tofsee | 24e3aeee7c908f97b9f9966987ceddf33b21b64b4c0e0c9297ac8f04e5d3f0de

General

Target

24e3aeee7c908f97b9f9966987ceddf33b21b64b4c0e0c9297ac8f04e5d3f0de.exe
Size

97KB
MD5

21bb978b116fa781407e7e0e7892d421
SHA1

8fb6c24e60e94e3d526913d2854626fb9920c722
SHA256

24e3aeee7c908f97b9f9966987ceddf33b21b64b4c0e0c9297ac8f04e5d3f0de
SHA512

1a042994c4586cc394e48d72fd459bda60367363932ba8a7b580bac956c6a0442302e4a74eedfd57f0264b26121841a27a9b2ab6b96d54d832517ef79307adab

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

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

mdwzgtfe.exe

pid process

4180 mdwzgtfe.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

3092 netsh.exe

pid	process
4180	mdwzgtfe.exe

pid	process
3092	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\frnibhyb\ImagePath = "C:\\Windows\\SysWOW64\\frnibhyb\\mdwzgtfe.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

Processes:

24e3aeee7c908f97b9f9966987ceddf33b21b64b4c0e0c9297ac8f04e5d3f0de.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation	24e3aeee7c908f97b9f9966987ceddf33b21b64b4c0e0c9297ac8f04e5d3f0de.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

mdwzgtfe.exe

description pid process target process

PID 4180 set thread context of 4316 4180 mdwzgtfe.exe svchost.exe
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exe

pid process

4800 sc.exe
3316 sc.exe
4756 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	pid	process	target process
PID 4180 set thread context of 4316	4180	mdwzgtfe.exe	svchost.exe

pid	process
4800	sc.exe
3316	sc.exe
4756	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

24e3aeee7c908f97b9f9966987ceddf33b21b64b4c0e0c9297ac8f04e5d3f0de.exemdwzgtfe.exe

description	pid	process	target process
PID 396 wrote to memory of 3280	396	24e3aeee7c908f97b9f9966987ceddf33b21b64b4c0e0c9297ac8f04e5d3f0de.exe	cmd.exe
PID 396 wrote to memory of 3280	396	24e3aeee7c908f97b9f9966987ceddf33b21b64b4c0e0c9297ac8f04e5d3f0de.exe	cmd.exe
PID 396 wrote to memory of 3280	396	24e3aeee7c908f97b9f9966987ceddf33b21b64b4c0e0c9297ac8f04e5d3f0de.exe	cmd.exe
PID 396 wrote to memory of 1736	396	24e3aeee7c908f97b9f9966987ceddf33b21b64b4c0e0c9297ac8f04e5d3f0de.exe	cmd.exe
PID 396 wrote to memory of 1736	396	24e3aeee7c908f97b9f9966987ceddf33b21b64b4c0e0c9297ac8f04e5d3f0de.exe	cmd.exe
PID 396 wrote to memory of 1736	396	24e3aeee7c908f97b9f9966987ceddf33b21b64b4c0e0c9297ac8f04e5d3f0de.exe	cmd.exe
PID 396 wrote to memory of 4800	396	24e3aeee7c908f97b9f9966987ceddf33b21b64b4c0e0c9297ac8f04e5d3f0de.exe	sc.exe
PID 396 wrote to memory of 4800	396	24e3aeee7c908f97b9f9966987ceddf33b21b64b4c0e0c9297ac8f04e5d3f0de.exe	sc.exe
PID 396 wrote to memory of 4800	396	24e3aeee7c908f97b9f9966987ceddf33b21b64b4c0e0c9297ac8f04e5d3f0de.exe	sc.exe
PID 396 wrote to memory of 3316	396	24e3aeee7c908f97b9f9966987ceddf33b21b64b4c0e0c9297ac8f04e5d3f0de.exe	sc.exe
PID 396 wrote to memory of 3316	396	24e3aeee7c908f97b9f9966987ceddf33b21b64b4c0e0c9297ac8f04e5d3f0de.exe	sc.exe
PID 396 wrote to memory of 3316	396	24e3aeee7c908f97b9f9966987ceddf33b21b64b4c0e0c9297ac8f04e5d3f0de.exe	sc.exe
PID 396 wrote to memory of 4756	396	24e3aeee7c908f97b9f9966987ceddf33b21b64b4c0e0c9297ac8f04e5d3f0de.exe	sc.exe
PID 396 wrote to memory of 4756	396	24e3aeee7c908f97b9f9966987ceddf33b21b64b4c0e0c9297ac8f04e5d3f0de.exe	sc.exe
PID 396 wrote to memory of 4756	396	24e3aeee7c908f97b9f9966987ceddf33b21b64b4c0e0c9297ac8f04e5d3f0de.exe	sc.exe
PID 396 wrote to memory of 3092	396	24e3aeee7c908f97b9f9966987ceddf33b21b64b4c0e0c9297ac8f04e5d3f0de.exe	netsh.exe
PID 396 wrote to memory of 3092	396	24e3aeee7c908f97b9f9966987ceddf33b21b64b4c0e0c9297ac8f04e5d3f0de.exe	netsh.exe
PID 396 wrote to memory of 3092	396	24e3aeee7c908f97b9f9966987ceddf33b21b64b4c0e0c9297ac8f04e5d3f0de.exe	netsh.exe
PID 4180 wrote to memory of 4316	4180	mdwzgtfe.exe	svchost.exe
PID 4180 wrote to memory of 4316	4180	mdwzgtfe.exe	svchost.exe
PID 4180 wrote to memory of 4316	4180	mdwzgtfe.exe	svchost.exe
PID 4180 wrote to memory of 4316	4180	mdwzgtfe.exe	svchost.exe
PID 4180 wrote to memory of 4316	4180	mdwzgtfe.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\24e3aeee7c908f97b9f9966987ceddf33b21b64b4c0e0c9297ac8f04e5d3f0de.exe
"C:\Users\Admin\AppData\Local\Temp\24e3aeee7c908f97b9f9966987ceddf33b21b64b4c0e0c9297ac8f04e5d3f0de.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:396
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\frnibhyb\
  2⤵
  PID:3280
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\mdwzgtfe.exe" C:\Windows\SysWOW64\frnibhyb\
  2⤵
  PID:1736
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create frnibhyb binPath= "C:\Windows\SysWOW64\frnibhyb\mdwzgtfe.exe /d\"C:\Users\Admin\AppData\Local\Temp\24e3aeee7c908f97b9f9966987ceddf33b21b64b4c0e0c9297ac8f04e5d3f0de.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:4800
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description frnibhyb "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:3316
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start frnibhyb
  2⤵
  - Launches sc.exe
  PID:4756
- 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:3092

C:\Windows\SysWOW64\frnibhyb\mdwzgtfe.exe
C:\Windows\SysWOW64\frnibhyb\mdwzgtfe.exe /d"C:\Users\Admin\AppData\Local\Temp\24e3aeee7c908f97b9f9966987ceddf33b21b64b4c0e0c9297ac8f04e5d3f0de.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4180
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  PID:4316

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

New Service

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

New Service

1

T1050

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\mdwzgtfe.exe

Filesize
13.9MB

MD5
35e02322cff657f7b5f50674d8397920

SHA1
617d4366a7210ae9ad5d5a7015f66f82a2bf36ca

SHA256
6a6c7869d286609b976d42d8fec8b42b034011aee14a109a42f897b299da3c1a

SHA512
72906d4a24d4fcf1d668a8af2e7737a907cdb920e6ba1473c511a4db6c69dbd541090b9b5d956d7e4af6e1ac351342813ec49ed4aa9d85a572424a0004d47c70

Download Submit
C:\Windows\SysWOW64\frnibhyb\mdwzgtfe.exe

Filesize
13.9MB

MD5
35e02322cff657f7b5f50674d8397920

SHA1
617d4366a7210ae9ad5d5a7015f66f82a2bf36ca

SHA256
6a6c7869d286609b976d42d8fec8b42b034011aee14a109a42f897b299da3c1a

SHA512
72906d4a24d4fcf1d668a8af2e7737a907cdb920e6ba1473c511a4db6c69dbd541090b9b5d956d7e4af6e1ac351342813ec49ed4aa9d85a572424a0004d47c70

Download Submit
memory/396-131-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/396-130-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/396-140-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/1736-133-0x0000000000000000-mapping.dmp

Download
memory/3092-138-0x0000000000000000-mapping.dmp

Download
memory/3280-132-0x0000000000000000-mapping.dmp

Download
memory/3316-136-0x0000000000000000-mapping.dmp

Download
memory/4180-145-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/4180-141-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/4316-142-0x0000000000000000-mapping.dmp

Download
memory/4316-143-0x0000000000DA0000-0x0000000000DB5000-memory.dmp

Filesize
84KB

Download
memory/4316-146-0x0000000000DA0000-0x0000000000DB5000-memory.dmp

Filesize
84KB

Download
memory/4316-147-0x0000000000DA0000-0x0000000000DB5000-memory.dmp

Filesize
84KB

Download
memory/4316-148-0x0000000000DA0000-0x0000000000DB5000-memory.dmp

Filesize
84KB

Download
memory/4756-137-0x0000000000000000-mapping.dmp

Download
memory/4800-135-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads