tofsee | 63e235b92d97d6c3d5a5dca42f31279b674d3140affc1e26c5971d12fc1d7667

General

Target

file.exe
Size

298KB
MD5

b7c137a18093f43fa0ac50865cc34f9c
SHA1

93727de39d92f6934d4ddee26728b207a212428e
SHA256

63e235b92d97d6c3d5a5dca42f31279b674d3140affc1e26c5971d12fc1d7667
SHA512

40683347b6f3dd2f18d15d5bfaa64d98f6ca88d1497bac811483366c59e5c786914dd32445981f774666b20053390f18d5a01f278162ba85bf75866edf6c95d6
SSDEEP

3072:/UgGk8D2CKiH+U3XmE5kDOXkqVDE/zpUp+rqdyy76kgREiwUP7A6qVxWm5iT/Hrq:Ret/X/GDwpELm04B710Ej2qVA8i

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

3256 netsh.exe

pid	process
3256	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\qigyihwj\ImagePath = "C:\\Windows\\SysWOW64\\qigyihwj\\jvdagtzx.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-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\International\Geo\Nation file.exe
Executes dropped EXE 1 IoCs

Processes:

jvdagtzx.exe

pid process

4456 jvdagtzx.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:

jvdagtzx.exe

description pid process target process

PID 4456 set thread context of 3544 4456 jvdagtzx.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

3000 sc.exe
4356 sc.exe
1048 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid pid_target process target process

3752 2700 WerFault.exe file.exe
3856 4456 WerFault.exe jvdagtzx.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\International\Geo\Nation	file.exe

pid	process
4456	jvdagtzx.exe

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

description	pid	process	target process
PID 4456 set thread context of 3544	4456	jvdagtzx.exe	svchost.exe

pid	process
3000	sc.exe
4356	sc.exe
1048	sc.exe

pid	pid_target	process	target process
3752	2700	WerFault.exe	file.exe
3856	4456	WerFault.exe	jvdagtzx.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 = 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	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

file.exejvdagtzx.exe

description	pid	process	target process
PID 2700 wrote to memory of 1224	2700	file.exe	cmd.exe
PID 2700 wrote to memory of 1224	2700	file.exe	cmd.exe
PID 2700 wrote to memory of 1224	2700	file.exe	cmd.exe
PID 2700 wrote to memory of 944	2700	file.exe	cmd.exe
PID 2700 wrote to memory of 944	2700	file.exe	cmd.exe
PID 2700 wrote to memory of 944	2700	file.exe	cmd.exe
PID 2700 wrote to memory of 3000	2700	file.exe	sc.exe
PID 2700 wrote to memory of 3000	2700	file.exe	sc.exe
PID 2700 wrote to memory of 3000	2700	file.exe	sc.exe
PID 2700 wrote to memory of 4356	2700	file.exe	sc.exe
PID 2700 wrote to memory of 4356	2700	file.exe	sc.exe
PID 2700 wrote to memory of 4356	2700	file.exe	sc.exe
PID 2700 wrote to memory of 1048	2700	file.exe	sc.exe
PID 2700 wrote to memory of 1048	2700	file.exe	sc.exe
PID 2700 wrote to memory of 1048	2700	file.exe	sc.exe
PID 2700 wrote to memory of 3256	2700	file.exe	netsh.exe
PID 2700 wrote to memory of 3256	2700	file.exe	netsh.exe
PID 2700 wrote to memory of 3256	2700	file.exe	netsh.exe
PID 4456 wrote to memory of 3544	4456	jvdagtzx.exe	svchost.exe
PID 4456 wrote to memory of 3544	4456	jvdagtzx.exe	svchost.exe
PID 4456 wrote to memory of 3544	4456	jvdagtzx.exe	svchost.exe
PID 4456 wrote to memory of 3544	4456	jvdagtzx.exe	svchost.exe
PID 4456 wrote to memory of 3544	4456	jvdagtzx.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:2700

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qigyihwj\
2⤵
PID:1224

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jvdagtzx.exe" C:\Windows\SysWOW64\qigyihwj\
2⤵
PID:944

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create qigyihwj binPath= "C:\Windows\SysWOW64\qigyihwj\jvdagtzx.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:3000

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description qigyihwj "wifi internet conection"
2⤵
- Launches sc.exe
PID:4356

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start qigyihwj
2⤵
- Launches sc.exe
PID:1048

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:3256

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2700 -s 1036
2⤵
- Program crash
PID:3752

C:\Windows\SysWOW64\qigyihwj\jvdagtzx.exe
C:\Windows\SysWOW64\qigyihwj\jvdagtzx.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4456

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:3544

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4456 -s 508
2⤵
- Program crash
PID:3856

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 2700 -ip 2700
1⤵
PID:220

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 512 -p 4456 -ip 4456
1⤵
PID:2708

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\jvdagtzx.exe
Filesize
13.3MB

MD5
9899a62a6ec6e568a3aa38460b16b7d5

SHA1
4d014a6e3b3f463f64d789f53a5654aa884af8df

SHA256
8f7e747f5c2c414ca8e0c55f689884df397c975066c74586afebf43816dfdcf0

SHA512
02d82ccb0a09d9d961af1937c34346a2563849f3ca8f9a5ce4cc5186f4f6fbe755fd9df9a98f2337ac344bfb61d85f81995ae55c6e6fb7d911e3aed37e72850a

Download Submit
C:\Windows\SysWOW64\qigyihwj\jvdagtzx.exe
Filesize
13.3MB

MD5
9899a62a6ec6e568a3aa38460b16b7d5

SHA1
4d014a6e3b3f463f64d789f53a5654aa884af8df

SHA256
8f7e747f5c2c414ca8e0c55f689884df397c975066c74586afebf43816dfdcf0

SHA512
02d82ccb0a09d9d961af1937c34346a2563849f3ca8f9a5ce4cc5186f4f6fbe755fd9df9a98f2337ac344bfb61d85f81995ae55c6e6fb7d911e3aed37e72850a

Download Submit
memory/2700-135-0x0000000000750000-0x0000000000763000-memory.dmp

Filesize
76KB

Download
memory/2700-138-0x0000000000400000-0x00000000006C8000-memory.dmp

Filesize
2.8MB

Download
memory/3544-140-0x0000000000C00000-0x0000000000C15000-memory.dmp

Filesize
84KB

Download
memory/3544-143-0x0000000000C00000-0x0000000000C15000-memory.dmp

Filesize
84KB

Download
memory/3544-145-0x0000000000C00000-0x0000000000C15000-memory.dmp

Filesize
84KB

Download
memory/3544-146-0x0000000000C00000-0x0000000000C15000-memory.dmp

Filesize
84KB

Download
memory/3544-147-0x0000000000C00000-0x0000000000C15000-memory.dmp

Filesize
84KB

Download
memory/4456-144-0x0000000000400000-0x00000000006C8000-memory.dmp

Filesize
2.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads