oski | edb5b2e40ba1596106785ac718cbb576310e3c05674a5db31189f4a1dc753677

General

Target

9a4b975c_by_Libranalysis.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 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1304-137-0x0000000000400000-0x000000000046A000-memory.dmp	family_snakekeylogger
behavioral2/memory/1304-138-0x000000000046446E-mapping.dmp	family_snakekeylogger

Downloads MZ/PE file
Executes dropped EXE 2 IoCs

Processes:

612903315069.exe612903315069.exe

pid process

2976 612903315069.exe
1304 612903315069.exe
Loads dropped DLL 3 IoCs

Processes:

9a4b975c_by_Libranalysis.exe

pid process

2688 9a4b975c_by_Libranalysis.exe
2688 9a4b975c_by_Libranalysis.exe
2688 9a4b975c_by_Libranalysis.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

32 checkip.dyndns.org
35 freegeoip.app
36 freegeoip.app

pid	process
2976	612903315069.exe
1304	612903315069.exe

pid	process
2688	9a4b975c_by_Libranalysis.exe
2688	9a4b975c_by_Libranalysis.exe
2688	9a4b975c_by_Libranalysis.exe

flow	ioc
32	checkip.dyndns.org
35	freegeoip.app
36	freegeoip.app

Suspicious use of SetThreadContext 2 IoCs

Processes:

9a4b975c_by_Libranalysis.exe612903315069.exe

description	pid	process	target process
PID 4044 set thread context of 2688	4044	9a4b975c_by_Libranalysis.exe	9a4b975c_by_Libranalysis.exe
PID 2976 set thread context of 1304	2976	612903315069.exe	612903315069.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:

9a4b975c_by_Libranalysis.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	9a4b975c_by_Libranalysis.exe

Kills process with taskkill 1 IoCs
evasion

Processes:

taskkill.exe

pid process

3400 taskkill.exe
NTFS ADS 1 IoCs

Processes:

9a4b975c_by_Libranalysis.exe

description ioc process

File created C:\ProgramData\612903315069.exe:Zone.Identifier 9a4b975c_by_Libranalysis.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

612903315069.exe

pid process

1304 612903315069.exe

pid	process
3400	taskkill.exe

description	ioc	process
File created	C:\ProgramData\612903315069.exe:Zone.Identifier	9a4b975c_by_Libranalysis.exe

pid	process
1304	612903315069.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

9a4b975c_by_Libranalysis.exe612903315069.exe612903315069.exetaskkill.exe

description	pid	process
Token: SeDebugPrivilege	4044	9a4b975c_by_Libranalysis.exe
Token: SeDebugPrivilege	2976	612903315069.exe
Token: SeDebugPrivilege	1304	612903315069.exe
Token: SeDebugPrivilege	3400	taskkill.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

9a4b975c_by_Libranalysis.exe9a4b975c_by_Libranalysis.exe612903315069.execmd.exe

description	pid	process	target process
PID 4044 wrote to memory of 2688	4044	9a4b975c_by_Libranalysis.exe	9a4b975c_by_Libranalysis.exe
PID 4044 wrote to memory of 2688	4044	9a4b975c_by_Libranalysis.exe	9a4b975c_by_Libranalysis.exe
PID 4044 wrote to memory of 2688	4044	9a4b975c_by_Libranalysis.exe	9a4b975c_by_Libranalysis.exe
PID 4044 wrote to memory of 2688	4044	9a4b975c_by_Libranalysis.exe	9a4b975c_by_Libranalysis.exe
PID 4044 wrote to memory of 2688	4044	9a4b975c_by_Libranalysis.exe	9a4b975c_by_Libranalysis.exe
PID 4044 wrote to memory of 2688	4044	9a4b975c_by_Libranalysis.exe	9a4b975c_by_Libranalysis.exe
PID 4044 wrote to memory of 2688	4044	9a4b975c_by_Libranalysis.exe	9a4b975c_by_Libranalysis.exe
PID 4044 wrote to memory of 2688	4044	9a4b975c_by_Libranalysis.exe	9a4b975c_by_Libranalysis.exe
PID 4044 wrote to memory of 2688	4044	9a4b975c_by_Libranalysis.exe	9a4b975c_by_Libranalysis.exe
PID 2688 wrote to memory of 2976	2688	9a4b975c_by_Libranalysis.exe	612903315069.exe
PID 2688 wrote to memory of 2976	2688	9a4b975c_by_Libranalysis.exe	612903315069.exe
PID 2688 wrote to memory of 2976	2688	9a4b975c_by_Libranalysis.exe	612903315069.exe
PID 2688 wrote to memory of 1044	2688	9a4b975c_by_Libranalysis.exe	cmd.exe
PID 2688 wrote to memory of 1044	2688	9a4b975c_by_Libranalysis.exe	cmd.exe
PID 2688 wrote to memory of 1044	2688	9a4b975c_by_Libranalysis.exe	cmd.exe
PID 2976 wrote to memory of 1304	2976	612903315069.exe	612903315069.exe
PID 2976 wrote to memory of 1304	2976	612903315069.exe	612903315069.exe
PID 2976 wrote to memory of 1304	2976	612903315069.exe	612903315069.exe
PID 2976 wrote to memory of 1304	2976	612903315069.exe	612903315069.exe
PID 2976 wrote to memory of 1304	2976	612903315069.exe	612903315069.exe
PID 2976 wrote to memory of 1304	2976	612903315069.exe	612903315069.exe
PID 2976 wrote to memory of 1304	2976	612903315069.exe	612903315069.exe
PID 2976 wrote to memory of 1304	2976	612903315069.exe	612903315069.exe
PID 1044 wrote to memory of 3400	1044	cmd.exe	taskkill.exe
PID 1044 wrote to memory of 3400	1044	cmd.exe	taskkill.exe
PID 1044 wrote to memory of 3400	1044	cmd.exe	taskkill.exe

C:\Users\Admin\AppData\Local\Temp\9a4b975c_by_Libranalysis.exe
"C:\Users\Admin\AppData\Local\Temp\9a4b975c_by_Libranalysis.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4044

C:\Users\Admin\AppData\Local\Temp\9a4b975c_by_Libranalysis.exe
"C:\Users\Admin\AppData\Local\Temp\9a4b975c_by_Libranalysis.exe"
2⤵
- Loads dropped DLL
- Checks processor information in registry
- NTFS ADS
- Suspicious use of WriteProcessMemory
PID:2688

C:\ProgramData\612903315069.exe
"C:\ProgramData\612903315069.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2976

C:\ProgramData\612903315069.exe
"C:\ProgramData\612903315069.exe"
4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1304

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c taskkill /pid 2688 & erase C:\Users\Admin\AppData\Local\Temp\9a4b975c_by_Libranalysis.exe & RD /S /Q C:\\ProgramData\\531786271301241\\* & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:1044

C:\Windows\SysWOW64\taskkill.exe
taskkill /pid 2688
4⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:3400

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

Replay Monitor

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Downloads

C:\ProgramData\612903315069.exe
MD5
d7a28e461fc2dde6e3a65bf17231e897

SHA1
e7d84a5953d63ff63d9fd30c5225710e72de014c

SHA256
3c93f92ea751655e9f14691c73373699b57b33fe1d6c4e052a76bacd6b63b17c

SHA512
722cc5ce33bd832b05db885635a0fbf9714faf079672db633346882738203db332eccfae70bc3cb6b4799fd2d738a50c5891f5adeefc8c746b3033b842c01a40

Download Submit
C:\ProgramData\612903315069.exe
MD5
d7a28e461fc2dde6e3a65bf17231e897

SHA1
e7d84a5953d63ff63d9fd30c5225710e72de014c

SHA256
3c93f92ea751655e9f14691c73373699b57b33fe1d6c4e052a76bacd6b63b17c

SHA512
722cc5ce33bd832b05db885635a0fbf9714faf079672db633346882738203db332eccfae70bc3cb6b4799fd2d738a50c5891f5adeefc8c746b3033b842c01a40

Download Submit
C:\ProgramData\612903315069.exe
MD5
d7a28e461fc2dde6e3a65bf17231e897

SHA1
e7d84a5953d63ff63d9fd30c5225710e72de014c

SHA256
3c93f92ea751655e9f14691c73373699b57b33fe1d6c4e052a76bacd6b63b17c

SHA512
722cc5ce33bd832b05db885635a0fbf9714faf079672db633346882738203db332eccfae70bc3cb6b4799fd2d738a50c5891f5adeefc8c746b3033b842c01a40

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\612903315069.exe.log
MD5
e776d12f66c8237f097d3a2a4b14fa05

SHA1
17bbccbc2664e914be908a17bb1e38592a93aeeb

SHA256
61e9db0b42a8ccb157635966af374769fbfd40bfe4430d42aeaaed5c50ae71d5

SHA512
97b1c5bdf6d011e79c66fa67e278c6e7eeec1fad47ac273ccde7733e2e07e2509bc43b60d97356199fa2a523d31e98ae4372544368d86b6fccd7783243c8cc53

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCookies\25963D6Z.cookie
MD5
3b9ff5469364a3780a2d70c2f656c4a1

SHA1
ff0a34c184490a9c1b81e2f5a4b1f24fb7ee5907

SHA256
50a596c0753c2c766a98e0b4d61abcbde5f7e81f16e8eb513408d4f098ec45c7

SHA512
d65f5a1f2fb4669179c86d8219947613f30b11f8a3b4247581c621daa8264978093cf0f94717175487ca32bef360a15fc64a1312360ff2677cc2c6eadb326fd3

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/1044-135-0x0000000000000000-mapping.dmp

Download
memory/1304-151-0x0000000006720000-0x0000000006721000-memory.dmp

Filesize
4KB

Download
memory/1304-149-0x0000000006480000-0x0000000006481000-memory.dmp

Filesize
4KB

Download
memory/1304-147-0x0000000005190000-0x000000000568E000-memory.dmp

Filesize
5.0MB

Download
memory/1304-138-0x000000000046446E-mapping.dmp

Download
memory/1304-137-0x0000000000400000-0x000000000046A000-memory.dmp

Filesize
424KB

Download
memory/2688-121-0x000000000040717B-mapping.dmp

Download
memory/2688-123-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2688-120-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2976-127-0x0000000000000000-mapping.dmp

Download
memory/2976-146-0x00000000058F0000-0x0000000005DEE000-memory.dmp

Filesize
5.0MB

Download
memory/2976-130-0x0000000000FA0000-0x0000000000FA1000-memory.dmp

Filesize
4KB

Download
memory/3400-144-0x0000000000000000-mapping.dmp

Download
memory/4044-118-0x0000000002900000-0x0000000002921000-memory.dmp

Filesize
132KB

Download
memory/4044-119-0x0000000005FE0000-0x0000000005FE1000-memory.dmp

Filesize
4KB

Download
memory/4044-114-0x0000000000680000-0x0000000000681000-memory.dmp

Filesize
4KB

Download
memory/4044-117-0x00000000054F0000-0x00000000054F1000-memory.dmp

Filesize
4KB

Download
memory/4044-122-0x0000000004FF0000-0x00000000054EE000-memory.dmp

Filesize
5.0MB

Download
memory/4044-116-0x0000000004F50000-0x0000000004F51000-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