stealc | 566c85bb48d0fdb38be0ec06f7093eb12a15b8f6b422769c77850951859baee8

General

Target

566c85bb48d0fdb38be0ec06f7093eb12a15b8f6b422769c77850951859baee8.exe
Size

416KB
MD5

05ab1b8383cb41c0a7a2bb1430963ffa
SHA1

47bdaf9128bfb534cf07d21dbb70da0acd73b7fe
SHA256

566c85bb48d0fdb38be0ec06f7093eb12a15b8f6b422769c77850951859baee8
SHA512

4e84251d9e0c5df2d972881715ee42696cc1dc3e8b80b3e6c4d029a5992cde5e9eb6e20051ed45662bd5b92705a459c6df1bf77a16b49676cbc34623c6d0eea8
SSDEEP

6144:4GNMZHV3J8HAzx1A1oPfAAIhpC3OHf8BuLRbGst7/:rMhVZ24S1iAzpjHf8ByRp/

Score

10^/10

stealc discovery spyware stealer

Malware Config

Extracted

Family

stealc

C2

http://185.172.128.150

Attributes

url_path
/c698e1bc8a2f5e6d.php

Signatures

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

Executes dropped EXE 1 IoCs

pid	Process
3512	u3k8.0.exe

Loads dropped DLL 2 IoCs

pid	Process
3512	u3k8.0.exe
3512	u3k8.0.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
1856	3512	WerFault.exe	81

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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u3k8.0.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	u3k8.0.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3512	u3k8.0.exe
3512	u3k8.0.exe
3512	u3k8.0.exe
3512	u3k8.0.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4616 wrote to memory of 3512	4616	566c85bb48d0fdb38be0ec06f7093eb12a15b8f6b422769c77850951859baee8.exe	81
PID 4616 wrote to memory of 3512	4616	566c85bb48d0fdb38be0ec06f7093eb12a15b8f6b422769c77850951859baee8.exe	81
PID 4616 wrote to memory of 3512	4616	566c85bb48d0fdb38be0ec06f7093eb12a15b8f6b422769c77850951859baee8.exe	81

C:\Users\Admin\AppData\Local\Temp\566c85bb48d0fdb38be0ec06f7093eb12a15b8f6b422769c77850951859baee8.exe
"C:\Users\Admin\AppData\Local\Temp\566c85bb48d0fdb38be0ec06f7093eb12a15b8f6b422769c77850951859baee8.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4616
- C:\Users\Admin\AppData\Local\Temp\u3k8.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u3k8.0.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3512
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3512 -s 2460
    3⤵
    - Program crash
    PID:1856

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 3512 -ip 3512
1⤵
PID:1852

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
C:\Users\Admin\AppData\Local\Temp\u3k8.0.exe

Filesize
274KB

MD5
72650f024358627e959b3e486b30471e

SHA1
ff2dd1495fa40008354f3f5b16a51125dc6a56fe

SHA256
5d0d85b7fa9992568b57bc90e3e4407d6903388623b7cae8683d04a2c46a62d2

SHA512
5f55f6707df28ea668f9edbaf0039ff48acf1f42728ef7dfb455f2e97a757dd7781e962cc6a83070602e0ab3384219bc39832b7af28db2ac8307f5027c9b2aa3

Download Submit
memory/3512-14-0x0000000000400000-0x0000000002B02000-memory.dmp

Filesize
39.0MB

Download
memory/3512-77-0x0000000000400000-0x0000000002B02000-memory.dmp

Filesize
39.0MB

Download
memory/3512-15-0x0000000000400000-0x0000000002B02000-memory.dmp

Filesize
39.0MB

Download
memory/3512-16-0x0000000000400000-0x0000000002B02000-memory.dmp

Filesize
39.0MB

Download
memory/3512-18-0x0000000000400000-0x0000000002B02000-memory.dmp

Filesize
39.0MB

Download
memory/3512-20-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/3512-116-0x0000000000400000-0x0000000002B02000-memory.dmp

Filesize
39.0MB

Download
memory/3512-106-0x0000000000400000-0x0000000002B02000-memory.dmp

Filesize
39.0MB

Download
memory/3512-54-0x0000000000400000-0x0000000002B02000-memory.dmp

Filesize
39.0MB

Download
memory/4616-56-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/4616-1-0x0000000002DA0000-0x0000000002EA0000-memory.dmp

Filesize
1024KB

Download
memory/4616-13-0x0000000000400000-0x0000000002B25000-memory.dmp

Filesize
39.1MB

Download
memory/4616-3-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/4616-55-0x00000000030A0000-0x000000000310C000-memory.dmp

Filesize
432KB

Download
memory/4616-2-0x00000000030A0000-0x000000000310C000-memory.dmp

Filesize
432KB

Download
memory/4616-52-0x0000000002DA0000-0x0000000002EA0000-memory.dmp

Filesize
1024KB

Download

Analysis

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