Malware Analysis Report

2025-01-03 04:57

Sample ID 220411-drq6xageer
Target IMG_106_680_74_80.pdf
SHA256 9b26547086a1489e5534452021694af3a565fe76926e671112be4852947a5d27
Tags
oski infostealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

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

9b26547086a1489e5534452021694af3a565fe76926e671112be4852947a5d27

Threat Level: Known bad

The file IMG_106_680_74_80.pdf was found to be: Known bad.

Malicious Activity Summary

oski infostealer

Oski

Suspicious use of SetThreadContext

Program crash

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2022-04-11 03:14

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-04-11 03:14

Reported

2022-04-11 03:52

Platform

win7-20220331-en

Max time kernel

53s

Max time network

45s

Command Line

"C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe"

Signatures

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 800 wrote to memory of 2016 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 2016 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 2016 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 2016 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 2032 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 2032 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 2032 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 2032 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 1736 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 1736 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 1736 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 1736 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 1988 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 1988 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 1988 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 1988 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 2000 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 2000 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 2000 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 2000 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 2004 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 2004 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 2004 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 2004 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 1984 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 1984 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 1984 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 1984 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 1772 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 1772 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 1772 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 1772 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 1972 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 1972 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 1972 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 1972 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 1960 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 1960 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 1960 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 800 wrote to memory of 1960 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe

Processes

C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe

"C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe"

C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe

C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe

C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe

C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe

C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe

C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe

C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe

C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe

C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe

C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe

C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe

C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe

C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe

C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe

C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe

C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe

C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe

C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe

C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe

C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe

Network

N/A

Files

memory/800-54-0x00000000003B0000-0x0000000000412000-memory.dmp

memory/800-55-0x00000000005A0000-0x00000000005AA000-memory.dmp

memory/800-56-0x0000000001E70000-0x0000000001E94000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-04-11 03:14

Reported

2022-04-11 03:52

Platform

win10v2004-20220331-en

Max time kernel

146s

Max time network

149s

Command Line

"C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe"

Signatures

Oski

infostealer oski

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4616 set thread context of 3036 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe

"C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe"

C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe

C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3036 -ip 3036

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3036 -s 236

Network

Country Destination Domain Proto
FI 62.115.252.81:80 tcp
US 67.26.15.254:80 tcp
US 67.26.15.254:80 tcp
FI 67.27.205.126:80 tcp
NL 20.190.160.9:443 tcp
US 8.8.8.8:53 crl4.digicert.com udp
US 93.184.220.29:80 crl4.digicert.com tcp
US 20.42.65.88:443 tcp
US 67.26.11.254:80 tcp
RU 23.196.236.89:80 tcp
RU 23.196.236.89:80 tcp
US 67.26.15.254:80 tcp
US 8.8.8.8:53 151.122.125.40.in-addr.arpa udp
US 93.184.220.29:80 crl4.digicert.com tcp
US 131.253.33.203:80 tcp
US 67.26.15.254:60723 tcp
US 67.26.15.254:60701 tcp
US 67.26.15.254:63650 tcp
US 67.26.15.254:9119 tcp
US 67.26.15.254:39152 tcp
US 67.26.15.254:60378 tcp
US 67.26.15.254:20849 tcp
US 67.26.15.254:44419 tcp
US 93.184.220.29:80 crl4.digicert.com tcp
US 67.26.15.254:17468 tcp
US 67.26.15.254:54251 tcp
US 67.26.15.254:43440 tcp
US 67.26.15.254:50954 tcp
US 67.26.15.254:18892 tcp
US 67.26.15.254:63409 tcp
US 67.26.15.254:5019 tcp
US 67.26.15.254:41637 tcp
US 67.26.15.254:55117 tcp
US 67.26.15.254:32597 tcp
US 67.26.15.254:43171 tcp
US 67.26.15.254:2128 tcp
US 67.26.15.254:18042 tcp
US 67.26.15.254:3550 tcp
US 67.26.15.254:41672 tcp
US 67.26.15.254:41048 tcp
US 67.26.15.254:37917 tcp
US 67.26.15.254:15372 tcp
US 67.26.15.254:10670 tcp
US 67.26.15.254:39238 tcp
US 67.26.15.254:22262 tcp
US 67.26.15.254:44157 tcp
US 67.26.15.254:30359 tcp
US 67.26.15.254:31197 tcp
US 67.26.15.254:10411 tcp
US 67.26.15.254:47579 tcp
US 67.26.15.254:54711 tcp
US 67.26.15.254:5299 tcp
US 67.26.15.254:61775 tcp
US 67.26.15.254:57770 tcp
US 67.26.15.254:24752 tcp
US 67.26.15.254:809 tcp
US 67.26.15.254:39374 tcp
US 67.26.15.254:44277 tcp
US 93.184.220.29:80 crl4.digicert.com tcp
US 8.8.8.8:53 226.101.242.52.in-addr.arpa udp
US 8.8.8.8:53 crl4.digicert.com udp
US 93.184.220.29:80 crl4.digicert.com tcp
NL 104.110.191.133:80 tcp
US 67.26.15.254:80 tcp

Files

memory/4616-124-0x00000000001D0000-0x0000000000232000-memory.dmp

memory/4616-125-0x0000000004C10000-0x0000000004C86000-memory.dmp

memory/4616-126-0x0000000004BC0000-0x0000000004BDE000-memory.dmp

memory/3036-127-0x0000000000000000-mapping.dmp

memory/3036-128-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3036-129-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3036-130-0x0000000000400000-0x0000000000438000-memory.dmp