Overview

overview

10

Static

static

f8a2e41ea8...6b.exe

windows7_x64

10

f8a2e41ea8...6b.exe

windows10-2004_x64

10

Sharing

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General

  • Target

    7545916155.zip

  • Size

    144KB

  • Sample

    220606-hg8enaedf3

  • MD5

    f0dbf8defaa200d01571a84f73ffb615

  • SHA1

    e85085d3f50d0128c7b3eebf96b95bb690f505f1

  • SHA256

    af2bdcb67b12da634eebb5783619cd4f87230999fe61ea70dfe91030984bfbf1

  • SHA512

    799d150fa4a1dfec6cd66e22de7b1844c1c38885c8287661435432e32d0cc567266cc764fc0e98d93340d62c4999b25a062ae1b9913e4e651964685274160748

Score
10/10
tofseexmrigevasionminerpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

niflheimr.cn

jotunheim.name

Targets

    • Target

      f8a2e41ea8ca0e998bcd54d8256cb538b1e32cec4e80eb810e8df003427b886b

    • Size

      279KB

    • MD5

      d30b3148cfa81c0120ff7e263d08440e

    • SHA1

      6a2d819acfffebbfd48984dff663ca14ca49fe77

    • SHA256

      f8a2e41ea8ca0e998bcd54d8256cb538b1e32cec4e80eb810e8df003427b886b

    • SHA512

      413c082854b1cea4735daefa14d5f99d763482009382bf80706201ef94d4bd59f4777fd0ebda444d8bbaeba8bef6192f643e710796e077cfdc42f982e1d4e520

    Score
    10/10
    tofseexmrigevasionminerpersistencetrojan

    • 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

    • 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.

    • Deletes itself

    • 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