oski | 42745214d98c128bbc0ffcbe666bb45738aef6ef725c04c05aa77aa32b3759bf

General

Target

1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe
Size

598KB
MD5

9f8456f6d52c0afbbbb4600c383c051a
SHA1

f38291c94071200290251937b091a3ac0565c00f
SHA256

1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99
SHA512

925fcaf9fce9aa844ad16ab180dc5d476c9f3bd0025afba20d6ff6895c341696491fcd4b07ba923b221b9ba113c800fd3fb45e17eab7ac0b4229415714d72ead

Score

10^/10

oski infostealer spyware stealer

Malware Config

Extracted

Family

oski

C2

st4q2p.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

Processes:

1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation	1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.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

Suspicious use of SetThreadContext 1 IoCs

Processes:

1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe

description	pid	process	target process
PID 452 set thread context of 1156	452	1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe	1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe

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

1768 1156 WerFault.exe 1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe
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
T1053

Processes:

schtasks.exe

pid process

3228 schtasks.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe

pid process

452 1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe

description pid process

Token: SeDebugPrivilege 452 1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe

pid	pid_target	process	target process
1768	1156	WerFault.exe	1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe

pid	process
3228	schtasks.exe

pid	process
452	1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe

description	pid	process
Token: SeDebugPrivilege	452	1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe

description	pid	process	target process
PID 452 wrote to memory of 3228	452	1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe	schtasks.exe
PID 452 wrote to memory of 3228	452	1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe	schtasks.exe
PID 452 wrote to memory of 3228	452	1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe	schtasks.exe
PID 452 wrote to memory of 1156	452	1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe	1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe
PID 452 wrote to memory of 1156	452	1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe	1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe
PID 452 wrote to memory of 1156	452	1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe	1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe
PID 452 wrote to memory of 1156	452	1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe	1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe
PID 452 wrote to memory of 1156	452	1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe	1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe
PID 452 wrote to memory of 1156	452	1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe	1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe
PID 452 wrote to memory of 1156	452	1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe	1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe
PID 452 wrote to memory of 1156	452	1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe	1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe
PID 452 wrote to memory of 1156	452	1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe	1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe

C:\Users\Admin\AppData\Local\Temp\1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe
"C:\Users\Admin\AppData\Local\Temp\1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:452

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\LlAcqqDPnbTr" /XML "C:\Users\Admin\AppData\Local\Temp\tmpE92C.tmp"
2⤵
- Creates scheduled task(s)
PID:3228

C:\Users\Admin\AppData\Local\Temp\1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99.exe
"{path}"
2⤵
PID:1156

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1156 -s 1308
3⤵
- Program crash
PID:1768

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 1156 -ip 1156
1⤵
PID:2824

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpE92C.tmp
Filesize
1KB

MD5
a6bdf436eeee852713e89e7b9ac2eb20

SHA1
9d618274df067ea0ca20702e70cf28dbadc41808

SHA256
52823eb5d8367c87df571e64ed57ec9bf37ef598031b73b5a55915214a5300ba

SHA512
f30cbff50694851a4900b2ddbf86c1ff0447e09fd62e5e189c8a8b9123e8e436aa0de7db979ce937ea182f52775686b64f31aa438f8be34ed7ba78396d93a605

Download Submit
memory/452-133-0x0000000005110000-0x00000000051AC000-memory.dmp

Filesize
624KB

Download
memory/452-132-0x0000000005070000-0x0000000005102000-memory.dmp

Filesize
584KB

Download
memory/452-130-0x00000000005D0000-0x000000000066C000-memory.dmp

Filesize
624KB

Download
memory/452-134-0x0000000005020000-0x000000000502A000-memory.dmp

Filesize
40KB

Download
memory/452-131-0x0000000005580000-0x0000000005B24000-memory.dmp

Filesize
5.6MB

Download
memory/1156-138-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1156-139-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1156-137-0x0000000000000000-mapping.dmp

Download
memory/1156-140-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1156-141-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1156-142-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/3228-135-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads