oski | 938f4e648e57b9ad6d41ea3fe8707c0f249ba2baa24a5af557b4f09d698b8145

General

Target

938f4e648e57b9ad6d41ea3fe8707c0f249ba2baa24a5.exe
Size

470KB
MD5

b0d0a4af8f13d80eafe1238bd3f684c8
SHA1

23f10ff96e9933590fb9c384c543d20ab695733f
SHA256

938f4e648e57b9ad6d41ea3fe8707c0f249ba2baa24a5af557b4f09d698b8145
SHA512

5c5297e21c1a37d72894cd232a0833c917d886fb2f8aae9015a41b986a8c4738d90372181cfad5d1bb2584e9b4fbfa2a719752f2973629e42cd562487cdbeffd

Score

10^/10

oski infostealer persistence

Malware Config

Extracted

Family

oski

C2

manguerassorna.com

Signatures

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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

938f4e648e57b9ad6d41ea3fe8707c0f249ba2baa24a5.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Windows\CurrentVersion\Run\wınrarçexe = "\"C:\\Users\\Admin\\AppData\\Roaming\\wınrarçexe.exe\""	938f4e648e57b9ad6d41ea3fe8707c0f249ba2baa24a5.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

938f4e648e57b9ad6d41ea3fe8707c0f249ba2baa24a5.exe

description pid process target process

PID 908 set thread context of 1992 908 938f4e648e57b9ad6d41ea3fe8707c0f249ba2baa24a5.exe InstallUtil.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

868 1992 WerFault.exe InstallUtil.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

powershell.exe938f4e648e57b9ad6d41ea3fe8707c0f249ba2baa24a5.exe

pid process

956 powershell.exe
908 938f4e648e57b9ad6d41ea3fe8707c0f249ba2baa24a5.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exe938f4e648e57b9ad6d41ea3fe8707c0f249ba2baa24a5.exe

description pid process

Token: SeDebugPrivilege 956 powershell.exe
Token: SeDebugPrivilege 908 938f4e648e57b9ad6d41ea3fe8707c0f249ba2baa24a5.exe

description	pid	process	target process
PID 908 set thread context of 1992	908	938f4e648e57b9ad6d41ea3fe8707c0f249ba2baa24a5.exe	InstallUtil.exe

pid	pid_target	process	target process
868	1992	WerFault.exe	InstallUtil.exe

pid	process
956	powershell.exe
908	938f4e648e57b9ad6d41ea3fe8707c0f249ba2baa24a5.exe

description	pid	process
Token: SeDebugPrivilege	956	powershell.exe
Token: SeDebugPrivilege	908	938f4e648e57b9ad6d41ea3fe8707c0f249ba2baa24a5.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

938f4e648e57b9ad6d41ea3fe8707c0f249ba2baa24a5.exeInstallUtil.exe

description	pid	process	target process
PID 908 wrote to memory of 956	908	938f4e648e57b9ad6d41ea3fe8707c0f249ba2baa24a5.exe	powershell.exe
PID 908 wrote to memory of 956	908	938f4e648e57b9ad6d41ea3fe8707c0f249ba2baa24a5.exe	powershell.exe
PID 908 wrote to memory of 956	908	938f4e648e57b9ad6d41ea3fe8707c0f249ba2baa24a5.exe	powershell.exe
PID 908 wrote to memory of 956	908	938f4e648e57b9ad6d41ea3fe8707c0f249ba2baa24a5.exe	powershell.exe
PID 908 wrote to memory of 1992	908	938f4e648e57b9ad6d41ea3fe8707c0f249ba2baa24a5.exe	InstallUtil.exe
PID 908 wrote to memory of 1992	908	938f4e648e57b9ad6d41ea3fe8707c0f249ba2baa24a5.exe	InstallUtil.exe
PID 908 wrote to memory of 1992	908	938f4e648e57b9ad6d41ea3fe8707c0f249ba2baa24a5.exe	InstallUtil.exe
PID 908 wrote to memory of 1992	908	938f4e648e57b9ad6d41ea3fe8707c0f249ba2baa24a5.exe	InstallUtil.exe
PID 908 wrote to memory of 1992	908	938f4e648e57b9ad6d41ea3fe8707c0f249ba2baa24a5.exe	InstallUtil.exe
PID 908 wrote to memory of 1992	908	938f4e648e57b9ad6d41ea3fe8707c0f249ba2baa24a5.exe	InstallUtil.exe
PID 908 wrote to memory of 1992	908	938f4e648e57b9ad6d41ea3fe8707c0f249ba2baa24a5.exe	InstallUtil.exe
PID 908 wrote to memory of 1992	908	938f4e648e57b9ad6d41ea3fe8707c0f249ba2baa24a5.exe	InstallUtil.exe
PID 908 wrote to memory of 1992	908	938f4e648e57b9ad6d41ea3fe8707c0f249ba2baa24a5.exe	InstallUtil.exe
PID 908 wrote to memory of 1992	908	938f4e648e57b9ad6d41ea3fe8707c0f249ba2baa24a5.exe	InstallUtil.exe
PID 908 wrote to memory of 1992	908	938f4e648e57b9ad6d41ea3fe8707c0f249ba2baa24a5.exe	InstallUtil.exe
PID 908 wrote to memory of 1992	908	938f4e648e57b9ad6d41ea3fe8707c0f249ba2baa24a5.exe	InstallUtil.exe
PID 908 wrote to memory of 1992	908	938f4e648e57b9ad6d41ea3fe8707c0f249ba2baa24a5.exe	InstallUtil.exe
PID 1992 wrote to memory of 868	1992	InstallUtil.exe	WerFault.exe
PID 1992 wrote to memory of 868	1992	InstallUtil.exe	WerFault.exe
PID 1992 wrote to memory of 868	1992	InstallUtil.exe	WerFault.exe
PID 1992 wrote to memory of 868	1992	InstallUtil.exe	WerFault.exe

C:\Users\Admin\AppData\Local\Temp\938f4e648e57b9ad6d41ea3fe8707c0f249ba2baa24a5.exe
"C:\Users\Admin\AppData\Local\Temp\938f4e648e57b9ad6d41ea3fe8707c0f249ba2baa24a5.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:908

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAAMgAwAA==
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:956

C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
2⤵
- Suspicious use of WriteProcessMemory
PID:1992

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1992 -s 716
3⤵
- Program crash
PID:868

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/868-78-0x0000000000000000-mapping.dmp

Download
memory/908-55-0x00000000007A0000-0x000000000080E000-memory.dmp

Filesize
440KB

Download
memory/908-56-0x0000000004740000-0x00000000047D2000-memory.dmp

Filesize
584KB

Download
memory/908-57-0x0000000075D21000-0x0000000075D23000-memory.dmp

Filesize
8KB

Download
memory/908-54-0x0000000000820000-0x0000000000898000-memory.dmp

Filesize
480KB

Download
memory/956-58-0x0000000000000000-mapping.dmp

Download
memory/956-60-0x000000006F2D0000-0x000000006F87B000-memory.dmp

Filesize
5.7MB

Download
memory/956-61-0x000000006F2D0000-0x000000006F87B000-memory.dmp

Filesize
5.7MB

Download
memory/956-62-0x000000006F2D0000-0x000000006F87B000-memory.dmp

Filesize
5.7MB

Download
memory/1992-63-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1992-66-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1992-68-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1992-70-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1992-72-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1992-73-0x000000000040717B-mapping.dmp

Download
memory/1992-75-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1992-77-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1992-64-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1992-79-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download

Analysis

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