tofsee | f470b1f3e1c06b2aa8c39ccc759a0959835df0686080ae76ec0e22935fb23d82

Analysis

max time kernel
148s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
16/04/2024, 12:15

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General

Target
f379c76200860aa2a6e11bf220772b5f_JaffaCakes118.exe
Size 14.9MB
Sample240416-pe8e7saa85
SHA256 f470b1f3e1c06b2aa8c39ccc759a0959835df0686080ae76ec0e22935fb23d82
MD5 f379c76200860aa2a6e11bf220772b5f
SHA1 8b53b7f4efe9339a9463cdf61ed64f7091d5b006
SHA512 77e33eb0197478919086e60976c4716683d67f2415c8d03d27a59b8ac8dad7e31d1cba7a985f673b60619d8790481d3fbc2b5a716d258a5714ad5ed7ed9bdff6
SSDEEP 49152:M66666666666666666666666666666666666666666666666666666666666666i:
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 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
1304	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\vpvlnfns\ImagePath = "C:\\Windows\\SysWOW64\\vpvlnfns\\asguihxr.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-1-5-21-1826666146-2574340311-1877551059-1000\Control Panel\International\Geo\Nation	f379c76200860aa2a6e11bf220772b5f_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
3552	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2376	asguihxr.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2376 set thread context of 3552	2376	asguihxr.exe	104

Launches sc.exe 3 IoCs

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

pid	Process
2944	sc.exe
4948	sc.exe
4872	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
1860	756	WerFault.exe	84
3856	2376	WerFault.exe	99

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 756 wrote to memory of 5028	756	f379c76200860aa2a6e11bf220772b5f_JaffaCakes118.exe	89
PID 756 wrote to memory of 5028	756	f379c76200860aa2a6e11bf220772b5f_JaffaCakes118.exe	89
PID 756 wrote to memory of 5028	756	f379c76200860aa2a6e11bf220772b5f_JaffaCakes118.exe	89
PID 756 wrote to memory of 1652	756	f379c76200860aa2a6e11bf220772b5f_JaffaCakes118.exe	91
PID 756 wrote to memory of 1652	756	f379c76200860aa2a6e11bf220772b5f_JaffaCakes118.exe	91
PID 756 wrote to memory of 1652	756	f379c76200860aa2a6e11bf220772b5f_JaffaCakes118.exe	91
PID 756 wrote to memory of 2944	756	f379c76200860aa2a6e11bf220772b5f_JaffaCakes118.exe	93
PID 756 wrote to memory of 2944	756	f379c76200860aa2a6e11bf220772b5f_JaffaCakes118.exe	93
PID 756 wrote to memory of 2944	756	f379c76200860aa2a6e11bf220772b5f_JaffaCakes118.exe	93
PID 756 wrote to memory of 4948	756	f379c76200860aa2a6e11bf220772b5f_JaffaCakes118.exe	95
PID 756 wrote to memory of 4948	756	f379c76200860aa2a6e11bf220772b5f_JaffaCakes118.exe	95
PID 756 wrote to memory of 4948	756	f379c76200860aa2a6e11bf220772b5f_JaffaCakes118.exe	95
PID 756 wrote to memory of 4872	756	f379c76200860aa2a6e11bf220772b5f_JaffaCakes118.exe	97
PID 756 wrote to memory of 4872	756	f379c76200860aa2a6e11bf220772b5f_JaffaCakes118.exe	97
PID 756 wrote to memory of 4872	756	f379c76200860aa2a6e11bf220772b5f_JaffaCakes118.exe	97
PID 756 wrote to memory of 1304	756	f379c76200860aa2a6e11bf220772b5f_JaffaCakes118.exe	100
PID 756 wrote to memory of 1304	756	f379c76200860aa2a6e11bf220772b5f_JaffaCakes118.exe	100
PID 756 wrote to memory of 1304	756	f379c76200860aa2a6e11bf220772b5f_JaffaCakes118.exe	100
PID 2376 wrote to memory of 3552	2376	asguihxr.exe	104
PID 2376 wrote to memory of 3552	2376	asguihxr.exe	104
PID 2376 wrote to memory of 3552	2376	asguihxr.exe	104
PID 2376 wrote to memory of 3552	2376	asguihxr.exe	104
PID 2376 wrote to memory of 3552	2376	asguihxr.exe	104

C:\Users\Admin\AppData\Local\Temp\f379c76200860aa2a6e11bf220772b5f_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f379c76200860aa2a6e11bf220772b5f_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:756
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vpvlnfns\
  2⤵
  PID:5028
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\asguihxr.exe" C:\Windows\SysWOW64\vpvlnfns\
  2⤵
  PID:1652
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create vpvlnfns binPath= "C:\Windows\SysWOW64\vpvlnfns\asguihxr.exe /d\"C:\Users\Admin\AppData\Local\Temp\f379c76200860aa2a6e11bf220772b5f_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2944
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description vpvlnfns "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:4948
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start vpvlnfns
  2⤵
  - Launches sc.exe
  PID:4872
- 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:1304
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 756 -s 1300
  2⤵
  - Program crash
  PID:1860

C:\Windows\SysWOW64\vpvlnfns\asguihxr.exe
C:\Windows\SysWOW64\vpvlnfns\asguihxr.exe /d"C:\Users\Admin\AppData\Local\Temp\f379c76200860aa2a6e11bf220772b5f_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2376
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:3552
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2376 -s 532
  2⤵
  - Program crash
  PID:3856

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 756 -ip 756
1⤵
PID:1052

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 2376 -ip 2376
1⤵
PID:5008

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

asguihxr.exe

Path C:\Users\Admin\AppData\Local\Temp\asguihxr.exe
Size 13.1MB
SHA256 421a6c2ac6e0413554592c030c4bbf1b4ab1277197f04c1f6810d96ac8ec20aa
MD5 63a73a888d93cc06a5a27514212c71d9
SHA1 a3960ef62c67e5a7c5915b8381626fb1b252c47d
SHA512 17c5bcb79d4f8b88cbe8a624c0bddd24dbebc54e7467521636d18ccb4ad94d05f0ab0c88846326773266310ac25408c226916409256cdd36eab2274bed73fc6d
SSDEEP 49152:j66666666666666666666666666666666666666666666666666666666666666f:
MD5 SHA1 SHA512 SSDEEP

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memory/756-1-0x0000000000E40000-0x0000000000F40000-memory.dmp

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memory/756-2-0x0000000000DB0000-0x0000000000DC3000-memory.dmp

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memory/756-4-0x0000000000400000-0x0000000000C0A000-memory.dmp

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memory/756-7-0x0000000000400000-0x0000000000C0A000-memory.dmp

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memory/756-8-0x0000000000DB0000-0x0000000000DC3000-memory.dmp

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memory/2376-10-0x0000000000FF0000-0x00000000010F0000-memory.dmp

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memory/2376-14-0x0000000000400000-0x0000000000C0A000-memory.dmp

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memory/3552-11-0x0000000000990000-0x00000000009A5000-memory.dmp

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memory/3552-15-0x0000000000990000-0x00000000009A5000-memory.dmp

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memory/3552-16-0x0000000000990000-0x00000000009A5000-memory.dmp

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memory/3552-17-0x0000000000990000-0x00000000009A5000-memory.dmp

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memory/3552-19-0x0000000000990000-0x00000000009A5000-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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