Analysis Overview
SHA256
3ba0993bd95aa81f72ad13fa9cfb2304f715bebe4a486b688d6b1252e8f67d44
Threat Level: Known bad
The file TeamViewer_Setup.exe was found to be: Known bad.
Malicious Activity Summary
VanillaRat
Vanilla Rat payload
Vanillarat family
Vanilla Rat payload
Executes dropped EXE
Loads dropped DLL
Adds Run key to start application
Legitimate hosting services abused for malware hosting/C2
Drops file in System32 directory
Unsigned PE
Enumerates physical storage devices
Suspicious use of SendNotifyMessage
Modifies registry key
Enumerates system info in registry
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Suspicious use of FindShellTrayWindow
Suspicious use of AdjustPrivilegeToken
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2023-07-17 16:45
Signatures
Vanilla Rat payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Vanillarat family
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2023-07-17 16:45
Reported
2023-07-17 16:47
Platform
win7-20230712-en
Max time kernel
57s
Max time network
106s
Command Line
Signatures
VanillaRat
Vanilla Rat payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
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Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\dllhоst.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\сsrss.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\TeamViewer_Setup.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\dllhоst.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run | C:\Windows\SysWOW64\reg.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\ChromeUpdate = "C:\\Windows\\SysWOW64\\dllhоst.exe" | C:\Windows\SysWOW64\reg.exe | N/A |
Legitimate hosting services abused for malware hosting/C2
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\dllhоst.exe | C:\Users\Admin\AppData\Local\Temp\TeamViewer_Setup.exe | N/A |
| File created | C:\Windows\SysWOW64\сsrss.exe | C:\Windows\SysWOW64\dllhоst.exe | N/A |
Enumerates physical storage devices
Enumerates system info in registry
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS | C:\Program Files\Google\Chrome\Application\chrome.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemProductName | C:\Program Files\Google\Chrome\Application\chrome.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemManufacturer | C:\Program Files\Google\Chrome\Application\chrome.exe | N/A |
Modifies registry key
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\reg.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\TeamViewer_Setup.exe
"C:\Users\Admin\AppData\Local\Temp\TeamViewer_Setup.exe"
C:\Windows\SysWOW64\dllhоst.exe
"C:\Windows\System32\dllhоst.exe"
C:\Windows\SysWOW64\reg.exe
reg add HKLM\Software\Microsoft\Windows\CurrentVersion\Run /v ChromeUpdate /t REG_SZ /d C:\Windows\SysWOW64\dllhоst.exe /f
C:\Windows\SysWOW64\сsrss.exe
"C:\Windows\SysWOW64\сsrss.exe"
C:\Program Files\Google\Chrome\Application\chrome.exe
"C:\Program Files\Google\Chrome\Application\chrome.exe"
C:\Program Files\Google\Chrome\Application\chrome.exe
"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" --url=https://clients2.google.com/cr/report --annotation=channel= --annotation=plat=Win64 --annotation=prod=Chrome --annotation=ver=106.0.5249.119 --initial-client-data=0xc0,0xc4,0xc8,0x94,0xcc,0x7fef6f69758,0x7fef6f69768,0x7fef6f69778
C:\Program Files\Google\Chrome\Application\chrome.exe
"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --gpu-preferences=UAAAAAAAAADgAAAYAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAEgAAAAAAAAASAAAAAAAAAAYAAAAAgAAABAAAAAAAAAAGAAAAAAAAAAQAAAAAAAAAAAAAAAOAAAAEAAAAAAAAAABAAAADgAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=1132 --field-trial-handle=1296,i,9724600648432707195,12262456619706013434,131072 /prefetch:2
C:\Program Files\Google\Chrome\Application\chrome.exe
"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=1512 --field-trial-handle=1296,i,9724600648432707195,12262456619706013434,131072 /prefetch:8
C:\Program Files\Google\Chrome\Application\chrome.exe
"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=1588 --field-trial-handle=1296,i,9724600648432707195,12262456619706013434,131072 /prefetch:8
C:\Program Files\Google\Chrome\Application\chrome.exe
"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --enable-chrome-cart --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --mojo-platform-channel-handle=2248 --field-trial-handle=1296,i,9724600648432707195,12262456619706013434,131072 /prefetch:1
C:\Program Files\Google\Chrome\Application\chrome.exe
"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --enable-chrome-cart --first-renderer-process --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --mojo-platform-channel-handle=2240 --field-trial-handle=1296,i,9724600648432707195,12262456619706013434,131072 /prefetch:1
C:\Program Files\Google\Chrome\Application\106.0.5249.119\elevation_service.exe
"C:\Program Files\Google\Chrome\Application\106.0.5249.119\elevation_service.exe"
C:\Program Files\Google\Chrome\Application\chrome.exe
"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --gpu-preferences=UAAAAAAAAADgAAAYAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAEgAAAAAAAAASAAAAAAAAAAYAAAAAgAAABAAAAAAAAAAGAAAAAAAAAAQAAAAAAAAAAAAAAAOAAAAEAAAAAAAAAABAAAADgAAAAgAAAAAAAAACAAAAAAAAAA= --use-gl=angle --use-angle=swiftshader-webgl --mojo-platform-channel-handle=1328 --field-trial-handle=1296,i,9724600648432707195,12262456619706013434,131072 /prefetch:2
C:\Program Files\Google\Chrome\Application\chrome.exe
"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --enable-chrome-cart --disable-gpu-compositing --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=8 --mojo-platform-channel-handle=1372 --field-trial-handle=1296,i,9724600648432707195,12262456619706013434,131072 /prefetch:1
C:\Program Files\Google\Chrome\Application\chrome.exe
"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --lang=en-US --service-sandbox-type=service --mojo-platform-channel-handle=3424 --field-trial-handle=1296,i,9724600648432707195,12262456619706013434,131072 /prefetch:8
C:\Program Files\Google\Chrome\Application\chrome.exe
"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --lang=en-US --service-sandbox-type=service --mojo-platform-channel-handle=3548 --field-trial-handle=1296,i,9724600648432707195,12262456619706013434,131072 /prefetch:8
C:\Program Files\Google\Chrome\Application\chrome.exe
"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --lang=en-US --service-sandbox-type=service --mojo-platform-channel-handle=3584 --field-trial-handle=1296,i,9724600648432707195,12262456619706013434,131072 /prefetch:8
C:\Program Files\Google\Chrome\Application\chrome.exe
"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --lang=en-US --service-sandbox-type=service --mojo-platform-channel-handle=3444 --field-trial-handle=1296,i,9724600648432707195,12262456619706013434,131072 /prefetch:8
C:\Program Files\Google\Chrome\Application\chrome.exe
"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=4020 --field-trial-handle=1296,i,9724600648432707195,12262456619706013434,131072 /prefetch:8
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 6.tcp.eu.ngrok.io | udp |
| DE | 3.68.171.119:10923 | 6.tcp.eu.ngrok.io | tcp |
| DE | 3.68.171.119:10923 | 6.tcp.eu.ngrok.io | tcp |
| DE | 3.68.171.119:10923 | 6.tcp.eu.ngrok.io | tcp |
| N/A | 224.0.0.251:5353 | udp |
Files
memory/1616-54-0x0000000000CA0000-0x0000000000CD2000-memory.dmp
memory/1616-55-0x0000000074800000-0x0000000074EEE000-memory.dmp
\Windows\SysWOW64\dllhоst.exe
| MD5 | d422f36032337b8996926d750b38fb15 |
| SHA1 | 3c469472c5eadd2af6d93d9498e62934149f104d |
| SHA256 | 9c7708aa2255ef6df7faa3eb2821687272ce7e02449419c2fcd5bcde69825a6e |
| SHA512 | 2ba5c12cdc456e437da314759f3d3385179d313ae1118edb3692e2e32759ab3be789b2e086c087ef0ac07c488d860495c99935aed32247b234e5e77f088f3e45 |
C:\Windows\SysWOW64\dllhоst.exe
| MD5 | d422f36032337b8996926d750b38fb15 |
| SHA1 | 3c469472c5eadd2af6d93d9498e62934149f104d |
| SHA256 | 9c7708aa2255ef6df7faa3eb2821687272ce7e02449419c2fcd5bcde69825a6e |
| SHA512 | 2ba5c12cdc456e437da314759f3d3385179d313ae1118edb3692e2e32759ab3be789b2e086c087ef0ac07c488d860495c99935aed32247b234e5e77f088f3e45 |
C:\Windows\SysWOW64\dllhоst.exe
| MD5 | d422f36032337b8996926d750b38fb15 |
| SHA1 | 3c469472c5eadd2af6d93d9498e62934149f104d |
| SHA256 | 9c7708aa2255ef6df7faa3eb2821687272ce7e02449419c2fcd5bcde69825a6e |
| SHA512 | 2ba5c12cdc456e437da314759f3d3385179d313ae1118edb3692e2e32759ab3be789b2e086c087ef0ac07c488d860495c99935aed32247b234e5e77f088f3e45 |
memory/2576-63-0x0000000000150000-0x0000000000178000-memory.dmp
memory/1616-65-0x0000000074800000-0x0000000074EEE000-memory.dmp
memory/2576-64-0x0000000074800000-0x0000000074EEE000-memory.dmp
memory/2576-66-0x0000000004D60000-0x0000000004DA0000-memory.dmp
\Windows\SysWOW64\сsrss.exe
| MD5 | 46876588de250f948d185a55b87c7c19 |
| SHA1 | 2d098bcc85ff38027797f8a89116dad249afe67d |
| SHA256 | 0206f4977c8992745fcfc19723a473c3a5ed9b92b990271dcfe4edce4e64ebc2 |
| SHA512 | 83af7f7a4e7629049fd41185e23d0c4cfba47db7300e4629cc7578dcfb1a403315c7e82b30dded4350e4c38abb942b08e17a1cc3557a2cf0f9ad8e0541e7f943 |
C:\Windows\SysWOW64\сsrss.exe
| MD5 | 46876588de250f948d185a55b87c7c19 |
| SHA1 | 2d098bcc85ff38027797f8a89116dad249afe67d |
| SHA256 | 0206f4977c8992745fcfc19723a473c3a5ed9b92b990271dcfe4edce4e64ebc2 |
| SHA512 | 83af7f7a4e7629049fd41185e23d0c4cfba47db7300e4629cc7578dcfb1a403315c7e82b30dded4350e4c38abb942b08e17a1cc3557a2cf0f9ad8e0541e7f943 |
C:\Windows\SysWOW64\сsrss.exe
| MD5 | 46876588de250f948d185a55b87c7c19 |
| SHA1 | 2d098bcc85ff38027797f8a89116dad249afe67d |
| SHA256 | 0206f4977c8992745fcfc19723a473c3a5ed9b92b990271dcfe4edce4e64ebc2 |
| SHA512 | 83af7f7a4e7629049fd41185e23d0c4cfba47db7300e4629cc7578dcfb1a403315c7e82b30dded4350e4c38abb942b08e17a1cc3557a2cf0f9ad8e0541e7f943 |
memory/2096-75-0x0000000074800000-0x0000000074EEE000-memory.dmp
memory/2096-74-0x00000000002B0000-0x00000000002D2000-memory.dmp
memory/2096-76-0x0000000000A20000-0x0000000000A60000-memory.dmp
memory/2576-77-0x0000000074800000-0x0000000074EEE000-memory.dmp
memory/2576-78-0x0000000004D60000-0x0000000004DA0000-memory.dmp
memory/2096-79-0x0000000074800000-0x0000000074EEE000-memory.dmp
memory/2096-80-0x0000000000A20000-0x0000000000A60000-memory.dmp
\??\pipe\crashpad_2880_NZLVSTOYVFBONIIJ
| MD5 | d41d8cd98f00b204e9800998ecf8427e |
| SHA1 | da39a3ee5e6b4b0d3255bfef95601890afd80709 |
| SHA256 | e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 |
| SHA512 | cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e |
C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Sync Data\LevelDB\000007.dbtmp
| MD5 | 18e723571b00fb1694a3bad6c78e4054 |
| SHA1 | afcc0ef32d46fe59e0483f9a3c891d3034d12f32 |
| SHA256 | 8af72f43857550b01eab1019335772b367a17a9884a7a759fdf4fe6f272b90aa |
| SHA512 | 43bb0af7d3984012d2d67ca6b71f0201e5b948e6fe26a899641c4c6f066c59906d468ddf7f1df5ea5fa33c2bc5ea8219c0f2c82e0a5c365ad7581b898a8859e2 |
C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\GPUCache\data_1
| MD5 | f50f89a0a91564d0b8a211f8921aa7de |
| SHA1 | 112403a17dd69d5b9018b8cede023cb3b54eab7d |
| SHA256 | b1e963d702392fb7224786e7d56d43973e9b9efd1b89c17814d7c558ffc0cdec |
| SHA512 | bf8cda48cf1ec4e73f0dd1d4fa5562af1836120214edb74957430cd3e4a2783e801fa3f4ed2afb375257caeed4abe958265237d6e0aacf35a9ede7a2e8898d58 |
C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences
| MD5 | b225b9c11183b16368fd90309ab07e79 |
| SHA1 | 86575fbece9b5ff748b83e0a0dd9fb7873502797 |
| SHA256 | a715122ecd2943218fc8443a4146ce775add1c0ce5db45f0dbe0563a6349af8b |
| SHA512 | 9c6e11636a1fcfd8addf9c289eecfc99a9a9ae0329f3fa7424280739d74aef5b940404071e3457bf77be8df2b914c8ce37c40da53c2fcd76df3199d612725f60 |
C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Local State
| MD5 | 5ecc32dd49b9b11df3aa6d679cf16fec |
| SHA1 | b41e0ed6b215e59d387e722e88a56766693cd74f |
| SHA256 | 9037381c0a658593f7b759bd919abc13f311d684a35241a32dc2edda28da20e8 |
| SHA512 | 484257efcd4a37101bcbdff0c536bca18d1108601106430221a89019803ab742bb68635f5e99edb6ae5eeab0688050f004e088f97fa96cb547bfcfb82229f619 |
C:\Users\Admin\AppData\Local\Google\Chrome\User Data\90b85e50-8767-46c3-8493-e7a568d90c16.tmp
| MD5 | a6c2cf7349a6b3ff0263af9d597916a4 |
| SHA1 | cb786254b3474b40a751a69b2a3d35d5259ea73b |
| SHA256 | c5e57e22787987ec8bb721a1e95dbe2177883e7e1f6665703e46b2dfa48db166 |
| SHA512 | 7d7d208f022f3385c1dd2cb3ee63feb4bc62ed1ab3aa0a886fb6e714e96247846d966f07ea6015e7b84d5ecfa0df990511cc146cdedf3b5c3b937bed88405af4 |