strrat | 7c79a4eed33e40230de0b79cef9fc5425916aea40ae610b234720f609f50b764

General

Target

Prosba-o-oferte.jar
Size

41KB
MD5

b225f83a537673f3053e63db84a30662
SHA1

55ea9f056d46bdd03a78df3e885565ec845a31c1
SHA256

7c79a4eed33e40230de0b79cef9fc5425916aea40ae610b234720f609f50b764
SHA512

f5453270287724b2b2e576feb9745c35dfb3069029b0d28a69e9415e6b40f55bf7e91cff0f42217c6024d7d0e8e8d20dc47cfa9d08c4182a2406c13378aef523
SSDEEP

768:3/AKKv6LboyiFV9jKJ6K71Ifu+Lh+FP+6I3zY103e0NhyDEj:YJvIaV9LqCush+FPKs10ufDE

Score

10^/10

strrat discovery persistence stealer trojan

Malware Config

Signatures

STRRAT
STRRAT is a remote access tool than can steal credentials and log keystrokes.
trojan stealer strrat

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Prosba-o-oferte.jar	java.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3864	icacls.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-983155329-280873152-1838004294-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Prosba-o-oferte = "\"C:\\Program Files\\Java\\jre-1.8\\bin\\javaw.exe\" -jar \"C:\\Users\\Admin\\AppData\\Roaming\\Prosba-o-oferte.jar\""	java.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Prosba-o-oferte = "\"C:\\Program Files\\Java\\jre-1.8\\bin\\javaw.exe\" -jar \"C:\\Users\\Admin\\AppData\\Roaming\\Prosba-o-oferte.jar\""	java.exe

Drops file in Program Files directory 12 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\Java\jre-1.8\bin\symbols\dll\ntdll.pdb	java.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\server\jvm.pdb	java.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\server\dll\jvm.pdb	java.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\server\symbols\dll\jvm.pdb	java.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\dll\jvm.pdb	java.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\ntdll.pdb	java.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\dll\ntdll.pdb	java.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\jvm.pdb	java.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\symbols\dll\jvm.pdb	java.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\server\ntdll.pdb	java.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\server\dll\ntdll.pdb	java.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\server\symbols\dll\ntdll.pdb	java.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/Job

T1053

pid	Process
4596	schtasks.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeManageVolumePrivilege	1732	svchost.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1404 wrote to memory of 3864	1404	java.exe	88
PID 1404 wrote to memory of 3864	1404	java.exe	88
PID 1404 wrote to memory of 2124	1404	java.exe	93
PID 1404 wrote to memory of 2124	1404	java.exe	93
PID 1404 wrote to memory of 2832	1404	java.exe	95
PID 1404 wrote to memory of 2832	1404	java.exe	95
PID 2124 wrote to memory of 4596	2124	cmd.exe	97
PID 2124 wrote to memory of 4596	2124	cmd.exe	97

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Program Files (x86)\Common Files\Oracle\Java\javapath\java.exe
java -jar C:\Users\Admin\AppData\Local\Temp\Prosba-o-oferte.jar
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1404
- C:\Windows\system32\icacls.exe
  C:\Windows\system32\icacls.exe C:\ProgramData\Oracle\Java\.oracle_jre_usage /grant "everyone":(OI)(CI)M
  2⤵
  - Modifies file permissions
  PID:3864
- C:\Windows\SYSTEM32\cmd.exe
  cmd /c schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\Prosba-o-oferte.jar"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2124
- - C:\Windows\system32\schtasks.exe
    schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\Prosba-o-oferte.jar"
    3⤵
    - Creates scheduled task(s)
    PID:4596
- C:\Program Files\Java\jre-1.8\bin\java.exe
  "C:\Program Files\Java\jre-1.8\bin\java.exe" -jar "C:\Users\Admin\AppData\Roaming\Prosba-o-oferte.jar"
  2⤵
  - Drops file in Program Files directory
  PID:2832

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:1764

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" "C:\Windows\SYSTEM32\EDGEHTML.dll",#141 Microsoft.VCLibs.140.00_8wekyb3d8bbwe
1⤵
PID:3968

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k UnistackSvcGroup
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1732

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Defense Evasion

File and Directory Permissions Modification

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\Microsoft\Windows\Start Menu\Programs\StartUp\Prosba-o-oferte.jar

Filesize
41KB

MD5
b225f83a537673f3053e63db84a30662

SHA1
55ea9f056d46bdd03a78df3e885565ec845a31c1

SHA256
7c79a4eed33e40230de0b79cef9fc5425916aea40ae610b234720f609f50b764

SHA512
f5453270287724b2b2e576feb9745c35dfb3069029b0d28a69e9415e6b40f55bf7e91cff0f42217c6024d7d0e8e8d20dc47cfa9d08c4182a2406c13378aef523

Download Submit
C:\ProgramData\Oracle\Java\.oracle_jre_usage\3903daac9bc4a3b7.timestamp

Filesize
46B

MD5
3ecd4d8a163c98f5a96d148e9719dbc1

SHA1
dd399fadbcaa4c3dada8956a034094b3df47edfa

SHA256
a6452368f3c433909f677c0dcd9fd2d4b5a7591ea0b54511dde697cc1754fd88

SHA512
6b722d9c244362f93ba8fbccef1cd6c7f67a03fc13d1e320806503a528a8a585912066216ecb530f9979ab03e65882d83ff08712290588fb179ecf7513845e8a

Download Submit
memory/1404-39-0x00000183D0F30000-0x00000183D1F30000-memory.dmp

Filesize
16.0MB

Download
memory/1404-35-0x00000183D11F0000-0x00000183D1200000-memory.dmp

Filesize
64KB

Download
memory/1404-29-0x00000183D0F30000-0x00000183D1F30000-memory.dmp

Filesize
16.0MB

Download
memory/1404-12-0x00000183D0F10000-0x00000183D0F11000-memory.dmp

Filesize
4KB

Download
memory/1404-31-0x00000183D11B0000-0x00000183D11C0000-memory.dmp

Filesize
64KB

Download
memory/1404-32-0x00000183D1210000-0x00000183D1220000-memory.dmp

Filesize
64KB

Download
memory/1404-33-0x00000183D11D0000-0x00000183D11E0000-memory.dmp

Filesize
64KB

Download
memory/1404-58-0x00000183D0F30000-0x00000183D1F30000-memory.dmp

Filesize
16.0MB

Download
memory/1404-34-0x00000183D11E0000-0x00000183D11F0000-memory.dmp

Filesize
64KB

Download
memory/1404-36-0x00000183D1200000-0x00000183D1210000-memory.dmp

Filesize
64KB

Download
memory/1404-16-0x00000183D0F30000-0x00000183D1F30000-memory.dmp

Filesize
16.0MB

Download
memory/1404-4-0x00000183D0F30000-0x00000183D1F30000-memory.dmp

Filesize
16.0MB

Download
memory/1732-60-0x0000026B9A790000-0x0000026B9A7A0000-memory.dmp

Filesize
64KB

Download
memory/1732-76-0x0000026B9A890000-0x0000026B9A8A0000-memory.dmp

Filesize
64KB

Download
memory/1732-92-0x0000026BA2C00000-0x0000026BA2C01000-memory.dmp

Filesize
4KB

Download
memory/1732-94-0x0000026BA2C30000-0x0000026BA2C31000-memory.dmp

Filesize
4KB

Download
memory/1732-95-0x0000026BA2C30000-0x0000026BA2C31000-memory.dmp

Filesize
4KB

Download
memory/1732-96-0x0000026BA2D40000-0x0000026BA2D41000-memory.dmp

Filesize
4KB

Download
memory/2832-43-0x000002B62F3E0000-0x000002B6303E0000-memory.dmp

Filesize
16.0MB

Download
memory/2832-56-0x000002B62F3E0000-0x000002B6303E0000-memory.dmp

Filesize
16.0MB

Download
memory/2832-57-0x000002B62F660000-0x000002B62F670000-memory.dmp

Filesize
64KB

Download
memory/2832-50-0x000002B62DBD0000-0x000002B62DBD1000-memory.dmp

Filesize
4KB

Download
memory/2832-59-0x000002B62F3E0000-0x000002B6303E0000-memory.dmp

Filesize
16.0MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads