strrat | 49a493e2214429f51e58f0cb7679736d88e196707d03a6c624de96399974ae97

General

Target

a96bfbf20a599ee5f39d549564bb417ab4033193fcc3576b6c7151d29a90611e.jar
Size

64KB
MD5

b41fe131ce29c70de7b55c400cc1fbcb
SHA1

282bd6da4b9047609a04afaab6d7495354baa30f
SHA256

a96bfbf20a599ee5f39d549564bb417ab4033193fcc3576b6c7151d29a90611e
SHA512

b90ecf59f78fe23ef72422f8da508448248ced7b86afcc43d1428ae2b120f90d10be10986e7d5ac44488ea12143fea9a48523784533e0c38790a1da22bda8e65
SSDEEP

1536:cjgwRZ3jmn6fyKsTHJ7gTtozbVrHyCs3KB:cjVRpVHskyvVrysB

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\a96bfbf20a599ee5f39d549564bb417ab4033193fcc3576b6c7151d29a90611e.jar	java.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4012	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-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\a96bfbf20a599ee5f39d549564bb417ab4033193fcc3576b6c7151d29a90611e = "\"C:\\Program Files\\Java\\jre-1.8\\bin\\javaw.exe\" -jar \"C:\\Users\\Admin\\AppData\\Roaming\\a96bfbf20a599ee5f39d549564bb417ab4033193fcc3576b6c7151d29a90611e.jar\""	java.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\a96bfbf20a599ee5f39d549564bb417ab4033193fcc3576b6c7151d29a90611e = "\"C:\\Program Files\\Java\\jre-1.8\\bin\\javaw.exe\" -jar \"C:\\Users\\Admin\\AppData\\Roaming\\a96bfbf20a599ee5f39d549564bb417ab4033193fcc3576b6c7151d29a90611e.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\server\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\server\symbols\dll\jvm.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\dll\ntdll.pdb	java.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\server\symbols\dll\ntdll.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\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\dll\jvm.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
4420	schtasks.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3156 wrote to memory of 4012	3156	java.exe	100
PID 3156 wrote to memory of 4012	3156	java.exe	100
PID 3156 wrote to memory of 2468	3156	java.exe	102
PID 3156 wrote to memory of 2468	3156	java.exe	102
PID 2468 wrote to memory of 4420	2468	cmd.exe	105
PID 2468 wrote to memory of 4420	2468	cmd.exe	105
PID 3156 wrote to memory of 1156	3156	java.exe	104
PID 3156 wrote to memory of 1156	3156	java.exe	104

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\a96bfbf20a599ee5f39d549564bb417ab4033193fcc3576b6c7151d29a90611e.jar
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:3156
- 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:4012
- C:\Windows\SYSTEM32\cmd.exe
  cmd /c schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\a96bfbf20a599ee5f39d549564bb417ab4033193fcc3576b6c7151d29a90611e.jar"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2468
- - C:\Windows\system32\schtasks.exe
    schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\a96bfbf20a599ee5f39d549564bb417ab4033193fcc3576b6c7151d29a90611e.jar"
    3⤵
    - Creates scheduled task(s)
    PID:4420
- 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\a96bfbf20a599ee5f39d549564bb417ab4033193fcc3576b6c7151d29a90611e.jar"
  2⤵
  - Drops file in Program Files directory
  PID:1156

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3672 --field-trial-handle=2276,i,5697607538120380977,9987005253899555344,262144 --variations-seed-version /prefetch:8
1⤵
PID:3800

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\a96bfbf20a599ee5f39d549564bb417ab4033193fcc3576b6c7151d29a90611e.jar

Filesize
64KB

MD5
b41fe131ce29c70de7b55c400cc1fbcb

SHA1
282bd6da4b9047609a04afaab6d7495354baa30f

SHA256
a96bfbf20a599ee5f39d549564bb417ab4033193fcc3576b6c7151d29a90611e

SHA512
b90ecf59f78fe23ef72422f8da508448248ced7b86afcc43d1428ae2b120f90d10be10986e7d5ac44488ea12143fea9a48523784533e0c38790a1da22bda8e65

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

Filesize
46B

MD5
c479600f87996827bf26b9397710537a

SHA1
af0d6f95adbd598737a83183aeb24b8de802f2d7

SHA256
741b4ea14dcd20a7238ee519df97c36943503356e2a780487777e38957ff8aa9

SHA512
14db8c7525a1c8dba785e94724927dbef215cedce729adeafc58684ef1ab45689d9ab1c724b2d4dc5888ff4d45dbeb390d1d2d72879d5000299477cb66a4d4c9

Download Submit
memory/1156-43-0x000001E202CC0000-0x000001E203CC0000-memory.dmp

Filesize
16.0MB

Download
memory/1156-60-0x000001E202CC0000-0x000001E203CC0000-memory.dmp

Filesize
16.0MB

Download
memory/1156-58-0x000001E202CC0000-0x000001E203CC0000-memory.dmp

Filesize
16.0MB

Download
memory/1156-57-0x000001E202F50000-0x000001E202F60000-memory.dmp

Filesize
64KB

Download
memory/1156-56-0x000001E202F40000-0x000001E202F50000-memory.dmp

Filesize
64KB

Download
memory/1156-50-0x000001E201490000-0x000001E201491000-memory.dmp

Filesize
4KB

Download
memory/3156-31-0x000001BD80000000-0x000001BD81000000-memory.dmp

Filesize
16.0MB

Download
memory/3156-37-0x000001BD802B0000-0x000001BD802C0000-memory.dmp

Filesize
64KB

Download
memory/3156-36-0x000001BD802C0000-0x000001BD802D0000-memory.dmp

Filesize
64KB

Download
memory/3156-35-0x000001BD80280000-0x000001BD80290000-memory.dmp

Filesize
64KB

Download
memory/3156-33-0x000001BD80000000-0x000001BD81000000-memory.dmp

Filesize
16.0MB

Download
memory/3156-2-0x000001BD80000000-0x000001BD81000000-memory.dmp

Filesize
16.0MB

Download
memory/3156-22-0x000001BD80000000-0x000001BD81000000-memory.dmp

Filesize
16.0MB

Download
memory/3156-59-0x000001BD80000000-0x000001BD81000000-memory.dmp

Filesize
16.0MB

Download
memory/3156-11-0x000001BDF1810000-0x000001BDF1811000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads