oski | e636e864524817c9421705c33e3606c5d8b46ece43aaafe10cbb8e66bfd84558

General

Target

218629c4a1eab5657a91cf9ea1076ce2_JaffaCakes118.exe
Size

362KB
MD5

218629c4a1eab5657a91cf9ea1076ce2
SHA1

960eeacd041dea710abf0ea985ce43edac10e0ca
SHA256

e636e864524817c9421705c33e3606c5d8b46ece43aaafe10cbb8e66bfd84558
SHA512

48995aa257f5da090c98c8d5d345304b03fc4ffa6298947243b1b42934fee82398953a1da7c6823705f3e2f36b7c39abc8eeff93b2a751bbc286455f58f534d8
SSDEEP

6144:9qm4F/+rqgvDkS1ScNX5tn9LSpEQ4sxBy2V1kAqnnYGZLfmfRPyAfDybP2FFFF4q:IeqgvDkIDR5tn9LoHLy2VN7cjmfRPyA1

Score

10^/10

oski discovery infostealer

Malware Config

Extracted

Family

oski

C2

45.8.228.100

Signatures

Oski
Oski is an infostealer targeting browser data, crypto wallets.
infostealer oski
Suspicious use of SetThreadContext 1 IoCs

Processes:

218629c4a1eab5657a91cf9ea1076ce2_JaffaCakes118.exe

description pid process target process

PID 1592 set thread context of 1452 1592 218629c4a1eab5657a91cf9ea1076ce2_JaffaCakes118.exe ngen.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1940 1452 WerFault.exe ngen.exe

description	pid	process	target process
PID 1592 set thread context of 1452	1592	218629c4a1eab5657a91cf9ea1076ce2_JaffaCakes118.exe	ngen.exe

pid	pid_target	process	target process
1940	1452	WerFault.exe	ngen.exe

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:

218629c4a1eab5657a91cf9ea1076ce2_JaffaCakes118.exengen.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	218629c4a1eab5657a91cf9ea1076ce2_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ngen.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

218629c4a1eab5657a91cf9ea1076ce2_JaffaCakes118.exengen.exe

description	pid	process	target process
PID 1592 wrote to memory of 1452	1592	218629c4a1eab5657a91cf9ea1076ce2_JaffaCakes118.exe	ngen.exe
PID 1592 wrote to memory of 1452	1592	218629c4a1eab5657a91cf9ea1076ce2_JaffaCakes118.exe	ngen.exe
PID 1592 wrote to memory of 1452	1592	218629c4a1eab5657a91cf9ea1076ce2_JaffaCakes118.exe	ngen.exe
PID 1592 wrote to memory of 1452	1592	218629c4a1eab5657a91cf9ea1076ce2_JaffaCakes118.exe	ngen.exe
PID 1592 wrote to memory of 1452	1592	218629c4a1eab5657a91cf9ea1076ce2_JaffaCakes118.exe	ngen.exe
PID 1592 wrote to memory of 1452	1592	218629c4a1eab5657a91cf9ea1076ce2_JaffaCakes118.exe	ngen.exe
PID 1592 wrote to memory of 1452	1592	218629c4a1eab5657a91cf9ea1076ce2_JaffaCakes118.exe	ngen.exe
PID 1592 wrote to memory of 1452	1592	218629c4a1eab5657a91cf9ea1076ce2_JaffaCakes118.exe	ngen.exe
PID 1592 wrote to memory of 1452	1592	218629c4a1eab5657a91cf9ea1076ce2_JaffaCakes118.exe	ngen.exe
PID 1592 wrote to memory of 1452	1592	218629c4a1eab5657a91cf9ea1076ce2_JaffaCakes118.exe	ngen.exe
PID 1452 wrote to memory of 1940	1452	ngen.exe	WerFault.exe
PID 1452 wrote to memory of 1940	1452	ngen.exe	WerFault.exe
PID 1452 wrote to memory of 1940	1452	ngen.exe	WerFault.exe
PID 1452 wrote to memory of 1940	1452	ngen.exe	WerFault.exe

C:\Users\Admin\AppData\Local\Temp\218629c4a1eab5657a91cf9ea1076ce2_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\218629c4a1eab5657a91cf9ea1076ce2_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1592
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1452
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1452 -s 112
    3⤵
    - Program crash
    PID:1940

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1452-13-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1452-14-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/1452-15-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1452-8-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1452-9-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1452-10-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1452-11-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1452-17-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1592-5-0x0000000073B90000-0x000000007427E000-memory.dmp

Filesize
6.9MB

Download
memory/1592-4-0x0000000073B9E000-0x0000000073B9F000-memory.dmp

Filesize
4KB

Download
memory/1592-7-0x0000000000490000-0x00000000004A4000-memory.dmp

Filesize
80KB

Download
memory/1592-2-0x0000000000470000-0x0000000000476000-memory.dmp

Filesize
24KB

Download
memory/1592-0-0x0000000073B9E000-0x0000000073B9F000-memory.dmp

Filesize
4KB

Download
memory/1592-6-0x00000000004E0000-0x0000000000514000-memory.dmp

Filesize
208KB

Download
memory/1592-1-0x00000000008C0000-0x000000000091E000-memory.dmp

Filesize
376KB

Download
memory/1592-18-0x0000000073B90000-0x000000007427E000-memory.dmp

Filesize
6.9MB

Download
memory/1592-3-0x0000000073B90000-0x000000007427E000-memory.dmp

Filesize
6.9MB

Download

Analysis

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