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-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe

Loads dropped DLL 3 IoCs

pid	Process
4628	MSBuild.exe
4628	MSBuild.exe
4628	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 1372 set thread context of 4628	1372	SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe	92

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
5084	schtasks.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
3860	taskkill.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1372	SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1372	SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe
Token: SeDebugPrivilege	3860	taskkill.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1372 wrote to memory of 5084	1372	SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe	90
PID 1372 wrote to memory of 5084	1372	SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe	90
PID 1372 wrote to memory of 5084	1372	SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe	90
PID 1372 wrote to memory of 4628	1372	SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe	92
PID 1372 wrote to memory of 4628	1372	SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe	92
PID 1372 wrote to memory of 4628	1372	SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe	92
PID 1372 wrote to memory of 4628	1372	SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe	92
PID 1372 wrote to memory of 4628	1372	SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe	92
PID 1372 wrote to memory of 4628	1372	SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe	92
PID 1372 wrote to memory of 4628	1372	SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe	92
PID 1372 wrote to memory of 4628	1372	SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe	92
PID 1372 wrote to memory of 4628	1372	SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe	92
PID 4628 wrote to memory of 3476	4628	MSBuild.exe	93
PID 4628 wrote to memory of 3476	4628	MSBuild.exe	93
PID 4628 wrote to memory of 3476	4628	MSBuild.exe	93
PID 3476 wrote to memory of 3860	3476	cmd.exe	95
PID 3476 wrote to memory of 3860	3476	cmd.exe	95
PID 3476 wrote to memory of 3860	3476	cmd.exe	95

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:1372
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\XukguFq" /XML "C:\Users\Admin\AppData\Local\Temp\tmpD249.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:5084
- 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:4628
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c taskkill /pid 4628 & erase C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe & RD /S /Q C:\\ProgramData\\059434714861759\\* & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3476
  - - C:\Windows\SysWOW64\taskkill.exe
      taskkill /pid 4628
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:3860

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

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpD249.tmp

Filesize
1KB

MD5
6057795a82888eb61b98922601824cc4

SHA1
b478a7f45f8321d7781d355a8143877508787d68

SHA256
7e60fad5192ec7f667549dd506ba70cbc883bc2eb88b5b0fd245dc80928f3bbc

SHA512
ab6e4b67bffd1f7d615cae4863dbd1943721407b251d0fc3b6dc69498fa8741f083dadbda978ec510b5c7b425727aa85503f2d86005dffa43659efb5bf429521

Download Submit
memory/1372-134-0x00000000051B0000-0x00000000051BA000-memory.dmp

Filesize
40KB

Download
memory/1372-133-0x00000000053A0000-0x000000000543C000-memory.dmp

Filesize
624KB

Download
memory/1372-130-0x0000000000780000-0x0000000000840000-memory.dmp

Filesize
768KB

Download
memory/1372-131-0x0000000005810000-0x0000000005DB4000-memory.dmp

Filesize
5.6MB

Download
memory/1372-132-0x0000000005260000-0x00000000052F2000-memory.dmp

Filesize
584KB

Download
memory/4628-138-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4628-141-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4628-140-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4628-139-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4628-146-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads