stealc | f77202c029e5db1f7f2a29f2735aba8d40a13b0977c961c5a6133db203c136d8

General

Target

f77202c029e5db1f7f2a29f2735aba8d40a13b0977c961c5a6133db203c136d8.exe
Size

309KB
MD5

4a32f1505531a4e8c7abe06ca57e3a41
SHA1

665204495b3a36b1ec00d22f62eff25c43937063
SHA256

f77202c029e5db1f7f2a29f2735aba8d40a13b0977c961c5a6133db203c136d8
SHA512

77f4f2fa53481c84540964ed4d2ce0c1f6759833a15c15d45bf978ef2d7be29f3c331f7ea3da9b1363032688559cb26da9241e5b916cabc8c6ef463b1557e6be
SSDEEP

3072:P5LgPWwhiseEAoheWFwKF4IIGEBLPOaQi0QabtSJ5RLBSiXs2rswriYwridCzGdL:BL+WwhD2riIZLV0QoxEsw3wjzGsXA

Score

10^/10

stealc default12 discovery spyware stealer

Malware Config

Extracted

Family

stealc

Botnet

default12

C2

http://185.172.128.170

Attributes

url_path
/7043a0c6a68d9c65.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/4372-93-0x0000000000400000-0x0000000001BC7000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/4372-94-0x0000000000400000-0x000000000063B000-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/4372-93-0x0000000000400000-0x0000000001BC7000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/4372-94-0x0000000000400000-0x000000000063B000-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/4372-93-0x0000000000400000-0x0000000001BC7000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/4372-94-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers

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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	f77202c029e5db1f7f2a29f2735aba8d40a13b0977c961c5a6133db203c136d8.exe

Executes dropped EXE 1 IoCs

pid	Process
1860	KEGIDHJKKJ.exe

Loads dropped DLL 2 IoCs

pid	Process
4372	f77202c029e5db1f7f2a29f2735aba8d40a13b0977c961c5a6133db203c136d8.exe
4372	f77202c029e5db1f7f2a29f2735aba8d40a13b0977c961c5a6133db203c136d8.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
2312	4372	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 opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	f77202c029e5db1f7f2a29f2735aba8d40a13b0977c961c5a6133db203c136d8.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	f77202c029e5db1f7f2a29f2735aba8d40a13b0977c961c5a6133db203c136d8.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4372	f77202c029e5db1f7f2a29f2735aba8d40a13b0977c961c5a6133db203c136d8.exe
4372	f77202c029e5db1f7f2a29f2735aba8d40a13b0977c961c5a6133db203c136d8.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4372 wrote to memory of 1836	4372	f77202c029e5db1f7f2a29f2735aba8d40a13b0977c961c5a6133db203c136d8.exe	93
PID 4372 wrote to memory of 1836	4372	f77202c029e5db1f7f2a29f2735aba8d40a13b0977c961c5a6133db203c136d8.exe	93
PID 4372 wrote to memory of 1836	4372	f77202c029e5db1f7f2a29f2735aba8d40a13b0977c961c5a6133db203c136d8.exe	93
PID 1836 wrote to memory of 1860	1836	cmd.exe	97
PID 1836 wrote to memory of 1860	1836	cmd.exe	97
PID 1836 wrote to memory of 1860	1836	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\f77202c029e5db1f7f2a29f2735aba8d40a13b0977c961c5a6133db203c136d8.exe
"C:\Users\Admin\AppData\Local\Temp\f77202c029e5db1f7f2a29f2735aba8d40a13b0977c961c5a6133db203c136d8.exe"
1⤵
- Checks computer location settings
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4372
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\KEGIDHJKKJ.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1836
- - C:\Users\Admin\AppData\Local\Temp\KEGIDHJKKJ.exe
    "C:\Users\Admin\AppData\Local\Temp\KEGIDHJKKJ.exe"
    3⤵
    - Executes dropped EXE
    PID:1860
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4372 -s 2372
  2⤵
  - Program crash
  PID:2312

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4372 -ip 4372
1⤵
PID:1984

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

3

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Data from Local System

3

T1005

Command and Control

Exfiltration

Impact

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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\KEGIDHJKKJ.exe

Filesize
533KB

MD5
6c93fc68e2f01c20fb81af24470b790c

SHA1
d5927b38a32e30afcf5a658612a8266476fc4ad8

SHA256
64a71b664d76641b35dac312161cb356b3b3b5f0b45c9d88c8afa547b4902580

SHA512
355e9677121ef17cf8c398f0c17399776d206c62014080a2c62682e1152ea0729dcc6e233358dcd6bae009b07e3db936d4b18eb37d6e7ebc2fe9cf8d827c4ade

Download Submit
memory/4372-2-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/4372-1-0x0000000001C10000-0x0000000001D10000-memory.dmp

Filesize
1024KB

Download
memory/4372-3-0x0000000000400000-0x0000000001BC7000-memory.dmp

Filesize
23.8MB

Download
memory/4372-4-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/4372-93-0x0000000000400000-0x0000000001BC7000-memory.dmp

Filesize
23.8MB

Download
memory/4372-94-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads