tofsee | e210917fb03f075f4aa2f5dc7dbe64f824a5763842ac6548f65f15a56fb89981

Analysis

max time kernel
135s
max time network
126s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
24/07/2024, 10:57

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General

Target
6b5a672444d08d6ee9edd139ff45875d_JaffaCakes118.exe
Size 209KB
Sample240724-m2hryssgnm
SHA256 e210917fb03f075f4aa2f5dc7dbe64f824a5763842ac6548f65f15a56fb89981
MD5 6b5a672444d08d6ee9edd139ff45875d
SHA1 fb525eb026fabbb12ba66cad34c977f258da2121
SHA512 ff6ce1ed00b543c4609ace2cb242393dedb2f6e5298ee95d02941740a38ecdefac3571ad244062ca3fc7c44b36edd366efb5a9d90e8ef69e2b2e645b7a37fbe0
SSDEEP 3072:/wlkxQRyFl7Rx1LAQRqgU6LFDRqyN2cNMNugf2kt/KyBR0p58A7uBEACzGxDKZ72:4lkOYFdRb0Q4gvLFXffgrBQ7uBEAXSg
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-1-5-21-1750093773-264148664-1320403265-1000\Control Panel\International\Geo\Nation	6b5a672444d08d6ee9edd139ff45875d_JaffaCakes118.exe

Executes dropped EXE 2 IoCs

pid	Process
2928	kcnnwoa.exe
1572	kcnnwoa.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-1-5-21-1750093773-264148664-1320403265-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MSConfig = "\"C:\\Users\\Admin\\kcnnwoa.exe\" /r"	6b5a672444d08d6ee9edd139ff45875d_JaffaCakes118.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2932 set thread context of 3512	2932	6b5a672444d08d6ee9edd139ff45875d_JaffaCakes118.exe	84
PID 2928 set thread context of 1572	2928	kcnnwoa.exe	86
PID 1572 set thread context of 4600	1572	kcnnwoa.exe	87

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
3908	4600	WerFault.exe	87

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	kcnnwoa.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	kcnnwoa.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	6b5a672444d08d6ee9edd139ff45875d_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	6b5a672444d08d6ee9edd139ff45875d_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 2932 wrote to memory of 3512	2932	6b5a672444d08d6ee9edd139ff45875d_JaffaCakes118.exe	84
PID 2932 wrote to memory of 3512	2932	6b5a672444d08d6ee9edd139ff45875d_JaffaCakes118.exe	84
PID 2932 wrote to memory of 3512	2932	6b5a672444d08d6ee9edd139ff45875d_JaffaCakes118.exe	84
PID 2932 wrote to memory of 3512	2932	6b5a672444d08d6ee9edd139ff45875d_JaffaCakes118.exe	84
PID 2932 wrote to memory of 3512	2932	6b5a672444d08d6ee9edd139ff45875d_JaffaCakes118.exe	84
PID 2932 wrote to memory of 3512	2932	6b5a672444d08d6ee9edd139ff45875d_JaffaCakes118.exe	84
PID 2932 wrote to memory of 3512	2932	6b5a672444d08d6ee9edd139ff45875d_JaffaCakes118.exe	84
PID 2932 wrote to memory of 3512	2932	6b5a672444d08d6ee9edd139ff45875d_JaffaCakes118.exe	84
PID 3512 wrote to memory of 2928	3512	6b5a672444d08d6ee9edd139ff45875d_JaffaCakes118.exe	85
PID 3512 wrote to memory of 2928	3512	6b5a672444d08d6ee9edd139ff45875d_JaffaCakes118.exe	85
PID 3512 wrote to memory of 2928	3512	6b5a672444d08d6ee9edd139ff45875d_JaffaCakes118.exe	85
PID 2928 wrote to memory of 1572	2928	kcnnwoa.exe	86
PID 2928 wrote to memory of 1572	2928	kcnnwoa.exe	86
PID 2928 wrote to memory of 1572	2928	kcnnwoa.exe	86
PID 2928 wrote to memory of 1572	2928	kcnnwoa.exe	86
PID 2928 wrote to memory of 1572	2928	kcnnwoa.exe	86
PID 2928 wrote to memory of 1572	2928	kcnnwoa.exe	86
PID 2928 wrote to memory of 1572	2928	kcnnwoa.exe	86
PID 2928 wrote to memory of 1572	2928	kcnnwoa.exe	86
PID 1572 wrote to memory of 4600	1572	kcnnwoa.exe	87
PID 1572 wrote to memory of 4600	1572	kcnnwoa.exe	87
PID 1572 wrote to memory of 4600	1572	kcnnwoa.exe	87
PID 1572 wrote to memory of 4600	1572	kcnnwoa.exe	87
PID 1572 wrote to memory of 4600	1572	kcnnwoa.exe	87
PID 3512 wrote to memory of 4524	3512	6b5a672444d08d6ee9edd139ff45875d_JaffaCakes118.exe	90
PID 3512 wrote to memory of 4524	3512	6b5a672444d08d6ee9edd139ff45875d_JaffaCakes118.exe	90
PID 3512 wrote to memory of 4524	3512	6b5a672444d08d6ee9edd139ff45875d_JaffaCakes118.exe	90

C:\Users\Admin\AppData\Local\Temp\6b5a672444d08d6ee9edd139ff45875d_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\6b5a672444d08d6ee9edd139ff45875d_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2932
- C:\Users\Admin\AppData\Local\Temp\6b5a672444d08d6ee9edd139ff45875d_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\6b5a672444d08d6ee9edd139ff45875d_JaffaCakes118.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3512
- - C:\Users\Admin\kcnnwoa.exe
    "C:\Users\Admin\kcnnwoa.exe" /r
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2928
  - - C:\Users\Admin\kcnnwoa.exe
      "C:\Users\Admin\kcnnwoa.exe" /r
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:1572
    - - C:\Windows\SysWOW64\svchost.exe
        
        svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:4600
      - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 4600 -s 320
        6⤵
        Program crash
        
        PID:3908
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\5575.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4524

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 4600 -ip 4600
1⤵
PID:1568

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

5575.bat

Path C:\Users\Admin\AppData\Local\Temp\5575.bat
Size 117B
SHA256 324418e2f4dff6fcdfc90b2a731a7fe469725d982024e9c2caf6b98ee922019c
MD5 10fbfa1e129b218e150b0bd1ae6c3839
SHA1 7410d8156dcfe3f57ba7007851dc14e4e1682c9f
SHA512 d32e6800bc55cd4ff6089b64aa7bdbec571906c82fb0391cf3ae236afe6e395781028e4ff1fb0edfdd048e756825ccacf1f01f3642af461e05d0796213a8ee4e
MD5 SHA1 SHA512

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kcnnwoa.exe

Path C:\Users\Admin\kcnnwoa.exe
Size 209KB
SHA256 e210917fb03f075f4aa2f5dc7dbe64f824a5763842ac6548f65f15a56fb89981
MD5 6b5a672444d08d6ee9edd139ff45875d
SHA1 fb525eb026fabbb12ba66cad34c977f258da2121
SHA512 ff6ce1ed00b543c4609ace2cb242393dedb2f6e5298ee95d02941740a38ecdefac3571ad244062ca3fc7c44b36edd366efb5a9d90e8ef69e2b2e645b7a37fbe0
SSDEEP 3072:/wlkxQRyFl7Rx1LAQRqgU6LFDRqyN2cNMNugf2kt/KyBR0p58A7uBEACzGxDKZ72:4lkOYFdRb0Q4gvLFXffgrBQ7uBEAXSg
MD5 SHA1 SHA512 SSDEEP

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memory/1572-13-0x0000000000400000-0x0000000000410000-memory.dmp

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memory/3512-26-0x0000000000400000-0x0000000000410000-memory.dmp

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memory/3512-2-0x0000000000400000-0x0000000000410000-memory.dmp

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memory/3512-4-0x0000000000400000-0x0000000000410000-memory.dmp

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memory/3512-0-0x0000000000400000-0x0000000000410000-memory.dmp

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memory/4600-21-0x0000000000780000-0x0000000000790000-memory.dmp

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memory/4600-14-0x0000000000780000-0x0000000000790000-memory.dmp

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memory/4600-29-0x0000000000780000-0x0000000000790000-memory.dmp

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memory/4600-30-0x0000000000F20000-0x0000000000F21000-memory.dmp

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memory/4600-31-0x0000000000780000-0x0000000000790000-memory.dmp

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memory/4600-32-0x0000000000780000-0x0000000000790000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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