oski | 0d680dba51deffe04686d1df8c87de9c6c0310f7060bf4cfb0079a2f25caef10

General

Target

379ab7eebd100778e2605df3c32da046.exe
Size

595KB
MD5

379ab7eebd100778e2605df3c32da046
SHA1

cba7f97fb75338262c97549608a653c155150813
SHA256

0d680dba51deffe04686d1df8c87de9c6c0310f7060bf4cfb0079a2f25caef10
SHA512

f95a923b84b7594a464bcf981e01af94d4e4d1d3bc98e52c022aac12c9393106fe1fda97a66b15cfdae867e2272585a1a99e6e7237f823fde6c0183c6676a7a3

Score

10^/10

oski infostealer persistence

Malware Config

Extracted

Family

oski

C2

quisha.axwebsite.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-1-5-21-1101907861-274115917-2188613224-1000\Control Panel\International\Geo\Nation	379ab7eebd100778e2605df3c32da046.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1101907861-274115917-2188613224-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Hacsuj = "\"C:\\Users\\Admin\\AppData\\Roaming\\Xjirlvjna\\Hacsuj.exe\""	379ab7eebd100778e2605df3c32da046.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1264 set thread context of 4856	1264	379ab7eebd100778e2605df3c32da046.exe	85

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

pid	pid_target	Process	procid_target
4772	4856	WerFault.exe	85

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
4328	powershell.exe
4328	powershell.exe
1264	379ab7eebd100778e2605df3c32da046.exe
1264	379ab7eebd100778e2605df3c32da046.exe
1264	379ab7eebd100778e2605df3c32da046.exe
1264	379ab7eebd100778e2605df3c32da046.exe
1264	379ab7eebd100778e2605df3c32da046.exe
1264	379ab7eebd100778e2605df3c32da046.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4328	powershell.exe
Token: SeDebugPrivilege	1264	379ab7eebd100778e2605df3c32da046.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1264 wrote to memory of 4328	1264	379ab7eebd100778e2605df3c32da046.exe	82
PID 1264 wrote to memory of 4328	1264	379ab7eebd100778e2605df3c32da046.exe	82
PID 1264 wrote to memory of 4328	1264	379ab7eebd100778e2605df3c32da046.exe	82
PID 1264 wrote to memory of 4920	1264	379ab7eebd100778e2605df3c32da046.exe	84
PID 1264 wrote to memory of 4920	1264	379ab7eebd100778e2605df3c32da046.exe	84
PID 1264 wrote to memory of 4920	1264	379ab7eebd100778e2605df3c32da046.exe	84
PID 1264 wrote to memory of 4856	1264	379ab7eebd100778e2605df3c32da046.exe	85
PID 1264 wrote to memory of 4856	1264	379ab7eebd100778e2605df3c32da046.exe	85
PID 1264 wrote to memory of 4856	1264	379ab7eebd100778e2605df3c32da046.exe	85
PID 1264 wrote to memory of 4856	1264	379ab7eebd100778e2605df3c32da046.exe	85
PID 1264 wrote to memory of 4856	1264	379ab7eebd100778e2605df3c32da046.exe	85
PID 1264 wrote to memory of 4856	1264	379ab7eebd100778e2605df3c32da046.exe	85
PID 1264 wrote to memory of 4856	1264	379ab7eebd100778e2605df3c32da046.exe	85
PID 1264 wrote to memory of 4856	1264	379ab7eebd100778e2605df3c32da046.exe	85
PID 1264 wrote to memory of 4856	1264	379ab7eebd100778e2605df3c32da046.exe	85

C:\Users\Admin\AppData\Local\Temp\379ab7eebd100778e2605df3c32da046.exe
"C:\Users\Admin\AppData\Local\Temp\379ab7eebd100778e2605df3c32da046.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1264
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAAMQAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4328
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  2⤵
  PID:4920
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  2⤵
  PID:4856
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4856 -s 1288
    3⤵
    - Program crash
    PID:4772

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4856 -ip 4856
1⤵
PID:4816

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

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

memory/1264-130-0x0000000000460000-0x00000000004FA000-memory.dmp

Filesize
616KB

Download
memory/1264-131-0x0000000004EF0000-0x0000000004F12000-memory.dmp

Filesize
136KB

Download
memory/4328-138-0x0000000007560000-0x0000000007BDA000-memory.dmp

Filesize
6.5MB

Download
memory/4328-139-0x00000000063F0000-0x000000000640A000-memory.dmp

Filesize
104KB

Download
memory/4328-134-0x00000000053B0000-0x00000000059D8000-memory.dmp

Filesize
6.2MB

Download
memory/4328-135-0x00000000050D0000-0x0000000005136000-memory.dmp

Filesize
408KB

Download
memory/4328-136-0x00000000051F0000-0x0000000005256000-memory.dmp

Filesize
408KB

Download
memory/4328-137-0x0000000005EF0000-0x0000000005F0E000-memory.dmp

Filesize
120KB

Download
memory/4328-133-0x0000000002900000-0x0000000002936000-memory.dmp

Filesize
216KB

Download
memory/4856-142-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4856-143-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4856-144-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4856-145-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4856-146-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download

Analysis

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