Overview

overview

10

Static

static

3

204063581a...51.exe

windows7-x64

10

204063581a...51.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    8d7795e565558f472cef93c4d960ba71676d4a1fd45ddd6d7912223878a8285b

  • Size

    166KB

  • Sample

    240417-qv874sbd41

  • MD5

    c0407a73aa3aabd7f06c0082770e70bf

  • SHA1

    05e4d8cefffdf347af32d30cd61cf0fef6d0ff22

  • SHA256

    8d7795e565558f472cef93c4d960ba71676d4a1fd45ddd6d7912223878a8285b

  • SHA512

    323788b0b39c31c4ee63d8afd055a0c90f02521247438536edf8eb8ece63b160d2414c56b2457e038b5cf9c65a0b104fe7415cc851ace51eac90354594e2367a

  • SSDEEP

    3072:Qiec6mlBLsdZFjohTmcpjDuF8/Laq5SdiG34ktnuFGs2UPIaPKVPV2GJSA:9ecXhcF4TfpQMbSd14nFGslPIZZ1b

Score
10/10
tofseeevasionpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      204063581a5aac527fc0be421097ddc37b338cedced74ca6858f88f3d31bcc51.exe

    • Size

      303KB

    • MD5

      09e86355c9c595720b5a6154426c9910

    • SHA1

      83b66aaab60f02c75b43ce10e5b77ba87646e2e7

    • SHA256

      204063581a5aac527fc0be421097ddc37b338cedced74ca6858f88f3d31bcc51

    • SHA512

      4072e6ee0e6535ea9787ca8e38061bf72a9c962f1018117beb5c1869e7c7ca74272e6f7dd7f326fe93ced3f8eee44a59ed7330691ab67b709e2601610a29693b

    • SSDEEP

      6144:H8prBAyFXYy/6LDrWvzVYWMsfKaA9Vpwpp69a:Hi0y/6LDiuWMSFeCII

    Score
    10/10
    tofseeevasionpersistencetrojan

    • Tofsee

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

      trojantofsee

    • Windows security bypass

      evasiontrojan

    • 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 v13

Initial Access

Execution

Persistence

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Privilege Escalation

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Defense Evasion

Impair Defenses

2
T1562

Disable or Modify Tools

1
T1562.001

Disable or Modify System Firewall

1
T1562.004

Modify Registry

2
T1112

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Tasks