oski | a375d88a6666e7101b4f582ea0239033e4716e883ecb301245011e9c58054a9c

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
25-03-2024 11:12

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General

Target

ddde6fc0ce346b0ab7bb0c8c02a09d33.exe
Size

1.2MB
MD5

ddde6fc0ce346b0ab7bb0c8c02a09d33
SHA1

1067652f21fd05902288613746b5e2ea79bd07f9
SHA256

a375d88a6666e7101b4f582ea0239033e4716e883ecb301245011e9c58054a9c
SHA512

66a92b7f14371069d78876add097fb8f847755eff95edd846939566f0ce219b686f265c8a57dbe6e19e5f12145bfbfcccff09371413a758005d1aee7d8490c49
SSDEEP

12288:PYhxa6BTGO/NkJWZeZQCmdjVv6LZRsXdmSLem2Vg4miT9UJESs6IcWByCcRQUBqh:PYv5CmHAIOsBgo0q4wMPnpx2XP4iO1H

Score

10^/10

oski infostealer spyware stealer

Malware Config

Extracted

Family

oski

fine.le-pearl.com

Signatures

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

CustAttr .NET packer 1 IoCs

Detects CustAttr .NET packer in memory.

Processes:

resource	yara_rule
behavioral2/memory/4556-8-0x0000000005190000-0x00000000051A2000-memory.dmp	CustAttr

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:

ddde6fc0ce346b0ab7bb0c8c02a09d33.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\Control Panel\International\Geo\Nation	ddde6fc0ce346b0ab7bb0c8c02a09d33.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

Suspicious use of SetThreadContext 1 IoCs

Processes:

ddde6fc0ce346b0ab7bb0c8c02a09d33.exe

description	pid	Process	procid_target
PID 4556 set thread context of 4436	4556	ddde6fc0ce346b0ab7bb0c8c02a09d33.exe	118

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
3680	4436	WerFault.exe	118

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/Job

T1053

Processes:

schtasks.exe

pid	Process
1576	schtasks.exe

Suspicious behavior: EnumeratesProcesses 13 IoCs

Processes:

powershell.exepowershell.exeddde6fc0ce346b0ab7bb0c8c02a09d33.exepowershell.exe

pid	Process
3580	powershell.exe
3580	powershell.exe
4560	powershell.exe
4560	powershell.exe
4556	ddde6fc0ce346b0ab7bb0c8c02a09d33.exe
4556	ddde6fc0ce346b0ab7bb0c8c02a09d33.exe
4556	ddde6fc0ce346b0ab7bb0c8c02a09d33.exe
4556	ddde6fc0ce346b0ab7bb0c8c02a09d33.exe
3580	powershell.exe
4560	powershell.exe
2208	powershell.exe
2208	powershell.exe
2208	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

powershell.exepowershell.exeddde6fc0ce346b0ab7bb0c8c02a09d33.exepowershell.exe

description	pid	Process
Token: SeDebugPrivilege	4560	powershell.exe
Token: SeDebugPrivilege	3580	powershell.exe
Token: SeDebugPrivilege	4556	ddde6fc0ce346b0ab7bb0c8c02a09d33.exe
Token: SeDebugPrivilege	2208	powershell.exe

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

ddde6fc0ce346b0ab7bb0c8c02a09d33.exe

description	pid	Process	procid_target
PID 4556 wrote to memory of 4560	4556	ddde6fc0ce346b0ab7bb0c8c02a09d33.exe	109
PID 4556 wrote to memory of 4560	4556	ddde6fc0ce346b0ab7bb0c8c02a09d33.exe	109
PID 4556 wrote to memory of 4560	4556	ddde6fc0ce346b0ab7bb0c8c02a09d33.exe	109
PID 4556 wrote to memory of 3580	4556	ddde6fc0ce346b0ab7bb0c8c02a09d33.exe	111
PID 4556 wrote to memory of 3580	4556	ddde6fc0ce346b0ab7bb0c8c02a09d33.exe	111
PID 4556 wrote to memory of 3580	4556	ddde6fc0ce346b0ab7bb0c8c02a09d33.exe	111
PID 4556 wrote to memory of 1576	4556	ddde6fc0ce346b0ab7bb0c8c02a09d33.exe	113
PID 4556 wrote to memory of 1576	4556	ddde6fc0ce346b0ab7bb0c8c02a09d33.exe	113
PID 4556 wrote to memory of 1576	4556	ddde6fc0ce346b0ab7bb0c8c02a09d33.exe	113
PID 4556 wrote to memory of 2208	4556	ddde6fc0ce346b0ab7bb0c8c02a09d33.exe	115
PID 4556 wrote to memory of 2208	4556	ddde6fc0ce346b0ab7bb0c8c02a09d33.exe	115
PID 4556 wrote to memory of 2208	4556	ddde6fc0ce346b0ab7bb0c8c02a09d33.exe	115
PID 4556 wrote to memory of 3884	4556	ddde6fc0ce346b0ab7bb0c8c02a09d33.exe	116
PID 4556 wrote to memory of 3884	4556	ddde6fc0ce346b0ab7bb0c8c02a09d33.exe	116
PID 4556 wrote to memory of 3884	4556	ddde6fc0ce346b0ab7bb0c8c02a09d33.exe	116
PID 4556 wrote to memory of 4436	4556	ddde6fc0ce346b0ab7bb0c8c02a09d33.exe	118
PID 4556 wrote to memory of 4436	4556	ddde6fc0ce346b0ab7bb0c8c02a09d33.exe	118
PID 4556 wrote to memory of 4436	4556	ddde6fc0ce346b0ab7bb0c8c02a09d33.exe	118
PID 4556 wrote to memory of 4436	4556	ddde6fc0ce346b0ab7bb0c8c02a09d33.exe	118
PID 4556 wrote to memory of 4436	4556	ddde6fc0ce346b0ab7bb0c8c02a09d33.exe	118
PID 4556 wrote to memory of 4436	4556	ddde6fc0ce346b0ab7bb0c8c02a09d33.exe	118
PID 4556 wrote to memory of 4436	4556	ddde6fc0ce346b0ab7bb0c8c02a09d33.exe	118
PID 4556 wrote to memory of 4436	4556	ddde6fc0ce346b0ab7bb0c8c02a09d33.exe	118
PID 4556 wrote to memory of 4436	4556	ddde6fc0ce346b0ab7bb0c8c02a09d33.exe	118

C:\Users\Admin\AppData\Local\Temp\ddde6fc0ce346b0ab7bb0c8c02a09d33.exe
"C:\Users\Admin\AppData\Local\Temp\ddde6fc0ce346b0ab7bb0c8c02a09d33.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4556
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\ddde6fc0ce346b0ab7bb0c8c02a09d33.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4560
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\nllJKmehpTGztY.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3580
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\nllJKmehpTGztY" /XML "C:\Users\Admin\AppData\Local\Temp\tmp1E8F.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1576
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\nllJKmehpTGztY.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2208
- C:\Users\Admin\AppData\Local\Temp\ddde6fc0ce346b0ab7bb0c8c02a09d33.exe
  "C:\Users\Admin\AppData\Local\Temp\ddde6fc0ce346b0ab7bb0c8c02a09d33.exe"
  2⤵
  PID:3884
- C:\Users\Admin\AppData\Local\Temp\ddde6fc0ce346b0ab7bb0c8c02a09d33.exe
  "C:\Users\Admin\AppData\Local\Temp\ddde6fc0ce346b0ab7bb0c8c02a09d33.exe"
  2⤵
  PID:4436
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4436 -s 1336
    3⤵
    - Program crash
    PID:3680

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 4436 -ip 4436
1⤵
PID:924

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
968cb9309758126772781b83adb8a28f

SHA1
8da30e71accf186b2ba11da1797cf67f8f78b47c

SHA256
92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

SHA512
4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\7U91ICFQ\suspendedpage[1].htm

Filesize
496B

MD5
1842eed13fddc700a50adada08a0f84d

SHA1
5e7b6997ffaf89afdb803de2e9231cd8886621ae

SHA256
47ac9eef48022403111f9cef6871af594079acdd88da83e7d2b2a92fa47f7368

SHA512
0d0086367e60782f81324abc5a79ae4c19aaa96aeb7aead23d4ca2dde0af5cc7cf3cc9b6e391b95405ed97a136fcd99af3f868a6027b89b5fcc47cff52272b1d

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
18KB

MD5
721b820033e6be3ed62b05a7ffd1058a

SHA1
1cd6d6aca172b0a0d6457210e05d69bd218610b0

SHA256
b9bf40384b5619156fc5badb3977814011ceaccbad6a0e3aec12b3c2d1985230

SHA512
a0fddf321cfe133e130fd0dd7d97d9d47be4cd21b763a743ac88215867fdf90dbf24b3bcd7fd57fae29c9dec2ad4b88943de3bdef3d98ce148025e24e1b09135

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
18KB

MD5
370503c005a86f4b61be37ed837a3346

SHA1
3e33736877a414a90be5b3d856dc0d33c6a5d047

SHA256
160e98d8c70faf9077c614cae50a4471a8d35038dd60290281819215dc8e6abe

SHA512
dd41da42955df6402c194deb16ad7ff47d3c269312dee521290f462326e61e5f871a776a2b50fdbc5fc7a0a22dcb237e19814f8a1e3b417a336d220343613e88

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_dgwo411t.twj.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp1E8F.tmp

Filesize
1KB

MD5
ded0848aceaf3811b35e713ff0a596bf

SHA1
be18af623feb080b05aa7b7ba3a593b95c3f3841

SHA256
04b17f2598e68cb413414546a9886d965b9fbdcbad5745d601a78bc7e9bc717b

SHA512
bc333cdc192b7d60be790654dcc2753e39626de84f5035700f50268f551b298a9674b59f4aaf7e48de38c8202258dbb2cd35a5d279d24fe7d0827e645823e48e

Download Submit
memory/2208-140-0x0000000075070000-0x0000000075820000-memory.dmp

Filesize
7.7MB

Download
memory/2208-129-0x0000000007A00000-0x0000000007A1A000-memory.dmp

Filesize
104KB

Download
memory/2208-127-0x00000000078F0000-0x00000000078FE000-memory.dmp

Filesize
56KB

Download
memory/2208-98-0x000000007F040000-0x000000007F050000-memory.dmp

Filesize
64KB

Download
memory/2208-101-0x000000006FBE0000-0x000000006FC2C000-memory.dmp

Filesize
304KB

Download
memory/2208-58-0x0000000002AE0000-0x0000000002AF0000-memory.dmp

Filesize
64KB

Download
memory/2208-57-0x0000000002AE0000-0x0000000002AF0000-memory.dmp

Filesize
64KB

Download
memory/2208-56-0x0000000075070000-0x0000000075820000-memory.dmp

Filesize
7.7MB

Download
memory/3580-19-0x00000000052C0000-0x00000000058E8000-memory.dmp

Filesize
6.2MB

Download
memory/3580-120-0x0000000007670000-0x0000000007706000-memory.dmp

Filesize
600KB

Download
memory/3580-139-0x0000000075070000-0x0000000075820000-memory.dmp

Filesize
7.7MB

Download
memory/3580-21-0x0000000075070000-0x0000000075820000-memory.dmp

Filesize
7.7MB

Download
memory/3580-130-0x0000000007710000-0x0000000007718000-memory.dmp

Filesize
32KB

Download
memory/3580-23-0x0000000002820000-0x0000000002830000-memory.dmp

Filesize
64KB

Download
memory/3580-25-0x0000000002820000-0x0000000002830000-memory.dmp

Filesize
64KB

Download
memory/3580-24-0x00000000051C0000-0x0000000005226000-memory.dmp

Filesize
408KB

Download
memory/3580-128-0x0000000007630000-0x0000000007644000-memory.dmp

Filesize
80KB

Download
memory/3580-115-0x0000000007460000-0x000000000746A000-memory.dmp

Filesize
40KB

Download
memory/3580-100-0x00000000073F0000-0x000000000740A000-memory.dmp

Filesize
104KB

Download
memory/3580-26-0x0000000005AA0000-0x0000000005B06000-memory.dmp

Filesize
408KB

Download
memory/3580-99-0x0000000007A30000-0x00000000080AA000-memory.dmp

Filesize
6.5MB

Download
memory/3580-95-0x00000000072F0000-0x0000000007393000-memory.dmp

Filesize
652KB

Download
memory/3580-83-0x0000000007070000-0x000000000708E000-memory.dmp

Filesize
120KB

Download
memory/3580-72-0x000000006FBE0000-0x000000006FC2C000-memory.dmp

Filesize
304KB

Download
memory/3580-70-0x000000007FDA0000-0x000000007FDB0000-memory.dmp

Filesize
64KB

Download
memory/3580-71-0x00000000070B0000-0x00000000070E2000-memory.dmp

Filesize
200KB

Download
memory/3580-55-0x0000000006600000-0x000000000664C000-memory.dmp

Filesize
304KB

Download
memory/3580-53-0x00000000060C0000-0x00000000060DE000-memory.dmp

Filesize
120KB

Download
memory/3580-68-0x0000000002820000-0x0000000002830000-memory.dmp

Filesize
64KB

Download
memory/4436-52-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4436-48-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4436-141-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4436-49-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4436-50-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4556-54-0x0000000075070000-0x0000000075820000-memory.dmp

Filesize
7.7MB

Download
memory/4556-9-0x0000000075070000-0x0000000075820000-memory.dmp

Filesize
7.7MB

Download
memory/4556-11-0x0000000007320000-0x00000000073A2000-memory.dmp

Filesize
520KB

Download
memory/4556-12-0x0000000006D60000-0x0000000006D9A000-memory.dmp

Filesize
232KB

Download
memory/4556-10-0x0000000005AE0000-0x0000000005AF0000-memory.dmp

Filesize
64KB

Download
memory/4556-1-0x0000000075070000-0x0000000075820000-memory.dmp

Filesize
7.7MB

Download
memory/4556-2-0x0000000005730000-0x00000000057CC000-memory.dmp

Filesize
624KB

Download
memory/4556-5-0x0000000005AE0000-0x0000000005AF0000-memory.dmp

Filesize
64KB

Download
memory/4556-8-0x0000000005190000-0x00000000051A2000-memory.dmp

Filesize
72KB

Download
memory/4556-7-0x0000000005AF0000-0x0000000005B46000-memory.dmp

Filesize
344KB

Download
memory/4556-3-0x0000000005D80000-0x0000000006324000-memory.dmp

Filesize
5.6MB

Download
memory/4556-0-0x0000000000C50000-0x0000000000D94000-memory.dmp

Filesize
1.3MB

Download
memory/4556-4-0x0000000005870000-0x0000000005902000-memory.dmp

Filesize
584KB

Download
memory/4556-6-0x0000000005830000-0x000000000583A000-memory.dmp

Filesize
40KB

Download
memory/4560-73-0x000000006FBE0000-0x000000006FC2C000-memory.dmp

Filesize
304KB

Download
memory/4560-27-0x00000000030E0000-0x00000000030F0000-memory.dmp

Filesize
64KB

Download
memory/4560-22-0x0000000005A30000-0x0000000005A52000-memory.dmp

Filesize
136KB

Download
memory/4560-136-0x0000000075070000-0x0000000075820000-memory.dmp

Filesize
7.7MB

Download
memory/4560-18-0x0000000075070000-0x0000000075820000-memory.dmp

Filesize
7.7MB

Download
memory/4560-123-0x0000000007E50000-0x0000000007E61000-memory.dmp

Filesize
68KB

Download
memory/4560-28-0x00000000030E0000-0x00000000030F0000-memory.dmp

Filesize
64KB

Download
memory/4560-17-0x0000000003010000-0x0000000003046000-memory.dmp

Filesize
216KB

Download
memory/4560-47-0x0000000006320000-0x0000000006674000-memory.dmp

Filesize
3.3MB

Download
memory/4560-69-0x00000000030E0000-0x00000000030F0000-memory.dmp

Filesize
64KB

Download