oski | fae525089f850763e561a756f8378667c9ed081493ba9871847c83e0013a292d

General

Target

a2c723046a2c17a707b9637692fffb71.exe
Size

879KB
MD5

a2c723046a2c17a707b9637692fffb71
SHA1

a6f9221de5a668581363fa8169bb7b1c138e33cb
SHA256

fae525089f850763e561a756f8378667c9ed081493ba9871847c83e0013a292d
SHA512

20caec409291ec011fb6b62101031ec05eb1a4f57486753ba406dcefb8ec6a32e5655e1d95cc48a27317a18627fbf5fd8fbc22daa2d61923444c3041c11b825a

Score

10^/10

oski infostealer

Malware Config

Extracted

Family

oski

C2

masterwork.me

Signatures

Oski
Oski is an infostealer targeting browser data, crypto wallets.
infostealer 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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2783062828-828903012-4218294845-1000\Control Panel\International\Geo\Nation	a2c723046a2c17a707b9637692fffb71.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 840 set thread context of 4912	840	a2c723046a2c17a707b9637692fffb71.exe	82

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
4268	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
840	a2c723046a2c17a707b9637692fffb71.exe
840	a2c723046a2c17a707b9637692fffb71.exe
4848	powershell.exe
840	a2c723046a2c17a707b9637692fffb71.exe
4848	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	840	a2c723046a2c17a707b9637692fffb71.exe
Token: SeDebugPrivilege	4848	powershell.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 840 wrote to memory of 4848	840	a2c723046a2c17a707b9637692fffb71.exe	78
PID 840 wrote to memory of 4848	840	a2c723046a2c17a707b9637692fffb71.exe	78
PID 840 wrote to memory of 4848	840	a2c723046a2c17a707b9637692fffb71.exe	78
PID 840 wrote to memory of 4268	840	a2c723046a2c17a707b9637692fffb71.exe	80
PID 840 wrote to memory of 4268	840	a2c723046a2c17a707b9637692fffb71.exe	80
PID 840 wrote to memory of 4268	840	a2c723046a2c17a707b9637692fffb71.exe	80
PID 840 wrote to memory of 4912	840	a2c723046a2c17a707b9637692fffb71.exe	82
PID 840 wrote to memory of 4912	840	a2c723046a2c17a707b9637692fffb71.exe	82
PID 840 wrote to memory of 4912	840	a2c723046a2c17a707b9637692fffb71.exe	82
PID 840 wrote to memory of 4912	840	a2c723046a2c17a707b9637692fffb71.exe	82
PID 840 wrote to memory of 4912	840	a2c723046a2c17a707b9637692fffb71.exe	82
PID 840 wrote to memory of 4912	840	a2c723046a2c17a707b9637692fffb71.exe	82
PID 840 wrote to memory of 4912	840	a2c723046a2c17a707b9637692fffb71.exe	82
PID 840 wrote to memory of 4912	840	a2c723046a2c17a707b9637692fffb71.exe	82
PID 840 wrote to memory of 4912	840	a2c723046a2c17a707b9637692fffb71.exe	82

C:\Users\Admin\AppData\Local\Temp\a2c723046a2c17a707b9637692fffb71.exe
"C:\Users\Admin\AppData\Local\Temp\a2c723046a2c17a707b9637692fffb71.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:840
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\UFpvpuHQeW.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4848
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\UFpvpuHQeW" /XML "C:\Users\Admin\AppData\Local\Temp\tmp30D4.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:4268
- C:\Users\Admin\AppData\Local\Temp\a2c723046a2c17a707b9637692fffb71.exe
  "C:\Users\Admin\AppData\Local\Temp\a2c723046a2c17a707b9637692fffb71.exe"
  2⤵
  PID:4912

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp30D4.tmp

Filesize
1KB

MD5
f96a9cedcaf9c3971995ce64ab7fc6cf

SHA1
8872a6b149cb56dc1b343fc9c2d6e27e8fc220c4

SHA256
64c222071cc4676a53d51260081d9317c535e1fc2e8cc1894eb194ffa0b0334b

SHA512
47e37b3e2e6907fefd1d27600ead825ecce1c53ba7dd48de819b5aaa165a5d12ab52731397b77d2344d2e8c138b83922e537e5d7a82dd455bb4242cc3d036457

Download Submit
memory/840-131-0x0000000005510000-0x0000000005AB4000-memory.dmp

Filesize
5.6MB

Download
memory/840-132-0x0000000005040000-0x00000000050D2000-memory.dmp

Filesize
584KB

Download
memory/840-133-0x0000000005020000-0x000000000502A000-memory.dmp

Filesize
40KB

Download
memory/840-134-0x00000000074F0000-0x000000000758C000-memory.dmp

Filesize
624KB

Download
memory/840-135-0x000000000B720000-0x000000000B786000-memory.dmp

Filesize
408KB

Download
memory/840-130-0x0000000000590000-0x0000000000672000-memory.dmp

Filesize
904KB

Download
memory/4848-145-0x00000000056C0000-0x0000000005726000-memory.dmp

Filesize
408KB

Download
memory/4848-149-0x0000000006BA0000-0x0000000006BD2000-memory.dmp

Filesize
200KB

Download
memory/4848-140-0x0000000005890000-0x0000000005EB8000-memory.dmp

Filesize
6.2MB

Download
memory/4848-158-0x0000000007C10000-0x0000000007C18000-memory.dmp

Filesize
32KB

Download
memory/4848-143-0x0000000005620000-0x0000000005642000-memory.dmp

Filesize
136KB

Download
memory/4848-157-0x0000000007C30000-0x0000000007C4A000-memory.dmp

Filesize
104KB

Download
memory/4848-156-0x0000000007B20000-0x0000000007B2E000-memory.dmp

Filesize
56KB

Download
memory/4848-155-0x0000000007B70000-0x0000000007C06000-memory.dmp

Filesize
600KB

Download
memory/4848-154-0x0000000007960000-0x000000000796A000-memory.dmp

Filesize
40KB

Download
memory/4848-148-0x00000000065E0000-0x00000000065FE000-memory.dmp

Filesize
120KB

Download
memory/4848-138-0x0000000002CA0000-0x0000000002CD6000-memory.dmp

Filesize
216KB

Download
memory/4848-150-0x0000000070CD0000-0x0000000070D1C000-memory.dmp

Filesize
304KB

Download
memory/4848-151-0x0000000006B80000-0x0000000006B9E000-memory.dmp

Filesize
120KB

Download
memory/4848-152-0x0000000007F50000-0x00000000085CA000-memory.dmp

Filesize
6.5MB

Download
memory/4848-153-0x00000000078F0000-0x000000000790A000-memory.dmp

Filesize
104KB

Download
memory/4912-147-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4912-146-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4912-144-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4912-142-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads