db91946513e74b2d19ab52603582e09371f9dfc1c27862baff04f2ed422afae2

General

Target

db91946513e74b2d19ab52603582e09371f9dfc1c27862baff04f2ed422afae2.exe
Size

966KB
MD5

0ac261ab4c4a757a3f5901fb018ec763
SHA1

955efb9882c85d9e6fd905d98a2afcbfb7cd952c
SHA256

db91946513e74b2d19ab52603582e09371f9dfc1c27862baff04f2ed422afae2
SHA512

249e61ca286a445e714fa5aa9b5686b531db094979b77b27f155dee01abe2d0c082cf60081a5e2f7a9de8d1730d101cb70f717f6e37010eb2ed5c6c9a3ba6993
SSDEEP

12288:8uPUTLYcAaUMhUhLupXshh1PEd5hOoE+L77QFIVPnvZksCSsMeuPoG32jt+yna:8uPmLDUMihIXCE5Gu779fv7CSsPt+z

Score

7^/10

discovery persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

Isass.exe

pid process

4080 Isass.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

pid	process
4080	Isass.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

db91946513e74b2d19ab52603582e09371f9dfc1c27862baff04f2ed422afae2.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Isass.exe = "C:\\Users\\Public\\Microsoft Build\\Isass.exe"	db91946513e74b2d19ab52603582e09371f9dfc1c27862baff04f2ed422afae2.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Isass.exe = "C:\\Users\\Public\\Microsoft Build\\Isass.exe"	db91946513e74b2d19ab52603582e09371f9dfc1c27862baff04f2ed422afae2.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:

db91946513e74b2d19ab52603582e09371f9dfc1c27862baff04f2ed422afae2.exeIsass.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	db91946513e74b2d19ab52603582e09371f9dfc1c27862baff04f2ed422afae2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Isass.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

db91946513e74b2d19ab52603582e09371f9dfc1c27862baff04f2ed422afae2.exeIsass.exe

pid	process
3576	db91946513e74b2d19ab52603582e09371f9dfc1c27862baff04f2ed422afae2.exe
3576	db91946513e74b2d19ab52603582e09371f9dfc1c27862baff04f2ed422afae2.exe
4080	Isass.exe
4080	Isass.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

db91946513e74b2d19ab52603582e09371f9dfc1c27862baff04f2ed422afae2.exe

description	pid	process	target process
PID 3576 wrote to memory of 4080	3576	db91946513e74b2d19ab52603582e09371f9dfc1c27862baff04f2ed422afae2.exe	Isass.exe
PID 3576 wrote to memory of 4080	3576	db91946513e74b2d19ab52603582e09371f9dfc1c27862baff04f2ed422afae2.exe	Isass.exe
PID 3576 wrote to memory of 4080	3576	db91946513e74b2d19ab52603582e09371f9dfc1c27862baff04f2ed422afae2.exe	Isass.exe

C:\Users\Admin\AppData\Local\Temp\db91946513e74b2d19ab52603582e09371f9dfc1c27862baff04f2ed422afae2.exe
"C:\Users\Admin\AppData\Local\Temp\db91946513e74b2d19ab52603582e09371f9dfc1c27862baff04f2ed422afae2.exe"
1⤵
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3576
- 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:4080

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

C:\Users\Admin\AppData\Local\Microsoft\OneDrive\18.151.0729.0013\FileCoAuth.exe

Filesize
1.4MB

MD5
cf6078b2496b783ce709935ca5f5702f

SHA1
a560531070059bbdc74bf422dc14f52bdb074c62

SHA256
c458f61eed4f555c9fae6a92b621c25a72d2737ad12aa288776295de2027cfc5

SHA512
e8e2302cc49a1b822135fa70f2337fe6f91cc02eb03c075e9e39d9891f3f0114a259c2a961d9b4956ecd952441e1b3aa169dd0125268537c6cc186e0d5e5b782

Download Submit
C:\Users\Public\Microsoft Build\Isass.exe

Filesize
966KB

MD5
0ac261ab4c4a757a3f5901fb018ec763

SHA1
955efb9882c85d9e6fd905d98a2afcbfb7cd952c

SHA256
db91946513e74b2d19ab52603582e09371f9dfc1c27862baff04f2ed422afae2

SHA512
249e61ca286a445e714fa5aa9b5686b531db094979b77b27f155dee01abe2d0c082cf60081a5e2f7a9de8d1730d101cb70f717f6e37010eb2ed5c6c9a3ba6993

Download Submit
memory/3576-0-0x00000000025A0000-0x00000000025A1000-memory.dmp

Filesize
4KB

Download
memory/3576-6-0x0000000000400000-0x00000000016A3000-memory.dmp

Filesize
18.6MB

Download
memory/4080-15-0x0000000000400000-0x00000000016A3000-memory.dmp

Filesize
18.6MB

Download
memory/4080-10-0x0000000000400000-0x00000000016A3000-memory.dmp

Filesize
18.6MB

Download
memory/4080-11-0x0000000000400000-0x00000000016A3000-memory.dmp

Filesize
18.6MB

Download
memory/4080-7-0x0000000000400000-0x00000000016A3000-memory.dmp

Filesize
18.6MB

Download
memory/4080-5-0x0000000001A50000-0x0000000001A51000-memory.dmp

Filesize
4KB

Download
memory/4080-16-0x0000000000400000-0x00000000016A3000-memory.dmp

Filesize
18.6MB

Download
memory/4080-21-0x0000000000400000-0x00000000016A3000-memory.dmp

Filesize
18.6MB

Download
memory/4080-25-0x0000000000400000-0x00000000016A3000-memory.dmp

Filesize
18.6MB

Download
memory/4080-31-0x0000000000400000-0x00000000016A3000-memory.dmp

Filesize
18.6MB

Download
memory/4080-32-0x0000000000400000-0x00000000016A3000-memory.dmp

Filesize
18.6MB

Download
memory/4080-39-0x0000000000400000-0x00000000016A3000-memory.dmp

Filesize
18.6MB

Download
memory/4080-40-0x0000000000400000-0x00000000016A3000-memory.dmp

Filesize
18.6MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads