tofsee | 662a375950d1b16ceb51ea7d50fbaa9121f087d7d148d3be65705a2c4b8b3d08

Analysis

max time kernel
148s
max time network
150s
platform
windows10-1703_x64
resource
win10-20220812-en
resource tags

arch:x64arch:x86image:win10-20220812-enlocale:en-usos:windows10-1703-x64system
submitted
26-11-2022 09:06

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General

Target

662a375950d1b16ceb51ea7d50fbaa9121f087d7d148d3be65705a2c4b8b3d08.exe
Size

146KB
MD5

1fd5ff320a44cfc6d33a505c24efa590
SHA1

6db5b5667f7861e163344f95ec9f0f3616d14130
SHA256

662a375950d1b16ceb51ea7d50fbaa9121f087d7d148d3be65705a2c4b8b3d08
SHA512

83177f1f72249deaca68249ee5b2f4b755dd0481fb7b24c55f3f28183d5b54edf40f4e330bb00156210eea1f6d73414474df4f3b5b8b69cb14150d058983c29d
SSDEEP

3072:/EBurucqyxil650IRnGOamWe3BYL7aoBUSl3X:cVcqd6Bg7aj+n

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

svartalfheim.top

jotunheim.name

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee

Windows security bypass 2 TTPs 1 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\cxwgcnxa = "0"	svchost.exe

Creates new service(s) 1 TTPs
persistence

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

jzbofxi.exe

pid process

1772 jzbofxi.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

4548 netsh.exe

pid	process
1772	jzbofxi.exe

pid	process
4548	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\cxwgcnxa\ImagePath = "C:\\Windows\\SysWOW64\\cxwgcnxa\\jzbofxi.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

4804 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

jzbofxi.exe

description pid process target process

PID 1772 set thread context of 4804 1772 jzbofxi.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

3656 sc.exe
4044 sc.exe
4228 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

pid	process
4804	svchost.exe

description	pid	process	target process
PID 1772 set thread context of 4804	1772	jzbofxi.exe	svchost.exe

pid	process
3656	sc.exe
4044	sc.exe
4228	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

662a375950d1b16ceb51ea7d50fbaa9121f087d7d148d3be65705a2c4b8b3d08.exejzbofxi.exe

description	pid	process	target process
PID 1000 wrote to memory of 3780	1000	662a375950d1b16ceb51ea7d50fbaa9121f087d7d148d3be65705a2c4b8b3d08.exe	cmd.exe
PID 1000 wrote to memory of 3780	1000	662a375950d1b16ceb51ea7d50fbaa9121f087d7d148d3be65705a2c4b8b3d08.exe	cmd.exe
PID 1000 wrote to memory of 3780	1000	662a375950d1b16ceb51ea7d50fbaa9121f087d7d148d3be65705a2c4b8b3d08.exe	cmd.exe
PID 1000 wrote to memory of 2008	1000	662a375950d1b16ceb51ea7d50fbaa9121f087d7d148d3be65705a2c4b8b3d08.exe	cmd.exe
PID 1000 wrote to memory of 2008	1000	662a375950d1b16ceb51ea7d50fbaa9121f087d7d148d3be65705a2c4b8b3d08.exe	cmd.exe
PID 1000 wrote to memory of 2008	1000	662a375950d1b16ceb51ea7d50fbaa9121f087d7d148d3be65705a2c4b8b3d08.exe	cmd.exe
PID 1000 wrote to memory of 3656	1000	662a375950d1b16ceb51ea7d50fbaa9121f087d7d148d3be65705a2c4b8b3d08.exe	sc.exe
PID 1000 wrote to memory of 3656	1000	662a375950d1b16ceb51ea7d50fbaa9121f087d7d148d3be65705a2c4b8b3d08.exe	sc.exe
PID 1000 wrote to memory of 3656	1000	662a375950d1b16ceb51ea7d50fbaa9121f087d7d148d3be65705a2c4b8b3d08.exe	sc.exe
PID 1000 wrote to memory of 4044	1000	662a375950d1b16ceb51ea7d50fbaa9121f087d7d148d3be65705a2c4b8b3d08.exe	sc.exe
PID 1000 wrote to memory of 4044	1000	662a375950d1b16ceb51ea7d50fbaa9121f087d7d148d3be65705a2c4b8b3d08.exe	sc.exe
PID 1000 wrote to memory of 4044	1000	662a375950d1b16ceb51ea7d50fbaa9121f087d7d148d3be65705a2c4b8b3d08.exe	sc.exe
PID 1000 wrote to memory of 4228	1000	662a375950d1b16ceb51ea7d50fbaa9121f087d7d148d3be65705a2c4b8b3d08.exe	sc.exe
PID 1000 wrote to memory of 4228	1000	662a375950d1b16ceb51ea7d50fbaa9121f087d7d148d3be65705a2c4b8b3d08.exe	sc.exe
PID 1000 wrote to memory of 4228	1000	662a375950d1b16ceb51ea7d50fbaa9121f087d7d148d3be65705a2c4b8b3d08.exe	sc.exe
PID 1000 wrote to memory of 4548	1000	662a375950d1b16ceb51ea7d50fbaa9121f087d7d148d3be65705a2c4b8b3d08.exe	netsh.exe
PID 1000 wrote to memory of 4548	1000	662a375950d1b16ceb51ea7d50fbaa9121f087d7d148d3be65705a2c4b8b3d08.exe	netsh.exe
PID 1000 wrote to memory of 4548	1000	662a375950d1b16ceb51ea7d50fbaa9121f087d7d148d3be65705a2c4b8b3d08.exe	netsh.exe
PID 1772 wrote to memory of 4804	1772	jzbofxi.exe	svchost.exe
PID 1772 wrote to memory of 4804	1772	jzbofxi.exe	svchost.exe
PID 1772 wrote to memory of 4804	1772	jzbofxi.exe	svchost.exe
PID 1772 wrote to memory of 4804	1772	jzbofxi.exe	svchost.exe
PID 1772 wrote to memory of 4804	1772	jzbofxi.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\662a375950d1b16ceb51ea7d50fbaa9121f087d7d148d3be65705a2c4b8b3d08.exe
"C:\Users\Admin\AppData\Local\Temp\662a375950d1b16ceb51ea7d50fbaa9121f087d7d148d3be65705a2c4b8b3d08.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1000

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\cxwgcnxa\
2⤵
PID:3780

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jzbofxi.exe" C:\Windows\SysWOW64\cxwgcnxa\
2⤵
PID:2008

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create cxwgcnxa binPath= "C:\Windows\SysWOW64\cxwgcnxa\jzbofxi.exe /d\"C:\Users\Admin\AppData\Local\Temp\662a375950d1b16ceb51ea7d50fbaa9121f087d7d148d3be65705a2c4b8b3d08.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:3656

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description cxwgcnxa "wifi internet conection"
2⤵
- Launches sc.exe
PID:4044

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start cxwgcnxa
2⤵
- Launches sc.exe
PID:4228

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:4548

C:\Windows\SysWOW64\cxwgcnxa\jzbofxi.exe
C:\Windows\SysWOW64\cxwgcnxa\jzbofxi.exe /d"C:\Users\Admin\AppData\Local\Temp\662a375950d1b16ceb51ea7d50fbaa9121f087d7d148d3be65705a2c4b8b3d08.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1772

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Windows security bypass
- Sets service image path in registry
- Deletes itself
PID:4804

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

T1031

New Service

T1050

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

New Service

T1050

Defense Evasion

Disabling Security Tools

T1089

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\jzbofxi.exe
Filesize
11.1MB

MD5
f61982b30a755155a8f36450ad8acbf7

SHA1
33bd48cb076af9f17780fa9ffb54389126e5ff4d

SHA256
473132c661a90f39aba24d9741a4c015cdafda23caf746e82af12a12a243f6cc

SHA512
e32adbf75874d9c80c522eb1d5f7cd0b4681ad658f35b6b461d260363010f2c05deb3bd96d92a0cccdf7c1d36bc95ebaa84926d1bacfd29d6f222e385fe3a898

Download Submit
C:\Windows\SysWOW64\cxwgcnxa\jzbofxi.exe
Filesize
11.1MB

MD5
f61982b30a755155a8f36450ad8acbf7

SHA1
33bd48cb076af9f17780fa9ffb54389126e5ff4d

SHA256
473132c661a90f39aba24d9741a4c015cdafda23caf746e82af12a12a243f6cc

SHA512
e32adbf75874d9c80c522eb1d5f7cd0b4681ad658f35b6b461d260363010f2c05deb3bd96d92a0cccdf7c1d36bc95ebaa84926d1bacfd29d6f222e385fe3a898

Download Submit
memory/1000-161-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-155-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-124-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-125-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-126-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-127-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-128-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-129-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-130-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-131-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-132-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-133-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-134-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-135-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-136-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-165-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-138-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-139-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-140-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-141-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-143-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-144-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-145-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-146-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-147-0x0000000000AE0000-0x0000000000B8E000-memory.dmp

Filesize
696KB

Download
memory/1000-148-0x0000000002810000-0x0000000002823000-memory.dmp

Filesize
76KB

Download
memory/1000-149-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-150-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-151-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-152-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-153-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-154-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-164-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-156-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-157-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-158-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-159-0x0000000000400000-0x0000000000AD6000-memory.dmp

Filesize
6.8MB

Download
memory/1000-160-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-163-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-162-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-120-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-123-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-137-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-166-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-167-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-168-0x0000000000AE0000-0x0000000000B8E000-memory.dmp

Filesize
696KB

Download
memory/1000-169-0x0000000002810000-0x0000000002823000-memory.dmp

Filesize
76KB

Download
memory/1000-170-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-171-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-172-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-121-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1000-225-0x0000000000400000-0x0000000000AD6000-memory.dmp

Filesize
6.8MB

Download
memory/1000-122-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/1772-308-0x0000000000AE0000-0x0000000000B8E000-memory.dmp

Filesize
696KB

Download
memory/1772-310-0x0000000000400000-0x0000000000AD6000-memory.dmp

Filesize
6.8MB

Download
memory/2008-180-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/2008-179-0x0000000000000000-mapping.dmp

Download
memory/2008-184-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/2008-181-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/2008-182-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/2008-183-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/3656-188-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/3656-194-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/3656-192-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/3656-189-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/3656-190-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/3656-186-0x0000000000000000-mapping.dmp

Download
memory/3656-187-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/3780-175-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/3780-176-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/3780-178-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/3780-173-0x0000000000000000-mapping.dmp

Download
memory/3780-177-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/3780-174-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/4044-193-0x0000000077DE0000-0x0000000077F6E000-memory.dmp

Filesize
1.6MB

Download
memory/4044-191-0x0000000000000000-mapping.dmp

Download
memory/4228-208-0x0000000000000000-mapping.dmp

Download
memory/4548-219-0x0000000000000000-mapping.dmp

Download
memory/4804-489-0x0000000002D20000-0x0000000002D35000-memory.dmp

Filesize
84KB

Download
memory/4804-304-0x0000000002D29A6B-mapping.dmp

Download
memory/4804-372-0x0000000002D20000-0x0000000002D35000-memory.dmp

Filesize
84KB

Download