stealc | 88f63ac3dab441b1700f400b9e76a8058adf9fa0d5d6249188db8b8aba6d1639

Analysis

max time kernel
300s
max time network
271s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
15/03/2024, 03:10

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General

Target

InstallSetup3.exe
Size

2.1MB
MD5

c7ee61ad8411b416c6ed57b35ea93633
SHA1

e1338440a0b8bb218bdb6b145c6bcad4f4b7e43e
SHA256

88f63ac3dab441b1700f400b9e76a8058adf9fa0d5d6249188db8b8aba6d1639
SHA512

e59bac4d6b666baa7a9dfbaf20d57f451b97c31d719e0c4b7326aeb74be1abf9e81bc431031b0bd47ba622957149a9f5b44147a872ee5148176d3be8ac22ab44
SSDEEP

49152:LcrnT6iJbA2f7ETdF0UTGMT5GwLjOZ6UKo0yS+mEd54+KCAuTC:SnTtEkwTv0UTGMTzHOnkb+xda+2uTC

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation	syncUpd.exe
Key value queried	\REGISTRY\USER\S-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation	DGDBFBFCBF.exe

Executes dropped EXE 3 IoCs

pid	Process
4680	syncUpd.exe
4044	BroomSetup.exe
2468	DGDBFBFCBF.exe

Loads dropped DLL 4 IoCs

pid	Process
4724	InstallSetup3.exe
4724	InstallSetup3.exe
4680	syncUpd.exe
4680	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/0x000300000002276e-21.dat	upx
behavioral2/memory/4044-23-0x0000000000400000-0x0000000000930000-memory.dmp	upx
behavioral2/memory/4044-33-0x0000000000400000-0x0000000000930000-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

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-983155329-280873152-1838004294-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Ledger-Live Updater = "C:\\Users\\Admin\\AppData\\Local\\Temp\\DGDBFBFCBF.exe"	DGDBFBFCBF.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

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
2512	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2652	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4680	syncUpd.exe
4680	syncUpd.exe
4680	syncUpd.exe
4680	syncUpd.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe
2468	DGDBFBFCBF.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2468	DGDBFBFCBF.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4044	BroomSetup.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 4724 wrote to memory of 4680	4724	InstallSetup3.exe	88
PID 4724 wrote to memory of 4680	4724	InstallSetup3.exe	88
PID 4724 wrote to memory of 4680	4724	InstallSetup3.exe	88
PID 4724 wrote to memory of 4044	4724	InstallSetup3.exe	92
PID 4724 wrote to memory of 4044	4724	InstallSetup3.exe	92
PID 4724 wrote to memory of 4044	4724	InstallSetup3.exe	92
PID 4044 wrote to memory of 1504	4044	BroomSetup.exe	93
PID 4044 wrote to memory of 1504	4044	BroomSetup.exe	93
PID 4044 wrote to memory of 1504	4044	BroomSetup.exe	93
PID 1504 wrote to memory of 2068	1504	cmd.exe	95
PID 1504 wrote to memory of 2068	1504	cmd.exe	95
PID 1504 wrote to memory of 2068	1504	cmd.exe	95
PID 1504 wrote to memory of 2512	1504	cmd.exe	96
PID 1504 wrote to memory of 2512	1504	cmd.exe	96
PID 1504 wrote to memory of 2512	1504	cmd.exe	96
PID 4680 wrote to memory of 836	4680	syncUpd.exe	113
PID 4680 wrote to memory of 836	4680	syncUpd.exe	113
PID 4680 wrote to memory of 836	4680	syncUpd.exe	113
PID 836 wrote to memory of 2468	836	cmd.exe	116
PID 836 wrote to memory of 2468	836	cmd.exe	116
PID 836 wrote to memory of 2468	836	cmd.exe	116
PID 2468 wrote to memory of 808	2468	DGDBFBFCBF.exe	119
PID 2468 wrote to memory of 808	2468	DGDBFBFCBF.exe	119
PID 2468 wrote to memory of 808	2468	DGDBFBFCBF.exe	119
PID 808 wrote to memory of 2652	808	cmd.exe	121
PID 808 wrote to memory of 2652	808	cmd.exe	121
PID 808 wrote to memory of 2652	808	cmd.exe	121

C:\Users\Admin\AppData\Local\Temp\InstallSetup3.exe
"C:\Users\Admin\AppData\Local\Temp\InstallSetup3.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:4724
- 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:4680
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\DGDBFBFCBF.exe"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:836
  - - C:\Users\Admin\AppData\Local\Temp\DGDBFBFCBF.exe
      "C:\Users\Admin\AppData\Local\Temp\DGDBFBFCBF.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:2468
    - - 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\DGDBFBFCBF.exe
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:808
      - C:\Windows\SysWOW64\PING.EXE
        
        ping 2.2.2.2 -n 1 -w 3000
        6⤵
        Runs ping.exe
        
        PID:2652
- 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:4044
- - 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:1504
  - - C:\Windows\SysWOW64\chcp.com
      chcp 1251
      4⤵
      PID:2068
  - - 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:2512

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
165KB

MD5
8bd60b0d9622ae0d09f46c29e87f8893

SHA1
e8cfa64625ec9121bb33cda089033d761af26ac0

SHA256
68d5d93158168d858d38eedbda3d2eaa751ef5bf1683e822e4d607c1a63c7171

SHA512
2fa8a0302b7ac115e240389ccdb4c789c9616f0c55f6d1e90720dbecd3f76868013069409cabddce9f3bf436e4c4f31693deabe32626428b5075eba1019de9b1

Download Submit
C:\ProgramData\mozglue.dll

Filesize
213KB

MD5
d18952ddf09d5f844b92101bf903c747

SHA1
32094b936799be4cc3b288aadce8150d22c35b41

SHA256
3a2bac1e2b22d3357af152da3efc8d2287252a4e45a4ddb7b1e689a002373e2e

SHA512
dffe88a0bda5ca6c35a46f9031c98424ee249181a480f6bccaba6b8a34e5b6e906fc3246b3db1b8222ed910be791dfaef9c6b51ccdeca12808ba12f8f6c6598f

Download Submit
C:\ProgramData\nss3.dll

Filesize
392KB

MD5
97b3aefea81b5d9d0502071a3095e193

SHA1
2b2e1e62c254a8927c60bda8040f44e1ea091245

SHA256
e2e9632fc21a9992c503bcedc2b073d2ff1e8cffa40fd39a3b0be4feaf7c2600

SHA512
0157227a5866ac0e30604b5965f13747c33757ec31e0e7912ddad1d094ae3c8c6259a9243df062ca866a1caa69ed6ca3c2bff90e6bf7b0d70c735b284c34dd31

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

Filesize
960KB

MD5
c495f139012768d0d7b14b6ca61259a8

SHA1
a04fea76933a68ec5ec892f7949f592312749285

SHA256
6d92eb626f507069a8011410f0b0d19a9d76ae86b868ffd877329e1eb0e3fab5

SHA512
9b8614624cac5dcbc1b6a8f429125ce7f3b1b926200382b0b854e126d4431bfe179749b8a15e9264afe702ff190f646d9fcf6842eed39454cf2015851e7d8e42

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

Filesize
101KB

MD5
42b838cf8bdf67400525e128d917f6e0

SHA1
a578f6faec738912dba8c41e7abe1502c46d0cae

SHA256
0e4ffba62ce9a464aa1b7ff9f1e55ace8f51ff1e15102d856f801a81f8b4607d

SHA512
f64b39d885375251ab7db72c57dc5b5095f0c6412169f1035d1f6a25b8415a2a01004d06bfa0267cf683ef7dea7a9f969ad43fde5a4376f1fcb65a57403433c0

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsu4690.tmp\INetC.dll

Filesize
21KB

MD5
2b342079303895c50af8040a91f30f71

SHA1
b11335e1cb8356d9c337cb89fe81d669a69de17e

SHA256
2d5d89025911e2e273f90f393624be4819641dbee1606de792362e442e54612f

SHA512
550452dadc86ecd205f40668894116790a456fe46e9985d68093d36cf32abf00edecb5c56ff0287464a0e819db7b3cc53926037a116de6c651332a7cc8035d47

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

Filesize
237KB

MD5
2dca1d0c0e9f892a717ed02f6e90211a

SHA1
5857f867c5fb4bedc25794c1f960b3c03dfabccf

SHA256
b589fe21a9c02115d64fa8adab169804c69532eb2476132135a568afd179cefb

SHA512
2f84804935e96ba3ced308deaa1c5c8b991b4ab70551b192fbedee36b629b12780d338f84e2ed95e427eb4b93c6def9aa82d15f1d97add3fa8366b620463bd5d

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

Filesize
128B

MD5
11bb3db51f701d4e42d3287f71a6a43e

SHA1
63a4ee82223be6a62d04bdfe40ef8ba91ae49a86

SHA256
6be22058abfb22b40a42fb003f86b89e204a83024c03eb82cd53e2a0a047c331

SHA512
907ad2c070cc1db89f43459a94d7f48985d939d749c9648b78572a266f0d3fde47813a129e9151dbf4a7d96d36f588172f57c88b8b947b56ed818d7d068abab2

Download Submit
memory/2468-143-0x0000000000900000-0x000000000091E000-memory.dmp

Filesize
120KB

Download
memory/2468-144-0x0000000072C70000-0x0000000073420000-memory.dmp

Filesize
7.7MB

Download
memory/2468-145-0x0000000005260000-0x0000000005270000-memory.dmp

Filesize
64KB

Download
memory/2468-149-0x0000000072C70000-0x0000000073420000-memory.dmp

Filesize
7.7MB

Download
memory/2468-151-0x0000000005260000-0x0000000005270000-memory.dmp

Filesize
64KB

Download
memory/4044-74-0x0000000000AA0000-0x0000000000AA1000-memory.dmp

Filesize
4KB

Download
memory/4044-33-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/4044-23-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/4044-24-0x0000000000AA0000-0x0000000000AA1000-memory.dmp

Filesize
4KB

Download
memory/4680-32-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/4680-73-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/4680-34-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/4680-100-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/4680-126-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/4680-76-0x0000000000830000-0x0000000000930000-memory.dmp

Filesize
1024KB

Download
memory/4680-139-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/4680-28-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/4680-27-0x00000000007D0000-0x00000000007F7000-memory.dmp

Filesize
156KB

Download
memory/4680-26-0x0000000000830000-0x0000000000930000-memory.dmp

Filesize
1024KB

Download
memory/4680-90-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/4680-82-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/4724-22-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download