28a671a1fb0a9208aee1a3ed45579d468c6c56b39e24988b2a621ef15f105305

Analysis

max time kernel
117s
max time network
119s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
25-12-2023 08:05

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General

Target

10dd9d8df04d097d5700133143188d48.exe
Size

75KB
MD5

10dd9d8df04d097d5700133143188d48
SHA1

7138b909af43556aa633cb3525eead2cc4e504f6
SHA256

28a671a1fb0a9208aee1a3ed45579d468c6c56b39e24988b2a621ef15f105305
SHA512

f55fcd1538220da17ff74ebb2b7ee2fc4599110b8f54a62b9b4db781895bb1770123c89da775e413ae6d182a402c9095ac6cd52c30d1fae068b1c05817251f0f
SSDEEP

768:jZKM11gG4ChfiPO0rfz0shcUypMC5/VKhZyg3iw7hw:gMDgG4ChfiPOefgsOUqQwgA

Score

6^/10

persistence

Malware Config

Signatures

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\System applets = "C:\\Windows\\System\\applets.exe"	10dd9d8df04d097d5700133143188d48.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Syssrc32 = "C:\\Windows\\Syssrc32.exe"	10dd9d8df04d097d5700133143188d48.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\fndfst32 = "C:\\Windows\\System\\fndfst32.exe"	10dd9d8df04d097d5700133143188d48.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Explorer Shell = "C:\\Windows\\System\\Explorer.exe"	10dd9d8df04d097d5700133143188d48.exe

Drops file in Windows directory 14 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System\Explorer.exe	10dd9d8df04d097d5700133143188d48.exe
File created	C:\Windows\Help\intret.cnt	10dd9d8df04d097d5700133143188d48.exe
File created	C:\Windows\System\applets.exe	10dd9d8df04d097d5700133143188d48.exe
File created	C:\Windows\Syssrc32.exe	10dd9d8df04d097d5700133143188d48.exe
File opened for modification	C:\Windows\System\Sysexp32.exe	10dd9d8df04d097d5700133143188d48.exe
File opened for modification	C:\Windows\System\applets.exe	10dd9d8df04d097d5700133143188d48.exe
File opened for modification	C:\Windows\System\fndfst32.exe	10dd9d8df04d097d5700133143188d48.exe
File created	C:\Windows\System\fndfst32.exe	10dd9d8df04d097d5700133143188d48.exe
File created	C:\Windows\System\Explorer.exe	10dd9d8df04d097d5700133143188d48.exe
File opened for modification	C:\Windows\Help\intret.cnt	10dd9d8df04d097d5700133143188d48.exe
File created	C:\Windows\System\Sysexp32.exe	10dd9d8df04d097d5700133143188d48.exe
File opened for modification	C:\Windows\System\mplayerw.exe	10dd9d8df04d097d5700133143188d48.exe
File created	C:\Windows\System\mplayerw.exe	10dd9d8df04d097d5700133143188d48.exe
File opened for modification	C:\Windows\Syssrc32.exe	10dd9d8df04d097d5700133143188d48.exe

Program crash 1 IoCs

pid	pid_target	Process
2436	2536	WerFault.exe

Modifies registry class 3 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command	10dd9d8df04d097d5700133143188d48.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\Explore = "%SystemRoot%\\SysWow64\\NOTEPAD.EXE %1"	10dd9d8df04d097d5700133143188d48.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "C:\\Windows\\System\\Sysexp32.exe %1"	10dd9d8df04d097d5700133143188d48.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2536 wrote to memory of 2436	2536	10dd9d8df04d097d5700133143188d48.exe	15
PID 2536 wrote to memory of 2436	2536	10dd9d8df04d097d5700133143188d48.exe	15
PID 2536 wrote to memory of 2436	2536	10dd9d8df04d097d5700133143188d48.exe	15
PID 2536 wrote to memory of 2436	2536	10dd9d8df04d097d5700133143188d48.exe	15

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2536 -s 92
1⤵
- Program crash
PID:2436

C:\Users\Admin\AppData\Local\Temp\10dd9d8df04d097d5700133143188d48.exe
"C:\Users\Admin\AppData\Local\Temp\10dd9d8df04d097d5700133143188d48.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2536

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

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Downloads

C:\Windows\system\Sysexp32.exe

Filesize
87KB

MD5
5b3c5f69687bb3d9fbea06abe4c329bd

SHA1
37b892485b0f8d504ad7471438ef60021e288d62

SHA256
88a00bd92ff83e044623bdde909d2d7c74625667d26a917bd477184e5039f21f

SHA512
3efe6a96c1638a217ac679ab41798240a33c0f21877cd3e66c78570697e9c9d26f5d7c4a4d13d85b84ce2c9eafa944e63eaa698496be4c5c6d3140768f0955ff

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads