stealc | 4cbc69704efc2c428fd13988476430c8ec7e105e56b10c07bff1afa5d8d99c69

General

Target

4cbc69704efc2c428fd13988476430c8ec7e105e56b10c07bff1afa5d8d99c69.exe
Size

181KB
MD5

22b5a513db4af9a232bf0529704e2449
SHA1

f59317dec43682e7ccf5db0d6d8a6465b27ee964
SHA256

4cbc69704efc2c428fd13988476430c8ec7e105e56b10c07bff1afa5d8d99c69
SHA512

5c91d72da0ed761789b08a7d0868bac0298ee991e4e0d72efed77d2ef3c43ff92e6a0c7ec77e0e977ce4aef1632fac018cc5ebd1707a1784af15eb123e8765f7
SSDEEP

3072:l+1s6SOYKwGwJbgrWFSQf4Yoeelc4C7lB9YUrzG19T:QTTYdVAW1f4YQ7C7lBZ6

Score

10^/10

stealc discovery spyware stealer

Malware Config

Extracted

Family

stealc

C2

http://185.172.128.145

Attributes

url_path
/3cd2b41cbde8fc9c.php

Signatures

Stealc
Stealc is an infostealer written in C++.
stealer stealc

Detect binaries embedding considerable number of MFA browser extension IDs. 2 IoCs

resource	yara_rule
behavioral2/memory/1744-75-0x0000000000400000-0x0000000000823000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/1744-89-0x0000000000400000-0x0000000000823000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs

Detect binaries embedding considerable number of cryptocurrency wallet browser extension IDs. 2 IoCs

resource	yara_rule
behavioral2/memory/1744-75-0x0000000000400000-0x0000000000823000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/1744-89-0x0000000000400000-0x0000000000823000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs

Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 2 IoCs

resource	yara_rule
behavioral2/memory/1744-75-0x0000000000400000-0x0000000000823000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/1744-89-0x0000000000400000-0x0000000000823000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
1744	4cbc69704efc2c428fd13988476430c8ec7e105e56b10c07bff1afa5d8d99c69.exe
1744	4cbc69704efc2c428fd13988476430c8ec7e105e56b10c07bff1afa5d8d99c69.exe

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
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
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials In Files
T1552.001
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).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4836	1744	WerFault.exe	83

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	4cbc69704efc2c428fd13988476430c8ec7e105e56b10c07bff1afa5d8d99c69.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	4cbc69704efc2c428fd13988476430c8ec7e105e56b10c07bff1afa5d8d99c69.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1744	4cbc69704efc2c428fd13988476430c8ec7e105e56b10c07bff1afa5d8d99c69.exe
1744	4cbc69704efc2c428fd13988476430c8ec7e105e56b10c07bff1afa5d8d99c69.exe
1744	4cbc69704efc2c428fd13988476430c8ec7e105e56b10c07bff1afa5d8d99c69.exe
1744	4cbc69704efc2c428fd13988476430c8ec7e105e56b10c07bff1afa5d8d99c69.exe

C:\Users\Admin\AppData\Local\Temp\4cbc69704efc2c428fd13988476430c8ec7e105e56b10c07bff1afa5d8d99c69.exe
"C:\Users\Admin\AppData\Local\Temp\4cbc69704efc2c428fd13988476430c8ec7e105e56b10c07bff1afa5d8d99c69.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:1744
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1744 -s 2320
  2⤵
  - Program crash
  PID:4836

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1744 -ip 1744
1⤵
PID:4120

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

3

T1552

Credentials In Files

3

T1552.001

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

3

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\Are.docx

Filesize
11KB

MD5
a33e5b189842c5867f46566bdbf7a095

SHA1
e1c06359f6a76da90d19e8fd95e79c832edb3196

SHA256
5abf8e3d1f78de7b09d7f6fb87f9e80e60caacf13ef3c1289665653dacd7c454

SHA512
f2ad3812ec9b915e9618539b0f103f2e9acaad25fbbacd84941c954ce070af231324e83a4621e951c1dbae8d40d50410954e40dd52bbd46e34c54b0d1957407b

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/1744-1-0x0000000000850000-0x0000000000950000-memory.dmp

Filesize
1024KB

Download
memory/1744-2-0x0000000002570000-0x00000000025A4000-memory.dmp

Filesize
208KB

Download
memory/1744-3-0x0000000000400000-0x0000000000823000-memory.dmp

Filesize
4.1MB

Download
memory/1744-4-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/1744-75-0x0000000000400000-0x0000000000823000-memory.dmp

Filesize
4.1MB

Download
memory/1744-89-0x0000000000400000-0x0000000000823000-memory.dmp

Filesize
4.1MB

Download

Analysis

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