stealc | f827176755b1c3464d158f68b4d78ab2a931e90e6149822b250703e2c4c067ed

Analysis

max time kernel
151s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
25-03-2024 11:00

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General

Target

f827176755b1c3464d158f68b4d78ab2a931e90e6149822b250703e2c4c067ed.exe
Size

408KB
MD5

d2322116de04a3833aa2d3431791c240
SHA1

9e39b19d03276d3c9333601475f0732e51930e5b
SHA256

f827176755b1c3464d158f68b4d78ab2a931e90e6149822b250703e2c4c067ed
SHA512

69a951e4289a0ea05b4a1758d40697850fb8f262c3ebeef8de79b5fd09e1d4aaa885ea70e9a4a3485182d95144e27aafc04bca2d18655aeb4d74f9c1420902e5
SSDEEP

6144:/1H8+BK9zWvI0hNCGhw4aslyj/hAIGUtyRy+Hv72KOUtaK/SxEniVW02:u+BK9zSUGIOI0RjHj2Kh/Sx7D2

Score

10^/10

stealc discovery spyware stealer upx

Malware Config

Extracted

Family

stealc

http://185.172.128.209

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 3 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-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation	f827176755b1c3464d158f68b4d78ab2a931e90e6149822b250703e2c4c067ed.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation	u1l0.0.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation	BAKEBFBAKK.exe

Executes dropped EXE 3 IoCs

pid	Process
976	u1l0.0.exe
4200	u1l0.1.exe
4744	BAKEBFBAKK.exe

Loads dropped DLL 2 IoCs

pid	Process
976	u1l0.0.exe
976	u1l0.0.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
behavioral1/files/0x000b0000000230f3-20.dat	upx
behavioral1/files/0x000b0000000230f3-25.dat	upx
behavioral1/memory/4200-26-0x0000000000400000-0x0000000000930000-memory.dmp	upx
behavioral1/memory/4200-78-0x0000000000400000-0x0000000000930000-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

Program crash 2 IoCs

pid	pid_target	Process	procid_target
2956	2052	WerFault.exe	93
4732	976	WerFault.exe	97

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	u1l0.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u1l0.0.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
880	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4844	PING.EXE

Suspicious behavior: EnumeratesProcesses 22 IoCs

pid	Process
976	u1l0.0.exe
976	u1l0.0.exe
976	u1l0.0.exe
976	u1l0.0.exe
976	u1l0.0.exe
976	u1l0.0.exe
976	u1l0.0.exe
976	u1l0.0.exe
976	u1l0.0.exe
976	u1l0.0.exe
976	u1l0.0.exe
976	u1l0.0.exe
976	u1l0.0.exe
976	u1l0.0.exe
976	u1l0.0.exe
976	u1l0.0.exe
976	u1l0.0.exe
976	u1l0.0.exe
976	u1l0.0.exe
976	u1l0.0.exe
976	u1l0.0.exe
976	u1l0.0.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4200	u1l0.1.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 2052 wrote to memory of 976	2052	f827176755b1c3464d158f68b4d78ab2a931e90e6149822b250703e2c4c067ed.exe	97
PID 2052 wrote to memory of 976	2052	f827176755b1c3464d158f68b4d78ab2a931e90e6149822b250703e2c4c067ed.exe	97
PID 2052 wrote to memory of 976	2052	f827176755b1c3464d158f68b4d78ab2a931e90e6149822b250703e2c4c067ed.exe	97
PID 2052 wrote to memory of 4200	2052	f827176755b1c3464d158f68b4d78ab2a931e90e6149822b250703e2c4c067ed.exe	99
PID 2052 wrote to memory of 4200	2052	f827176755b1c3464d158f68b4d78ab2a931e90e6149822b250703e2c4c067ed.exe	99
PID 2052 wrote to memory of 4200	2052	f827176755b1c3464d158f68b4d78ab2a931e90e6149822b250703e2c4c067ed.exe	99
PID 4200 wrote to memory of 2684	4200	u1l0.1.exe	105
PID 4200 wrote to memory of 2684	4200	u1l0.1.exe	105
PID 4200 wrote to memory of 2684	4200	u1l0.1.exe	105
PID 2684 wrote to memory of 1144	2684	cmd.exe	107
PID 2684 wrote to memory of 1144	2684	cmd.exe	107
PID 2684 wrote to memory of 1144	2684	cmd.exe	107
PID 2684 wrote to memory of 880	2684	cmd.exe	108
PID 2684 wrote to memory of 880	2684	cmd.exe	108
PID 2684 wrote to memory of 880	2684	cmd.exe	108
PID 976 wrote to memory of 1472	976	u1l0.0.exe	121
PID 976 wrote to memory of 1472	976	u1l0.0.exe	121
PID 976 wrote to memory of 1472	976	u1l0.0.exe	121
PID 1472 wrote to memory of 4744	1472	cmd.exe	124
PID 1472 wrote to memory of 4744	1472	cmd.exe	124
PID 1472 wrote to memory of 4744	1472	cmd.exe	124
PID 4744 wrote to memory of 2364	4744	BAKEBFBAKK.exe	127
PID 4744 wrote to memory of 2364	4744	BAKEBFBAKK.exe	127
PID 4744 wrote to memory of 2364	4744	BAKEBFBAKK.exe	127
PID 2364 wrote to memory of 4844	2364	cmd.exe	129
PID 2364 wrote to memory of 4844	2364	cmd.exe	129
PID 2364 wrote to memory of 4844	2364	cmd.exe	129

C:\Users\Admin\AppData\Local\Temp\f827176755b1c3464d158f68b4d78ab2a931e90e6149822b250703e2c4c067ed.exe
"C:\Users\Admin\AppData\Local\Temp\f827176755b1c3464d158f68b4d78ab2a931e90e6149822b250703e2c4c067ed.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2052
- C:\Users\Admin\AppData\Local\Temp\u1l0.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u1l0.0.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:976
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\BAKEBFBAKK.exe"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1472
  - - C:\Users\Admin\AppData\Local\Temp\BAKEBFBAKK.exe
      "C:\Users\Admin\AppData\Local\Temp\BAKEBFBAKK.exe"
      4⤵
      Checks computer location settings
      Executes dropped EXE
      Suspicious use of WriteProcessMemory
      PID:4744
    - - 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\BAKEBFBAKK.exe
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:2364
      - C:\Windows\SysWOW64\PING.EXE
        
        ping 2.2.2.2 -n 1 -w 3000
        6⤵
        Runs ping.exe
        
        PID:4844
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 976 -s 2536
    3⤵
    - Program crash
    PID:4732
- C:\Users\Admin\AppData\Local\Temp\u1l0.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u1l0.1.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4200
- - 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:2684
  - - C:\Windows\SysWOW64\chcp.com
      chcp 1251
      4⤵
      PID:1144
  - - 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:880
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2052 -s 1200
  2⤵
  - Program crash
  PID:2956

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2052 -ip 2052
1⤵
PID:2776

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --no-appcompat-clear --mojo-platform-channel-handle=2964 --field-trial-handle=2276,i,1205556100727695622,5044463180471657307,262144 --variations-seed-version /prefetch:3
1⤵
PID:1828

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3032 --field-trial-handle=2276,i,1205556100727695622,5044463180471657307,262144 --variations-seed-version /prefetch:8
1⤵
PID:4640

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 976 -ip 976
1⤵
PID:3824

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

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\Microsoft\Edge\User Data\Default\Network\SCT Auditing Pending Reports

Filesize
2B

MD5
d751713988987e9331980363e24189ce

SHA1
97d170e1550eee4afc0af065b78cda302a97674c

SHA256
4f53cda18c2baa0c0354bb5f9a3ecbe5ed12ab4d8e11ba873c2f11161202b945

SHA512
b25b294cb4deb69ea00a4c3cf3113904801b6015e5956bd019a8570b1fe1d6040e944ef3cdee16d0a46503ca6e659a25f21cf9ceddc13f352a3c98138c15d6af

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Network\Sdch Dictionaries

Filesize
40B

MD5
20d4b8fa017a12a108c87f540836e250

SHA1
1ac617fac131262b6d3ce1f52f5907e31d5f6f00

SHA256
6028bd681dbf11a0a58dde8a0cd884115c04caa59d080ba51bde1b086ce0079d

SHA512
507b2b8a8a168ff8f2bdafa5d9d341c44501a5f17d9f63f3d43bd586bc9e8ae33221887869fa86f845b7d067cb7d2a7009efd71dda36e03a40a74fee04b86856

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

Filesize
106KB

MD5
fe380780b5c35bd6d54541791151c2be

SHA1
7fe3a583cf91474c733f85cebf3c857682e269e1

SHA256
b64a84d1f88e4e78464a1901c1cb5bbd5f00bb73203d719e64e072157a087b53

SHA512
ba05ba8aa13c4bc1cf98fbf6c08b021e8b19354098e0397fc8e1e5d3dcce367c1063203f24e50d0973193f6535681d0a43486e5dade5d112853b7a2fe8739b6c

Download Submit
C:\Users\Admin\AppData\Local\Temp\u1l0.0.exe

Filesize
297KB

MD5
2e77b699db5a58964604a4ff4d64a517

SHA1
b78026b49a5a7519498faf09a420020c5a017965

SHA256
a952a2de1ab7613813385ab00a145fc7f0ee2d25e752d8f3c17b4f11250b21a9

SHA512
ca8d23b51f83eb8ce38292558e1f70cc0d1e0b9b9680bae3785530e66f76a41855ccf57bc84eb9751282e21b97f2b2302a66a9a1408395da9151029bb61c5278

Download Submit
C:\Users\Admin\AppData\Local\Temp\u1l0.1.exe

Filesize
1.7MB

MD5
eee5ddcffbed16222cac0a1b4e2e466e

SHA1
28b40c88b8ea50b0782e2bcbb4cc0f411035f3d5

SHA256
2a40e5dccc7526c4982334941c90f95374460e2a816e84e724e98c4d52ae8c54

SHA512
8f88901f3ebd425818db09f268df19ccf8a755603f04e9481bcf02b112a84393f8a900ead77f8f971bfa33fd9fa5636b7494aaee864a0fb04e3273911a4216dc

Download Submit
C:\Users\Admin\AppData\Local\Temp\u1l0.1.exe

Filesize
947KB

MD5
da0cf36c66e3068782b456244131eb58

SHA1
d6d41232b32772ae7805e8ee763043949686e2c9

SHA256
216d103c9cf76ad1e5dd2814138bbb23f17503f11af2fd424f5e4db13673e71b

SHA512
89503387cc2d4208f5b9230976cdda5228a27819bbe09b7665c3b5e93c90680128dc0126542d72ff6edc9a8c4b5ce15de1ae4ffece4a2cd806aad5515561378c

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

Filesize
128B

MD5
11bb3db51f701d4e42d3287f71a6a43e

SHA1
63a4ee82223be6a62d04bdfe40ef8ba91ae49a86

SHA256
6be22058abfb22b40a42fb003f86b89e204a83024c03eb82cd53e2a0a047c331

SHA512
907ad2c070cc1db89f43459a94d7f48985d939d749c9648b78572a266f0d3fde47813a129e9151dbf4a7d96d36f588172f57c88b8b947b56ed818d7d068abab2

Download Submit
memory/976-134-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/976-14-0x00000000006F0000-0x0000000000717000-memory.dmp

Filesize
156KB

Download
memory/976-156-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/976-32-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/976-120-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/976-77-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/976-13-0x0000000000750000-0x0000000000850000-memory.dmp

Filesize
1024KB

Download
memory/976-85-0x0000000000750000-0x0000000000850000-memory.dmp

Filesize
1024KB

Download
memory/976-15-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/976-94-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2052-2-0x0000000002330000-0x000000000239E000-memory.dmp

Filesize
440KB

Download
memory/2052-1-0x0000000000790000-0x0000000000890000-memory.dmp

Filesize
1024KB

Download
memory/2052-3-0x0000000000400000-0x000000000056A000-memory.dmp

Filesize
1.4MB

Download
memory/2052-28-0x0000000000400000-0x000000000056A000-memory.dmp

Filesize
1.4MB

Download
memory/4200-78-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/4200-116-0x0000000000FA0000-0x0000000000FA1000-memory.dmp

Filesize
4KB

Download
memory/4200-26-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/4200-27-0x0000000000FA0000-0x0000000000FA1000-memory.dmp

Filesize
4KB

Download
memory/4744-154-0x0000000071550000-0x0000000071D00000-memory.dmp

Filesize
7.7MB

Download
memory/4744-155-0x0000000000CF0000-0x0000000000D10000-memory.dmp

Filesize
128KB

Download
memory/4744-157-0x0000000005770000-0x0000000005780000-memory.dmp

Filesize
64KB

Download
memory/4744-160-0x0000000071550000-0x0000000071D00000-memory.dmp

Filesize
7.7MB

Download