Overview

overview

10

Static

static

3

f379c2c732...be.exe

windows7-x64

10

f379c2c732...be.exe

windows10-2004-x64

10

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General

  • Target

    b40c4e8d169abdd14c04db1958ad38c92340e78e436159723c530292d7cf601e

  • Size

    145KB

  • Sample

    240417-qthzjabc4x

  • MD5

    960d4aee524d6007784636205e9aecc5

  • SHA1

    1fd8bd82a5aeb56fcfff06b52f67bddcb5d04334

  • SHA256

    b40c4e8d169abdd14c04db1958ad38c92340e78e436159723c530292d7cf601e

  • SHA512

    5304076985d6e68ba03d4c37f2f7ab81d317e2250681ebd4333f55d8efd4610d41d9221f1a68edd6be801f776ec3a5ca47df5f4a9e49dcb2e901947fa61c2173

  • SSDEEP

    3072:L+iYRICeQv6+1hysMSnDZkiv1JLOs+XFk:L+i0dy+S0Vhv11vak

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

    • 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