a5c2313b5f7caeb02f3b1c24b880b4fdb237c12a9c14f50fbad593bf9fcb55c0

Analysis

max time kernel
142s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
03/05/2024, 01:47

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General

Target

a5c2313b5f7caeb02f3b1c24b880b4fdb237c12a9c14f50fbad593bf9fcb55c0.exe
Size

213KB
MD5

821f323f150bda90345f5a6b9938a907
SHA1

7d921a2aa587d43b7cd4cf7119ee1ac24ab45be4
SHA256

a5c2313b5f7caeb02f3b1c24b880b4fdb237c12a9c14f50fbad593bf9fcb55c0
SHA512

e825ca4e3720276e9fd40e0489069ad65e167103168980eb750a82f050dc55b9c9a2bebe90f97eedcf6ae6f3919ba47979cef0d71e9a8179b548672aaa89a0b8
SSDEEP

6144:ztvBPnU1b7e9SQii1EkoNlhlrQ2ZrM2x:Zv1nWdQP1EDhZPx

Score

7^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2560	Isass.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2860750803-256193626-1801997576-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Isass.exe = "C:\\Program Files (x86)\\Microsoft Build\\Isass.exe"	a5c2313b5f7caeb02f3b1c24b880b4fdb237c12a9c14f50fbad593bf9fcb55c0.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Isass.exe = "C:\\Program Files (x86)\\Microsoft Build\\Isass.exe"	a5c2313b5f7caeb02f3b1c24b880b4fdb237c12a9c14f50fbad593bf9fcb55c0.exe

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Microsoft Build\Isass.exe	a5c2313b5f7caeb02f3b1c24b880b4fdb237c12a9c14f50fbad593bf9fcb55c0.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
232	a5c2313b5f7caeb02f3b1c24b880b4fdb237c12a9c14f50fbad593bf9fcb55c0.exe
232	a5c2313b5f7caeb02f3b1c24b880b4fdb237c12a9c14f50fbad593bf9fcb55c0.exe
2560	Isass.exe
2560	Isass.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 232 wrote to memory of 2560	232	a5c2313b5f7caeb02f3b1c24b880b4fdb237c12a9c14f50fbad593bf9fcb55c0.exe	84
PID 232 wrote to memory of 2560	232	a5c2313b5f7caeb02f3b1c24b880b4fdb237c12a9c14f50fbad593bf9fcb55c0.exe	84
PID 232 wrote to memory of 2560	232	a5c2313b5f7caeb02f3b1c24b880b4fdb237c12a9c14f50fbad593bf9fcb55c0.exe	84

C:\Users\Admin\AppData\Local\Temp\a5c2313b5f7caeb02f3b1c24b880b4fdb237c12a9c14f50fbad593bf9fcb55c0.exe
"C:\Users\Admin\AppData\Local\Temp\a5c2313b5f7caeb02f3b1c24b880b4fdb237c12a9c14f50fbad593bf9fcb55c0.exe"
1⤵
- Adds Run key to start application
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:232
- C:\Program Files (x86)\Microsoft Build\Isass.exe
  "C:\Program Files (x86)\Microsoft Build\Isass.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  PID:2560

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:\Program Files (x86)\Microsoft Build\Isass.exe

Filesize
213KB

MD5
821f323f150bda90345f5a6b9938a907

SHA1
7d921a2aa587d43b7cd4cf7119ee1ac24ab45be4

SHA256
a5c2313b5f7caeb02f3b1c24b880b4fdb237c12a9c14f50fbad593bf9fcb55c0

SHA512
e825ca4e3720276e9fd40e0489069ad65e167103168980eb750a82f050dc55b9c9a2bebe90f97eedcf6ae6f3919ba47979cef0d71e9a8179b548672aaa89a0b8

Download Submit
C:\ProgramData\Microsoft\ClickToRun\{9AC08E99-230B-47e8-9721-4577B7F124EA}\integrator.exe

Filesize
6.8MB

MD5
7ca7d515f42c802dfb928ab2d2ec6267

SHA1
9777488ba1232338ba7138b052d131040c413ef3

SHA256
0ac4c2940f5e3805297516322724ae82b679f9ef3505e1c9ad7434540b7b7437

SHA512
6c55d0044dd79b3d433965199db83b4d311933f2167f3ce90d1865b58e74cb513aec68df4a1fdb423dd808d3460d7cee4fcfb768704c47b7ae840c40de0a56ba

Download Submit
memory/232-5-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/232-4-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2560-18-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2560-25-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2560-9-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2560-7-0x0000000001A60000-0x0000000001A61000-memory.dmp

Filesize
4KB

Download
memory/2560-14-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2560-15-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2560-6-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2560-23-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2560-24-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2560-8-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2560-32-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2560-33-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2560-39-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2560-42-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2560-43-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2560-44-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2560-45-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download