Malware Analysis Report

2024-09-22 21:53

Sample ID 240305-wr81tsec38
Target b556492c8d162c4180c0c6a5c07e6abb
SHA256 10410848d808e42758883ff2045ac5b10d16ad3d4155771483f0aba1f245a6e4
Tags
oski infostealer spyware stealer
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

10410848d808e42758883ff2045ac5b10d16ad3d4155771483f0aba1f245a6e4

Threat Level: Known bad

The file b556492c8d162c4180c0c6a5c07e6abb was found to be: Known bad.

Malicious Activity Summary

oski infostealer spyware stealer

Oski

Reads user/profile data of web browsers

Suspicious use of SetThreadContext

Program crash

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-03-05 18:10

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-05 18:10

Reported

2024-03-05 18:13

Platform

win7-20240221-en

Max time kernel

121s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe"

Signatures

Oski

infostealer oski

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2100 set thread context of 2416 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2100 wrote to memory of 2536 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe
PID 2100 wrote to memory of 2536 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe
PID 2100 wrote to memory of 2536 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe
PID 2100 wrote to memory of 2536 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe
PID 2100 wrote to memory of 2416 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe
PID 2100 wrote to memory of 2416 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe
PID 2100 wrote to memory of 2416 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe
PID 2100 wrote to memory of 2416 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe
PID 2100 wrote to memory of 2416 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe
PID 2100 wrote to memory of 2416 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe
PID 2100 wrote to memory of 2416 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe
PID 2100 wrote to memory of 2416 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe
PID 2100 wrote to memory of 2416 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe
PID 2100 wrote to memory of 2416 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe
PID 2416 wrote to memory of 2512 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Windows\SysWOW64\WerFault.exe
PID 2416 wrote to memory of 2512 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Windows\SysWOW64\WerFault.exe
PID 2416 wrote to memory of 2512 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Windows\SysWOW64\WerFault.exe
PID 2416 wrote to memory of 2512 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Windows\SysWOW64\WerFault.exe

Processes

C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe

"C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe"

C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe

"{path}"

C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe

"{path}"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2416 -s 112

Network

N/A

Files

memory/2100-0-0x0000000001360000-0x0000000001410000-memory.dmp

memory/2100-1-0x00000000745F0000-0x0000000074CDE000-memory.dmp

memory/2100-2-0x0000000000E30000-0x0000000000E70000-memory.dmp

memory/2100-3-0x0000000000550000-0x0000000000558000-memory.dmp

memory/2100-4-0x00000000745F0000-0x0000000074CDE000-memory.dmp

memory/2100-5-0x0000000000E30000-0x0000000000E70000-memory.dmp

memory/2100-6-0x0000000005D90000-0x0000000005E12000-memory.dmp

memory/2100-7-0x0000000000D90000-0x0000000000DCA000-memory.dmp

memory/2416-8-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2416-11-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2416-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2416-16-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2416-12-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2416-10-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2416-9-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2416-18-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2100-19-0x00000000745F0000-0x0000000074CDE000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-05 18:10

Reported

2024-03-05 18:13

Platform

win10v2004-20240226-en

Max time kernel

151s

Max time network

156s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe"

Signatures

Oski

infostealer oski

Reads user/profile data of web browsers

spyware stealer

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4140 set thread context of 2440 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4140 wrote to memory of 3128 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe
PID 4140 wrote to memory of 3128 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe
PID 4140 wrote to memory of 3128 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe
PID 4140 wrote to memory of 4804 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe
PID 4140 wrote to memory of 4804 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe
PID 4140 wrote to memory of 4804 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe
PID 4140 wrote to memory of 2440 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe
PID 4140 wrote to memory of 2440 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe
PID 4140 wrote to memory of 2440 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe
PID 4140 wrote to memory of 2440 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe
PID 4140 wrote to memory of 2440 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe
PID 4140 wrote to memory of 2440 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe
PID 4140 wrote to memory of 2440 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe
PID 4140 wrote to memory of 2440 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe
PID 4140 wrote to memory of 2440 N/A C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe

Processes

C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe

"C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe"

C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe

"{path}"

C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe

"{path}"

C:\Users\Admin\AppData\Local\Temp\b556492c8d162c4180c0c6a5c07e6abb.exe

"{path}"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 2440 -ip 2440

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2440 -s 1284

Network

Country Destination Domain Proto
NL 52.142.223.178:80 tcp
US 8.8.8.8:53 2.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 187.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 100.5.17.2.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 119.110.54.20.in-addr.arpa udp
US 8.8.8.8:53 81.171.91.138.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 195.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 83.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 zzz.divendesign.in udp
US 8.8.8.8:53 26.35.223.20.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
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 196.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 211.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 21.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 209.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 189.191.110.104.in-addr.arpa udp
US 8.8.8.8:53 182.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 234.17.178.52.in-addr.arpa udp
GB 96.17.178.182:80 tcp

Files

memory/4140-0-0x0000000000550000-0x0000000000600000-memory.dmp

memory/4140-1-0x0000000074750000-0x0000000074F00000-memory.dmp

memory/4140-2-0x00000000055E0000-0x0000000005B84000-memory.dmp

memory/4140-3-0x0000000005030000-0x00000000050C2000-memory.dmp

memory/4140-4-0x00000000052A0000-0x00000000052B0000-memory.dmp

memory/4140-5-0x0000000004FF0000-0x0000000004FFA000-memory.dmp

memory/4140-6-0x00000000064D0000-0x00000000064D8000-memory.dmp

memory/4140-7-0x0000000008EF0000-0x0000000008F8C000-memory.dmp

memory/4140-8-0x0000000074750000-0x0000000074F00000-memory.dmp

memory/4140-9-0x00000000052A0000-0x00000000052B0000-memory.dmp

memory/4140-10-0x00000000067C0000-0x0000000006842000-memory.dmp

memory/4140-11-0x00000000066B0000-0x00000000066EA000-memory.dmp

memory/2440-12-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2440-13-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2440-15-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4140-17-0x0000000074750000-0x0000000074F00000-memory.dmp

memory/2440-16-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2440-20-0x0000000000400000-0x0000000000438000-memory.dmp