tofsee | 90f7ba38f8922c6e05435778aa40213f45027ed431f0e1214e063f867d4fb6b2

Analysis

max time kernel
146s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240319-en
resource tags

arch:x64arch:x86image:win10v2004-20240319-enlocale:en-usos:windows10-2004-x64system
submitted
04/04/2024, 12:28

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General

Target
b85d1cb9d251e779625ad09c04abdb34_JaffaCakes118.exe
Size 14.2MB
Sample240404-pnkeqsfb7y
SHA256 90f7ba38f8922c6e05435778aa40213f45027ed431f0e1214e063f867d4fb6b2
MD5 b85d1cb9d251e779625ad09c04abdb34
SHA1 d860b4d66d8cad6b80d6dcf6af823909456a5a51
SHA512 0bc092f561e79b90bdb4c294cf08c9b50abd4c5b8a86ea55b0ecf0f6262fd47e964e1e6665fad9c4df81dfa2360571fc9f258461e52499144511d012b01c9ca9
SSDEEP 12288:mwYgGUxJJykEkEkEkEkEkEkEkEkEkEkEkEkEkEkEkEkEkEkEkEkEkEkEkEkEkEkp:mAGU
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

defeatwax.ru
refabyd.info

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
3040	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\fdhhtwsy\ImagePath = "C:\\Windows\\SysWOW64\\fdhhtwsy\\ztcmzcht.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-1-5-21-817259280-2658881748-983986378-1000\Control Panel\International\Geo\Nation	b85d1cb9d251e779625ad09c04abdb34_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
2972	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1692	ztcmzcht.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1692 set thread context of 2972	1692	ztcmzcht.exe	119

Launches sc.exe 3 IoCs

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

pid	Process
464	sc.exe
4752	sc.exe
5036	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
4652	2000	WerFault.exe	93
4124	1692	WerFault.exe	113

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2000 wrote to memory of 2544	2000	b85d1cb9d251e779625ad09c04abdb34_JaffaCakes118.exe	100
PID 2000 wrote to memory of 2544	2000	b85d1cb9d251e779625ad09c04abdb34_JaffaCakes118.exe	100
PID 2000 wrote to memory of 2544	2000	b85d1cb9d251e779625ad09c04abdb34_JaffaCakes118.exe	100
PID 2000 wrote to memory of 4268	2000	b85d1cb9d251e779625ad09c04abdb34_JaffaCakes118.exe	104
PID 2000 wrote to memory of 4268	2000	b85d1cb9d251e779625ad09c04abdb34_JaffaCakes118.exe	104
PID 2000 wrote to memory of 4268	2000	b85d1cb9d251e779625ad09c04abdb34_JaffaCakes118.exe	104
PID 2000 wrote to memory of 464	2000	b85d1cb9d251e779625ad09c04abdb34_JaffaCakes118.exe	107
PID 2000 wrote to memory of 464	2000	b85d1cb9d251e779625ad09c04abdb34_JaffaCakes118.exe	107
PID 2000 wrote to memory of 464	2000	b85d1cb9d251e779625ad09c04abdb34_JaffaCakes118.exe	107
PID 2000 wrote to memory of 4752	2000	b85d1cb9d251e779625ad09c04abdb34_JaffaCakes118.exe	109
PID 2000 wrote to memory of 4752	2000	b85d1cb9d251e779625ad09c04abdb34_JaffaCakes118.exe	109
PID 2000 wrote to memory of 4752	2000	b85d1cb9d251e779625ad09c04abdb34_JaffaCakes118.exe	109
PID 2000 wrote to memory of 5036	2000	b85d1cb9d251e779625ad09c04abdb34_JaffaCakes118.exe	111
PID 2000 wrote to memory of 5036	2000	b85d1cb9d251e779625ad09c04abdb34_JaffaCakes118.exe	111
PID 2000 wrote to memory of 5036	2000	b85d1cb9d251e779625ad09c04abdb34_JaffaCakes118.exe	111
PID 2000 wrote to memory of 3040	2000	b85d1cb9d251e779625ad09c04abdb34_JaffaCakes118.exe	114
PID 2000 wrote to memory of 3040	2000	b85d1cb9d251e779625ad09c04abdb34_JaffaCakes118.exe	114
PID 2000 wrote to memory of 3040	2000	b85d1cb9d251e779625ad09c04abdb34_JaffaCakes118.exe	114
PID 1692 wrote to memory of 2972	1692	ztcmzcht.exe	119
PID 1692 wrote to memory of 2972	1692	ztcmzcht.exe	119
PID 1692 wrote to memory of 2972	1692	ztcmzcht.exe	119
PID 1692 wrote to memory of 2972	1692	ztcmzcht.exe	119
PID 1692 wrote to memory of 2972	1692	ztcmzcht.exe	119

C:\Users\Admin\AppData\Local\Temp\b85d1cb9d251e779625ad09c04abdb34_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\b85d1cb9d251e779625ad09c04abdb34_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2000
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\fdhhtwsy\
  2⤵
  PID:2544
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ztcmzcht.exe" C:\Windows\SysWOW64\fdhhtwsy\
  2⤵
  PID:4268
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create fdhhtwsy binPath= "C:\Windows\SysWOW64\fdhhtwsy\ztcmzcht.exe /d\"C:\Users\Admin\AppData\Local\Temp\b85d1cb9d251e779625ad09c04abdb34_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:464
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description fdhhtwsy "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:4752
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start fdhhtwsy
  2⤵
  - Launches sc.exe
  PID:5036
- 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:3040
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2000 -s 1176
  2⤵
  - Program crash
  PID:4652

C:\Windows\SysWOW64\fdhhtwsy\ztcmzcht.exe
C:\Windows\SysWOW64\fdhhtwsy\ztcmzcht.exe /d"C:\Users\Admin\AppData\Local\Temp\b85d1cb9d251e779625ad09c04abdb34_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1692
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:2972
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1692 -s 220
  2⤵
  - Program crash
  PID:4124

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 2000 -ip 2000
1⤵
PID:3904

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 488 -p 1692 -ip 1692
1⤵
PID:4420

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4084 --field-trial-handle=2276,i,5672504106535478802,17394903851940863593,262144 --variations-seed-version /prefetch:8
1⤵
PID:3408

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

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

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

ztcmzcht.exe

Path C:\Users\Admin\AppData\Local\Temp\ztcmzcht.exe
Size 11.6MB
SHA256 2cd294a8697c46058f755ca611ae2d2418bb79fe388cfcf58f8b6d8b1866ad23
MD5 7779f992773824eec0feccdfb3951d45
SHA1 22e027e6a3751789aaa478f4e4dc0b48454da3f0
SHA512 3b22fa3c67f5cba643f63d90a2d53c440301c6dba2850eaae0296fb95d721054fed56d7b67ed56c6ac5ef3b556ca043a38bc6f1fd997163953463c399d740342
SSDEEP 12288:hwYgGUxJJykEkEkEkEkEkEkEkEkEkEkEkEkEkEkEkEkEkEkEkEkEkEkEkEkEkEkH:hAGU
MD5 SHA1 SHA512 SSDEEP

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memory/1692-10-0x00000000004A0000-0x00000000005A0000-memory.dmp

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memory/1692-11-0x0000000000400000-0x0000000000446000-memory.dmp

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memory/1692-18-0x0000000000400000-0x0000000000446000-memory.dmp

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memory/2000-3-0x0000000000400000-0x0000000000446000-memory.dmp

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memory/2000-1-0x00000000005A0000-0x00000000006A0000-memory.dmp

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memory/2000-8-0x0000000000400000-0x0000000000446000-memory.dmp

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memory/2000-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

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memory/2000-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

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memory/2972-12-0x0000000000360000-0x0000000000375000-memory.dmp

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memory/2972-15-0x0000000000360000-0x0000000000375000-memory.dmp

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memory/2972-16-0x0000000000360000-0x0000000000375000-memory.dmp

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memory/2972-17-0x0000000000360000-0x0000000000375000-memory.dmp

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memory/2972-19-0x0000000000360000-0x0000000000375000-memory.dmp

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Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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