tofsee | 42ebc1e3ce246575703ca88ab049be62f7a729ac743f5f9e6a45e68d04fec38a

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
21/04/2024, 04:34

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General

Target
fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe
Size 12.2MB
Sample240421-e64k8abe81
SHA256 42ebc1e3ce246575703ca88ab049be62f7a729ac743f5f9e6a45e68d04fec38a
MD5 fe71a5cc8c5564f2e1b9e4e63eb48fc5
SHA1 ae2f00b7bc2fb6cbfae3622b6031c5bb411e0bc5
SHA512 fda1dcb122f442540741567cd4b4c8b452648742df2701494c88c6a296d878a900b7dc65831f4497fe95acf48567b71d1248e23aabc6bc45aef3614fc075a3c4
SSDEEP 393216:Muuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu:
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
1316	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\bxlyhnao\ImagePath = "C:\\Windows\\SysWOW64\\bxlyhnao\\tfmglrem.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-1-5-21-2288054676-1871194608-3559553667-1000\Control Panel\International\Geo\Nation	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
3876	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3664	tfmglrem.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3664 set thread context of 3876	3664	tfmglrem.exe	111

Launches sc.exe 3 IoCs

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

pid	Process
3452	sc.exe
1828	sc.exe
4080	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
2940	2212	WerFault.exe	83
4364	3664	WerFault.exe	102

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2212 wrote to memory of 2468	2212	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	88
PID 2212 wrote to memory of 2468	2212	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	88
PID 2212 wrote to memory of 2468	2212	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	88
PID 2212 wrote to memory of 3516	2212	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	91
PID 2212 wrote to memory of 3516	2212	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	91
PID 2212 wrote to memory of 3516	2212	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	91
PID 2212 wrote to memory of 3452	2212	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	93
PID 2212 wrote to memory of 3452	2212	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	93
PID 2212 wrote to memory of 3452	2212	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	93
PID 2212 wrote to memory of 1828	2212	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	96
PID 2212 wrote to memory of 1828	2212	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	96
PID 2212 wrote to memory of 1828	2212	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	96
PID 2212 wrote to memory of 4080	2212	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	100
PID 2212 wrote to memory of 4080	2212	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	100
PID 2212 wrote to memory of 4080	2212	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	100
PID 2212 wrote to memory of 1316	2212	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	103
PID 2212 wrote to memory of 1316	2212	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	103
PID 2212 wrote to memory of 1316	2212	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	103
PID 3664 wrote to memory of 3876	3664	tfmglrem.exe	111
PID 3664 wrote to memory of 3876	3664	tfmglrem.exe	111
PID 3664 wrote to memory of 3876	3664	tfmglrem.exe	111
PID 3664 wrote to memory of 3876	3664	tfmglrem.exe	111
PID 3664 wrote to memory of 3876	3664	tfmglrem.exe	111

C:\Users\Admin\AppData\Local\Temp\fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2212
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bxlyhnao\
  2⤵
  PID:2468
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\tfmglrem.exe" C:\Windows\SysWOW64\bxlyhnao\
  2⤵
  PID:3516
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create bxlyhnao binPath= "C:\Windows\SysWOW64\bxlyhnao\tfmglrem.exe /d\"C:\Users\Admin\AppData\Local\Temp\fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:3452
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description bxlyhnao "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:1828
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start bxlyhnao
  2⤵
  - Launches sc.exe
  PID:4080
- 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:1316
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2212 -s 664
  2⤵
  - Program crash
  PID:2940

C:\Windows\SysWOW64\bxlyhnao\tfmglrem.exe
C:\Windows\SysWOW64\bxlyhnao\tfmglrem.exe /d"C:\Users\Admin\AppData\Local\Temp\fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3664
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:3876
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3664 -s 516
  2⤵
  - Program crash
  PID:4364

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 2212 -ip 2212
1⤵
PID:4488

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 3664 -ip 3664
1⤵
PID:4108

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

tfmglrem.exe

Path C:\Users\Admin\AppData\Local\Temp\tfmglrem.exe
Size 10.2MB
SHA256 e9cfb7fa271592a9716eeb65d700e634d31ff59ae326e4149efb14fde5f2873d
MD5 38f2f48f86b100ac5a375a71214b88c3
SHA1 3799ef5f720f86b827b7bf283146a4336bd296af
SHA512 bded6a825c6befb3067b9f8f58355d0e8943ead2f99b1cc0d689cf92cc9efb736f7c292ec09cd13f7d1aa0ba4f44ab5fc7e61dbd69df3b7a6b21355ce01db31c
SSDEEP 196608:AuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuL:AuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuL
MD5 SHA1 SHA512 SSDEEP

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memory/2212-1-0x0000000002D90000-0x0000000002E90000-memory.dmp

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memory/2212-2-0x00000000048C0000-0x00000000048D3000-memory.dmp

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memory/2212-4-0x0000000000400000-0x0000000002CB9000-memory.dmp

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memory/2212-8-0x0000000000400000-0x0000000002CB9000-memory.dmp

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memory/2212-9-0x00000000048C0000-0x00000000048D3000-memory.dmp

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memory/3664-10-0x0000000002DD0000-0x0000000002ED0000-memory.dmp

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memory/3664-13-0x0000000000400000-0x0000000002CB9000-memory.dmp

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memory/3664-18-0x0000000000400000-0x0000000002CB9000-memory.dmp

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memory/3876-11-0x0000000000800000-0x0000000000815000-memory.dmp

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memory/3876-16-0x0000000000800000-0x0000000000815000-memory.dmp

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memory/3876-17-0x0000000000800000-0x0000000000815000-memory.dmp

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memory/3876-19-0x0000000000800000-0x0000000000815000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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