oski | 42c682af79cf1b73127ebf00349a8c4cabccdf42d2e14f77cda67121f870d8bf

General

Target

03972c7f3b0df942d4e0a1e11956e523_JaffaCakes118.exe
Size

884KB
MD5

03972c7f3b0df942d4e0a1e11956e523
SHA1

55675cc5594b4731ab268fa2e1ff35df892de7df
SHA256

42c682af79cf1b73127ebf00349a8c4cabccdf42d2e14f77cda67121f870d8bf
SHA512

2d3b1865a41cbf9d6d909d481e7275ff0adda1b8a404b1015e9ff74c943509cdd490ebb5252301609f12f75c392275bc382b21d9044c86d0aef394c937b43ca1
SSDEEP

12288:PdjGXt2ghPHK7zt4QKvq7Mlax3UAXynyGPl+U8av4ORx:VGXt2g4R3Kvsl3XOd8LC

Score

10^/10

oski discovery infostealer spyware stealer

Malware Config

Extracted

Family

oski

C2

soitaab.co/make/

Signatures

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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

03972c7f3b0df942d4e0a1e11956e523_JaffaCakes118.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-523280732-2327480845-3730041215-1000\Control Panel\International\Geo\Nation	03972c7f3b0df942d4e0a1e11956e523_JaffaCakes118.exe

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

Suspicious use of SetThreadContext 1 IoCs

Processes:

03972c7f3b0df942d4e0a1e11956e523_JaffaCakes118.exe

description	pid	Process	procid_target
PID 4236 set thread context of 3808	4236	03972c7f3b0df942d4e0a1e11956e523_JaffaCakes118.exe	93

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

Processes:

WerFault.exe

pid	pid_target	Process	procid_target
1044	3808	WerFault.exe	93

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

Processes:

schtasks.exe03972c7f3b0df942d4e0a1e11956e523_JaffaCakes118.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	03972c7f3b0df942d4e0a1e11956e523_JaffaCakes118.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

Processes:

schtasks.exe

pid	Process
4000	schtasks.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

03972c7f3b0df942d4e0a1e11956e523_JaffaCakes118.exe

description	pid	Process	procid_target
PID 4236 wrote to memory of 4000	4236	03972c7f3b0df942d4e0a1e11956e523_JaffaCakes118.exe	91
PID 4236 wrote to memory of 4000	4236	03972c7f3b0df942d4e0a1e11956e523_JaffaCakes118.exe	91
PID 4236 wrote to memory of 4000	4236	03972c7f3b0df942d4e0a1e11956e523_JaffaCakes118.exe	91
PID 4236 wrote to memory of 3808	4236	03972c7f3b0df942d4e0a1e11956e523_JaffaCakes118.exe	93
PID 4236 wrote to memory of 3808	4236	03972c7f3b0df942d4e0a1e11956e523_JaffaCakes118.exe	93
PID 4236 wrote to memory of 3808	4236	03972c7f3b0df942d4e0a1e11956e523_JaffaCakes118.exe	93
PID 4236 wrote to memory of 3808	4236	03972c7f3b0df942d4e0a1e11956e523_JaffaCakes118.exe	93
PID 4236 wrote to memory of 3808	4236	03972c7f3b0df942d4e0a1e11956e523_JaffaCakes118.exe	93
PID 4236 wrote to memory of 3808	4236	03972c7f3b0df942d4e0a1e11956e523_JaffaCakes118.exe	93
PID 4236 wrote to memory of 3808	4236	03972c7f3b0df942d4e0a1e11956e523_JaffaCakes118.exe	93
PID 4236 wrote to memory of 3808	4236	03972c7f3b0df942d4e0a1e11956e523_JaffaCakes118.exe	93
PID 4236 wrote to memory of 3808	4236	03972c7f3b0df942d4e0a1e11956e523_JaffaCakes118.exe	93

C:\Users\Admin\AppData\Local\Temp\03972c7f3b0df942d4e0a1e11956e523_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\03972c7f3b0df942d4e0a1e11956e523_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4236
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\pxOIUAzyZ" /XML "C:\Users\Admin\AppData\Local\Temp\tmp6D1D.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:4000
- C:\Users\Admin\AppData\Local\Temp\03972c7f3b0df942d4e0a1e11956e523_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\03972c7f3b0df942d4e0a1e11956e523_JaffaCakes118.exe"
  2⤵
  PID:3808
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3808 -s 1312
    3⤵
    - Program crash
    PID:1044

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3808 -ip 3808
1⤵
PID:3688

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

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

Query Registry

1

T1012

System Information Discovery

2

T1082

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:\Users\Admin\AppData\Local\Temp\tmp6D1D.tmp

Filesize
1KB

MD5
274829b2a63e49fc802130c9a773b4cf

SHA1
031c25224cad796e393e3012bac87114016e554c

SHA256
b434d1bbbd7169c84dff7cc2e8748c2cfcfa7d0e0e718dab9a84cb55a95ba1e4

SHA512
ebad3730dea9df41d0a24fce860196ef22321659078780cb8adf181fb75ccaa2733fa7faeb3087fc5357047870b1b0183407cca11840b43f4831811bb39d58bc

Download Submit
memory/3808-26-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/3808-22-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/3808-21-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/3808-19-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/3808-18-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4236-5-0x0000000004F90000-0x0000000004F9A000-memory.dmp

Filesize
40KB

Download
memory/4236-6-0x0000000005270000-0x00000000052C6000-memory.dmp

Filesize
344KB

Download
memory/4236-8-0x00000000055D0000-0x00000000055E6000-memory.dmp

Filesize
88KB

Download
memory/4236-9-0x000000007458E000-0x000000007458F000-memory.dmp

Filesize
4KB

Download
memory/4236-10-0x0000000074580000-0x0000000074D30000-memory.dmp

Filesize
7.7MB

Download
memory/4236-11-0x0000000006ED0000-0x0000000006F74000-memory.dmp

Filesize
656KB

Download
memory/4236-12-0x0000000009570000-0x00000000095A8000-memory.dmp

Filesize
224KB

Download
memory/4236-7-0x0000000074580000-0x0000000074D30000-memory.dmp

Filesize
7.7MB

Download
memory/4236-0-0x000000007458E000-0x000000007458F000-memory.dmp

Filesize
4KB

Download
memory/4236-4-0x0000000005040000-0x00000000050D2000-memory.dmp

Filesize
584KB

Download
memory/4236-3-0x00000000055F0000-0x0000000005B94000-memory.dmp

Filesize
5.6MB

Download
memory/4236-2-0x0000000004FA0000-0x000000000503C000-memory.dmp

Filesize
624KB

Download
memory/4236-23-0x0000000074580000-0x0000000074D30000-memory.dmp

Filesize
7.7MB

Download
memory/4236-1-0x0000000000500000-0x00000000005E4000-memory.dmp

Filesize
912KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads