tofsee | eb83af89295470eacddb4854fdce4d921f814ad636e70648ddd3b03295463492

General

Target

yoepjxj2k.exe
Size

231KB
MD5

e24bde37506309010eaaa9cd16543deb
SHA1

7b3184f8b36410489725fab73d8f3b699811fcdd
SHA256

eb83af89295470eacddb4854fdce4d921f814ad636e70648ddd3b03295463492
SHA512

13a8697c00f591bf354e8e477b0248b6668d2c5e0ea98b5b390bd6922df94a67476d9e68e017ca685d0e0d14a0bd0ab1f127476d808aefc9c06199624f8fe421
SSDEEP

3072:kJqiwS9dIvHI/vMkB3ld6iV8/1F5MwmF7a19Zubmqv5NxFul5gR/8WI4Oh6Ixq:K53dEoHM43haF5MwEakhLCyR0Wy

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

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\hyxglrza = "0"	svchost.exe

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

1512 netsh.exe

pid	process
1512	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\hyxglrza\ImagePath = "C:\\Windows\\SysWOW64\\hyxglrza\\uoogjtxj.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

1084 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

uoogjtxj.exe

pid process

1108 uoogjtxj.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:

uoogjtxj.exe

description pid process target process

PID 1108 set thread context of 1084 1108 uoogjtxj.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

876 sc.exe
1692 sc.exe
568 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
1084	svchost.exe

pid	process
1108	uoogjtxj.exe

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

description	pid	process	target process
PID 1108 set thread context of 1084	1108	uoogjtxj.exe	svchost.exe

pid	process
876	sc.exe
1692	sc.exe
568	sc.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 30 IoCs

Processes:

yoepjxj2k.exeuoogjtxj.exe

description	pid	process	target process
PID 1608 wrote to memory of 2000	1608	yoepjxj2k.exe	cmd.exe
PID 1608 wrote to memory of 2000	1608	yoepjxj2k.exe	cmd.exe
PID 1608 wrote to memory of 2000	1608	yoepjxj2k.exe	cmd.exe
PID 1608 wrote to memory of 2000	1608	yoepjxj2k.exe	cmd.exe
PID 1608 wrote to memory of 964	1608	yoepjxj2k.exe	cmd.exe
PID 1608 wrote to memory of 964	1608	yoepjxj2k.exe	cmd.exe
PID 1608 wrote to memory of 964	1608	yoepjxj2k.exe	cmd.exe
PID 1608 wrote to memory of 964	1608	yoepjxj2k.exe	cmd.exe
PID 1608 wrote to memory of 1692	1608	yoepjxj2k.exe	sc.exe
PID 1608 wrote to memory of 1692	1608	yoepjxj2k.exe	sc.exe
PID 1608 wrote to memory of 1692	1608	yoepjxj2k.exe	sc.exe
PID 1608 wrote to memory of 1692	1608	yoepjxj2k.exe	sc.exe
PID 1608 wrote to memory of 568	1608	yoepjxj2k.exe	sc.exe
PID 1608 wrote to memory of 568	1608	yoepjxj2k.exe	sc.exe
PID 1608 wrote to memory of 568	1608	yoepjxj2k.exe	sc.exe
PID 1608 wrote to memory of 568	1608	yoepjxj2k.exe	sc.exe
PID 1608 wrote to memory of 876	1608	yoepjxj2k.exe	sc.exe
PID 1608 wrote to memory of 876	1608	yoepjxj2k.exe	sc.exe
PID 1608 wrote to memory of 876	1608	yoepjxj2k.exe	sc.exe
PID 1608 wrote to memory of 876	1608	yoepjxj2k.exe	sc.exe
PID 1608 wrote to memory of 1512	1608	yoepjxj2k.exe	netsh.exe
PID 1608 wrote to memory of 1512	1608	yoepjxj2k.exe	netsh.exe
PID 1608 wrote to memory of 1512	1608	yoepjxj2k.exe	netsh.exe
PID 1608 wrote to memory of 1512	1608	yoepjxj2k.exe	netsh.exe
PID 1108 wrote to memory of 1084	1108	uoogjtxj.exe	svchost.exe
PID 1108 wrote to memory of 1084	1108	uoogjtxj.exe	svchost.exe
PID 1108 wrote to memory of 1084	1108	uoogjtxj.exe	svchost.exe
PID 1108 wrote to memory of 1084	1108	uoogjtxj.exe	svchost.exe
PID 1108 wrote to memory of 1084	1108	uoogjtxj.exe	svchost.exe
PID 1108 wrote to memory of 1084	1108	uoogjtxj.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\yoepjxj2k.exe
"C:\Users\Admin\AppData\Local\Temp\yoepjxj2k.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1608

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hyxglrza\
2⤵
PID:2000

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\uoogjtxj.exe" C:\Windows\SysWOW64\hyxglrza\
2⤵
PID:964

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create hyxglrza binPath= "C:\Windows\SysWOW64\hyxglrza\uoogjtxj.exe /d\"C:\Users\Admin\AppData\Local\Temp\yoepjxj2k.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1692

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description hyxglrza "wifi internet conection"
2⤵
- Launches sc.exe
PID:568

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start hyxglrza
2⤵
- Launches sc.exe
PID:876

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:1512

C:\Windows\SysWOW64\hyxglrza\uoogjtxj.exe
C:\Windows\SysWOW64\hyxglrza\uoogjtxj.exe /d"C:\Users\Admin\AppData\Local\Temp\yoepjxj2k.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1108

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Windows security bypass
- Sets service image path in registry
- Deletes itself
- Drops file in System32 directory
- Modifies data under HKEY_USERS
PID:1084

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

Disabling Security Tools

1

T1089

Modify Registry

2

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\uoogjtxj.exe
Filesize
11.8MB

MD5
9054736ef23d4d165088163b9009ce40

SHA1
aa017295e00fbc0c95bea1c19c409c3a879d878e

SHA256
339df970b143499905b4773c359697509477453fab4e7aed17f7f0813e4987d8

SHA512
2be00a953faf992d903c2eccb3115dc8d429c1628afdcf0c553f2c688d3742fb8b10993ced51f644a5744aba1c0b33425e7d7d85ed91a5ad6c307a18b824ce73

Download Submit
C:\Windows\SysWOW64\hyxglrza\uoogjtxj.exe
Filesize
11.8MB

MD5
9054736ef23d4d165088163b9009ce40

SHA1
aa017295e00fbc0c95bea1c19c409c3a879d878e

SHA256
339df970b143499905b4773c359697509477453fab4e7aed17f7f0813e4987d8

SHA512
2be00a953faf992d903c2eccb3115dc8d429c1628afdcf0c553f2c688d3742fb8b10993ced51f644a5744aba1c0b33425e7d7d85ed91a5ad6c307a18b824ce73

Download Submit
memory/1084-68-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1084-63-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1084-62-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1084-64-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1084-69-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1084-70-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1084-72-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1108-65-0x0000000000400000-0x00000000006BA000-memory.dmp

Filesize
2.7MB

Download
memory/1608-59-0x0000000000400000-0x00000000006BA000-memory.dmp

Filesize
2.7MB

Download
memory/1608-58-0x0000000000400000-0x00000000006BA000-memory.dmp

Filesize
2.7MB

Download
memory/1608-56-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads