oski | 2e970f330612770b2d3b786690aa6dd847a0d4773cc726fdc5df1dd9338d6e07

Analysis

max time kernel
143s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
21-04-2024 16:08

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General

Target

ffaa9755239587c3b4678da8afa6dd9c_JaffaCakes118.exe
Size

894KB
MD5

ffaa9755239587c3b4678da8afa6dd9c
SHA1

71a981250a9bac4dbb517196c86adca52a22244b
SHA256

2e970f330612770b2d3b786690aa6dd847a0d4773cc726fdc5df1dd9338d6e07
SHA512

c9651d254e4083afbfae36c3ffa4c4886607a82070fe2ff9548c2528c53c06c6552003c1d5a1ef8f97332ae139392e42ad25e94e6da37564c6b8aece558aafd6
SSDEEP

12288:phvirSme9I5UJaeutyLgiPxl6MkneDogS7qn+QHnFsVjs7YtiwS0:/Me93attKgiDt3S7ULHnhcpS

Score

10^/10

oski infostealer spyware stealer

Malware Config

Extracted

Family

oski

samsungprod.xyz

Signatures

Oski
Oski is an infostealer targeting browser data, crypto wallets.
infostealer oski

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	ffaa9755239587c3b4678da8afa6dd9c_JaffaCakes118.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
T1552.001

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4076 set thread context of 1100	4076	ffaa9755239587c3b4678da8afa6dd9c_JaffaCakes118.exe	103

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4592	1100	WerFault.exe	103

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
4788	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4076	ffaa9755239587c3b4678da8afa6dd9c_JaffaCakes118.exe
4076	ffaa9755239587c3b4678da8afa6dd9c_JaffaCakes118.exe
4076	ffaa9755239587c3b4678da8afa6dd9c_JaffaCakes118.exe
5052	powershell.exe
5052	powershell.exe
5052	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4076	ffaa9755239587c3b4678da8afa6dd9c_JaffaCakes118.exe
Token: SeDebugPrivilege	5052	powershell.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4076 wrote to memory of 5052	4076	ffaa9755239587c3b4678da8afa6dd9c_JaffaCakes118.exe	100
PID 4076 wrote to memory of 5052	4076	ffaa9755239587c3b4678da8afa6dd9c_JaffaCakes118.exe	100
PID 4076 wrote to memory of 5052	4076	ffaa9755239587c3b4678da8afa6dd9c_JaffaCakes118.exe	100
PID 4076 wrote to memory of 4788	4076	ffaa9755239587c3b4678da8afa6dd9c_JaffaCakes118.exe	102
PID 4076 wrote to memory of 4788	4076	ffaa9755239587c3b4678da8afa6dd9c_JaffaCakes118.exe	102
PID 4076 wrote to memory of 4788	4076	ffaa9755239587c3b4678da8afa6dd9c_JaffaCakes118.exe	102
PID 4076 wrote to memory of 1100	4076	ffaa9755239587c3b4678da8afa6dd9c_JaffaCakes118.exe	103
PID 4076 wrote to memory of 1100	4076	ffaa9755239587c3b4678da8afa6dd9c_JaffaCakes118.exe	103
PID 4076 wrote to memory of 1100	4076	ffaa9755239587c3b4678da8afa6dd9c_JaffaCakes118.exe	103
PID 4076 wrote to memory of 1100	4076	ffaa9755239587c3b4678da8afa6dd9c_JaffaCakes118.exe	103
PID 4076 wrote to memory of 1100	4076	ffaa9755239587c3b4678da8afa6dd9c_JaffaCakes118.exe	103
PID 4076 wrote to memory of 1100	4076	ffaa9755239587c3b4678da8afa6dd9c_JaffaCakes118.exe	103
PID 4076 wrote to memory of 1100	4076	ffaa9755239587c3b4678da8afa6dd9c_JaffaCakes118.exe	103
PID 4076 wrote to memory of 1100	4076	ffaa9755239587c3b4678da8afa6dd9c_JaffaCakes118.exe	103
PID 4076 wrote to memory of 1100	4076	ffaa9755239587c3b4678da8afa6dd9c_JaffaCakes118.exe	103

C:\Users\Admin\AppData\Local\Temp\ffaa9755239587c3b4678da8afa6dd9c_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\ffaa9755239587c3b4678da8afa6dd9c_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4076
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\ffaa9755239587c3b4678da8afa6dd9c_JaffaCakes118.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5052
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\EHtyJcWGIdThwk" /XML "C:\Users\Admin\AppData\Local\Temp\tmpE52B.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:4788
- C:\Users\Admin\AppData\Local\Temp\ffaa9755239587c3b4678da8afa6dd9c_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\ffaa9755239587c3b4678da8afa6dd9c_JaffaCakes118.exe"
  2⤵
  PID:1100
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1100 -s 1288
    3⤵
    - Program crash
    PID:4592

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=4472 --field-trial-handle=2656,i,16940681401824032220,151921362336696246,262144 --variations-seed-version /prefetch:8
1⤵
PID:4792

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1100 -ip 1100
1⤵
PID:2556

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_kqv1zaom.tfr.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1100-57-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1100-21-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1100-20-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1100-19-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1100-23-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4076-4-0x00000000030C0000-0x00000000030D0000-memory.dmp

Filesize
64KB

Download
memory/4076-7-0x0000000074D90000-0x0000000075540000-memory.dmp

Filesize
7.7MB

Download
memory/4076-8-0x00000000030C0000-0x00000000030D0000-memory.dmp

Filesize
64KB

Download
memory/4076-9-0x0000000007FF0000-0x000000000808C000-memory.dmp

Filesize
624KB

Download
memory/4076-10-0x00000000081B0000-0x000000000822E000-memory.dmp

Filesize
504KB

Download
memory/4076-6-0x00000000057F0000-0x0000000005808000-memory.dmp

Filesize
96KB

Download
memory/4076-5-0x0000000003090000-0x000000000309A000-memory.dmp

Filesize
40KB

Download
memory/4076-3-0x0000000005470000-0x0000000005502000-memory.dmp

Filesize
584KB

Download
memory/4076-0-0x0000000074D90000-0x0000000075540000-memory.dmp

Filesize
7.7MB

Download
memory/4076-2-0x0000000005BB0000-0x0000000006154000-memory.dmp

Filesize
5.6MB

Download
memory/4076-1-0x0000000000940000-0x0000000000A26000-memory.dmp

Filesize
920KB

Download
memory/4076-24-0x0000000074D90000-0x0000000075540000-memory.dmp

Filesize
7.7MB

Download
memory/5052-33-0x00000000063C0000-0x0000000006426000-memory.dmp

Filesize
408KB

Download
memory/5052-56-0x0000000006F50000-0x0000000006F6E000-memory.dmp

Filesize
120KB

Download
memory/5052-26-0x0000000005B00000-0x0000000005B22000-memory.dmp

Filesize
136KB

Download
memory/5052-27-0x00000000062E0000-0x0000000006346000-memory.dmp

Filesize
408KB

Download
memory/5052-17-0x00000000030B0000-0x00000000030E6000-memory.dmp

Filesize
216KB

Download
memory/5052-18-0x0000000003110000-0x0000000003120000-memory.dmp

Filesize
64KB

Download
memory/5052-38-0x0000000006530000-0x0000000006884000-memory.dmp

Filesize
3.3MB

Download
memory/5052-41-0x00000000069F0000-0x0000000006A0E000-memory.dmp

Filesize
120KB

Download
memory/5052-42-0x0000000007010000-0x000000000705C000-memory.dmp

Filesize
304KB

Download
memory/5052-43-0x0000000003110000-0x0000000003120000-memory.dmp

Filesize
64KB

Download
memory/5052-44-0x000000007FDF0000-0x000000007FE00000-memory.dmp

Filesize
64KB

Download
memory/5052-45-0x00000000079F0000-0x0000000007A22000-memory.dmp

Filesize
200KB

Download
memory/5052-46-0x0000000071CB0000-0x0000000071CFC000-memory.dmp

Filesize
304KB

Download
memory/5052-25-0x0000000005BB0000-0x00000000061D8000-memory.dmp

Filesize
6.2MB

Download
memory/5052-15-0x0000000074D90000-0x0000000075540000-memory.dmp

Filesize
7.7MB

Download
memory/5052-58-0x0000000007C30000-0x0000000007CD3000-memory.dmp

Filesize
652KB

Download
memory/5052-59-0x0000000008360000-0x00000000089DA000-memory.dmp

Filesize
6.5MB

Download
memory/5052-60-0x0000000007D20000-0x0000000007D3A000-memory.dmp

Filesize
104KB

Download
memory/5052-61-0x0000000007D90000-0x0000000007D9A000-memory.dmp

Filesize
40KB

Download
memory/5052-62-0x0000000007F90000-0x0000000008026000-memory.dmp

Filesize
600KB

Download
memory/5052-63-0x0000000007F30000-0x0000000007F41000-memory.dmp

Filesize
68KB

Download
memory/5052-64-0x0000000007F50000-0x0000000007F5E000-memory.dmp

Filesize
56KB

Download
memory/5052-65-0x0000000074D90000-0x0000000075540000-memory.dmp

Filesize
7.7MB

Download
memory/5052-66-0x0000000007F60000-0x0000000007F74000-memory.dmp

Filesize
80KB

Download
memory/5052-67-0x0000000008060000-0x000000000807A000-memory.dmp

Filesize
104KB

Download
memory/5052-68-0x0000000008040000-0x0000000008048000-memory.dmp

Filesize
32KB

Download
memory/5052-71-0x0000000074D90000-0x0000000075540000-memory.dmp

Filesize
7.7MB

Download