Overview

overview

10

Static

static

3

f379c2c732...be.exe

windows7-x64

10

f379c2c732...be.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    01f20033d6ae2256b7c684c5afd4cf931a38db65e9346688de4d7894e34fdc5c

  • Size

    145KB

  • Sample

    240417-rj5k8abd43

  • MD5

    fec3eeba09cbb86a90cb2f6fa1a92ea5

  • SHA1

    d4ec8537a218b524524edb171b376eaab01ded15

  • SHA256

    01f20033d6ae2256b7c684c5afd4cf931a38db65e9346688de4d7894e34fdc5c

  • SHA512

    bf308ee63ff96ef66c16bd99dcb02b4982afce9ab9d84a9be7e2bcc368bd31f57083e1c680d1919e6d998d1b8dc38588b823fd4387a48e1595861201f7f51a65

  • SSDEEP

    3072:3vfF8ICt5q1B4ChJTX7Ussl2uxLCpSCsDBrKzyi02LyFv:3F1wwFssQPsWriZo

Score
10/10
tofseeevasionpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      f379c2c732470dbce8e17423baf7f6fcca63bcb13c4ade33a15df1225e3841be.exe

    • Size

      232KB

    • MD5

      b5f3dc95c09fa3bfdf009a404736f94e

    • SHA1

      03e471e7edf9bbcbe2483ebd1ba05364c93a190a

    • SHA256

      f379c2c732470dbce8e17423baf7f6fcca63bcb13c4ade33a15df1225e3841be

    • SHA512

      f63cba660384d5296e2f8aeeceba1a2d4707311a242cd5f12220008670cb5c2bf686b546fafe03cc6c5363bd62fe4c067a1f9dc73a8388488e13854b631ee546

    • SSDEEP

      6144:j6zxC0r84BWnfZUH7SFcQU+9HFsvKMXOCU:kY0r9BeZUbSiy9HSvKwO

    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

    • 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 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