33432b5afe2b957373a0c84a40b6a8154e40192e38e173a7059bfde3d684463e

General

Target

33432b5afe2b957373a0c84a40b6a8154e40192e38e173a7059bfde3d684463e.exe
Size

211KB
MD5

45201c2b39cd2f3e59648b45dbe69b83
SHA1

d78d66b57bb25989ed8b9b5c5488b80ff81226ee
SHA256

33432b5afe2b957373a0c84a40b6a8154e40192e38e173a7059bfde3d684463e
SHA512

1012285bb6de50dd287791faf487337705b9638d59ece79501533fcfe2493fed8bf117cd19cd28ab787bd732209d515d80c62caacd1abb7d514aef6443099d7e
SSDEEP

3072:EPUHpiKT2t2UHIu05W7SAFJJOUD9cckiKop97f3r8n9t9YgntA:9rTfUHeeSKOS9ccFKk3Y9t9YR

Score

9^/10

Malware Config

Signatures

UPX dump on OEP (original entry point) 18 IoCs

resource	yara_rule
behavioral1/files/0x000800000001225f-6.dat	UPX
behavioral1/memory/624-8-0x0000000000400000-0x00000000016A8000-memory.dmp	UPX
behavioral1/memory/2660-13-0x0000000000400000-0x00000000016A8000-memory.dmp	UPX
behavioral1/memory/624-12-0x0000000000400000-0x00000000016A8000-memory.dmp	UPX
behavioral1/memory/2660-16-0x0000000000400000-0x00000000016A8000-memory.dmp	UPX
behavioral1/memory/2660-17-0x0000000000400000-0x00000000016A8000-memory.dmp	UPX
behavioral1/memory/2660-18-0x0000000000400000-0x00000000016A8000-memory.dmp	UPX
behavioral1/memory/2660-21-0x0000000000400000-0x00000000016A8000-memory.dmp	UPX
behavioral1/memory/2660-28-0x0000000000400000-0x00000000016A8000-memory.dmp	UPX
behavioral1/memory/2660-29-0x0000000000400000-0x00000000016A8000-memory.dmp	UPX
behavioral1/memory/2660-37-0x0000000000400000-0x00000000016A8000-memory.dmp	UPX
behavioral1/memory/2660-38-0x0000000000400000-0x00000000016A8000-memory.dmp	UPX
behavioral1/memory/2660-44-0x0000000000400000-0x00000000016A8000-memory.dmp	UPX
behavioral1/memory/2660-45-0x0000000000400000-0x00000000016A8000-memory.dmp	UPX
behavioral1/memory/2660-50-0x0000000000400000-0x00000000016A8000-memory.dmp	UPX
behavioral1/memory/2660-55-0x0000000000400000-0x00000000016A8000-memory.dmp	UPX
behavioral1/memory/2660-63-0x0000000000400000-0x00000000016A8000-memory.dmp	UPX
behavioral1/memory/2660-64-0x0000000000400000-0x00000000016A8000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2660	Isass.exe

Loads dropped DLL 2 IoCs

pid	Process
624	33432b5afe2b957373a0c84a40b6a8154e40192e38e173a7059bfde3d684463e.exe
624	33432b5afe2b957373a0c84a40b6a8154e40192e38e173a7059bfde3d684463e.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-1-5-21-1658372521-4246568289-2509113762-1000\Software\Microsoft\Windows\CurrentVersion\Run\Isass.exe = "C:\\Users\\Public\\Microsoft Build\\Isass.exe"	33432b5afe2b957373a0c84a40b6a8154e40192e38e173a7059bfde3d684463e.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Isass.exe = "C:\\Users\\Public\\Microsoft Build\\Isass.exe"	33432b5afe2b957373a0c84a40b6a8154e40192e38e173a7059bfde3d684463e.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
624	33432b5afe2b957373a0c84a40b6a8154e40192e38e173a7059bfde3d684463e.exe
2660	Isass.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 624 wrote to memory of 2660	624	33432b5afe2b957373a0c84a40b6a8154e40192e38e173a7059bfde3d684463e.exe	28
PID 624 wrote to memory of 2660	624	33432b5afe2b957373a0c84a40b6a8154e40192e38e173a7059bfde3d684463e.exe	28
PID 624 wrote to memory of 2660	624	33432b5afe2b957373a0c84a40b6a8154e40192e38e173a7059bfde3d684463e.exe	28
PID 624 wrote to memory of 2660	624	33432b5afe2b957373a0c84a40b6a8154e40192e38e173a7059bfde3d684463e.exe	28

C:\Users\Admin\AppData\Local\Temp\33432b5afe2b957373a0c84a40b6a8154e40192e38e173a7059bfde3d684463e.exe
"C:\Users\Admin\AppData\Local\Temp\33432b5afe2b957373a0c84a40b6a8154e40192e38e173a7059bfde3d684463e.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:624
- C:\Users\Public\Microsoft Build\Isass.exe
  "C:\Users\Public\Microsoft Build\Isass.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  PID:2660

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

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
211KB

MD5
45201c2b39cd2f3e59648b45dbe69b83

SHA1
d78d66b57bb25989ed8b9b5c5488b80ff81226ee

SHA256
33432b5afe2b957373a0c84a40b6a8154e40192e38e173a7059bfde3d684463e

SHA512
1012285bb6de50dd287791faf487337705b9638d59ece79501533fcfe2493fed8bf117cd19cd28ab787bd732209d515d80c62caacd1abb7d514aef6443099d7e

Download Submit
memory/624-14-0x00000000003B0000-0x00000000003B1000-memory.dmp

Filesize
4KB

Download
memory/624-8-0x0000000000400000-0x00000000016A8000-memory.dmp

Filesize
18.7MB

Download
memory/624-9-0x0000000004130000-0x00000000053D8000-memory.dmp

Filesize
18.7MB

Download
memory/624-11-0x0000000004130000-0x00000000053D8000-memory.dmp

Filesize
18.7MB

Download
memory/624-12-0x0000000000400000-0x00000000016A8000-memory.dmp

Filesize
18.7MB

Download
memory/2660-28-0x0000000000400000-0x00000000016A8000-memory.dmp

Filesize
18.7MB

Download
memory/2660-38-0x0000000000400000-0x00000000016A8000-memory.dmp

Filesize
18.7MB

Download
memory/2660-16-0x0000000000400000-0x00000000016A8000-memory.dmp

Filesize
18.7MB

Download
memory/2660-17-0x0000000000400000-0x00000000016A8000-memory.dmp

Filesize
18.7MB

Download
memory/2660-18-0x0000000000400000-0x00000000016A8000-memory.dmp

Filesize
18.7MB

Download
memory/2660-21-0x0000000000400000-0x00000000016A8000-memory.dmp

Filesize
18.7MB

Download
memory/2660-13-0x0000000000400000-0x00000000016A8000-memory.dmp

Filesize
18.7MB

Download
memory/2660-29-0x0000000000400000-0x00000000016A8000-memory.dmp

Filesize
18.7MB

Download
memory/2660-37-0x0000000000400000-0x00000000016A8000-memory.dmp

Filesize
18.7MB

Download
memory/2660-15-0x00000000003F0000-0x00000000003F1000-memory.dmp

Filesize
4KB

Download
memory/2660-44-0x0000000000400000-0x00000000016A8000-memory.dmp

Filesize
18.7MB

Download
memory/2660-45-0x0000000000400000-0x00000000016A8000-memory.dmp

Filesize
18.7MB

Download
memory/2660-50-0x0000000000400000-0x00000000016A8000-memory.dmp

Filesize
18.7MB

Download
memory/2660-53-0x0000000004100000-0x00000000053A8000-memory.dmp

Filesize
18.7MB

Download
memory/2660-54-0x0000000004100000-0x00000000053A8000-memory.dmp

Filesize
18.7MB

Download
memory/2660-55-0x0000000000400000-0x00000000016A8000-memory.dmp

Filesize
18.7MB

Download
memory/2660-63-0x0000000000400000-0x00000000016A8000-memory.dmp

Filesize
18.7MB

Download
memory/2660-64-0x0000000000400000-0x00000000016A8000-memory.dmp

Filesize
18.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads