oski | a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f

General

Target

JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe
Size

396KB
MD5

8d97f71457a0a2977a82571583306c26
SHA1

936800c740c13a3fc2e05a1c1376007f58002a7d
SHA256

a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f
SHA512

5708375538d7b9927784809912a0b0588e200aaf62668226b9b83c2c4879306d989bef3033807bd7bb8989a56b58b2369b42327968f23f2dddc6d9b2975c51f5
SSDEEP

12288:7ycqterR53JplKiFwgxtQ9LdQAGAHUq/uzK6UA8t9HHHHHHHHHIHHHHHHczJXNAG:7QtervJXzQ9L

Score

10^/10

oski discovery 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
Oski family
oski
Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

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-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\Windows Services = "C:\\Users\\Admin\\AppData\\Roaming\\Windows Update Folder\\Windows Update.exe"	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2244 set thread context of 2820	2244	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe	30

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2020	2820	WerFault.exe	30

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2244	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe
2244	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe
2244	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2244	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2244 wrote to memory of 2820	2244	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe	30
PID 2244 wrote to memory of 2820	2244	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe	30
PID 2244 wrote to memory of 2820	2244	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe	30
PID 2244 wrote to memory of 2820	2244	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe	30
PID 2244 wrote to memory of 2820	2244	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe	30
PID 2244 wrote to memory of 2820	2244	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe	30
PID 2244 wrote to memory of 2820	2244	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe	30
PID 2244 wrote to memory of 2820	2244	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe	30
PID 2244 wrote to memory of 2820	2244	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe	30
PID 2244 wrote to memory of 2820	2244	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe	30
PID 2820 wrote to memory of 2020	2820	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe	32
PID 2820 wrote to memory of 2020	2820	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe	32
PID 2820 wrote to memory of 2020	2820	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe	32
PID 2820 wrote to memory of 2020	2820	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe	32

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2244
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe
  "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2820
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2820 -s 608
    3⤵
    - Program crash
    PID:2020

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

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\msvcp140.dll

Filesize
10KB

MD5
380cf607d8dc4a46a0fdedeb314abc7e

SHA1
19420779b68f070f435938c3add30f9591638279

SHA256
91a12d99cc005ceb5a9c84a5dbf77e074f41b1843a46beb66c227fdadaf30924

SHA512
3de7301666e2f2d5fd9f922407387b2d5b29b3bc1b15bc542485d7193fb36ea66f4fef9c34ce3dc6296cedfeaf782addc058438ec65ff3fcdb5b9d5fc6db3296

Download Submit
memory/2244-0-0x00000000747CE000-0x00000000747CF000-memory.dmp

Filesize
4KB

Download
memory/2244-1-0x0000000000C00000-0x0000000000C6C000-memory.dmp

Filesize
432KB

Download
memory/2244-2-0x00000000002F0000-0x00000000002F6000-memory.dmp

Filesize
24KB

Download
memory/2244-4-0x0000000000330000-0x000000000033A000-memory.dmp

Filesize
40KB

Download
memory/2244-5-0x00000000747C0000-0x0000000074EAE000-memory.dmp

Filesize
6.9MB

Download
memory/2244-21-0x00000000747C0000-0x0000000074EAE000-memory.dmp

Filesize
6.9MB

Download
memory/2820-12-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2820-16-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2820-10-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2820-6-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2820-8-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2820-20-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2820-18-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2820-22-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2820-14-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2820-47-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads