stealc | 7373e0bd6ebe13f63c61ddbe376372d161b95cc0f410cc7766b0786e4642bebc

Analysis

max time kernel
150s
max time network
120s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
13-03-2024 20:32

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General

Target

$TEMP/syncUpd.exe
Size

200KB
MD5

c722591f624fb69970f246b8c81d830f
SHA1

85516decea5d6987bebe39cbadf36053beaf4bb0
SHA256

13cd1152a19fdac6581cac2bd822f34bd3026ea1783ff231e299b6d28c046a6a
SHA512

822584c5c8a0813af4d845e80919776c71a43464ab719d1c303ebaae6a8ed47763183566bedc9be2e8c44de8ee6fd62d1e12be471e5d5c73ae4b1dcdaa34a908
SSDEEP

3072:8PDOu5suCmavnBRsuP6GTdbB27zP6FtHPUxX1GOL3+:455zaPBRPPj27uPH8jzu

Score

10^/10

stealc discovery persistence spyware stealer

Malware Config

Extracted

Family

stealc

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

Processes:

resource	yara_rule
behavioral7/memory/2320-4-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral7/memory/2320-40-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral7/memory/2320-44-0x0000000000250000-0x0000000000350000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral7/memory/2320-45-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral7/memory/2320-70-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral7/memory/2320-74-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral7/memory/2320-81-0x0000000000250000-0x0000000000350000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral7/memory/2320-77-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs

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

Processes:

resource	yara_rule
behavioral7/memory/2320-4-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral7/memory/2320-40-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral7/memory/2320-44-0x0000000000250000-0x0000000000350000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral7/memory/2320-45-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral7/memory/2320-70-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral7/memory/2320-74-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral7/memory/2320-81-0x0000000000250000-0x0000000000350000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral7/memory/2320-77-0x0000000000400000-0x000000000063B000-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

Processes:

resource	yara_rule
behavioral7/memory/2320-4-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral7/memory/2320-40-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral7/memory/2320-45-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral7/memory/2320-70-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral7/memory/2320-74-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral7/memory/2320-77-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers

Downloads MZ/PE file

Executes dropped EXE 1 IoCs

Processes:

AFBKKFBAEG.exe

pid	Process
2832	AFBKKFBAEG.exe

Loads dropped DLL 3 IoCs

Processes:

syncUpd.execmd.exe

pid	Process
2320	syncUpd.exe
2320	syncUpd.exe
1196	cmd.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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

AFBKKFBAEG.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Windows\CurrentVersion\Run\Ledger-Live Updater = "C:\\Users\\Admin\\AppData\\Local\\Temp\\AFBKKFBAEG.exe"	AFBKKFBAEG.exe

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

Processes:

syncUpd.exe

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

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

Processes:

PING.EXE

pid	Process
452	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

syncUpd.exeAFBKKFBAEG.exe

pid	Process
2320	syncUpd.exe
2320	syncUpd.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe
2832	AFBKKFBAEG.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

AFBKKFBAEG.exe

description	pid	Process
Token: SeDebugPrivilege	2832	AFBKKFBAEG.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

syncUpd.execmd.exeAFBKKFBAEG.execmd.exe

description	pid	Process	procid_target
PID 2320 wrote to memory of 1196	2320	syncUpd.exe	31
PID 2320 wrote to memory of 1196	2320	syncUpd.exe	31
PID 2320 wrote to memory of 1196	2320	syncUpd.exe	31
PID 2320 wrote to memory of 1196	2320	syncUpd.exe	31
PID 2320 wrote to memory of 1856	2320	syncUpd.exe	33
PID 2320 wrote to memory of 1856	2320	syncUpd.exe	33
PID 2320 wrote to memory of 1856	2320	syncUpd.exe	33
PID 2320 wrote to memory of 1856	2320	syncUpd.exe	33
PID 1196 wrote to memory of 2832	1196	cmd.exe	35
PID 1196 wrote to memory of 2832	1196	cmd.exe	35
PID 1196 wrote to memory of 2832	1196	cmd.exe	35
PID 1196 wrote to memory of 2832	1196	cmd.exe	35
PID 2832 wrote to memory of 1996	2832	AFBKKFBAEG.exe	36
PID 2832 wrote to memory of 1996	2832	AFBKKFBAEG.exe	36
PID 2832 wrote to memory of 1996	2832	AFBKKFBAEG.exe	36
PID 2832 wrote to memory of 1996	2832	AFBKKFBAEG.exe	36
PID 1996 wrote to memory of 452	1996	cmd.exe	38
PID 1996 wrote to memory of 452	1996	cmd.exe	38
PID 1996 wrote to memory of 452	1996	cmd.exe	38
PID 1996 wrote to memory of 452	1996	cmd.exe	38

C:\Users\Admin\AppData\Local\Temp\$TEMP\syncUpd.exe
"C:\Users\Admin\AppData\Local\Temp\$TEMP\syncUpd.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2320
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\AFBKKFBAEG.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1196
- - C:\Users\Admin\AppData\Local\Temp\AFBKKFBAEG.exe
    "C:\Users\Admin\AppData\Local\Temp\AFBKKFBAEG.exe"
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2832
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C ping 2.2.2.2 -n 1 -w 3000 > Nul & Del C:\Users\Admin\AppData\Local\Temp\AFBKKFBAEG.exe
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1996
    - - C:\Windows\SysWOW64\PING.EXE
        
        ping 2.2.2.2 -n 1 -w 3000
        5⤵
        Runs ping.exe
        
        PID:452
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\FBKJKEHIJE.exe"
  2⤵
  PID:1856

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\AFBKKFBAEG.exe

Filesize
101KB

MD5
42b838cf8bdf67400525e128d917f6e0

SHA1
a578f6faec738912dba8c41e7abe1502c46d0cae

SHA256
0e4ffba62ce9a464aa1b7ff9f1e55ace8f51ff1e15102d856f801a81f8b4607d

SHA512
f64b39d885375251ab7db72c57dc5b5095f0c6412169f1035d1f6a25b8415a2a01004d06bfa0267cf683ef7dea7a9f969ad43fde5a4376f1fcb65a57403433c0

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
memory/1856-115-0x0000000000670000-0x0000000000671000-memory.dmp

Filesize
4KB

Download
memory/2320-70-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2320-2-0x00000000003C0000-0x00000000003E7000-memory.dmp

Filesize
156KB

Download
memory/2320-44-0x0000000000250000-0x0000000000350000-memory.dmp

Filesize
1024KB

Download
memory/2320-45-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2320-5-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/2320-4-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2320-1-0x0000000000250000-0x0000000000350000-memory.dmp

Filesize
1024KB

Download
memory/2320-74-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2320-81-0x0000000000250000-0x0000000000350000-memory.dmp

Filesize
1024KB

Download
memory/2320-40-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2320-77-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2320-3-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2832-113-0x00000000736F0000-0x0000000073DDE000-memory.dmp

Filesize
6.9MB

Download
memory/2832-108-0x00000000000A0000-0x00000000000BE000-memory.dmp

Filesize
120KB

Download
memory/2832-120-0x0000000004B90000-0x0000000004BD0000-memory.dmp

Filesize
256KB

Download
memory/2832-125-0x00000000736F0000-0x0000000073DDE000-memory.dmp

Filesize
6.9MB

Download
memory/2832-126-0x0000000004B90000-0x0000000004BD0000-memory.dmp

Filesize
256KB

Download