Overview

overview

10

Static

static

3

87092af98b...dc.exe

windows7-x64

10

87092af98b...dc.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    87092af98b1cd578e4f5d454634a6da8838a1ce5aa983646c2ca907e7e8a9adc

  • Size

    239KB

  • Sample

    240719-qszwnaxbjb

  • MD5

    17fe9cfc87e8f07c6c4b081e17856028

  • SHA1

    1268c4b05b12e12c6684f4c2de48556e3631f339

  • SHA256

    87092af98b1cd578e4f5d454634a6da8838a1ce5aa983646c2ca907e7e8a9adc

  • SHA512

    14af42343b34f319756842b1a4c75fb901bb1372b2d4f3f3f554b727799b2f7fa039b3608318b80bfd87781b9643e29cc183f5fe3e47c6c914d4fe7bbe4ccf0f

  • SSDEEP

    6144:Y9HP+2OttoeF95UVV1AW5C1xZyhecCTflc:02Dd5Un1DaxZvcf

Score
10/10
tofseeevasionexecutionpersistenceprivilege_escalationtrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      87092af98b1cd578e4f5d454634a6da8838a1ce5aa983646c2ca907e7e8a9adc

    • Size

      239KB

    • MD5

      17fe9cfc87e8f07c6c4b081e17856028

    • SHA1

      1268c4b05b12e12c6684f4c2de48556e3631f339

    • SHA256

      87092af98b1cd578e4f5d454634a6da8838a1ce5aa983646c2ca907e7e8a9adc

    • SHA512

      14af42343b34f319756842b1a4c75fb901bb1372b2d4f3f3f554b727799b2f7fa039b3608318b80bfd87781b9643e29cc183f5fe3e47c6c914d4fe7bbe4ccf0f

    • SSDEEP

      6144:Y9HP+2OttoeF95UVV1AW5C1xZyhecCTflc:02Dd5Un1DaxZvcf

    Score
    10/10
    tofseeevasionexecutionpersistenceprivilege_escalationtrojan

    • Tofsee

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

      trojantofsee

    • 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

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • 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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks