3851462198454059100b8b78f770e7f8455f6fb80fee3dec586380832a76b1bc0fecd5ee8ad0a62268d8269ab9e555f83bd9a279951d0b69

  • SSDEEP

    768:tEHP8+xiXHShdO28nM41v18bVb/gm3Hrdn:tEHP8+x4SqgZ/X3x

Score
10/10
dharmadefense_evasionevasionexecutionimpactpersistenceprivilege_escalationransomwarespywarestealer

Malware Config

Targets

    • Target

      readme2.txt.exe

    • Size

      25KB

    • MD5

      9f3d97d7cad1f049d92a5e0520004a91

    • SHA1

      6a69fd2813e16e036bba5261375e285244e2a361

    • SHA256

      296e2583c5d91e1c5c4c9f36cdd54ada7ee5e95585a9549799bba6b89f5d4d15

    • SHA512

      ecbadae5a1254bad3851462198454059100b8b78f770e7f8455f6fb80fee3dec586380832a76b1bc0fecd5ee8ad0a62268d8269ab9e555f83bd9a279951d0b69

    • SSDEEP

      768:tEHP8+xiXHShdO28nM41v18bVb/gm3Hrdn:tEHP8+x4SqgZ/X3x

    Score
    10/10
    dharmadefense_evasionevasionexecutionimpactpersistenceprivilege_escalationransomwarespywarestealer

    • Dharma

      Dharma is a ransomware that uses security software installation to hide malicious activities.

      ransomwaredharma

    • Deletes shadow copies

      Ransomware often targets backup files to inhibit system recovery.

      ransomwaredefense_evasionimpactexecution

    • Enumerates VirtualBox registry keys

      evasion

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

      evasion

    • Looks for VirtualBox Guest Additions in registry

      evasion

    • Renames multiple (557) files with added filename extension

      This suggests ransomware activity of encrypting all the files on the system.

      ransomware

    • Downloads MZ/PE file

    • Looks for VMWare Tools registry key

      evasion

    • Checks BIOS information in registry

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

    • Deletes itself

    • Drops startup file

    • Executes dropped EXE

    • Identifies Wine through registry keys

      Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

      evasion

    • Reads user/profile data of web browsers

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

      spywarestealer

    • Adds Run key to start application

      persistence

    • Drops desktop.ini file(s)

    • Legitimate hosting services abused for malware hosting/C2

    • Drops file in System32 directory

    behavioral1

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Windows Management Instrumentation

1
T1047

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Event Triggered Execution

1
T1546

Accessibility Features

1
T1546.008

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Event Triggered Execution

1
T1546

Accessibility Features

1
T1546.008

Defense Evasion

Indicator Removal

2
T1070

File Deletion

2
T1070.004

Virtualization/Sandbox Evasion

5
T1497

Modify Registry

1
T1112

Direct Volume Access

1
T1006

Credential Access

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

Query Registry

9
T1012

Virtualization/Sandbox Evasion

5
T1497

System Information Discovery

5
T1082

Lateral Movement

Collection

Data from Local System

1
T1005

Exfiltration

Command and Control

Web Service

1
T1102

Impact

Inhibit System Recovery

2
T1490

Resource Development

Reconnaissance

Tasks