b510ef45ffff63592b23eed367794631fe67f1dd14e473cdcfd87ec2ab2bf825

Analysis

max time kernel
150s
max time network
124s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
11/03/2024, 13:43

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General

Target

c0bbcc1266d11434d5a50ba752c73069.exe
Size

14KB
MD5

c0bbcc1266d11434d5a50ba752c73069
SHA1

cc8dc01210ca021cb903181d65874373d88bc79f
SHA256

b510ef45ffff63592b23eed367794631fe67f1dd14e473cdcfd87ec2ab2bf825
SHA512

99b86e8612c0f5287c837e6fbdc41fbecf7e5314f91863fdf448a513ba728fdb710bc6c1592d9a4af1028772e2e98a4ec6c6d46dea4e6c6a3dbc80ade8ecc7dd
SSDEEP

192:iPonnKKesSt4q2VOtQKYpghjgR8cri+jz4GWGYOuI9kxCZfrhhTTBS+qGaIHD7Nc:YonK/sStGDg1J47vRY8BfrnlL3hVkl

Score

8^/10

persistence upx

Malware Config

Signatures

Modifies AppInit DLL entries 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1547.001

Modify Registry
T1112

Deletes itself 1 IoCs

pid	Process
2440	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
2456	ezcronk.exe

Loads dropped DLL 2 IoCs

pid	Process
1972	c0bbcc1266d11434d5a50ba752c73069.exe
1972	c0bbcc1266d11434d5a50ba752c73069.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/1972-0-0x0000000000400000-0x0000000000412000-memory.dmp	upx
behavioral1/files/0x000b00000001507e-3.dat	upx
behavioral1/memory/2456-11-0x0000000000400000-0x0000000000412000-memory.dmp	upx
behavioral1/memory/1972-12-0x0000000000400000-0x0000000000412000-memory.dmp	upx

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\ezcronk.exe	c0bbcc1266d11434d5a50ba752c73069.exe
File opened for modification	C:\Windows\SysWOW64\ezcronk.exe	c0bbcc1266d11434d5a50ba752c73069.exe
File created	C:\Windows\SysWOW64\ezcron.dll	c0bbcc1266d11434d5a50ba752c73069.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1972 wrote to memory of 2456	1972	c0bbcc1266d11434d5a50ba752c73069.exe	28
PID 1972 wrote to memory of 2456	1972	c0bbcc1266d11434d5a50ba752c73069.exe	28
PID 1972 wrote to memory of 2456	1972	c0bbcc1266d11434d5a50ba752c73069.exe	28
PID 1972 wrote to memory of 2456	1972	c0bbcc1266d11434d5a50ba752c73069.exe	28
PID 1972 wrote to memory of 2440	1972	c0bbcc1266d11434d5a50ba752c73069.exe	31
PID 1972 wrote to memory of 2440	1972	c0bbcc1266d11434d5a50ba752c73069.exe	31
PID 1972 wrote to memory of 2440	1972	c0bbcc1266d11434d5a50ba752c73069.exe	31
PID 1972 wrote to memory of 2440	1972	c0bbcc1266d11434d5a50ba752c73069.exe	31

C:\Users\Admin\AppData\Local\Temp\c0bbcc1266d11434d5a50ba752c73069.exe
"C:\Users\Admin\AppData\Local\Temp\c0bbcc1266d11434d5a50ba752c73069.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:1972
- C:\Windows\SysWOW64\ezcronk.exe
  C:\Windows\system32\ezcronk.exe ˜‰
  2⤵
  - Executes dropped EXE
  PID:2456
- C:\Windows\SysWOW64\cmd.exe
  cmd /c C:\Users\Admin\AppData\Local\Temp\c0bbcc1266d11434d5a50ba752c73069.exe.bat
  2⤵
  - Deletes itself
  PID:2440

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\c0bbcc1266d11434d5a50ba752c73069.exe.bat

Filesize
182B

MD5
483ac8ae179093ed3bb0081aa711974e

SHA1
11d3e01d5e4d05698db46f9f51af82fb0ad2d7d7

SHA256
4a544eacff9d1cb7ea0f594917bbd4ef55bef5556df45f78c60780c1a9fd14a5

SHA512
9f583d10be18107e120f53c0005e01e00fb91d12ca7694adf2e3e4fd1600f0b8007d4a37644126e4255489d15240cda0fd92ed2c9e85178a0850a2895226a354

Download Submit
\Windows\SysWOW64\ezcronk.exe

Filesize
14KB

MD5
c0bbcc1266d11434d5a50ba752c73069

SHA1
cc8dc01210ca021cb903181d65874373d88bc79f

SHA256
b510ef45ffff63592b23eed367794631fe67f1dd14e473cdcfd87ec2ab2bf825

SHA512
99b86e8612c0f5287c837e6fbdc41fbecf7e5314f91863fdf448a513ba728fdb710bc6c1592d9a4af1028772e2e98a4ec6c6d46dea4e6c6a3dbc80ade8ecc7dd

Download Submit
memory/1972-0-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1972-10-0x0000000000230000-0x0000000000242000-memory.dmp

Filesize
72KB

Download
memory/1972-12-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1972-16-0x0000000000230000-0x0000000000242000-memory.dmp

Filesize
72KB

Download
memory/2456-11-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download