tofsee | af4515bb1ca19b5fdc2cf47391594cb4ca3f2c3063a1c703e4331e741d31e4fc

Analysis

max time kernel
148s
max time network
152s
platform
windows10-1703_x64
resource
win10-20220812-en
resource tags

arch:x64arch:x86image:win10-20220812-enlocale:en-usos:windows10-1703-x64system
submitted
25-11-2022 22:37

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General

Target

af4515bb1ca19b5fdc2cf47391594cb4ca3f2c3063a1c703e4331e741d31e4fc.exe
Size

167KB
MD5

65e43f6b5f4bbf71f6ecab7473d5f169
SHA1

647be05e012efc56178c827e429208f773e7358c
SHA256

af4515bb1ca19b5fdc2cf47391594cb4ca3f2c3063a1c703e4331e741d31e4fc
SHA512

9da8f0b9be029a65d2971ccb936a0c0a08a33275f3260ac232f497744ba8bb088dd377a0aaf2c083cdc3d2bb0d1f39d9af19ac79f245276ce64c43fe1adb07c9
SSDEEP

3072:RPJ1pyY1u2XpS5VL7++e3BuFF9uOnWR0vkqNuG2:N0iZXh+eKFlWmk+u

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\qwfjyalk = "0"	svchost.exe

Creates new service(s) 1 TTPs
persistence

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

nmlmnxzc.exe

pid process

4472 nmlmnxzc.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

3036 netsh.exe

pid	process
4472	nmlmnxzc.exe

pid	process
3036	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\qwfjyalk\ImagePath = "C:\\Windows\\SysWOW64\\qwfjyalk\\nmlmnxzc.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

5052 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

nmlmnxzc.exe

description pid process target process

PID 4472 set thread context of 5052 4472 nmlmnxzc.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

3560 sc.exe
2224 sc.exe
4904 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
5052	svchost.exe

description	pid	process	target process
PID 4472 set thread context of 5052	4472	nmlmnxzc.exe	svchost.exe

pid	process
3560	sc.exe
2224	sc.exe
4904	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

af4515bb1ca19b5fdc2cf47391594cb4ca3f2c3063a1c703e4331e741d31e4fc.exenmlmnxzc.exe

description	pid	process	target process
PID 2016 wrote to memory of 4804	2016	af4515bb1ca19b5fdc2cf47391594cb4ca3f2c3063a1c703e4331e741d31e4fc.exe	cmd.exe
PID 2016 wrote to memory of 4804	2016	af4515bb1ca19b5fdc2cf47391594cb4ca3f2c3063a1c703e4331e741d31e4fc.exe	cmd.exe
PID 2016 wrote to memory of 4804	2016	af4515bb1ca19b5fdc2cf47391594cb4ca3f2c3063a1c703e4331e741d31e4fc.exe	cmd.exe
PID 2016 wrote to memory of 392	2016	af4515bb1ca19b5fdc2cf47391594cb4ca3f2c3063a1c703e4331e741d31e4fc.exe	cmd.exe
PID 2016 wrote to memory of 392	2016	af4515bb1ca19b5fdc2cf47391594cb4ca3f2c3063a1c703e4331e741d31e4fc.exe	cmd.exe
PID 2016 wrote to memory of 392	2016	af4515bb1ca19b5fdc2cf47391594cb4ca3f2c3063a1c703e4331e741d31e4fc.exe	cmd.exe
PID 2016 wrote to memory of 3560	2016	af4515bb1ca19b5fdc2cf47391594cb4ca3f2c3063a1c703e4331e741d31e4fc.exe	sc.exe
PID 2016 wrote to memory of 3560	2016	af4515bb1ca19b5fdc2cf47391594cb4ca3f2c3063a1c703e4331e741d31e4fc.exe	sc.exe
PID 2016 wrote to memory of 3560	2016	af4515bb1ca19b5fdc2cf47391594cb4ca3f2c3063a1c703e4331e741d31e4fc.exe	sc.exe
PID 2016 wrote to memory of 2224	2016	af4515bb1ca19b5fdc2cf47391594cb4ca3f2c3063a1c703e4331e741d31e4fc.exe	sc.exe
PID 2016 wrote to memory of 2224	2016	af4515bb1ca19b5fdc2cf47391594cb4ca3f2c3063a1c703e4331e741d31e4fc.exe	sc.exe
PID 2016 wrote to memory of 2224	2016	af4515bb1ca19b5fdc2cf47391594cb4ca3f2c3063a1c703e4331e741d31e4fc.exe	sc.exe
PID 2016 wrote to memory of 4904	2016	af4515bb1ca19b5fdc2cf47391594cb4ca3f2c3063a1c703e4331e741d31e4fc.exe	sc.exe
PID 2016 wrote to memory of 4904	2016	af4515bb1ca19b5fdc2cf47391594cb4ca3f2c3063a1c703e4331e741d31e4fc.exe	sc.exe
PID 2016 wrote to memory of 4904	2016	af4515bb1ca19b5fdc2cf47391594cb4ca3f2c3063a1c703e4331e741d31e4fc.exe	sc.exe
PID 2016 wrote to memory of 3036	2016	af4515bb1ca19b5fdc2cf47391594cb4ca3f2c3063a1c703e4331e741d31e4fc.exe	netsh.exe
PID 2016 wrote to memory of 3036	2016	af4515bb1ca19b5fdc2cf47391594cb4ca3f2c3063a1c703e4331e741d31e4fc.exe	netsh.exe
PID 2016 wrote to memory of 3036	2016	af4515bb1ca19b5fdc2cf47391594cb4ca3f2c3063a1c703e4331e741d31e4fc.exe	netsh.exe
PID 4472 wrote to memory of 5052	4472	nmlmnxzc.exe	svchost.exe
PID 4472 wrote to memory of 5052	4472	nmlmnxzc.exe	svchost.exe
PID 4472 wrote to memory of 5052	4472	nmlmnxzc.exe	svchost.exe
PID 4472 wrote to memory of 5052	4472	nmlmnxzc.exe	svchost.exe
PID 4472 wrote to memory of 5052	4472	nmlmnxzc.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\af4515bb1ca19b5fdc2cf47391594cb4ca3f2c3063a1c703e4331e741d31e4fc.exe
"C:\Users\Admin\AppData\Local\Temp\af4515bb1ca19b5fdc2cf47391594cb4ca3f2c3063a1c703e4331e741d31e4fc.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2016

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qwfjyalk\
2⤵
PID:4804

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nmlmnxzc.exe" C:\Windows\SysWOW64\qwfjyalk\
2⤵
PID:392

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create qwfjyalk binPath= "C:\Windows\SysWOW64\qwfjyalk\nmlmnxzc.exe /d\"C:\Users\Admin\AppData\Local\Temp\af4515bb1ca19b5fdc2cf47391594cb4ca3f2c3063a1c703e4331e741d31e4fc.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:3560

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description qwfjyalk "wifi internet conection"
2⤵
- Launches sc.exe
PID:2224

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start qwfjyalk
2⤵
- Launches sc.exe
PID:4904

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:3036

C:\Windows\SysWOW64\qwfjyalk\nmlmnxzc.exe
C:\Windows\SysWOW64\qwfjyalk\nmlmnxzc.exe /d"C:\Users\Admin\AppData\Local\Temp\af4515bb1ca19b5fdc2cf47391594cb4ca3f2c3063a1c703e4331e741d31e4fc.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4472

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Windows security bypass
- Sets service image path in registry
- Deletes itself
PID:5052

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

New Service

T1050

Modify Existing Service

T1031

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

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nmlmnxzc.exe
Filesize
13.0MB

MD5
d7f6e4319ae8c702e6206c8cb2e5fd6a

SHA1
1e20d86db9874e3bca239d70bab706e3de16cf30

SHA256
afceb4e56cb7f57b041bddd0a15468d1874cd1e257b172a853350a36e6f0dfc7

SHA512
4702b624123dfd93e8daaa5c888faa7bc3af59abe7368bf0d550aae24392d32973bd1de5ad02f7ab12bab4aabd310c40cdd284ac47942dccd14a41fb3dbe1be5

Download Submit
C:\Windows\SysWOW64\qwfjyalk\nmlmnxzc.exe
Filesize
13.0MB

MD5
d7f6e4319ae8c702e6206c8cb2e5fd6a

SHA1
1e20d86db9874e3bca239d70bab706e3de16cf30

SHA256
afceb4e56cb7f57b041bddd0a15468d1874cd1e257b172a853350a36e6f0dfc7

SHA512
4702b624123dfd93e8daaa5c888faa7bc3af59abe7368bf0d550aae24392d32973bd1de5ad02f7ab12bab4aabd310c40cdd284ac47942dccd14a41fb3dbe1be5

Download Submit
memory/392-178-0x0000000000000000-mapping.dmp

Download
memory/392-179-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/392-180-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/392-181-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/392-182-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/392-183-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-158-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-151-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-125-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-126-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-127-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-128-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-129-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-130-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-131-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-133-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-132-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-134-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-135-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-136-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-137-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-138-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-139-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-140-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-141-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-143-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-144-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-145-0x0000000000840000-0x000000000098A000-memory.dmp

Filesize
1.3MB

Download
memory/2016-146-0x0000000002440000-0x0000000002453000-memory.dmp

Filesize
76KB

Download
memory/2016-147-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-148-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-149-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-150-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-124-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-152-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-153-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-154-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-155-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-156-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-157-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-123-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-159-0x0000000000400000-0x000000000070B000-memory.dmp

Filesize
3.0MB

Download
memory/2016-161-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-120-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-224-0x0000000000400000-0x000000000070B000-memory.dmp

Filesize
3.0MB

Download
memory/2016-163-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-164-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-165-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-166-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-167-0x0000000002440000-0x0000000002453000-memory.dmp

Filesize
76KB

Download
memory/2016-168-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-169-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-170-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-171-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-160-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-122-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-121-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2016-162-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/2224-194-0x0000000000000000-mapping.dmp

Download
memory/3036-218-0x0000000000000000-mapping.dmp

Download
memory/3560-185-0x0000000000000000-mapping.dmp

Download
memory/3560-187-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/3560-190-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/3560-191-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/3560-192-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/3560-186-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/3560-189-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/3560-188-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/4472-327-0x0000000000400000-0x000000000070B000-memory.dmp

Filesize
3.0MB

Download
memory/4472-318-0x0000000000400000-0x000000000070B000-memory.dmp

Filesize
3.0MB

Download
memory/4472-317-0x0000000000903000-0x0000000000914000-memory.dmp

Filesize
68KB

Download
memory/4472-325-0x0000000000903000-0x0000000000914000-memory.dmp

Filesize
68KB

Download
memory/4804-173-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/4804-177-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/4804-176-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/4804-175-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/4804-172-0x0000000000000000-mapping.dmp

Download
memory/4804-174-0x0000000076FB0000-0x000000007713E000-memory.dmp

Filesize
1.6MB

Download
memory/4904-207-0x0000000000000000-mapping.dmp

Download
memory/5052-321-0x0000000000609A6B-mapping.dmp

Download
memory/5052-362-0x0000000000600000-0x0000000000615000-memory.dmp

Filesize
84KB

Download
memory/5052-489-0x0000000000600000-0x0000000000615000-memory.dmp

Filesize
84KB

Download