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-1-5-21-4089630652-1596403869-279772308-1000\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 4988 set thread context of 3172	4988	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe	82

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4412	3172	WerFault.exe	82

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
4988	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe
4988	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe
4988	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4988	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4988 wrote to memory of 3172	4988	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe	82
PID 4988 wrote to memory of 3172	4988	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe	82
PID 4988 wrote to memory of 3172	4988	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe	82
PID 4988 wrote to memory of 3172	4988	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe	82
PID 4988 wrote to memory of 3172	4988	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe	82
PID 4988 wrote to memory of 3172	4988	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe	82
PID 4988 wrote to memory of 3172	4988	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe	82
PID 4988 wrote to memory of 3172	4988	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe	82
PID 4988 wrote to memory of 3172	4988	JaffaCakes118_8d97f71457a0a2977a82571583306c26.exe	82

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:4988
- 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
  PID:3172
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3172 -s 1732
    3⤵
    - Program crash
    PID:4412

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3172 -ip 3172
1⤵
PID:336

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
36992e384a7fcb5877c9bc382b62263a

SHA1
24dcda966300648f7320f9e0cb14cf67b8d846c1

SHA256
02df8943fa1bc29fccdaee676c46d1c10cb6f004f6c031336289132335a26ed9

SHA512
2e4a5f3d7b3c96b2bb8fcd790c5f9415ecbd6a7d35fba8c5b792704948d5e189879c50845dc350d0395677615d41faeeb0d18507727559c5a18e87ce054fc513

Download Submit
memory/3172-9-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/3172-31-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/3172-13-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/3172-12-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/3172-10-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4988-3-0x000000000AAC0000-0x000000000B064000-memory.dmp

Filesize
5.6MB

Download
memory/4988-6-0x000000000A790000-0x000000000A82C000-memory.dmp

Filesize
624KB

Download
memory/4988-8-0x000000000A670000-0x000000000A67A000-memory.dmp

Filesize
40KB

Download
memory/4988-5-0x000000000A6F0000-0x000000000A782000-memory.dmp

Filesize
584KB

Download
memory/4988-4-0x00000000753A0000-0x0000000075B50000-memory.dmp

Filesize
7.7MB

Download
memory/4988-0-0x00000000753AE000-0x00000000753AF000-memory.dmp

Filesize
4KB

Download
memory/4988-14-0x00000000753A0000-0x0000000075B50000-memory.dmp

Filesize
7.7MB

Download
memory/4988-2-0x0000000000FA0000-0x0000000000FA6000-memory.dmp

Filesize
24KB

Download
memory/4988-1-0x0000000000580000-0x00000000005EC000-memory.dmp

Filesize
432KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads