tofsee | 202c56cd60883f77bd154c3c45240a558edfe75f8480646e301256383f067b1f

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
15/04/2024, 22:49

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General

Target
f21b1d37cc4a41eb2dfde780fa798b93_JaffaCakes118.exe
Size 11.0MB
Sample240415-2rxwfscd81
SHA256 202c56cd60883f77bd154c3c45240a558edfe75f8480646e301256383f067b1f
MD5 f21b1d37cc4a41eb2dfde780fa798b93
SHA1 0c72b83f361d3e80e02cc0865f418f6c0ce2b364
SHA512 c4d1c452b8192385023271d5c9085cb0ede9f00a754fbf9caad3a8fc06da66ff6d47ffdfb1bf2a69e176211d83ef8c05ec18df54fbd8d3cae287700a0579cdaa
SSDEEP 6144:dJuJ6WaImz/SmCBZ0DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDz:vubnW/Sm
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

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
716	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\tnwlfxjs\ImagePath = "C:\\Windows\\SysWOW64\\tnwlfxjs\\cxxeamcu.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	f21b1d37cc4a41eb2dfde780fa798b93_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
2296	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4648	cxxeamcu.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4648 set thread context of 2296	4648	cxxeamcu.exe	103

Launches sc.exe 3 IoCs

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

pid	Process
388	sc.exe
1572	sc.exe
4412	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 4020 wrote to memory of 4520	4020	f21b1d37cc4a41eb2dfde780fa798b93_JaffaCakes118.exe	86
PID 4020 wrote to memory of 4520	4020	f21b1d37cc4a41eb2dfde780fa798b93_JaffaCakes118.exe	86
PID 4020 wrote to memory of 4520	4020	f21b1d37cc4a41eb2dfde780fa798b93_JaffaCakes118.exe	86
PID 4020 wrote to memory of 3496	4020	f21b1d37cc4a41eb2dfde780fa798b93_JaffaCakes118.exe	91
PID 4020 wrote to memory of 3496	4020	f21b1d37cc4a41eb2dfde780fa798b93_JaffaCakes118.exe	91
PID 4020 wrote to memory of 3496	4020	f21b1d37cc4a41eb2dfde780fa798b93_JaffaCakes118.exe	91
PID 4020 wrote to memory of 4412	4020	f21b1d37cc4a41eb2dfde780fa798b93_JaffaCakes118.exe	93
PID 4020 wrote to memory of 4412	4020	f21b1d37cc4a41eb2dfde780fa798b93_JaffaCakes118.exe	93
PID 4020 wrote to memory of 4412	4020	f21b1d37cc4a41eb2dfde780fa798b93_JaffaCakes118.exe	93
PID 4020 wrote to memory of 388	4020	f21b1d37cc4a41eb2dfde780fa798b93_JaffaCakes118.exe	96
PID 4020 wrote to memory of 388	4020	f21b1d37cc4a41eb2dfde780fa798b93_JaffaCakes118.exe	96
PID 4020 wrote to memory of 388	4020	f21b1d37cc4a41eb2dfde780fa798b93_JaffaCakes118.exe	96
PID 4020 wrote to memory of 1572	4020	f21b1d37cc4a41eb2dfde780fa798b93_JaffaCakes118.exe	100
PID 4020 wrote to memory of 1572	4020	f21b1d37cc4a41eb2dfde780fa798b93_JaffaCakes118.exe	100
PID 4020 wrote to memory of 1572	4020	f21b1d37cc4a41eb2dfde780fa798b93_JaffaCakes118.exe	100
PID 4648 wrote to memory of 2296	4648	cxxeamcu.exe	103
PID 4648 wrote to memory of 2296	4648	cxxeamcu.exe	103
PID 4648 wrote to memory of 2296	4648	cxxeamcu.exe	103
PID 4648 wrote to memory of 2296	4648	cxxeamcu.exe	103
PID 4648 wrote to memory of 2296	4648	cxxeamcu.exe	103
PID 4020 wrote to memory of 716	4020	f21b1d37cc4a41eb2dfde780fa798b93_JaffaCakes118.exe	104
PID 4020 wrote to memory of 716	4020	f21b1d37cc4a41eb2dfde780fa798b93_JaffaCakes118.exe	104
PID 4020 wrote to memory of 716	4020	f21b1d37cc4a41eb2dfde780fa798b93_JaffaCakes118.exe	104

C:\Users\Admin\AppData\Local\Temp\f21b1d37cc4a41eb2dfde780fa798b93_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f21b1d37cc4a41eb2dfde780fa798b93_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4020
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\tnwlfxjs\
  2⤵
  PID:4520
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cxxeamcu.exe" C:\Windows\SysWOW64\tnwlfxjs\
  2⤵
  PID:3496
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create tnwlfxjs binPath= "C:\Windows\SysWOW64\tnwlfxjs\cxxeamcu.exe /d\"C:\Users\Admin\AppData\Local\Temp\f21b1d37cc4a41eb2dfde780fa798b93_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:4412
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description tnwlfxjs "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:388
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start tnwlfxjs
  2⤵
  - Launches sc.exe
  PID:1572
- 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:716

C:\Windows\SysWOW64\tnwlfxjs\cxxeamcu.exe
C:\Windows\SysWOW64\tnwlfxjs\cxxeamcu.exe /d"C:\Users\Admin\AppData\Local\Temp\f21b1d37cc4a41eb2dfde780fa798b93_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4648
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:2296

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

cxxeamcu.exe

Path C:\Users\Admin\AppData\Local\Temp\cxxeamcu.exe
Size 10.1MB
SHA256 7f351b4793446d09281d3ec562f070833680cb47a4a6a55c52cc806bb6bac9c9
MD5 2137349fa32b78d750526423066f5d4e
SHA1 9a9702328885d3a49220439a9d7e9bf974972d73
SHA512 62e817b765efe64d89cf83f096542d149336ff98b792134ec8b34d79c241e84a8249d23190b8ade8ece29be39403f33487813802c975d27617c19df03928de99
SSDEEP 6144:HJuJ6WaImz/SmCBZ0DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDj:pubnW/Sm
MD5 SHA1 SHA512 SSDEEP

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memory/2296-8-0x0000000000CD0000-0x0000000000CE5000-memory.dmp

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memory/2296-12-0x0000000000CD0000-0x0000000000CE5000-memory.dmp

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memory/2296-14-0x0000000000CD0000-0x0000000000CE5000-memory.dmp

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memory/2296-15-0x0000000000CD0000-0x0000000000CE5000-memory.dmp

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memory/2296-16-0x0000000000CD0000-0x0000000000CE5000-memory.dmp

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memory/4020-0-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/4020-1-0x00000000009C0000-0x00000000009C1000-memory.dmp

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memory/4020-2-0x00000000009D0000-0x00000000009D1000-memory.dmp

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memory/4020-13-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/4648-6-0x0000000000460000-0x0000000000461000-memory.dmp

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memory/4648-11-0x0000000000400000-0x000000000041F000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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