tofsee | d5a45f5fbe4d0679d208908a1282e6675456cf565b427d886cab0b2fdf92c21b

General

Target

3-psltrtbl.exe
Size

14.9MB
MD5

b43621f4b65408c95be2bb609f310f37
SHA1

9bb79973daf63550d3f403c10f6be0a57f797b7f
SHA256

d5a45f5fbe4d0679d208908a1282e6675456cf565b427d886cab0b2fdf92c21b
SHA512

9d09de7115fca7316815c7fcfea2c431bfeccea2629aa3878ea52bd241f1ea8b60bda70828420ced7e0cfd3fbf9bb032a8656d2085afcd748cfbd6ba4e1cb04e

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

defeatwax.ru

refabyd.info

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:

qoywwmvl.exe

pid process

952 qoywwmvl.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

3996 netsh.exe

pid	process
952	qoywwmvl.exe

pid	process
3996	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\jblpobsy\ImagePath = "C:\\Windows\\SysWOW64\\jblpobsy\\qoywwmvl.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:

3-psltrtbl.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1101907861-274115917-2188613224-1000\Control Panel\International\Geo\Nation	3-psltrtbl.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

qoywwmvl.exe

description pid process target process

PID 952 set thread context of 1884 952 qoywwmvl.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

2288 sc.exe
228 sc.exe
3388 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 952 set thread context of 1884	952	qoywwmvl.exe	svchost.exe

pid	process
2288	sc.exe
228	sc.exe
3388	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

3-psltrtbl.exeqoywwmvl.exe

description	pid	process	target process
PID 2432 wrote to memory of 4748	2432	3-psltrtbl.exe	cmd.exe
PID 2432 wrote to memory of 4748	2432	3-psltrtbl.exe	cmd.exe
PID 2432 wrote to memory of 4748	2432	3-psltrtbl.exe	cmd.exe
PID 2432 wrote to memory of 3788	2432	3-psltrtbl.exe	cmd.exe
PID 2432 wrote to memory of 3788	2432	3-psltrtbl.exe	cmd.exe
PID 2432 wrote to memory of 3788	2432	3-psltrtbl.exe	cmd.exe
PID 2432 wrote to memory of 2288	2432	3-psltrtbl.exe	sc.exe
PID 2432 wrote to memory of 2288	2432	3-psltrtbl.exe	sc.exe
PID 2432 wrote to memory of 2288	2432	3-psltrtbl.exe	sc.exe
PID 2432 wrote to memory of 228	2432	3-psltrtbl.exe	sc.exe
PID 2432 wrote to memory of 228	2432	3-psltrtbl.exe	sc.exe
PID 2432 wrote to memory of 228	2432	3-psltrtbl.exe	sc.exe
PID 2432 wrote to memory of 3388	2432	3-psltrtbl.exe	sc.exe
PID 2432 wrote to memory of 3388	2432	3-psltrtbl.exe	sc.exe
PID 2432 wrote to memory of 3388	2432	3-psltrtbl.exe	sc.exe
PID 2432 wrote to memory of 3996	2432	3-psltrtbl.exe	netsh.exe
PID 2432 wrote to memory of 3996	2432	3-psltrtbl.exe	netsh.exe
PID 2432 wrote to memory of 3996	2432	3-psltrtbl.exe	netsh.exe
PID 952 wrote to memory of 1884	952	qoywwmvl.exe	svchost.exe
PID 952 wrote to memory of 1884	952	qoywwmvl.exe	svchost.exe
PID 952 wrote to memory of 1884	952	qoywwmvl.exe	svchost.exe
PID 952 wrote to memory of 1884	952	qoywwmvl.exe	svchost.exe
PID 952 wrote to memory of 1884	952	qoywwmvl.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\3-psltrtbl.exe
"C:\Users\Admin\AppData\Local\Temp\3-psltrtbl.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2432

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jblpobsy\
2⤵
PID:4748

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qoywwmvl.exe" C:\Windows\SysWOW64\jblpobsy\
2⤵
PID:3788

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create jblpobsy binPath= "C:\Windows\SysWOW64\jblpobsy\qoywwmvl.exe /d\"C:\Users\Admin\AppData\Local\Temp\3-psltrtbl.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:2288

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description jblpobsy "wifi internet conection"
2⤵
- Launches sc.exe
PID:228

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start jblpobsy
2⤵
- Launches sc.exe
PID:3388

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:3996

C:\Windows\SysWOW64\jblpobsy\qoywwmvl.exe
C:\Windows\SysWOW64\jblpobsy\qoywwmvl.exe /d"C:\Users\Admin\AppData\Local\Temp\3-psltrtbl.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:952

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
PID:1884

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\qoywwmvl.exe
Filesize
14.5MB

MD5
0468583d458f772031d978b06670f0b9

SHA1
4718e6b55f3f012307bda11107e8471160cf2f18

SHA256
c0546ef8d24a8b3e4b366b437a9bd20b57bbf40649ea1b7cfb8e7538912291be

SHA512
87fcb27ac66e07d180ae1ba6d80f2414b95b5e600cbd3ec0057f422ca8a0994a2fd85b7d66500698fad17136264bc2cf783bab72d98b9ed419c6ccbc2509e9b0

Download Submit
C:\Windows\SysWOW64\jblpobsy\qoywwmvl.exe
Filesize
14.5MB

MD5
0468583d458f772031d978b06670f0b9

SHA1
4718e6b55f3f012307bda11107e8471160cf2f18

SHA256
c0546ef8d24a8b3e4b366b437a9bd20b57bbf40649ea1b7cfb8e7538912291be

SHA512
87fcb27ac66e07d180ae1ba6d80f2414b95b5e600cbd3ec0057f422ca8a0994a2fd85b7d66500698fad17136264bc2cf783bab72d98b9ed419c6ccbc2509e9b0

Download Submit
memory/228-137-0x0000000000000000-mapping.dmp

Download
memory/952-148-0x0000000000400000-0x00000000004AD000-memory.dmp

Filesize
692KB

Download
memory/952-146-0x0000000000668000-0x0000000000676000-memory.dmp

Filesize
56KB

Download
memory/1884-145-0x0000000000EE0000-0x0000000000EF5000-memory.dmp

Filesize
84KB

Download
memory/1884-151-0x0000000000EE0000-0x0000000000EF5000-memory.dmp

Filesize
84KB

Download
memory/1884-150-0x0000000000EE0000-0x0000000000EF5000-memory.dmp

Filesize
84KB

Download
memory/1884-144-0x0000000000000000-mapping.dmp

Download
memory/2288-136-0x0000000000000000-mapping.dmp

Download
memory/2432-142-0x00000000021E0000-0x00000000021F3000-memory.dmp

Filesize
76KB

Download
memory/2432-141-0x000000000071D000-0x000000000072B000-memory.dmp

Filesize
56KB

Download
memory/2432-143-0x0000000000400000-0x00000000004AD000-memory.dmp

Filesize
692KB

Download
memory/2432-133-0x0000000000400000-0x00000000004AD000-memory.dmp

Filesize
692KB

Download
memory/2432-130-0x000000000071D000-0x000000000072B000-memory.dmp

Filesize
56KB

Download
memory/2432-131-0x00000000021E0000-0x00000000021F3000-memory.dmp

Filesize
76KB

Download
memory/3388-138-0x0000000000000000-mapping.dmp

Download
memory/3788-134-0x0000000000000000-mapping.dmp

Download
memory/3996-140-0x0000000000000000-mapping.dmp

Download
memory/4748-132-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads