86e32debc724ab505081f11fd3fc8088cdf26654411053deb76a4aec3d7e665a

General

Target

f11c7bce06ba3ffcb49c370e81607da0N.exe
Size

538KB
MD5

f11c7bce06ba3ffcb49c370e81607da0
SHA1

43c21f0230ed183d9da37d68411dff6002bc8907
SHA256

86e32debc724ab505081f11fd3fc8088cdf26654411053deb76a4aec3d7e665a
SHA512

e59b0ba543ca9fa6b457f578481072745a4571f2cd3f351226ecaa513b6260e189cc5af9811d6f0c7373e3c9902b3ef632d8b6c9cae18663932697f4ec20f453
SSDEEP

12288:/n8yN0Mr8ZJJw1jm0Uq+pnWHDiZPWho5hWcrIm+xM/EWGKWYuaP:vPuZJK1Kbgq+h2rdjWYb

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 3 IoCs

pid	Process
2688	Isass.exe
2364	Isass.exe
2708	f11c7bce06ba3ffcb49c370e81607da0N.exe

Loads dropped DLL 6 IoCs

pid	Process
2640	f11c7bce06ba3ffcb49c370e81607da0N.exe
2640	f11c7bce06ba3ffcb49c370e81607da0N.exe
2640	f11c7bce06ba3ffcb49c370e81607da0N.exe
2640	f11c7bce06ba3ffcb49c370e81607da0N.exe
2364	Isass.exe
2688	Isass.exe

Reads user/profile data of web browsers 2 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

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-1-5-21-940600906-3464502421-4240639183-1000\Software\Microsoft\Windows\CurrentVersion\Run\Isass.exe = "C:\\Users\\Public\\Microsoft Build\\Isass.exe"	f11c7bce06ba3ffcb49c370e81607da0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Isass.exe = "C:\\Users\\Public\\Microsoft Build\\Isass.exe"	f11c7bce06ba3ffcb49c370e81607da0N.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 4 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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f11c7bce06ba3ffcb49c370e81607da0N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Isass.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Isass.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f11c7bce06ba3ffcb49c370e81607da0N.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2640	f11c7bce06ba3ffcb49c370e81607da0N.exe
2688	Isass.exe
2364	Isass.exe
2364	Isass.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2640 wrote to memory of 2688	2640	f11c7bce06ba3ffcb49c370e81607da0N.exe	30
PID 2640 wrote to memory of 2688	2640	f11c7bce06ba3ffcb49c370e81607da0N.exe	30
PID 2640 wrote to memory of 2688	2640	f11c7bce06ba3ffcb49c370e81607da0N.exe	30
PID 2640 wrote to memory of 2688	2640	f11c7bce06ba3ffcb49c370e81607da0N.exe	30
PID 2640 wrote to memory of 2364	2640	f11c7bce06ba3ffcb49c370e81607da0N.exe	31
PID 2640 wrote to memory of 2364	2640	f11c7bce06ba3ffcb49c370e81607da0N.exe	31
PID 2640 wrote to memory of 2364	2640	f11c7bce06ba3ffcb49c370e81607da0N.exe	31
PID 2640 wrote to memory of 2364	2640	f11c7bce06ba3ffcb49c370e81607da0N.exe	31
PID 2364 wrote to memory of 2708	2364	Isass.exe	32
PID 2364 wrote to memory of 2708	2364	Isass.exe	32
PID 2364 wrote to memory of 2708	2364	Isass.exe	32
PID 2364 wrote to memory of 2708	2364	Isass.exe	32

C:\Users\Admin\AppData\Local\Temp\f11c7bce06ba3ffcb49c370e81607da0N.exe
"C:\Users\Admin\AppData\Local\Temp\f11c7bce06ba3ffcb49c370e81607da0N.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:2640
- C:\Users\Public\Microsoft Build\Isass.exe
  "C:\Users\Public\Microsoft Build\Isass.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:2688
- C:\Users\Public\Microsoft Build\Isass.exe
  "C:\Users\Public\Microsoft Build\Isass.exe" Tablet C:\Users\Admin\AppData\Local\Temp\f11c7bce06ba3ffcb49c370e81607da0N.exe
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2364
- - C:\Users\Admin\AppData\Local\Temp\f11c7bce06ba3ffcb49c370e81607da0N.exe
    "C:\Users\Admin\AppData\Local\Temp\f11c7bce06ba3ffcb49c370e81607da0N.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2708

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

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Information Discovery

1

T1082

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\Public\Microsoft Build\Isass.exe

Filesize
216KB

MD5
0609171772ed1682bd6adb41673f32b2

SHA1
75456deb7fe05cc2a5806623b6b216bc4fc47243

SHA256
de84bb36c0b33b5ddc3f6d54c8b087649b51e8cf8a80bace4fd92258d46443e3

SHA512
693c912a8253c62a446f072035f9775dfce0c45b0160710ee4bf8a0c296af0f9fcda24b22bc24050d837338b22371bc6eecd6f3e8ed7e0bde8b13b56e83ce778

Download Submit
\Users\Admin\AppData\Local\Temp\f11c7bce06ba3ffcb49c370e81607da0N.exe

Filesize
284KB

MD5
a42b35f975d88c1370a7aff084ee57a7

SHA1
bee1408fe0b15f6f719f003e46aee5ec424cf608

SHA256
56cc9e7e3767c0cffae8161bf0ad13457487c1b422e2879b897dbd4bab115776

SHA512
b92d05515e18277db660118934e70678ee2a3bb66005bad19bb417ffaedb22a63727a5a697ca3ac0f6c48f6f5593ba45ab80f4ebdc0eaed10d80b7af04d45b23

Download Submit
memory/2364-25-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2640-8-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2640-11-0x0000000004560000-0x0000000005809000-memory.dmp

Filesize
18.7MB

Download
memory/2640-9-0x0000000004560000-0x0000000005809000-memory.dmp

Filesize
18.7MB

Download
memory/2640-15-0x00000000003B0000-0x00000000003B1000-memory.dmp

Filesize
4KB

Download
memory/2640-17-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2688-26-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2688-39-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2688-12-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2688-27-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2688-30-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2688-31-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2688-38-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2688-16-0x00000000003B0000-0x00000000003B1000-memory.dmp

Filesize
4KB

Download
memory/2688-47-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2688-48-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2688-54-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2688-55-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2688-64-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2688-65-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads