a5c2313b5f7caeb02f3b1c24b880b4fdb237c12a9c14f50fbad593bf9fcb55c0

General

Target

a5c2313b5f7caeb02f3b1c24b880b4fdb237c12a9c14f50fbad593bf9fcb55c0.exe
Size

213KB
MD5

821f323f150bda90345f5a6b9938a907
SHA1

7d921a2aa587d43b7cd4cf7119ee1ac24ab45be4
SHA256

a5c2313b5f7caeb02f3b1c24b880b4fdb237c12a9c14f50fbad593bf9fcb55c0
SHA512

e825ca4e3720276e9fd40e0489069ad65e167103168980eb750a82f050dc55b9c9a2bebe90f97eedcf6ae6f3919ba47979cef0d71e9a8179b548672aaa89a0b8
SSDEEP

6144:ztvBPnU1b7e9SQii1EkoNlhlrQ2ZrM2x:Zv1nWdQP1EDhZPx

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2300	Isass.exe

Loads dropped DLL 2 IoCs

pid	Process
2460	a5c2313b5f7caeb02f3b1c24b880b4fdb237c12a9c14f50fbad593bf9fcb55c0.exe
2460	a5c2313b5f7caeb02f3b1c24b880b4fdb237c12a9c14f50fbad593bf9fcb55c0.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-1-5-21-2248906074-2862704502-246302768-1000\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 2 IoCs

pid	Process
2460	a5c2313b5f7caeb02f3b1c24b880b4fdb237c12a9c14f50fbad593bf9fcb55c0.exe
2300	Isass.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2460 wrote to memory of 2300	2460	a5c2313b5f7caeb02f3b1c24b880b4fdb237c12a9c14f50fbad593bf9fcb55c0.exe	28
PID 2460 wrote to memory of 2300	2460	a5c2313b5f7caeb02f3b1c24b880b4fdb237c12a9c14f50fbad593bf9fcb55c0.exe	28
PID 2460 wrote to memory of 2300	2460	a5c2313b5f7caeb02f3b1c24b880b4fdb237c12a9c14f50fbad593bf9fcb55c0.exe	28
PID 2460 wrote to memory of 2300	2460	a5c2313b5f7caeb02f3b1c24b880b4fdb237c12a9c14f50fbad593bf9fcb55c0.exe	28

C:\Users\Admin\AppData\Local\Temp\a5c2313b5f7caeb02f3b1c24b880b4fdb237c12a9c14f50fbad593bf9fcb55c0.exe
"C:\Users\Admin\AppData\Local\Temp\a5c2313b5f7caeb02f3b1c24b880b4fdb237c12a9c14f50fbad593bf9fcb55c0.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2460
- C:\Program Files (x86)\Microsoft Build\Isass.exe
  "C:\Program Files (x86)\Microsoft Build\Isass.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  PID:2300

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

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
memory/2300-19-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2300-14-0x0000000000220000-0x0000000000221000-memory.dmp

Filesize
4KB

Download
memory/2300-20-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2300-26-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2300-21-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2300-51-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2300-16-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2300-17-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2300-18-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2300-50-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2300-45-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2300-40-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2300-13-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2300-27-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2300-30-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2300-33-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2300-39-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2460-12-0x00000000041F0000-0x0000000005497000-memory.dmp

Filesize
18.7MB

Download
memory/2460-11-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2460-8-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2460-15-0x00000000041F0000-0x0000000005497000-memory.dmp

Filesize
18.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads