tofsee | 10c0e1e2f3655cfcec5152956f55317f97f354eebeb6b92faadd32cf536ce3e7

General

Target

d5c42c0b4c034d6298c7565c450295a9.exe
Size

13.3MB
MD5

d5c42c0b4c034d6298c7565c450295a9
SHA1

62daa0659d317e740cc7c28f3d2737f71827939d
SHA256

10c0e1e2f3655cfcec5152956f55317f97f354eebeb6b92faadd32cf536ce3e7
SHA512

63e6f30d031afd20be58aac790a9b93ec062d566faebd71825264095b3443ea4af1db2b5744c296ac6cda81ec4f41d3ce41d512a64cfdb4bdda42c224414203b
SSDEEP

49152:Lj55555555555555555555555555555555555555555555555555555555555559:

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

Windows Service
T1543.003

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
928	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\sadxlaig\ImagePath = "C:\\Windows\\SysWOW64\\sadxlaig\\fwpszmyx.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-1-5-21-566096764-1992588923-1249862864-1000\Control Panel\International\Geo\Nation	d5c42c0b4c034d6298c7565c450295a9.exe

Deletes itself 1 IoCs

pid	Process
3020	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4644	fwpszmyx.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4644 set thread context of 3020	4644	fwpszmyx.exe	102

Launches sc.exe 3 IoCs

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

pid	Process
2408	sc.exe
3128	sc.exe
1104	sc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 436 wrote to memory of 3568	436	d5c42c0b4c034d6298c7565c450295a9.exe	91
PID 436 wrote to memory of 3568	436	d5c42c0b4c034d6298c7565c450295a9.exe	91
PID 436 wrote to memory of 3568	436	d5c42c0b4c034d6298c7565c450295a9.exe	91
PID 436 wrote to memory of 4916	436	d5c42c0b4c034d6298c7565c450295a9.exe	93
PID 436 wrote to memory of 4916	436	d5c42c0b4c034d6298c7565c450295a9.exe	93
PID 436 wrote to memory of 4916	436	d5c42c0b4c034d6298c7565c450295a9.exe	93
PID 436 wrote to memory of 2408	436	d5c42c0b4c034d6298c7565c450295a9.exe	95
PID 436 wrote to memory of 2408	436	d5c42c0b4c034d6298c7565c450295a9.exe	95
PID 436 wrote to memory of 2408	436	d5c42c0b4c034d6298c7565c450295a9.exe	95
PID 436 wrote to memory of 3128	436	d5c42c0b4c034d6298c7565c450295a9.exe	97
PID 436 wrote to memory of 3128	436	d5c42c0b4c034d6298c7565c450295a9.exe	97
PID 436 wrote to memory of 3128	436	d5c42c0b4c034d6298c7565c450295a9.exe	97
PID 436 wrote to memory of 1104	436	d5c42c0b4c034d6298c7565c450295a9.exe	99
PID 436 wrote to memory of 1104	436	d5c42c0b4c034d6298c7565c450295a9.exe	99
PID 436 wrote to memory of 1104	436	d5c42c0b4c034d6298c7565c450295a9.exe	99
PID 4644 wrote to memory of 3020	4644	fwpszmyx.exe	102
PID 4644 wrote to memory of 3020	4644	fwpszmyx.exe	102
PID 4644 wrote to memory of 3020	4644	fwpszmyx.exe	102
PID 4644 wrote to memory of 3020	4644	fwpszmyx.exe	102
PID 4644 wrote to memory of 3020	4644	fwpszmyx.exe	102
PID 436 wrote to memory of 928	436	d5c42c0b4c034d6298c7565c450295a9.exe	103
PID 436 wrote to memory of 928	436	d5c42c0b4c034d6298c7565c450295a9.exe	103
PID 436 wrote to memory of 928	436	d5c42c0b4c034d6298c7565c450295a9.exe	103

C:\Users\Admin\AppData\Local\Temp\d5c42c0b4c034d6298c7565c450295a9.exe
"C:\Users\Admin\AppData\Local\Temp\d5c42c0b4c034d6298c7565c450295a9.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:436
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\sadxlaig\
  2⤵
  PID:3568
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\fwpszmyx.exe" C:\Windows\SysWOW64\sadxlaig\
  2⤵
  PID:4916
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create sadxlaig binPath= "C:\Windows\SysWOW64\sadxlaig\fwpszmyx.exe /d\"C:\Users\Admin\AppData\Local\Temp\d5c42c0b4c034d6298c7565c450295a9.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2408
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description sadxlaig "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:3128
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start sadxlaig
  2⤵
  - Launches sc.exe
  PID:1104
- 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:928

C:\Windows\SysWOW64\sadxlaig\fwpszmyx.exe
C:\Windows\SysWOW64\sadxlaig\fwpszmyx.exe /d"C:\Users\Admin\AppData\Local\Temp\d5c42c0b4c034d6298c7565c450295a9.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4644
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:3020

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

Impair Defenses

1

T1562

Disable or Modify System Firewall

Modify Registry

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\fwpszmyx.exe

Filesize
57KB

MD5
125bcd029aafe38af3b577015dd8bd04

SHA1
0f206b0e94b163723a1e03871a167d7b45438679

SHA256
3787dbaf9275a9d5b5574992c0120672e945e4322977ed246fd50e2d9d99e66a

SHA512
cfe8db6d7be9c1488ed212a995dc0c720e801952232db6c81a299c1bccd3e26a4982b251b64b73ce27432d1a79abfd0339c8969f550f26159cfca981dfcab9aa

Download Submit
C:\Windows\SysWOW64\sadxlaig\fwpszmyx.exe

Filesize
265KB

MD5
a59a45cfad2d17324b25111447a3d499

SHA1
7565952ac3db3d01d15627180f1db74c2a4d6e44

SHA256
35b326939ad068165a25d31af7deda434e603aa40f143282cf59c8b29442df8c

SHA512
31c92c7036ea4a1563554c6308bea36238dd595bb760223f5f4d8c2fac1ce0287096e039d20566edb90369c904cbf0b1b10ccbdbf53b9597a2c52ef45f6a9ec7

Download Submit
memory/436-1-0x00000000005B0000-0x00000000005B1000-memory.dmp

Filesize
4KB

Download
memory/436-0-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/436-2-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/436-3-0x00000000005C0000-0x00000000005C1000-memory.dmp

Filesize
4KB

Download
memory/436-15-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/3020-14-0x0000000000600000-0x0000000000615000-memory.dmp

Filesize
84KB

Download
memory/3020-10-0x0000000000600000-0x0000000000615000-memory.dmp

Filesize
84KB

Download
memory/3020-17-0x0000000000600000-0x0000000000615000-memory.dmp

Filesize
84KB

Download
memory/3020-16-0x0000000000600000-0x0000000000615000-memory.dmp

Filesize
84KB

Download
memory/3020-18-0x0000000000600000-0x0000000000615000-memory.dmp

Filesize
84KB

Download
memory/4644-7-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/4644-8-0x0000000000590000-0x0000000000591000-memory.dmp

Filesize
4KB

Download
memory/4644-12-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads