oski | cabe623befbaa25599e9c97bef6be8175332b29c6571a2c8e755c7a732beedbd

General

Target
c43d068c4d5d5639bc78f512b21ffdb4.exe
Size 495KB
Sample211217-te3beadgh5
SHA256 cabe623befbaa25599e9c97bef6be8175332b29c6571a2c8e755c7a732beedbd
MD5 c43d068c4d5d5639bc78f512b21ffdb4
SHA1 3ed1d8d84dad394f02215be758ffa44dd7369a87
SHA512 939edea866db55caa17f43d3537a40c4ec39df7630f0240fcef9e83cd474228706bf3b94fd147f82d661e9e04294a00d25989d9c0b2a82b3578591537d05667d
MD5 SHA1 SHA512

Score

10^/10

oski discovery infostealer spyware stealer

Malware Config

Extracted

Family

oski

C2

golfhomexpresx.ir

Signatures

Oski
Oski is an infostealer targeting browser data, crypto wallets.
infostealer oski
Downloads MZ/PE file

Loads dropped DLL 3 IoCs

pid	Process
3492	c43d068c4d5d5639bc78f512b21ffdb4.exe
3492	c43d068c4d5d5639bc78f512b21ffdb4.exe
3492	c43d068c4d5d5639bc78f512b21ffdb4.exe

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
T1081
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2768 set thread context of 3492	2768	c43d068c4d5d5639bc78f512b21ffdb4.exe	68

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

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 1 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	c43d068c4d5d5639bc78f512b21ffdb4.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
2252	taskkill.exe

NTFS ADS 1 IoCs

description	ioc	Process
File created	C:\ProgramData\327397264569.exe:Zone.Identifier	c43d068c4d5d5639bc78f512b21ffdb4.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2252	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2768 wrote to memory of 3492	2768	c43d068c4d5d5639bc78f512b21ffdb4.exe	68
PID 2768 wrote to memory of 3492	2768	c43d068c4d5d5639bc78f512b21ffdb4.exe	68
PID 2768 wrote to memory of 3492	2768	c43d068c4d5d5639bc78f512b21ffdb4.exe	68
PID 2768 wrote to memory of 3492	2768	c43d068c4d5d5639bc78f512b21ffdb4.exe	68
PID 2768 wrote to memory of 3492	2768	c43d068c4d5d5639bc78f512b21ffdb4.exe	68
PID 2768 wrote to memory of 3492	2768	c43d068c4d5d5639bc78f512b21ffdb4.exe	68
PID 2768 wrote to memory of 3492	2768	c43d068c4d5d5639bc78f512b21ffdb4.exe	68
PID 2768 wrote to memory of 3492	2768	c43d068c4d5d5639bc78f512b21ffdb4.exe	68
PID 2768 wrote to memory of 3492	2768	c43d068c4d5d5639bc78f512b21ffdb4.exe	68
PID 3492 wrote to memory of 1220	3492	c43d068c4d5d5639bc78f512b21ffdb4.exe	69
PID 3492 wrote to memory of 1220	3492	c43d068c4d5d5639bc78f512b21ffdb4.exe	69
PID 3492 wrote to memory of 1220	3492	c43d068c4d5d5639bc78f512b21ffdb4.exe	69
PID 1220 wrote to memory of 2252	1220	cmd.exe	71
PID 1220 wrote to memory of 2252	1220	cmd.exe	71
PID 1220 wrote to memory of 2252	1220	cmd.exe	71

C:\Users\Admin\AppData\Local\Temp\c43d068c4d5d5639bc78f512b21ffdb4.exe
"C:\Users\Admin\AppData\Local\Temp\c43d068c4d5d5639bc78f512b21ffdb4.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2768
- C:\Users\Admin\AppData\Local\Temp\c43d068c4d5d5639bc78f512b21ffdb4.exe
  "C:\Users\Admin\AppData\Local\Temp\c43d068c4d5d5639bc78f512b21ffdb4.exe"
  2⤵
  - Loads dropped DLL
  - Checks processor information in registry
  - NTFS ADS
  - Suspicious use of WriteProcessMemory
  PID:3492
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c taskkill /pid 3492 & erase C:\Users\Admin\AppData\Local\Temp\c43d068c4d5d5639bc78f512b21ffdb4.exe & RD /S /Q C:\\ProgramData\\245270969266070\\* & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1220
  - - C:\Windows\SysWOW64\taskkill.exe
      taskkill /pid 3492
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:2252

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

2

T1081

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/2768-120-0x0000000006790000-0x0000000006791000-memory.dmp

Download

memory/2768-122-0x0000000006470000-0x0000000006478000-memory.dmp

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memory/2768-123-0x0000000006480000-0x0000000006481000-memory.dmp

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memory/2768-124-0x0000000006930000-0x0000000006994000-memory.dmp

Download

memory/2768-121-0x0000000005890000-0x0000000005D8E000-memory.dmp

Download

memory/2768-115-0x0000000000EA0000-0x0000000000EA1000-memory.dmp

Download

memory/2768-119-0x0000000005810000-0x0000000005811000-memory.dmp

Download

memory/2768-118-0x0000000005770000-0x0000000005771000-memory.dmp

Download

memory/2768-117-0x0000000005D90000-0x0000000005D91000-memory.dmp

Download

memory/3492-125-0x0000000000400000-0x0000000000438000-memory.dmp

Download

memory/3492-127-0x0000000000400000-0x0000000000438000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads