stealc | 0fb249f0b6ea12a9a7e101f8e92cb6708b2c0fbf9de2ce0e88be4d84bf9b3482

General

Target

0fb249f0b6ea12a9a7e101f8e92cb6708b2c0fbf9de2ce0e88be4d84bf9b3482.exe
Size

1.7MB
MD5

d2a38a71e3577e4fbb4185b4ee935376
SHA1

77d2ddc8fe67a720b75fd4027d143018f8c08791
SHA256

0fb249f0b6ea12a9a7e101f8e92cb6708b2c0fbf9de2ce0e88be4d84bf9b3482
SHA512

3a8dd6797dda6732fff10f02951d940a41e9f3b435ce74dfa266c91c585245a16012f4925bf909932ad03bf7aa6098e4a4d09f1e39a9091541e7793f22c57529
SSDEEP

49152:J60SmMKCWrpP2g/NXrHTvOy3YuaqaI0THZqNPbmvrKLlDqKz:40sKCEPLRrHTG0aq6ZZklDXz

Score

10^/10

stealc discovery spyware stealer upx

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. 8 IoCs

resource	yara_rule
behavioral2/memory/3340-30-0x0000000000400000-0x0000000001A34000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/3340-32-0x0000000001C80000-0x0000000001D80000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/3340-77-0x0000000000400000-0x0000000001A34000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/3340-82-0x0000000000400000-0x0000000001A34000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/3340-90-0x0000000000400000-0x0000000001A34000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/3340-122-0x0000000000400000-0x0000000001A34000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/3340-135-0x0000000000400000-0x0000000001A34000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/3340-137-0x0000000000400000-0x0000000001A34000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs

Detect binaries embedding considerable number of cryptocurrency wallet browser extension IDs. 8 IoCs

resource	yara_rule
behavioral2/memory/3340-30-0x0000000000400000-0x0000000001A34000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/3340-32-0x0000000001C80000-0x0000000001D80000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/3340-77-0x0000000000400000-0x0000000001A34000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/3340-82-0x0000000000400000-0x0000000001A34000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/3340-90-0x0000000000400000-0x0000000001A34000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/3340-122-0x0000000000400000-0x0000000001A34000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/3340-135-0x0000000000400000-0x0000000001A34000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/3340-137-0x0000000000400000-0x0000000001A34000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs

Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 7 IoCs

resource	yara_rule
behavioral2/memory/3340-30-0x0000000000400000-0x0000000001A34000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/3340-77-0x0000000000400000-0x0000000001A34000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/3340-82-0x0000000000400000-0x0000000001A34000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/3340-90-0x0000000000400000-0x0000000001A34000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/3340-122-0x0000000000400000-0x0000000001A34000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/3340-135-0x0000000000400000-0x0000000001A34000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/3340-137-0x0000000000400000-0x0000000001A34000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral2/files/0x000b00000002311a-20.dat	UPX
behavioral2/memory/1432-25-0x0000000000400000-0x0000000000930000-memory.dmp	UPX
behavioral2/memory/1432-31-0x0000000000400000-0x0000000000930000-memory.dmp	UPX

Downloads MZ/PE file

Executes dropped EXE 2 IoCs

pid	Process
3340	syncUpd.exe
1432	BroomSetup.exe

Loads dropped DLL 4 IoCs

pid	Process
3464	0fb249f0b6ea12a9a7e101f8e92cb6708b2c0fbf9de2ce0e88be4d84bf9b3482.exe
3464	0fb249f0b6ea12a9a7e101f8e92cb6708b2c0fbf9de2ce0e88be4d84bf9b3482.exe
3340	syncUpd.exe
3340	syncUpd.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

UPX packed file 3 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/files/0x000b00000002311a-20.dat	upx
behavioral2/memory/1432-25-0x0000000000400000-0x0000000000930000-memory.dmp	upx
behavioral2/memory/1432-31-0x0000000000400000-0x0000000000930000-memory.dmp	upx

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
3608	3340	WerFault.exe	87

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

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
4820	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3340	syncUpd.exe
3340	syncUpd.exe
3340	syncUpd.exe
3340	syncUpd.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1432	BroomSetup.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3464 wrote to memory of 3340	3464	0fb249f0b6ea12a9a7e101f8e92cb6708b2c0fbf9de2ce0e88be4d84bf9b3482.exe	87
PID 3464 wrote to memory of 3340	3464	0fb249f0b6ea12a9a7e101f8e92cb6708b2c0fbf9de2ce0e88be4d84bf9b3482.exe	87
PID 3464 wrote to memory of 3340	3464	0fb249f0b6ea12a9a7e101f8e92cb6708b2c0fbf9de2ce0e88be4d84bf9b3482.exe	87
PID 3464 wrote to memory of 1432	3464	0fb249f0b6ea12a9a7e101f8e92cb6708b2c0fbf9de2ce0e88be4d84bf9b3482.exe	92
PID 3464 wrote to memory of 1432	3464	0fb249f0b6ea12a9a7e101f8e92cb6708b2c0fbf9de2ce0e88be4d84bf9b3482.exe	92
PID 3464 wrote to memory of 1432	3464	0fb249f0b6ea12a9a7e101f8e92cb6708b2c0fbf9de2ce0e88be4d84bf9b3482.exe	92
PID 1432 wrote to memory of 2836	1432	BroomSetup.exe	93
PID 1432 wrote to memory of 2836	1432	BroomSetup.exe	93
PID 1432 wrote to memory of 2836	1432	BroomSetup.exe	93
PID 2836 wrote to memory of 3936	2836	cmd.exe	95
PID 2836 wrote to memory of 3936	2836	cmd.exe	95
PID 2836 wrote to memory of 3936	2836	cmd.exe	95
PID 2836 wrote to memory of 4820	2836	cmd.exe	96
PID 2836 wrote to memory of 4820	2836	cmd.exe	96
PID 2836 wrote to memory of 4820	2836	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\0fb249f0b6ea12a9a7e101f8e92cb6708b2c0fbf9de2ce0e88be4d84bf9b3482.exe
"C:\Users\Admin\AppData\Local\Temp\0fb249f0b6ea12a9a7e101f8e92cb6708b2c0fbf9de2ce0e88be4d84bf9b3482.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:3464
- C:\Users\Admin\AppData\Local\Temp\syncUpd.exe
  C:\Users\Admin\AppData\Local\Temp\syncUpd.exe
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3340
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3340 -s 2308
    3⤵
    - Program crash
    PID:3608
- C:\Users\Admin\AppData\Local\Temp\BroomSetup.exe
  C:\Users\Admin\AppData\Local\Temp\BroomSetup.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1432
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\Temp\Task.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2836
  - - C:\Windows\SysWOW64\chcp.com
      chcp 1251
      4⤵
      PID:3936
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /tn "MalayamaraUpdate" /tr "'C:\Users\Admin\AppData\Local\Temp\Updater.exe'" /sc minute /mo 30 /F
      4⤵
      Creates scheduled task(s)
      PID:4820

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 3340 -ip 3340
1⤵
PID:2968

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

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

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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\BroomSetup.exe

Filesize
1.4MB

MD5
f9f9641fdcaf98411e54d15f630f3bdd

SHA1
6fc8d0ba7ac114fbd785500cea6c19d5816fe5aa

SHA256
3f2b2dd0d7db32b358d7b7b9d5adf4a4cd610ea769976d2f5fabcdf229ee2da5

SHA512
674fb47928e9ffadd909ddc22e42309caeabfa736a050ec81cf2422da2e632fd3e65da66b38a38be92e0a14be8839ccc381b91f02e949df38374c09b48c46ec5

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsy356A.tmp\INetC.dll

Filesize
21KB

MD5
2b342079303895c50af8040a91f30f71

SHA1
b11335e1cb8356d9c337cb89fe81d669a69de17e

SHA256
2d5d89025911e2e273f90f393624be4819641dbee1606de792362e442e54612f

SHA512
550452dadc86ecd205f40668894116790a456fe46e9985d68093d36cf32abf00edecb5c56ff0287464a0e819db7b3cc53926037a116de6c651332a7cc8035d47

Download Submit
C:\Users\Admin\AppData\Local\Temp\syncUpd.exe

Filesize
282KB

MD5
54e0220b6f9b4f8f64382b71c6033595

SHA1
1f599189588a7a174a6b8a4587ae0df5c15bdd6f

SHA256
47bccced008024236587fbe59d8419a52888f7b50b01cc6c7dc92101a0885607

SHA512
0c4e27554ee5a090f8e8e1fa0b901cc5cc90fb6f1a3fb68c4a991096d8ea53a07e452d1ad119b046107deffe34173b21a5ff2f0062b98ae9b23945ea05ad8708

Download Submit
C:\Users\Admin\AppData\Roaming\Temp\Task.bat

Filesize
128B

MD5
11bb3db51f701d4e42d3287f71a6a43e

SHA1
63a4ee82223be6a62d04bdfe40ef8ba91ae49a86

SHA256
6be22058abfb22b40a42fb003f86b89e204a83024c03eb82cd53e2a0a047c331

SHA512
907ad2c070cc1db89f43459a94d7f48985d939d749c9648b78572a266f0d3fde47813a129e9151dbf4a7d96d36f588172f57c88b8b947b56ed818d7d068abab2

Download Submit
memory/1432-31-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/1432-35-0x0000000000F30000-0x0000000000F31000-memory.dmp

Filesize
4KB

Download
memory/1432-25-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/1432-26-0x0000000000F30000-0x0000000000F31000-memory.dmp

Filesize
4KB

Download
memory/3340-32-0x0000000001C80000-0x0000000001D80000-memory.dmp

Filesize
1024KB

Download
memory/3340-30-0x0000000000400000-0x0000000001A34000-memory.dmp

Filesize
22.2MB

Download
memory/3340-38-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/3340-77-0x0000000000400000-0x0000000001A34000-memory.dmp

Filesize
22.2MB

Download
memory/3340-82-0x0000000000400000-0x0000000001A34000-memory.dmp

Filesize
22.2MB

Download
memory/3340-90-0x0000000000400000-0x0000000001A34000-memory.dmp

Filesize
22.2MB

Download
memory/3340-12-0x0000000000400000-0x0000000001A34000-memory.dmp

Filesize
22.2MB

Download
memory/3340-11-0x0000000003640000-0x0000000003667000-memory.dmp

Filesize
156KB

Download
memory/3340-122-0x0000000000400000-0x0000000001A34000-memory.dmp

Filesize
22.2MB

Download
memory/3340-10-0x0000000001C80000-0x0000000001D80000-memory.dmp

Filesize
1024KB

Download
memory/3340-135-0x0000000000400000-0x0000000001A34000-memory.dmp

Filesize
22.2MB

Download
memory/3340-137-0x0000000000400000-0x0000000001A34000-memory.dmp

Filesize
22.2MB

Download
memory/3464-24-0x0000000000400000-0x000000000043E000-memory.dmp

Filesize
248KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads