tofsee | c4edf15d1762c66cdd4fc361fc423ce59fe23b5bea8609f611bd0c0518f5f39c

Analysis

max time kernel
158s
max time network
172s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
07/01/2024, 19:20

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General

Target
a1221c43754f0bf8adfe72560dabb5e2.exe
Size 10.2MB
Sample240107-x2caaacceq
SHA256 c4edf15d1762c66cdd4fc361fc423ce59fe23b5bea8609f611bd0c0518f5f39c
MD5 a1221c43754f0bf8adfe72560dabb5e2
SHA1 d28d5ffec4c801eddf253cd8f6bc22909dee244e
SHA512 8b0c60f1f5a028d5accdd48b88993d1581d785f1c035e81d0dee6420a6fb840883decdf6ff28b5c5a6d6c16b048b3fffad402844774ce9a338185b2682c60109
SSDEEP 49152:8vVGWdbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbP:8vV
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
4416	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\zizhabjm\ImagePath = "C:\\Windows\\SysWOW64\\zizhabjm\\jnuesfnd.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-1-5-21-983843758-932321429-1636175382-1000\Control Panel\International\Geo\Nation	a1221c43754f0bf8adfe72560dabb5e2.exe

Deletes itself 1 IoCs

pid	Process
4144	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3236	jnuesfnd.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3236 set thread context of 4144	3236	jnuesfnd.exe	115

Launches sc.exe 3 IoCs

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

pid	Process
1904	sc.exe
3960	sc.exe
3396	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
4672	3796	WerFault.exe	88
4604	3236	WerFault.exe	106

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3796 wrote to memory of 2088	3796	a1221c43754f0bf8adfe72560dabb5e2.exe	95
PID 3796 wrote to memory of 2088	3796	a1221c43754f0bf8adfe72560dabb5e2.exe	95
PID 3796 wrote to memory of 2088	3796	a1221c43754f0bf8adfe72560dabb5e2.exe	95
PID 3796 wrote to memory of 540	3796	a1221c43754f0bf8adfe72560dabb5e2.exe	98
PID 3796 wrote to memory of 540	3796	a1221c43754f0bf8adfe72560dabb5e2.exe	98
PID 3796 wrote to memory of 540	3796	a1221c43754f0bf8adfe72560dabb5e2.exe	98
PID 3796 wrote to memory of 1904	3796	a1221c43754f0bf8adfe72560dabb5e2.exe	100
PID 3796 wrote to memory of 1904	3796	a1221c43754f0bf8adfe72560dabb5e2.exe	100
PID 3796 wrote to memory of 1904	3796	a1221c43754f0bf8adfe72560dabb5e2.exe	100
PID 3796 wrote to memory of 3960	3796	a1221c43754f0bf8adfe72560dabb5e2.exe	101
PID 3796 wrote to memory of 3960	3796	a1221c43754f0bf8adfe72560dabb5e2.exe	101
PID 3796 wrote to memory of 3960	3796	a1221c43754f0bf8adfe72560dabb5e2.exe	101
PID 3796 wrote to memory of 3396	3796	a1221c43754f0bf8adfe72560dabb5e2.exe	105
PID 3796 wrote to memory of 3396	3796	a1221c43754f0bf8adfe72560dabb5e2.exe	105
PID 3796 wrote to memory of 3396	3796	a1221c43754f0bf8adfe72560dabb5e2.exe	105
PID 3796 wrote to memory of 4416	3796	a1221c43754f0bf8adfe72560dabb5e2.exe	109
PID 3796 wrote to memory of 4416	3796	a1221c43754f0bf8adfe72560dabb5e2.exe	109
PID 3796 wrote to memory of 4416	3796	a1221c43754f0bf8adfe72560dabb5e2.exe	109
PID 3236 wrote to memory of 4144	3236	jnuesfnd.exe	115
PID 3236 wrote to memory of 4144	3236	jnuesfnd.exe	115
PID 3236 wrote to memory of 4144	3236	jnuesfnd.exe	115
PID 3236 wrote to memory of 4144	3236	jnuesfnd.exe	115
PID 3236 wrote to memory of 4144	3236	jnuesfnd.exe	115

C:\Users\Admin\AppData\Local\Temp\a1221c43754f0bf8adfe72560dabb5e2.exe
"C:\Users\Admin\AppData\Local\Temp\a1221c43754f0bf8adfe72560dabb5e2.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3796
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zizhabjm\
  2⤵
  PID:2088
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jnuesfnd.exe" C:\Windows\SysWOW64\zizhabjm\
  2⤵
  PID:540
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create zizhabjm binPath= "C:\Windows\SysWOW64\zizhabjm\jnuesfnd.exe /d\"C:\Users\Admin\AppData\Local\Temp\a1221c43754f0bf8adfe72560dabb5e2.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:1904
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description zizhabjm "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:3960
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start zizhabjm
  2⤵
  - Launches sc.exe
  PID:3396
- 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:4416
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3796 -s 1156
  2⤵
  - Program crash
  PID:4672

C:\Windows\SysWOW64\zizhabjm\jnuesfnd.exe
C:\Windows\SysWOW64\zizhabjm\jnuesfnd.exe /d"C:\Users\Admin\AppData\Local\Temp\a1221c43754f0bf8adfe72560dabb5e2.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3236
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:4144
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3236 -s 512
  2⤵
  - Program crash
  PID:4604

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 3796 -ip 3796
1⤵
PID:3520

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 3236 -ip 3236
1⤵
PID:376

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

jnuesfnd.exe

Path C:\Users\Admin\AppData\Local\Temp\jnuesfnd.exe
Size 1.5MB
SHA256 fb948ef5f98b1bc2d918c304b5239112d05463469b837a9939d8ede3cc782f4f
MD5 fecc4e9436d9c5b3b4a0d93ed1253a8c
SHA1 b55e7bb44cec08479f89b359d5a9c337cadb3427
SHA512 8d278e1d527565deabc94bc7f9be6a7b36cd3a7f1eacb3302d95a7eff7f659f3f8084fc82194d32c898bb573c0dd2d10b4bcaa2c9a8cdec9f4edebc9098d0ce8
SSDEEP 49152:3vVGWdbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb:3vV
MD5 SHA1 SHA512 SSDEEP

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jnuesfnd.exe

Path C:\Windows\SysWOW64\zizhabjm\jnuesfnd.exe
Size 217KB
SHA256 999eb3c207ababc5d71cf7c726adf7ecd6ffeff98f98a9687c42684120848692
MD5 2785c4e847e54a0c04442c60d65e110e
SHA1 fc92411daa3417697e3eeb5bad517376946ca114
SHA512 1d4d7826f0d3f3bdc6b9077385a81d56c45a4e6c080fc09aa49e64495819d7dd0ced1050fbd6a0badef319943782b1c892984f5dfe71068c0695102972d39d14
SSDEEP 6144:MMqSVdSkyQJlrYnYlbDnN3yYBduky6CzqZRGKDa:3dvS9QJbl3nI6EmGqLZa
MD5 SHA1 SHA512 SSDEEP

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memory/3236-17-0x0000000000400000-0x0000000000C17000-memory.dmp

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memory/3236-13-0x0000000000400000-0x0000000000C17000-memory.dmp

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memory/3236-10-0x0000000000EE0000-0x0000000000FE0000-memory.dmp

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memory/3796-4-0x0000000000400000-0x0000000000C17000-memory.dmp

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memory/3796-2-0x0000000002820000-0x0000000002833000-memory.dmp

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memory/3796-7-0x0000000000400000-0x0000000000C17000-memory.dmp

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memory/3796-8-0x0000000002820000-0x0000000002833000-memory.dmp

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memory/3796-1-0x0000000000CA0000-0x0000000000DA0000-memory.dmp

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memory/4144-15-0x0000000001000000-0x0000000001015000-memory.dmp

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memory/4144-18-0x0000000001000000-0x0000000001015000-memory.dmp

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memory/4144-16-0x0000000001000000-0x0000000001015000-memory.dmp

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memory/4144-11-0x0000000001000000-0x0000000001015000-memory.dmp

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memory/4144-19-0x0000000001000000-0x0000000001015000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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