stealc | 6e3dd40e0b075c2923e5c22f626ecfd3f834d67ed5a4bf8566cbca237b17099e

Analysis

max time kernel
143s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
12-03-2024 20:40

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General

Target

6e3dd40e0b075c2923e5c22f626ecfd3f834d67ed5a4bf8566cbca237b17099e.exe
Size

2.0MB
MD5

6514da97c886643e8a11aab5de2ff260
SHA1

5c44732e2d80589ff2fe200c4f1d42413bb7cd90
SHA256

6e3dd40e0b075c2923e5c22f626ecfd3f834d67ed5a4bf8566cbca237b17099e
SHA512

5ceb952d5d42909e4bbabeb85e97ae675422cafa036ece6bf2480b7b0c99e96e146a0b25f530a03587268bc7ac8fe0feb4ef8f0b88b683142ba2a57f173fb8d0
SSDEEP

49152:L+2pACZOF2mcZQreTgZ77uNju4ojULKXKA8:S2i8OF2hQqUZXuN62KXKj

Score

10^/10

stealc discovery 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

Processes:

syncUpd.execmd.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	syncUpd.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	cmd.exe

Executes dropped EXE 2 IoCs

Processes:

syncUpd.exeBroomSetup.exe

pid process

2876 syncUpd.exe
3284 BroomSetup.exe

pid	process
2876	syncUpd.exe
3284	BroomSetup.exe

Loads dropped DLL 5 IoCs

Processes:

6e3dd40e0b075c2923e5c22f626ecfd3f834d67ed5a4bf8566cbca237b17099e.exesyncUpd.exe

pid	process
4832	6e3dd40e0b075c2923e5c22f626ecfd3f834d67ed5a4bf8566cbca237b17099e.exe
4832	6e3dd40e0b075c2923e5c22f626ecfd3f834d67ed5a4bf8566cbca237b17099e.exe
4832	6e3dd40e0b075c2923e5c22f626ecfd3f834d67ed5a4bf8566cbca237b17099e.exe
2876	syncUpd.exe
2876	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

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\BroomSetup.exe	upx
behavioral2/memory/3284-36-0x0000000000400000-0x0000000000930000-memory.dmp	upx
behavioral2/memory/3284-84-0x0000000000400000-0x0000000000930000-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
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

3 api.ipify.org
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

flow	ioc
3	api.ipify.org

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

Processes:

syncUpd.exe

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

Processes:

schtasks.exe

pid process

3004 schtasks.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

syncUpd.exe

pid process

2876 syncUpd.exe
2876 syncUpd.exe
2876 syncUpd.exe
2876 syncUpd.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

BroomSetup.execmd.exe

pid process

3284 BroomSetup.exe
3980 cmd.exe

pid	process
3004	schtasks.exe

pid	process
2876	syncUpd.exe
2876	syncUpd.exe
2876	syncUpd.exe
2876	syncUpd.exe

pid	process
3284	BroomSetup.exe
3980	cmd.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

6e3dd40e0b075c2923e5c22f626ecfd3f834d67ed5a4bf8566cbca237b17099e.exeBroomSetup.execmd.exesyncUpd.exe

description	pid	process	target process
PID 4832 wrote to memory of 2876	4832	6e3dd40e0b075c2923e5c22f626ecfd3f834d67ed5a4bf8566cbca237b17099e.exe	syncUpd.exe
PID 4832 wrote to memory of 2876	4832	6e3dd40e0b075c2923e5c22f626ecfd3f834d67ed5a4bf8566cbca237b17099e.exe	syncUpd.exe
PID 4832 wrote to memory of 2876	4832	6e3dd40e0b075c2923e5c22f626ecfd3f834d67ed5a4bf8566cbca237b17099e.exe	syncUpd.exe
PID 4832 wrote to memory of 3284	4832	6e3dd40e0b075c2923e5c22f626ecfd3f834d67ed5a4bf8566cbca237b17099e.exe	BroomSetup.exe
PID 4832 wrote to memory of 3284	4832	6e3dd40e0b075c2923e5c22f626ecfd3f834d67ed5a4bf8566cbca237b17099e.exe	BroomSetup.exe
PID 4832 wrote to memory of 3284	4832	6e3dd40e0b075c2923e5c22f626ecfd3f834d67ed5a4bf8566cbca237b17099e.exe	BroomSetup.exe
PID 3284 wrote to memory of 3184	3284	BroomSetup.exe	cmd.exe
PID 3284 wrote to memory of 3184	3284	BroomSetup.exe	cmd.exe
PID 3284 wrote to memory of 3184	3284	BroomSetup.exe	cmd.exe
PID 3184 wrote to memory of 1812	3184	cmd.exe	chcp.com
PID 3184 wrote to memory of 1812	3184	cmd.exe	chcp.com
PID 3184 wrote to memory of 1812	3184	cmd.exe	chcp.com
PID 3184 wrote to memory of 3004	3184	cmd.exe	schtasks.exe
PID 3184 wrote to memory of 3004	3184	cmd.exe	schtasks.exe
PID 3184 wrote to memory of 3004	3184	cmd.exe	schtasks.exe
PID 2876 wrote to memory of 3980	2876	syncUpd.exe	cmd.exe
PID 2876 wrote to memory of 3980	2876	syncUpd.exe	cmd.exe
PID 2876 wrote to memory of 3980	2876	syncUpd.exe	cmd.exe

C:\Users\Admin\AppData\Local\Temp\6e3dd40e0b075c2923e5c22f626ecfd3f834d67ed5a4bf8566cbca237b17099e.exe
"C:\Users\Admin\AppData\Local\Temp\6e3dd40e0b075c2923e5c22f626ecfd3f834d67ed5a4bf8566cbca237b17099e.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:4832
- 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:2876
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\JJJECFIECB.exe"
    3⤵
    - Checks computer location settings
    - Suspicious use of SetWindowsHookEx
    PID:3980
- 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:3284
- - 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:3184
  - - C:\Windows\SysWOW64\chcp.com
      chcp 1251
      4⤵
      PID:1812
  - - 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:3004

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

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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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
124KB

MD5
5dd55731fa673230acec6719e68f8740

SHA1
6396e320061e517bfddcc5205f7d5b29926e8965

SHA256
71765b7e95e7aba7b0ae40266ffc28b117c737ab68e4da5556577c9ac4515ef5

SHA512
5abe4595a984bf62c9206d38350c1f1e8b9b17e762653583c27c85a33c21e30493241b38cbcafe0b8f62fc564e65da19656ad2cef47927dea16cd8594fb45d90

Download Submit
C:\ProgramData\mozglue.dll

Filesize
32KB

MD5
adf245504e42a7b0324aa23b9c4e3dfb

SHA1
276fb02cda57dd30843e85d940a437f6025b5828

SHA256
6efeb120ce498593cd20dd455a97aae843d3f93cbf19455985ed1af68d2e2a32

SHA512
dcbef99dda9e708ccd235a3e024ccf25c1c2d9a6b6d3f1a74ab68ccce5e5dd225548252a37fe5d0bc9601e8705880f62ad54f4791236adf97dfbd4ad494904ab

Download Submit
C:\ProgramData\nss3.dll

Filesize
104KB

MD5
e7330cf90fa6abdb5f75871789ccae48

SHA1
ef2c719084226d8134f2c55c111d012546b3620b

SHA256
0cf8f0c294b07d834a88f95a06aede06bd842ff7c4e6ec1886beab414c4bdafc

SHA512
f1001c6558e8e36f0b16d85e0375062b7c386e2ff528c729d645a0c7da5a4cc89e7064525d2399d50be527224b3b3a62190407d50ae6250929fa56009674c5f4

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

Filesize
1.7MB

MD5
eee5ddcffbed16222cac0a1b4e2e466e

SHA1
28b40c88b8ea50b0782e2bcbb4cc0f411035f3d5

SHA256
2a40e5dccc7526c4982334941c90f95374460e2a816e84e724e98c4d52ae8c54

SHA512
8f88901f3ebd425818db09f268df19ccf8a755603f04e9481bcf02b112a84393f8a900ead77f8f971bfa33fd9fa5636b7494aaee864a0fb04e3273911a4216dc

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

Filesize
87KB

MD5
f6c2054bfc386041db1169b0a3f7c9e3

SHA1
8260f6d8a1330091ed5c29574caba8d74517075e

SHA256
de8b67da4825b85a693b18704b0110bd31350d6fa9b8306711ecf726bfa6f8fa

SHA512
94b6cb29964c165d036b0298345370e38f61342b6ad4671997d8e7d396cd0f103d0b03a5fae7b371e8e7a95c67bd462b6c9ba0c7036cda6cabf26f615556f9e4

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsm3E83.tmp\INetC.dll

Filesize
21KB

MD5
2b342079303895c50af8040a91f30f71

SHA1
b11335e1cb8356d9c337cb89fe81d669a69de17e

SHA256
2d5d89025911e2e273f90f393624be4819641dbee1606de792362e442e54612f

SHA512
550452dadc86ecd205f40668894116790a456fe46e9985d68093d36cf32abf00edecb5c56ff0287464a0e819db7b3cc53926037a116de6c651332a7cc8035d47

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

Filesize
200KB

MD5
c722591f624fb69970f246b8c81d830f

SHA1
85516decea5d6987bebe39cbadf36053beaf4bb0

SHA256
13cd1152a19fdac6581cac2bd822f34bd3026ea1783ff231e299b6d28c046a6a

SHA512
822584c5c8a0813af4d845e80919776c71a43464ab719d1c303ebaae6a8ed47763183566bedc9be2e8c44de8ee6fd62d1e12be471e5d5c73ae4b1dcdaa34a908

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

Filesize
128B

MD5
11bb3db51f701d4e42d3287f71a6a43e

SHA1
63a4ee82223be6a62d04bdfe40ef8ba91ae49a86

SHA256
6be22058abfb22b40a42fb003f86b89e204a83024c03eb82cd53e2a0a047c331

SHA512
907ad2c070cc1db89f43459a94d7f48985d939d749c9648b78572a266f0d3fde47813a129e9151dbf4a7d96d36f588172f57c88b8b947b56ed818d7d068abab2

Download Submit
memory/2876-35-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2876-34-0x00000000007B0000-0x00000000007D7000-memory.dmp

Filesize
156KB

Download
memory/2876-83-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2876-31-0x0000000000930000-0x0000000000A30000-memory.dmp

Filesize
1024KB

Download
memory/2876-88-0x0000000000930000-0x0000000000A30000-memory.dmp

Filesize
1024KB

Download
memory/2876-92-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2876-93-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2876-147-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2876-126-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2876-41-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/3284-36-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/3284-37-0x0000000000AF0000-0x0000000000AF1000-memory.dmp

Filesize
4KB

Download
memory/3284-95-0x0000000000AF0000-0x0000000000AF1000-memory.dmp

Filesize
4KB

Download
memory/3284-84-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/4832-32-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download