f4f07e16de09d5cfc8471490f6df3550c0c1a94f5b517d203b54d83be757c1fb

General

Target

f4f07e16de09d5cfc8471490f6df3550c0c1a94f5b517d203b54d83be757c1fb.exe
Size

1.5MB
MD5

9a4cb5b1afaf1fe83375334bea26f035
SHA1

6f68ceef73933cc860bfe57afdfa92ef5141705f
SHA256

f4f07e16de09d5cfc8471490f6df3550c0c1a94f5b517d203b54d83be757c1fb
SHA512

ec8bbc1fccc84b61018679822ff39194595c45038e034c0bbeaa24e606fe22638d4bb6156467033b46eaece68867ae49de98dcc4add672b24b02710926def33a
SSDEEP

12288:8uPUTLYcAaUMhUhLupXshh1PEd5hOoMSACGOi68dG9TWRzSZYdTNMgtfpW6hNTkB:8uPmLDUMihIXCE5uEGOivISWYv2TKwn

Score

7^/10

discovery persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

Isass.exe

pid	Process
1356	Isass.exe

Loads dropped DLL 2 IoCs

Processes:

f4f07e16de09d5cfc8471490f6df3550c0c1a94f5b517d203b54d83be757c1fb.exe

pid	Process
392	f4f07e16de09d5cfc8471490f6df3550c0c1a94f5b517d203b54d83be757c1fb.exe
392	f4f07e16de09d5cfc8471490f6df3550c0c1a94f5b517d203b54d83be757c1fb.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

f4f07e16de09d5cfc8471490f6df3550c0c1a94f5b517d203b54d83be757c1fb.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\Isass.exe = "C:\\Users\\Public\\Microsoft Build\\Isass.exe"	f4f07e16de09d5cfc8471490f6df3550c0c1a94f5b517d203b54d83be757c1fb.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Isass.exe = "C:\\Users\\Public\\Microsoft Build\\Isass.exe"	f4f07e16de09d5cfc8471490f6df3550c0c1a94f5b517d203b54d83be757c1fb.exe

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

f4f07e16de09d5cfc8471490f6df3550c0c1a94f5b517d203b54d83be757c1fb.exeIsass.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f4f07e16de09d5cfc8471490f6df3550c0c1a94f5b517d203b54d83be757c1fb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Isass.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

f4f07e16de09d5cfc8471490f6df3550c0c1a94f5b517d203b54d83be757c1fb.exeIsass.exe

pid	Process
392	f4f07e16de09d5cfc8471490f6df3550c0c1a94f5b517d203b54d83be757c1fb.exe
1356	Isass.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

f4f07e16de09d5cfc8471490f6df3550c0c1a94f5b517d203b54d83be757c1fb.exe

description	pid	Process	procid_target
PID 392 wrote to memory of 1356	392	f4f07e16de09d5cfc8471490f6df3550c0c1a94f5b517d203b54d83be757c1fb.exe	29
PID 392 wrote to memory of 1356	392	f4f07e16de09d5cfc8471490f6df3550c0c1a94f5b517d203b54d83be757c1fb.exe	29
PID 392 wrote to memory of 1356	392	f4f07e16de09d5cfc8471490f6df3550c0c1a94f5b517d203b54d83be757c1fb.exe	29
PID 392 wrote to memory of 1356	392	f4f07e16de09d5cfc8471490f6df3550c0c1a94f5b517d203b54d83be757c1fb.exe	29

C:\Users\Admin\AppData\Local\Temp\f4f07e16de09d5cfc8471490f6df3550c0c1a94f5b517d203b54d83be757c1fb.exe
"C:\Users\Admin\AppData\Local\Temp\f4f07e16de09d5cfc8471490f6df3550c0c1a94f5b517d203b54d83be757c1fb.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:392
- C:\Users\Public\Microsoft Build\Isass.exe
  "C:\Users\Public\Microsoft Build\Isass.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:1356

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

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

\Users\Public\Microsoft Build\Isass.exe

Filesize
1.5MB

MD5
3bbb0f95dddf90eaf4dc4152201ae2ca

SHA1
0d5b5c02f2192170611ba7bfe384131bde927852

SHA256
958472218360465c75f26b355cc6a5d658f113af6d311ee7ee025e501e7db833

SHA512
b42c6049b112a7e37492a86bfaf47a3a7cefee2dc8a64fcc33e78d18a10a5d9c7b0bf2e04dd48f2bfe16ef4b9c8d88de9486f50c9c56b15009ac40c28b7e2e19

Download Submit
memory/392-11-0x0000000000400000-0x00000000016A3000-memory.dmp

Filesize
18.6MB

Download
memory/392-0-0x00000000003B0000-0x00000000003B1000-memory.dmp

Filesize
4KB

Download
memory/1356-14-0x0000000000400000-0x00000000016A3000-memory.dmp

Filesize
18.6MB

Download
memory/1356-13-0x00000000003B0000-0x00000000003B1000-memory.dmp

Filesize
4KB

Download
memory/1356-12-0x0000000000400000-0x00000000016A3000-memory.dmp

Filesize
18.6MB

Download
memory/1356-9-0x00000000003B0000-0x00000000003B1000-memory.dmp

Filesize
4KB

Download
memory/1356-17-0x0000000000400000-0x00000000016A3000-memory.dmp

Filesize
18.6MB

Download
memory/1356-21-0x0000000000400000-0x00000000016A3000-memory.dmp

Filesize
18.6MB

Download
memory/1356-25-0x0000000000400000-0x00000000016A3000-memory.dmp

Filesize
18.6MB

Download
memory/1356-30-0x0000000000400000-0x00000000016A3000-memory.dmp

Filesize
18.6MB

Download
memory/1356-34-0x0000000000400000-0x00000000016A3000-memory.dmp

Filesize
18.6MB

Download
memory/1356-40-0x0000000000400000-0x00000000016A3000-memory.dmp

Filesize
18.6MB

Download
memory/1356-41-0x0000000000400000-0x00000000016A3000-memory.dmp

Filesize
18.6MB

Download
memory/1356-46-0x0000000000400000-0x00000000016A3000-memory.dmp

Filesize
18.6MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads