20b545c7b0b0cb56926972b7fc2a94f428b7aa3e4f9f4e65d1bd0ad800fb60b7

General

Target
OperaInstaller.exe
Size 178KB
Sample260808-kb39vstaje
SHA256 20b545c7b0b0cb56926972b7fc2a94f428b7aa3e4f9f4e65d1bd0ad800fb60b7
MD5 4ef32b114eaa6f05340b46d0f48154c7
SHA1 a07219dc2a0fa96f5f9a03b1bb350c9ab2679d3f
SHA512 6631937f30fcfdc536bd14735870c9c4592f4414e9c1d71ec69c718bf341ff286174b782c6a23a6c29744be940bcac34aa93845e60727e090bee8423d738ea9d
SSDEEP 3072:IYHHEa1Lz5KhEwh5kc9+5sFoq0X/r6LGV4RxJ0OZnS+Rl//bRRlTHGVJp99vqRy:IYEwP5KhVyc9esFoBvum4RvGJTEy
TLSH
T1EB046B823AC184B5E5B244321864DBB19A7DFC700F65D9DB73987A3B5DB02C09932F6B
MD5 SHA1 SHA512 SSDEEP TLSH

Score

8^/10

Malware Config

Signatures

Downloads MZ/PE file 1 IoCs

flow	pid	Process
12	1360	OperaInstaller.exe

Executes dropped EXE 6 IoCs

pid	Process
4828	OpInst.exe
2512	installer.exe
1536	installer.exe
468	installer.exe
3744	installer.exe
1568	installer.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003
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

Enumerates connected drives 3 TTPs 4 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\E:	installer.exe
File opened (read-only)	\??\F:	installer.exe
File opened (read-only)	\??\E:	installer.exe
File opened (read-only)	\??\F:	installer.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	OperaInstaller.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	OpInst.exe

Enumerates system info in registry 2 TTPs 4 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS	installer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemProductName	installer.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS	installer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemProductName	installer.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1360 wrote to memory of 4828	1360	OperaInstaller.exe	90
PID 4828 wrote to memory of 2512	4828	OpInst.exe	91
PID 2512 wrote to memory of 1536	2512	installer.exe	92
PID 2512 wrote to memory of 468	2512	installer.exe	93
PID 2512 wrote to memory of 3744	2512	installer.exe	94
PID 3744 wrote to memory of 1568	3744	installer.exe	95

C:\Users\Admin\AppData\Local\Temp\OperaInstaller.exe
"C:\Users\Admin\AppData\Local\Temp\OperaInstaller.exe"
1⤵
- Downloads MZ/PE file
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1360
- C:\Users\Admin\AppData\Local\Temp\OpInst.exe
  "C:\Users\Admin\AppData\Local\Temp\OpInst.exe" --silent --allusers=0 --setdefaultbrowser=1
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4828
- - C:\Users\Admin\AppData\Local\Temp\7zSCD2BF43A\installer.exe
    C:\Users\Admin\AppData\Local\Temp\7zSCD2BF43A\installer.exe --silent --allusers=0 --setdefaultbrowser=1 --server-tracking-blob=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
    3⤵
    - Executes dropped EXE
    - Enumerates connected drives
    - Enumerates system info in registry
    - Suspicious use of WriteProcessMemory
    PID:2512
  - - C:\Users\Admin\AppData\Local\Temp\7zSCD2BF43A\installer.exe
      C:\Users\Admin\AppData\Local\Temp\7zSCD2BF43A\installer.exe --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Roaming\Opera Software\Opera Stable" /prefetch:4 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Roaming\Opera Software\Opera Stable\Crash Reports" "--crash-count-file=C:\Users\Admin\AppData\Roaming\Opera Software\Opera Stable\crash_count.txt" --url=https://crashstats-collector-2.opera.com/ --annotation=channel=Stable --annotation=plat=Win64 --annotation=prod=OperaDesktop --annotation=ver=134.0.5954.46 --initial-client-data=0x2ac,0x2b0,0x2b4,0x288,0x2b8,0x7ff7927bad88,0x7ff7927bad94,0x7ff7927bada0
      4⤵
      Executes dropped EXE
      PID:1536
  - - C:\Users\Admin\AppData\Local\Temp\.opera\b87d0012-2725-42c3-bcc6-cfbfb88bc600 Opera Installer Temp\installer.exe
      "C:\Users\Admin\AppData\Local\Temp\.opera\b87d0012-2725-42c3-bcc6-cfbfb88bc600 Opera Installer Temp\installer.exe" --version
      4⤵
      Executes dropped EXE
      PID:468
  - - C:\Users\Admin\AppData\Local\Temp\7zSCD2BF43A\installer.exe
      "C:\Users\Admin\AppData\Local\Temp\7zSCD2BF43A\installer.exe" --backend --install --import-browser-data=0 --enable-crash-reporting=1 --enable-stats=1 --enable-installer-stats=1 --consent-given=0 --general-interests=0 --general-location=0 --personalized-content=0 --personalized-ads=0 --launchopera=1 --showunbox=0 --installfolder="C:\Users\Admin\AppData\Local\Programs\Opera" --profile-folder --language=en --singleprofile=0 --copyonly=0 --allusers=0 --setdefaultbrowser=1 --pintotaskbar=1 --pintostartmenu=0 --run-at-startup=1 --show-intro-overlay --server-tracking-data=server_tracking_data --initial-pid=2512 --package-dir-prefix="C:\Users\Admin\AppData\Local\Temp\.opera\b87d0012-2725-42c3-bcc6-cfbfb88bc600 Opera Installer Temp\opera_package_20260808092749" --session-guid=dbb454a7-a78f-4f0e-8bbe-219e0d4efb38 --server-tracking-blob=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 --silent --desktopshortcut=1 --wait-for-package --initial-proc-handle=9807000000000000
      4⤵
      Executes dropped EXE
      Enumerates connected drives
      Enumerates system info in registry
      Suspicious use of WriteProcessMemory
      PID:3744
    - - C:\Users\Admin\AppData\Local\Temp\7zSCD2BF43A\installer.exe
        
        C:\Users\Admin\AppData\Local\Temp\7zSCD2BF43A\installer.exe --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Roaming\Opera Software\Opera Stable" /prefetch:4 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Roaming\Opera Software\Opera Stable\Crash Reports" "--crash-count-file=C:\Users\Admin\AppData\Roaming\Opera Software\Opera Stable\crash_count.txt" --url=https://crashstats-collector-2.opera.com/ --annotation=channel=Stable --annotation=plat=Win64 --annotation=prod=OperaDesktop --annotation=ver=134.0.5954.46 --initial-client-data=0x2b8,0x2bc,0x2c0,0x288,0x2c4,0x7ff7927bad88,0x7ff7927bad94,0x7ff7927bada0
        5⤵
        Executes dropped EXE
        
        PID:1568

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

3

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

E2C6CBAF0AF08CF203BA74BF0D0AB6D5_CB77E3D8FE906716C4DEE1FAFFCB74A5

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\E2C6CBAF0AF08CF203BA74BF0D0AB6D5_CB77E3D8FE906716C4DEE1FAFFCB74A5
Size 471B
SHA256 f2a49e1ab71f3012516877d8b25012066d4364f2cda9838c367b9e8e96da5c5c
MD5 20c32aeed9ae8fe59b2ae39d2e74eada
SHA1 35f8eff287b8699fb901219083095a6eba9c82ee
SHA512 803a853dd8fdc6ca74c5c1df8030af7a406cb8881c6c6b84d491641245787ebb5dc50dffcdf22f0afc5d1542545d24e4dabe8862b5e11157d0a5e83b4be6bd8b
TLSH
T1E7F0D453C06DF8756D308CED18D0D5323C91251900630861A82C9CFAA6193D91F15528
MD5 SHA1 SHA512 TLSH

Submit Download

E2C6CBAF0AF08CF203BA74BF0D0AB6D5_CB77E3D8FE906716C4DEE1FAFFCB74A5

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\E2C6CBAF0AF08CF203BA74BF0D0AB6D5_CB77E3D8FE906716C4DEE1FAFFCB74A5
Size 416B
SHA256 eb8cef05623b68763cde9d31ef31758966d20b416386fd7254f75f61aa69e8b9
MD5 59fe37c1ae904eb448bcdb37603defac
SHA1 105c296f0ea10006c56228b4796a457a9c758ce2
SHA512 4c346cabb8e9ec67747d6bad01cdc89cb1fe1bf0e366acce5b56c073c081fa954f326baba967fd44b78cd0a9fc55d793d830e81521aaaa545dce6cc639f05374
TLSH
T1EDE0C03425F7016DF5F4D478CFDDB531084AF0260458A2B01BE45708B606D40EE12A37
MD5 SHA1 SHA512 TLSH

Submit Download

installer.exe

Path C:\Users\Admin\AppData\Local\Temp\7zSCD2BF43A\installer.exe
Size 8.3MB
SHA256 c2a6825b895b245bab9774e69a450a11a4352eafa8d4da5fdad0e81341d4e67e
MD5 9dbf6590b693218b7ef20ae8de7eef6f
SHA1 6d8a4f3e48bbeab782da7166a8700bc35ad39416
SHA512 ebe898c89ec43db14a2744078941647737350cc27bb515fa83713e372576c0ce77e5ede72b227d2dfc369bca1c6244b3ceca5ee443259023c05d636ba81f8147
SSDEEP 98304:2h6i+ubH0SElWmLmgm3yrglOgw+Mne2ZQYNY8AFH:Ti+ubH0SElWEZmXFH
TLSH
T1EF967C53F2A601E8D06FCA748B7A523299757C464B31A3EF0A943A251E75FD46F3CB20
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

OpInst.exe

Path C:\Users\Admin\AppData\Local\Temp\OpInst.exe
Size 3.1MB
SHA256 f7fa772179cca85953464f895db96a4dc361b3a3f25b922137815881de9d465b
MD5 26cd8bd5f8acd0c6851f488e8f1e6380
SHA1 da49ac388ce4d2b9237a72db9f13babc748b1b75
SHA512 cdcd7205951302ae0712cbd929cd521950e4dbabc7beef97e9f5e950014de007b51e8ef5e46e7239ecbef1c8ccb4596948b60af2f7613c612f5e6cc1b4de9254
SSDEEP 49152:AVAbwXR+eb2jcWlFwfYud53AgGKP9u1ce+UhAOlY+FGXVRrmUFLW:sAO6IWzwQuddo11ce+UnlpFG0
TLSH
T12FE523127A81C835C5B311334F89F659A17DF9621F32D6CB37981A6F8EB06C09929F4B
MD5 SHA1 SHA512 SSDEEP TLSH

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bg.png

Path C:\Users\Admin\AppData\Local\Temp\bg.png
Size 224KB
SHA256 5fa976ea5780439175bb696817cd6eab3625ba5ccfe5b220587130ed5e1da855
MD5 21eb6b8232802f32b6483eedb96677bb
SHA1 b390f01600e521586e210936a4b57a6b89e66a7b
SHA512 5cfcb0278e5e7473dde396ee34115a3f50a9ad195d99b53cc5cc33a169a42c8f729806491fc0fb607719139081fa3c774c37b1638de1289b73c0c4c80768cfcd
SSDEEP 3072:7MuA+f6FJxlUhyLg2cugpbM5Q+jBre6cAJqmm6nkrw8sGaDy7y8bRzUnKdh8BfM9:7MuAWojcVdGSf+4BML49RzUnKUuLZ
TLSH
T1E92423876BC391F4590BD65FE9386BEC3CD4E7EC82AB113C931A42424D8416B85DE8F2
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

settings.dat

Path C:\Users\Admin\AppData\Roaming\Opera Software\Opera Stable\Crash Reports\settings.dat
Size 40B
SHA256 48ae9a6287c1d76c3574a9860ade44c269b08019c6a24105ba018a52146126a0
MD5 68a83e10245a7f02270d977a57f9e61e
SHA1 39ebf694b89844747f05c26ee2003734a45486ba
SHA512 507d9f53e9b82c8d3c41a6c1101468bea6df73548dcd46c1597b32761da57b9be0e8e05ece89d6135f9d7d2856174c15b9840e749a0b5ac2998c8967172b7c5d
MD5 SHA1 SHA512

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads