oski | 8b0ac881b039733c573ab30cf037e0ce3d6f2981c0eb2342902b91ecf891adff

General

Target

SKBM-120821.exe
Size

732KB
MD5

807a927252237ee6436724cbbcd05fa0
SHA1

2344ad154e7d098704278cd5e28fccd29a9dec15
SHA256

a03b45dabcaf812402454befd876b2eafbdf9e967f3bb01e66f33f3cabbdebd5
SHA512

7f0bba03bd838900569e63bdab43e7caa3a1ab2d6744fcb9c38e7ca8914fcf31323b3db5d1ed2efdef1b5b5326f980c8712faef53ca6966c42318b20fd4bd541
SSDEEP

12288:SPqqPtYaerpyXOSs1vJhzl7txF3gSEyI32u6Yaer:wMrpW6vfl7hpE7mmr

Score

10^/10

oski discovery infostealer spyware stealer

Malware Config

Extracted

Family

oski

C2

zau.divendesign.in

Signatures

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

SKBM-120821.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	SKBM-120821.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:

SKBM-120821.exe

description	pid	Process	procid_target
PID 2700 set thread context of 1504	2700	SKBM-120821.exe	101

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
516	1504	WerFault.exe	101

System Location Discovery: System Language Discovery 1 TTPs 3 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:

SKBM-120821.exeschtasks.exeSKBM-120821.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	SKBM-120821.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	SKBM-120821.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
4392	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

SKBM-120821.exe

pid	Process
2700	SKBM-120821.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

SKBM-120821.exe

description	pid	Process
Token: SeDebugPrivilege	2700	SKBM-120821.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

SKBM-120821.exe

description	pid	Process	procid_target
PID 2700 wrote to memory of 4392	2700	SKBM-120821.exe	99
PID 2700 wrote to memory of 4392	2700	SKBM-120821.exe	99
PID 2700 wrote to memory of 4392	2700	SKBM-120821.exe	99
PID 2700 wrote to memory of 1504	2700	SKBM-120821.exe	101
PID 2700 wrote to memory of 1504	2700	SKBM-120821.exe	101
PID 2700 wrote to memory of 1504	2700	SKBM-120821.exe	101
PID 2700 wrote to memory of 1504	2700	SKBM-120821.exe	101
PID 2700 wrote to memory of 1504	2700	SKBM-120821.exe	101
PID 2700 wrote to memory of 1504	2700	SKBM-120821.exe	101
PID 2700 wrote to memory of 1504	2700	SKBM-120821.exe	101
PID 2700 wrote to memory of 1504	2700	SKBM-120821.exe	101
PID 2700 wrote to memory of 1504	2700	SKBM-120821.exe	101

C:\Users\Admin\AppData\Local\Temp\SKBM-120821.exe
"C:\Users\Admin\AppData\Local\Temp\SKBM-120821.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2700
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\rFmqUFUNsPfqc" /XML "C:\Users\Admin\AppData\Local\Temp\tmp7FA.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:4392
- C:\Users\Admin\AppData\Local\Temp\SKBM-120821.exe
  "{path}"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1504
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1504 -s 1328
    3⤵
    - Program crash
    PID:516

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 1504 -ip 1504
1⤵
PID:2244

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\tmp7FA.tmp

Filesize
1KB

MD5
5570235f4229a460596fb8522d0adce5

SHA1
ab78fe5341aa53352db310512b484bdfaeb634da

SHA256
9e6b61ad05d6dba0d9b04227b1b0d8e2487c071f3ac3bf077f6f42c8a730df5e

SHA512
122930eff6b89a1f168e1080fa1f31377124246cc3299d23de5746c04734b0b34ba76ac7c7e604a78cf5d2cd2e332f98df45ebf399c94d7c9e70d6e316f49be0

Download Submit
memory/1504-22-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1504-19-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1504-17-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1504-15-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1504-13-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1504-14-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2700-4-0x0000000004D90000-0x0000000004E2C000-memory.dmp

Filesize
624KB

Download
memory/2700-8-0x0000000005610000-0x0000000005692000-memory.dmp

Filesize
520KB

Download
memory/2700-9-0x00000000052C0000-0x00000000052FC000-memory.dmp

Filesize
240KB

Download
memory/2700-7-0x0000000075180000-0x0000000075930000-memory.dmp

Filesize
7.7MB

Download
memory/2700-6-0x000000007518E000-0x000000007518F000-memory.dmp

Filesize
4KB

Download
memory/2700-5-0x0000000004E30000-0x0000000004EC2000-memory.dmp

Filesize
584KB

Download
memory/2700-0-0x000000007518E000-0x000000007518F000-memory.dmp

Filesize
4KB

Download
memory/2700-3-0x0000000004CE0000-0x0000000004CE8000-memory.dmp

Filesize
32KB

Download
memory/2700-18-0x0000000075180000-0x0000000075930000-memory.dmp

Filesize
7.7MB

Download
memory/2700-2-0x0000000075180000-0x0000000075930000-memory.dmp

Filesize
7.7MB

Download
memory/2700-1-0x0000000000160000-0x000000000021C000-memory.dmp

Filesize
752KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads