tofsee | 689468657a6a412107280d600296af39e1a25c439ad8f838d02dd0de3196bde0

General

Target

file.exe
Size

274KB
MD5

9e8fd9b52cc7c49d4d6f4b06871d4ac3
SHA1

f8fda1b7940328c06fc0624410683379afa0e683
SHA256

689468657a6a412107280d600296af39e1a25c439ad8f838d02dd0de3196bde0
SHA512

a1b3e848f88dcc3e78946a239bf6a9bc095e1cf76944316a17ccd321f60103e4b4b60186fddec7b9161838c6566bfa466c5f45c55e96e50e69f09622d14e0de0
SSDEEP

3072:kEJ3SeUHEbUg295fWPlejybLCuyJAbn1EtGqxqH5Z5w9udc4JQ:pJ3Se1Ug2LWPlJLCuiAb1urMGH

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

1848 netsh.exe

pid	process
1848	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\ldungsob\ImagePath = "C:\\Windows\\SysWOW64\\ldungsob\\mtadsgzj.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:

file.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\International\Geo\Nation file.exe
Executes dropped EXE 1 IoCs

Processes:

mtadsgzj.exe

pid process

4288 mtadsgzj.exe
Drops file in System32 directory 1 IoCs

Processes:

svchost.exe

description ioc process

File created C:\Windows\SysWOW64\config\systemprofile:.repos svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

mtadsgzj.exe

description pid process target process

PID 4288 set thread context of 2600 4288 mtadsgzj.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

752 sc.exe
4880 sc.exe
2096 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

4308 4028 WerFault.exe file.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\International\Geo\Nation	file.exe

pid	process
4288	mtadsgzj.exe

description	ioc	process
File created	C:\Windows\SysWOW64\config\systemprofile:.repos	svchost.exe

description	pid	process	target process
PID 4288 set thread context of 2600	4288	mtadsgzj.exe	svchost.exe

pid	process
752	sc.exe
4880	sc.exe
2096	sc.exe

pid	pid_target	process	target process
4308	4028	WerFault.exe	file.exe

Modifies data under HKEY_USERS 2 IoCs

Processes:

svchost.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\Control Panel\Buses	svchost.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Control Panel\Buses\Config0 = 2cfc943d7777790124edb47d450dd49d084297dce82e72baa4919efd84205d1d298fff7287cd945d24edb47d470dd49d024195daf71261adc06d04fda6e22673bbc9154961cda56811d48445773be7af644490bdb57b26ef955f07caf58d3c74bbc4103d32f5a56b10d98649760db8f2054991cfdb2470dd906d5d8dc4bc642ed094440b37fda15d579fc2223064b9f86400c58fb27826ef965a01cdc4e13b7e85c12b496da0f15d15d881447435e7ab5718f459a4e214a91e8068fdc48d541ce4ad744a6bbfff02579fc27d440dd49d642df4caeec40298a46d34fdc741461ee4ad743c3cfdba6b12c383486a3fe1a9642df4bd844d14dda46d34fdc48d541de4ad743d04cd945d24edb47d440dd49d642df4bd844d14dda46d34fdc48d541de4ad743de7cc945d	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

file.exemtadsgzj.exe

description	pid	process	target process
PID 4028 wrote to memory of 4640	4028	file.exe	cmd.exe
PID 4028 wrote to memory of 4640	4028	file.exe	cmd.exe
PID 4028 wrote to memory of 4640	4028	file.exe	cmd.exe
PID 4028 wrote to memory of 860	4028	file.exe	cmd.exe
PID 4028 wrote to memory of 860	4028	file.exe	cmd.exe
PID 4028 wrote to memory of 860	4028	file.exe	cmd.exe
PID 4028 wrote to memory of 752	4028	file.exe	sc.exe
PID 4028 wrote to memory of 752	4028	file.exe	sc.exe
PID 4028 wrote to memory of 752	4028	file.exe	sc.exe
PID 4028 wrote to memory of 4880	4028	file.exe	sc.exe
PID 4028 wrote to memory of 4880	4028	file.exe	sc.exe
PID 4028 wrote to memory of 4880	4028	file.exe	sc.exe
PID 4028 wrote to memory of 2096	4028	file.exe	sc.exe
PID 4028 wrote to memory of 2096	4028	file.exe	sc.exe
PID 4028 wrote to memory of 2096	4028	file.exe	sc.exe
PID 4028 wrote to memory of 1848	4028	file.exe	netsh.exe
PID 4028 wrote to memory of 1848	4028	file.exe	netsh.exe
PID 4028 wrote to memory of 1848	4028	file.exe	netsh.exe
PID 4288 wrote to memory of 2600	4288	mtadsgzj.exe	svchost.exe
PID 4288 wrote to memory of 2600	4288	mtadsgzj.exe	svchost.exe
PID 4288 wrote to memory of 2600	4288	mtadsgzj.exe	svchost.exe
PID 4288 wrote to memory of 2600	4288	mtadsgzj.exe	svchost.exe
PID 4288 wrote to memory of 2600	4288	mtadsgzj.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4028

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ldungsob\
2⤵
PID:4640

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\mtadsgzj.exe" C:\Windows\SysWOW64\ldungsob\
2⤵
PID:860

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create ldungsob binPath= "C:\Windows\SysWOW64\ldungsob\mtadsgzj.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:752

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description ldungsob "wifi internet conection"
2⤵
- Launches sc.exe
PID:4880

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start ldungsob
2⤵
- Launches sc.exe
PID:2096

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:1848

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4028 -s 1044
2⤵
- Program crash
PID:4308

C:\Windows\SysWOW64\ldungsob\mtadsgzj.exe
C:\Windows\SysWOW64\ldungsob\mtadsgzj.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4288

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Drops file in System32 directory
- Modifies data under HKEY_USERS
PID:2600

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4028 -ip 4028
1⤵
PID:4620

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\mtadsgzj.exe
Filesize
13.9MB

MD5
78eb28ed93fa2bbbaab9cb469e836bfb

SHA1
779d533dbe80261b7d797fd1429cc82fd7634d30

SHA256
d75d4e31c163277131672ff2e8b73112a77586f60b11008109f3ea7d404aeead

SHA512
c8790142d8a76b6e786f09ffc372286553c2f28c2c33859b265628f3543c448bd2213fe3a4170913591f84de1d7fd1c84ae4a67df5299c89f414e27979af912c

Download Submit
C:\Windows\SysWOW64\ldungsob\mtadsgzj.exe
Filesize
13.9MB

MD5
78eb28ed93fa2bbbaab9cb469e836bfb

SHA1
779d533dbe80261b7d797fd1429cc82fd7634d30

SHA256
d75d4e31c163277131672ff2e8b73112a77586f60b11008109f3ea7d404aeead

SHA512
c8790142d8a76b6e786f09ffc372286553c2f28c2c33859b265628f3543c448bd2213fe3a4170913591f84de1d7fd1c84ae4a67df5299c89f414e27979af912c

Download Submit
memory/2600-140-0x0000000000AE0000-0x0000000000AF5000-memory.dmp

Filesize
84KB

Download
memory/2600-145-0x0000000000AE0000-0x0000000000AF5000-memory.dmp

Filesize
84KB

Download
memory/2600-146-0x0000000000AE0000-0x0000000000AF5000-memory.dmp

Filesize
84KB

Download
memory/2600-147-0x0000000000AE0000-0x0000000000AF5000-memory.dmp

Filesize
84KB

Download
memory/2600-149-0x0000000000AE0000-0x0000000000AF5000-memory.dmp

Filesize
84KB

Download
memory/4028-134-0x00000000023C0000-0x00000000023D3000-memory.dmp

Filesize
76KB

Download
memory/4028-144-0x0000000000400000-0x000000000068A000-memory.dmp

Filesize
2.5MB

Download
memory/4288-139-0x0000000000E40000-0x0000000000E53000-memory.dmp

Filesize
76KB

Download
memory/4288-142-0x0000000000400000-0x000000000068A000-memory.dmp

Filesize
2.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads