tofsee | c9bb0f5190af364135375275be990f63233814ea6fab7ddaa4b2d21895945077

General

Target
82ea87954b04fc372f6d7742c9a8c1ba_JaffaCakes118.exe
Size 142KB
Sample240530-d5hrpaea22
SHA256 c9bb0f5190af364135375275be990f63233814ea6fab7ddaa4b2d21895945077
MD5 82ea87954b04fc372f6d7742c9a8c1ba
SHA1 3a5a3225a254b8439f4b47547cee90693fe54d71
SHA512 98b62922cdd6fc243a4d1fe7ad2da5d71f11f8d6b92193d093dadd8cce9a240dbd5eae3b07c432c6b2ab5ff549946bc89d1bb8f025b1f409df74bcdd00f673c3
SSDEEP 3072:kO8/FLfgT6rzTkYfiL2+jKfgi4m5nuGFU6W6WNE6b3U:w9NzwFLnKP46uC
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion execution persistence trojan

Malware Config

Extracted

Family

tofsee

C2

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
3520	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\evlnqhtw\ImagePath = "C:\\Windows\\SysWOW64\\evlnqhtw\\bxtfujqo.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	82ea87954b04fc372f6d7742c9a8c1ba_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
1564	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
5016	bxtfujqo.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5016 set thread context of 1564	5016	bxtfujqo.exe	106

Launches sc.exe 3 IoCs

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

pid	Process
4464	sc.exe
1920	sc.exe
3740	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 1108 wrote to memory of 2628	1108	82ea87954b04fc372f6d7742c9a8c1ba_JaffaCakes118.exe	91
PID 1108 wrote to memory of 2628	1108	82ea87954b04fc372f6d7742c9a8c1ba_JaffaCakes118.exe	91
PID 1108 wrote to memory of 2628	1108	82ea87954b04fc372f6d7742c9a8c1ba_JaffaCakes118.exe	91
PID 1108 wrote to memory of 1892	1108	82ea87954b04fc372f6d7742c9a8c1ba_JaffaCakes118.exe	93
PID 1108 wrote to memory of 1892	1108	82ea87954b04fc372f6d7742c9a8c1ba_JaffaCakes118.exe	93
PID 1108 wrote to memory of 1892	1108	82ea87954b04fc372f6d7742c9a8c1ba_JaffaCakes118.exe	93
PID 1108 wrote to memory of 3740	1108	82ea87954b04fc372f6d7742c9a8c1ba_JaffaCakes118.exe	95
PID 1108 wrote to memory of 3740	1108	82ea87954b04fc372f6d7742c9a8c1ba_JaffaCakes118.exe	95
PID 1108 wrote to memory of 3740	1108	82ea87954b04fc372f6d7742c9a8c1ba_JaffaCakes118.exe	95
PID 1108 wrote to memory of 4464	1108	82ea87954b04fc372f6d7742c9a8c1ba_JaffaCakes118.exe	97
PID 1108 wrote to memory of 4464	1108	82ea87954b04fc372f6d7742c9a8c1ba_JaffaCakes118.exe	97
PID 1108 wrote to memory of 4464	1108	82ea87954b04fc372f6d7742c9a8c1ba_JaffaCakes118.exe	97
PID 1108 wrote to memory of 1920	1108	82ea87954b04fc372f6d7742c9a8c1ba_JaffaCakes118.exe	99
PID 1108 wrote to memory of 1920	1108	82ea87954b04fc372f6d7742c9a8c1ba_JaffaCakes118.exe	99
PID 1108 wrote to memory of 1920	1108	82ea87954b04fc372f6d7742c9a8c1ba_JaffaCakes118.exe	99
PID 1108 wrote to memory of 3520	1108	82ea87954b04fc372f6d7742c9a8c1ba_JaffaCakes118.exe	101
PID 1108 wrote to memory of 3520	1108	82ea87954b04fc372f6d7742c9a8c1ba_JaffaCakes118.exe	101
PID 1108 wrote to memory of 3520	1108	82ea87954b04fc372f6d7742c9a8c1ba_JaffaCakes118.exe	101
PID 5016 wrote to memory of 1564	5016	bxtfujqo.exe	106
PID 5016 wrote to memory of 1564	5016	bxtfujqo.exe	106
PID 5016 wrote to memory of 1564	5016	bxtfujqo.exe	106
PID 5016 wrote to memory of 1564	5016	bxtfujqo.exe	106
PID 5016 wrote to memory of 1564	5016	bxtfujqo.exe	106

C:\Users\Admin\AppData\Local\Temp\82ea87954b04fc372f6d7742c9a8c1ba_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\82ea87954b04fc372f6d7742c9a8c1ba_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1108
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\evlnqhtw\
  2⤵
  PID:2628
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bxtfujqo.exe" C:\Windows\SysWOW64\evlnqhtw\
  2⤵
  PID:1892
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create evlnqhtw binPath= "C:\Windows\SysWOW64\evlnqhtw\bxtfujqo.exe /d\"C:\Users\Admin\AppData\Local\Temp\82ea87954b04fc372f6d7742c9a8c1ba_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:3740
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description evlnqhtw "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:4464
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start evlnqhtw
  2⤵
  - Launches sc.exe
  PID:1920
- 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:3520

C:\Windows\SysWOW64\evlnqhtw\bxtfujqo.exe
C:\Windows\SysWOW64\evlnqhtw\bxtfujqo.exe /d"C:\Users\Admin\AppData\Local\Temp\82ea87954b04fc372f6d7742c9a8c1ba_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5016
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:1564

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=3904 --field-trial-handle=3084,i,4016110471176367543,14287608422419064331,262144 --variations-seed-version /prefetch:8
1⤵
PID:4432

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1

T1569

Service Execution

1

T1569.002

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Defense Evasion

Impair Defenses

1

T1562

Disable or Modify System Firewall

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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bxtfujqo.exe

Path C:\Users\Admin\AppData\Local\Temp\bxtfujqo.exe
Size 14.4MB
SHA256 0891972855b40fc66e0f10a6dd0fada77b2470c176b25ee506236922fc45731e
MD5 8bca56c8492c9173348c117a9a600bf7
SHA1 5354e6e8bc19e13dd4f54d46b2f75f3937faf741
SHA512 24e45187d606c106d97616260d895391dca69b48a35b09828baf86baff8d29216737923e69d9d00d4744534df75e1141a43fd1a85e25e6ad626d21ff39570d9d
SSDEEP 3072:PO8/FLfgT6rzTkYfiL2+jKfgi4m5nuGFU6W6WNE6b3UIIIIIIIIIIIIIIIIIIII:N9NzwFLnKP46uC
MD5 SHA1 SHA512 SSDEEP

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memory/1108-0-0x0000000000B60000-0x0000000000B61000-memory.dmp

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memory/1108-1-0x0000000000400000-0x0000000000426000-memory.dmp

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memory/1108-2-0x00000000024D0000-0x00000000024D1000-memory.dmp

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memory/1108-5-0x0000000000400000-0x0000000000426000-memory.dmp

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memory/1564-8-0x00000000009B0000-0x00000000009C5000-memory.dmp

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memory/1564-11-0x00000000009B0000-0x00000000009C5000-memory.dmp

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memory/1564-12-0x00000000009B0000-0x00000000009C5000-memory.dmp

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memory/5016-7-0x0000000000400000-0x0000000000426000-memory.dmp

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memory/5016-9-0x0000000000400000-0x0000000000426000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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