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

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-1-5-21-275798769-4264537674-1142822080-1000\Control Panel\International\Geo\Nation	ad4b527e8240812756aa003af27b9e48.exe

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4984 set thread context of 1696	4984	ad4b527e8240812756aa003af27b9e48.exe	97

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
3844	1696	WerFault.exe	97

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
3116	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
4984	ad4b527e8240812756aa003af27b9e48.exe
4984	ad4b527e8240812756aa003af27b9e48.exe
4984	ad4b527e8240812756aa003af27b9e48.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4984	ad4b527e8240812756aa003af27b9e48.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4984 wrote to memory of 3116	4984	ad4b527e8240812756aa003af27b9e48.exe	94
PID 4984 wrote to memory of 3116	4984	ad4b527e8240812756aa003af27b9e48.exe	94
PID 4984 wrote to memory of 3116	4984	ad4b527e8240812756aa003af27b9e48.exe	94
PID 4984 wrote to memory of 4544	4984	ad4b527e8240812756aa003af27b9e48.exe	96
PID 4984 wrote to memory of 4544	4984	ad4b527e8240812756aa003af27b9e48.exe	96
PID 4984 wrote to memory of 4544	4984	ad4b527e8240812756aa003af27b9e48.exe	96
PID 4984 wrote to memory of 1696	4984	ad4b527e8240812756aa003af27b9e48.exe	97
PID 4984 wrote to memory of 1696	4984	ad4b527e8240812756aa003af27b9e48.exe	97
PID 4984 wrote to memory of 1696	4984	ad4b527e8240812756aa003af27b9e48.exe	97
PID 4984 wrote to memory of 1696	4984	ad4b527e8240812756aa003af27b9e48.exe	97
PID 4984 wrote to memory of 1696	4984	ad4b527e8240812756aa003af27b9e48.exe	97
PID 4984 wrote to memory of 1696	4984	ad4b527e8240812756aa003af27b9e48.exe	97
PID 4984 wrote to memory of 1696	4984	ad4b527e8240812756aa003af27b9e48.exe	97
PID 4984 wrote to memory of 1696	4984	ad4b527e8240812756aa003af27b9e48.exe	97
PID 4984 wrote to memory of 1696	4984	ad4b527e8240812756aa003af27b9e48.exe	97

C:\Users\Admin\AppData\Local\Temp\ad4b527e8240812756aa003af27b9e48.exe
"C:\Users\Admin\AppData\Local\Temp\ad4b527e8240812756aa003af27b9e48.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4984
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\paGCyK" /XML "C:\Users\Admin\AppData\Local\Temp\tmpD7C2.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:3116
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
  2⤵
  PID:4544
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
  2⤵
  PID:1696
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1696 -s 1288
    3⤵
    - Program crash
    PID:3844

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 1696 -ip 1696
1⤵
PID:1932

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

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpD7C2.tmp

Filesize
1KB

MD5
e95b03b7446e070e4d5075f6d03bbf1a

SHA1
6470bc6334cf5095ca874732130e5a34c445e423

SHA256
eccae6cfcfd4c2f86320608df7d98458c0c7d83632368c7c1496ae6ba60a4e90

SHA512
04d481f37ecb00c5fb823a1ff92a19da95083cefca79105f9b9c9a4d6fac8b14649a453b06830395df9b7c3b6be6315468399874e541d592bc046826b5c0fc81

Download Submit
memory/1696-26-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1696-23-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1696-21-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1696-19-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1696-18-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4984-5-0x0000000005AC0000-0x0000000005AD0000-memory.dmp

Filesize
64KB

Download
memory/4984-6-0x00000000057A0000-0x00000000057AA000-memory.dmp

Filesize
40KB

Download
memory/4984-8-0x0000000005A20000-0x0000000005A38000-memory.dmp

Filesize
96KB

Download
memory/4984-9-0x0000000074960000-0x0000000075110000-memory.dmp

Filesize
7.7MB

Download
memory/4984-10-0x0000000005AC0000-0x0000000005AD0000-memory.dmp

Filesize
64KB

Download
memory/4984-11-0x0000000009370000-0x0000000009418000-memory.dmp

Filesize
672KB

Download
memory/4984-12-0x000000000BB70000-0x000000000BBB0000-memory.dmp

Filesize
256KB

Download
memory/4984-7-0x0000000005A40000-0x0000000005A96000-memory.dmp

Filesize
344KB

Download
memory/4984-0-0x0000000000CC0000-0x0000000000DA8000-memory.dmp

Filesize
928KB

Download
memory/4984-4-0x0000000005850000-0x00000000058E2000-memory.dmp

Filesize
584KB

Download
memory/4984-3-0x0000000005E00000-0x00000000063A4000-memory.dmp

Filesize
5.6MB

Download
memory/4984-22-0x0000000074960000-0x0000000075110000-memory.dmp

Filesize
7.7MB

Download
memory/4984-2-0x00000000057B0000-0x000000000584C000-memory.dmp

Filesize
624KB

Download
memory/4984-1-0x0000000074960000-0x0000000075110000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads