oski | 2b3f661e6165b5a63130acb2509821a895f0eee94e7af31fdd6abd32db3ab687

General

Target

Proforma adjunta Nº 42037,pdf.exe
Size

34KB
MD5

f7565a4825eb92f2859114bb5a08b60d
SHA1

83d47736d04939e1c01b3df7720109c6d5ca9f78
SHA256

2b3f661e6165b5a63130acb2509821a895f0eee94e7af31fdd6abd32db3ab687
SHA512

2ad41ac31f5349ca16bd6112663a7ca6dc4a9e77562ca12458a54337a779ffbb9b7b91a710cabd37944b001001fede4c803cd40e47e78393b13a162c9cf78ac4

Score

10^/10

oski snakekeylogger discovery infostealer keylogger spyware stealer

Malware Config

Extracted

Family

oski

C2

203.159.80.72

Extracted

Family

snakekeylogger

C2

https://api.telegram.org/bot1761516426:AAE3Juu_v6fG9Gy1S33LdTvyz85ua-duZsk/sendMessage?chat_id=1727399585

Signatures

Oski
Oski is an infostealer targeting browser data, crypto wallets.
infostealer oski
Snake Keylogger
Keylogger and Infostealer first seen in November 2020.
stealer keylogger snakekeylogger

Snake Keylogger Payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2264-135-0x0000000000400000-0x000000000046A000-memory.dmp	family_snakekeylogger
behavioral2/memory/2264-136-0x000000000046446E-mapping.dmp	family_snakekeylogger

Downloads MZ/PE file
Executes dropped EXE 2 IoCs

Processes:

999276325331.exe999276325331.exe

pid process

3920 999276325331.exe
2264 999276325331.exe
Loads dropped DLL 3 IoCs

Processes:

Proforma adjunta Nº 42037,pdf.exe

pid process

404 Proforma adjunta Nº 42037,pdf.exe
404 Proforma adjunta Nº 42037,pdf.exe
404 Proforma adjunta Nº 42037,pdf.exe
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
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
T1081
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

23 checkip.dyndns.org
26 freegeoip.app
27 freegeoip.app

pid	process
3920	999276325331.exe
2264	999276325331.exe

pid	process
404	Proforma adjunta Nº 42037,pdf.exe
404	Proforma adjunta Nº 42037,pdf.exe
404	Proforma adjunta Nº 42037,pdf.exe

flow	ioc
23	checkip.dyndns.org
26	freegeoip.app
27	freegeoip.app

Suspicious use of SetThreadContext 2 IoCs

Processes:

Proforma adjunta Nº 42037,pdf.exe999276325331.exe

description	pid	process	target process
PID 636 set thread context of 404	636	Proforma adjunta Nº 42037,pdf.exe	Proforma adjunta Nº 42037,pdf.exe
PID 3920 set thread context of 2264	3920	999276325331.exe	999276325331.exe

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

System Information Discovery
T1082

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:

Proforma adjunta Nº 42037,pdf.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	Proforma adjunta Nº 42037,pdf.exe

Kills process with taskkill 1 IoCs
evasion

Processes:

taskkill.exe

pid process

1776 taskkill.exe
NTFS ADS 1 IoCs

Processes:

Proforma adjunta Nº 42037,pdf.exe

description ioc process

File created C:\ProgramData\999276325331.exe:Zone.Identifier Proforma adjunta Nº 42037,pdf.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

999276325331.exe

pid process

2264 999276325331.exe

pid	process
1776	taskkill.exe

description	ioc	process
File created	C:\ProgramData\999276325331.exe:Zone.Identifier	Proforma adjunta Nº 42037,pdf.exe

pid	process
2264	999276325331.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

Proforma adjunta Nº 42037,pdf.exe999276325331.exe999276325331.exetaskkill.exe

description	pid	process
Token: SeDebugPrivilege	636	Proforma adjunta Nº 42037,pdf.exe
Token: SeDebugPrivilege	3920	999276325331.exe
Token: SeDebugPrivilege	2264	999276325331.exe
Token: SeDebugPrivilege	1776	taskkill.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

Proforma adjunta Nº 42037,pdf.exeProforma adjunta Nº 42037,pdf.exe999276325331.execmd.exe

description	pid	process	target process
PID 636 wrote to memory of 404	636	Proforma adjunta Nº 42037,pdf.exe	Proforma adjunta Nº 42037,pdf.exe
PID 636 wrote to memory of 404	636	Proforma adjunta Nº 42037,pdf.exe	Proforma adjunta Nº 42037,pdf.exe
PID 636 wrote to memory of 404	636	Proforma adjunta Nº 42037,pdf.exe	Proforma adjunta Nº 42037,pdf.exe
PID 636 wrote to memory of 404	636	Proforma adjunta Nº 42037,pdf.exe	Proforma adjunta Nº 42037,pdf.exe
PID 636 wrote to memory of 404	636	Proforma adjunta Nº 42037,pdf.exe	Proforma adjunta Nº 42037,pdf.exe
PID 636 wrote to memory of 404	636	Proforma adjunta Nº 42037,pdf.exe	Proforma adjunta Nº 42037,pdf.exe
PID 636 wrote to memory of 404	636	Proforma adjunta Nº 42037,pdf.exe	Proforma adjunta Nº 42037,pdf.exe
PID 636 wrote to memory of 404	636	Proforma adjunta Nº 42037,pdf.exe	Proforma adjunta Nº 42037,pdf.exe
PID 636 wrote to memory of 404	636	Proforma adjunta Nº 42037,pdf.exe	Proforma adjunta Nº 42037,pdf.exe
PID 404 wrote to memory of 3920	404	Proforma adjunta Nº 42037,pdf.exe	999276325331.exe
PID 404 wrote to memory of 3920	404	Proforma adjunta Nº 42037,pdf.exe	999276325331.exe
PID 404 wrote to memory of 3920	404	Proforma adjunta Nº 42037,pdf.exe	999276325331.exe
PID 3920 wrote to memory of 2264	3920	999276325331.exe	999276325331.exe
PID 3920 wrote to memory of 2264	3920	999276325331.exe	999276325331.exe
PID 3920 wrote to memory of 2264	3920	999276325331.exe	999276325331.exe
PID 3920 wrote to memory of 2264	3920	999276325331.exe	999276325331.exe
PID 3920 wrote to memory of 2264	3920	999276325331.exe	999276325331.exe
PID 3920 wrote to memory of 2264	3920	999276325331.exe	999276325331.exe
PID 3920 wrote to memory of 2264	3920	999276325331.exe	999276325331.exe
PID 3920 wrote to memory of 2264	3920	999276325331.exe	999276325331.exe
PID 404 wrote to memory of 3940	404	Proforma adjunta Nº 42037,pdf.exe	cmd.exe
PID 404 wrote to memory of 3940	404	Proforma adjunta Nº 42037,pdf.exe	cmd.exe
PID 404 wrote to memory of 3940	404	Proforma adjunta Nº 42037,pdf.exe	cmd.exe
PID 3940 wrote to memory of 1776	3940	cmd.exe	taskkill.exe
PID 3940 wrote to memory of 1776	3940	cmd.exe	taskkill.exe
PID 3940 wrote to memory of 1776	3940	cmd.exe	taskkill.exe

C:\Users\Admin\AppData\Local\Temp\Proforma adjunta Nº 42037,pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Proforma adjunta Nº 42037,pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:636

C:\Users\Admin\AppData\Local\Temp\Proforma adjunta Nº 42037,pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Proforma adjunta Nº 42037,pdf.exe"
2⤵
- Loads dropped DLL
- Checks processor information in registry
- NTFS ADS
- Suspicious use of WriteProcessMemory
PID:404

C:\ProgramData\999276325331.exe
"C:\ProgramData\999276325331.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3920

C:\ProgramData\999276325331.exe
"C:\ProgramData\999276325331.exe"
4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2264

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c taskkill /pid 404 & erase C:\Users\Admin\AppData\Local\Temp\Proforma adjunta Nº 42037,pdf.exe & RD /S /Q C:\\ProgramData\\210542698599807\\* & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:3940

C:\Windows\SysWOW64\taskkill.exe
taskkill /pid 404
4⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:1776

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

4

T1081

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

4

T1005

Exfiltration

Command and Control

Impact

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Downloads

C:\ProgramData\999276325331.exe
MD5
4f32642f936b50ba29756943849e5933

SHA1
0e832a5216e56000ef6c3a72035b884a0787a8f6

SHA256
c9201fcb3e6cb7d75e3c09f2c6de4e42144bf8c43e11be23f9c004f9eb8b02eb

SHA512
28d93f7e3ba3b07323ef570901d6f768835fc20205f2918bc1d0072ebfa51040d2a3cad776a305040efbbedfcb893e394791b880a61e2a29c8366b2f618349e8

Download Submit
C:\ProgramData\999276325331.exe
MD5
4f32642f936b50ba29756943849e5933

SHA1
0e832a5216e56000ef6c3a72035b884a0787a8f6

SHA256
c9201fcb3e6cb7d75e3c09f2c6de4e42144bf8c43e11be23f9c004f9eb8b02eb

SHA512
28d93f7e3ba3b07323ef570901d6f768835fc20205f2918bc1d0072ebfa51040d2a3cad776a305040efbbedfcb893e394791b880a61e2a29c8366b2f618349e8

Download Submit
C:\ProgramData\999276325331.exe
MD5
4f32642f936b50ba29756943849e5933

SHA1
0e832a5216e56000ef6c3a72035b884a0787a8f6

SHA256
c9201fcb3e6cb7d75e3c09f2c6de4e42144bf8c43e11be23f9c004f9eb8b02eb

SHA512
28d93f7e3ba3b07323ef570901d6f768835fc20205f2918bc1d0072ebfa51040d2a3cad776a305040efbbedfcb893e394791b880a61e2a29c8366b2f618349e8

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\999276325331.exe.log
MD5
bca5d9d288a7809c63f2d594cb7c7b94

SHA1
11689c8a592cd8706f0155b4574488dd872cbd97

SHA256
d7a3ed9b26c989e840532a7f0fa21bc508f8fbcb2d37116fade84280f2a865ed

SHA512
db30f307e6818573f06f115818476104abfce94f15d9ad11e8163aa3cc19cee4cc3c87c98ef45d5c978b6f166089cc0283e3cc9a5db8359a425c8da7039dae0d

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCookies\DBMPVQV9.cookie
MD5
695c6ea0817cb7fbf1ccb1a181213ce1

SHA1
2ff49a12016916c20185e0c6c51aa45231d29932

SHA256
708c726ce44f1e3922a37eae03d0e687932dde43d6de0da7cb6772a846e88af4

SHA512
82eeeb8b26ab8dfccfed23c6ad1484836dcf840e512c3b60a4f3e52296776d54196be0d7b545c554dd2b77c3480ac7952f0af6e159a0b7f64626131b70a98d0f

Download Submit
\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/404-121-0x000000000040717B-mapping.dmp

Download
memory/404-120-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/404-122-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/636-118-0x00000000052A0000-0x00000000052C1000-memory.dmp

Filesize
132KB

Download
memory/636-117-0x0000000005220000-0x000000000571E000-memory.dmp

Filesize
5.0MB

Download
memory/636-116-0x0000000005720000-0x0000000005721000-memory.dmp

Filesize
4KB

Download
memory/636-119-0x0000000006300000-0x0000000006301000-memory.dmp

Filesize
4KB

Download
memory/636-114-0x0000000000A30000-0x0000000000A31000-memory.dmp

Filesize
4KB

Download
memory/1776-144-0x0000000000000000-mapping.dmp

Download
memory/2264-136-0x000000000046446E-mapping.dmp

Download
memory/2264-135-0x0000000000400000-0x000000000046A000-memory.dmp

Filesize
424KB

Download
memory/2264-145-0x0000000005710000-0x0000000005C0E000-memory.dmp

Filesize
5.0MB

Download
memory/2264-147-0x00000000069A0000-0x00000000069A1000-memory.dmp

Filesize
4KB

Download
memory/2264-148-0x0000000006B70000-0x0000000006B71000-memory.dmp

Filesize
4KB

Download
memory/2264-149-0x0000000006910000-0x0000000006911000-memory.dmp

Filesize
4KB

Download
memory/3920-126-0x0000000000000000-mapping.dmp

Download
memory/3920-132-0x0000000004B80000-0x000000000507E000-memory.dmp

Filesize
5.0MB

Download
memory/3920-129-0x00000000003B0000-0x00000000003B1000-memory.dmp

Filesize
4KB

Download
memory/3940-141-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads