stealc | e4c88ef88cd0bae896c2e49f692d29e992f6fd261c8f7aaf96fadde55de6cdaa

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
12-03-2024 22:42

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General

Target

e4c88ef88cd0bae896c2e49f692d29e992f6fd261c8f7aaf96fadde55de6cdaa.exe
Size

2.0MB
MD5

82d5fd8413dea6b318ac98e597b2f9f6
SHA1

de8a5b67bba558d434e7edb463f9b6ee42e56394
SHA256

e4c88ef88cd0bae896c2e49f692d29e992f6fd261c8f7aaf96fadde55de6cdaa
SHA512

ca852b01bc26dffaf94b7ee3532784dc33cb29ef67affdb4cb58b3b6b64c36dacfd8e1f046fe1430386e5b7046310102826033b78c1a20f736b0787091866b0d
SSDEEP

49152:LCZ9FbqoVBbFeSNU1ux1XRJcuO+U9QGu5E4M90eSZqBraOZkS:2Z9AoVLm3paGhd9uWraOZz

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
2152	syncUpd.exe
2492	BroomSetup.exe
548	EGCFIDAFBF.exe

Loads dropped DLL 8 IoCs

pid	Process
1556	e4c88ef88cd0bae896c2e49f692d29e992f6fd261c8f7aaf96fadde55de6cdaa.exe
1556	e4c88ef88cd0bae896c2e49f692d29e992f6fd261c8f7aaf96fadde55de6cdaa.exe
1556	e4c88ef88cd0bae896c2e49f692d29e992f6fd261c8f7aaf96fadde55de6cdaa.exe
1556	e4c88ef88cd0bae896c2e49f692d29e992f6fd261c8f7aaf96fadde55de6cdaa.exe
1556	e4c88ef88cd0bae896c2e49f692d29e992f6fd261c8f7aaf96fadde55de6cdaa.exe
2152	syncUpd.exe
2152	syncUpd.exe
1784	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 6 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x00050000000194ef-25.dat	upx
behavioral1/files/0x00050000000194ef-29.dat	upx
behavioral1/memory/1556-33-0x0000000004D30000-0x0000000005260000-memory.dmp	upx
behavioral1/memory/2492-34-0x0000000000400000-0x0000000000930000-memory.dmp	upx
behavioral1/memory/2492-83-0x0000000000400000-0x0000000000930000-memory.dmp	upx
behavioral1/memory/2492-162-0x0000000000400000-0x0000000000930000-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-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Windows\CurrentVersion\Run\Ledger-Live Updater = "C:\\Users\\Admin\\AppData\\Local\\Temp\\EGCFIDAFBF.exe"	EGCFIDAFBF.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
1736	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1304	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2152	syncUpd.exe
2152	syncUpd.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe
548	EGCFIDAFBF.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	548	EGCFIDAFBF.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2492	BroomSetup.exe

Suspicious use of WriteProcessMemory 43 IoCs

description	pid	Process	procid_target
PID 1556 wrote to memory of 2152	1556	e4c88ef88cd0bae896c2e49f692d29e992f6fd261c8f7aaf96fadde55de6cdaa.exe	28
PID 1556 wrote to memory of 2152	1556	e4c88ef88cd0bae896c2e49f692d29e992f6fd261c8f7aaf96fadde55de6cdaa.exe	28
PID 1556 wrote to memory of 2152	1556	e4c88ef88cd0bae896c2e49f692d29e992f6fd261c8f7aaf96fadde55de6cdaa.exe	28
PID 1556 wrote to memory of 2152	1556	e4c88ef88cd0bae896c2e49f692d29e992f6fd261c8f7aaf96fadde55de6cdaa.exe	28
PID 1556 wrote to memory of 2492	1556	e4c88ef88cd0bae896c2e49f692d29e992f6fd261c8f7aaf96fadde55de6cdaa.exe	30
PID 1556 wrote to memory of 2492	1556	e4c88ef88cd0bae896c2e49f692d29e992f6fd261c8f7aaf96fadde55de6cdaa.exe	30
PID 1556 wrote to memory of 2492	1556	e4c88ef88cd0bae896c2e49f692d29e992f6fd261c8f7aaf96fadde55de6cdaa.exe	30
PID 1556 wrote to memory of 2492	1556	e4c88ef88cd0bae896c2e49f692d29e992f6fd261c8f7aaf96fadde55de6cdaa.exe	30
PID 1556 wrote to memory of 2492	1556	e4c88ef88cd0bae896c2e49f692d29e992f6fd261c8f7aaf96fadde55de6cdaa.exe	30
PID 1556 wrote to memory of 2492	1556	e4c88ef88cd0bae896c2e49f692d29e992f6fd261c8f7aaf96fadde55de6cdaa.exe	30
PID 1556 wrote to memory of 2492	1556	e4c88ef88cd0bae896c2e49f692d29e992f6fd261c8f7aaf96fadde55de6cdaa.exe	30
PID 2492 wrote to memory of 604	2492	BroomSetup.exe	33
PID 2492 wrote to memory of 604	2492	BroomSetup.exe	33
PID 2492 wrote to memory of 604	2492	BroomSetup.exe	33
PID 2492 wrote to memory of 604	2492	BroomSetup.exe	33
PID 604 wrote to memory of 2148	604	cmd.exe	35
PID 604 wrote to memory of 2148	604	cmd.exe	35
PID 604 wrote to memory of 2148	604	cmd.exe	35
PID 604 wrote to memory of 2148	604	cmd.exe	35
PID 604 wrote to memory of 1736	604	cmd.exe	36
PID 604 wrote to memory of 1736	604	cmd.exe	36
PID 604 wrote to memory of 1736	604	cmd.exe	36
PID 604 wrote to memory of 1736	604	cmd.exe	36
PID 2152 wrote to memory of 1784	2152	syncUpd.exe	37
PID 2152 wrote to memory of 1784	2152	syncUpd.exe	37
PID 2152 wrote to memory of 1784	2152	syncUpd.exe	37
PID 2152 wrote to memory of 1784	2152	syncUpd.exe	37
PID 2152 wrote to memory of 2440	2152	syncUpd.exe	39
PID 2152 wrote to memory of 2440	2152	syncUpd.exe	39
PID 2152 wrote to memory of 2440	2152	syncUpd.exe	39
PID 2152 wrote to memory of 2440	2152	syncUpd.exe	39
PID 1784 wrote to memory of 548	1784	cmd.exe	41
PID 1784 wrote to memory of 548	1784	cmd.exe	41
PID 1784 wrote to memory of 548	1784	cmd.exe	41
PID 1784 wrote to memory of 548	1784	cmd.exe	41
PID 548 wrote to memory of 1896	548	EGCFIDAFBF.exe	42
PID 548 wrote to memory of 1896	548	EGCFIDAFBF.exe	42
PID 548 wrote to memory of 1896	548	EGCFIDAFBF.exe	42
PID 548 wrote to memory of 1896	548	EGCFIDAFBF.exe	42
PID 1896 wrote to memory of 1304	1896	cmd.exe	44
PID 1896 wrote to memory of 1304	1896	cmd.exe	44
PID 1896 wrote to memory of 1304	1896	cmd.exe	44
PID 1896 wrote to memory of 1304	1896	cmd.exe	44

C:\Users\Admin\AppData\Local\Temp\e4c88ef88cd0bae896c2e49f692d29e992f6fd261c8f7aaf96fadde55de6cdaa.exe
"C:\Users\Admin\AppData\Local\Temp\e4c88ef88cd0bae896c2e49f692d29e992f6fd261c8f7aaf96fadde55de6cdaa.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1556
- 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
  - Suspicious use of WriteProcessMemory
  PID:2152
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\EGCFIDAFBF.exe"
    3⤵
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:1784
  - - C:\Users\Admin\AppData\Local\Temp\EGCFIDAFBF.exe
      "C:\Users\Admin\AppData\Local\Temp\EGCFIDAFBF.exe"
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:548
    - - 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\EGCFIDAFBF.exe
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:1896
      - C:\Windows\SysWOW64\PING.EXE
        
        ping 2.2.2.2 -n 1 -w 3000
        6⤵
        Runs ping.exe
        
        PID:1304
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\AAFIIJDAAA.exe"
    3⤵
    PID:2440
- 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:2492
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Roaming\Temp\Task.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:604
  - - C:\Windows\SysWOW64\chcp.com
      chcp 1251
      4⤵
      PID:2148
  - - 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:1736

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\BroomSetup.exe

Filesize
248KB

MD5
7890c442f2bc61f969ec0c52a48b9410

SHA1
a62c2ad350ef0573e2f336906f0675ce91fbd20c

SHA256
2e35afd3cc8016157061624bff4aebd7ed16ec3b89877433ed660e2dc7e3b9d1

SHA512
17645e15d73ec17955134977a6909562640fb7e0d6197528ed7804372a1761f65d5d01163a86579477e470667257566762af51587390331a1ffbec09159157c8

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

Filesize
293KB

MD5
7cce8ab1361b5b7ece51c04d82c69617

SHA1
0033f361e8d6da2134de34ea3921f4daa844e417

SHA256
efc871d0543c1fa1e36afc8daf60e75418b8b1a7dc03fbdf1b8059167b0f1a6a

SHA512
74d9e152396700b48346e0472cad13151cb1634fab4e48b99aa114fcef15cbca2d0a5f8181703f812477bf609c2d796b100713a6c117f11681d20bceeb1367cc

Download Submit
\Users\Admin\AppData\Local\Temp\nstAB3F.tmp\INetC.dll

Filesize
21KB

MD5
2b342079303895c50af8040a91f30f71

SHA1
b11335e1cb8356d9c337cb89fe81d669a69de17e

SHA256
2d5d89025911e2e273f90f393624be4819641dbee1606de792362e442e54612f

SHA512
550452dadc86ecd205f40668894116790a456fe46e9985d68093d36cf32abf00edecb5c56ff0287464a0e819db7b3cc53926037a116de6c651332a7cc8035d47

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

Filesize
200KB

MD5
c722591f624fb69970f246b8c81d830f

SHA1
85516decea5d6987bebe39cbadf36053beaf4bb0

SHA256
13cd1152a19fdac6581cac2bd822f34bd3026ea1783ff231e299b6d28c046a6a

SHA512
822584c5c8a0813af4d845e80919776c71a43464ab719d1c303ebaae6a8ed47763183566bedc9be2e8c44de8ee6fd62d1e12be471e5d5c73ae4b1dcdaa34a908

Download Submit
memory/548-164-0x0000000071BB0000-0x000000007229E000-memory.dmp

Filesize
6.9MB

Download
memory/548-150-0x0000000001080000-0x000000000109E000-memory.dmp

Filesize
120KB

Download
memory/548-152-0x0000000071BB0000-0x000000007229E000-memory.dmp

Filesize
6.9MB

Download
memory/548-157-0x00000000008F0000-0x0000000000930000-memory.dmp

Filesize
256KB

Download
memory/548-166-0x00000000008F0000-0x0000000000930000-memory.dmp

Filesize
256KB

Download
memory/1556-32-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/1556-33-0x0000000004D30000-0x0000000005260000-memory.dmp

Filesize
5.2MB

Download
memory/2152-65-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2152-36-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/2152-116-0x0000000000760000-0x0000000000860000-memory.dmp

Filesize
1024KB

Download
memory/2152-16-0x0000000000760000-0x0000000000860000-memory.dmp

Filesize
1024KB

Download
memory/2152-17-0x0000000000230000-0x0000000000257000-memory.dmp

Filesize
156KB

Download
memory/2152-110-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2152-19-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2152-85-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2152-86-0x0000000000230000-0x0000000000257000-memory.dmp

Filesize
156KB

Download
memory/2152-84-0x0000000000760000-0x0000000000860000-memory.dmp

Filesize
1024KB

Download
memory/2152-114-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2440-153-0x0000000002200000-0x0000000002201000-memory.dmp

Filesize
4KB

Download
memory/2492-34-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/2492-111-0x0000000000250000-0x0000000000251000-memory.dmp

Filesize
4KB

Download
memory/2492-162-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/2492-35-0x0000000000250000-0x0000000000251000-memory.dmp

Filesize
4KB

Download
memory/2492-83-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download