Overview

overview

10

Static

static

1

file.exe

windows7-x64

10

file.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    file.exe

  • Size

    299KB

  • Sample

    230206-x6pfeaag6v

  • MD5

    a21bdfec619934728706de4bf42f4d7c

  • SHA1

    d8dfcfb85ca4b68219a3329b90f400a76dc4dba8

  • SHA256

    49d8d8aefa86738d67fdb9600d9150126573954f1c062a7a14c76a0d1d2539a5

  • SHA512

    e28798a28b7e2199c4c933452c934462d2a96a8974de947bbbbb7207f59c49001c854c3fc59fa8b4fadca120b47ed025b1a1e3016ebde5565d91cf54cb5a5b79

  • SSDEEP

    6144:C9jtL3d9QwGi6eL78QYvNC4GuQj9LA9a:C9tD8w96K71cN6ljNe

Score
10/10
tofseexmrigevasionminerpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Targets

    • Target

      file.exe

    • Size

      299KB

    • MD5

      a21bdfec619934728706de4bf42f4d7c

    • SHA1

      d8dfcfb85ca4b68219a3329b90f400a76dc4dba8

    • SHA256

      49d8d8aefa86738d67fdb9600d9150126573954f1c062a7a14c76a0d1d2539a5

    • SHA512

      e28798a28b7e2199c4c933452c934462d2a96a8974de947bbbbb7207f59c49001c854c3fc59fa8b4fadca120b47ed025b1a1e3016ebde5565d91cf54cb5a5b79

    • SSDEEP

      6144:C9jtL3d9QwGi6eL78QYvNC4GuQj9LA9a:C9tD8w96K71cN6ljNe

    Score
    10/10
    tofseeevasionpersistencetrojanxmrigminer

    • Tofsee

      Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

      trojantofsee

    • Windows security bypass

      evasiontrojan

    • xmrig

      XMRig is a high performance, open source, cross platform CPU/GPU miner.

      minerxmrig

    • XMRig Miner payload

      miner

    • Creates new service(s)

      persistence

    • Modifies Windows Firewall

      evasion

    • Sets service image path in registry

      persistence

    • Checks computer location settings

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

    • Deletes itself

    • Executes dropped EXE

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

New Service

1
T1050

Modify Existing Service

1
T1031

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

New Service

1
T1050

Defense Evasion

Disabling Security Tools

1
T1089

Modify Registry

2
T1112

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Tasks