oski | fa0ab33b2858424a74e0b8adaa205f38ebfd769701e4d05a84737d09e2cc358f

General

Target

ad4b527e8240812756aa003af27b9e48.exe
Size

909KB
MD5

ad4b527e8240812756aa003af27b9e48
SHA1

9c38bdefdb65b117987989eba0a2c2da19fee812
SHA256

fa0ab33b2858424a74e0b8adaa205f38ebfd769701e4d05a84737d09e2cc358f
SHA512

4d3086a06017744f779046630e02e58e1cbb5056764453bdc1af786048750b84407f1a6089f50e5b2652754f681758dd08eaa16fcc615fc1c033045c3d66dfa6
SSDEEP

12288:cvcsGI/clfB4MP7EmzCSrRUNx3cE8Fbg4AjGKyo/N9hHpZhNU65h2EObbU:cEZ4vmzrRU72bg4AttXPZQ+

Score

10^/10

oski infostealer

Malware Config

Extracted

Family

oski

C2

fredarlessonmark.com

Signatures

Oski
Oski is an infostealer targeting browser data, crypto wallets.
infostealer oski
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2112 set thread context of 2624	2112	ad4b527e8240812756aa003af27b9e48.exe	30

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
2716	2624	WerFault.exe	30

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
2724	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2112	ad4b527e8240812756aa003af27b9e48.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2112	ad4b527e8240812756aa003af27b9e48.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2112 wrote to memory of 2724	2112	ad4b527e8240812756aa003af27b9e48.exe	28
PID 2112 wrote to memory of 2724	2112	ad4b527e8240812756aa003af27b9e48.exe	28
PID 2112 wrote to memory of 2724	2112	ad4b527e8240812756aa003af27b9e48.exe	28
PID 2112 wrote to memory of 2724	2112	ad4b527e8240812756aa003af27b9e48.exe	28
PID 2112 wrote to memory of 2624	2112	ad4b527e8240812756aa003af27b9e48.exe	30
PID 2112 wrote to memory of 2624	2112	ad4b527e8240812756aa003af27b9e48.exe	30
PID 2112 wrote to memory of 2624	2112	ad4b527e8240812756aa003af27b9e48.exe	30
PID 2112 wrote to memory of 2624	2112	ad4b527e8240812756aa003af27b9e48.exe	30
PID 2112 wrote to memory of 2624	2112	ad4b527e8240812756aa003af27b9e48.exe	30
PID 2112 wrote to memory of 2624	2112	ad4b527e8240812756aa003af27b9e48.exe	30
PID 2112 wrote to memory of 2624	2112	ad4b527e8240812756aa003af27b9e48.exe	30
PID 2112 wrote to memory of 2624	2112	ad4b527e8240812756aa003af27b9e48.exe	30
PID 2112 wrote to memory of 2624	2112	ad4b527e8240812756aa003af27b9e48.exe	30
PID 2112 wrote to memory of 2624	2112	ad4b527e8240812756aa003af27b9e48.exe	30
PID 2624 wrote to memory of 2716	2624	vbc.exe	32
PID 2624 wrote to memory of 2716	2624	vbc.exe	32
PID 2624 wrote to memory of 2716	2624	vbc.exe	32
PID 2624 wrote to memory of 2716	2624	vbc.exe	32

C:\Users\Admin\AppData\Local\Temp\ad4b527e8240812756aa003af27b9e48.exe
"C:\Users\Admin\AppData\Local\Temp\ad4b527e8240812756aa003af27b9e48.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2112
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\paGCyK" /XML "C:\Users\Admin\AppData\Local\Temp\tmpC3DB.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:2724
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2624
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2624 -s 816
    3⤵
    - Program crash
    PID:2716

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Scripting

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Scripting

1

T1064

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpC3DB.tmp

Filesize
1KB

MD5
b78dab0d9d37d28b47fa2023c052679a

SHA1
02852f0234c6f5dce0815ede6a7a3eec40e7e426

SHA256
9c4794a608b67fc89d794a3a95ffb977d771b5ff6bb6e1b5cc5ee95cbe6d76ff

SHA512
685712048704527539f9899318acfcce2b3e8bf59528161e4a23a6de945563285353766b767e4d3280a59ea06ff99fbbf80fab5989bac122325879ee6b27dabf

Download Submit
memory/2112-1-0x0000000074840000-0x0000000074F2E000-memory.dmp

Filesize
6.9MB

Download
memory/2112-0-0x0000000001100000-0x00000000011E8000-memory.dmp

Filesize
928KB

Download
memory/2112-2-0x0000000000EF0000-0x0000000000F30000-memory.dmp

Filesize
256KB

Download
memory/2112-3-0x00000000008B0000-0x00000000008C8000-memory.dmp

Filesize
96KB

Download
memory/2112-4-0x0000000074840000-0x0000000074F2E000-memory.dmp

Filesize
6.9MB

Download
memory/2112-5-0x0000000000EF0000-0x0000000000F30000-memory.dmp

Filesize
256KB

Download
memory/2112-6-0x0000000005660000-0x0000000005708000-memory.dmp

Filesize
672KB

Download
memory/2112-7-0x0000000000BA0000-0x0000000000BE0000-memory.dmp

Filesize
256KB

Download
memory/2112-28-0x0000000074840000-0x0000000074F2E000-memory.dmp

Filesize
6.9MB

Download
memory/2624-15-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2624-17-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2624-19-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2624-21-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2624-23-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/2624-24-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2624-26-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2624-13-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2624-27-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2624-30-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads