oski | 4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1

General

Target

4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe
Size

871KB
MD5

7380ccfe1c66527f163845b5532cf5db
SHA1

916cbf2b90d81317b4a8310a7b2ef0a8156faa7e
SHA256

4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1
SHA512

e9a94983c83cd419089caf87955f0767f97729c8ae713d98f4a343bb1caa6a963904753093da96b4574b96d706f8ec9c4f86ae4bd981135f34a9fa16a36f5eea

Score

10^/10

oski infostealer rezer0 spyware stealer vmprotect

Malware Config

Extracted

Family

oski

C2

www.emailonlinechase.com

Signatures

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

ReZer0 packer 1 IoCs

Detects ReZer0, a packer with multiple versions used in various campaigns.

rezer0

Processes:

resource	yara_rule
behavioral1/memory/1636-57-0x00000000006F0000-0x000000000072C000-memory.dmp	rezer0

VMProtect packed file 1 IoCs

Detects executables packed with VMProtect commercial packer.

vmprotect

Processes:

resource	yara_rule
behavioral1/memory/1636-54-0x0000000000080000-0x0000000000148000-memory.dmp	vmprotect

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:

4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe

description	pid	process	target process
PID 1636 set thread context of 852	1636	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1808 852 WerFault.exe 4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe

pid	pid_target	process	target process
1808	852	WerFault.exe	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exeWerFault.exe

pid	process
1636	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe
1808	WerFault.exe
1808	WerFault.exe
1808	WerFault.exe
1808	WerFault.exe
1808	WerFault.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exeWerFault.exe

description	pid	process
Token: SeDebugPrivilege	1636	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe
Token: SeDebugPrivilege	1808	WerFault.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe

C:\Users\Admin\AppData\Local\Temp\4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe
"C:\Users\Admin\AppData\Local\Temp\4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1636

C:\Users\Admin\AppData\Local\Temp\4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe
"{path}"
2⤵
PID:1076

C:\Users\Admin\AppData\Local\Temp\4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe
"{path}"
2⤵
- Suspicious use of WriteProcessMemory
PID:852

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 852 -s 860
3⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1808

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/852-58-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/852-59-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/852-61-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/852-60-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/852-62-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/852-63-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/852-65-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/1636-54-0x0000000000080000-0x0000000000148000-memory.dmp

Filesize
800KB

Download
memory/1636-55-0x0000000075021000-0x0000000075023000-memory.dmp

Filesize
8KB

Download
memory/1636-56-0x0000000004EF0000-0x0000000004EF1000-memory.dmp

Filesize
4KB

Download
memory/1636-57-0x00000000006F0000-0x000000000072C000-memory.dmp

Filesize
240KB

Download
memory/1808-67-0x0000000000510000-0x0000000000511000-memory.dmp

Filesize
4KB

Download

description	pid	process	target process
PID 1636 wrote to memory of 1076	1636	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe
PID 1636 wrote to memory of 1076	1636	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe
PID 1636 wrote to memory of 1076	1636	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe
PID 1636 wrote to memory of 1076	1636	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe
PID 1636 wrote to memory of 852	1636	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe
PID 1636 wrote to memory of 852	1636	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe
PID 1636 wrote to memory of 852	1636	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe
PID 1636 wrote to memory of 852	1636	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe
PID 1636 wrote to memory of 852	1636	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe
PID 1636 wrote to memory of 852	1636	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe
PID 1636 wrote to memory of 852	1636	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe
PID 1636 wrote to memory of 852	1636	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe
PID 1636 wrote to memory of 852	1636	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe
PID 1636 wrote to memory of 852	1636	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe
PID 852 wrote to memory of 1808	852	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe	WerFault.exe
PID 852 wrote to memory of 1808	852	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe	WerFault.exe
PID 852 wrote to memory of 1808	852	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe	WerFault.exe
PID 852 wrote to memory of 1808	852	4ae1f055edea4c9667047ce00c62924d58278e47ca8262725a89ae5c77354eb1.exe	WerFault.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads