oski | 65b3950a62245fbbf12576b000623feccf941ec225bceba333ebca578f5fe6d0

Analysis

max time kernel
77s
max time network
124s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
29-09-2022 10:32

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General

Target

65b3950a62245fbbf12576b000623feccf941ec225bceba333ebca578f5fe6d0.exe
Size

7.3MB
MD5

0d7a584f85880b0c8541833714af9745
SHA1

def0269ccfa9518b4827e4d1bbf37c2a452f23ce
SHA256

65b3950a62245fbbf12576b000623feccf941ec225bceba333ebca578f5fe6d0
SHA512

649b17a838be68a244bc8ccca43fbbc259ce84472016c51c4a63f022acea0cb2cdcb05ef1db1dbe61b9c6e7091e04fe1315923cc36b92ea23d6d533c6f2a5d13
SSDEEP

196608:yshVZPqIbleCIWtzM1lKmTC+3NRHgz1fL2wbp/Th:yspZpIvlKMxgxzfF

Score

10^/10

oski infostealer spyware stealer

Malware Config

Extracted

Family

oski

shivabhaiji.in

Signatures

Oski
Oski is an infostealer targeting browser data, crypto wallets.
infostealer oski
Executes dropped EXE 1 IoCs

Processes:

crack.exe

pid process

3520 crack.exe

pid	process
3520	crack.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

65b3950a62245fbbf12576b000623feccf941ec225bceba333ebca578f5fe6d0.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	65b3950a62245fbbf12576b000623feccf941ec225bceba333ebca578f5fe6d0.exe

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
T1081
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

4860 3520 WerFault.exe crack.exe

pid	pid_target	process	target process
4860	3520	WerFault.exe	crack.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

65b3950a62245fbbf12576b000623feccf941ec225bceba333ebca578f5fe6d0.exe

pid	process
1584	65b3950a62245fbbf12576b000623feccf941ec225bceba333ebca578f5fe6d0.exe
1584	65b3950a62245fbbf12576b000623feccf941ec225bceba333ebca578f5fe6d0.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

65b3950a62245fbbf12576b000623feccf941ec225bceba333ebca578f5fe6d0.exe

description	pid	process	target process
PID 1584 wrote to memory of 3520	1584	65b3950a62245fbbf12576b000623feccf941ec225bceba333ebca578f5fe6d0.exe	crack.exe
PID 1584 wrote to memory of 3520	1584	65b3950a62245fbbf12576b000623feccf941ec225bceba333ebca578f5fe6d0.exe	crack.exe
PID 1584 wrote to memory of 3520	1584	65b3950a62245fbbf12576b000623feccf941ec225bceba333ebca578f5fe6d0.exe	crack.exe

C:\Users\Admin\AppData\Local\Temp\65b3950a62245fbbf12576b000623feccf941ec225bceba333ebca578f5fe6d0.exe
"C:\Users\Admin\AppData\Local\Temp\65b3950a62245fbbf12576b000623feccf941ec225bceba333ebca578f5fe6d0.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1584

C:\Users\Admin\AppData\Local\Temp\VIP72\crack.exe
"C:\Users\Admin\AppData\Local\Temp\VIP72\crack.exe"
2⤵
- Executes dropped EXE
PID:3520

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3520 -s 1748
3⤵
- Program crash
PID:4860

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 3520 -ip 3520
1⤵
PID:2500

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\VIP72\crack.exe
Filesize
200KB

MD5
f5c3c74c09dc9797228bb5ac5020b6b9

SHA1
269d6eacfcd62024c3937f785e0f6ec62a91b46e

SHA256
9d1ef296437c72f86d3ca4faec512b5686cbee7bfe0493b3c4a378d61a7ae686

SHA512
3a804ff2b983266de1f8412f8a448fd655bf3c1914a2cbb46e3afcb8f7b0ab4657b397c5a074bcc9abc80e9759664b5b0abb0e8df9527906ca3bb8020ad5e868

Download Submit
C:\Users\Admin\AppData\Local\Temp\VIP72\crack.exe
Filesize
200KB

MD5
f5c3c74c09dc9797228bb5ac5020b6b9

SHA1
269d6eacfcd62024c3937f785e0f6ec62a91b46e

SHA256
9d1ef296437c72f86d3ca4faec512b5686cbee7bfe0493b3c4a378d61a7ae686

SHA512
3a804ff2b983266de1f8412f8a448fd655bf3c1914a2cbb46e3afcb8f7b0ab4657b397c5a074bcc9abc80e9759664b5b0abb0e8df9527906ca3bb8020ad5e868

Download Submit
memory/3520-132-0x0000000000000000-mapping.dmp

Download