tofsee | fa516e81e02c453789dec877af057772b5e8b5ff97e3621b3b38065aa18914a9

General

Target

0abc4b358f37c9c49835ccd3adec2130N.exe
Size

144KB
MD5

0abc4b358f37c9c49835ccd3adec2130
SHA1

3996477c3a5262fa442285319bc7e53c9b6c999d
SHA256

fa516e81e02c453789dec877af057772b5e8b5ff97e3621b3b38065aa18914a9
SHA512

904ed1c87a1be42455370329aec2f71ccff6d4dc4847b64f692ff11e509692c89d0655c935b4c02dc5b6afec2eaa192abd7f38e830c9e6200e7f5eb424105e6f
SSDEEP

1536:2ai8yRlkj5a9rNzJLGDNGrNesEfL8St26Jsvf+HI5Qlr6pVX:URlm0WDc55qL8Sg6Ji+HEQlrSR

Score

10^/10

tofsee persistence trojan

Malware Config

Extracted

Family

tofsee

C2

103.246.115.238

188.190.120.102

112.213.106.187

188.165.132.183

rgtryhbgddtyh.biz

wertdghbyrukl.ch

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee

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:

0abc4b358f37c9c49835ccd3adec2130N.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1705699165-553239100-4129523827-1000\Control Panel\International\Geo\Nation	0abc4b358f37c9c49835ccd3adec2130N.exe

Executes dropped EXE 2 IoCs

Processes:

efxvvphu.exeefxvvphu.exe

pid process

1688 efxvvphu.exe
772 efxvvphu.exe

pid	process
1688	efxvvphu.exe
772	efxvvphu.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

0abc4b358f37c9c49835ccd3adec2130N.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1705699165-553239100-4129523827-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MSConfig = "\"C:\\Users\\Admin\\efxvvphu.exe\""	0abc4b358f37c9c49835ccd3adec2130N.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

0abc4b358f37c9c49835ccd3adec2130N.exeefxvvphu.exeefxvvphu.exe

description	pid	process	target process
PID 4628 set thread context of 3528	4628	0abc4b358f37c9c49835ccd3adec2130N.exe	0abc4b358f37c9c49835ccd3adec2130N.exe
PID 1688 set thread context of 772	1688	efxvvphu.exe	efxvvphu.exe
PID 772 set thread context of 4024	772	efxvvphu.exe	svchost.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

3840 4024 WerFault.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

0abc4b358f37c9c49835ccd3adec2130N.exeefxvvphu.exe

pid process

4628 0abc4b358f37c9c49835ccd3adec2130N.exe
1688 efxvvphu.exe

pid	pid_target	process
3840	4024	WerFault.exe

pid	process
4628	0abc4b358f37c9c49835ccd3adec2130N.exe
1688	efxvvphu.exe

Suspicious use of WriteProcessMemory 29 IoCs

Processes:

0abc4b358f37c9c49835ccd3adec2130N.exe0abc4b358f37c9c49835ccd3adec2130N.exeefxvvphu.exeefxvvphu.exe

description	pid	process	target process
PID 4628 wrote to memory of 3528	4628	0abc4b358f37c9c49835ccd3adec2130N.exe	0abc4b358f37c9c49835ccd3adec2130N.exe
PID 4628 wrote to memory of 3528	4628	0abc4b358f37c9c49835ccd3adec2130N.exe	0abc4b358f37c9c49835ccd3adec2130N.exe
PID 4628 wrote to memory of 3528	4628	0abc4b358f37c9c49835ccd3adec2130N.exe	0abc4b358f37c9c49835ccd3adec2130N.exe
PID 4628 wrote to memory of 3528	4628	0abc4b358f37c9c49835ccd3adec2130N.exe	0abc4b358f37c9c49835ccd3adec2130N.exe
PID 4628 wrote to memory of 3528	4628	0abc4b358f37c9c49835ccd3adec2130N.exe	0abc4b358f37c9c49835ccd3adec2130N.exe
PID 4628 wrote to memory of 3528	4628	0abc4b358f37c9c49835ccd3adec2130N.exe	0abc4b358f37c9c49835ccd3adec2130N.exe
PID 4628 wrote to memory of 3528	4628	0abc4b358f37c9c49835ccd3adec2130N.exe	0abc4b358f37c9c49835ccd3adec2130N.exe
PID 4628 wrote to memory of 3528	4628	0abc4b358f37c9c49835ccd3adec2130N.exe	0abc4b358f37c9c49835ccd3adec2130N.exe
PID 4628 wrote to memory of 3528	4628	0abc4b358f37c9c49835ccd3adec2130N.exe	0abc4b358f37c9c49835ccd3adec2130N.exe
PID 3528 wrote to memory of 1688	3528	0abc4b358f37c9c49835ccd3adec2130N.exe	efxvvphu.exe
PID 3528 wrote to memory of 1688	3528	0abc4b358f37c9c49835ccd3adec2130N.exe	efxvvphu.exe
PID 3528 wrote to memory of 1688	3528	0abc4b358f37c9c49835ccd3adec2130N.exe	efxvvphu.exe
PID 3528 wrote to memory of 1224	3528	0abc4b358f37c9c49835ccd3adec2130N.exe	cmd.exe
PID 3528 wrote to memory of 1224	3528	0abc4b358f37c9c49835ccd3adec2130N.exe	cmd.exe
PID 3528 wrote to memory of 1224	3528	0abc4b358f37c9c49835ccd3adec2130N.exe	cmd.exe
PID 1688 wrote to memory of 772	1688	efxvvphu.exe	efxvvphu.exe
PID 1688 wrote to memory of 772	1688	efxvvphu.exe	efxvvphu.exe
PID 1688 wrote to memory of 772	1688	efxvvphu.exe	efxvvphu.exe
PID 1688 wrote to memory of 772	1688	efxvvphu.exe	efxvvphu.exe
PID 1688 wrote to memory of 772	1688	efxvvphu.exe	efxvvphu.exe
PID 1688 wrote to memory of 772	1688	efxvvphu.exe	efxvvphu.exe
PID 1688 wrote to memory of 772	1688	efxvvphu.exe	efxvvphu.exe
PID 1688 wrote to memory of 772	1688	efxvvphu.exe	efxvvphu.exe
PID 1688 wrote to memory of 772	1688	efxvvphu.exe	efxvvphu.exe
PID 772 wrote to memory of 4024	772	efxvvphu.exe	svchost.exe
PID 772 wrote to memory of 4024	772	efxvvphu.exe	svchost.exe
PID 772 wrote to memory of 4024	772	efxvvphu.exe	svchost.exe
PID 772 wrote to memory of 4024	772	efxvvphu.exe	svchost.exe
PID 772 wrote to memory of 4024	772	efxvvphu.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\0abc4b358f37c9c49835ccd3adec2130N.exe
"C:\Users\Admin\AppData\Local\Temp\0abc4b358f37c9c49835ccd3adec2130N.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4628

C:\Users\Admin\AppData\Local\Temp\0abc4b358f37c9c49835ccd3adec2130N.exe
"C:\Users\Admin\AppData\Local\Temp\0abc4b358f37c9c49835ccd3adec2130N.exe"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:3528

C:\Users\Admin\efxvvphu.exe
"C:\Users\Admin\efxvvphu.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1688

C:\Users\Admin\efxvvphu.exe
"C:\Users\Admin\efxvvphu.exe"
4⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:772

C:\Windows\SysWOW64\svchost.exe
svchost.exe
5⤵
PID:4024

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4024 -s 360
6⤵
- Program crash
PID:3840

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\1745.bat" "
3⤵
PID:1224

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 4024 -ip 4024
1⤵
PID:4824

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\1745.bat
Filesize
240B

MD5
4e3648474be1c465e98303dd88ab7a05

SHA1
35afef2cf69fed4172c0019f7d26f5c91bd63ef4

SHA256
a2989e8dd0871c9f2291625561e58e4cc552222caefc82f30a6af11cbec738dc

SHA512
2a393d93a7b4827404d9c860e9abec0baf42fff111c08ae9360830a6b35eb9bc6ff56c10e82bc7d0160fe836fe65d9418753bc9a1ecb3a8dfdddba1ef8088423

Download Submit
C:\Users\Admin\efxvvphu.exe
Filesize
44.0MB

MD5
6105bbf47574b1065582876acc4a2ec6

SHA1
06f47687cf51a1636b3462f7805414b25ca5a082

SHA256
27a019b0fea09736af9ea345bc23195fef98484d4ff9e95e7bf18048f9e21c33

SHA512
53c89b14b73b239c7fc093b4c02d7e5659fc9b7a5ee6d8c9d451766e68b192cf2c322a65b5a16fa3f14feac6771dffba755a7ad8ff7b2b2a34e78908f1c16762

Download Submit
memory/772-27-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1688-21-0x0000000000400000-0x0000000000428000-memory.dmp

Filesize
160KB

Download
memory/3528-4-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/3528-17-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/3528-6-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/3528-7-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/4024-33-0x0000000000900000-0x0000000000912000-memory.dmp

Filesize
72KB

Download
memory/4024-32-0x0000000000900000-0x0000000000912000-memory.dmp

Filesize
72KB

Download
memory/4024-26-0x0000000000900000-0x0000000000912000-memory.dmp

Filesize
72KB

Download
memory/4024-37-0x00000000029D0000-0x00000000029D1000-memory.dmp

Filesize
4KB

Download
memory/4024-38-0x0000000000900000-0x0000000000912000-memory.dmp

Filesize
72KB

Download
memory/4024-39-0x0000000000900000-0x0000000000912000-memory.dmp

Filesize
72KB

Download
memory/4628-3-0x0000000000560000-0x0000000000660000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads