oski | a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f

General

Target

8d97f71457a0a2977a82571583306c26_JaffaCakes118.exe
Size

396KB
MD5

8d97f71457a0a2977a82571583306c26
SHA1

936800c740c13a3fc2e05a1c1376007f58002a7d
SHA256

a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f
SHA512

5708375538d7b9927784809912a0b0588e200aaf62668226b9b83c2c4879306d989bef3033807bd7bb8989a56b58b2369b42327968f23f2dddc6d9b2975c51f5
SSDEEP

12288:7ycqterR53JplKiFwgxtQ9LdQAGAHUq/uzK6UA8t9HHHHHHHHHIHHHHHHczJXNAG:7QtervJXzQ9L

Score

10^/10

oski infostealer persistence spyware stealer

Malware Config

Extracted

Family

oski

C2

forum.daffodil-bd.com

Signatures

Oski
Oski is an infostealer targeting browser data, crypto wallets.
infostealer oski
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
T1552.001

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\Windows Services = "C:\\Users\\Admin\\AppData\\Roaming\\Windows Update Folder\\Windows Update.exe"	8d97f71457a0a2977a82571583306c26_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1504 set thread context of 2324	1504	8d97f71457a0a2977a82571583306c26_JaffaCakes118.exe	28

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2452	2324	WerFault.exe	28

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1504	8d97f71457a0a2977a82571583306c26_JaffaCakes118.exe
1504	8d97f71457a0a2977a82571583306c26_JaffaCakes118.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1504	8d97f71457a0a2977a82571583306c26_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1504 wrote to memory of 2324	1504	8d97f71457a0a2977a82571583306c26_JaffaCakes118.exe	28
PID 1504 wrote to memory of 2324	1504	8d97f71457a0a2977a82571583306c26_JaffaCakes118.exe	28
PID 1504 wrote to memory of 2324	1504	8d97f71457a0a2977a82571583306c26_JaffaCakes118.exe	28
PID 1504 wrote to memory of 2324	1504	8d97f71457a0a2977a82571583306c26_JaffaCakes118.exe	28
PID 1504 wrote to memory of 2324	1504	8d97f71457a0a2977a82571583306c26_JaffaCakes118.exe	28
PID 1504 wrote to memory of 2324	1504	8d97f71457a0a2977a82571583306c26_JaffaCakes118.exe	28
PID 1504 wrote to memory of 2324	1504	8d97f71457a0a2977a82571583306c26_JaffaCakes118.exe	28
PID 1504 wrote to memory of 2324	1504	8d97f71457a0a2977a82571583306c26_JaffaCakes118.exe	28
PID 1504 wrote to memory of 2324	1504	8d97f71457a0a2977a82571583306c26_JaffaCakes118.exe	28
PID 1504 wrote to memory of 2324	1504	8d97f71457a0a2977a82571583306c26_JaffaCakes118.exe	28
PID 2324 wrote to memory of 2452	2324	8d97f71457a0a2977a82571583306c26_JaffaCakes118.exe	30
PID 2324 wrote to memory of 2452	2324	8d97f71457a0a2977a82571583306c26_JaffaCakes118.exe	30
PID 2324 wrote to memory of 2452	2324	8d97f71457a0a2977a82571583306c26_JaffaCakes118.exe	30
PID 2324 wrote to memory of 2452	2324	8d97f71457a0a2977a82571583306c26_JaffaCakes118.exe	30

C:\Users\Admin\AppData\Local\Temp\8d97f71457a0a2977a82571583306c26_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\8d97f71457a0a2977a82571583306c26_JaffaCakes118.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1504
- C:\Users\Admin\AppData\Local\Temp\8d97f71457a0a2977a82571583306c26_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\8d97f71457a0a2977a82571583306c26_JaffaCakes118.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2324
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2324 -s 620
    3⤵
    - Program crash
    PID:2452

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\msvcp140.dll

Filesize
9KB

MD5
c75c339af917d6b6c5a281fb984cd007

SHA1
1330d44ede74c2b8e34823ffd0e864b1c282690d

SHA256
789bcff33cbe0e056e0844e76963bf63d653a6a356ae8ce59b8ff76f407e122d

SHA512
2f3ca1e7b34b7afa6a403bb74b1180f55a0233aea0a6c419a1eacfab11b614c48877b56172657d35188ce5cb27d29471a6c16443e84f428488a2d84c3d18a9d4

Download Submit
memory/1504-21-0x00000000743D0000-0x0000000074ABE000-memory.dmp

Filesize
6.9MB

Download
memory/1504-1-0x00000000743D0000-0x0000000074ABE000-memory.dmp

Filesize
6.9MB

Download
memory/1504-2-0x0000000000480000-0x0000000000486000-memory.dmp

Filesize
24KB

Download
memory/1504-3-0x00000000049F0000-0x0000000004A30000-memory.dmp

Filesize
256KB

Download
memory/1504-0-0x0000000001050000-0x00000000010BC000-memory.dmp

Filesize
432KB

Download
memory/1504-5-0x00000000004F0000-0x00000000004FA000-memory.dmp

Filesize
40KB

Download
memory/2324-6-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2324-14-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2324-18-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2324-16-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2324-20-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2324-8-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2324-10-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2324-22-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2324-12-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2324-32-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads