e9b46bc46e9bec0632d4e5311e5f79329ddba93416479bd9a2b9d57f13e7c898

Analysis

max time kernel
148s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
09/08/2024, 08:30

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General

Target
file.exe
Size 6.2MB
Sample240809-kd568ssdkh
SHA256 e9b46bc46e9bec0632d4e5311e5f79329ddba93416479bd9a2b9d57f13e7c898
MD5 dc074ad153c3355dcf323db77863b404
SHA1 ae3cd6238550adca3a2809a302d536dce90957fa
SHA512 b9b8820540576ae9b2bf372c5ec8c7a1ea8f6db4d4547668b77e67223a45cd608e998b1b74352419e6c2265e3c7552afb43ed7bff32b611c789960868474e195
SSDEEP 98304:ssRWMlKfFfdLLuA6quwceROHDNfjZa+SVlzVORsb98+L4Ow9fFrSfGk:ssRWMsWAe/eROH5A+S3Qs/Lm99rSe
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

discovery persistence

Malware Config

Signatures

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\PowerExpertNNT.lnk	file.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-1-5-21-1194130065-3471212556-1656947724-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ExtreamFanV6 = "C:\\Users\\Admin\\AppData\\Local\\ExtreamFanV6\\ExtreamFanV6.exe"	file.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	file.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
5108	schtasks.exe
1132	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
536	file.exe
536	file.exe
536	file.exe
536	file.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 536 wrote to memory of 5108	536	file.exe	86
PID 536 wrote to memory of 5108	536	file.exe	86
PID 536 wrote to memory of 5108	536	file.exe	86
PID 536 wrote to memory of 1132	536	file.exe	88
PID 536 wrote to memory of 1132	536	file.exe	88
PID 536 wrote to memory of 1132	536	file.exe	88

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:536
- C:\Windows\SysWOW64\schtasks.exe
  schtasks /create /f /RU "Admin" /tr "C:\ProgramData\jewkkwnf\jewkkwnf.exe" /tn "jewkkwnf HR" /sc HOURLY /rl HIGHEST
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:5108
- C:\Windows\SysWOW64\schtasks.exe
  schtasks /create /f /RU "Admin" /tr "C:\ProgramData\jewkkwnf\jewkkwnf.exe" /tn "jewkkwnf LG" /sc ONLOGON /rl HIGHEST
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:1132

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

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

jewkkwnf.exe

Path C:\ProgramData\jewkkwnf\jewkkwnf.exe
Size 6.2MB
SHA256 e9b46bc46e9bec0632d4e5311e5f79329ddba93416479bd9a2b9d57f13e7c898
MD5 dc074ad153c3355dcf323db77863b404
SHA1 ae3cd6238550adca3a2809a302d536dce90957fa
SHA512 b9b8820540576ae9b2bf372c5ec8c7a1ea8f6db4d4547668b77e67223a45cd608e998b1b74352419e6c2265e3c7552afb43ed7bff32b611c789960868474e195
SSDEEP 98304:ssRWMlKfFfdLLuA6quwceROHDNfjZa+SVlzVORsb98+L4Ow9fFrSfGk:ssRWMsWAe/eROH5A+S3Qs/Lm99rSe
MD5 SHA1 SHA512 SSDEEP

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memory/536-1-0x00000000017D0000-0x00000000017D1000-memory.dmp

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memory/536-0-0x00000000017C0000-0x00000000017C1000-memory.dmp

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memory/536-6-0x0000000000D8A000-0x000000000114F000-memory.dmp

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memory/536-5-0x00000000034F0000-0x00000000034F1000-memory.dmp

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memory/536-4-0x0000000001830000-0x0000000001831000-memory.dmp

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memory/536-7-0x0000000003500000-0x0000000003501000-memory.dmp

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memory/536-3-0x0000000001820000-0x0000000001821000-memory.dmp

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memory/536-2-0x0000000001810000-0x0000000001811000-memory.dmp

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memory/536-8-0x0000000000D00000-0x0000000001784000-memory.dmp

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memory/536-18-0x0000000000D8A000-0x000000000114F000-memory.dmp

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memory/536-19-0x0000000000D00000-0x0000000001784000-memory.dmp

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