| File name: | Brontok.exe |
| Full analysis: | https://app.any.run/tasks/c2791a90-a434-4bf3-aa27-2775a609b064 |
| Verdict: | Malicious activity |
| Threats: | Trojans are a group of malicious programs distinguished by their ability to masquerade as benign software. Depending on their type, trojans possess a variety of capabilities, ranging from maintaining full remote control over the victim’s machine to stealing data and files, as well as dropping other malware. At the same time, the main functionality of each trojan family can differ significantly depending on its type. The most common trojan infection chain starts with a phishing email. |
| Analysis date: | February 05, 2024, 22:56:48 |
| OS: | Windows 7 Professional Service Pack 1 (build: 7601, 32 bit) |
| Tags: | |
| Indicators: | |
| MIME: | application/x-dosexec |
| File info: | MS-DOS executable PE32 executable (GUI) Intel 80386, for MS Windows |
| MD5: | D7506150617460E34645025F1CA2C74B |
| SHA1: | 5E7D5DAF73A72473795D591F831E8A2054947668 |
| SHA256: | 941EBF1DC12321BBE430994A55F6E22A1B83CEA2FA7D281484EA2DAB06353112 |
| SSDEEP: | 768:i9R/zAKUQfZw7j4KBHZD8f5R3ETmv48Xxh04UwQaMzl6G1gNov35BMCQ:0AcwPf5D8rUTmnX9maQ6SgM5U |
| .exe | | | Win32 Executable (generic) (52.9) |
|---|---|---|
| .exe | | | Generic Win/DOS Executable (23.5) |
| .exe | | | DOS Executable Generic (23.5) |
| MachineType: | Intel 386 or later, and compatibles |
|---|---|
| TimeStamp: | 1987:01:30 04:38:08+01:00 |
| ImageFileCharacteristics: | No relocs, Executable, No line numbers, No symbols, 32-bit |
| PEType: | PE32 |
| LinkerVersion: | 5.12 |
| CodeSize: | 512 |
| InitializedDataSize: | - |
| UninitializedDataSize: | - |
| EntryPoint: | 0x0154 |
| OSVersion: | 4 |
| ImageVersion: | - |
| SubsystemVersion: | 4 |
| Subsystem: | Windows GUI |
PID | CMD | Path | Indicators | Parent process | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 584 | C:\Users\admin\AppData\Local\winlogon.exe | C:\Users\admin\AppData\Local\winlogon.exe | smss.exe | ||||||||||||
User: admin Integrity Level: MEDIUM Exit code: 0 Modules
| |||||||||||||||
| 752 | "C:\Users\admin\AppData\Local\Temp\Brontok.exe" | C:\Users\admin\AppData\Local\Temp\Brontok.exe | explorer.exe | ||||||||||||
User: admin Integrity Level: MEDIUM Exit code: 0 Modules
| |||||||||||||||
| 1028 | C:\Users\admin\AppData\Local\lsass.exe | C:\Users\admin\AppData\Local\lsass.exe | smss.exe | ||||||||||||
User: admin Integrity Level: MEDIUM Exit code: 0 Modules
| |||||||||||||||
| 1172 | C:\Users\admin\AppData\Local\smss.exe | C:\Users\admin\AppData\Local\smss.exe | Brontok.exe | ||||||||||||
User: admin Integrity Level: MEDIUM Exit code: 0 Modules
| |||||||||||||||
| 1632 | explorer.exe | C:\Windows\explorer.exe | — | Brontok.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Windows Explorer Exit code: 1 Version: 6.1.7600.16385 (win7_rtm.090713-1255) Modules
| |||||||||||||||
| 1876 | "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --disable-gpu-compositing --lang=en-US --device-scale-factor=1 --num-raster-threads=2 --enable-main-frame-before-activation --renderer-client-id=8 --mojo-platform-channel-handle=1216 --field-trial-handle=1196,i,4237395470198735416,112555544688865144,131072 --disable-features=OptimizationGuideModelDownloading,OptimizationHints,OptimizationHintsFetching,OptimizationTargetPrediction /prefetch:1 | C:\Program Files\Google\Chrome\Application\chrome.exe | — | chrome.exe | |||||||||||
User: admin Company: Google LLC Integrity Level: LOW Description: Google Chrome Exit code: 0 Version: 109.0.5414.120 Modules
| |||||||||||||||
| 1976 | "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --lang=en-US --service-sandbox-type=none --disable-quic --mojo-platform-channel-handle=1828 --field-trial-handle=1196,i,4237395470198735416,112555544688865144,131072 --disable-features=OptimizationGuideModelDownloading,OptimizationHints,OptimizationHintsFetching,OptimizationTargetPrediction /prefetch:8 | C:\Program Files\Google\Chrome\Application\chrome.exe | — | chrome.exe | |||||||||||
User: admin Company: Google LLC Integrity Level: MEDIUM Description: Google Chrome Exit code: 0 Version: 109.0.5414.120 Modules
| |||||||||||||||
| 2136 | "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --lang=en-US --service-sandbox-type=service --disable-quic --mojo-platform-channel-handle=1604 --field-trial-handle=1196,i,4237395470198735416,112555544688865144,131072 --disable-features=OptimizationGuideModelDownloading,OptimizationHints,OptimizationHintsFetching,OptimizationTargetPrediction /prefetch:8 | C:\Program Files\Google\Chrome\Application\chrome.exe | — | chrome.exe | |||||||||||
User: admin Company: Google LLC Integrity Level: LOW Description: Google Chrome Exit code: 0 Version: 109.0.5414.120 Modules
| |||||||||||||||
| 3040 | C:\Users\admin\AppData\Local\inetinfo.exe | C:\Users\admin\AppData\Local\inetinfo.exe | smss.exe | ||||||||||||
User: admin Integrity Level: MEDIUM Exit code: 0 Modules
| |||||||||||||||
| 3056 | "C:\Program Files\Google\Chrome\Application\chrome.exe" "--disable-features=OptimizationGuideModelDownloading,OptimizationHintsFetching,OptimizationTargetPrediction,OptimizationHints" | C:\Program Files\Google\Chrome\Application\chrome.exe | explorer.exe | ||||||||||||
User: admin Company: Google LLC Integrity Level: MEDIUM Description: Google Chrome Exit code: 0 Version: 109.0.5414.120 Modules
| |||||||||||||||
| (PID) Process: | (752) Brontok.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced |
| Operation: | write | Name: | Hidden |
Value: 1 | |||
| (PID) Process: | (752) Brontok.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced |
| Operation: | write | Name: | HideFileExt |
Value: 0 | |||
| (PID) Process: | (1172) smss.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run |
| Operation: | write | Name: | Tok-Cirrhatus |
Value: "C:\Users\admin\AppData\Local\smss.exe" | |||
| (PID) Process: | (1172) smss.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced |
| Operation: | write | Name: | Hidden |
Value: 0 | |||
| (PID) Process: | (1172) smss.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced |
| Operation: | write | Name: | HideFileExt |
Value: 1 | |||
| (PID) Process: | (1172) smss.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced |
| Operation: | write | Name: | ShowSuperHidden |
Value: 0 | |||
| (PID) Process: | (584) winlogon.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run |
| Operation: | write | Name: | Tok-Cirrhatus |
Value: "C:\Users\admin\AppData\Local\smss.exe" | |||
| (PID) Process: | (584) winlogon.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced |
| Operation: | write | Name: | Hidden |
Value: 0 | |||
| (PID) Process: | (584) winlogon.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced |
| Operation: | write | Name: | HideFileExt |
Value: 1 | |||
| (PID) Process: | (584) winlogon.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced |
| Operation: | write | Name: | ShowSuperHidden |
Value: 0 | |||
PID | Process | Filename | Type | |
|---|---|---|---|---|
| 3056 | chrome.exe | C:\Users\admin\AppData\Local\Google\Chrome\User Data\Default\commerce_subscription_db\LOG.old~RF16e2a4.TMP | — | |
MD5:— | SHA256:— | |||
| 3056 | chrome.exe | C:\Users\admin\AppData\Local\Google\Chrome\User Data\Default\commerce_subscription_db\LOG.old | — | |
MD5:— | SHA256:— | |||
| 752 | Brontok.exe | C:\Users\admin\AppData\Local\csrss.exe | executable | |
MD5:D7506150617460E34645025F1CA2C74B | SHA256:941EBF1DC12321BBE430994A55F6E22A1B83CEA2FA7D281484EA2DAB06353112 | |||
| 3040 | inetinfo.exe | C:\Users\admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\57C8EDB95DF3F0AD4EE2DC2B8CFD4157 | binary | |
MD5:80EC45FCD9039FCB01F1981AAD65C6C3 | SHA256:D6422384C6729DDA5FC8751A7F7124B1FE794E76DEF39A9B68234449E64376CC | |||
| 752 | Brontok.exe | C:\Users\admin\AppData\Local\lsass.exe | executable | |
MD5:D7506150617460E34645025F1CA2C74B | SHA256:941EBF1DC12321BBE430994A55F6E22A1B83CEA2FA7D281484EA2DAB06353112 | |||
| 1172 | smss.exe | C:\Users\admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Empty.pif | executable | |
MD5:D7506150617460E34645025F1CA2C74B | SHA256:941EBF1DC12321BBE430994A55F6E22A1B83CEA2FA7D281484EA2DAB06353112 | |||
| 752 | Brontok.exe | C:\Users\admin\AppData\Local\inetinfo.exe | executable | |
MD5:D7506150617460E34645025F1CA2C74B | SHA256:941EBF1DC12321BBE430994A55F6E22A1B83CEA2FA7D281484EA2DAB06353112 | |||
| 1172 | smss.exe | C:\Users\admin\AppData\Roaming\Microsoft\Windows\Templates\WowTumpeh.com | executable | |
MD5:D7506150617460E34645025F1CA2C74B | SHA256:941EBF1DC12321BBE430994A55F6E22A1B83CEA2FA7D281484EA2DAB06353112 | |||
| 1172 | smss.exe | C:\Users\admin\AppData\Local\winlogon.exe | executable | |
MD5:D7506150617460E34645025F1CA2C74B | SHA256:941EBF1DC12321BBE430994A55F6E22A1B83CEA2FA7D281484EA2DAB06353112 | |||
| 752 | Brontok.exe | C:\Users\admin\AppData\Local\Temp\~DFAE0273F6630FB117.TMP | binary | |
MD5:14EC6C89EF3F51A5C7B261A2DCDE6069 | SHA256:FBBA05627879A76D1E1487244DFB7C500532E820FA512417BA1125E0D2B8F994 | |||
PID | Process | Method | HTTP Code | IP | URL | CN | Type | Size | Reputation |
|---|---|---|---|---|---|---|---|---|---|
3040 | inetinfo.exe | GET | 301 | 18.136.37.69:80 | http://www.geocities.com/stabro7ok/BrontokInf8.txt | unknown | html | 4.34 Kb | unknown |
3040 | inetinfo.exe | GET | 301 | 74.6.231.21:80 | http://yahoo.com/ | unknown | text | 8 b | unknown |
3040 | inetinfo.exe | GET | 304 | 93.184.221.240:80 | http://ctldl.windowsupdate.com/msdownload/update/v3/static/trustedr/en/disallowedcertstl.cab?89894486c550f277 | unknown | — | — | unknown |
1080 | svchost.exe | GET | 200 | 93.184.221.240:80 | http://ctldl.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab?c503292d7802e201 | unknown | compressed | 65.2 Kb | unknown |
856 | svchost.exe | HEAD | 200 | 34.104.35.123:80 | http://edgedl.me.gvt1.com/edgedl/release2/chrome_component/acf5iuk6pnjlc6lnxtqm5ki6eoqq_112.300.200/gkmgaooipdjhmangpemjhigmamcehddo_112.300.200_win_aclnpjhtsv44pze3qmxsxb7fq66q.crx3 | unknown | — | — | unknown |
1080 | svchost.exe | GET | 304 | 93.184.221.240:80 | http://ctldl.windowsupdate.com/msdownload/update/v3/static/trustedr/en/disallowedcertstl.cab?1b8fee253118cbef | unknown | compressed | 65.2 Kb | unknown |
856 | svchost.exe | GET | 206 | 34.104.35.123:80 | http://edgedl.me.gvt1.com/edgedl/release2/chrome_component/acf5iuk6pnjlc6lnxtqm5ki6eoqq_112.300.200/gkmgaooipdjhmangpemjhigmamcehddo_112.300.200_win_aclnpjhtsv44pze3qmxsxb7fq66q.crx3 | unknown | binary | 6.19 Kb | unknown |
856 | svchost.exe | GET | 206 | 34.104.35.123:80 | http://edgedl.me.gvt1.com/edgedl/release2/chrome_component/acf5iuk6pnjlc6lnxtqm5ki6eoqq_112.300.200/gkmgaooipdjhmangpemjhigmamcehddo_112.300.200_win_aclnpjhtsv44pze3qmxsxb7fq66q.crx3 | unknown | binary | 7.79 Kb | unknown |
856 | svchost.exe | GET | 206 | 34.104.35.123:80 | http://edgedl.me.gvt1.com/edgedl/release2/chrome_component/acf5iuk6pnjlc6lnxtqm5ki6eoqq_112.300.200/gkmgaooipdjhmangpemjhigmamcehddo_112.300.200_win_aclnpjhtsv44pze3qmxsxb7fq66q.crx3 | unknown | binary | 10.4 Kb | unknown |
856 | svchost.exe | GET | 206 | 34.104.35.123:80 | http://edgedl.me.gvt1.com/edgedl/release2/chrome_component/acf5iuk6pnjlc6lnxtqm5ki6eoqq_112.300.200/gkmgaooipdjhmangpemjhigmamcehddo_112.300.200_win_aclnpjhtsv44pze3qmxsxb7fq66q.crx3 | unknown | binary | 10.4 Kb | unknown |
PID | Process | IP | Domain | ASN | CN | Reputation |
|---|---|---|---|---|---|---|
4 | System | 192.168.100.255:137 | — | — | — | whitelisted |
4 | System | 192.168.100.255:138 | — | — | — | whitelisted |
1080 | svchost.exe | 224.0.0.252:5355 | — | — | — | unknown |
3040 | inetinfo.exe | 18.136.37.69:80 | www.geocities.com | AMAZON-02 | SG | unknown |
3040 | inetinfo.exe | 74.6.231.21:80 | yahoo.com | YAHOO-NE1 | US | unknown |
3040 | inetinfo.exe | 74.6.231.21:443 | yahoo.com | YAHOO-NE1 | US | unknown |
3040 | inetinfo.exe | 93.184.221.240:80 | ctldl.windowsupdate.com | EDGECAST | GB | whitelisted |
3040 | inetinfo.exe | 192.229.221.95:80 | ocsp.digicert.com | EDGECAST | US | whitelisted |
3040 | inetinfo.exe | 87.248.119.251:443 | www.yahoo.com | Yahoo! UK Services Limited | GB | unknown |
3056 | chrome.exe | 239.255.255.250:1900 | — | — | — | unknown |
Domain | IP | Reputation |
|---|---|---|
www.geocities.com |
| malicious |
yahoo.com |
| whitelisted |
ctldl.windowsupdate.com |
| whitelisted |
ocsp.digicert.com |
| whitelisted |
www.yahoo.com |
| whitelisted |
clientservices.googleapis.com |
| whitelisted |
accounts.google.com |
| shared |
www.google.com |
| whitelisted |
update.googleapis.com |
| whitelisted |
www.googleapis.com |
| whitelisted |
PID | Process | Class | Message |
|---|---|---|---|
3040 | inetinfo.exe | A Network Trojan was detected | ET MALWARE Brontok User-Agent Detected (Brontok.A3 Browser) |
3040 | inetinfo.exe | A Network Trojan was detected | ET MALWARE Brontok User-Agent Detected (Brontok.A3 Browser) |