stealc | 9e7b0a827b302d9f15eb1e1303fae16788fdd9ca72236b6d1d297dbfc14cb73d

Analysis

max time kernel
150s
max time network
125s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
15-03-2024 04:24

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General

Target

$TEMP/InstallSetup_two.exe
Size

388KB
MD5

21e039c9526d9af270a51b1145ee3c5c
SHA1

92411cfe14cf7717eae50b5420f25176ed03eb53
SHA256

5a62584d8b61c9e23281990a954f497b238dc12509e81bf8de1b1b9bf10141fc
SHA512

23b181e33c781b35bd1d2e3b0eeac844006db480f4a131fd2e2f3122542f488251e753e66e377bb6beaa3624a825c910e76c54a2337e05bb538202a5546ced02
SSDEEP

6144:Pmnh/qNdaHXG8q5sNIsIvOJ2xLV3mkcsbXZ8F/30rUogOUViu5:Kh/edaH2z5FOQtVxc4J8F/37O+5

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

Executes dropped EXE 3 IoCs

pid	Process
1196	u27s.0.exe
2644	u27s.1.exe
2056	FBFHJJJDAF.exe

Loads dropped DLL 12 IoCs

pid	Process
2872	InstallSetup_two.exe
2872	InstallSetup_two.exe
2872	InstallSetup_two.exe
2872	InstallSetup_two.exe
2872	InstallSetup_two.exe
2872	InstallSetup_two.exe
2872	InstallSetup_two.exe
2872	InstallSetup_two.exe
2872	InstallSetup_two.exe
1196	u27s.0.exe
1196	u27s.0.exe
1836	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

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral3/files/0x003700000001539f-23.dat	upx
behavioral3/memory/2644-39-0x0000000000400000-0x0000000000930000-memory.dmp	upx
behavioral3/memory/2644-101-0x0000000000400000-0x0000000000930000-memory.dmp	upx
behavioral3/memory/2644-176-0x0000000000400000-0x0000000000930000-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-1-5-21-406356229-2805545415-1236085040-1000\Software\Microsoft\Windows\CurrentVersion\Run\Ledger-Live Updater = "C:\\Users\\Admin\\AppData\\Local\\Temp\\FBFHJJJDAF.exe"	FBFHJJJDAF.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	u27s.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u27s.0.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
1964	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
696	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1196	u27s.0.exe
1196	u27s.0.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe
2056	FBFHJJJDAF.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2056	FBFHJJJDAF.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2644	u27s.1.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 2872 wrote to memory of 1196	2872	InstallSetup_two.exe	28
PID 2872 wrote to memory of 1196	2872	InstallSetup_two.exe	28
PID 2872 wrote to memory of 1196	2872	InstallSetup_two.exe	28
PID 2872 wrote to memory of 1196	2872	InstallSetup_two.exe	28
PID 2872 wrote to memory of 2644	2872	InstallSetup_two.exe	29
PID 2872 wrote to memory of 2644	2872	InstallSetup_two.exe	29
PID 2872 wrote to memory of 2644	2872	InstallSetup_two.exe	29
PID 2872 wrote to memory of 2644	2872	InstallSetup_two.exe	29
PID 2644 wrote to memory of 1948	2644	u27s.1.exe	32
PID 2644 wrote to memory of 1948	2644	u27s.1.exe	32
PID 2644 wrote to memory of 1948	2644	u27s.1.exe	32
PID 2644 wrote to memory of 1948	2644	u27s.1.exe	32
PID 1948 wrote to memory of 1940	1948	cmd.exe	34
PID 1948 wrote to memory of 1940	1948	cmd.exe	34
PID 1948 wrote to memory of 1940	1948	cmd.exe	34
PID 1948 wrote to memory of 1940	1948	cmd.exe	34
PID 1948 wrote to memory of 1964	1948	cmd.exe	35
PID 1948 wrote to memory of 1964	1948	cmd.exe	35
PID 1948 wrote to memory of 1964	1948	cmd.exe	35
PID 1948 wrote to memory of 1964	1948	cmd.exe	35
PID 1196 wrote to memory of 1836	1196	u27s.0.exe	36
PID 1196 wrote to memory of 1836	1196	u27s.0.exe	36
PID 1196 wrote to memory of 1836	1196	u27s.0.exe	36
PID 1196 wrote to memory of 1836	1196	u27s.0.exe	36
PID 1196 wrote to memory of 1100	1196	u27s.0.exe	38
PID 1196 wrote to memory of 1100	1196	u27s.0.exe	38
PID 1196 wrote to memory of 1100	1196	u27s.0.exe	38
PID 1196 wrote to memory of 1100	1196	u27s.0.exe	38
PID 1836 wrote to memory of 2056	1836	cmd.exe	40
PID 1836 wrote to memory of 2056	1836	cmd.exe	40
PID 1836 wrote to memory of 2056	1836	cmd.exe	40
PID 1836 wrote to memory of 2056	1836	cmd.exe	40
PID 2056 wrote to memory of 1060	2056	FBFHJJJDAF.exe	41
PID 2056 wrote to memory of 1060	2056	FBFHJJJDAF.exe	41
PID 2056 wrote to memory of 1060	2056	FBFHJJJDAF.exe	41
PID 2056 wrote to memory of 1060	2056	FBFHJJJDAF.exe	41
PID 1060 wrote to memory of 696	1060	cmd.exe	43
PID 1060 wrote to memory of 696	1060	cmd.exe	43
PID 1060 wrote to memory of 696	1060	cmd.exe	43
PID 1060 wrote to memory of 696	1060	cmd.exe	43

C:\Users\Admin\AppData\Local\Temp\$TEMP\InstallSetup_two.exe
"C:\Users\Admin\AppData\Local\Temp\$TEMP\InstallSetup_two.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2872
- C:\Users\Admin\AppData\Local\Temp\u27s.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u27s.0.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1196
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\FBFHJJJDAF.exe"
    3⤵
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:1836
  - - C:\Users\Admin\AppData\Local\Temp\FBFHJJJDAF.exe
      "C:\Users\Admin\AppData\Local\Temp\FBFHJJJDAF.exe"
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:2056
    - - 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\FBFHJJJDAF.exe
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:1060
      - C:\Windows\SysWOW64\PING.EXE
        
        ping 2.2.2.2 -n 1 -w 3000
        6⤵
        Runs ping.exe
        
        PID:696
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\JJKEBGHJKF.exe"
    3⤵
    PID:1100
- C:\Users\Admin\AppData\Local\Temp\u27s.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u27s.1.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2644
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Roaming\Temp\Task.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1948
  - - C:\Windows\SysWOW64\chcp.com
      chcp 1251
      4⤵
      PID:1940
  - - 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:1964

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:\Users\Admin\AppData\Local\Temp\FBFHJJJDAF.exe

Filesize
101KB

MD5
42b838cf8bdf67400525e128d917f6e0

SHA1
a578f6faec738912dba8c41e7abe1502c46d0cae

SHA256
0e4ffba62ce9a464aa1b7ff9f1e55ace8f51ff1e15102d856f801a81f8b4607d

SHA512
f64b39d885375251ab7db72c57dc5b5095f0c6412169f1035d1f6a25b8415a2a01004d06bfa0267cf683ef7dea7a9f969ad43fde5a4376f1fcb65a57403433c0

Download Submit
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\u27s.0.exe

Filesize
237KB

MD5
2dca1d0c0e9f892a717ed02f6e90211a

SHA1
5857f867c5fb4bedc25794c1f960b3c03dfabccf

SHA256
b589fe21a9c02115d64fa8adab169804c69532eb2476132135a568afd179cefb

SHA512
2f84804935e96ba3ced308deaa1c5c8b991b4ab70551b192fbedee36b629b12780d338f84e2ed95e427eb4b93c6def9aa82d15f1d97add3fa8366b620463bd5d

Download Submit
\Users\Admin\AppData\Local\Temp\u27s.1.exe

Filesize
1.7MB

MD5
eee5ddcffbed16222cac0a1b4e2e466e

SHA1
28b40c88b8ea50b0782e2bcbb4cc0f411035f3d5

SHA256
2a40e5dccc7526c4982334941c90f95374460e2a816e84e724e98c4d52ae8c54

SHA512
8f88901f3ebd425818db09f268df19ccf8a755603f04e9481bcf02b112a84393f8a900ead77f8f971bfa33fd9fa5636b7494aaee864a0fb04e3273911a4216dc

Download Submit
memory/1100-167-0x00000000022B0000-0x00000000022B1000-memory.dmp

Filesize
4KB

Download
memory/1196-123-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1196-127-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1196-131-0x0000000000230000-0x0000000000330000-memory.dmp

Filesize
1024KB

Download
memory/1196-42-0x0000000000230000-0x0000000000330000-memory.dmp

Filesize
1024KB

Download
memory/1196-43-0x00000000003A0000-0x00000000003C7000-memory.dmp

Filesize
156KB

Download
memory/1196-44-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1196-45-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/1196-100-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2056-143-0x0000000000E40000-0x0000000000E5E000-memory.dmp

Filesize
120KB

Download
memory/2056-154-0x00000000719C0000-0x00000000720AE000-memory.dmp

Filesize
6.9MB

Download
memory/2056-178-0x00000000719C0000-0x00000000720AE000-memory.dmp

Filesize
6.9MB

Download
memory/2056-171-0x0000000004D20000-0x0000000004D60000-memory.dmp

Filesize
256KB

Download
memory/2056-179-0x0000000004D20000-0x0000000004D60000-memory.dmp

Filesize
256KB

Download
memory/2644-165-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

Download
memory/2644-39-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/2644-40-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

Download
memory/2644-176-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/2644-101-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/2872-2-0x0000000000330000-0x0000000000397000-memory.dmp

Filesize
412KB

Download
memory/2872-35-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2872-3-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2872-36-0x0000000003110000-0x0000000003640000-memory.dmp

Filesize
5.2MB

Download
memory/2872-34-0x0000000003110000-0x0000000003640000-memory.dmp

Filesize
5.2MB

Download
memory/2872-1-0x0000000000550000-0x0000000000650000-memory.dmp

Filesize
1024KB

Download