Overview

overview

10

Static

static

3

c38d70a8df...dN.exe

windows7-x64

10

c38d70a8df...dN.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    c38d70a8dfe6c78114028dcbe7e24381a5298af60decb7cd47e3204b6757a69dN

  • Size

    291KB

  • Sample

    241031-czz84sxhmj

  • MD5

    2142c9af71f9457bde9b686bb5026b40

  • SHA1

    945388f0679942e5d7e09002c196e7f6221bc138

  • SHA256

    c38d70a8dfe6c78114028dcbe7e24381a5298af60decb7cd47e3204b6757a69d

  • SHA512

    5518e3a0c4ecc3be651daf6c2e90e7d00820a5eabc1ed5659cbd3ef6037df2a56c8c098d319f4ba5cc803f197731023b731a26758271f4a3f746083102b166ba

  • SSDEEP

    6144:TBkkWqRq2Xlt7GqD7hetXXPgPmU7J0jw:SV2XlEc7h+P8mU7J3

Score
10/10
tofseediscoveryevasionexecutionpersistenceprivilege_escalationtrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      c38d70a8dfe6c78114028dcbe7e24381a5298af60decb7cd47e3204b6757a69dN

    • Size

      291KB

    • MD5

      2142c9af71f9457bde9b686bb5026b40

    • SHA1

      945388f0679942e5d7e09002c196e7f6221bc138

    • SHA256

      c38d70a8dfe6c78114028dcbe7e24381a5298af60decb7cd47e3204b6757a69d

    • SHA512

      5518e3a0c4ecc3be651daf6c2e90e7d00820a5eabc1ed5659cbd3ef6037df2a56c8c098d319f4ba5cc803f197731023b731a26758271f4a3f746083102b166ba

    • SSDEEP

      6144:TBkkWqRq2Xlt7GqD7hetXXPgPmU7J0jw:SV2XlEc7h+P8mU7J3

    Score
    10/10
    tofseediscoveryevasionexecutionpersistenceprivilege_escalationtrojan

    • Tofsee

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

      trojantofsee

    • Tofsee family

      tofsee

    • Windows security bypass

      evasiontrojan

    • Creates new service(s)

      persistenceexecution

    • 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 Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1
T1569

Service Execution

1
T1569.002

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Event Triggered Execution

1
T1546

Netsh Helper DLL

1
T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Event Triggered Execution

1
T1546

Netsh Helper DLL

1
T1546.007

Defense Evasion

Impair Defenses

2
T1562

Disable or Modify System Firewall

1
T1562.004

Disable or Modify Tools

1
T1562.001

Modify Registry

2
T1112

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks