joker | 4c939efdb415267afc2e9ab35223c554900d7cabf0c30de2c6b37ea71e533190 | Triage

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Overview

overview

Static

static

4c939efdb4...90.exe

windows7-x64

4c939efdb4...90.exe

windows10-2004-x64

Sharing

General

Target

4c939efdb415267afc2e9ab35223c554900d7cabf0c30de2c6b37ea71e533190
Size

168KB
Sample

220919-e1ed5sfhg8
MD5

40da5b273eb5dfdaff4e64d20b1c6c82
SHA1

0d571c661cbe62df84aae8ad5e47da8ce33d7437
SHA256

4c939efdb415267afc2e9ab35223c554900d7cabf0c30de2c6b37ea71e533190
SHA512

a02e7d052676f5471d5b0a2183e35ecfeca9d35c2f35b43a0063fff1a843f1cb3756cba64ec66e372b579dcab7667d9d59185db626444e915775077aa5a7d61d
SSDEEP

1536:KEQivQEwuyv+mMiIAkIxKmQHv51sksMDnHGIAYsMKWqD7WCDYVRazfjnfz++:nnYLuyv+mMi5kWbWH71AJM3IymYVmDJ

Score

10^/10

joker evasion infostealer persistence trojan

Static task

static1

Behavioral task

behavioral1

Sample

4c939efdb415267afc2e9ab35223c554900d7cabf0c30de2c6b37ea71e533190.exe

Resource

win7-20220812-en

joker evasion infostealer persistence trojan

windows7-x64

15 signatures

150 seconds

Behavioral task

behavioral2

Sample

4c939efdb415267afc2e9ab35223c554900d7cabf0c30de2c6b37ea71e533190.exe

Resource

win10v2004-20220812-en

joker evasion infostealer persistence trojan

windows10-2004-x64

16 signatures

150 seconds

Malware Config

Targets

- Target
  
  4c939efdb415267afc2e9ab35223c554900d7cabf0c30de2c6b37ea71e533190
- Size
  
  168KB
- MD5
  
  40da5b273eb5dfdaff4e64d20b1c6c82
- SHA1
  
  0d571c661cbe62df84aae8ad5e47da8ce33d7437
- SHA256
  
  4c939efdb415267afc2e9ab35223c554900d7cabf0c30de2c6b37ea71e533190
- SHA512
  
  a02e7d052676f5471d5b0a2183e35ecfeca9d35c2f35b43a0063fff1a843f1cb3756cba64ec66e372b579dcab7667d9d59185db626444e915775077aa5a7d61d
- SSDEEP
  
  1536:KEQivQEwuyv+mMiIAkIxKmQHv51sksMDnHGIAYsMKWqD7WCDYVRazfjnfz++:nnYLuyv+mMi5kWbWH71AJM3IymYVmDJ
Score

10^/10

joker evasion infostealer persistence trojan
- joker
  Joker is an Android malware that targets billing and SMS fraud.
  infostealer trojan joker
- Executes dropped EXE
- Sets file to hidden
  Modifies file attributes to stop it showing in Explorer etc.
  evasion
- Checks computer location settings
  Looks up country code configured in the registry, likely geofence.
- Adds Run key to start application
  persistence
behavioral1 behavioral2

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Hidden Files and Directories

Registry Run Keys / Startup Folder

Privilege Escalation

Defense Evasion

Hidden Files and Directories

Modify Registry

Credential Access

Discovery

Query Registry

System Information Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks

static1

behavioral1

jokerevasioninfostealerpersistencetrojan

behavioral2

jokerevasioninfostealerpersistencetrojan

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