oski | cd238eae8acd5aaece92a1c264437fedea2fd7088df8353d81cdfd6af037e69b

General

Target

SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe
Size

743KB
MD5

6bc672d5f96b14084c561a217731c5a4
SHA1

7ff84c9fe7594826d2c8689279979bdc75f0b561
SHA256

cd238eae8acd5aaece92a1c264437fedea2fd7088df8353d81cdfd6af037e69b
SHA512

6c06111139ff6f35ceb302cb7f0d1e960134d1a46fee4fe2727310a416b36c35e6c10372cbdd5107b01af833d3e3f3ec5bf0186a7fdd62b02e9d86ea2184fd7a

Score

10^/10

oski infostealer spyware suricata

Malware Config

Extracted

Family

oski

C2

unitech.co.vu

Signatures

Oski
Oski is an infostealer targeting browser data, crypto wallets.
infostealer oski
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)
suricata
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt) M2
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt) M2
suricata
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (passwords.txt) M2
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (passwords.txt) M2
suricata
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil
suricata
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer HTTP POST Pattern
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer HTTP POST Pattern
suricata
Downloads MZ/PE file

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation	SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe

Loads dropped DLL 3 IoCs

pid	Process
4136	MSBuild.exe
4136	MSBuild.exe
4136	MSBuild.exe

Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4800 set thread context of 4136	4800	SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe	91

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

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	MSBuild.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

pid	Process
1996	schtasks.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
3700	taskkill.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
4800	SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4800	SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe
Token: SeDebugPrivilege	3700	taskkill.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 4800 wrote to memory of 1996	4800	SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe	89
PID 4800 wrote to memory of 1996	4800	SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe	89
PID 4800 wrote to memory of 1996	4800	SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe	89
PID 4800 wrote to memory of 4136	4800	SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe	91
PID 4800 wrote to memory of 4136	4800	SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe	91
PID 4800 wrote to memory of 4136	4800	SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe	91
PID 4800 wrote to memory of 4136	4800	SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe	91
PID 4800 wrote to memory of 4136	4800	SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe	91
PID 4800 wrote to memory of 4136	4800	SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe	91
PID 4800 wrote to memory of 4136	4800	SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe	91
PID 4800 wrote to memory of 4136	4800	SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe	91
PID 4800 wrote to memory of 4136	4800	SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe	91
PID 4136 wrote to memory of 5100	4136	MSBuild.exe	92
PID 4136 wrote to memory of 5100	4136	MSBuild.exe	92
PID 4136 wrote to memory of 5100	4136	MSBuild.exe	92
PID 5100 wrote to memory of 3700	5100	cmd.exe	94
PID 5100 wrote to memory of 3700	5100	cmd.exe	94
PID 5100 wrote to memory of 3700	5100	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe
"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4800
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\XukguFq" /XML "C:\Users\Admin\AppData\Local\Temp\tmp3FD8.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1996
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "{path}"
  2⤵
  - Loads dropped DLL
  - Checks processor information in registry
  - Suspicious use of WriteProcessMemory
  PID:4136
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c taskkill /pid 4136 & erase C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe & RD /S /Q C:\\ProgramData\\297878529330161\\* & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:5100
  - - C:\Windows\SysWOW64\taskkill.exe
      taskkill /pid 4136
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:3700

Network

MITRE ATT&CK Enterprise 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

Query Registry

2

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\mozglue.dll

Filesize
133KB

MD5
8f73c08a9660691143661bf7332c3c27

SHA1
37fa65dd737c50fda710fdbde89e51374d0c204a

SHA256
3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

SHA512
0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

Download Submit
C:\ProgramData\nss3.dll

Filesize
1.2MB

MD5
bfac4e3c5908856ba17d41edcd455a51

SHA1
8eec7e888767aa9e4cca8ff246eb2aacb9170428

SHA256
e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

SHA512
2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

Download Submit
C:\ProgramData\sqlite3.dll

Filesize
630KB

MD5
e477a96c8f2b18d6b5c27bde49c990bf

SHA1
e980c9bf41330d1e5bd04556db4646a0210f7409

SHA256
16574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660

SHA512
335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c

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C:\Users\Admin\AppData\Local\Temp\tmp3FD8.tmp

Filesize
1KB

MD5
fde9093a45da1f2ca09bdcd5a5dd0e11

SHA1
ddc3c16a4df825916b43260b90ef3979a4f92495

SHA256
d705ff2de80d8c6fa3f4de160345531e541e6b1bb12cdb695234b99786878f1f

SHA512
65cef3d4e0f6f49d3fa1103151e8357f40c8a243e7408c512a8f3f66a8b27815c264d3e8df967040b6553668f313dce18ebc7b0f93d41a5711b45b4d51c0203c

Download Submit
memory/4136-138-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4136-139-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4136-140-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4136-141-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4136-146-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4800-130-0x0000000000D70000-0x0000000000E30000-memory.dmp

Filesize
768KB

Download
memory/4800-134-0x00000000057B0000-0x00000000057BA000-memory.dmp

Filesize
40KB

Download
memory/4800-133-0x0000000005970000-0x0000000005A0C000-memory.dmp

Filesize
624KB

Download
memory/4800-132-0x0000000005830000-0x00000000058C2000-memory.dmp

Filesize
584KB

Download
memory/4800-131-0x0000000005DE0000-0x0000000006384000-memory.dmp

Filesize
5.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads