oski | adddf3a8edacd49f26632d6e2db61c77c1e4f52a0f3ef042528f15eba7aab610

General

Target

adddf3a8edacd49f26632d6e2db61c77c1e4f52a0f3ef042528f15eba7aab610.exe
Size

502KB
MD5

ab5be0d669ea17b096b0ab7f70c46d31
SHA1

c0baca7a79c5acbe9b1a326539798599308ad94b
SHA256

adddf3a8edacd49f26632d6e2db61c77c1e4f52a0f3ef042528f15eba7aab610
SHA512

81362639d5e390577403e299df111017ca0246092234c3bdb40968b9cab0ff4ddfaab51c2ed75d253dfd718c682da216ff4d544b828b102b8f94f297e3e55d42

Score

10^/10

oski infostealer rezer0

Malware Config

Extracted

Family

oski

C2

serhuwadwtr.xyz

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

resource	yara_rule
behavioral1/memory/1996-57-0x0000000002110000-0x000000000214C000-memory.dmp	rezer0

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1996 set thread context of 948	1996	adddf3a8edacd49f26632d6e2db61c77c1e4f52a0f3ef042528f15eba7aab610.exe	30

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
552	948	WerFault.exe	30

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

pid	Process
1660	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1996	adddf3a8edacd49f26632d6e2db61c77c1e4f52a0f3ef042528f15eba7aab610.exe
1996	adddf3a8edacd49f26632d6e2db61c77c1e4f52a0f3ef042528f15eba7aab610.exe
1996	adddf3a8edacd49f26632d6e2db61c77c1e4f52a0f3ef042528f15eba7aab610.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1996	adddf3a8edacd49f26632d6e2db61c77c1e4f52a0f3ef042528f15eba7aab610.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1996 wrote to memory of 1660	1996	adddf3a8edacd49f26632d6e2db61c77c1e4f52a0f3ef042528f15eba7aab610.exe	28
PID 1996 wrote to memory of 1660	1996	adddf3a8edacd49f26632d6e2db61c77c1e4f52a0f3ef042528f15eba7aab610.exe	28
PID 1996 wrote to memory of 1660	1996	adddf3a8edacd49f26632d6e2db61c77c1e4f52a0f3ef042528f15eba7aab610.exe	28
PID 1996 wrote to memory of 1660	1996	adddf3a8edacd49f26632d6e2db61c77c1e4f52a0f3ef042528f15eba7aab610.exe	28
PID 1996 wrote to memory of 948	1996	adddf3a8edacd49f26632d6e2db61c77c1e4f52a0f3ef042528f15eba7aab610.exe	30
PID 1996 wrote to memory of 948	1996	adddf3a8edacd49f26632d6e2db61c77c1e4f52a0f3ef042528f15eba7aab610.exe	30
PID 1996 wrote to memory of 948	1996	adddf3a8edacd49f26632d6e2db61c77c1e4f52a0f3ef042528f15eba7aab610.exe	30
PID 1996 wrote to memory of 948	1996	adddf3a8edacd49f26632d6e2db61c77c1e4f52a0f3ef042528f15eba7aab610.exe	30
PID 1996 wrote to memory of 948	1996	adddf3a8edacd49f26632d6e2db61c77c1e4f52a0f3ef042528f15eba7aab610.exe	30
PID 1996 wrote to memory of 948	1996	adddf3a8edacd49f26632d6e2db61c77c1e4f52a0f3ef042528f15eba7aab610.exe	30
PID 1996 wrote to memory of 948	1996	adddf3a8edacd49f26632d6e2db61c77c1e4f52a0f3ef042528f15eba7aab610.exe	30
PID 1996 wrote to memory of 948	1996	adddf3a8edacd49f26632d6e2db61c77c1e4f52a0f3ef042528f15eba7aab610.exe	30
PID 1996 wrote to memory of 948	1996	adddf3a8edacd49f26632d6e2db61c77c1e4f52a0f3ef042528f15eba7aab610.exe	30
PID 1996 wrote to memory of 948	1996	adddf3a8edacd49f26632d6e2db61c77c1e4f52a0f3ef042528f15eba7aab610.exe	30
PID 948 wrote to memory of 552	948	MSBuild.exe	34
PID 948 wrote to memory of 552	948	MSBuild.exe	34
PID 948 wrote to memory of 552	948	MSBuild.exe	34
PID 948 wrote to memory of 552	948	MSBuild.exe	34

C:\Users\Admin\AppData\Local\Temp\adddf3a8edacd49f26632d6e2db61c77c1e4f52a0f3ef042528f15eba7aab610.exe
"C:\Users\Admin\AppData\Local\Temp\adddf3a8edacd49f26632d6e2db61c77c1e4f52a0f3ef042528f15eba7aab610.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1996
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\NpBKSSqrmfw" /XML "C:\Users\Admin\AppData\Local\Temp\tmp687.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1660
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "{path}"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:948
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 948 -s 756
    3⤵
    - Program crash
    PID:552

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmp687.tmp

Filesize
1KB

MD5
2c6d8ea5f054dd66ab509b5f64f9c638

SHA1
561d1111af0786c21f72b69dde37dfd2f5dc49b3

SHA256
f269d395f28bd1b0e59fd798f31b9c0951d900e8101a3841673050a4cd8e89b3

SHA512
64941a9f1edaabf07a3c6cb5170ccf16ccf279e887d95450ac2a5d5e32ffa3effcb516c0097080280edbe46e546321e45f1281e7d80a228a7a52e4a55a5b88cc

Download Submit
memory/948-72-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/948-67-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/948-74-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/948-61-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/948-60-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/948-69-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/948-63-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/948-65-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/948-73-0x0000000075B71000-0x0000000075B73000-memory.dmp

Filesize
8KB

Download
memory/1996-54-0x00000000003D0000-0x0000000000458000-memory.dmp

Filesize
544KB

Download
memory/1996-57-0x0000000002110000-0x000000000214C000-memory.dmp

Filesize
240KB

Download
memory/1996-56-0x00000000003B0000-0x00000000003B8000-memory.dmp

Filesize
32KB

Download
memory/1996-55-0x0000000000620000-0x0000000000660000-memory.dmp

Filesize
256KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads