ad45617ba5cad264fba8428616d3a7ea425828119b9b65586c5755e95eb5bb78

Analysis

max time kernel
153s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
25/01/2024, 00:36

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General

Target

7345e92b8c434600003f1440d40b5569.exe
Size

71KB
MD5

7345e92b8c434600003f1440d40b5569
SHA1

f7ea424eab6519bf070d79e4286d526171d4e50c
SHA256

ad45617ba5cad264fba8428616d3a7ea425828119b9b65586c5755e95eb5bb78
SHA512

4af953262d4f5b4b91cae27aa6d30af1fd4452c48c5daa86ef2192184176868834a2a096c5609d4d6e4816bbead619b6d079a6af32587f96c22e5fb53214432d
SSDEEP

1536:aGW7+MJFBwiJDALEnfUXsIOKPSkN68gzUGGT6SVKPnRBuT0KcAyjN:aGc+MJFOZmMX2ijVgzUGGTh+RB+0vN

Score

7^/10

persistence upx

Malware Config

Signatures

Loads dropped DLL 2 IoCs

pid	Process
4996	7345e92b8c434600003f1440d40b5569.exe
2520	rundll32.exe

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4996-2-0x0000000000400000-0x0000000000415000-memory.dmp	upx
behavioral2/memory/4996-3-0x0000000000400000-0x0000000000415000-memory.dmp	upx
behavioral2/memory/4996-4-0x0000000000400000-0x0000000000415000-memory.dmp	upx
behavioral2/memory/4996-11-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/4996-12-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/4996-15-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/2520-34-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/2520-35-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/2520-36-0x0000000010000000-0x0000000010014000-memory.dmp	upx

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\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\MSServer = "rundll32.exe C:\\Windows\\system32\\vtUkhgfD.dll,#1"	rundll32.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\vtUkhgfD.dll	7345e92b8c434600003f1440d40b5569.exe
File opened for modification	C:\Windows\SysWOW64\awtustsp.dll	7345e92b8c434600003f1440d40b5569.exe
File created	C:\Windows\SysWOW64\awtustsp.dll	7345e92b8c434600003f1440d40b5569.exe
File created	C:\Windows\SysWOW64\vtUkhgfD.dll	7345e92b8c434600003f1440d40b5569.exe

Modifies registry class 4 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{FD417378-F411-4B77-BBEE-4893BB670D4C}	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{FD417378-F411-4B77-BBEE-4893BB670D4C}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{FD417378-F411-4B77-BBEE-4893BB670D4C}\InprocServer32\ = "C:\\Windows\\SysWow64\\vtUkhgfD.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{FD417378-F411-4B77-BBEE-4893BB670D4C}\InprocServer32\ThreadingModel = "Both"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4996	7345e92b8c434600003f1440d40b5569.exe
4996	7345e92b8c434600003f1440d40b5569.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe
2520	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4996	7345e92b8c434600003f1440d40b5569.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4996	7345e92b8c434600003f1440d40b5569.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 4996 wrote to memory of 612	4996	7345e92b8c434600003f1440d40b5569.exe	3
PID 4996 wrote to memory of 2520	4996	7345e92b8c434600003f1440d40b5569.exe	95
PID 4996 wrote to memory of 2520	4996	7345e92b8c434600003f1440d40b5569.exe	95
PID 4996 wrote to memory of 2520	4996	7345e92b8c434600003f1440d40b5569.exe	95
PID 4996 wrote to memory of 2408	4996	7345e92b8c434600003f1440d40b5569.exe	96
PID 4996 wrote to memory of 2408	4996	7345e92b8c434600003f1440d40b5569.exe	96
PID 4996 wrote to memory of 2408	4996	7345e92b8c434600003f1440d40b5569.exe	96

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:612

C:\Users\Admin\AppData\Local\Temp\7345e92b8c434600003f1440d40b5569.exe
"C:\Users\Admin\AppData\Local\Temp\7345e92b8c434600003f1440d40b5569.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4996
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Windows\system32\vtUkhgfD.dll,a
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  PID:2520
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\removalfile.bat "C:\Users\Admin\AppData\Local\Temp\7345e92b8c434600003f1440d40b5569.exe"
  2⤵
  PID:2408

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\removalfile.bat

Filesize
43B

MD5
9a7ef09167a6f4433681b94351509043

SHA1
259b1375ed8e84943ca1d42646bb416325c89e12

SHA256
d5739a0510d89da572eb0b0d394d4fb4dd361cd9ee0144b9b31c590df93c3be7

SHA512
96b84cd88a0e4b7c1122af3ed6ce5edf0a9a4e9bf79575eadfac16b2c46f1278d57755d29f21d7c6dcb4403be24b7ac7da4837c6cc9c602342a8f2b8e54883df

Download Submit
C:\Windows\SysWOW64\awtustsp.dll

Filesize
43KB

MD5
02a2b1e9f7551ee28b40224ddb628086

SHA1
2869a7dcfed1c4a0b35e4c9a3aa8136933674068

SHA256
04781942f4f8e6db2f714bea9c89eace7e86653f8ac29908a95d13bccdd0099f

SHA512
74b182e2850db9b22d018eb9ff3352b8bb3c1996781e7338e26ce71ee7a5fd6a981fbca63a607520977e65e12cda6fef5f6a3187016af44bfb0a700cd25104e3

Download Submit
memory/2520-36-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/2520-35-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/2520-34-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/4996-11-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/4996-0-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4996-12-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/4996-13-0x0000000002BB0000-0x0000000002BB9000-memory.dmp

Filesize
36KB

Download
memory/4996-15-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/4996-23-0x00000000005B0000-0x00000000005C0000-memory.dmp

Filesize
64KB

Download
memory/4996-4-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4996-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4996-2-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4996-1-0x00000000005B0000-0x00000000005C0000-memory.dmp

Filesize
64KB

Download