Malware Analysis Report

2024-10-23 19:20

Sample ID 231020-eff28sfc34
Target build.exe
SHA256 a1d070e57e5d9002274f814372596fd59e4ed49ec373020c45ec2ed1f8bf847d
Tags
stealerium stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

a1d070e57e5d9002274f814372596fd59e4ed49ec373020c45ec2ed1f8bf847d

Threat Level: Known bad

The file build.exe was found to be: Known bad.

Malicious Activity Summary

stealerium stealer

Stealerium

Stealerium family

Checks computer location settings

Enumerates physical storage devices

Unsigned PE

Delays execution with timeout.exe

Kills process with taskkill

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-10-20 03:52

Signatures

Stealerium family

stealerium

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-10-20 03:52

Reported

2023-10-20 04:22

Platform

win7-20230831-en

Max time kernel

1566s

Max time network

1569s

Command Line

"C:\Users\Admin\AppData\Local\Temp\build.exe"

Signatures

Stealerium

stealer stealerium

Enumerates physical storage devices

Delays execution with timeout.exe

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\timeout.exe N/A

Kills process with taskkill

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\taskkill.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\build.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\build.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\taskkill.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1596 wrote to memory of 2524 N/A C:\Users\Admin\AppData\Local\Temp\build.exe C:\Windows\SysWOW64\cmd.exe
PID 1596 wrote to memory of 2524 N/A C:\Users\Admin\AppData\Local\Temp\build.exe C:\Windows\SysWOW64\cmd.exe
PID 1596 wrote to memory of 2524 N/A C:\Users\Admin\AppData\Local\Temp\build.exe C:\Windows\SysWOW64\cmd.exe
PID 1596 wrote to memory of 2524 N/A C:\Users\Admin\AppData\Local\Temp\build.exe C:\Windows\SysWOW64\cmd.exe
PID 2524 wrote to memory of 2556 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\chcp.com
PID 2524 wrote to memory of 2556 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\chcp.com
PID 2524 wrote to memory of 2556 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\chcp.com
PID 2524 wrote to memory of 2556 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\chcp.com
PID 2524 wrote to memory of 2580 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 2524 wrote to memory of 2580 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 2524 wrote to memory of 2580 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 2524 wrote to memory of 2580 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 2524 wrote to memory of 1156 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 2524 wrote to memory of 1156 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 2524 wrote to memory of 1156 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 2524 wrote to memory of 1156 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe

Processes

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

"C:\Users\Admin\AppData\Local\Temp\build.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /C C:\Users\Admin\AppData\Local\Temp\tmp59DB.tmp.bat

C:\Windows\SysWOW64\chcp.com

chcp 65001

C:\Windows\SysWOW64\taskkill.exe

TaskKill /F /IM 1596

C:\Windows\SysWOW64\timeout.exe

Timeout /T 2 /Nobreak

Network

Country Destination Domain Proto
US 8.8.8.8:53 canary.discord.com udp
US 162.159.137.232:443 canary.discord.com tcp

Files

memory/1596-1-0x00000000748E0000-0x0000000074FCE000-memory.dmp

memory/1596-0-0x0000000000B70000-0x0000000000D02000-memory.dmp

memory/1596-2-0x0000000004AE0000-0x0000000004B20000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\Cab5717.tmp

MD5 f3441b8572aae8801c04f3060b550443
SHA1 4ef0a35436125d6821831ef36c28ffaf196cda15
SHA256 6720349e7d82ee0a8e73920d3c2b7cb2912d9fcf2edb6fd98f2f12820158b0bf
SHA512 5ba01ba421b50030e380ae6bbcd2f681f2a91947fe7fedb3c8e6b5f24dce9517abf57b1cf26cc6078d4bb53bde6fcfb2561591337c841f8f2cb121a3d71661b9

C:\Users\Admin\AppData\Local\Temp\Tar5797.tmp

MD5 9441737383d21192400eca82fda910ec
SHA1 725e0d606a4fc9ba44aa8ffde65bed15e65367e4
SHA256 bc3a6e84e41faeb57e7c21aa3b60c2a64777107009727c5b7c0ed8fe658909e5
SHA512 7608dd653a66cd364392a78d4711b48d1707768d36996e4d38871c6843b5714e1d7da4b4cc6db969e6000cfa182bcb74216ef6823d1063f036fc5c3413fb8dcf

memory/1596-37-0x00000000748E0000-0x0000000074FCE000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp59DB.tmp.bat

MD5 9cc15ed957db45f77c91b55ac7b568e0
SHA1 8f1a1641022c3a4cd6ee245d5fcd1a06dea99b8e
SHA256 9155cc5f3d597f636169a7bdd84119f84495837809937a170e1bf2170eea0e65
SHA512 d0d8eb140050f40643774b21e23ba72fdb8274335d53da2e4db605a2b6d622d291e31bfc5a8494bce5890945fd54a1d5761436b22ff33542732e84261db3bf6b

memory/1596-40-0x00000000748E0000-0x0000000074FCE000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-10-20 03:52

Reported

2023-10-20 04:23

Platform

win10v2004-20230915-en

Max time kernel

1738s

Max time network

1173s

Command Line

"C:\Users\Admin\AppData\Local\Temp\build.exe"

Signatures

Stealerium

stealer stealerium

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-919254492-3979293997-764407192-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\build.exe N/A
Key value queried \REGISTRY\USER\S-1-5-21-919254492-3979293997-764407192-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\build.exe N/A
Key value queried \REGISTRY\USER\S-1-5-21-919254492-3979293997-764407192-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\build.exe N/A

Enumerates physical storage devices

Delays execution with timeout.exe

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\timeout.exe N/A
N/A N/A C:\Windows\SysWOW64\timeout.exe N/A
N/A N/A C:\Windows\SysWOW64\timeout.exe N/A

Kills process with taskkill

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\taskkill.exe N/A
N/A N/A C:\Windows\SysWOW64\taskkill.exe N/A
N/A N/A C:\Windows\SysWOW64\taskkill.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\build.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\build.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\build.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\build.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\taskkill.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\build.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\taskkill.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\build.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\build.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\taskkill.exe N/A
Token: SeManageVolumePrivilege N/A C:\Windows\System32\svchost.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2776 wrote to memory of 4792 N/A C:\Users\Admin\AppData\Local\Temp\build.exe C:\Windows\SysWOW64\cmd.exe
PID 2776 wrote to memory of 4792 N/A C:\Users\Admin\AppData\Local\Temp\build.exe C:\Windows\SysWOW64\cmd.exe
PID 2776 wrote to memory of 4792 N/A C:\Users\Admin\AppData\Local\Temp\build.exe C:\Windows\SysWOW64\cmd.exe
PID 4792 wrote to memory of 2392 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\chcp.com
PID 4792 wrote to memory of 2392 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\chcp.com
PID 4792 wrote to memory of 2392 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\chcp.com
PID 4792 wrote to memory of 3780 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 4792 wrote to memory of 3780 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 4792 wrote to memory of 3780 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 4792 wrote to memory of 4976 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 4792 wrote to memory of 4976 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 4792 wrote to memory of 4976 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 2960 wrote to memory of 1440 N/A C:\Users\Admin\AppData\Local\Temp\build.exe C:\Windows\SysWOW64\cmd.exe
PID 2960 wrote to memory of 1440 N/A C:\Users\Admin\AppData\Local\Temp\build.exe C:\Windows\SysWOW64\cmd.exe
PID 2960 wrote to memory of 1440 N/A C:\Users\Admin\AppData\Local\Temp\build.exe C:\Windows\SysWOW64\cmd.exe
PID 1440 wrote to memory of 2020 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\chcp.com
PID 1440 wrote to memory of 2020 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\chcp.com
PID 1440 wrote to memory of 2020 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\chcp.com
PID 1440 wrote to memory of 3664 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 1440 wrote to memory of 3664 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 1440 wrote to memory of 3664 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 1440 wrote to memory of 3412 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 1440 wrote to memory of 3412 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 1440 wrote to memory of 3412 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 4484 wrote to memory of 2944 N/A C:\Users\Admin\AppData\Local\Temp\build.exe C:\Windows\SysWOW64\cmd.exe
PID 4484 wrote to memory of 2944 N/A C:\Users\Admin\AppData\Local\Temp\build.exe C:\Windows\SysWOW64\cmd.exe
PID 4484 wrote to memory of 2944 N/A C:\Users\Admin\AppData\Local\Temp\build.exe C:\Windows\SysWOW64\cmd.exe
PID 2944 wrote to memory of 4180 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\chcp.com
PID 2944 wrote to memory of 4180 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\chcp.com
PID 2944 wrote to memory of 4180 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\chcp.com
PID 2944 wrote to memory of 2688 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 2944 wrote to memory of 2688 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 2944 wrote to memory of 2688 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 2944 wrote to memory of 2392 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 2944 wrote to memory of 2392 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 2944 wrote to memory of 2392 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe

Processes

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

"C:\Users\Admin\AppData\Local\Temp\build.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /C C:\Users\Admin\AppData\Local\Temp\tmp856C.tmp.bat

C:\Windows\SysWOW64\chcp.com

chcp 65001

C:\Windows\SysWOW64\taskkill.exe

TaskKill /F /IM 2776

C:\Windows\SysWOW64\timeout.exe

Timeout /T 2 /Nobreak

C:\Windows\System32\rundll32.exe

C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding

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

"C:\Users\Admin\AppData\Local\Temp\build.exe"

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

"C:\Users\Admin\AppData\Local\Temp\build.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /C C:\Users\Admin\AppData\Local\Temp\tmpBB8F.tmp.bat

C:\Windows\SysWOW64\chcp.com

chcp 65001

C:\Windows\SysWOW64\taskkill.exe

TaskKill /F /IM 2960

C:\Windows\SysWOW64\timeout.exe

Timeout /T 2 /Nobreak

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

"C:\Users\Admin\AppData\Local\Temp\build.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /C C:\Users\Admin\AppData\Local\Temp\tmpEEB5.tmp.bat

C:\Windows\SysWOW64\chcp.com

chcp 65001

C:\Windows\SysWOW64\taskkill.exe

TaskKill /F /IM 4484

C:\Windows\SysWOW64\timeout.exe

Timeout /T 2 /Nobreak

C:\Windows\system32\rundll32.exe

"C:\Windows\system32\rundll32.exe" "C:\Windows\SYSTEM32\EDGEHTML.dll",#141 Microsoft.VCLibs.140.00_8wekyb3d8bbwe

C:\Windows\System32\svchost.exe

C:\Windows\System32\svchost.exe -k UnistackSvcGroup

Network

Country Destination Domain Proto
US 8.8.8.8:53 2.136.104.51.in-addr.arpa udp
US 8.8.8.8:53 8.3.197.209.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 2.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 canary.discord.com udp
US 162.159.137.232:443 canary.discord.com tcp
US 8.8.8.8:53 232.137.159.162.in-addr.arpa udp
US 8.8.8.8:53 59.128.231.4.in-addr.arpa udp
US 162.159.137.232:443 canary.discord.com tcp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 162.159.137.232:443 canary.discord.com tcp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 252.15.104.51.in-addr.arpa udp
US 8.8.8.8:53 138.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 29.81.57.23.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 135.1.85.104.in-addr.arpa udp
US 8.8.8.8:53 119.110.54.20.in-addr.arpa udp

Files

memory/2776-0-0x0000000000AF0000-0x0000000000C82000-memory.dmp

memory/2776-1-0x00000000743F0000-0x0000000074BA0000-memory.dmp

memory/2776-2-0x0000000005650000-0x00000000056B6000-memory.dmp

memory/2776-3-0x0000000005640000-0x0000000005650000-memory.dmp

memory/2776-4-0x00000000743F0000-0x0000000074BA0000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp856C.tmp.bat

MD5 36460a086817968f4a4924cf9862a7d5
SHA1 e4d9bd8c66c59128e919d7c799a9f1b5cabd63e1
SHA256 82f70785f17d0dce2388340c654067c247ce5b37aff0fa1eeb9181380aad9f1c
SHA512 10bc936392c487c8cfe0a6a481f80ddfaa7a79497296ee431b880ac829a11efe0df19fce2bfe8de366436b2d5436c32edccb666d4d8c4ecde0a2ab6b2b61cb71

memory/2776-7-0x00000000743F0000-0x0000000074BA0000-memory.dmp

memory/2960-8-0x0000000074490000-0x0000000074C40000-memory.dmp

memory/2960-9-0x0000000005340000-0x0000000005350000-memory.dmp

memory/4484-10-0x0000000074490000-0x0000000074C40000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmpBB8F.tmp.bat

MD5 5952ea205e38a6759603e9dfbfe89986
SHA1 bd5be120e84a4854e02ad5daa8749a3b2192e46b
SHA256 04f75331e9adb0502aae51a587ab7e88c82f92e20d9e79f5ae732c3ec438af87
SHA512 83fe6492544716237244bfa13d7053924180fb1b4ec8601acd3afee0b4de50d0268e49a59bbc72db84fa7fbe15680710745d852f3a69b90e6d4f88711e2e25bd

memory/4484-13-0x0000000005160000-0x0000000005170000-memory.dmp

memory/2960-14-0x0000000074490000-0x0000000074C40000-memory.dmp

memory/4484-15-0x0000000074490000-0x0000000074C40000-memory.dmp

memory/4476-16-0x0000000074490000-0x0000000074C40000-memory.dmp

memory/4484-17-0x0000000005160000-0x0000000005170000-memory.dmp

memory/4476-19-0x0000000074490000-0x0000000074C40000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmpEEB5.tmp.bat

MD5 6e5b41c630ab9c0c86a5e5c85b86c179
SHA1 e3e7f2566a7eae1c102776fe1574088a1b61792c
SHA256 42176faa51a463301e85d84a80eda9ee765ba1aa1822004fd8933d7553f40f03
SHA512 94334e600871dd90c9e8dcbe0c0bbb326644405ef16dbd9023513bfdd976131c846392ceb6a7fc24b73bc1a1d09b83ac009b4c2fa74703d34b55220f5d827c0f

memory/4484-22-0x0000000074490000-0x0000000074C40000-memory.dmp

memory/3732-23-0x000001B0FF140000-0x000001B0FF150000-memory.dmp

memory/3732-39-0x000001B0FF240000-0x000001B0FF250000-memory.dmp

memory/3732-55-0x000001B0FF530000-0x000001B0FF531000-memory.dmp

memory/3732-57-0x000001B0FF560000-0x000001B0FF561000-memory.dmp

memory/3732-58-0x000001B0FF560000-0x000001B0FF561000-memory.dmp

memory/3732-59-0x000001B0FF670000-0x000001B0FF671000-memory.dmp