tofsee | 936ba202d93326862cec01d25e4092511f2362416ccf068d0f54b344cab20064

General

Target

02a6d9f2a8ddc0e12270e8b39b2255e3.exe
Size

12.3MB
MD5

02a6d9f2a8ddc0e12270e8b39b2255e3
SHA1

d280cf802d5548da4b59a2d7fa4d3d7cf434dac5
SHA256

936ba202d93326862cec01d25e4092511f2362416ccf068d0f54b344cab20064
SHA512

729f4775b7c8381df1a4b620551672893c9c736216482712ef25d849eea4b691b42ad6b3a6654779346748a066bfc8135471bd2c6581f6fea81be18251f72ce1
SSDEEP

49152:kvVGWdbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb:kvV

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.6

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

Windows Service
T1543.003

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Windows Service

T1543.003

pid	Process
4036	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\zxipdrks\ImagePath = "C:\\Windows\\SysWOW64\\zxipdrks\\jfxvdmph.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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2398549320-3657759451-817663969-1000\Control Panel\International\Geo\Nation	02a6d9f2a8ddc0e12270e8b39b2255e3.exe

Deletes itself 1 IoCs

pid	Process
3456	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4988	jfxvdmph.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4988 set thread context of 3456	4988	jfxvdmph.exe	111

Launches sc.exe 3 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
1044	sc.exe
960	sc.exe
5024	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

pid	pid_target	Process	procid_target
2200	5100	WerFault.exe	87
448	4988	WerFault.exe	100

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 5100 wrote to memory of 3740	5100	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	91
PID 5100 wrote to memory of 3740	5100	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	91
PID 5100 wrote to memory of 3740	5100	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	91
PID 5100 wrote to memory of 632	5100	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	92
PID 5100 wrote to memory of 632	5100	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	92
PID 5100 wrote to memory of 632	5100	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	92
PID 5100 wrote to memory of 960	5100	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	95
PID 5100 wrote to memory of 960	5100	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	95
PID 5100 wrote to memory of 960	5100	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	95
PID 5100 wrote to memory of 5024	5100	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	97
PID 5100 wrote to memory of 5024	5100	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	97
PID 5100 wrote to memory of 5024	5100	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	97
PID 5100 wrote to memory of 1044	5100	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	98
PID 5100 wrote to memory of 1044	5100	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	98
PID 5100 wrote to memory of 1044	5100	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	98
PID 5100 wrote to memory of 4036	5100	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	101
PID 5100 wrote to memory of 4036	5100	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	101
PID 5100 wrote to memory of 4036	5100	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	101
PID 4988 wrote to memory of 3456	4988	jfxvdmph.exe	111
PID 4988 wrote to memory of 3456	4988	jfxvdmph.exe	111
PID 4988 wrote to memory of 3456	4988	jfxvdmph.exe	111
PID 4988 wrote to memory of 3456	4988	jfxvdmph.exe	111
PID 4988 wrote to memory of 3456	4988	jfxvdmph.exe	111

C:\Users\Admin\AppData\Local\Temp\02a6d9f2a8ddc0e12270e8b39b2255e3.exe
"C:\Users\Admin\AppData\Local\Temp\02a6d9f2a8ddc0e12270e8b39b2255e3.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5100
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zxipdrks\
  2⤵
  PID:3740
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jfxvdmph.exe" C:\Windows\SysWOW64\zxipdrks\
  2⤵
  PID:632
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create zxipdrks binPath= "C:\Windows\SysWOW64\zxipdrks\jfxvdmph.exe /d\"C:\Users\Admin\AppData\Local\Temp\02a6d9f2a8ddc0e12270e8b39b2255e3.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:960
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description zxipdrks "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:5024
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start zxipdrks
  2⤵
  - Launches sc.exe
  PID:1044
- 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:4036
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5100 -s 1272
  2⤵
  - Program crash
  PID:2200

C:\Windows\SysWOW64\zxipdrks\jfxvdmph.exe
C:\Windows\SysWOW64\zxipdrks\jfxvdmph.exe /d"C:\Users\Admin\AppData\Local\Temp\02a6d9f2a8ddc0e12270e8b39b2255e3.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4988
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:3456
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4988 -s 516
  2⤵
  - Program crash
  PID:448

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 5100 -ip 5100
1⤵
PID:4896

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 4988 -ip 4988
1⤵
PID:1240

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

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

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\jfxvdmph.exe

Filesize
8.7MB

MD5
f0bf21b9eed8de0b3bc74e7250c0abb4

SHA1
ab5bbae3414d6722471d2bda6498f4f770a34e6d

SHA256
3f11afbe0d9b91aeec98b380793bbb57e1a843e990bb2df93b022d3b88e9a461

SHA512
590f2d7a51afe80bce3640089fe21b951315558ae9bf5cb70ea01e8670b0318cf998a8b3e693fd54ca05e9ea73821fda77f29121b978181574eea16f44fd35b0

Download Submit
C:\Windows\SysWOW64\zxipdrks\jfxvdmph.exe

Filesize
8.2MB

MD5
990cdd4aadd3ed9f960ab69c05011bdc

SHA1
b41fd1e01693775f2148bf43907321852fcd83c8

SHA256
a04b573ee134c5c0a7262989cac4378f133e673dbc7bb4f5c4a9fa701b16153d

SHA512
fc406b3bed6a05d7d8ec45712ff986154a544d02fc0ee72ebfdb3f70ba46621f849210640eaea3467810ce705151ee95e3fcbbba987cc789f896ad9af124fae1

Download Submit
memory/3456-13-0x0000000000B50000-0x0000000000B65000-memory.dmp

Filesize
84KB

Download
memory/3456-20-0x0000000000B50000-0x0000000000B65000-memory.dmp

Filesize
84KB

Download
memory/3456-18-0x0000000000B50000-0x0000000000B65000-memory.dmp

Filesize
84KB

Download
memory/3456-17-0x0000000000B50000-0x0000000000B65000-memory.dmp

Filesize
84KB

Download
memory/4988-12-0x0000000000400000-0x0000000000C17000-memory.dmp

Filesize
8.1MB

Download
memory/4988-11-0x0000000000F60000-0x0000000001060000-memory.dmp

Filesize
1024KB

Download
memory/4988-19-0x0000000000400000-0x0000000000C17000-memory.dmp

Filesize
8.1MB

Download
memory/5100-9-0x0000000002960000-0x0000000002973000-memory.dmp

Filesize
76KB

Download
memory/5100-1-0x0000000000C40000-0x0000000000D40000-memory.dmp

Filesize
1024KB

Download
memory/5100-8-0x0000000000400000-0x0000000000C17000-memory.dmp

Filesize
8.1MB

Download
memory/5100-7-0x0000000000400000-0x0000000000C17000-memory.dmp

Filesize
8.1MB

Download
memory/5100-4-0x0000000000400000-0x0000000000C17000-memory.dmp

Filesize
8.1MB

Download
memory/5100-2-0x0000000002960000-0x0000000002973000-memory.dmp

Filesize
76KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads