tofsee | 7f8cb81aabb63a3bb8806b9c055582bec59ef104362316dc164dd686128b9246

Analysis

max time kernel
142s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
07/05/2024, 14:55

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General

Target
20de026bf4998364c894a00f7a97df60_JaffaCakes118.exe
Size 99KB
Sample240507-saya8aee77
SHA256 7f8cb81aabb63a3bb8806b9c055582bec59ef104362316dc164dd686128b9246
MD5 20de026bf4998364c894a00f7a97df60
SHA1 9db4857e4894082aa77c5f5b82009f2028f8fc51
SHA512 10894d234217ba24391d5de14e40908cfb13ae367e943b34fafad9c6bd5caa937501f1db04ee43127171d40d7d185fa09cf3de8f765b89aa706272ee6c0596dc
SSDEEP 1536:R33ZAoU8Ed7fzXfQFlj8+6a+Vpvy/eKaO/VChHWNvw0+pDi8P19Exk:hZ3EZf6A+6a+Vpvy/ead22KHDDPEa
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion execution 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) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
4524	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\tckcfyph\ImagePath = "C:\\Windows\\SysWOW64\\tckcfyph\\oikhbxhm.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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	20de026bf4998364c894a00f7a97df60_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
2400	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
400	oikhbxhm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 400 set thread context of 2400	400	oikhbxhm.exe	104

Launches sc.exe 3 IoCs

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

pid	Process
3596	sc.exe
3740	sc.exe
3328	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 3672 wrote to memory of 4488	3672	20de026bf4998364c894a00f7a97df60_JaffaCakes118.exe	91
PID 3672 wrote to memory of 4488	3672	20de026bf4998364c894a00f7a97df60_JaffaCakes118.exe	91
PID 3672 wrote to memory of 4488	3672	20de026bf4998364c894a00f7a97df60_JaffaCakes118.exe	91
PID 3672 wrote to memory of 4188	3672	20de026bf4998364c894a00f7a97df60_JaffaCakes118.exe	93
PID 3672 wrote to memory of 4188	3672	20de026bf4998364c894a00f7a97df60_JaffaCakes118.exe	93
PID 3672 wrote to memory of 4188	3672	20de026bf4998364c894a00f7a97df60_JaffaCakes118.exe	93
PID 3672 wrote to memory of 3596	3672	20de026bf4998364c894a00f7a97df60_JaffaCakes118.exe	95
PID 3672 wrote to memory of 3596	3672	20de026bf4998364c894a00f7a97df60_JaffaCakes118.exe	95
PID 3672 wrote to memory of 3596	3672	20de026bf4998364c894a00f7a97df60_JaffaCakes118.exe	95
PID 3672 wrote to memory of 3740	3672	20de026bf4998364c894a00f7a97df60_JaffaCakes118.exe	97
PID 3672 wrote to memory of 3740	3672	20de026bf4998364c894a00f7a97df60_JaffaCakes118.exe	97
PID 3672 wrote to memory of 3740	3672	20de026bf4998364c894a00f7a97df60_JaffaCakes118.exe	97
PID 3672 wrote to memory of 3328	3672	20de026bf4998364c894a00f7a97df60_JaffaCakes118.exe	99
PID 3672 wrote to memory of 3328	3672	20de026bf4998364c894a00f7a97df60_JaffaCakes118.exe	99
PID 3672 wrote to memory of 3328	3672	20de026bf4998364c894a00f7a97df60_JaffaCakes118.exe	99
PID 3672 wrote to memory of 4524	3672	20de026bf4998364c894a00f7a97df60_JaffaCakes118.exe	101
PID 3672 wrote to memory of 4524	3672	20de026bf4998364c894a00f7a97df60_JaffaCakes118.exe	101
PID 3672 wrote to memory of 4524	3672	20de026bf4998364c894a00f7a97df60_JaffaCakes118.exe	101
PID 400 wrote to memory of 2400	400	oikhbxhm.exe	104
PID 400 wrote to memory of 2400	400	oikhbxhm.exe	104
PID 400 wrote to memory of 2400	400	oikhbxhm.exe	104
PID 400 wrote to memory of 2400	400	oikhbxhm.exe	104
PID 400 wrote to memory of 2400	400	oikhbxhm.exe	104

C:\Users\Admin\AppData\Local\Temp\20de026bf4998364c894a00f7a97df60_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\20de026bf4998364c894a00f7a97df60_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3672
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\tckcfyph\
  2⤵
  PID:4488
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\oikhbxhm.exe" C:\Windows\SysWOW64\tckcfyph\
  2⤵
  PID:4188
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create tckcfyph binPath= "C:\Windows\SysWOW64\tckcfyph\oikhbxhm.exe /d\"C:\Users\Admin\AppData\Local\Temp\20de026bf4998364c894a00f7a97df60_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:3596
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description tckcfyph "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:3740
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start tckcfyph
  2⤵
  - Launches sc.exe
  PID:3328
- 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:4524

C:\Windows\SysWOW64\tckcfyph\oikhbxhm.exe
C:\Windows\SysWOW64\tckcfyph\oikhbxhm.exe /d"C:\Users\Admin\AppData\Local\Temp\20de026bf4998364c894a00f7a97df60_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:400
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:2400

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=4160 --field-trial-handle=3084,i,4016110471176367543,14287608422419064331,262144 --variations-seed-version /prefetch:8
1⤵
PID:2180

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

T1569

Service Execution

T1569.002

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

oikhbxhm.exe

Path C:\Users\Admin\AppData\Local\Temp\oikhbxhm.exe
Size 12.6MB
SHA256 cfca296ad672d08018a05bab61e28e155549a9e513e2876eddb3207c5e3ccf6e
MD5 b8d5a6092bd7805b2675e79e19f7ace3
SHA1 645316b40bf484703a4db664f8c2a5a9b6deab87
SHA512 17e163b0b7984bf478823ebac6b42b4f0b07818fe589eb0bd3608c1e0a357af1e9eafedee6313e927b3f900b7366c661110721fd6b0e002f4e4ecd3d1830156d
SSDEEP 3072:mZ3EZf6A+6a+Vpvy/ead22KHDDPEaQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQU:MUZyA+67yFdnKHDDPE
MD5 SHA1 SHA512 SSDEEP

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memory/400-8-0x0000000000400000-0x000000000041C000-memory.dmp

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memory/400-7-0x0000000000920000-0x0000000000921000-memory.dmp

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memory/400-10-0x0000000000400000-0x000000000041C000-memory.dmp

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memory/2400-9-0x0000000000790000-0x00000000007A5000-memory.dmp

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memory/2400-12-0x0000000000790000-0x00000000007A5000-memory.dmp

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memory/2400-13-0x0000000000790000-0x00000000007A5000-memory.dmp

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memory/3672-0-0x0000000000B20000-0x0000000000B21000-memory.dmp

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memory/3672-1-0x0000000000400000-0x000000000041C000-memory.dmp

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memory/3672-2-0x0000000000450000-0x0000000000451000-memory.dmp

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memory/3672-5-0x0000000000400000-0x000000000041C000-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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