tofsee | ec6cb6839b9f41de8bf5c13b3fc33f2dbe6aff2f3aeaf15710e6103178163626

General

Target

709aeebaf05fbde308ee29dfeade658b.exe
Size

11.9MB
MD5

709aeebaf05fbde308ee29dfeade658b
SHA1

cf5f760457ab894dfefc9adbe2dd4d0888f5e1e1
SHA256

ec6cb6839b9f41de8bf5c13b3fc33f2dbe6aff2f3aeaf15710e6103178163626
SHA512

315066aec9d179cc9eb46da5e26dbca82289b9457d9ee0b5c37c93516e12443c94c9da7550a2e104d497544b511c02ed40718b8d7aead9f055b744d6f8c20fe7
SSDEEP

24576:DCKmbpaVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVt:xI

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Creates new service(s) 1 TTPs
persistence

Windows Service
T1543.003

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Windows Service

T1543.003

pid	Process
3420	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\vseukgdt\ImagePath = "C:\\Windows\\SysWOW64\\vseukgdt\\jeiaqbdb.exe"	svchost.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	709aeebaf05fbde308ee29dfeade658b.exe

Executes dropped EXE 1 IoCs

pid	Process
1996	jeiaqbdb.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1996 set thread context of 4368	1996	jeiaqbdb.exe	110

Launches sc.exe 3 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
2296	sc.exe
3276	sc.exe
3416	sc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4884	3044	WerFault.exe	88
3836	1996	WerFault.exe	108

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3044 wrote to memory of 484	3044	709aeebaf05fbde308ee29dfeade658b.exe	91
PID 3044 wrote to memory of 484	3044	709aeebaf05fbde308ee29dfeade658b.exe	91
PID 3044 wrote to memory of 484	3044	709aeebaf05fbde308ee29dfeade658b.exe	91
PID 3044 wrote to memory of 4024	3044	709aeebaf05fbde308ee29dfeade658b.exe	93
PID 3044 wrote to memory of 4024	3044	709aeebaf05fbde308ee29dfeade658b.exe	93
PID 3044 wrote to memory of 4024	3044	709aeebaf05fbde308ee29dfeade658b.exe	93
PID 3044 wrote to memory of 3276	3044	709aeebaf05fbde308ee29dfeade658b.exe	95
PID 3044 wrote to memory of 3276	3044	709aeebaf05fbde308ee29dfeade658b.exe	95
PID 3044 wrote to memory of 3276	3044	709aeebaf05fbde308ee29dfeade658b.exe	95
PID 3044 wrote to memory of 3416	3044	709aeebaf05fbde308ee29dfeade658b.exe	97
PID 3044 wrote to memory of 3416	3044	709aeebaf05fbde308ee29dfeade658b.exe	97
PID 3044 wrote to memory of 3416	3044	709aeebaf05fbde308ee29dfeade658b.exe	97
PID 3044 wrote to memory of 2296	3044	709aeebaf05fbde308ee29dfeade658b.exe	99
PID 3044 wrote to memory of 2296	3044	709aeebaf05fbde308ee29dfeade658b.exe	99
PID 3044 wrote to memory of 2296	3044	709aeebaf05fbde308ee29dfeade658b.exe	99
PID 3044 wrote to memory of 3420	3044	709aeebaf05fbde308ee29dfeade658b.exe	102
PID 3044 wrote to memory of 3420	3044	709aeebaf05fbde308ee29dfeade658b.exe	102
PID 3044 wrote to memory of 3420	3044	709aeebaf05fbde308ee29dfeade658b.exe	102
PID 1996 wrote to memory of 4368	1996	jeiaqbdb.exe	110
PID 1996 wrote to memory of 4368	1996	jeiaqbdb.exe	110
PID 1996 wrote to memory of 4368	1996	jeiaqbdb.exe	110
PID 1996 wrote to memory of 4368	1996	jeiaqbdb.exe	110
PID 1996 wrote to memory of 4368	1996	jeiaqbdb.exe	110

C:\Users\Admin\AppData\Local\Temp\709aeebaf05fbde308ee29dfeade658b.exe
"C:\Users\Admin\AppData\Local\Temp\709aeebaf05fbde308ee29dfeade658b.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3044
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vseukgdt\
  2⤵
  PID:484
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jeiaqbdb.exe" C:\Windows\SysWOW64\vseukgdt\
  2⤵
  PID:4024
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create vseukgdt binPath= "C:\Windows\SysWOW64\vseukgdt\jeiaqbdb.exe /d\"C:\Users\Admin\AppData\Local\Temp\709aeebaf05fbde308ee29dfeade658b.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:3276
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description vseukgdt "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:3416
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start vseukgdt
  2⤵
  - Launches sc.exe
  PID:2296
- C:\Windows\SysWOW64\netsh.exe
  "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
  2⤵
  - Modifies Windows Firewall
  PID:3420
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3044 -s 596
  2⤵
  - Program crash
  PID:4884

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 3044 -ip 3044
1⤵
PID:3752

C:\Windows\SysWOW64\vseukgdt\jeiaqbdb.exe
C:\Windows\SysWOW64\vseukgdt\jeiaqbdb.exe /d"C:\Users\Admin\AppData\Local\Temp\709aeebaf05fbde308ee29dfeade658b.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1996
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  PID:4368
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1996 -s 512
  2⤵
  - Program crash
  PID:3836

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 1996 -ip 1996
1⤵
PID:3564

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

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

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\jeiaqbdb.exe

Filesize
12.7MB

MD5
e42545e417ad30a88632675e90041bd4

SHA1
c71d618322d95d057ff0d4d4e1f0cac8d686d826

SHA256
5be0ce4d12f4894e4d8ba0bddcf1f35d36d1aa6529af2eae08a30b9d5030158b

SHA512
1493ca370eac510a12e8e0ceca2f8b70727566fe4628fd5348fed488a335c28ed0ae63a76455d6fa8f48a3b7600324fe6b779a945363c8aeb73231ccf291d76a

Download Submit
memory/1996-22-0x0000000000400000-0x0000000003629000-memory.dmp

Filesize
50.2MB

Download
memory/1996-16-0x0000000000400000-0x0000000003629000-memory.dmp

Filesize
50.2MB

Download
memory/1996-15-0x0000000003770000-0x0000000003870000-memory.dmp

Filesize
1024KB

Download
memory/3044-8-0x0000000003710000-0x0000000003723000-memory.dmp

Filesize
76KB

Download
memory/3044-7-0x0000000003730000-0x0000000003830000-memory.dmp

Filesize
1024KB

Download
memory/3044-2-0x0000000003710000-0x0000000003723000-memory.dmp

Filesize
76KB

Download
memory/3044-4-0x0000000000400000-0x0000000003629000-memory.dmp

Filesize
50.2MB

Download
memory/3044-12-0x0000000000400000-0x0000000003629000-memory.dmp

Filesize
50.2MB

Download
memory/3044-5-0x0000000000400000-0x0000000003629000-memory.dmp

Filesize
50.2MB

Download
memory/3044-1-0x0000000003730000-0x0000000003830000-memory.dmp

Filesize
1024KB

Download
memory/4368-21-0x0000000000C40000-0x0000000000C55000-memory.dmp

Filesize
84KB

Download
memory/4368-17-0x0000000000C40000-0x0000000000C55000-memory.dmp

Filesize
84KB

Download
memory/4368-26-0x0000000000C40000-0x0000000000C55000-memory.dmp

Filesize
84KB

Download
memory/4368-27-0x0000000000C40000-0x0000000000C55000-memory.dmp

Filesize
84KB

Download
memory/4368-28-0x0000000000C40000-0x0000000000C55000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads