400f52306aa7c3994c36188a7682f81c67c6044927c96669c4917bb7c8957cb9

Analysis

max time kernel
152s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
03/10/2022, 23:46

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General

Target

400f52306aa7c3994c36188a7682f81c67c6044927c96669c4917bb7c8957cb9.exe
Size

126KB
MD5

08c57805f76b56ce5b0460cb7ca230e8
SHA1

672e08b079c40ffc8b102be43ee75f853e321200
SHA256

400f52306aa7c3994c36188a7682f81c67c6044927c96669c4917bb7c8957cb9
SHA512

58eaab26582f0a50a05f35961825158a330893d5a5ef363a73947591999f22cfc251ecb23c0cdacfb0cb50d8b9800c03f9118773aa316acdfda292fe356cc91c
SSDEEP

3072:mHtoJzgjQSTbdkGqtUW5MzjKtVs0DqcpYgdZzwIbMLRHJfyGzjcS:WtSWTRbLWeKtVsMqsAIbYP/zgS

Score

8^/10

evasion persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
724	herjek.exe

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Modify Existing Service

T1031

pid	Process
2344	netsh.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\herjek = "C:\\Windows\\herjek.exe"	400f52306aa7c3994c36188a7682f81c67c6044927c96669c4917bb7c8957cb9.exe

Drops file in Program Files directory 8 IoCs

description	ioc	Process
File created	C:\Program Files\7-Zip\	herjek.exe
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\	herjek.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\en-US\	herjek.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\	herjek.exe
File created	C:\Program Files\Common Files\microsoft shared\MSInfo\en-US\	herjek.exe
File created	C:\Program Files\Common Files\microsoft shared\MSInfo\	herjek.exe
File created	C:\Program Files\Common Files\microsoft shared\VSTO\10.0\	herjek.exe
File created	C:\Program Files\Google\Chrome\Application\89.0.4389.114\	herjek.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\Windows\herjek.exe	400f52306aa7c3994c36188a7682f81c67c6044927c96669c4917bb7c8957cb9.exe
File opened for modification	C:\Windows\herjek.exe	400f52306aa7c3994c36188a7682f81c67c6044927c96669c4917bb7c8957cb9.exe
File created	C:\Windows\herjek.config	herjek.exe
File opened for modification	C:\Windows\herjek.config	herjek.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 4896 wrote to memory of 724	4896	400f52306aa7c3994c36188a7682f81c67c6044927c96669c4917bb7c8957cb9.exe	83
PID 4896 wrote to memory of 724	4896	400f52306aa7c3994c36188a7682f81c67c6044927c96669c4917bb7c8957cb9.exe	83
PID 4896 wrote to memory of 724	4896	400f52306aa7c3994c36188a7682f81c67c6044927c96669c4917bb7c8957cb9.exe	83
PID 724 wrote to memory of 2344	724	herjek.exe	87
PID 724 wrote to memory of 2344	724	herjek.exe	87
PID 724 wrote to memory of 2344	724	herjek.exe	87
PID 724 wrote to memory of 1148	724	herjek.exe	88
PID 724 wrote to memory of 1148	724	herjek.exe	88
PID 724 wrote to memory of 1148	724	herjek.exe	88
PID 724 wrote to memory of 2888	724	herjek.exe	90
PID 724 wrote to memory of 2888	724	herjek.exe	90
PID 724 wrote to memory of 2888	724	herjek.exe	90
PID 1148 wrote to memory of 4716	1148	w32tm.exe	95
PID 1148 wrote to memory of 4716	1148	w32tm.exe	95
PID 2888 wrote to memory of 3112	2888	w32tm.exe	94
PID 2888 wrote to memory of 3112	2888	w32tm.exe	94

C:\Users\Admin\AppData\Local\Temp\400f52306aa7c3994c36188a7682f81c67c6044927c96669c4917bb7c8957cb9.exe
"C:\Users\Admin\AppData\Local\Temp\400f52306aa7c3994c36188a7682f81c67c6044927c96669c4917bb7c8957cb9.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4896
- C:\Windows\herjek.exe
  "C:\Windows\herjek.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in Program Files directory
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:724
- - C:\Windows\SysWOW64\netsh.exe
    netsh firewall set allowedprogram "C:\Windows\herjek.exe" enable
    3⤵
    - Modifies Windows Firewall
    PID:2344
- - C:\Windows\SysWOW64\w32tm.exe
    w32tm /config /syncfromflags:manual /manualpeerlist:time.windows.com,time.nist.gov
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1148
  - - C:\Windows\system32\w32tm.exe
      w32tm /config /syncfromflags:manual /manualpeerlist:time.windows.com,time.nist.gov
      4⤵
      PID:4716
- - C:\Windows\SysWOW64\w32tm.exe
    w32tm /config /update
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2888
  - - C:\Windows\system32\w32tm.exe
      w32tm /config /update
      4⤵
      PID:3112

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

T1031

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\herjek.exe

Filesize
126KB

MD5
08c57805f76b56ce5b0460cb7ca230e8

SHA1
672e08b079c40ffc8b102be43ee75f853e321200

SHA256
400f52306aa7c3994c36188a7682f81c67c6044927c96669c4917bb7c8957cb9

SHA512
58eaab26582f0a50a05f35961825158a330893d5a5ef363a73947591999f22cfc251ecb23c0cdacfb0cb50d8b9800c03f9118773aa316acdfda292fe356cc91c

Download Submit
C:\Windows\herjek.exe

Filesize
126KB

MD5
08c57805f76b56ce5b0460cb7ca230e8

SHA1
672e08b079c40ffc8b102be43ee75f853e321200

SHA256
400f52306aa7c3994c36188a7682f81c67c6044927c96669c4917bb7c8957cb9

SHA512
58eaab26582f0a50a05f35961825158a330893d5a5ef363a73947591999f22cfc251ecb23c0cdacfb0cb50d8b9800c03f9118773aa316acdfda292fe356cc91c

Download Submit
memory/4896-132-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/4896-135-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download