Analysis
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max time kernel
36s -
max time network
133s -
platform
windows7_x64 -
resource
win7v20201028 -
submitted
20-01-2021 14:45
Static task
static1
Behavioral task
behavioral1
Sample
b2aeb4b06aabde854d9d2ddf06424178.exe
Resource
win7v20201028
Behavioral task
behavioral2
Sample
b2aeb4b06aabde854d9d2ddf06424178.exe
Resource
win10v20201028
General
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Target
b2aeb4b06aabde854d9d2ddf06424178.exe
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Size
1.4MB
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MD5
b2aeb4b06aabde854d9d2ddf06424178
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SHA1
07258d08ec2d9dafbced67f3b7ebf60cdb76268a
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SHA256
b18e1e1ca2d4f97f568e87e71ae9f0791821c2c4e2bb3385fa81b5829c1122b1
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SHA512
d89ad16ecea89f51369f4189db3ba12d80ed14f6e6c5a18a245300a20cfd8db91ab4a0ea286dfe90a8d22b1a15caf4d4aba818a14e35513e2bd52b9e90689482
Malware Config
Signatures
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Snake Keylogger
Keylogger and Infostealer first seen in November 2020.
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Snake Keylogger Payload 3 IoCs
Processes:
resource yara_rule behavioral1/memory/1160-24-0x0000000000400000-0x0000000000468000-memory.dmp family_snakekeylogger behavioral1/memory/1160-25-0x000000000046382E-mapping.dmp family_snakekeylogger behavioral1/memory/1160-28-0x0000000000400000-0x0000000000468000-memory.dmp family_snakekeylogger -
Executes dropped EXE 2 IoCs
Processes:
bsys.exeInstallUtil.exepid process 1296 bsys.exe 1160 InstallUtil.exe -
Drops startup file 1 IoCs
Processes:
b2aeb4b06aabde854d9d2ddf06424178.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bsys.lnk b2aeb4b06aabde854d9d2ddf06424178.exe -
Loads dropped DLL 2 IoCs
Processes:
b2aeb4b06aabde854d9d2ddf06424178.exebsys.exepid process 1724 b2aeb4b06aabde854d9d2ddf06424178.exe 1296 bsys.exe -
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
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Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
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Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes:
flow ioc 5 checkip.dyndns.org 10 freegeoip.app 11 freegeoip.app -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious use of SetThreadContext 1 IoCs
Processes:
bsys.exedescription pid process target process PID 1296 set thread context of 1160 1296 bsys.exe InstallUtil.exe -
Suspicious behavior: EnumeratesProcesses 14 IoCs
Processes:
b2aeb4b06aabde854d9d2ddf06424178.exebsys.exeInstallUtil.exepid process 1724 b2aeb4b06aabde854d9d2ddf06424178.exe 1724 b2aeb4b06aabde854d9d2ddf06424178.exe 1724 b2aeb4b06aabde854d9d2ddf06424178.exe 1724 b2aeb4b06aabde854d9d2ddf06424178.exe 1724 b2aeb4b06aabde854d9d2ddf06424178.exe 1296 bsys.exe 1296 bsys.exe 1160 InstallUtil.exe 1160 InstallUtil.exe 1160 InstallUtil.exe 1160 InstallUtil.exe 1160 InstallUtil.exe 1160 InstallUtil.exe 1160 InstallUtil.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
b2aeb4b06aabde854d9d2ddf06424178.exebsys.exeInstallUtil.exedescription pid process Token: SeDebugPrivilege 1724 b2aeb4b06aabde854d9d2ddf06424178.exe Token: SeDebugPrivilege 1296 bsys.exe Token: SeDebugPrivilege 1160 InstallUtil.exe -
Suspicious use of WriteProcessMemory 16 IoCs
Processes:
b2aeb4b06aabde854d9d2ddf06424178.exebsys.exedescription pid process target process PID 1724 wrote to memory of 1296 1724 b2aeb4b06aabde854d9d2ddf06424178.exe bsys.exe PID 1724 wrote to memory of 1296 1724 b2aeb4b06aabde854d9d2ddf06424178.exe bsys.exe PID 1724 wrote to memory of 1296 1724 b2aeb4b06aabde854d9d2ddf06424178.exe bsys.exe PID 1724 wrote to memory of 1296 1724 b2aeb4b06aabde854d9d2ddf06424178.exe bsys.exe PID 1296 wrote to memory of 1160 1296 bsys.exe InstallUtil.exe PID 1296 wrote to memory of 1160 1296 bsys.exe InstallUtil.exe PID 1296 wrote to memory of 1160 1296 bsys.exe InstallUtil.exe PID 1296 wrote to memory of 1160 1296 bsys.exe InstallUtil.exe PID 1296 wrote to memory of 1160 1296 bsys.exe InstallUtil.exe PID 1296 wrote to memory of 1160 1296 bsys.exe InstallUtil.exe PID 1296 wrote to memory of 1160 1296 bsys.exe InstallUtil.exe PID 1296 wrote to memory of 1160 1296 bsys.exe InstallUtil.exe PID 1296 wrote to memory of 1160 1296 bsys.exe InstallUtil.exe PID 1296 wrote to memory of 1160 1296 bsys.exe InstallUtil.exe PID 1296 wrote to memory of 1160 1296 bsys.exe InstallUtil.exe PID 1296 wrote to memory of 1160 1296 bsys.exe InstallUtil.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\b2aeb4b06aabde854d9d2ddf06424178.exe"C:\Users\Admin\AppData\Local\Temp\b2aeb4b06aabde854d9d2ddf06424178.exe"1⤵
- Drops startup file
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\bsys.exe"C:\Users\Admin\bsys.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\InstallUtil.exeMD5
91c9ae9c9a17a9db5e08b120e668c74c
SHA150770954c1ceb0bb6f1d5d3f2de2a0a065773723
SHA256e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f
SHA512ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e
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C:\Users\Admin\AppData\Local\Temp\InstallUtil.exeMD5
91c9ae9c9a17a9db5e08b120e668c74c
SHA150770954c1ceb0bb6f1d5d3f2de2a0a065773723
SHA256e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f
SHA512ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e
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C:\Users\Admin\bsys.exeMD5
b2aeb4b06aabde854d9d2ddf06424178
SHA107258d08ec2d9dafbced67f3b7ebf60cdb76268a
SHA256b18e1e1ca2d4f97f568e87e71ae9f0791821c2c4e2bb3385fa81b5829c1122b1
SHA512d89ad16ecea89f51369f4189db3ba12d80ed14f6e6c5a18a245300a20cfd8db91ab4a0ea286dfe90a8d22b1a15caf4d4aba818a14e35513e2bd52b9e90689482
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C:\Users\Admin\bsys.exeMD5
b2aeb4b06aabde854d9d2ddf06424178
SHA107258d08ec2d9dafbced67f3b7ebf60cdb76268a
SHA256b18e1e1ca2d4f97f568e87e71ae9f0791821c2c4e2bb3385fa81b5829c1122b1
SHA512d89ad16ecea89f51369f4189db3ba12d80ed14f6e6c5a18a245300a20cfd8db91ab4a0ea286dfe90a8d22b1a15caf4d4aba818a14e35513e2bd52b9e90689482
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\Users\Admin\AppData\Local\Temp\InstallUtil.exeMD5
91c9ae9c9a17a9db5e08b120e668c74c
SHA150770954c1ceb0bb6f1d5d3f2de2a0a065773723
SHA256e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f
SHA512ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e
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\Users\Admin\bsys.exeMD5
b2aeb4b06aabde854d9d2ddf06424178
SHA107258d08ec2d9dafbced67f3b7ebf60cdb76268a
SHA256b18e1e1ca2d4f97f568e87e71ae9f0791821c2c4e2bb3385fa81b5829c1122b1
SHA512d89ad16ecea89f51369f4189db3ba12d80ed14f6e6c5a18a245300a20cfd8db91ab4a0ea286dfe90a8d22b1a15caf4d4aba818a14e35513e2bd52b9e90689482
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memory/1160-24-0x0000000000400000-0x0000000000468000-memory.dmpFilesize
416KB
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memory/1160-25-0x000000000046382E-mapping.dmp
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memory/1160-30-0x00000000047C0000-0x00000000047C1000-memory.dmpFilesize
4KB
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memory/1160-28-0x0000000000400000-0x0000000000468000-memory.dmpFilesize
416KB
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memory/1160-27-0x0000000074D20000-0x000000007540E000-memory.dmpFilesize
6.9MB
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memory/1296-14-0x0000000000880000-0x0000000000881000-memory.dmpFilesize
4KB
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memory/1296-18-0x0000000004BB0000-0x0000000004BB1000-memory.dmpFilesize
4KB
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memory/1296-19-0x0000000000B90000-0x0000000000B9B000-memory.dmpFilesize
44KB
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memory/1296-20-0x0000000002100000-0x0000000002101000-memory.dmpFilesize
4KB
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memory/1296-23-0x0000000004BB1000-0x0000000004BB2000-memory.dmpFilesize
4KB
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memory/1296-10-0x0000000000000000-mapping.dmp
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memory/1296-13-0x0000000074D20000-0x000000007540E000-memory.dmpFilesize
6.9MB
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memory/1724-6-0x00000000001D0000-0x00000000001D1000-memory.dmpFilesize
4KB
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memory/1724-5-0x0000000000270000-0x000000000028E000-memory.dmpFilesize
120KB
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memory/1724-2-0x0000000074D20000-0x000000007540E000-memory.dmpFilesize
6.9MB
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memory/1724-3-0x0000000001230000-0x0000000001231000-memory.dmpFilesize
4KB
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memory/1724-7-0x0000000004C60000-0x0000000004C61000-memory.dmpFilesize
4KB
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memory/1724-8-0x0000000004C61000-0x0000000004C62000-memory.dmpFilesize
4KB