stealc | f131584c3dd59f8b331ef31de998c7a20a97fb0e69192d0d3cf508f9ac0052a6

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
12-03-2024 21:46

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General

Target

f131584c3dd59f8b331ef31de998c7a20a97fb0e69192d0d3cf508f9ac0052a6.exe
Size

2.0MB
MD5

a7532e38ae9b3f83af605c4555360b82
SHA1

4a194a99ccaa5eed30679c456a193fd9366cd4ed
SHA256

f131584c3dd59f8b331ef31de998c7a20a97fb0e69192d0d3cf508f9ac0052a6
SHA512

d22aa9058838fa665de535155ac745afa1b061861b62fdf24c4ea167c82c187c126bad5baa34994ac0f553a38dfc91992b20d4d8c4c71ba60734230bc5060ff2
SSDEEP

49152:LcvQtGW80/TtxeuPie5JqmdglAPHzWwu8HHxFNWyf0h8I7:iiGW80/TDzjqmdBHqqZpY7

Score

10^/10

stealc discovery persistence spyware stealer upx

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
Downloads MZ/PE file

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

syncUpd.exeFBKFCFBFID.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2727153400-192325109-1870347593-1000\Control Panel\International\Geo\Nation	syncUpd.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2727153400-192325109-1870347593-1000\Control Panel\International\Geo\Nation	FBKFCFBFID.exe

Executes dropped EXE 3 IoCs

Processes:

syncUpd.exeBroomSetup.exeFBKFCFBFID.exe

pid	Process
1620	syncUpd.exe
3976	BroomSetup.exe
4608	FBKFCFBFID.exe

Loads dropped DLL 4 IoCs

Processes:

f131584c3dd59f8b331ef31de998c7a20a97fb0e69192d0d3cf508f9ac0052a6.exesyncUpd.exe

pid	Process
3964	f131584c3dd59f8b331ef31de998c7a20a97fb0e69192d0d3cf508f9ac0052a6.exe
3964	f131584c3dd59f8b331ef31de998c7a20a97fb0e69192d0d3cf508f9ac0052a6.exe
1620	syncUpd.exe
1620	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

Processes:

resource	yara_rule
behavioral2/files/0x0007000000023207-21.dat	upx
behavioral2/memory/3976-23-0x0000000000400000-0x0000000000930000-memory.dmp	upx
behavioral2/memory/3976-72-0x0000000000400000-0x0000000000930000-memory.dmp	upx

Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials In Files
T1552.001

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

FBKFCFBFID.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2727153400-192325109-1870347593-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Ledger-Live Updater = "C:\\Users\\Admin\\AppData\\Local\\Temp\\FBKFCFBFID.exe"	FBKFCFBFID.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

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

Processes:

schtasks.exe

pid	Process
3984	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

Processes:

PING.EXE

pid	Process
3140	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

syncUpd.exeFBKFCFBFID.exe

pid	Process
1620	syncUpd.exe
1620	syncUpd.exe
1620	syncUpd.exe
1620	syncUpd.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe
4608	FBKFCFBFID.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

FBKFCFBFID.exe

description	pid	Process
Token: SeDebugPrivilege	4608	FBKFCFBFID.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

BroomSetup.exe

pid	Process
3976	BroomSetup.exe

Suspicious use of WriteProcessMemory 27 IoCs

Processes:

f131584c3dd59f8b331ef31de998c7a20a97fb0e69192d0d3cf508f9ac0052a6.exeBroomSetup.execmd.exesyncUpd.execmd.exeFBKFCFBFID.execmd.exe

description	pid	Process	procid_target
PID 3964 wrote to memory of 1620	3964	f131584c3dd59f8b331ef31de998c7a20a97fb0e69192d0d3cf508f9ac0052a6.exe	87
PID 3964 wrote to memory of 1620	3964	f131584c3dd59f8b331ef31de998c7a20a97fb0e69192d0d3cf508f9ac0052a6.exe	87
PID 3964 wrote to memory of 1620	3964	f131584c3dd59f8b331ef31de998c7a20a97fb0e69192d0d3cf508f9ac0052a6.exe	87
PID 3964 wrote to memory of 3976	3964	f131584c3dd59f8b331ef31de998c7a20a97fb0e69192d0d3cf508f9ac0052a6.exe	91
PID 3964 wrote to memory of 3976	3964	f131584c3dd59f8b331ef31de998c7a20a97fb0e69192d0d3cf508f9ac0052a6.exe	91
PID 3964 wrote to memory of 3976	3964	f131584c3dd59f8b331ef31de998c7a20a97fb0e69192d0d3cf508f9ac0052a6.exe	91
PID 3976 wrote to memory of 3952	3976	BroomSetup.exe	92
PID 3976 wrote to memory of 3952	3976	BroomSetup.exe	92
PID 3976 wrote to memory of 3952	3976	BroomSetup.exe	92
PID 3952 wrote to memory of 3788	3952	cmd.exe	94
PID 3952 wrote to memory of 3788	3952	cmd.exe	94
PID 3952 wrote to memory of 3788	3952	cmd.exe	94
PID 3952 wrote to memory of 3984	3952	cmd.exe	95
PID 3952 wrote to memory of 3984	3952	cmd.exe	95
PID 3952 wrote to memory of 3984	3952	cmd.exe	95
PID 1620 wrote to memory of 652	1620	syncUpd.exe	111
PID 1620 wrote to memory of 652	1620	syncUpd.exe	111
PID 1620 wrote to memory of 652	1620	syncUpd.exe	111
PID 652 wrote to memory of 4608	652	cmd.exe	113
PID 652 wrote to memory of 4608	652	cmd.exe	113
PID 652 wrote to memory of 4608	652	cmd.exe	113
PID 4608 wrote to memory of 1692	4608	FBKFCFBFID.exe	114
PID 4608 wrote to memory of 1692	4608	FBKFCFBFID.exe	114
PID 4608 wrote to memory of 1692	4608	FBKFCFBFID.exe	114
PID 1692 wrote to memory of 3140	1692	cmd.exe	116
PID 1692 wrote to memory of 3140	1692	cmd.exe	116
PID 1692 wrote to memory of 3140	1692	cmd.exe	116

C:\Users\Admin\AppData\Local\Temp\f131584c3dd59f8b331ef31de998c7a20a97fb0e69192d0d3cf508f9ac0052a6.exe
"C:\Users\Admin\AppData\Local\Temp\f131584c3dd59f8b331ef31de998c7a20a97fb0e69192d0d3cf508f9ac0052a6.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:3964
- C:\Users\Admin\AppData\Local\Temp\syncUpd.exe
  C:\Users\Admin\AppData\Local\Temp\syncUpd.exe
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Loads dropped DLL
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1620
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\FBKFCFBFID.exe"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:652
  - - C:\Users\Admin\AppData\Local\Temp\FBKFCFBFID.exe
      "C:\Users\Admin\AppData\Local\Temp\FBKFCFBFID.exe"
      4⤵
      Checks computer location settings
      Executes dropped EXE
      Adds Run key to start application
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:4608
    - - 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\FBKFCFBFID.exe
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:1692
      - C:\Windows\SysWOW64\PING.EXE
        
        ping 2.2.2.2 -n 1 -w 3000
        6⤵
        Runs ping.exe
        
        PID:3140
- 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:3976
- - 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:3952
  - - C:\Windows\SysWOW64\chcp.com
      chcp 1251
      4⤵
      PID:3788
  - - 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:3984

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

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

Replay Monitor

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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
1.7MB

MD5
eee5ddcffbed16222cac0a1b4e2e466e

SHA1
28b40c88b8ea50b0782e2bcbb4cc0f411035f3d5

SHA256
2a40e5dccc7526c4982334941c90f95374460e2a816e84e724e98c4d52ae8c54

SHA512
8f88901f3ebd425818db09f268df19ccf8a755603f04e9481bcf02b112a84393f8a900ead77f8f971bfa33fd9fa5636b7494aaee864a0fb04e3273911a4216dc

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

Filesize
101KB

MD5
42b838cf8bdf67400525e128d917f6e0

SHA1
a578f6faec738912dba8c41e7abe1502c46d0cae

SHA256
0e4ffba62ce9a464aa1b7ff9f1e55ace8f51ff1e15102d856f801a81f8b4607d

SHA512
f64b39d885375251ab7db72c57dc5b5095f0c6412169f1035d1f6a25b8415a2a01004d06bfa0267cf683ef7dea7a9f969ad43fde5a4376f1fcb65a57403433c0

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsk6004.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
c722591f624fb69970f246b8c81d830f

SHA1
85516decea5d6987bebe39cbadf36053beaf4bb0

SHA256
13cd1152a19fdac6581cac2bd822f34bd3026ea1783ff231e299b6d28c046a6a

SHA512
822584c5c8a0813af4d845e80919776c71a43464ab719d1c303ebaae6a8ed47763183566bedc9be2e8c44de8ee6fd62d1e12be471e5d5c73ae4b1dcdaa34a908

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

Filesize
128B

MD5
11bb3db51f701d4e42d3287f71a6a43e

SHA1
63a4ee82223be6a62d04bdfe40ef8ba91ae49a86

SHA256
6be22058abfb22b40a42fb003f86b89e204a83024c03eb82cd53e2a0a047c331

SHA512
907ad2c070cc1db89f43459a94d7f48985d939d749c9648b78572a266f0d3fde47813a129e9151dbf4a7d96d36f588172f57c88b8b947b56ed818d7d068abab2

Download Submit
memory/1620-120-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1620-139-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1620-32-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/1620-71-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1620-28-0x0000000002250000-0x0000000002277000-memory.dmp

Filesize
156KB

Download
memory/1620-79-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1620-135-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1620-82-0x0000000000870000-0x0000000000970000-memory.dmp

Filesize
1024KB

Download
memory/1620-86-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1620-95-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1620-101-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1620-27-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1620-26-0x0000000000870000-0x0000000000970000-memory.dmp

Filesize
1024KB

Download
memory/3964-22-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/3976-24-0x0000000000E90000-0x0000000000E91000-memory.dmp

Filesize
4KB

Download
memory/3976-81-0x0000000000E90000-0x0000000000E91000-memory.dmp

Filesize
4KB

Download
memory/3976-72-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/3976-23-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/4608-143-0x0000000072DD0000-0x0000000073580000-memory.dmp

Filesize
7.7MB

Download
memory/4608-144-0x0000000000C80000-0x0000000000C9E000-memory.dmp

Filesize
120KB

Download
memory/4608-145-0x0000000005750000-0x0000000005760000-memory.dmp

Filesize
64KB

Download
memory/4608-149-0x0000000072DD0000-0x0000000073580000-memory.dmp

Filesize
7.7MB

Download
memory/4608-151-0x0000000005750000-0x0000000005760000-memory.dmp

Filesize
64KB

Download