tofsee | b0aa46638aafaa212deedaba1c016aabddb40a92969ab53d49b83528307f057e

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
04/04/2024, 00:50

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General

Target
ab38d06bf7e5f592f98b2fa16aa0bd5a_JaffaCakes118.exe
Size 10.3MB
Sample240404-a7ax3sab67
SHA256 b0aa46638aafaa212deedaba1c016aabddb40a92969ab53d49b83528307f057e
MD5 ab38d06bf7e5f592f98b2fa16aa0bd5a
SHA1 e7e88dfb61fbf258a82f23805e9879a3efa70d4b
SHA512 a52e6aa3846052e76ebd06f69dd9924d12c603824f290fbfb853895f2eba394069bdf3335ad9df2aeb7bd283c6c62f5df759091ae596df5a8a619a5622f07b84
SSDEEP 49152:1Ighhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh:a
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
3364	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\hshdxrua\ImagePath = "C:\\Windows\\SysWOW64\\hshdxrua\\nzgaflyg.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-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation	ab38d06bf7e5f592f98b2fa16aa0bd5a_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
4488	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1376	nzgaflyg.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1376 set thread context of 4488	1376	nzgaflyg.exe	115

Launches sc.exe 3 IoCs

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

pid	Process
4100	sc.exe
2636	sc.exe
4044	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
2972	3164	WerFault.exe	91
2740	1376	WerFault.exe	108

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3164 wrote to memory of 3868	3164	ab38d06bf7e5f592f98b2fa16aa0bd5a_JaffaCakes118.exe	96
PID 3164 wrote to memory of 3868	3164	ab38d06bf7e5f592f98b2fa16aa0bd5a_JaffaCakes118.exe	96
PID 3164 wrote to memory of 3868	3164	ab38d06bf7e5f592f98b2fa16aa0bd5a_JaffaCakes118.exe	96
PID 3164 wrote to memory of 2712	3164	ab38d06bf7e5f592f98b2fa16aa0bd5a_JaffaCakes118.exe	98
PID 3164 wrote to memory of 2712	3164	ab38d06bf7e5f592f98b2fa16aa0bd5a_JaffaCakes118.exe	98
PID 3164 wrote to memory of 2712	3164	ab38d06bf7e5f592f98b2fa16aa0bd5a_JaffaCakes118.exe	98
PID 3164 wrote to memory of 4100	3164	ab38d06bf7e5f592f98b2fa16aa0bd5a_JaffaCakes118.exe	101
PID 3164 wrote to memory of 4100	3164	ab38d06bf7e5f592f98b2fa16aa0bd5a_JaffaCakes118.exe	101
PID 3164 wrote to memory of 4100	3164	ab38d06bf7e5f592f98b2fa16aa0bd5a_JaffaCakes118.exe	101
PID 3164 wrote to memory of 2636	3164	ab38d06bf7e5f592f98b2fa16aa0bd5a_JaffaCakes118.exe	104
PID 3164 wrote to memory of 2636	3164	ab38d06bf7e5f592f98b2fa16aa0bd5a_JaffaCakes118.exe	104
PID 3164 wrote to memory of 2636	3164	ab38d06bf7e5f592f98b2fa16aa0bd5a_JaffaCakes118.exe	104
PID 3164 wrote to memory of 4044	3164	ab38d06bf7e5f592f98b2fa16aa0bd5a_JaffaCakes118.exe	106
PID 3164 wrote to memory of 4044	3164	ab38d06bf7e5f592f98b2fa16aa0bd5a_JaffaCakes118.exe	106
PID 3164 wrote to memory of 4044	3164	ab38d06bf7e5f592f98b2fa16aa0bd5a_JaffaCakes118.exe	106
PID 3164 wrote to memory of 3364	3164	ab38d06bf7e5f592f98b2fa16aa0bd5a_JaffaCakes118.exe	109
PID 3164 wrote to memory of 3364	3164	ab38d06bf7e5f592f98b2fa16aa0bd5a_JaffaCakes118.exe	109
PID 3164 wrote to memory of 3364	3164	ab38d06bf7e5f592f98b2fa16aa0bd5a_JaffaCakes118.exe	109
PID 1376 wrote to memory of 4488	1376	nzgaflyg.exe	115
PID 1376 wrote to memory of 4488	1376	nzgaflyg.exe	115
PID 1376 wrote to memory of 4488	1376	nzgaflyg.exe	115
PID 1376 wrote to memory of 4488	1376	nzgaflyg.exe	115
PID 1376 wrote to memory of 4488	1376	nzgaflyg.exe	115

C:\Users\Admin\AppData\Local\Temp\ab38d06bf7e5f592f98b2fa16aa0bd5a_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\ab38d06bf7e5f592f98b2fa16aa0bd5a_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3164
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hshdxrua\
  2⤵
  PID:3868
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nzgaflyg.exe" C:\Windows\SysWOW64\hshdxrua\
  2⤵
  PID:2712
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create hshdxrua binPath= "C:\Windows\SysWOW64\hshdxrua\nzgaflyg.exe /d\"C:\Users\Admin\AppData\Local\Temp\ab38d06bf7e5f592f98b2fa16aa0bd5a_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:4100
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description hshdxrua "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2636
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start hshdxrua
  2⤵
  - Launches sc.exe
  PID:4044
- 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:3364
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3164 -s 1160
  2⤵
  - Program crash
  PID:2972

C:\Windows\SysWOW64\hshdxrua\nzgaflyg.exe
C:\Windows\SysWOW64\hshdxrua\nzgaflyg.exe /d"C:\Users\Admin\AppData\Local\Temp\ab38d06bf7e5f592f98b2fa16aa0bd5a_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1376
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:4488
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1376 -s 516
  2⤵
  - Program crash
  PID:2740

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 3164 -ip 3164
1⤵
PID:1040

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 1376 -ip 1376
1⤵
PID:3340

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=1408 --field-trial-handle=2260,i,9938964625802268469,1928462186077019554,262144 --variations-seed-version /prefetch:8
1⤵
PID:1908

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

nzgaflyg.exe

Path C:\Users\Admin\AppData\Local\Temp\nzgaflyg.exe
Size 11.2MB
SHA256 0367fcbc83dcbc976429b4d83bce8889efc193a3970cf65f6a3820c0e4e04df3
MD5 8978cebf3a719dadbf9ead52f9cb425f
SHA1 7db16ef5172ef94c1be2bc2be2aecee8ee13a23d
SHA512 8e6c2f94d5f9036dbdb90e2f29de67a7fd458cb1b9ce19b1736c46e32c1f58e10b7b4e697f538931a5aa20ac2de0028de4a36b39193b594b408522cf8455132b
SSDEEP 49152:HIghhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhn:o
MD5 SHA1 SHA512 SSDEEP

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memory/1376-12-0x0000000000400000-0x000000000086B000-memory.dmp

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memory/1376-10-0x0000000000870000-0x0000000000970000-memory.dmp

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memory/1376-18-0x0000000000400000-0x000000000086B000-memory.dmp

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memory/3164-4-0x0000000000400000-0x000000000086B000-memory.dmp

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memory/3164-2-0x0000000000E10000-0x0000000000E23000-memory.dmp

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memory/3164-8-0x0000000000400000-0x000000000086B000-memory.dmp

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memory/3164-9-0x0000000000E10000-0x0000000000E23000-memory.dmp

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memory/3164-1-0x0000000000B10000-0x0000000000C10000-memory.dmp

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memory/4488-11-0x00000000009E0000-0x00000000009F5000-memory.dmp

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memory/4488-16-0x00000000009E0000-0x00000000009F5000-memory.dmp

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memory/4488-17-0x00000000009E0000-0x00000000009F5000-memory.dmp

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memory/4488-19-0x00000000009E0000-0x00000000009F5000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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