tofsee | 55b3ccbe7bfce58fa9fbdbf2d7d492aa8c9def31d73982ac7e8b4ed3092e5f7c

General

Target

55b3ccbe7bfce58fa9fbdbf2d7d492aa8c9def31d73982ac7e8b4ed3092e5f7c.exe
Size

105KB
MD5

e96dc72743408632ec53b7bc90d4dc7f
SHA1

6495db6d82ec97db7e088e04c154125cebde9923
SHA256

55b3ccbe7bfce58fa9fbdbf2d7d492aa8c9def31d73982ac7e8b4ed3092e5f7c
SHA512

4c9a6d745f8fa58a5a507c1389277e3d33b23c44ee51f354a0e8c86d734324ae1703b8a2349de9d7fe19bc484ad3b8e25c59088d07773517807e51c990846140

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:

hdxdjldu.exe

pid process

4388 hdxdjldu.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

2272 netsh.exe

pid	process
4388	hdxdjldu.exe

pid	process
2272	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\auojeamz\ImagePath = "C:\\Windows\\SysWOW64\\auojeamz\\hdxdjldu.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:

55b3ccbe7bfce58fa9fbdbf2d7d492aa8c9def31d73982ac7e8b4ed3092e5f7c.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2660308776-3705150086-26593515-1000\Control Panel\International\Geo\Nation	55b3ccbe7bfce58fa9fbdbf2d7d492aa8c9def31d73982ac7e8b4ed3092e5f7c.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

hdxdjldu.exe

description pid process target process

PID 4388 set thread context of 4672 4388 hdxdjldu.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

2308 sc.exe
1844 sc.exe
808 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 4388 set thread context of 4672	4388	hdxdjldu.exe	svchost.exe

pid	process
2308	sc.exe
1844	sc.exe
808	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

55b3ccbe7bfce58fa9fbdbf2d7d492aa8c9def31d73982ac7e8b4ed3092e5f7c.exehdxdjldu.exe

description	pid	process	target process
PID 1212 wrote to memory of 4508	1212	55b3ccbe7bfce58fa9fbdbf2d7d492aa8c9def31d73982ac7e8b4ed3092e5f7c.exe	cmd.exe
PID 1212 wrote to memory of 4508	1212	55b3ccbe7bfce58fa9fbdbf2d7d492aa8c9def31d73982ac7e8b4ed3092e5f7c.exe	cmd.exe
PID 1212 wrote to memory of 4508	1212	55b3ccbe7bfce58fa9fbdbf2d7d492aa8c9def31d73982ac7e8b4ed3092e5f7c.exe	cmd.exe
PID 1212 wrote to memory of 4340	1212	55b3ccbe7bfce58fa9fbdbf2d7d492aa8c9def31d73982ac7e8b4ed3092e5f7c.exe	cmd.exe
PID 1212 wrote to memory of 4340	1212	55b3ccbe7bfce58fa9fbdbf2d7d492aa8c9def31d73982ac7e8b4ed3092e5f7c.exe	cmd.exe
PID 1212 wrote to memory of 4340	1212	55b3ccbe7bfce58fa9fbdbf2d7d492aa8c9def31d73982ac7e8b4ed3092e5f7c.exe	cmd.exe
PID 1212 wrote to memory of 1844	1212	55b3ccbe7bfce58fa9fbdbf2d7d492aa8c9def31d73982ac7e8b4ed3092e5f7c.exe	sc.exe
PID 1212 wrote to memory of 1844	1212	55b3ccbe7bfce58fa9fbdbf2d7d492aa8c9def31d73982ac7e8b4ed3092e5f7c.exe	sc.exe
PID 1212 wrote to memory of 1844	1212	55b3ccbe7bfce58fa9fbdbf2d7d492aa8c9def31d73982ac7e8b4ed3092e5f7c.exe	sc.exe
PID 1212 wrote to memory of 808	1212	55b3ccbe7bfce58fa9fbdbf2d7d492aa8c9def31d73982ac7e8b4ed3092e5f7c.exe	sc.exe
PID 1212 wrote to memory of 808	1212	55b3ccbe7bfce58fa9fbdbf2d7d492aa8c9def31d73982ac7e8b4ed3092e5f7c.exe	sc.exe
PID 1212 wrote to memory of 808	1212	55b3ccbe7bfce58fa9fbdbf2d7d492aa8c9def31d73982ac7e8b4ed3092e5f7c.exe	sc.exe
PID 1212 wrote to memory of 2308	1212	55b3ccbe7bfce58fa9fbdbf2d7d492aa8c9def31d73982ac7e8b4ed3092e5f7c.exe	sc.exe
PID 1212 wrote to memory of 2308	1212	55b3ccbe7bfce58fa9fbdbf2d7d492aa8c9def31d73982ac7e8b4ed3092e5f7c.exe	sc.exe
PID 1212 wrote to memory of 2308	1212	55b3ccbe7bfce58fa9fbdbf2d7d492aa8c9def31d73982ac7e8b4ed3092e5f7c.exe	sc.exe
PID 1212 wrote to memory of 2272	1212	55b3ccbe7bfce58fa9fbdbf2d7d492aa8c9def31d73982ac7e8b4ed3092e5f7c.exe	netsh.exe
PID 1212 wrote to memory of 2272	1212	55b3ccbe7bfce58fa9fbdbf2d7d492aa8c9def31d73982ac7e8b4ed3092e5f7c.exe	netsh.exe
PID 1212 wrote to memory of 2272	1212	55b3ccbe7bfce58fa9fbdbf2d7d492aa8c9def31d73982ac7e8b4ed3092e5f7c.exe	netsh.exe
PID 4388 wrote to memory of 4672	4388	hdxdjldu.exe	svchost.exe
PID 4388 wrote to memory of 4672	4388	hdxdjldu.exe	svchost.exe
PID 4388 wrote to memory of 4672	4388	hdxdjldu.exe	svchost.exe
PID 4388 wrote to memory of 4672	4388	hdxdjldu.exe	svchost.exe
PID 4388 wrote to memory of 4672	4388	hdxdjldu.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\55b3ccbe7bfce58fa9fbdbf2d7d492aa8c9def31d73982ac7e8b4ed3092e5f7c.exe
"C:\Users\Admin\AppData\Local\Temp\55b3ccbe7bfce58fa9fbdbf2d7d492aa8c9def31d73982ac7e8b4ed3092e5f7c.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1212

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\auojeamz\
2⤵
PID:4508

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\hdxdjldu.exe" C:\Windows\SysWOW64\auojeamz\
2⤵
PID:4340

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create auojeamz binPath= "C:\Windows\SysWOW64\auojeamz\hdxdjldu.exe /d\"C:\Users\Admin\AppData\Local\Temp\55b3ccbe7bfce58fa9fbdbf2d7d492aa8c9def31d73982ac7e8b4ed3092e5f7c.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1844

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description auojeamz "wifi internet conection"
2⤵
- Launches sc.exe
PID:808

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start auojeamz
2⤵
- Launches sc.exe
PID:2308

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:2272

C:\Windows\SysWOW64\auojeamz\hdxdjldu.exe
C:\Windows\SysWOW64\auojeamz\hdxdjldu.exe /d"C:\Users\Admin\AppData\Local\Temp\55b3ccbe7bfce58fa9fbdbf2d7d492aa8c9def31d73982ac7e8b4ed3092e5f7c.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4388

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
PID:4672

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

New Service

1

T1050

Modify Existing Service

1

T1031

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

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\hdxdjldu.exe
Filesize
13.9MB

MD5
4a5695ee203d601b16b0e07cb2cdc0ab

SHA1
df402b8abe568d9fb4fff413aa8cadf7404a0569

SHA256
88f7d89e5452108357c679659a9f0e6b3c3ba48a4841d530b96647d17e1a1d12

SHA512
dba28b104bc92848f3060cb5b061fc6e3ecbd322777a7dbf7feffc6935677ac8e79cda6598cb3a6e664bcc9d99eb2c02f1538918a229afbf16eb43f9d2265a5a

Download Submit
C:\Windows\SysWOW64\auojeamz\hdxdjldu.exe
Filesize
13.9MB

MD5
4a5695ee203d601b16b0e07cb2cdc0ab

SHA1
df402b8abe568d9fb4fff413aa8cadf7404a0569

SHA256
88f7d89e5452108357c679659a9f0e6b3c3ba48a4841d530b96647d17e1a1d12

SHA512
dba28b104bc92848f3060cb5b061fc6e3ecbd322777a7dbf7feffc6935677ac8e79cda6598cb3a6e664bcc9d99eb2c02f1538918a229afbf16eb43f9d2265a5a

Download Submit
memory/808-136-0x0000000000000000-mapping.dmp

Download
memory/1212-131-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/1212-130-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/1844-135-0x0000000000000000-mapping.dmp

Download
memory/2272-138-0x0000000000000000-mapping.dmp

Download
memory/2308-137-0x0000000000000000-mapping.dmp

Download
memory/4340-133-0x0000000000000000-mapping.dmp

Download
memory/4388-140-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/4388-141-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/4508-132-0x0000000000000000-mapping.dmp

Download
memory/4672-142-0x0000000000000000-mapping.dmp

Download
memory/4672-143-0x0000000000510000-0x0000000000525000-memory.dmp

Filesize
84KB

Download
memory/4672-146-0x0000000000510000-0x0000000000525000-memory.dmp

Filesize
84KB

Download
memory/4672-147-0x0000000000510000-0x0000000000525000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads