tofsee | ca90cb41af3bd78fcfd594aa6e92ba713bc8f39928f577036f97b62b9f2a8be3

Analysis

max time kernel
93s
max time network
97s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
29/09/2024, 12:45

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General

Target
fe8e61ef43583c2d6a67c49f626c657c_JaffaCakes118.exe
Size 205KB
Sample240929-py2rrsyamf
SHA256 ca90cb41af3bd78fcfd594aa6e92ba713bc8f39928f577036f97b62b9f2a8be3
MD5 fe8e61ef43583c2d6a67c49f626c657c
SHA1 0f067362b6285e4858250c606c4d1587e4e41e72
SHA512 6b8139d7c51c057c886d68e06998a0899756d81fb3cf9288c36accd1146c05213f7715b8e34ac9be2bb78f652ef67cd1282a7c57bbdbcaf39fa608038618eae1
SSDEEP 6144:JMmdbOsHCU8TCOXlUS9f6mLTjr5/FUv0A+YpYA9OTZIu:OISsHCU8T5f9imLndyv0A16Tv
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee discovery persistence trojan

Malware Config

Extracted

Family

tofsee

94.75.255.140
rgtryhbgddtyh.biz
wertdghbyrukl.ch

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee

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-1-5-21-945322488-2060912225-3527527000-1000\Control Panel\International\Geo\Nation	fe8e61ef43583c2d6a67c49f626c657c_JaffaCakes118.exe

Executes dropped EXE 2 IoCs

pid	Process
2912	oyssbax.exe
468	oyssbax.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-945322488-2060912225-3527527000-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MSConfig = "\"C:\\Users\\Admin\\oyssbax.exe\" /r"	fe8e61ef43583c2d6a67c49f626c657c_JaffaCakes118.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4304 set thread context of 5032	4304	fe8e61ef43583c2d6a67c49f626c657c_JaffaCakes118.exe	82
PID 2912 set thread context of 468	2912	oyssbax.exe	84
PID 468 set thread context of 3096	468	oyssbax.exe	85

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
640	3096	WerFault.exe	85

System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fe8e61ef43583c2d6a67c49f626c657c_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fe8e61ef43583c2d6a67c49f626c657c_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	oyssbax.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	oyssbax.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 4304 wrote to memory of 5032	4304	fe8e61ef43583c2d6a67c49f626c657c_JaffaCakes118.exe	82
PID 4304 wrote to memory of 5032	4304	fe8e61ef43583c2d6a67c49f626c657c_JaffaCakes118.exe	82
PID 4304 wrote to memory of 5032	4304	fe8e61ef43583c2d6a67c49f626c657c_JaffaCakes118.exe	82
PID 4304 wrote to memory of 5032	4304	fe8e61ef43583c2d6a67c49f626c657c_JaffaCakes118.exe	82
PID 4304 wrote to memory of 5032	4304	fe8e61ef43583c2d6a67c49f626c657c_JaffaCakes118.exe	82
PID 4304 wrote to memory of 5032	4304	fe8e61ef43583c2d6a67c49f626c657c_JaffaCakes118.exe	82
PID 4304 wrote to memory of 5032	4304	fe8e61ef43583c2d6a67c49f626c657c_JaffaCakes118.exe	82
PID 4304 wrote to memory of 5032	4304	fe8e61ef43583c2d6a67c49f626c657c_JaffaCakes118.exe	82
PID 5032 wrote to memory of 2912	5032	fe8e61ef43583c2d6a67c49f626c657c_JaffaCakes118.exe	83
PID 5032 wrote to memory of 2912	5032	fe8e61ef43583c2d6a67c49f626c657c_JaffaCakes118.exe	83
PID 5032 wrote to memory of 2912	5032	fe8e61ef43583c2d6a67c49f626c657c_JaffaCakes118.exe	83
PID 2912 wrote to memory of 468	2912	oyssbax.exe	84
PID 2912 wrote to memory of 468	2912	oyssbax.exe	84
PID 2912 wrote to memory of 468	2912	oyssbax.exe	84
PID 2912 wrote to memory of 468	2912	oyssbax.exe	84
PID 2912 wrote to memory of 468	2912	oyssbax.exe	84
PID 2912 wrote to memory of 468	2912	oyssbax.exe	84
PID 2912 wrote to memory of 468	2912	oyssbax.exe	84
PID 2912 wrote to memory of 468	2912	oyssbax.exe	84
PID 468 wrote to memory of 3096	468	oyssbax.exe	85
PID 468 wrote to memory of 3096	468	oyssbax.exe	85
PID 468 wrote to memory of 3096	468	oyssbax.exe	85
PID 468 wrote to memory of 3096	468	oyssbax.exe	85
PID 468 wrote to memory of 3096	468	oyssbax.exe	85
PID 5032 wrote to memory of 3508	5032	fe8e61ef43583c2d6a67c49f626c657c_JaffaCakes118.exe	89
PID 5032 wrote to memory of 3508	5032	fe8e61ef43583c2d6a67c49f626c657c_JaffaCakes118.exe	89
PID 5032 wrote to memory of 3508	5032	fe8e61ef43583c2d6a67c49f626c657c_JaffaCakes118.exe	89

C:\Users\Admin\AppData\Local\Temp\fe8e61ef43583c2d6a67c49f626c657c_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\fe8e61ef43583c2d6a67c49f626c657c_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4304
- C:\Users\Admin\AppData\Local\Temp\fe8e61ef43583c2d6a67c49f626c657c_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\fe8e61ef43583c2d6a67c49f626c657c_JaffaCakes118.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5032
- - C:\Users\Admin\oyssbax.exe
    "C:\Users\Admin\oyssbax.exe" /r
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2912
  - - C:\Users\Admin\oyssbax.exe
      "C:\Users\Admin\oyssbax.exe" /r
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:468
    - - C:\Windows\SysWOW64\svchost.exe
        
        svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:3096
      - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3096 -s 320
        6⤵
        Program crash
        
        PID:640
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\1726.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3508

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3096 -ip 3096
1⤵
PID:4544

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

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

1726.bat

Path C:\Users\Admin\AppData\Local\Temp\1726.bat
Size 117B
SHA256 e6b5a94f7aa7a037a520ee8022951b82084ad6de79a54cd2abfd4bbf61c47dfb
MD5 e314b01cc421e267c0805d1136bddd36
SHA1 802252dc01db55c376a018e8b3d2be91f60c3cd2
SHA512 24290d19bf06b68d4d491aebe7df5497f38ee7d6f841ddb8b98b27a7bd2e37dd38ff73758bce998058d889b50a1636bbaf596c31008d58773ab3f61d82e127c1
MD5 SHA1 SHA512

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oyssbax.exe

Path C:\Users\Admin\oyssbax.exe
Size 205KB
SHA256 ca90cb41af3bd78fcfd594aa6e92ba713bc8f39928f577036f97b62b9f2a8be3
MD5 fe8e61ef43583c2d6a67c49f626c657c
SHA1 0f067362b6285e4858250c606c4d1587e4e41e72
SHA512 6b8139d7c51c057c886d68e06998a0899756d81fb3cf9288c36accd1146c05213f7715b8e34ac9be2bb78f652ef67cd1282a7c57bbdbcaf39fa608038618eae1
SSDEEP 6144:JMmdbOsHCU8TCOXlUS9f6mLTjr5/FUv0A+YpYA9OTZIu:OISsHCU8T5f9imLndyv0A16Tv
MD5 SHA1 SHA512 SSDEEP

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memory/468-12-0x0000000000400000-0x0000000000410000-memory.dmp

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memory/3096-13-0x0000000000DF0000-0x0000000000E00000-memory.dmp

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memory/3096-18-0x0000000000DF0000-0x0000000000E00000-memory.dmp

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memory/3096-27-0x0000000000FA0000-0x0000000000FA1000-memory.dmp

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memory/3096-26-0x0000000000DF0000-0x0000000000E00000-memory.dmp

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memory/3096-28-0x0000000000DF0000-0x0000000000E00000-memory.dmp

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memory/3096-29-0x0000000000DF0000-0x0000000000E00000-memory.dmp

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memory/5032-0-0x0000000000400000-0x0000000000410000-memory.dmp

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memory/5032-2-0x0000000000400000-0x0000000000410000-memory.dmp

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memory/5032-23-0x0000000000400000-0x0000000000410000-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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