stealc | 1583d884c1cfc6da3574a148912647eb1936a0031c45c9ed05e58d7f138c70a6

General

Target

15539a353d5b7e18b87b30f717454dc25c4261954d97af791596ea49acb1fa92.exe
Size

291KB
MD5

8cca6d631010620a368ddc7925c0649c
SHA1

cbac7cdb0b393a64a25726c09c718616e83ffa8f
SHA256

15539a353d5b7e18b87b30f717454dc25c4261954d97af791596ea49acb1fa92
SHA512

4c38a618668d2fe78ee950aaadd4f32d7f4ff3130039efefb1e039bc79aeedb2e065141fdd96d4255735ffb68a991b83e0d4609e02a76a958c99feda4f24135c
SSDEEP

3072:2D2H6X9LmnZiTw5aX/ifwSYt3pkki/c9yEh+vp5nbrSLJhCe:MX9LmnMTlX/iYSYPkR/cWvzvohC

Score

10^/10

stealc discovery spyware stealer

Malware Config

Extracted

Family

stealc

C2

http://45.87.154.30

Signatures

Detects Stealc stealer 1 IoCs

stealer

resource	yara_rule
behavioral2/memory/3332-184-0x0000000000400000-0x0000000002AF9000-memory.dmp	family_stealc

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Downloads MZ/PE file

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation	15539a353d5b7e18b87b30f717454dc25c4261954d97af791596ea49acb1fa92.exe

Loads dropped DLL 2 IoCs

pid	Process
3332	15539a353d5b7e18b87b30f717454dc25c4261954d97af791596ea49acb1fa92.exe
3332	15539a353d5b7e18b87b30f717454dc25c4261954d97af791596ea49acb1fa92.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
T1081
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1848	3332	WerFault.exe	85

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	15539a353d5b7e18b87b30f717454dc25c4261954d97af791596ea49acb1fa92.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	15539a353d5b7e18b87b30f717454dc25c4261954d97af791596ea49acb1fa92.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1244	timeout.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3332	15539a353d5b7e18b87b30f717454dc25c4261954d97af791596ea49acb1fa92.exe
3332	15539a353d5b7e18b87b30f717454dc25c4261954d97af791596ea49acb1fa92.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3332 wrote to memory of 2528	3332	15539a353d5b7e18b87b30f717454dc25c4261954d97af791596ea49acb1fa92.exe	87
PID 3332 wrote to memory of 2528	3332	15539a353d5b7e18b87b30f717454dc25c4261954d97af791596ea49acb1fa92.exe	87
PID 3332 wrote to memory of 2528	3332	15539a353d5b7e18b87b30f717454dc25c4261954d97af791596ea49acb1fa92.exe	87
PID 2528 wrote to memory of 1244	2528	cmd.exe	90
PID 2528 wrote to memory of 1244	2528	cmd.exe	90
PID 2528 wrote to memory of 1244	2528	cmd.exe	90

C:\Users\Admin\AppData\Local\Temp\15539a353d5b7e18b87b30f717454dc25c4261954d97af791596ea49acb1fa92.exe
"C:\Users\Admin\AppData\Local\Temp\15539a353d5b7e18b87b30f717454dc25c4261954d97af791596ea49acb1fa92.exe"
1⤵
- Checks computer location settings
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3332
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\15539a353d5b7e18b87b30f717454dc25c4261954d97af791596ea49acb1fa92.exe" & del "C:\ProgramData\*.dll"" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2528
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:1244
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3332 -s 1972
  2⤵
  - Program crash
  PID:1848

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 3332 -ip 3332
1⤵
PID:5016

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

2

T1081

Discovery

Query Registry

3

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\mozglue.dll

Filesize
593KB

MD5
c8fd9be83bc728cc04beffafc2907fe9

SHA1
95ab9f701e0024cedfbd312bcfe4e726744c4f2e

SHA256
ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

SHA512
fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

Download Submit
C:\ProgramData\mozglue.dll

Filesize
593KB

MD5
c8fd9be83bc728cc04beffafc2907fe9

SHA1
95ab9f701e0024cedfbd312bcfe4e726744c4f2e

SHA256
ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

SHA512
fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

Download Submit
C:\ProgramData\nss3.dll

Filesize
2.0MB

MD5
1cc453cdf74f31e4d913ff9c10acdde2

SHA1
6e85eae544d6e965f15fa5c39700fa7202f3aafe

SHA256
ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

SHA512
dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

Download Submit
memory/3332-134-0x0000000004830000-0x0000000004845000-memory.dmp

Filesize
84KB

Download
memory/3332-135-0x0000000000400000-0x0000000002AF9000-memory.dmp

Filesize
39.0MB

Download
memory/3332-137-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/3332-184-0x0000000000400000-0x0000000002AF9000-memory.dmp

Filesize
39.0MB

Download
memory/3332-206-0x0000000000400000-0x0000000002AF9000-memory.dmp

Filesize
39.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads