fcbf42133a6e8a5743b8d70891abbaca6b2ff299ecdeada0262422e089b11df1

General

Target

fcbf42133a6e8a5743b8d70891abbaca6b2ff299ecdeada0262422e089b11df1.exe
Size

313KB
MD5

6ee88251845d006df5ca02d8c79bfbf4
SHA1

a47a734c27b0a1247190387ee1556450d9038364
SHA256

fcbf42133a6e8a5743b8d70891abbaca6b2ff299ecdeada0262422e089b11df1
SHA512

e2fe5eb5cec4b7a7924f17d1799a9b75ae8ce8b9bad4ea8dccf262a4ee47393c35005a4b542a52988251cd40a251c31dff1a16c61475d30232dfca207731edde
SSDEEP

6144:ztvBPnU1b7e9SQii1EkoNlhlrQ2ZrM2xTYAp1ZEGItUoDs22:Zv1nWdQP1EDhZPxTYAp/EGWUoDN2

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
3056	Isass.exe
2648	NX_fcbf42133a6e8a5743b8d70891abbaca6b2ff299ecdeada0262422e089b11df1.exe

Loads dropped DLL 3 IoCs

pid	Process
2836	fcbf42133a6e8a5743b8d70891abbaca6b2ff299ecdeada0262422e089b11df1.exe
2836	fcbf42133a6e8a5743b8d70891abbaca6b2ff299ecdeada0262422e089b11df1.exe
2836	fcbf42133a6e8a5743b8d70891abbaca6b2ff299ecdeada0262422e089b11df1.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-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Windows\CurrentVersion\Run\Isass.exe = "C:\\Program Files (x86)\\Microsoft Build\\Isass.exe"	fcbf42133a6e8a5743b8d70891abbaca6b2ff299ecdeada0262422e089b11df1.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Isass.exe = "C:\\Program Files (x86)\\Microsoft Build\\Isass.exe"	fcbf42133a6e8a5743b8d70891abbaca6b2ff299ecdeada0262422e089b11df1.exe

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Microsoft Build\Isass.exe	fcbf42133a6e8a5743b8d70891abbaca6b2ff299ecdeada0262422e089b11df1.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2836	fcbf42133a6e8a5743b8d70891abbaca6b2ff299ecdeada0262422e089b11df1.exe
3056	Isass.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2836 wrote to memory of 3056	2836	fcbf42133a6e8a5743b8d70891abbaca6b2ff299ecdeada0262422e089b11df1.exe	28
PID 2836 wrote to memory of 3056	2836	fcbf42133a6e8a5743b8d70891abbaca6b2ff299ecdeada0262422e089b11df1.exe	28
PID 2836 wrote to memory of 3056	2836	fcbf42133a6e8a5743b8d70891abbaca6b2ff299ecdeada0262422e089b11df1.exe	28
PID 2836 wrote to memory of 3056	2836	fcbf42133a6e8a5743b8d70891abbaca6b2ff299ecdeada0262422e089b11df1.exe	28
PID 2836 wrote to memory of 2648	2836	fcbf42133a6e8a5743b8d70891abbaca6b2ff299ecdeada0262422e089b11df1.exe	29
PID 2836 wrote to memory of 2648	2836	fcbf42133a6e8a5743b8d70891abbaca6b2ff299ecdeada0262422e089b11df1.exe	29
PID 2836 wrote to memory of 2648	2836	fcbf42133a6e8a5743b8d70891abbaca6b2ff299ecdeada0262422e089b11df1.exe	29
PID 2836 wrote to memory of 2648	2836	fcbf42133a6e8a5743b8d70891abbaca6b2ff299ecdeada0262422e089b11df1.exe	29

C:\Users\Admin\AppData\Local\Temp\fcbf42133a6e8a5743b8d70891abbaca6b2ff299ecdeada0262422e089b11df1.exe
"C:\Users\Admin\AppData\Local\Temp\fcbf42133a6e8a5743b8d70891abbaca6b2ff299ecdeada0262422e089b11df1.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:2836
- C:\Program Files (x86)\Microsoft Build\Isass.exe
  "C:\Program Files (x86)\Microsoft Build\Isass.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  PID:3056
- C:\Users\Admin\AppData\Local\Temp\NX_fcbf42133a6e8a5743b8d70891abbaca6b2ff299ecdeada0262422e089b11df1.exe
  "C:\Users\Admin\AppData\Local\Temp\NX_fcbf42133a6e8a5743b8d70891abbaca6b2ff299ecdeada0262422e089b11df1.exe"
  2⤵
  - Executes dropped EXE
  PID:2648

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

Loading Replay Monitor...

Downloads

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

Filesize
213KB

MD5
bdbc66f943995a6e90a84dbc52be6521

SHA1
eaa4eec26be9f6e362e588a3c27e10f9ace38c7b

SHA256
c163b484c60b90a321e56379652328a19db4fa675f0fa809a64cf23d0366fb5e

SHA512
e2e5bc0b69aa90dc6f3a27cc9c58769f85270c5ec95086ee17fdb48f52bc6718ea914325a3b7b06cb1181e1e6b9b226e22abb8755c977647a95131a784ea2b01

Download Submit
\Users\Admin\AppData\Local\Temp\NX_fcbf42133a6e8a5743b8d70891abbaca6b2ff299ecdeada0262422e089b11df1.exe

Filesize
97KB

MD5
542d1a85dfc9d47d2ce73c885aaf2b5e

SHA1
018f6821486d6381fd536265732ee954993b6646

SHA256
14a89eda72e385f76bf15a7c4fd539c48837cf5df444a16f28c5b94f29799550

SHA512
33791b1af030a52148b41d5fe76b241b73847429f21c25c8bf79d2165591aa5af9d873e8f7d6c22d2a74176339840a99c2d7f60520c32127962200ee33a93021

Download Submit
memory/2836-21-0x0000000004370000-0x0000000005617000-memory.dmp

Filesize
18.7MB

Download
memory/2836-8-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/2836-12-0x0000000004370000-0x0000000005617000-memory.dmp

Filesize
18.7MB

Download
memory/2836-18-0x0000000004370000-0x0000000005617000-memory.dmp

Filesize
18.7MB

Download
memory/2836-17-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/3056-27-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/3056-40-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/3056-22-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/3056-23-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/3056-26-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/3056-19-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/3056-35-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/3056-38-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/3056-39-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/3056-20-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/3056-41-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/3056-42-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/3056-52-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/3056-53-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/3056-54-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/3056-55-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/3056-65-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads