oski | edb5b2e40ba1596106785ac718cbb576310e3c05674a5db31189f4a1dc753677

General

Target

15be16213deac30838b2850d866bdf5382402e2d.exe
Size

33KB
MD5

9a4b975c10dfc590337ee6d960aa4a02
SHA1

15be16213deac30838b2850d866bdf5382402e2d
SHA256

edb5b2e40ba1596106785ac718cbb576310e3c05674a5db31189f4a1dc753677
SHA512

d3bdfc2d3a9d06050ac1f6e38b7bb842033d6658e61be891ba6581d0d9a735bc9f72ac341a0531efa8e68dfa29f205dfd7785c9d330641cbc493f7c790f4bcfb

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 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4048-136-0x0000000000400000-0x000000000046A000-memory.dmp	family_snakekeylogger
behavioral2/memory/4048-137-0x000000000046446E-mapping.dmp	family_snakekeylogger
behavioral2/memory/4048-146-0x0000000005890000-0x0000000005D8E000-memory.dmp	family_snakekeylogger

Downloads MZ/PE file
Executes dropped EXE 2 IoCs

Processes:

907957047250.exe907957047250.exe

pid process

2076 907957047250.exe
4048 907957047250.exe

pid	process
2076	907957047250.exe
4048	907957047250.exe

Loads dropped DLL 3 IoCs

Processes:

15be16213deac30838b2850d866bdf5382402e2d.exe

pid	process
3912	15be16213deac30838b2850d866bdf5382402e2d.exe
3912	15be16213deac30838b2850d866bdf5382402e2d.exe
3912	15be16213deac30838b2850d866bdf5382402e2d.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

18 checkip.dyndns.org
21 freegeoip.app
22 freegeoip.app

flow	ioc
18	checkip.dyndns.org
21	freegeoip.app
22	freegeoip.app

Suspicious use of SetThreadContext 2 IoCs

Processes:

15be16213deac30838b2850d866bdf5382402e2d.exe907957047250.exe

description	pid	process	target process
PID 644 set thread context of 3912	644	15be16213deac30838b2850d866bdf5382402e2d.exe	15be16213deac30838b2850d866bdf5382402e2d.exe
PID 2076 set thread context of 4048	2076	907957047250.exe	907957047250.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:

15be16213deac30838b2850d866bdf5382402e2d.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	15be16213deac30838b2850d866bdf5382402e2d.exe

Kills process with taskkill 1 IoCs
evasion

Processes:

taskkill.exe

pid process

3756 taskkill.exe
NTFS ADS 1 IoCs

Processes:

15be16213deac30838b2850d866bdf5382402e2d.exe

description ioc process

File created C:\ProgramData\907957047250.exe:Zone.Identifier 15be16213deac30838b2850d866bdf5382402e2d.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

907957047250.exe

pid process

4048 907957047250.exe

pid	process
3756	taskkill.exe

description	ioc	process
File created	C:\ProgramData\907957047250.exe:Zone.Identifier	15be16213deac30838b2850d866bdf5382402e2d.exe

pid	process
4048	907957047250.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

15be16213deac30838b2850d866bdf5382402e2d.exe907957047250.exe907957047250.exetaskkill.exe

description	pid	process
Token: SeDebugPrivilege	644	15be16213deac30838b2850d866bdf5382402e2d.exe
Token: SeDebugPrivilege	2076	907957047250.exe
Token: SeDebugPrivilege	4048	907957047250.exe
Token: SeDebugPrivilege	3756	taskkill.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

15be16213deac30838b2850d866bdf5382402e2d.exe15be16213deac30838b2850d866bdf5382402e2d.exe907957047250.execmd.exe

description	pid	process	target process
PID 644 wrote to memory of 3912	644	15be16213deac30838b2850d866bdf5382402e2d.exe	15be16213deac30838b2850d866bdf5382402e2d.exe
PID 644 wrote to memory of 3912	644	15be16213deac30838b2850d866bdf5382402e2d.exe	15be16213deac30838b2850d866bdf5382402e2d.exe
PID 644 wrote to memory of 3912	644	15be16213deac30838b2850d866bdf5382402e2d.exe	15be16213deac30838b2850d866bdf5382402e2d.exe
PID 644 wrote to memory of 3912	644	15be16213deac30838b2850d866bdf5382402e2d.exe	15be16213deac30838b2850d866bdf5382402e2d.exe
PID 644 wrote to memory of 3912	644	15be16213deac30838b2850d866bdf5382402e2d.exe	15be16213deac30838b2850d866bdf5382402e2d.exe
PID 644 wrote to memory of 3912	644	15be16213deac30838b2850d866bdf5382402e2d.exe	15be16213deac30838b2850d866bdf5382402e2d.exe
PID 644 wrote to memory of 3912	644	15be16213deac30838b2850d866bdf5382402e2d.exe	15be16213deac30838b2850d866bdf5382402e2d.exe
PID 644 wrote to memory of 3912	644	15be16213deac30838b2850d866bdf5382402e2d.exe	15be16213deac30838b2850d866bdf5382402e2d.exe
PID 644 wrote to memory of 3912	644	15be16213deac30838b2850d866bdf5382402e2d.exe	15be16213deac30838b2850d866bdf5382402e2d.exe
PID 3912 wrote to memory of 2076	3912	15be16213deac30838b2850d866bdf5382402e2d.exe	907957047250.exe
PID 3912 wrote to memory of 2076	3912	15be16213deac30838b2850d866bdf5382402e2d.exe	907957047250.exe
PID 3912 wrote to memory of 2076	3912	15be16213deac30838b2850d866bdf5382402e2d.exe	907957047250.exe
PID 2076 wrote to memory of 4048	2076	907957047250.exe	907957047250.exe
PID 2076 wrote to memory of 4048	2076	907957047250.exe	907957047250.exe
PID 2076 wrote to memory of 4048	2076	907957047250.exe	907957047250.exe
PID 2076 wrote to memory of 4048	2076	907957047250.exe	907957047250.exe
PID 2076 wrote to memory of 4048	2076	907957047250.exe	907957047250.exe
PID 2076 wrote to memory of 4048	2076	907957047250.exe	907957047250.exe
PID 2076 wrote to memory of 4048	2076	907957047250.exe	907957047250.exe
PID 2076 wrote to memory of 4048	2076	907957047250.exe	907957047250.exe
PID 3912 wrote to memory of 3160	3912	15be16213deac30838b2850d866bdf5382402e2d.exe	cmd.exe
PID 3912 wrote to memory of 3160	3912	15be16213deac30838b2850d866bdf5382402e2d.exe	cmd.exe
PID 3912 wrote to memory of 3160	3912	15be16213deac30838b2850d866bdf5382402e2d.exe	cmd.exe
PID 3160 wrote to memory of 3756	3160	cmd.exe	taskkill.exe
PID 3160 wrote to memory of 3756	3160	cmd.exe	taskkill.exe
PID 3160 wrote to memory of 3756	3160	cmd.exe	taskkill.exe

C:\Users\Admin\AppData\Local\Temp\15be16213deac30838b2850d866bdf5382402e2d.exe
"C:\Users\Admin\AppData\Local\Temp\15be16213deac30838b2850d866bdf5382402e2d.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:644

C:\Users\Admin\AppData\Local\Temp\15be16213deac30838b2850d866bdf5382402e2d.exe
"C:\Users\Admin\AppData\Local\Temp\15be16213deac30838b2850d866bdf5382402e2d.exe"
2⤵
- Loads dropped DLL
- Checks processor information in registry
- NTFS ADS
- Suspicious use of WriteProcessMemory
PID:3912

C:\ProgramData\907957047250.exe
"C:\ProgramData\907957047250.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2076

C:\ProgramData\907957047250.exe
"C:\ProgramData\907957047250.exe"
4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4048

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c taskkill /pid 3912 & erase C:\Users\Admin\AppData\Local\Temp\15be16213deac30838b2850d866bdf5382402e2d.exe & RD /S /Q C:\\ProgramData\\508081411076712\\* & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:3160

C:\Windows\SysWOW64\taskkill.exe
taskkill /pid 3912
4⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:3756

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\907957047250.exe
MD5
d7a28e461fc2dde6e3a65bf17231e897

SHA1
e7d84a5953d63ff63d9fd30c5225710e72de014c

SHA256
3c93f92ea751655e9f14691c73373699b57b33fe1d6c4e052a76bacd6b63b17c

SHA512
722cc5ce33bd832b05db885635a0fbf9714faf079672db633346882738203db332eccfae70bc3cb6b4799fd2d738a50c5891f5adeefc8c746b3033b842c01a40

Download Submit
C:\ProgramData\907957047250.exe
MD5
d7a28e461fc2dde6e3a65bf17231e897

SHA1
e7d84a5953d63ff63d9fd30c5225710e72de014c

SHA256
3c93f92ea751655e9f14691c73373699b57b33fe1d6c4e052a76bacd6b63b17c

SHA512
722cc5ce33bd832b05db885635a0fbf9714faf079672db633346882738203db332eccfae70bc3cb6b4799fd2d738a50c5891f5adeefc8c746b3033b842c01a40

Download Submit
C:\ProgramData\907957047250.exe
MD5
d7a28e461fc2dde6e3a65bf17231e897

SHA1
e7d84a5953d63ff63d9fd30c5225710e72de014c

SHA256
3c93f92ea751655e9f14691c73373699b57b33fe1d6c4e052a76bacd6b63b17c

SHA512
722cc5ce33bd832b05db885635a0fbf9714faf079672db633346882738203db332eccfae70bc3cb6b4799fd2d738a50c5891f5adeefc8c746b3033b842c01a40

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCookies\SCCJ7VJT.cookie
MD5
339ce4590e0f339264070b47d11357b4

SHA1
2dc1c5ab1f6e26cb5966eef4b1eaffe557cc68ec

SHA256
1b521944a5b1ffd0d6559672a2952c53938b46268df6a6dd417a556c325f20bf

SHA512
75c9900ba803dd8e839f290f5eef559c6fb5eb628d3b65c27c92746a1b00c727a472ae38dbcb182717991216832c44bb7253cf89d08fbac42ae2da665f48caa2

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/644-114-0x0000000000020000-0x0000000000021000-memory.dmp

Filesize
4KB

Download
memory/644-118-0x00000000049C0000-0x0000000004EBE000-memory.dmp

Filesize
5.0MB

Download
memory/644-117-0x0000000004EC0000-0x0000000004EC1000-memory.dmp

Filesize
4KB

Download
memory/644-120-0x00000000059E0000-0x00000000059E1000-memory.dmp

Filesize
4KB

Download
memory/644-119-0x0000000004840000-0x0000000004861000-memory.dmp

Filesize
132KB

Download
memory/644-116-0x0000000004920000-0x0000000004921000-memory.dmp

Filesize
4KB

Download
memory/2076-127-0x0000000000000000-mapping.dmp

Download
memory/2076-145-0x00000000056B0000-0x0000000005742000-memory.dmp

Filesize
584KB

Download
memory/2076-130-0x0000000000ED0000-0x0000000000ED1000-memory.dmp

Filesize
4KB

Download
memory/3160-141-0x0000000000000000-mapping.dmp

Download
memory/3756-144-0x0000000000000000-mapping.dmp

Download
memory/3912-123-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/3912-121-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/3912-122-0x000000000040717B-mapping.dmp

Download
memory/4048-137-0x000000000046446E-mapping.dmp

Download
memory/4048-136-0x0000000000400000-0x000000000046A000-memory.dmp

Filesize
424KB

Download
memory/4048-150-0x0000000006DC0000-0x0000000006DC1000-memory.dmp

Filesize
4KB

Download
memory/4048-146-0x0000000005890000-0x0000000005D8E000-memory.dmp

Filesize
5.0MB

Download
memory/4048-148-0x0000000006B20000-0x0000000006B21000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads