stealc | 7373e0bd6ebe13f63c61ddbe376372d161b95cc0f410cc7766b0786e4642bebc

General

Target

7373e0bd6ebe13f63c61ddbe376372d161b95cc0f410cc7766b0786e4642bebc.exe
Size

2.0MB
MD5

435e0bd30d4957fa489f504948603d8d
SHA1

4d5df55d4227743fb564b0df1a195c3c0ac3bf56
SHA256

7373e0bd6ebe13f63c61ddbe376372d161b95cc0f410cc7766b0786e4642bebc
SHA512

e6ca8e1c70223d408015519c033ae72cf5b8f8355b4f635aa19a7e77ecd8bdae1954cb15b9964a92472e73c39d36f05d24c7152c2b290eb09bd027e554ba7a73
SSDEEP

49152:LHfava82599Gyh7/PhmhGvMw9f2lzs5tG7fSsGy:DfavX25Vh7ASMwl2lItG7fgy

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. 6 IoCs

resource	yara_rule
behavioral1/memory/2308-44-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral1/memory/2308-88-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral1/memory/2308-99-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral1/memory/2308-106-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral1/memory/2308-126-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral1/memory/2308-138-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs

Detect binaries embedding considerable number of cryptocurrency wallet browser extension IDs. 6 IoCs

resource	yara_rule
behavioral1/memory/2308-44-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral1/memory/2308-88-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral1/memory/2308-99-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral1/memory/2308-106-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral1/memory/2308-126-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral1/memory/2308-138-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs

Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 6 IoCs

resource	yara_rule
behavioral1/memory/2308-44-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral1/memory/2308-88-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral1/memory/2308-99-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral1/memory/2308-106-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral1/memory/2308-126-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral1/memory/2308-138-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral1/files/0x0008000000014983-24.dat	UPX
behavioral1/memory/2632-34-0x0000000000400000-0x0000000000930000-memory.dmp	UPX
behavioral1/memory/2632-45-0x0000000000400000-0x0000000000930000-memory.dmp	UPX

Downloads MZ/PE file

Executes dropped EXE 2 IoCs

pid	Process
2308	syncUpd.exe
2632	BroomSetup.exe

Loads dropped DLL 7 IoCs

pid	Process
2240	7373e0bd6ebe13f63c61ddbe376372d161b95cc0f410cc7766b0786e4642bebc.exe
2240	7373e0bd6ebe13f63c61ddbe376372d161b95cc0f410cc7766b0786e4642bebc.exe
2240	7373e0bd6ebe13f63c61ddbe376372d161b95cc0f410cc7766b0786e4642bebc.exe
2240	7373e0bd6ebe13f63c61ddbe376372d161b95cc0f410cc7766b0786e4642bebc.exe
2240	7373e0bd6ebe13f63c61ddbe376372d161b95cc0f410cc7766b0786e4642bebc.exe
2308	syncUpd.exe
2308	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
behavioral1/files/0x0008000000014983-24.dat	upx
behavioral1/memory/2632-34-0x0000000000400000-0x0000000000930000-memory.dmp	upx
behavioral1/memory/2632-45-0x0000000000400000-0x0000000000930000-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

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
784	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2308	syncUpd.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2632	BroomSetup.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2240 wrote to memory of 2308	2240	7373e0bd6ebe13f63c61ddbe376372d161b95cc0f410cc7766b0786e4642bebc.exe	28
PID 2240 wrote to memory of 2308	2240	7373e0bd6ebe13f63c61ddbe376372d161b95cc0f410cc7766b0786e4642bebc.exe	28
PID 2240 wrote to memory of 2308	2240	7373e0bd6ebe13f63c61ddbe376372d161b95cc0f410cc7766b0786e4642bebc.exe	28
PID 2240 wrote to memory of 2308	2240	7373e0bd6ebe13f63c61ddbe376372d161b95cc0f410cc7766b0786e4642bebc.exe	28
PID 2240 wrote to memory of 2632	2240	7373e0bd6ebe13f63c61ddbe376372d161b95cc0f410cc7766b0786e4642bebc.exe	29
PID 2240 wrote to memory of 2632	2240	7373e0bd6ebe13f63c61ddbe376372d161b95cc0f410cc7766b0786e4642bebc.exe	29
PID 2240 wrote to memory of 2632	2240	7373e0bd6ebe13f63c61ddbe376372d161b95cc0f410cc7766b0786e4642bebc.exe	29
PID 2240 wrote to memory of 2632	2240	7373e0bd6ebe13f63c61ddbe376372d161b95cc0f410cc7766b0786e4642bebc.exe	29
PID 2240 wrote to memory of 2632	2240	7373e0bd6ebe13f63c61ddbe376372d161b95cc0f410cc7766b0786e4642bebc.exe	29
PID 2240 wrote to memory of 2632	2240	7373e0bd6ebe13f63c61ddbe376372d161b95cc0f410cc7766b0786e4642bebc.exe	29
PID 2240 wrote to memory of 2632	2240	7373e0bd6ebe13f63c61ddbe376372d161b95cc0f410cc7766b0786e4642bebc.exe	29
PID 2632 wrote to memory of 2444	2632	BroomSetup.exe	31
PID 2632 wrote to memory of 2444	2632	BroomSetup.exe	31
PID 2632 wrote to memory of 2444	2632	BroomSetup.exe	31
PID 2632 wrote to memory of 2444	2632	BroomSetup.exe	31
PID 2444 wrote to memory of 1592	2444	cmd.exe	33
PID 2444 wrote to memory of 1592	2444	cmd.exe	33
PID 2444 wrote to memory of 1592	2444	cmd.exe	33
PID 2444 wrote to memory of 1592	2444	cmd.exe	33
PID 2444 wrote to memory of 784	2444	cmd.exe	34
PID 2444 wrote to memory of 784	2444	cmd.exe	34
PID 2444 wrote to memory of 784	2444	cmd.exe	34
PID 2444 wrote to memory of 784	2444	cmd.exe	34

C:\Users\Admin\AppData\Local\Temp\7373e0bd6ebe13f63c61ddbe376372d161b95cc0f410cc7766b0786e4642bebc.exe
"C:\Users\Admin\AppData\Local\Temp\7373e0bd6ebe13f63c61ddbe376372d161b95cc0f410cc7766b0786e4642bebc.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2240
- 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:2308
- 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:2632
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Roaming\Temp\Task.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2444
  - - C:\Windows\SysWOW64\chcp.com
      chcp 1251
      4⤵
      PID:1592
  - - 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:784

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:\Users\Admin\AppData\Roaming\Temp\Task.bat

Filesize
128B

MD5
11bb3db51f701d4e42d3287f71a6a43e

SHA1
63a4ee82223be6a62d04bdfe40ef8ba91ae49a86

SHA256
6be22058abfb22b40a42fb003f86b89e204a83024c03eb82cd53e2a0a047c331

SHA512
907ad2c070cc1db89f43459a94d7f48985d939d749c9648b78572a266f0d3fde47813a129e9151dbf4a7d96d36f588172f57c88b8b947b56ed818d7d068abab2

Download Submit
\ProgramData\mozglue.dll

Filesize
593KB

MD5
c8fd9be83bc728cc04beffafc2907fe9

SHA1
95ab9f701e0024cedfbd312bcfe4e726744c4f2e

SHA256
ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

SHA512
fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

Download Submit
\ProgramData\nss3.dll

Filesize
2.0MB

MD5
1cc453cdf74f31e4d913ff9c10acdde2

SHA1
6e85eae544d6e965f15fa5c39700fa7202f3aafe

SHA256
ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

SHA512
dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

Download Submit
\Users\Admin\AppData\Local\Temp\BroomSetup.exe

Filesize
1.7MB

MD5
eee5ddcffbed16222cac0a1b4e2e466e

SHA1
28b40c88b8ea50b0782e2bcbb4cc0f411035f3d5

SHA256
2a40e5dccc7526c4982334941c90f95374460e2a816e84e724e98c4d52ae8c54

SHA512
8f88901f3ebd425818db09f268df19ccf8a755603f04e9481bcf02b112a84393f8a900ead77f8f971bfa33fd9fa5636b7494aaee864a0fb04e3273911a4216dc

Download Submit
\Users\Admin\AppData\Local\Temp\nsyD8A.tmp\INetC.dll

Filesize
21KB

MD5
2b342079303895c50af8040a91f30f71

SHA1
b11335e1cb8356d9c337cb89fe81d669a69de17e

SHA256
2d5d89025911e2e273f90f393624be4819641dbee1606de792362e442e54612f

SHA512
550452dadc86ecd205f40668894116790a456fe46e9985d68093d36cf32abf00edecb5c56ff0287464a0e819db7b3cc53926037a116de6c651332a7cc8035d47

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

Filesize
200KB

MD5
c722591f624fb69970f246b8c81d830f

SHA1
85516decea5d6987bebe39cbadf36053beaf4bb0

SHA256
13cd1152a19fdac6581cac2bd822f34bd3026ea1783ff231e299b6d28c046a6a

SHA512
822584c5c8a0813af4d845e80919776c71a43464ab719d1c303ebaae6a8ed47763183566bedc9be2e8c44de8ee6fd62d1e12be471e5d5c73ae4b1dcdaa34a908

Download Submit
memory/2240-33-0x00000000057E0000-0x0000000005D10000-memory.dmp

Filesize
5.2MB

Download
memory/2240-30-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/2308-59-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/2308-106-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2308-138-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2308-44-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2308-126-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2308-47-0x0000000000760000-0x0000000000860000-memory.dmp

Filesize
1024KB

Download
memory/2308-23-0x0000000000220000-0x0000000000247000-memory.dmp

Filesize
156KB

Download
memory/2308-88-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2308-31-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2308-99-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2308-21-0x0000000000760000-0x0000000000860000-memory.dmp

Filesize
1024KB

Download
memory/2632-49-0x0000000000240000-0x0000000000241000-memory.dmp

Filesize
4KB

Download
memory/2632-35-0x0000000000240000-0x0000000000241000-memory.dmp

Filesize
4KB

Download
memory/2632-45-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/2632-34-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads