tofsee | 3d40e81224ca9620c592189da91429622a1493384561ab839bfb9c0ad3869e06

General

Target

3d40e81224ca9620c592189da91429622a1493384561ab839bfb9c0ad3869e06.exe
Size

113KB
MD5

bb99840487a3b6cd641612b2d02cd14a
SHA1

6231dd81359dbc961b572ed5191756c0d8f910f9
SHA256

3d40e81224ca9620c592189da91429622a1493384561ab839bfb9c0ad3869e06
SHA512

ab420f39ef21cf0eebf395fe5506ef87ab02adab8f15366c9deecb17e5266ee88ade649e8cabc19d9538da579a2fec69983ae7e160fb48c35d21e95890112ce2

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

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:

gxqtanzy.exe

pid process

4972 gxqtanzy.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

1532 netsh.exe

pid	process
4972	gxqtanzy.exe

pid	process
1532	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\gwgbprrv\ImagePath = "C:\\Windows\\SysWOW64\\gwgbprrv\\gxqtanzy.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:

3d40e81224ca9620c592189da91429622a1493384561ab839bfb9c0ad3869e06.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation	3d40e81224ca9620c592189da91429622a1493384561ab839bfb9c0ad3869e06.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

gxqtanzy.exe

description pid process target process

PID 4972 set thread context of 1244 4972 gxqtanzy.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

1596 sc.exe
5032 sc.exe
2072 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 4972 set thread context of 1244	4972	gxqtanzy.exe	svchost.exe

pid	process
1596	sc.exe
5032	sc.exe
2072	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

3d40e81224ca9620c592189da91429622a1493384561ab839bfb9c0ad3869e06.exegxqtanzy.exe

description	pid	process	target process
PID 1524 wrote to memory of 544	1524	3d40e81224ca9620c592189da91429622a1493384561ab839bfb9c0ad3869e06.exe	cmd.exe
PID 1524 wrote to memory of 544	1524	3d40e81224ca9620c592189da91429622a1493384561ab839bfb9c0ad3869e06.exe	cmd.exe
PID 1524 wrote to memory of 544	1524	3d40e81224ca9620c592189da91429622a1493384561ab839bfb9c0ad3869e06.exe	cmd.exe
PID 1524 wrote to memory of 448	1524	3d40e81224ca9620c592189da91429622a1493384561ab839bfb9c0ad3869e06.exe	cmd.exe
PID 1524 wrote to memory of 448	1524	3d40e81224ca9620c592189da91429622a1493384561ab839bfb9c0ad3869e06.exe	cmd.exe
PID 1524 wrote to memory of 448	1524	3d40e81224ca9620c592189da91429622a1493384561ab839bfb9c0ad3869e06.exe	cmd.exe
PID 1524 wrote to memory of 1596	1524	3d40e81224ca9620c592189da91429622a1493384561ab839bfb9c0ad3869e06.exe	sc.exe
PID 1524 wrote to memory of 1596	1524	3d40e81224ca9620c592189da91429622a1493384561ab839bfb9c0ad3869e06.exe	sc.exe
PID 1524 wrote to memory of 1596	1524	3d40e81224ca9620c592189da91429622a1493384561ab839bfb9c0ad3869e06.exe	sc.exe
PID 1524 wrote to memory of 5032	1524	3d40e81224ca9620c592189da91429622a1493384561ab839bfb9c0ad3869e06.exe	sc.exe
PID 1524 wrote to memory of 5032	1524	3d40e81224ca9620c592189da91429622a1493384561ab839bfb9c0ad3869e06.exe	sc.exe
PID 1524 wrote to memory of 5032	1524	3d40e81224ca9620c592189da91429622a1493384561ab839bfb9c0ad3869e06.exe	sc.exe
PID 1524 wrote to memory of 2072	1524	3d40e81224ca9620c592189da91429622a1493384561ab839bfb9c0ad3869e06.exe	sc.exe
PID 1524 wrote to memory of 2072	1524	3d40e81224ca9620c592189da91429622a1493384561ab839bfb9c0ad3869e06.exe	sc.exe
PID 1524 wrote to memory of 2072	1524	3d40e81224ca9620c592189da91429622a1493384561ab839bfb9c0ad3869e06.exe	sc.exe
PID 1524 wrote to memory of 1532	1524	3d40e81224ca9620c592189da91429622a1493384561ab839bfb9c0ad3869e06.exe	netsh.exe
PID 1524 wrote to memory of 1532	1524	3d40e81224ca9620c592189da91429622a1493384561ab839bfb9c0ad3869e06.exe	netsh.exe
PID 1524 wrote to memory of 1532	1524	3d40e81224ca9620c592189da91429622a1493384561ab839bfb9c0ad3869e06.exe	netsh.exe
PID 4972 wrote to memory of 1244	4972	gxqtanzy.exe	svchost.exe
PID 4972 wrote to memory of 1244	4972	gxqtanzy.exe	svchost.exe
PID 4972 wrote to memory of 1244	4972	gxqtanzy.exe	svchost.exe
PID 4972 wrote to memory of 1244	4972	gxqtanzy.exe	svchost.exe
PID 4972 wrote to memory of 1244	4972	gxqtanzy.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\3d40e81224ca9620c592189da91429622a1493384561ab839bfb9c0ad3869e06.exe
"C:\Users\Admin\AppData\Local\Temp\3d40e81224ca9620c592189da91429622a1493384561ab839bfb9c0ad3869e06.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1524

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\gwgbprrv\
2⤵
PID:544

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gxqtanzy.exe" C:\Windows\SysWOW64\gwgbprrv\
2⤵
PID:448

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create gwgbprrv binPath= "C:\Windows\SysWOW64\gwgbprrv\gxqtanzy.exe /d\"C:\Users\Admin\AppData\Local\Temp\3d40e81224ca9620c592189da91429622a1493384561ab839bfb9c0ad3869e06.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1596

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description gwgbprrv "wifi internet conection"
2⤵
- Launches sc.exe
PID:5032

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start gwgbprrv
2⤵
- Launches sc.exe
PID:2072

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:1532

C:\Windows\SysWOW64\gwgbprrv\gxqtanzy.exe
C:\Windows\SysWOW64\gwgbprrv\gxqtanzy.exe /d"C:\Users\Admin\AppData\Local\Temp\3d40e81224ca9620c592189da91429622a1493384561ab839bfb9c0ad3869e06.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4972

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
PID:1244

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\gxqtanzy.exe
Filesize
10.4MB

MD5
007c0d733f88acc9c4341d6b32bf7d68

SHA1
b04c85845c9164407e189f7da955dcdb8b40bfe6

SHA256
620c47d19e2e139c8bf5125449a99c4eba20994206eb84ce8a327ab4d238c42c

SHA512
c2017cbd66a335430028c7d4f8b83d5160173466f2f0b9bc50e71d2657edf13e2d46fcc92f9e5478d057e9433f95a434d9a436009bfbf030aacd59243db8001f

Download Submit
C:\Windows\SysWOW64\gwgbprrv\gxqtanzy.exe
Filesize
10.4MB

MD5
007c0d733f88acc9c4341d6b32bf7d68

SHA1
b04c85845c9164407e189f7da955dcdb8b40bfe6

SHA256
620c47d19e2e139c8bf5125449a99c4eba20994206eb84ce8a327ab4d238c42c

SHA512
c2017cbd66a335430028c7d4f8b83d5160173466f2f0b9bc50e71d2657edf13e2d46fcc92f9e5478d057e9433f95a434d9a436009bfbf030aacd59243db8001f

Download Submit
memory/448-133-0x0000000000000000-mapping.dmp

Download
memory/544-132-0x0000000000000000-mapping.dmp

Download
memory/1244-142-0x0000000000000000-mapping.dmp

Download
memory/1244-143-0x00000000007C0000-0x00000000007D5000-memory.dmp

Filesize
84KB

Download
memory/1244-147-0x00000000007C0000-0x00000000007D5000-memory.dmp

Filesize
84KB

Download
memory/1244-148-0x00000000007C0000-0x00000000007D5000-memory.dmp

Filesize
84KB

Download
memory/1524-139-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/1524-131-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/1524-130-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/1532-138-0x0000000000000000-mapping.dmp

Download
memory/1596-135-0x0000000000000000-mapping.dmp

Download
memory/2072-137-0x0000000000000000-mapping.dmp

Download
memory/4972-141-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4972-145-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5032-136-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads