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

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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2736 set thread context of 2492	2736	SKBM-120821.exe	32

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
536	2492	WerFault.exe	32

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

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

pid	Process
2412	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2736	SKBM-120821.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2736	SKBM-120821.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2736 wrote to memory of 2412	2736	SKBM-120821.exe	30
PID 2736 wrote to memory of 2412	2736	SKBM-120821.exe	30
PID 2736 wrote to memory of 2412	2736	SKBM-120821.exe	30
PID 2736 wrote to memory of 2412	2736	SKBM-120821.exe	30
PID 2736 wrote to memory of 2492	2736	SKBM-120821.exe	32
PID 2736 wrote to memory of 2492	2736	SKBM-120821.exe	32
PID 2736 wrote to memory of 2492	2736	SKBM-120821.exe	32
PID 2736 wrote to memory of 2492	2736	SKBM-120821.exe	32
PID 2736 wrote to memory of 2492	2736	SKBM-120821.exe	32
PID 2736 wrote to memory of 2492	2736	SKBM-120821.exe	32
PID 2736 wrote to memory of 2492	2736	SKBM-120821.exe	32
PID 2736 wrote to memory of 2492	2736	SKBM-120821.exe	32
PID 2736 wrote to memory of 2492	2736	SKBM-120821.exe	32
PID 2736 wrote to memory of 2492	2736	SKBM-120821.exe	32
PID 2492 wrote to memory of 536	2492	SKBM-120821.exe	33
PID 2492 wrote to memory of 536	2492	SKBM-120821.exe	33
PID 2492 wrote to memory of 536	2492	SKBM-120821.exe	33
PID 2492 wrote to memory of 536	2492	SKBM-120821.exe	33

C:\Users\Admin\AppData\Local\Temp\SKBM-120821.exe
"C:\Users\Admin\AppData\Local\Temp\SKBM-120821.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2736
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\rFmqUFUNsPfqc" /XML "C:\Users\Admin\AppData\Local\Temp\tmpDAD5.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2412
- C:\Users\Admin\AppData\Local\Temp\SKBM-120821.exe
  "{path}"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2492
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2492 -s 112
    3⤵
    - Program crash
    PID:536

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

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpDAD5.tmp

Filesize
1KB

MD5
4fa0957fe479ec906cb12f1be356af07

SHA1
196eabaad288eba17b05ba4fd51ac91bdd26f2a3

SHA256
f7f951cdf85f9082b81f6a095a3154491d39a5e828a1d88603d7c2e95d80d16e

SHA512
1257fd9aa82cd5e813a41bf94d8d6069585ed2af36ba3ae318f0ddbc630ca1b5107d21207e95ba88f16ba9170bd3cca3811d84e6e5c73baf82fc1b3bb35b86e6

Download Submit
memory/2492-16-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2492-13-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2492-21-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2492-14-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2492-17-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2492-15-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2492-11-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2492-19-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2736-2-0x00000000741C0000-0x00000000748AE000-memory.dmp

Filesize
6.9MB

Download
memory/2736-1-0x0000000000A40000-0x0000000000AFC000-memory.dmp

Filesize
752KB

Download
memory/2736-7-0x0000000000520000-0x000000000055C000-memory.dmp

Filesize
240KB

Download
memory/2736-0-0x00000000741CE000-0x00000000741CF000-memory.dmp

Filesize
4KB

Download
memory/2736-6-0x0000000005790000-0x0000000005812000-memory.dmp

Filesize
520KB

Download
memory/2736-5-0x00000000741C0000-0x00000000748AE000-memory.dmp

Filesize
6.9MB

Download
memory/2736-4-0x00000000741CE000-0x00000000741CF000-memory.dmp

Filesize
4KB

Download
memory/2736-3-0x00000000003D0000-0x00000000003D8000-memory.dmp

Filesize
32KB

Download
memory/2736-22-0x00000000741C0000-0x00000000748AE000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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