stealc | 4b659ccb3ae045945d306403044e30da5b417b435acdecb21146710e3eda8d26

General

Target

4b659ccb3ae045945d306403044e30da5b417b435acdecb21146710e3eda8d26.exe
Size

2.0MB
MD5

cab661f62fc332029da71aefea6bb742
SHA1

9d93d8497af2a8b409fd6d5707189ee269442cb4
SHA256

4b659ccb3ae045945d306403044e30da5b417b435acdecb21146710e3eda8d26
SHA512

41ac57cec0119f59458d31b947d16ac37f9ffd3c4cca7ec28825f84be1beeb6202fc1e77d7dc7c6b6355ef2100676750071d978e519a61019eb76108a7968fcc
SSDEEP

49152:L1DW1Ak7+QhIU0WTtl1wBaJOUHZSvzpY2/nhqoDsP:hD67+LU0WTL1saJ9HZSvz+2ZqqM

Score

10^/10

stealc discovery spyware stealer upx

Malware Config

Extracted

Family

stealc

C2

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 2 IoCs

pid	Process
2820	syncUpd.exe
2408	BroomSetup.exe

Loads dropped DLL 6 IoCs

pid	Process
2488	4b659ccb3ae045945d306403044e30da5b417b435acdecb21146710e3eda8d26.exe
2488	4b659ccb3ae045945d306403044e30da5b417b435acdecb21146710e3eda8d26.exe
2488	4b659ccb3ae045945d306403044e30da5b417b435acdecb21146710e3eda8d26.exe
2488	4b659ccb3ae045945d306403044e30da5b417b435acdecb21146710e3eda8d26.exe
2488	4b659ccb3ae045945d306403044e30da5b417b435acdecb21146710e3eda8d26.exe
2820	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 6 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x0005000000019469-27.dat	upx
behavioral1/memory/2488-34-0x0000000004F80000-0x00000000054B0000-memory.dmp	upx
behavioral1/files/0x0005000000019469-36.dat	upx
behavioral1/memory/2408-39-0x0000000000400000-0x0000000000930000-memory.dmp	upx
behavioral1/memory/2408-80-0x0000000000400000-0x0000000000930000-memory.dmp	upx
behavioral1/memory/2408-122-0x0000000000400000-0x0000000000930000-memory.dmp	upx

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

Data from Local System
T1005

Credentials In Files
T1552.001
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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	syncUpd.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	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
2504	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2820	syncUpd.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2408	BroomSetup.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2488 wrote to memory of 2820	2488	4b659ccb3ae045945d306403044e30da5b417b435acdecb21146710e3eda8d26.exe	28
PID 2488 wrote to memory of 2820	2488	4b659ccb3ae045945d306403044e30da5b417b435acdecb21146710e3eda8d26.exe	28
PID 2488 wrote to memory of 2820	2488	4b659ccb3ae045945d306403044e30da5b417b435acdecb21146710e3eda8d26.exe	28
PID 2488 wrote to memory of 2820	2488	4b659ccb3ae045945d306403044e30da5b417b435acdecb21146710e3eda8d26.exe	28
PID 2488 wrote to memory of 2408	2488	4b659ccb3ae045945d306403044e30da5b417b435acdecb21146710e3eda8d26.exe	30
PID 2488 wrote to memory of 2408	2488	4b659ccb3ae045945d306403044e30da5b417b435acdecb21146710e3eda8d26.exe	30
PID 2488 wrote to memory of 2408	2488	4b659ccb3ae045945d306403044e30da5b417b435acdecb21146710e3eda8d26.exe	30
PID 2488 wrote to memory of 2408	2488	4b659ccb3ae045945d306403044e30da5b417b435acdecb21146710e3eda8d26.exe	30
PID 2488 wrote to memory of 2408	2488	4b659ccb3ae045945d306403044e30da5b417b435acdecb21146710e3eda8d26.exe	30
PID 2488 wrote to memory of 2408	2488	4b659ccb3ae045945d306403044e30da5b417b435acdecb21146710e3eda8d26.exe	30
PID 2488 wrote to memory of 2408	2488	4b659ccb3ae045945d306403044e30da5b417b435acdecb21146710e3eda8d26.exe	30
PID 2408 wrote to memory of 2728	2408	BroomSetup.exe	31
PID 2408 wrote to memory of 2728	2408	BroomSetup.exe	31
PID 2408 wrote to memory of 2728	2408	BroomSetup.exe	31
PID 2408 wrote to memory of 2728	2408	BroomSetup.exe	31
PID 2728 wrote to memory of 2752	2728	cmd.exe	33
PID 2728 wrote to memory of 2752	2728	cmd.exe	33
PID 2728 wrote to memory of 2752	2728	cmd.exe	33
PID 2728 wrote to memory of 2752	2728	cmd.exe	33
PID 2728 wrote to memory of 2504	2728	cmd.exe	34
PID 2728 wrote to memory of 2504	2728	cmd.exe	34
PID 2728 wrote to memory of 2504	2728	cmd.exe	34
PID 2728 wrote to memory of 2504	2728	cmd.exe	34

C:\Users\Admin\AppData\Local\Temp\4b659ccb3ae045945d306403044e30da5b417b435acdecb21146710e3eda8d26.exe
"C:\Users\Admin\AppData\Local\Temp\4b659ccb3ae045945d306403044e30da5b417b435acdecb21146710e3eda8d26.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2488
- 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
  PID:2820
- 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:2408
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Roaming\Temp\Task.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2728
  - - C:\Windows\SysWOW64\chcp.com
      chcp 1251
      4⤵
      PID:2752
  - - 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:2504

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Unsecured Credentials

3

T1552

Credentials In Files

3

T1552.001

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

3

T1005

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
1.5MB

MD5
2bb425f792e9b5a9d8a65b0aa5527749

SHA1
f49ccf2643925becece5e263c56737c853fdfd76

SHA256
b6627c534a33df14faf3d672c841b97d9e4c73f6110d52286de46a21553cfe92

SHA512
a45ee63945045427b5cd0c39fd0d411d87291729d61cac7bdf602908891569f6e666bc983042babe9c310365ef9d1a0381786d7c09ffcae1c86d10a95b354327

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

Filesize
128B

MD5
11bb3db51f701d4e42d3287f71a6a43e

SHA1
63a4ee82223be6a62d04bdfe40ef8ba91ae49a86

SHA256
6be22058abfb22b40a42fb003f86b89e204a83024c03eb82cd53e2a0a047c331

SHA512
907ad2c070cc1db89f43459a94d7f48985d939d749c9648b78572a266f0d3fde47813a129e9151dbf4a7d96d36f588172f57c88b8b947b56ed818d7d068abab2

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
1.5MB

MD5
51df2a6dfb5f0eb070235e724e1d5d2f

SHA1
fd1e92f43c400c1618380aa6b19413f6526eca92

SHA256
b821ae07396bad0a2d18c57bc584f37d859b8471ff528b3bb4f95149f0ea7d3e

SHA512
e6d64b798b8c55936b3ec9bbaeb8ab7ac442c5a9a91c76ae726e6391eccb05403f6b130ea5d9e875152daa33b1e95671d4428afb5dd791e2a1f6f17588f2d340

Download Submit
\Users\Admin\AppData\Local\Temp\nsj675D.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/2408-83-0x0000000000240000-0x0000000000241000-memory.dmp

Filesize
4KB

Download
memory/2408-80-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/2408-122-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/2408-39-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/2408-44-0x0000000000240000-0x0000000000241000-memory.dmp

Filesize
4KB

Download
memory/2488-34-0x0000000004F80000-0x00000000054B0000-memory.dmp

Filesize
5.2MB

Download
memory/2488-33-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/2488-19-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/2820-18-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2820-20-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2820-79-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2820-67-0x0000000000AA0000-0x0000000000BA0000-memory.dmp

Filesize
1024KB

Download
memory/2820-17-0x0000000000230000-0x0000000000257000-memory.dmp

Filesize
156KB

Download
memory/2820-102-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2820-16-0x0000000000AA0000-0x0000000000BA0000-memory.dmp

Filesize
1024KB

Download
memory/2820-115-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2820-121-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2820-35-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads