oski | 5389a958986f6ceccaa9e44006852becbccabfb07f126d69e6b031227fb0b487

Analysis

max time kernel
140s
max time network
129s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
26-07-2024 10:46

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General

Target

73b8f1ec16231a14550fc51007ad07d3_JaffaCakes118.exe
Size

494KB
MD5

73b8f1ec16231a14550fc51007ad07d3
SHA1

63f959b1df1e38137b14f5f14cb216b8c96dbd84
SHA256

5389a958986f6ceccaa9e44006852becbccabfb07f126d69e6b031227fb0b487
SHA512

b807774fcd2031715a1249b06138afe88ccc032857fecc0bea259e3be34e2e29a785e6c4ae314e7262872ca1309cd6bdf252cb3bf61efea67ab1ba08c500962b
SSDEEP

12288:tozjuOV98Gvx2jn5CEyUFqSP5NDUGvbbm:tgjV98GvUj5C8F35N5jbm

Score

10^/10

oski stormkitty credential_access discovery infostealer spyware stealer

Malware Config

Signatures

Oski
Oski is an infostealer targeting browser data, crypto wallets.
infostealer oski
StormKitty
StormKitty is an open source info stealer written in C#.
stealer stormkitty

StormKitty payload 2 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\build.exe	family_stormkitty
behavioral2/memory/1820-162-0x0000000000160000-0x0000000000182000-memory.dmp	family_stormkitty

Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

Checks computer location settings 2 TTPs 3 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

73b8f1ec16231a14550fc51007ad07d3_JaffaCakes118.exechrmuim2.execmd...exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-47134698-4092160662-1261813102-1000\Control Panel\International\Geo\Nation	73b8f1ec16231a14550fc51007ad07d3_JaffaCakes118.exe
Key value queried	\REGISTRY\USER\S-1-5-21-47134698-4092160662-1261813102-1000\Control Panel\International\Geo\Nation	chrmuim2.exe
Key value queried	\REGISTRY\USER\S-1-5-21-47134698-4092160662-1261813102-1000\Control Panel\International\Geo\Nation	cmd...exe

Executes dropped EXE 4 IoCs

Processes:

cmd...exechrmuim2.exechrmuim.exebuild.exe

pid process

868 cmd...exe
2780 chrmuim2.exe
3936 chrmuim.exe
1820 build.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
T1552.001
Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service
T1102

Processes:

flow ioc

20 raw.githubusercontent.com
23 raw.githubusercontent.com
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 target process

2636 3936 WerFault.exe chrmuim.exe

pid	process
868	cmd...exe
2780	chrmuim2.exe
3936	chrmuim.exe
1820	build.exe

flow	ioc
20	raw.githubusercontent.com
23	raw.githubusercontent.com

pid	pid_target	process	target process
2636	3936	WerFault.exe	chrmuim.exe

System Location Discovery: System Language Discovery 1 TTPs 5 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:

73b8f1ec16231a14550fc51007ad07d3_JaffaCakes118.execmd...exechrmuim2.exechrmuim.exebuild.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	73b8f1ec16231a14550fc51007ad07d3_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd...exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	chrmuim2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	chrmuim.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	build.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

cmd...exechrmuim2.exebuild.exe

description pid process

Token: SeDebugPrivilege 868 cmd...exe
Token: SeDebugPrivilege 2780 chrmuim2.exe
Token: SeDebugPrivilege 1820 build.exe

description	pid	process
Token: SeDebugPrivilege	868	cmd...exe
Token: SeDebugPrivilege	2780	chrmuim2.exe
Token: SeDebugPrivilege	1820	build.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

73b8f1ec16231a14550fc51007ad07d3_JaffaCakes118.exechrmuim2.execmd...exe

description	pid	process	target process
PID 4440 wrote to memory of 868	4440	73b8f1ec16231a14550fc51007ad07d3_JaffaCakes118.exe	cmd...exe
PID 4440 wrote to memory of 868	4440	73b8f1ec16231a14550fc51007ad07d3_JaffaCakes118.exe	cmd...exe
PID 4440 wrote to memory of 868	4440	73b8f1ec16231a14550fc51007ad07d3_JaffaCakes118.exe	cmd...exe
PID 4440 wrote to memory of 2780	4440	73b8f1ec16231a14550fc51007ad07d3_JaffaCakes118.exe	chrmuim2.exe
PID 4440 wrote to memory of 2780	4440	73b8f1ec16231a14550fc51007ad07d3_JaffaCakes118.exe	chrmuim2.exe
PID 4440 wrote to memory of 2780	4440	73b8f1ec16231a14550fc51007ad07d3_JaffaCakes118.exe	chrmuim2.exe
PID 2780 wrote to memory of 3936	2780	chrmuim2.exe	chrmuim.exe
PID 2780 wrote to memory of 3936	2780	chrmuim2.exe	chrmuim.exe
PID 2780 wrote to memory of 3936	2780	chrmuim2.exe	chrmuim.exe
PID 868 wrote to memory of 1820	868	cmd...exe	build.exe
PID 868 wrote to memory of 1820	868	cmd...exe	build.exe
PID 868 wrote to memory of 1820	868	cmd...exe	build.exe

C:\Users\Admin\AppData\Local\Temp\73b8f1ec16231a14550fc51007ad07d3_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\73b8f1ec16231a14550fc51007ad07d3_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4440
- C:\Users\Admin\AppData\Local\Temp\cmd...exe
  "C:\Users\Admin\AppData\Local\Temp\cmd...exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:868
- - C:\Users\Admin\AppData\Local\Temp\build.exe
    "C:\Users\Admin\AppData\Local\Temp\build.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:1820
- C:\Users\Admin\AppData\Local\Temp\chrmuim2.exe
  "C:\Users\Admin\AppData\Local\Temp\chrmuim2.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2780
- - C:\Users\Admin\AppData\Local\Temp\chrmuim.exe
    "C:\Users\Admin\AppData\Local\Temp\chrmuim.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:3936
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3936 -s 1356
      4⤵
      Program crash
      PID:2636

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 3936 -ip 3936
1⤵
PID:4372

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

C:\ProgramData\msvcp140.dll

Filesize
9KB

MD5
ad1c220bba8b97e72947a809b005d524

SHA1
a9b796c58d020a27a78edc16c2cc363e5246e5a8

SHA256
784e2d06d16a3b96904a281febee19358ac1eafdea4f07ecc03032492de09bbb

SHA512
005647ebfde3b857c68ebe89854a7bb08a62ae38b669d92df7fbfa7e1e29d4813a2477d11410bfcda3c13f4ae240788c785b44601ffb80db759853dd61f63c5f

Download Submit
C:\Users\Admin\AppData\Local\Temp\build.exe

Filesize
110KB

MD5
198d38f9365499a5b3d62682b6c5afec

SHA1
cdeb1cbfafdeef9749f5994608f454e04ce6e6b3

SHA256
a56508a041a5b5870578d9f5a1db6ec7186a74a50b391bd6506e9b62022bdf2e

SHA512
4c542522aaf95bf3b2e74c197c92bfd517b65c10f68f75e9379a054ab98b6d17dc7e41332aaf60622ac0a584ecc420d79e27fd6b98d4130f8810ffaf0a8096b3

Download Submit
C:\Users\Admin\AppData\Local\Temp\chrmuim.exe

Filesize
200KB

MD5
35958a7d85fc88a18f931ee14e6ec531

SHA1
087fedd2ac4fe703da8ad32957998d1dffcb728b

SHA256
73fbf9c783b7e3a941837995f1a5181eca114e8923d6cc7ffb362ea88a8d0ba3

SHA512
de7cb672507d2c2c6de27301a36507939be19231ff97c1c062e2cfda354b4e89f42570f448f8f24e3d8714d6d651b484bc36a8f4dbd53c3e6b968ef002fdb489

Download Submit
C:\Users\Admin\AppData\Local\Temp\chrmuim2.exe

Filesize
301KB

MD5
5e45692f423e4f683e1c246679e6d572

SHA1
bdc1cf9aa3625fc0d514628a55c767c8ed07e17b

SHA256
d40dedd7f637a1ef9703b582a6d536469d1cf62bddc1a462a9cceeb7f9194f13

SHA512
93de1b3cc9601adc6af8c2bdedec1633dfd82cc6a09d327836df2af628423db52174e1d9f6a241045a9ef593f0edd65e2b3a2797a64cbed73b2c54231ba0692c

Download Submit
C:\Users\Admin\AppData\Local\Temp\cmd...exe

Filesize
254KB

MD5
ac48ddde88a9241a4598c91a27e6ecff

SHA1
baa6666d66fbeb3c9c23b98837d3566582bcfa1d

SHA256
1abbd40c3e08f27a0d7e8f58a4c53c04e062267ed0200d92d2687954689139ab

SHA512
1099f4dfd57d3ab06e18378e7e17fff390e68889c39360556368d70f28db314e6134df802c92cfd552b74d9e5ca1f1bad5f423befd63fdfad588a5b11c0cc0d0

Download Submit
memory/868-96-0x00000000049B0000-0x00000000049D8000-memory.dmp

Filesize
160KB

Download
memory/868-160-0x0000000073A70000-0x0000000074220000-memory.dmp

Filesize
7.7MB

Download
memory/868-83-0x00000000049B0000-0x00000000049D8000-memory.dmp

Filesize
160KB

Download
memory/868-84-0x00000000049B0000-0x00000000049D8000-memory.dmp

Filesize
160KB

Download
memory/868-31-0x0000000073A70000-0x0000000074220000-memory.dmp

Filesize
7.7MB

Download
memory/868-29-0x00000000049B0000-0x00000000049DE000-memory.dmp

Filesize
184KB

Download
memory/868-32-0x0000000073A70000-0x0000000074220000-memory.dmp

Filesize
7.7MB

Download
memory/868-28-0x0000000004A80000-0x0000000005024000-memory.dmp

Filesize
5.6MB

Download
memory/868-94-0x00000000049B0000-0x00000000049D8000-memory.dmp

Filesize
160KB

Download
memory/868-24-0x00000000024B0000-0x00000000024E0000-memory.dmp

Filesize
192KB

Download
memory/868-25-0x0000000073A70000-0x0000000074220000-memory.dmp

Filesize
7.7MB

Download
memory/868-93-0x00000000049B0000-0x00000000049D8000-memory.dmp

Filesize
160KB

Download
memory/868-86-0x00000000049B0000-0x00000000049D8000-memory.dmp

Filesize
160KB

Download
memory/868-26-0x0000000073A70000-0x0000000074220000-memory.dmp

Filesize
7.7MB

Download
memory/868-90-0x00000000049B0000-0x00000000049D8000-memory.dmp

Filesize
160KB

Download
memory/868-140-0x0000000073A70000-0x0000000074220000-memory.dmp

Filesize
7.7MB

Download
memory/868-88-0x00000000049B0000-0x00000000049D8000-memory.dmp

Filesize
160KB

Download
memory/1820-163-0x0000000004A10000-0x0000000004A76000-memory.dmp

Filesize
408KB

Download
memory/1820-162-0x0000000000160000-0x0000000000182000-memory.dmp

Filesize
136KB

Download
memory/1820-174-0x0000000005CA0000-0x0000000005D32000-memory.dmp

Filesize
584KB

Download
memory/2780-33-0x0000000004A20000-0x0000000004A53000-memory.dmp

Filesize
204KB

Download
memory/2780-56-0x0000000004A20000-0x0000000004A53000-memory.dmp

Filesize
204KB

Download
memory/2780-23-0x0000000002510000-0x000000000254A000-memory.dmp

Filesize
232KB

Download
memory/2780-82-0x0000000004A20000-0x0000000004A53000-memory.dmp

Filesize
204KB

Download
memory/2780-78-0x0000000004A20000-0x0000000004A53000-memory.dmp

Filesize
204KB

Download
memory/2780-76-0x0000000004A20000-0x0000000004A53000-memory.dmp

Filesize
204KB

Download
memory/2780-27-0x0000000073A70000-0x0000000074220000-memory.dmp

Filesize
7.7MB

Download
memory/2780-137-0x0000000073A70000-0x0000000074220000-memory.dmp

Filesize
7.7MB

Download
memory/2780-42-0x0000000004A20000-0x0000000004A53000-memory.dmp

Filesize
204KB

Download
memory/2780-134-0x0000000073A70000-0x0000000074220000-memory.dmp

Filesize
7.7MB

Download
memory/2780-117-0x0000000073A70000-0x0000000074220000-memory.dmp

Filesize
7.7MB

Download
memory/2780-73-0x0000000004A20000-0x0000000004A53000-memory.dmp

Filesize
204KB

Download
memory/2780-70-0x0000000004A20000-0x0000000004A53000-memory.dmp

Filesize
204KB

Download
memory/2780-69-0x0000000004A20000-0x0000000004A53000-memory.dmp

Filesize
204KB

Download
memory/2780-66-0x0000000004A20000-0x0000000004A53000-memory.dmp

Filesize
204KB

Download
memory/2780-64-0x0000000004A20000-0x0000000004A53000-memory.dmp

Filesize
204KB

Download
memory/2780-58-0x0000000004A20000-0x0000000004A53000-memory.dmp

Filesize
204KB

Download
memory/2780-80-0x0000000004A20000-0x0000000004A53000-memory.dmp

Filesize
204KB

Download
memory/2780-54-0x0000000004A20000-0x0000000004A53000-memory.dmp

Filesize
204KB

Download
memory/2780-52-0x0000000004A20000-0x0000000004A53000-memory.dmp

Filesize
204KB

Download
memory/2780-50-0x0000000004A20000-0x0000000004A53000-memory.dmp

Filesize
204KB

Download
memory/2780-48-0x0000000004A20000-0x0000000004A53000-memory.dmp

Filesize
204KB

Download
memory/2780-46-0x0000000004A20000-0x0000000004A53000-memory.dmp

Filesize
204KB

Download
memory/2780-44-0x0000000004A20000-0x0000000004A53000-memory.dmp

Filesize
204KB

Download
memory/2780-161-0x0000000073A70000-0x0000000074220000-memory.dmp

Filesize
7.7MB

Download
memory/2780-40-0x0000000004A20000-0x0000000004A53000-memory.dmp

Filesize
204KB

Download
memory/2780-38-0x0000000004A20000-0x0000000004A53000-memory.dmp

Filesize
204KB

Download
memory/2780-36-0x0000000004A20000-0x0000000004A53000-memory.dmp

Filesize
204KB

Download
memory/2780-34-0x0000000004A20000-0x0000000004A53000-memory.dmp

Filesize
204KB

Download
memory/2780-30-0x0000000004A20000-0x0000000004A5A000-memory.dmp

Filesize
232KB

Download
memory/2780-62-0x0000000004A20000-0x0000000004A53000-memory.dmp

Filesize
204KB

Download
memory/2780-60-0x0000000004A20000-0x0000000004A53000-memory.dmp

Filesize
204KB

Download
memory/2780-22-0x0000000073A7E000-0x0000000073A7F000-memory.dmp

Filesize
4KB

Download
memory/2780-74-0x0000000004A20000-0x0000000004A53000-memory.dmp

Filesize
204KB

Download