Overview

overview

10

Static

static

35ca5ef18f...1d.exe

windows7_x64

1

35ca5ef18f...1d.exe

windows10-2004_x64

10

Sharing

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General

  • Target

    35ca5ef18f678a30569bbd438f6a5b1d.exe

  • Size

    177KB

  • Sample

    220605-j2rhbadddk

  • MD5

    35ca5ef18f678a30569bbd438f6a5b1d

  • SHA1

    487433c4c33f1af8b87045ebdc0df76b46c7b0dd

  • SHA256

    66dac97c59b5cacc0ff9ade1f96ea85f242eb327c4ad7a5b63e9bdc6e549ebe0

  • SHA512

    39947ece578b2e73fc1147597eba7c802f3e90f4aaa487bc6fec74ddc2f4cc8f7a640e397ad01c7cf3ee366f528de2b7f8fc1e4054a12dfda775eb9e96cefd37

Score
10/10
tofseexmrigevasionminerpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Targets

    • Target

      35ca5ef18f678a30569bbd438f6a5b1d.exe

    • Size

      177KB

    • MD5

      35ca5ef18f678a30569bbd438f6a5b1d

    • SHA1

      487433c4c33f1af8b87045ebdc0df76b46c7b0dd

    • SHA256

      66dac97c59b5cacc0ff9ade1f96ea85f242eb327c4ad7a5b63e9bdc6e549ebe0

    • SHA512

      39947ece578b2e73fc1147597eba7c802f3e90f4aaa487bc6fec74ddc2f4cc8f7a640e397ad01c7cf3ee366f528de2b7f8fc1e4054a12dfda775eb9e96cefd37

    Score
    10/10
    tofseexmrigevasionminerpersistencetrojan

    • Tofsee

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

      trojantofsee

    • xmrig

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

      minerxmrig

    • XMRig Miner Payload

      miner

    • Creates new service(s)

      persistence

    • Downloads MZ/PE file

    • Executes dropped EXE

    • 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.

    • 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

Modify Registry

1
T1112

Credential Access

Discovery

Query Registry

2
T1012

System Information Discovery

3
T1082

Peripheral Device Discovery

1
T1120

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Tasks