tofsee | 208e0b6bb172c3f887f68a363b034af17815dd53d0ead4ffeee84b653a4e11bd

Analysis

max time kernel
166s
max time network
179s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
30/12/2023, 10:21

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General

Target
15babf8e0289bbd390f95b8d03187c35.exe
Size 11.1MB
Sample231230-mdl5gagder
SHA256 208e0b6bb172c3f887f68a363b034af17815dd53d0ead4ffeee84b653a4e11bd
MD5 15babf8e0289bbd390f95b8d03187c35
SHA1 4cf4f245677949cef516eb64db0b55da273cf32f
SHA512 9ab9b7c79f21c8b32f926a6d7f1c9d579032669b20440a4a4f4fd44a17598436ef2dc3da73f3809a9fc55cd543e7f629580c4ab9441dbf87ff5ba35b7de4583d
SSDEEP 24576:Xj8tdiKEvdYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYv:7Kg
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

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
4556	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\uafmois\ImagePath = "C:\\Windows\\SysWOW64\\uafmois\\nryiwjrh.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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	15babf8e0289bbd390f95b8d03187c35.exe

Deletes itself 1 IoCs

pid	Process
4360	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2936	nryiwjrh.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2936 set thread context of 4360	2936	nryiwjrh.exe	112

Launches sc.exe 3 IoCs

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

pid	Process
2200	sc.exe
2632	sc.exe
672	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
3708	3340	WerFault.exe	90
1016	2936	WerFault.exe	110

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3340 wrote to memory of 4848	3340	15babf8e0289bbd390f95b8d03187c35.exe	96
PID 3340 wrote to memory of 4848	3340	15babf8e0289bbd390f95b8d03187c35.exe	96
PID 3340 wrote to memory of 4848	3340	15babf8e0289bbd390f95b8d03187c35.exe	96
PID 3340 wrote to memory of 4880	3340	15babf8e0289bbd390f95b8d03187c35.exe	97
PID 3340 wrote to memory of 4880	3340	15babf8e0289bbd390f95b8d03187c35.exe	97
PID 3340 wrote to memory of 4880	3340	15babf8e0289bbd390f95b8d03187c35.exe	97
PID 3340 wrote to memory of 2200	3340	15babf8e0289bbd390f95b8d03187c35.exe	101
PID 3340 wrote to memory of 2200	3340	15babf8e0289bbd390f95b8d03187c35.exe	101
PID 3340 wrote to memory of 2200	3340	15babf8e0289bbd390f95b8d03187c35.exe	101
PID 3340 wrote to memory of 2632	3340	15babf8e0289bbd390f95b8d03187c35.exe	102
PID 3340 wrote to memory of 2632	3340	15babf8e0289bbd390f95b8d03187c35.exe	102
PID 3340 wrote to memory of 2632	3340	15babf8e0289bbd390f95b8d03187c35.exe	102
PID 3340 wrote to memory of 672	3340	15babf8e0289bbd390f95b8d03187c35.exe	104
PID 3340 wrote to memory of 672	3340	15babf8e0289bbd390f95b8d03187c35.exe	104
PID 3340 wrote to memory of 672	3340	15babf8e0289bbd390f95b8d03187c35.exe	104
PID 3340 wrote to memory of 4556	3340	15babf8e0289bbd390f95b8d03187c35.exe	106
PID 3340 wrote to memory of 4556	3340	15babf8e0289bbd390f95b8d03187c35.exe	106
PID 3340 wrote to memory of 4556	3340	15babf8e0289bbd390f95b8d03187c35.exe	106
PID 2936 wrote to memory of 4360	2936	nryiwjrh.exe	112
PID 2936 wrote to memory of 4360	2936	nryiwjrh.exe	112
PID 2936 wrote to memory of 4360	2936	nryiwjrh.exe	112
PID 2936 wrote to memory of 4360	2936	nryiwjrh.exe	112
PID 2936 wrote to memory of 4360	2936	nryiwjrh.exe	112

C:\Users\Admin\AppData\Local\Temp\15babf8e0289bbd390f95b8d03187c35.exe
"C:\Users\Admin\AppData\Local\Temp\15babf8e0289bbd390f95b8d03187c35.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3340
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\uafmois\
  2⤵
  PID:4848
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nryiwjrh.exe" C:\Windows\SysWOW64\uafmois\
  2⤵
  PID:4880
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create uafmois binPath= "C:\Windows\SysWOW64\uafmois\nryiwjrh.exe /d\"C:\Users\Admin\AppData\Local\Temp\15babf8e0289bbd390f95b8d03187c35.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2200
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description uafmois "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2632
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start uafmois
  2⤵
  - Launches sc.exe
  PID:672
- 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:4556
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3340 -s 1036
  2⤵
  - Program crash
  PID:3708

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 196 -p 3340 -ip 3340
1⤵
PID:1860

C:\Windows\SysWOW64\uafmois\nryiwjrh.exe
C:\Windows\SysWOW64\uafmois\nryiwjrh.exe /d"C:\Users\Admin\AppData\Local\Temp\15babf8e0289bbd390f95b8d03187c35.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2936
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:4360
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2936 -s 512
  2⤵
  - Program crash
  PID:1016

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2936 -ip 2936
1⤵
PID:4692

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

nryiwjrh.exe

Path C:\Users\Admin\AppData\Local\Temp\nryiwjrh.exe
Size 14.0MB
SHA256 964482a94e4808bd2885d3ca10bbeab1e4802204c4eb5fee7d9ce34c22f826fd
MD5 47a15519d7a7c753b045f3c94122bcfa
SHA1 b69401df850f301a363507d1678169108434279d
SHA512 f0780d3763b0b0362a6a0ee1821cd92f72ce242288e9b608b2e2b18d9db065b3023b16a25a17c1aa08bdebe72a8b9636d45762c03beb678b862dd57a0ff797c3
SSDEEP 24576:Hj8tdiKEvdYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYP:rKg
MD5 SHA1 SHA512 SSDEEP

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memory/2936-20-0x0000000000400000-0x00000000008E9000-memory.dmp

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memory/2936-15-0x0000000000400000-0x00000000008E9000-memory.dmp

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memory/2936-14-0x0000000000B70000-0x0000000000C70000-memory.dmp

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memory/3340-12-0x0000000000400000-0x00000000008E9000-memory.dmp

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memory/3340-7-0x0000000000970000-0x0000000000A70000-memory.dmp

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memory/3340-9-0x0000000000AB0000-0x0000000000AC3000-memory.dmp

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memory/3340-6-0x0000000000400000-0x00000000008E9000-memory.dmp

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memory/3340-1-0x0000000000970000-0x0000000000A70000-memory.dmp

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memory/3340-4-0x0000000000400000-0x00000000008E9000-memory.dmp

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memory/3340-3-0x0000000000400000-0x00000000008E9000-memory.dmp

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memory/3340-2-0x0000000000AB0000-0x0000000000AC3000-memory.dmp

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memory/4360-16-0x0000000001200000-0x0000000001215000-memory.dmp

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memory/4360-19-0x0000000001200000-0x0000000001215000-memory.dmp

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memory/4360-22-0x0000000001200000-0x0000000001215000-memory.dmp

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memory/4360-23-0x0000000001200000-0x0000000001215000-memory.dmp

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memory/4360-24-0x0000000001200000-0x0000000001215000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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