tofsee | 6ffd0a23f224b192b9528c6b13bf203638c74e45b6da2f269d82776a6ca83fc5

General

Target

e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe
Size

303KB
MD5

531df55984e2b66ad9f0dbd639de601e
SHA1

dc9d0df60d45c19e668e99a39946d1d39a5d9a09
SHA256

e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f
SHA512

1a2029171755e8c7f4f374af5544eef317a0d1635272991b7535f4406a99b4ef5d70985602fd85c8b9eb40de2215c81be496157821f78a013cea74ad2848e72b
SSDEEP

3072:MuFL7HO/Wc2L/rIUpqfM/FqdAt/XOM5TJDTnmhd+:xFL7HQ2LrI7fg2AtXJnmv+

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

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
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

3856 netsh.exe

pid	process
3856	netsh.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:

e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\Control Panel\International\Geo\Nation	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe

Executes dropped EXE 1 IoCs

Processes:

qcotqwvj.exe

pid process

1596 qcotqwvj.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

4328 sc.exe
4292 sc.exe
3080 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

4448 2268 WerFault.exe e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe

pid	process
1596	qcotqwvj.exe

pid	process
4328	sc.exe
4292	sc.exe
3080	sc.exe

pid	pid_target	process	target process
4448	2268	WerFault.exe	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe

description	pid	process	target process
PID 2268 wrote to memory of 3960	2268	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	cmd.exe
PID 2268 wrote to memory of 3960	2268	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	cmd.exe
PID 2268 wrote to memory of 3960	2268	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	cmd.exe
PID 2268 wrote to memory of 2108	2268	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	cmd.exe
PID 2268 wrote to memory of 2108	2268	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	cmd.exe
PID 2268 wrote to memory of 2108	2268	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	cmd.exe
PID 2268 wrote to memory of 4328	2268	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	sc.exe
PID 2268 wrote to memory of 4328	2268	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	sc.exe
PID 2268 wrote to memory of 4328	2268	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	sc.exe
PID 2268 wrote to memory of 4292	2268	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	sc.exe
PID 2268 wrote to memory of 4292	2268	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	sc.exe
PID 2268 wrote to memory of 4292	2268	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	sc.exe
PID 2268 wrote to memory of 3080	2268	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	sc.exe
PID 2268 wrote to memory of 3080	2268	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	sc.exe
PID 2268 wrote to memory of 3080	2268	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	sc.exe
PID 2268 wrote to memory of 3856	2268	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	netsh.exe
PID 2268 wrote to memory of 3856	2268	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	netsh.exe
PID 2268 wrote to memory of 3856	2268	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe
"C:\Users\Admin\AppData\Local\Temp\e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2268

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zpslkdnu\
2⤵
PID:3960

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qcotqwvj.exe" C:\Windows\SysWOW64\zpslkdnu\
2⤵
PID:2108

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create zpslkdnu binPath= "C:\Windows\SysWOW64\zpslkdnu\qcotqwvj.exe /d\"C:\Users\Admin\AppData\Local\Temp\e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:4328

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description zpslkdnu "wifi internet conection"
2⤵
- Launches sc.exe
PID:4292

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start zpslkdnu
2⤵
- Launches sc.exe
PID:3080

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:3856

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2268 -s 672
2⤵
- Program crash
PID:4448

C:\Windows\SysWOW64\zpslkdnu\qcotqwvj.exe
C:\Windows\SysWOW64\zpslkdnu\qcotqwvj.exe /d"C:\Users\Admin\AppData\Local\Temp\e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe"
1⤵
- Executes dropped EXE
PID:1596

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 2268 -ip 2268
1⤵
PID:1112

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

New Service

1

T1050

Modify Existing Service

1

T1031

Privilege Escalation

New Service

1

T1050

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\qcotqwvj.exe
Filesize
13.3MB

MD5
3abe8d32d07cd4a9bb95ea61a7280dec

SHA1
02e703eb008b91eca418e905526885c5ae494e09

SHA256
a07deac34701ad47a3ee0847a83b5f4c760907dd0239b9868c83c9152d457d0a

SHA512
8c74499c8a62d1d45a7ccb3244d6faf196eaac5f1e48e8054f7cc251c375c2a0c17d70dac7f8163bc00a9994b0ff2f2eb9e97eab218be5dc4128b65d7eaf28c0

Download Submit
C:\Windows\SysWOW64\zpslkdnu\qcotqwvj.exe
Filesize
13.3MB

MD5
3abe8d32d07cd4a9bb95ea61a7280dec

SHA1
02e703eb008b91eca418e905526885c5ae494e09

SHA256
a07deac34701ad47a3ee0847a83b5f4c760907dd0239b9868c83c9152d457d0a

SHA512
8c74499c8a62d1d45a7ccb3244d6faf196eaac5f1e48e8054f7cc251c375c2a0c17d70dac7f8163bc00a9994b0ff2f2eb9e97eab218be5dc4128b65d7eaf28c0

Download Submit
memory/1596-146-0x0000000000D80000-0x0000000000D93000-memory.dmp

Filesize
76KB

Download
memory/1596-147-0x0000000000400000-0x0000000000A5C000-memory.dmp

Filesize
6.4MB

Download
memory/2268-134-0x0000000002790000-0x00000000027A3000-memory.dmp

Filesize
76KB

Download
memory/2268-135-0x0000000000400000-0x0000000000A5C000-memory.dmp

Filesize
6.4MB

Download
memory/2268-136-0x0000000000400000-0x0000000000A5C000-memory.dmp

Filesize
6.4MB

Download
memory/2268-139-0x0000000000400000-0x0000000000A5C000-memory.dmp

Filesize
6.4MB

Download
memory/2268-150-0x0000000000400000-0x0000000000A5C000-memory.dmp

Filesize
6.4MB

Download

Analysis

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