tofsee | dc0ec3405d05046753c376f33fcd545d03b4781983d4b26103de9419b4334963

General

Target

dc0ec3405d05046753c376f33fcd545d03b4781983d4b26103de9419b4334963.exe
Size

147KB
MD5

245a32c6b70bf744448625ca6d897a57
SHA1

67a7ca7893d555651eb6a38bc22fb9aeacffcec2
SHA256

dc0ec3405d05046753c376f33fcd545d03b4781983d4b26103de9419b4334963
SHA512

aa40eb9fd15e087b346086421b6efdbecc97980868d1404fa32e8ca90a118f3986aef668554ba67badf1dc58ef88c1d688ebe193fed3d3f5dd435d392d3665af
SSDEEP

3072:GFuoANbriTl655frf0zvNDoM2bTXtFW5mMSjv:JbbrHT0zxnoTeo

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

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
Executes dropped EXE 1 IoCs

Processes:

iudrqmva.exe

pid process

2888 iudrqmva.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

2296 netsh.exe

pid	process
2888	iudrqmva.exe

pid	process
2296	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\ftcehnae\ImagePath = "C:\\Windows\\SysWOW64\\ftcehnae\\iudrqmva.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:

dc0ec3405d05046753c376f33fcd545d03b4781983d4b26103de9419b4334963.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	dc0ec3405d05046753c376f33fcd545d03b4781983d4b26103de9419b4334963.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

iudrqmva.exe

description pid process target process

PID 2888 set thread context of 860 2888 iudrqmva.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

2292 sc.exe
1672 sc.exe
516 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	pid	process	target process
PID 2888 set thread context of 860	2888	iudrqmva.exe	svchost.exe

pid	process
2292	sc.exe
1672	sc.exe
516	sc.exe

Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid	pid_target	process	target process
948	2200	WerFault.exe	dc0ec3405d05046753c376f33fcd545d03b4781983d4b26103de9419b4334963.exe
5100	2888	WerFault.exe	iudrqmva.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

dc0ec3405d05046753c376f33fcd545d03b4781983d4b26103de9419b4334963.exeiudrqmva.exe

description	pid	process	target process
PID 2200 wrote to memory of 5028	2200	dc0ec3405d05046753c376f33fcd545d03b4781983d4b26103de9419b4334963.exe	cmd.exe
PID 2200 wrote to memory of 5028	2200	dc0ec3405d05046753c376f33fcd545d03b4781983d4b26103de9419b4334963.exe	cmd.exe
PID 2200 wrote to memory of 5028	2200	dc0ec3405d05046753c376f33fcd545d03b4781983d4b26103de9419b4334963.exe	cmd.exe
PID 2200 wrote to memory of 1820	2200	dc0ec3405d05046753c376f33fcd545d03b4781983d4b26103de9419b4334963.exe	cmd.exe
PID 2200 wrote to memory of 1820	2200	dc0ec3405d05046753c376f33fcd545d03b4781983d4b26103de9419b4334963.exe	cmd.exe
PID 2200 wrote to memory of 1820	2200	dc0ec3405d05046753c376f33fcd545d03b4781983d4b26103de9419b4334963.exe	cmd.exe
PID 2200 wrote to memory of 2292	2200	dc0ec3405d05046753c376f33fcd545d03b4781983d4b26103de9419b4334963.exe	sc.exe
PID 2200 wrote to memory of 2292	2200	dc0ec3405d05046753c376f33fcd545d03b4781983d4b26103de9419b4334963.exe	sc.exe
PID 2200 wrote to memory of 2292	2200	dc0ec3405d05046753c376f33fcd545d03b4781983d4b26103de9419b4334963.exe	sc.exe
PID 2200 wrote to memory of 1672	2200	dc0ec3405d05046753c376f33fcd545d03b4781983d4b26103de9419b4334963.exe	sc.exe
PID 2200 wrote to memory of 1672	2200	dc0ec3405d05046753c376f33fcd545d03b4781983d4b26103de9419b4334963.exe	sc.exe
PID 2200 wrote to memory of 1672	2200	dc0ec3405d05046753c376f33fcd545d03b4781983d4b26103de9419b4334963.exe	sc.exe
PID 2200 wrote to memory of 516	2200	dc0ec3405d05046753c376f33fcd545d03b4781983d4b26103de9419b4334963.exe	sc.exe
PID 2200 wrote to memory of 516	2200	dc0ec3405d05046753c376f33fcd545d03b4781983d4b26103de9419b4334963.exe	sc.exe
PID 2200 wrote to memory of 516	2200	dc0ec3405d05046753c376f33fcd545d03b4781983d4b26103de9419b4334963.exe	sc.exe
PID 2200 wrote to memory of 2296	2200	dc0ec3405d05046753c376f33fcd545d03b4781983d4b26103de9419b4334963.exe	netsh.exe
PID 2200 wrote to memory of 2296	2200	dc0ec3405d05046753c376f33fcd545d03b4781983d4b26103de9419b4334963.exe	netsh.exe
PID 2200 wrote to memory of 2296	2200	dc0ec3405d05046753c376f33fcd545d03b4781983d4b26103de9419b4334963.exe	netsh.exe
PID 2888 wrote to memory of 860	2888	iudrqmva.exe	svchost.exe
PID 2888 wrote to memory of 860	2888	iudrqmva.exe	svchost.exe
PID 2888 wrote to memory of 860	2888	iudrqmva.exe	svchost.exe
PID 2888 wrote to memory of 860	2888	iudrqmva.exe	svchost.exe
PID 2888 wrote to memory of 860	2888	iudrqmva.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\dc0ec3405d05046753c376f33fcd545d03b4781983d4b26103de9419b4334963.exe
"C:\Users\Admin\AppData\Local\Temp\dc0ec3405d05046753c376f33fcd545d03b4781983d4b26103de9419b4334963.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2200

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ftcehnae\
2⤵
PID:5028

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\iudrqmva.exe" C:\Windows\SysWOW64\ftcehnae\
2⤵
PID:1820

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create ftcehnae binPath= "C:\Windows\SysWOW64\ftcehnae\iudrqmva.exe /d\"C:\Users\Admin\AppData\Local\Temp\dc0ec3405d05046753c376f33fcd545d03b4781983d4b26103de9419b4334963.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:2292

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description ftcehnae "wifi internet conection"
2⤵
- Launches sc.exe
PID:1672

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start ftcehnae
2⤵
- Launches sc.exe
PID:516

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:2296

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2200 -s 1036
2⤵
- Program crash
PID:948

C:\Windows\SysWOW64\ftcehnae\iudrqmva.exe
C:\Windows\SysWOW64\ftcehnae\iudrqmva.exe /d"C:\Users\Admin\AppData\Local\Temp\dc0ec3405d05046753c376f33fcd545d03b4781983d4b26103de9419b4334963.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2888

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
PID:860

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2888 -s 516
2⤵
- Program crash
PID:5100

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2200 -ip 2200
1⤵
PID:3804

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 2888 -ip 2888
1⤵
PID:116

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\iudrqmva.exe
Filesize
11.3MB

MD5
50deb2089926507160f9d3233b470da6

SHA1
3e95f6ad6f1f13c0ad2a0540d22e3c1a5ba4d49d

SHA256
fff31b7e7d54d11b408ff7753eaecd27f459c6921ccb8d863676f3fbd2140119

SHA512
6630f5cfeb1dc177f84217b9656235286c02a8a94203e0d2edd5138a2279bb3e0ea4aea0e3888ffdf5b2293a0873641f620d8ed161119aab1df830ac33d7fb22

Download Submit
C:\Windows\SysWOW64\ftcehnae\iudrqmva.exe
Filesize
11.3MB

MD5
50deb2089926507160f9d3233b470da6

SHA1
3e95f6ad6f1f13c0ad2a0540d22e3c1a5ba4d49d

SHA256
fff31b7e7d54d11b408ff7753eaecd27f459c6921ccb8d863676f3fbd2140119

SHA512
6630f5cfeb1dc177f84217b9656235286c02a8a94203e0d2edd5138a2279bb3e0ea4aea0e3888ffdf5b2293a0873641f620d8ed161119aab1df830ac33d7fb22

Download Submit
memory/516-140-0x0000000000000000-mapping.dmp

Download
memory/860-144-0x0000000000000000-mapping.dmp

Download
memory/860-145-0x0000000000D60000-0x0000000000D75000-memory.dmp

Filesize
84KB

Download
memory/860-151-0x0000000000D60000-0x0000000000D75000-memory.dmp

Filesize
84KB

Download
memory/860-150-0x0000000000D60000-0x0000000000D75000-memory.dmp

Filesize
84KB

Download
memory/1672-139-0x0000000000000000-mapping.dmp

Download
memory/1820-136-0x0000000000000000-mapping.dmp

Download
memory/2200-134-0x0000000000C50000-0x0000000000C63000-memory.dmp

Filesize
76KB

Download
memory/2200-133-0x0000000000B5D000-0x0000000000B6D000-memory.dmp

Filesize
64KB

Download
memory/2200-143-0x0000000000400000-0x0000000000AD6000-memory.dmp

Filesize
6.8MB

Download
memory/2200-135-0x0000000000400000-0x0000000000AD6000-memory.dmp

Filesize
6.8MB

Download
memory/2292-138-0x0000000000000000-mapping.dmp

Download
memory/2296-142-0x0000000000000000-mapping.dmp

Download
memory/2888-148-0x0000000000C59000-0x0000000000C69000-memory.dmp

Filesize
64KB

Download
memory/2888-149-0x0000000000400000-0x0000000000AD6000-memory.dmp

Filesize
6.8MB

Download
memory/5028-132-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads