snakekeylogger | 7ee5fb764d9e66297d7cef858020c2599195d6227032bca40727cd220473c903

Analysis

max time kernel
73s
max time network
146s
platform
windows7_x64
resource
win7v20201028
submitted
20-01-2021 06:37

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General

Target

IMG_25579.doc
Size

1.0MB
MD5

9e084497b2eccc1b7b5a06327c58da66
SHA1

a7c8f1d8ca2bb54214611445708270f19cea5bd6
SHA256

7ee5fb764d9e66297d7cef858020c2599195d6227032bca40727cd220473c903
SHA512

569b29b7e86efbaeccf0781f3d040797f5ed7202495489f3bdb40861c8a341c9aaf6e827f03d22af05a0396b653c78bc97342f4d88fa1c1b3094ef2b38955b73

Score

10^/10

snakekeylogger keylogger spyware stealer

Malware Config

Signatures

Snake Keylogger
Keylogger and Infostealer first seen in November 2020.
stealer keylogger snakekeylogger

Snake Keylogger Payload 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1020-35-0x0000000000400000-0x0000000000468000-memory.dmp	family_snakekeylogger
behavioral1/memory/1020-36-0x000000000046370E-mapping.dmp	family_snakekeylogger
behavioral1/memory/1020-39-0x0000000000400000-0x0000000000468000-memory.dmp	family_snakekeylogger

Blocklisted process makes network request 2 IoCs

Processes:

EQNEDT32.EXE

flow pid process

6 1684 EQNEDT32.EXE
8 1684 EQNEDT32.EXE
Executes dropped EXE 3 IoCs

Processes:

69577.exebsys.exeInstallUtil.exe

pid process

740 69577.exe
1736 bsys.exe
1020 InstallUtil.exe
Drops startup file 1 IoCs

Processes:

69577.exe

description ioc process

File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bsys.lnk 69577.exe
Loads dropped DLL 3 IoCs

Processes:

EQNEDT32.EXE69577.exebsys.exe

pid process

1684 EQNEDT32.EXE
740 69577.exe
1736 bsys.exe
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware

Data from Local System
T1005

Credentials in Files
T1081
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

13 freegeoip.app
9 checkip.dyndns.org
12 freegeoip.app
Suspicious use of SetThreadContext 1 IoCs

Processes:

bsys.exe

description pid process target process

PID 1736 set thread context of 1020 1736 bsys.exe InstallUtil.exe
Drops file in Windows directory 1 IoCs

Processes:

WINWORD.EXE

description ioc process

File opened for modification C:\Windows\Debug\WIA\wiatrace.log WINWORD.EXE
Office loads VBA resources, possible macro or embedded object present
Launches Equation Editor 1 TTPs 1 IoCs
Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.
exploit

Exploitation for Client Execution
T1203

Processes:

EQNEDT32.EXE

pid process

1684 EQNEDT32.EXE

flow	pid	process
6	1684	EQNEDT32.EXE
8	1684	EQNEDT32.EXE

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bsys.lnk	69577.exe

pid	process
1684	EQNEDT32.EXE
740	69577.exe
1736	bsys.exe

flow	ioc
13	freegeoip.app
9	checkip.dyndns.org
12	freegeoip.app

description	pid	process	target process
PID 1736 set thread context of 1020	1736	bsys.exe	InstallUtil.exe

description	ioc	process
File opened for modification	C:\Windows\Debug\WIA\wiatrace.log	WINWORD.EXE

pid	process
1684	EQNEDT32.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

Processes:

WINWORD.EXE

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	WINWORD.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	WINWORD.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\Toolbar	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt	WINWORD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

WINWORD.EXE

pid process

1064 WINWORD.EXE

pid	process
1064	WINWORD.EXE

Suspicious behavior: EnumeratesProcesses 14 IoCs

Processes:

69577.exebsys.exeInstallUtil.exe

pid	process
740	69577.exe
740	69577.exe
740	69577.exe
740	69577.exe
740	69577.exe
1736	bsys.exe
1736	bsys.exe
1020	InstallUtil.exe
1020	InstallUtil.exe
1020	InstallUtil.exe
1020	InstallUtil.exe
1020	InstallUtil.exe
1020	InstallUtil.exe
1020	InstallUtil.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

69577.exebsys.exeInstallUtil.exe

description pid process

Token: SeDebugPrivilege 740 69577.exe
Token: SeDebugPrivilege 1736 bsys.exe
Token: SeDebugPrivilege 1020 InstallUtil.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

WINWORD.EXE

pid process

1064 WINWORD.EXE
1064 WINWORD.EXE

description	pid	process
Token: SeDebugPrivilege	740	69577.exe
Token: SeDebugPrivilege	1736	bsys.exe
Token: SeDebugPrivilege	1020	InstallUtil.exe

pid	process
1064	WINWORD.EXE
1064	WINWORD.EXE

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

WINWORD.EXEEQNEDT32.EXE69577.exebsys.exe

description	pid	process	target process
PID 1064 wrote to memory of 1484	1064	WINWORD.EXE	splwow64.exe
PID 1064 wrote to memory of 1484	1064	WINWORD.EXE	splwow64.exe
PID 1064 wrote to memory of 1484	1064	WINWORD.EXE	splwow64.exe
PID 1064 wrote to memory of 1484	1064	WINWORD.EXE	splwow64.exe
PID 1684 wrote to memory of 740	1684	EQNEDT32.EXE	69577.exe
PID 1684 wrote to memory of 740	1684	EQNEDT32.EXE	69577.exe
PID 1684 wrote to memory of 740	1684	EQNEDT32.EXE	69577.exe
PID 1684 wrote to memory of 740	1684	EQNEDT32.EXE	69577.exe
PID 740 wrote to memory of 1736	740	69577.exe	bsys.exe
PID 740 wrote to memory of 1736	740	69577.exe	bsys.exe
PID 740 wrote to memory of 1736	740	69577.exe	bsys.exe
PID 740 wrote to memory of 1736	740	69577.exe	bsys.exe
PID 1736 wrote to memory of 1020	1736	bsys.exe	InstallUtil.exe
PID 1736 wrote to memory of 1020	1736	bsys.exe	InstallUtil.exe
PID 1736 wrote to memory of 1020	1736	bsys.exe	InstallUtil.exe
PID 1736 wrote to memory of 1020	1736	bsys.exe	InstallUtil.exe
PID 1736 wrote to memory of 1020	1736	bsys.exe	InstallUtil.exe
PID 1736 wrote to memory of 1020	1736	bsys.exe	InstallUtil.exe
PID 1736 wrote to memory of 1020	1736	bsys.exe	InstallUtil.exe
PID 1736 wrote to memory of 1020	1736	bsys.exe	InstallUtil.exe
PID 1736 wrote to memory of 1020	1736	bsys.exe	InstallUtil.exe
PID 1736 wrote to memory of 1020	1736	bsys.exe	InstallUtil.exe
PID 1736 wrote to memory of 1020	1736	bsys.exe	InstallUtil.exe
PID 1736 wrote to memory of 1020	1736	bsys.exe	InstallUtil.exe

C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\IMG_25579.doc"
1⤵
- Drops file in Windows directory
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1064

C:\Windows\splwow64.exe
C:\Windows\splwow64.exe 12288
2⤵
PID:1484

C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
"C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
1⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Launches Equation Editor
- Suspicious use of WriteProcessMemory
PID:1684

C:\Users\Public\69577.exe
"C:\Users\Public\69577.exe"
2⤵
- Executes dropped EXE
- Drops startup file
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:740

C:\Users\Admin\bsys.exe
"C:\Users\Admin\bsys.exe"
3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1736

C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
"C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"
4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1020

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Exploitation for Client Execution

T1203

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
MD5
91c9ae9c9a17a9db5e08b120e668c74c

SHA1
50770954c1ceb0bb6f1d5d3f2de2a0a065773723

SHA256
e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f

SHA512
ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e

Download Submit
C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
MD5
91c9ae9c9a17a9db5e08b120e668c74c

SHA1
50770954c1ceb0bb6f1d5d3f2de2a0a065773723

SHA256
e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f

SHA512
ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\6RZTNJ9I.txt
MD5
29b7a1c9d669b8db6bf04b3ccc0fab98

SHA1
28eb70ed4e6c530cebb5892e1d2290eaefe3a476

SHA256
7310f0883328444bad92442e02538b0320b6cd644ecbda639552546923325984

SHA512
64ccab4c72ead7b661cc7d725a4e051d22d9509baf9737c52ac001f82e9272da8df043b7200db1c14affa3380122d3d5e20ca92fdc6820d303105f1e238bd340

Download Submit
C:\Users\Admin\bsys.exe
MD5
5ab98f94682ec463f48cada8b9811055

SHA1
550fc889de33b94a63dfaf1138bcc54be489f767

SHA256
b1c89b167239238aea8a718d40751a1233ab4b9479b19e6feb86ed5a4c9aec20

SHA512
e3e4ed794ebf4bf3e246eab58699df4b822fdea5cab238b1a838c09b2d596a5228db934e631a843010df618e42524a32e7d4b750d536c9f20c827b78d71b87c6

Download Submit
C:\Users\Admin\bsys.exe
MD5
5ab98f94682ec463f48cada8b9811055

SHA1
550fc889de33b94a63dfaf1138bcc54be489f767

SHA256
b1c89b167239238aea8a718d40751a1233ab4b9479b19e6feb86ed5a4c9aec20

SHA512
e3e4ed794ebf4bf3e246eab58699df4b822fdea5cab238b1a838c09b2d596a5228db934e631a843010df618e42524a32e7d4b750d536c9f20c827b78d71b87c6

Download Submit
C:\Users\Public\69577.exe
MD5
5ab98f94682ec463f48cada8b9811055

SHA1
550fc889de33b94a63dfaf1138bcc54be489f767

SHA256
b1c89b167239238aea8a718d40751a1233ab4b9479b19e6feb86ed5a4c9aec20

SHA512
e3e4ed794ebf4bf3e246eab58699df4b822fdea5cab238b1a838c09b2d596a5228db934e631a843010df618e42524a32e7d4b750d536c9f20c827b78d71b87c6

Download Submit
C:\Users\Public\69577.exe
MD5
5ab98f94682ec463f48cada8b9811055

SHA1
550fc889de33b94a63dfaf1138bcc54be489f767

SHA256
b1c89b167239238aea8a718d40751a1233ab4b9479b19e6feb86ed5a4c9aec20

SHA512
e3e4ed794ebf4bf3e246eab58699df4b822fdea5cab238b1a838c09b2d596a5228db934e631a843010df618e42524a32e7d4b750d536c9f20c827b78d71b87c6

Download Submit
\Users\Admin\AppData\Local\Temp\InstallUtil.exe
MD5
91c9ae9c9a17a9db5e08b120e668c74c

SHA1
50770954c1ceb0bb6f1d5d3f2de2a0a065773723

SHA256
e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f

SHA512
ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e

Download Submit
\Users\Admin\bsys.exe
MD5
5ab98f94682ec463f48cada8b9811055

SHA1
550fc889de33b94a63dfaf1138bcc54be489f767

SHA256
b1c89b167239238aea8a718d40751a1233ab4b9479b19e6feb86ed5a4c9aec20

SHA512
e3e4ed794ebf4bf3e246eab58699df4b822fdea5cab238b1a838c09b2d596a5228db934e631a843010df618e42524a32e7d4b750d536c9f20c827b78d71b87c6

Download Submit
\Users\Public\69577.exe
MD5
5ab98f94682ec463f48cada8b9811055

SHA1
550fc889de33b94a63dfaf1138bcc54be489f767

SHA256
b1c89b167239238aea8a718d40751a1233ab4b9479b19e6feb86ed5a4c9aec20

SHA512
e3e4ed794ebf4bf3e246eab58699df4b822fdea5cab238b1a838c09b2d596a5228db934e631a843010df618e42524a32e7d4b750d536c9f20c827b78d71b87c6

Download Submit
memory/740-17-0x0000000000330000-0x000000000034E000-memory.dmp

Filesize
120KB

Download
memory/740-10-0x0000000000000000-mapping.dmp

Download
memory/740-14-0x0000000000BD0000-0x0000000000BD1000-memory.dmp

Filesize
4KB

Download
memory/740-16-0x0000000004CF0000-0x0000000004CF1000-memory.dmp

Filesize
4KB

Download
memory/740-13-0x000000006ACA0000-0x000000006B38E000-memory.dmp

Filesize
6.9MB

Download
memory/740-18-0x00000000002A0000-0x00000000002A1000-memory.dmp

Filesize
4KB

Download
memory/740-19-0x0000000004CF1000-0x0000000004CF2000-memory.dmp

Filesize
4KB

Download
memory/1020-39-0x0000000000400000-0x0000000000468000-memory.dmp

Filesize
416KB

Download
memory/1020-41-0x0000000004970000-0x0000000004971000-memory.dmp

Filesize
4KB

Download
memory/1020-38-0x000000006ACA0000-0x000000006B38E000-memory.dmp

Filesize
6.9MB

Download
memory/1020-36-0x000000000046370E-mapping.dmp

Download
memory/1020-35-0x0000000000400000-0x0000000000468000-memory.dmp

Filesize
416KB

Download
memory/1064-3-0x000000006FD81000-0x000000006FD83000-memory.dmp

Filesize
8KB

Download
memory/1064-2-0x0000000072301000-0x0000000072304000-memory.dmp

Filesize
12KB

Download
memory/1064-4-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1484-6-0x000007FEFB7F1000-0x000007FEFB7F3000-memory.dmp

Filesize
8KB

Download
memory/1484-5-0x0000000000000000-mapping.dmp

Download
memory/1684-7-0x0000000076101000-0x0000000076103000-memory.dmp

Filesize
8KB

Download
memory/1736-31-0x0000000000630000-0x0000000000631000-memory.dmp

Filesize
4KB

Download
memory/1736-34-0x0000000004A31000-0x0000000004A32000-memory.dmp

Filesize
4KB

Download
memory/1736-30-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/1736-29-0x0000000004A30000-0x0000000004A31000-memory.dmp

Filesize
4KB

Download
memory/1736-25-0x0000000000AC0000-0x0000000000AC1000-memory.dmp

Filesize
4KB

Download
memory/1736-24-0x000000006ACA0000-0x000000006B38E000-memory.dmp

Filesize
6.9MB

Download
memory/1736-21-0x0000000000000000-mapping.dmp

Download
memory/1796-8-0x000007FEF7140000-0x000007FEF73BA000-memory.dmp

Filesize
2.5MB

Download