tofsee | 5e3b2944312061327384f31234128bb4ddba910790f8a529f10b40de4330446d

General

Target

fcf25c18735685029b0faef2d1cb7850.exe
Size

11.8MB
MD5

fcf25c18735685029b0faef2d1cb7850
SHA1

71258bc2fe3f91053a9b5756bfe3d94a64196f0d
SHA256

5e3b2944312061327384f31234128bb4ddba910790f8a529f10b40de4330446d
SHA512

13cd2d5029bb63b1fd19f0ef79fa2de728fe2e55d6ce76ed8337d0be7c868f0c29edffbe8b9c6cbd25c604a41d9b0e22b27466bb94ffd1a24f0e9c14514a9415
SSDEEP

49152:CGvEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE:CG

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
700	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\shgflufm\ImagePath = "C:\\Windows\\SysWOW64\\shgflufm\\hnyjbqkw.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-1-5-21-635608581-3370340891-292606865-1000\Control Panel\International\Geo\Nation	fcf25c18735685029b0faef2d1cb7850.exe

Deletes itself 1 IoCs

pid	Process
452	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
5084	hnyjbqkw.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5084 set thread context of 452	5084	hnyjbqkw.exe	117

Launches sc.exe 3 IoCs

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

pid	Process
4064	sc.exe
4336	sc.exe
3148	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
416	4808	WerFault.exe	93
4744	5084	WerFault.exe	110

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4808 wrote to memory of 1176	4808	fcf25c18735685029b0faef2d1cb7850.exe	99
PID 4808 wrote to memory of 1176	4808	fcf25c18735685029b0faef2d1cb7850.exe	99
PID 4808 wrote to memory of 1176	4808	fcf25c18735685029b0faef2d1cb7850.exe	99
PID 4808 wrote to memory of 4200	4808	fcf25c18735685029b0faef2d1cb7850.exe	101
PID 4808 wrote to memory of 4200	4808	fcf25c18735685029b0faef2d1cb7850.exe	101
PID 4808 wrote to memory of 4200	4808	fcf25c18735685029b0faef2d1cb7850.exe	101
PID 4808 wrote to memory of 4064	4808	fcf25c18735685029b0faef2d1cb7850.exe	104
PID 4808 wrote to memory of 4064	4808	fcf25c18735685029b0faef2d1cb7850.exe	104
PID 4808 wrote to memory of 4064	4808	fcf25c18735685029b0faef2d1cb7850.exe	104
PID 4808 wrote to memory of 4336	4808	fcf25c18735685029b0faef2d1cb7850.exe	106
PID 4808 wrote to memory of 4336	4808	fcf25c18735685029b0faef2d1cb7850.exe	106
PID 4808 wrote to memory of 4336	4808	fcf25c18735685029b0faef2d1cb7850.exe	106
PID 4808 wrote to memory of 3148	4808	fcf25c18735685029b0faef2d1cb7850.exe	108
PID 4808 wrote to memory of 3148	4808	fcf25c18735685029b0faef2d1cb7850.exe	108
PID 4808 wrote to memory of 3148	4808	fcf25c18735685029b0faef2d1cb7850.exe	108
PID 4808 wrote to memory of 700	4808	fcf25c18735685029b0faef2d1cb7850.exe	114
PID 4808 wrote to memory of 700	4808	fcf25c18735685029b0faef2d1cb7850.exe	114
PID 4808 wrote to memory of 700	4808	fcf25c18735685029b0faef2d1cb7850.exe	114
PID 5084 wrote to memory of 452	5084	hnyjbqkw.exe	117
PID 5084 wrote to memory of 452	5084	hnyjbqkw.exe	117
PID 5084 wrote to memory of 452	5084	hnyjbqkw.exe	117
PID 5084 wrote to memory of 452	5084	hnyjbqkw.exe	117
PID 5084 wrote to memory of 452	5084	hnyjbqkw.exe	117

C:\Users\Admin\AppData\Local\Temp\fcf25c18735685029b0faef2d1cb7850.exe
"C:\Users\Admin\AppData\Local\Temp\fcf25c18735685029b0faef2d1cb7850.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4808
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\shgflufm\
  2⤵
  PID:1176
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\hnyjbqkw.exe" C:\Windows\SysWOW64\shgflufm\
  2⤵
  PID:4200
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create shgflufm binPath= "C:\Windows\SysWOW64\shgflufm\hnyjbqkw.exe /d\"C:\Users\Admin\AppData\Local\Temp\fcf25c18735685029b0faef2d1cb7850.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:4064
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description shgflufm "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:4336
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start shgflufm
  2⤵
  - Launches sc.exe
  PID:3148
- 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:700
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4808 -s 1304
  2⤵
  - Program crash
  PID:416

C:\Windows\SysWOW64\shgflufm\hnyjbqkw.exe
C:\Windows\SysWOW64\shgflufm\hnyjbqkw.exe /d"C:\Users\Admin\AppData\Local\Temp\fcf25c18735685029b0faef2d1cb7850.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5084
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:452
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5084 -s 516
  2⤵
  - Program crash
  PID:4744

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4808 -ip 4808
1⤵
PID:2720

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 5084 -ip 5084
1⤵
PID:1724

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\hnyjbqkw.exe

Filesize
3.4MB

MD5
b352d64f32e637b7453cdceab7c893d5

SHA1
1a18a019d3f26f56a96063cb7a5ff157e6462d07

SHA256
89a435e96fba9f4e2e7dd8af49fa804f60722696898e93f0c3dc85d84271453e

SHA512
3329e0dea2436865d565d8ea372f49946cae1dd0e06777b82c322db40c548cdb8831e1e5afd1f5ed0b1c7eba119e313ad2e6a49a03858384f264291bd31a638e

Download Submit
C:\Windows\SysWOW64\shgflufm\hnyjbqkw.exe

Filesize
2.2MB

MD5
613c09b686e1253d1952f2801d5d6601

SHA1
dbb7f45c0e7861cb64849d210ab6d75e500b070e

SHA256
836332934a026d44dcbd854be268c42cfd2168ffbe2b222ba51a68bc0b5fd5f8

SHA512
91913d91f1870978d775e09057c0480ad69b7163e5577cfb4b1b7296a5d929157f46281c7c1f2394c2e49ad5616d3088eebb28e37446d8320534164bbdeacdff

Download Submit
memory/452-17-0x0000000000EF0000-0x0000000000F05000-memory.dmp

Filesize
84KB

Download
memory/452-13-0x0000000000EF0000-0x0000000000F05000-memory.dmp

Filesize
84KB

Download
memory/452-20-0x0000000000EF0000-0x0000000000F05000-memory.dmp

Filesize
84KB

Download
memory/452-19-0x0000000000EF0000-0x0000000000F05000-memory.dmp

Filesize
84KB

Download
memory/452-18-0x0000000000EF0000-0x0000000000F05000-memory.dmp

Filesize
84KB

Download
memory/4808-1-0x0000000000DF0000-0x0000000000EF0000-memory.dmp

Filesize
1024KB

Download
memory/4808-4-0x0000000000400000-0x0000000000C14000-memory.dmp

Filesize
8.1MB

Download
memory/4808-8-0x0000000000CC0000-0x0000000000CD3000-memory.dmp

Filesize
76KB

Download
memory/4808-7-0x0000000000400000-0x0000000000C14000-memory.dmp

Filesize
8.1MB

Download
memory/4808-2-0x0000000000CC0000-0x0000000000CD3000-memory.dmp

Filesize
76KB

Download
memory/5084-11-0x0000000000400000-0x0000000000C14000-memory.dmp

Filesize
8.1MB

Download
memory/5084-12-0x0000000000400000-0x0000000000C14000-memory.dmp

Filesize
8.1MB

Download
memory/5084-10-0x0000000000F50000-0x0000000001050000-memory.dmp

Filesize
1024KB

Download
memory/5084-14-0x0000000000400000-0x0000000000C14000-memory.dmp

Filesize
8.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads