Malware Analysis Report

2024-09-22 21:54

Sample ID 240320-mh3b9aee48
Target d89300e103bfd617274ee22294bcc16c
SHA256 7d12860910f95752bab43166470d3ac6dd1b8be3599bae2fca48aa1d01d1034a
Tags
oski infostealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

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

7d12860910f95752bab43166470d3ac6dd1b8be3599bae2fca48aa1d01d1034a

Threat Level: Known bad

The file d89300e103bfd617274ee22294bcc16c was found to be: Known bad.

Malicious Activity Summary

oski infostealer

Oski

Suspicious use of SetThreadContext

Program crash

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix

N/A

Analysis: static1

Detonation Overview

Reported

2024-03-20 10:28

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-20 10:28

Reported

2024-03-20 10:31

Platform

win7-20240319-en

Max time kernel

117s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\d89300e103bfd617274ee22294bcc16c.exe"

Signatures

Oski

infostealer oski

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2980 set thread context of 2212 N/A C:\Users\Admin\AppData\Local\Temp\d89300e103bfd617274ee22294bcc16c.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\d89300e103bfd617274ee22294bcc16c.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\d89300e103bfd617274ee22294bcc16c.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\d89300e103bfd617274ee22294bcc16c.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2980 wrote to memory of 2212 N/A C:\Users\Admin\AppData\Local\Temp\d89300e103bfd617274ee22294bcc16c.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2980 wrote to memory of 2212 N/A C:\Users\Admin\AppData\Local\Temp\d89300e103bfd617274ee22294bcc16c.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2980 wrote to memory of 2212 N/A C:\Users\Admin\AppData\Local\Temp\d89300e103bfd617274ee22294bcc16c.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2980 wrote to memory of 2212 N/A C:\Users\Admin\AppData\Local\Temp\d89300e103bfd617274ee22294bcc16c.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2980 wrote to memory of 2212 N/A C:\Users\Admin\AppData\Local\Temp\d89300e103bfd617274ee22294bcc16c.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2980 wrote to memory of 2212 N/A C:\Users\Admin\AppData\Local\Temp\d89300e103bfd617274ee22294bcc16c.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2980 wrote to memory of 2212 N/A C:\Users\Admin\AppData\Local\Temp\d89300e103bfd617274ee22294bcc16c.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2980 wrote to memory of 2212 N/A C:\Users\Admin\AppData\Local\Temp\d89300e103bfd617274ee22294bcc16c.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2980 wrote to memory of 2212 N/A C:\Users\Admin\AppData\Local\Temp\d89300e103bfd617274ee22294bcc16c.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2980 wrote to memory of 2212 N/A C:\Users\Admin\AppData\Local\Temp\d89300e103bfd617274ee22294bcc16c.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2980 wrote to memory of 2212 N/A C:\Users\Admin\AppData\Local\Temp\d89300e103bfd617274ee22294bcc16c.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2980 wrote to memory of 2212 N/A C:\Users\Admin\AppData\Local\Temp\d89300e103bfd617274ee22294bcc16c.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2980 wrote to memory of 2212 N/A C:\Users\Admin\AppData\Local\Temp\d89300e103bfd617274ee22294bcc16c.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2212 wrote to memory of 1052 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe C:\Windows\SysWOW64\WerFault.exe
PID 2212 wrote to memory of 1052 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe C:\Windows\SysWOW64\WerFault.exe
PID 2212 wrote to memory of 1052 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe C:\Windows\SysWOW64\WerFault.exe
PID 2212 wrote to memory of 1052 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe C:\Windows\SysWOW64\WerFault.exe

Processes

C:\Users\Admin\AppData\Local\Temp\d89300e103bfd617274ee22294bcc16c.exe

"C:\Users\Admin\AppData\Local\Temp\d89300e103bfd617274ee22294bcc16c.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2212 -s 728

Network

Country Destination Domain Proto
US 8.8.8.8:53 bctpump.us udp
US 45.33.23.183:80 bctpump.us tcp
US 45.33.23.183:80 bctpump.us tcp
US 45.33.23.183:80 bctpump.us tcp
US 45.33.23.183:80 bctpump.us tcp
US 45.33.23.183:80 bctpump.us tcp
US 45.33.23.183:80 bctpump.us tcp
US 45.33.23.183:80 bctpump.us tcp

Files

memory/2980-0-0x0000000000EA0000-0x0000000000F64000-memory.dmp

memory/2980-1-0x0000000074A70000-0x000000007515E000-memory.dmp

memory/2980-2-0x0000000004970000-0x00000000049B0000-memory.dmp

memory/2980-3-0x00000000005A0000-0x00000000005BC000-memory.dmp

memory/2980-4-0x0000000074A70000-0x000000007515E000-memory.dmp

memory/2980-5-0x0000000004970000-0x00000000049B0000-memory.dmp

memory/2980-6-0x0000000004FB0000-0x000000000501E000-memory.dmp

memory/2980-7-0x0000000000660000-0x00000000006A0000-memory.dmp

memory/2212-8-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2212-10-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2212-12-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2212-13-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2212-15-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2212-16-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2212-18-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2212-20-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2980-21-0x0000000074A70000-0x000000007515E000-memory.dmp

memory/2212-22-0x0000000000400000-0x0000000000438000-memory.dmp

C:\ProgramData\msvcp140.dll

MD5 a7eca2913e9112121e5585480b1f7c82
SHA1 8202e28c75f97352c0545b1a05d2a902a1c5664b
SHA256 60bd258837c33a9abb899bc6d6393da70afe5bf2dfd9b560f47092a9c43ba43a
SHA512 f6ceabaa4f567fa98f6758e7605fdf473f4ae0f26b0be1c5d0ef8e456421c4a8b487ed7b6042469d81daf7142eee8cd382a8a169972ea7accf9eb079e62f9f46

memory/2212-32-0x0000000000400000-0x0000000000438000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-20 10:28

Reported

2024-03-20 10:31

Platform

win10v2004-20240226-en

Max time kernel

137s

Max time network

144s

Command Line

"C:\Users\Admin\AppData\Local\Temp\d89300e103bfd617274ee22294bcc16c.exe"

Signatures

Oski

infostealer oski

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3668 set thread context of 3076 N/A C:\Users\Admin\AppData\Local\Temp\d89300e103bfd617274ee22294bcc16c.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\d89300e103bfd617274ee22294bcc16c.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3668 wrote to memory of 3076 N/A C:\Users\Admin\AppData\Local\Temp\d89300e103bfd617274ee22294bcc16c.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 3668 wrote to memory of 3076 N/A C:\Users\Admin\AppData\Local\Temp\d89300e103bfd617274ee22294bcc16c.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 3668 wrote to memory of 3076 N/A C:\Users\Admin\AppData\Local\Temp\d89300e103bfd617274ee22294bcc16c.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 3668 wrote to memory of 3076 N/A C:\Users\Admin\AppData\Local\Temp\d89300e103bfd617274ee22294bcc16c.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 3668 wrote to memory of 3076 N/A C:\Users\Admin\AppData\Local\Temp\d89300e103bfd617274ee22294bcc16c.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 3668 wrote to memory of 3076 N/A C:\Users\Admin\AppData\Local\Temp\d89300e103bfd617274ee22294bcc16c.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 3668 wrote to memory of 3076 N/A C:\Users\Admin\AppData\Local\Temp\d89300e103bfd617274ee22294bcc16c.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 3668 wrote to memory of 3076 N/A C:\Users\Admin\AppData\Local\Temp\d89300e103bfd617274ee22294bcc16c.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 3668 wrote to memory of 3076 N/A C:\Users\Admin\AppData\Local\Temp\d89300e103bfd617274ee22294bcc16c.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe

Processes

C:\Users\Admin\AppData\Local\Temp\d89300e103bfd617274ee22294bcc16c.exe

"C:\Users\Admin\AppData\Local\Temp\d89300e103bfd617274ee22294bcc16c.exe"

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=1340 --field-trial-handle=2276,i,11674642242468042059,14711253743544118298,262144 --variations-seed-version /prefetch:8

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 3076 -ip 3076

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3076 -s 1280

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.200:443 g.bing.com tcp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 173.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 22.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 bctpump.us udp
US 45.33.18.44:80 bctpump.us tcp
US 45.33.18.44:80 bctpump.us tcp
US 45.33.18.44:80 bctpump.us tcp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 44.18.33.45.in-addr.arpa udp
US 45.33.18.44:80 bctpump.us tcp
US 45.33.18.44:80 bctpump.us tcp
US 45.33.18.44:80 bctpump.us tcp
US 45.33.18.44:80 bctpump.us tcp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp

Files

memory/3668-0-0x0000000074F00000-0x00000000756B0000-memory.dmp

memory/3668-1-0x0000000000BC0000-0x0000000000C84000-memory.dmp

memory/3668-2-0x0000000005BD0000-0x0000000006174000-memory.dmp

memory/3668-3-0x00000000056C0000-0x0000000005752000-memory.dmp

memory/3668-4-0x00000000058F0000-0x0000000005900000-memory.dmp

memory/3668-5-0x00000000056A0000-0x00000000056AA000-memory.dmp

memory/3668-6-0x0000000005B30000-0x0000000005B4C000-memory.dmp

memory/3668-7-0x0000000006B00000-0x0000000006B9C000-memory.dmp

memory/3668-8-0x0000000074F00000-0x00000000756B0000-memory.dmp

memory/3668-9-0x00000000058F0000-0x0000000005900000-memory.dmp

memory/3668-10-0x0000000001490000-0x00000000014FE000-memory.dmp

memory/3668-11-0x0000000006A60000-0x0000000006AA0000-memory.dmp

memory/3076-12-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3076-13-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3076-15-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3076-16-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3668-17-0x0000000074F00000-0x00000000756B0000-memory.dmp

C:\ProgramData\msvcp140.dll

MD5 a7eca2913e9112121e5585480b1f7c82
SHA1 8202e28c75f97352c0545b1a05d2a902a1c5664b
SHA256 60bd258837c33a9abb899bc6d6393da70afe5bf2dfd9b560f47092a9c43ba43a
SHA512 f6ceabaa4f567fa98f6758e7605fdf473f4ae0f26b0be1c5d0ef8e456421c4a8b487ed7b6042469d81daf7142eee8cd382a8a169972ea7accf9eb079e62f9f46

memory/3076-28-0x0000000000400000-0x0000000000438000-memory.dmp