stealc | b9f0d560b1dbc7c3b7066bb398c4e280878c07c41523f75385cf841d90c6b36a

General

Target

b9f0d560b1dbc7c3b7066bb398c4e280878c07c41523f75385cf841d90c6b36a.exe
Size

1.8MB
MD5

2c49e84b995fae079eebf654b00723e7
SHA1

f996ae30e005f7c23560eb5e2650d621653ebbd8
SHA256

b9f0d560b1dbc7c3b7066bb398c4e280878c07c41523f75385cf841d90c6b36a
SHA512

3c192a9cc1ea4f515166fe00d5be2c472a69d6238f4ee56d5395b707f2e4a2dd71807d9dd778298b36bc9f696c772c8275b77bcc052a3f5e8903e70a888af9e2
SSDEEP

49152:tIiiK2S2HDNbyTA1hClcC6O+84qYtrSVq2jMkAfG4bley:qiiK2BDN2TASGlgYMV/fAO+D

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/1076-30-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/1076-71-0x0000000000820000-0x0000000000920000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/1076-75-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/1076-84-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/1076-109-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/1076-124-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/1076-136-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/1076-139-0x0000000000400000-0x000000000063B000-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/1076-30-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/1076-71-0x0000000000820000-0x0000000000920000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/1076-75-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/1076-84-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/1076-109-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/1076-124-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/1076-136-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/1076-139-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs

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

resource	yara_rule
behavioral2/memory/1076-30-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/1076-75-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/1076-84-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/1076-109-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/1076-124-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/1076-136-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/1076-139-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral2/files/0x0007000000023216-23.dat	UPX
behavioral2/memory/1632-24-0x0000000000400000-0x0000000000930000-memory.dmp	UPX
behavioral2/memory/1632-70-0x0000000000400000-0x0000000000930000-memory.dmp	UPX

Downloads MZ/PE file

Executes dropped EXE 2 IoCs

pid	Process
1076	syncUpd.exe
1632	BroomSetup.exe

Loads dropped DLL 4 IoCs

pid	Process
1216	b9f0d560b1dbc7c3b7066bb398c4e280878c07c41523f75385cf841d90c6b36a.exe
1216	b9f0d560b1dbc7c3b7066bb398c4e280878c07c41523f75385cf841d90c6b36a.exe
1076	syncUpd.exe
1076	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/0x0007000000023216-23.dat	upx
behavioral2/memory/1632-24-0x0000000000400000-0x0000000000930000-memory.dmp	upx
behavioral2/memory/1632-70-0x0000000000400000-0x0000000000930000-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
1848	1076	WerFault.exe	89

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
2912	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1076	syncUpd.exe
1076	syncUpd.exe
1076	syncUpd.exe
1076	syncUpd.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1632	BroomSetup.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1216 wrote to memory of 1076	1216	b9f0d560b1dbc7c3b7066bb398c4e280878c07c41523f75385cf841d90c6b36a.exe	89
PID 1216 wrote to memory of 1076	1216	b9f0d560b1dbc7c3b7066bb398c4e280878c07c41523f75385cf841d90c6b36a.exe	89
PID 1216 wrote to memory of 1076	1216	b9f0d560b1dbc7c3b7066bb398c4e280878c07c41523f75385cf841d90c6b36a.exe	89
PID 1216 wrote to memory of 1632	1216	b9f0d560b1dbc7c3b7066bb398c4e280878c07c41523f75385cf841d90c6b36a.exe	91
PID 1216 wrote to memory of 1632	1216	b9f0d560b1dbc7c3b7066bb398c4e280878c07c41523f75385cf841d90c6b36a.exe	91
PID 1216 wrote to memory of 1632	1216	b9f0d560b1dbc7c3b7066bb398c4e280878c07c41523f75385cf841d90c6b36a.exe	91
PID 1632 wrote to memory of 3660	1632	BroomSetup.exe	92
PID 1632 wrote to memory of 3660	1632	BroomSetup.exe	92
PID 1632 wrote to memory of 3660	1632	BroomSetup.exe	92
PID 3660 wrote to memory of 5052	3660	cmd.exe	94
PID 3660 wrote to memory of 5052	3660	cmd.exe	94
PID 3660 wrote to memory of 5052	3660	cmd.exe	94
PID 3660 wrote to memory of 2912	3660	cmd.exe	95
PID 3660 wrote to memory of 2912	3660	cmd.exe	95
PID 3660 wrote to memory of 2912	3660	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\b9f0d560b1dbc7c3b7066bb398c4e280878c07c41523f75385cf841d90c6b36a.exe
"C:\Users\Admin\AppData\Local\Temp\b9f0d560b1dbc7c3b7066bb398c4e280878c07c41523f75385cf841d90c6b36a.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1216
- 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:1076
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1076 -s 2368
    3⤵
    - Program crash
    PID:1848
- 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:1632
- - 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:3660
  - - C:\Windows\SysWOW64\chcp.com
      chcp 1251
      4⤵
      PID:5052
  - - 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:2912

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 476 -p 1076 -ip 1076
1⤵
PID:648

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
1.5MB

MD5
a6d7825ac00be559f95013bd71f0ba4d

SHA1
ea5500d84fbadc2206f783bb3f06f09ed4249bf8

SHA256
a974af31ae5b7b6a97ffe487c33f86517d31c093f0b268566caf483a061a0112

SHA512
a976d5959c1d77a228123aec083e9f8bf3df27e59a50aca16b60ba7960942fc1e92d34994a7429e6f23bec4f268984ded216607376e0307ac35b09585d76321e

Download Submit
C:\Users\Admin\AppData\Local\Temp\nss668C.tmp\INetC.dll

Filesize
21KB

MD5
2b342079303895c50af8040a91f30f71

SHA1
b11335e1cb8356d9c337cb89fe81d669a69de17e

SHA256
2d5d89025911e2e273f90f393624be4819641dbee1606de792362e442e54612f

SHA512
550452dadc86ecd205f40668894116790a456fe46e9985d68093d36cf32abf00edecb5c56ff0287464a0e819db7b3cc53926037a116de6c651332a7cc8035d47

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

Filesize
200KB

MD5
94bbc397cb882051d1e8b213a06c8200

SHA1
05e330dd31360ef34a90f96d385a28c0ae246faf

SHA256
6d2fedb6293fe0035eb0ce4380cbf993865d3fff561add74861516ae977519c5

SHA512
8151836eb9f3605af9e3569ffaa13b749d8d2522181e1864b072e59196ba95f3aaa79bc6aba75eb080ebd9c587aac5f2d9057825b29ff96ab052a1164cab6f45

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

Filesize
128B

MD5
11bb3db51f701d4e42d3287f71a6a43e

SHA1
63a4ee82223be6a62d04bdfe40ef8ba91ae49a86

SHA256
6be22058abfb22b40a42fb003f86b89e204a83024c03eb82cd53e2a0a047c331

SHA512
907ad2c070cc1db89f43459a94d7f48985d939d749c9648b78572a266f0d3fde47813a129e9151dbf4a7d96d36f588172f57c88b8b947b56ed818d7d068abab2

Download Submit
memory/1076-136-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1076-139-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1076-30-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1076-31-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/1076-18-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1076-71-0x0000000000820000-0x0000000000920000-memory.dmp

Filesize
1024KB

Download
memory/1076-75-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1076-16-0x00000000007B0000-0x00000000007D7000-memory.dmp

Filesize
156KB

Download
memory/1076-84-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1076-15-0x0000000000820000-0x0000000000920000-memory.dmp

Filesize
1024KB

Download
memory/1076-124-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1076-109-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1216-25-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/1632-24-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/1632-83-0x00000000010B0000-0x00000000010B1000-memory.dmp

Filesize
4KB

Download
memory/1632-70-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/1632-26-0x00000000010B0000-0x00000000010B1000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads