masslogger | e9575adae2fa6afb6b8d8fb098feec9d4acbadabda4beeca90433b578cd6afa1

Analysis

max time kernel
45s
max time network
46s
platform
windows7_x64
resource
win7v20201028
submitted
15-12-2020 12:19

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General

Target

TIRNAK.exe
Size

29KB
MD5

2cb0cf48d5eafbd16bbf8cdda749d628
SHA1

1b71449f295eae0994f4d62de838b1af168c0a09
SHA256

e9575adae2fa6afb6b8d8fb098feec9d4acbadabda4beeca90433b578cd6afa1
SHA512

1f6e0be8e3c66aa8a1ac7e41b26b0b29bf055039c3bd8116cb33aa5874077c1325fcbfc0a934e2fdd6da89acea34b1cf2875147f0470346afeca7e9193d79927

Score

10^/10

masslogger persistence spyware stealer

Malware Config

Extracted

Credentials

Protocol: smtp
Host:
mail.porathacorp.com
Port:
587
Username:
devarajan@porathacorp.com
Password:
susila@22

Signatures

MassLogger
Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.
stealer spyware masslogger

MassLogger Main Payload 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1636-8-0x0000000000400000-0x0000000000486000-memory.dmp	family_masslogger
behavioral1/memory/1636-9-0x000000000048184E-mapping.dmp	family_masslogger
behavioral1/memory/1636-10-0x0000000000400000-0x0000000000486000-memory.dmp	family_masslogger
behavioral1/memory/1636-11-0x0000000000400000-0x0000000000486000-memory.dmp	family_masslogger

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

Processes:

TIRNAK.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "explorer.exe,\"C:\\Users\\Admin\\AppData\\Local\\Temp\\TIRNAK.exe\""	TIRNAK.exe

Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.

Query Registry
T1012

System Information Discovery
T1082

Processes:

TIRNAK.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Control Panel\International\Geo\Nation TIRNAK.exe
Deletes itself 1 IoCs

Processes:

powershell.exe

pid process

756 powershell.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Control Panel\International\Geo\Nation	TIRNAK.exe

pid	process
756	powershell.exe

Drops startup file 2 IoCs

Processes:

TIRNAK.exe

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\TIRNAK.exe	TIRNAK.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\TIRNAK.exe	TIRNAK.exe

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

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

TIRNAK.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Windows\CurrentVersion\Run\<Unknown> = "C:\\Users\\Admin\\AppData\\Local\\Temp\\TIRNAK.exe"	TIRNAK.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Windows\CurrentVersion\Run\TIRNAK.exe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\TIRNAK.exe"	TIRNAK.exe

Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

8 api.ipify.org
Suspicious use of SetThreadContext 1 IoCs

Processes:

TIRNAK.exe

description pid process target process

PID 1668 set thread context of 1636 1668 TIRNAK.exe TIRNAK.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

2044 timeout.exe
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

TIRNAK.exe

pid process

1636 TIRNAK.exe
Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

TIRNAK.exepowershell.exepowershell.exe

pid process

1636 TIRNAK.exe
1636 TIRNAK.exe
1636 TIRNAK.exe
1636 TIRNAK.exe
536 powershell.exe
536 powershell.exe
756 powershell.exe
756 powershell.exe

flow	ioc
8	api.ipify.org

description	pid	process	target process
PID 1668 set thread context of 1636	1668	TIRNAK.exe	TIRNAK.exe

pid	process
2044	timeout.exe

pid	process
1636	TIRNAK.exe

pid	process
1636	TIRNAK.exe
1636	TIRNAK.exe
1636	TIRNAK.exe
1636	TIRNAK.exe
536	powershell.exe
536	powershell.exe
756	powershell.exe
756	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

TIRNAK.exeTIRNAK.exepowershell.exepowershell.exe

description	pid	process
Token: SeDebugPrivilege	1668	TIRNAK.exe
Token: SeDebugPrivilege	1636	TIRNAK.exe
Token: SeDebugPrivilege	536	powershell.exe
Token: SeDebugPrivilege	756	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

TIRNAK.exe

pid process

1636 TIRNAK.exe

pid	process
1636	TIRNAK.exe

Suspicious use of WriteProcessMemory 25 IoCs

Processes:

TIRNAK.execmd.exeTIRNAK.exe

description	pid	process	target process
PID 1668 wrote to memory of 836	1668	TIRNAK.exe	cmd.exe
PID 1668 wrote to memory of 836	1668	TIRNAK.exe	cmd.exe
PID 1668 wrote to memory of 836	1668	TIRNAK.exe	cmd.exe
PID 1668 wrote to memory of 836	1668	TIRNAK.exe	cmd.exe
PID 836 wrote to memory of 2044	836	cmd.exe	timeout.exe
PID 836 wrote to memory of 2044	836	cmd.exe	timeout.exe
PID 836 wrote to memory of 2044	836	cmd.exe	timeout.exe
PID 836 wrote to memory of 2044	836	cmd.exe	timeout.exe
PID 1668 wrote to memory of 1636	1668	TIRNAK.exe	TIRNAK.exe
PID 1668 wrote to memory of 1636	1668	TIRNAK.exe	TIRNAK.exe
PID 1668 wrote to memory of 1636	1668	TIRNAK.exe	TIRNAK.exe
PID 1668 wrote to memory of 1636	1668	TIRNAK.exe	TIRNAK.exe
PID 1668 wrote to memory of 1636	1668	TIRNAK.exe	TIRNAK.exe
PID 1668 wrote to memory of 1636	1668	TIRNAK.exe	TIRNAK.exe
PID 1668 wrote to memory of 1636	1668	TIRNAK.exe	TIRNAK.exe
PID 1668 wrote to memory of 1636	1668	TIRNAK.exe	TIRNAK.exe
PID 1668 wrote to memory of 1636	1668	TIRNAK.exe	TIRNAK.exe
PID 1636 wrote to memory of 536	1636	TIRNAK.exe	powershell.exe
PID 1636 wrote to memory of 536	1636	TIRNAK.exe	powershell.exe
PID 1636 wrote to memory of 536	1636	TIRNAK.exe	powershell.exe
PID 1636 wrote to memory of 536	1636	TIRNAK.exe	powershell.exe
PID 1636 wrote to memory of 756	1636	TIRNAK.exe	powershell.exe
PID 1636 wrote to memory of 756	1636	TIRNAK.exe	powershell.exe
PID 1636 wrote to memory of 756	1636	TIRNAK.exe	powershell.exe
PID 1636 wrote to memory of 756	1636	TIRNAK.exe	powershell.exe

C:\Users\Admin\AppData\Local\Temp\TIRNAK.exe
"C:\Users\Admin\AppData\Local\Temp\TIRNAK.exe"
1⤵
- Modifies WinLogon for persistence
- Drops startup file
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1668

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout 4.903
2⤵
- Suspicious use of WriteProcessMemory
PID:836

C:\Windows\SysWOW64\timeout.exe
timeout 4.903
3⤵
- Delays execution with timeout.exe
PID:2044

C:\Users\Admin\AppData\Local\Temp\TIRNAK.exe
"C:\Users\Admin\AppData\Local\Temp\TIRNAK.exe"
2⤵
- Checks computer location settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1636

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"powershell" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\TIRNAK.exe'
3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:536

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"powershell" Start-Sleep -Seconds 2; Remove-Item -path 'C:\Users\Admin\AppData\Local\Temp\TIRNAK.exe'
3⤵
- Deletes itself
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:756

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

T1004

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

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\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_03bfaf74-c48a-406b-812c-2684df821d22
MD5
597009ea0430a463753e0f5b1d1a249e

SHA1
4e38b8bb65ecbd5c9f0d3d8c47f7caba33de6c62

SHA256
3fd2a8217a845c43dbc0dc206c28be81d2687aa9ba62019d905aef10cfaec45d

SHA512
5d722fa908e64575b2497c60d142e182011a10c6ed33813b3b4796b3147ece1bc96938518b4c8911a1bac3b7560528ebe3e8e754c11015516d335df5d7c6871d

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_1b0b2f5a-4fa9-4284-9780-9a1da7b14a47
MD5
02ff38ac870de39782aeee04d7b48231

SHA1
0390d39fa216c9b0ecdb38238304e518fb2b5095

SHA256
fbd66a9baf753db31b8de23f2d51b67f8676687503653103080c45b16f1dc876

SHA512
24a1ff76ee42ff7a5ea42843928c4df07b06178f7781cd840e1e086e88735d81506eb67259ff1e6ce5aaa7c5baea03886da265eb7e025ff4dc4c4b5f8cd3e341

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_85c7c16f-de6b-4cda-bf8a-ede9c5910d3d
MD5
df44874327d79bd75e4264cb8dc01811

SHA1
1396b06debed65ea93c24998d244edebd3c0209d

SHA256
55de642c5c9e436ec01c57004dae797022442c3245daf7162d19a5585f221181

SHA512
95dc9298b8db059bbe746f67e6a7f8515781c7053cc60c01532e47623a996be7e1bd23d1bd8f5f2045adff27454f44930d503c15b695690088841cedbd2a06c3

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_a02197da-f9c8-43e6-9ff1-846e01d2d404
MD5
75a8da7754349b38d64c87c938545b1b

SHA1
5c28c257d51f1c1587e29164cc03ea880c21b417

SHA256
bf08151c174b5d00c9dbc7907b2c6a01b4be76bfa3afce1e8bd98a04ad833c96

SHA512
798797bc74c56c874e9a5fdcb0157c04e37a1b3cce285ef064b01bceef8cec45f11a5198918c6c647220b62883606b5e12e3cca3ea369f3a66e69dea6e15f643

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_b771b377-145f-49e9-bf64-45e69646f7b9
MD5
5e3c7184a75d42dda1a83606a45001d8

SHA1
94ca15637721d88f30eb4b6220b805c5be0360ed

SHA256
8278033a65d1ff48be4d86e11f87930d187692f59f8bf2f0a9d170de285afb59

SHA512
fae99b6e9b106e0f1c30aa4082b25ae1ad643455c1295c2c16ad534e3e611b9b08492353ffe1af1cfdddc9b2b7c330747a64012c45e62b8f4a4982dcc214e05b

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_c356f451-13b2-41fc-8d4c-54a293efa6e1
MD5
b6d38f250ccc9003dd70efd3b778117f

SHA1
d5a17c02cac698d4f0a4a9b7d71db2aa19e3f18a

SHA256
4de9d7b5ccab7b67ca8efc83084c7ee6e5e872b7216ed4683bc5da950bf41265

SHA512
67d8195836b7f280d3f9219fd0f58276342e55d5dfdd8a4c54355030d96685d73f1b2b6da0eb39322ec7c3a1d1c5ef06b52d22646cea30a96f822de1800d31e9

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_ce569c42-07bf-442e-b377-8e9695c9383c
MD5
be4d72095faf84233ac17b94744f7084

SHA1
cc78ce5b9c57573bd214a8f423ee622b00ebb1ec

SHA256
b0d72c5c22e57913476ac8fc686a4593f137c6667d5094522c0a0685dabd7adc

SHA512
43856e9b1032b8690ceea810c931bed3655e9190414bb220fb6afc136f31b8335e07604dffb28405d4006f266a54cff424c527d29924b1b732c9647a3252b097

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_dadf780e-0f00-49bb-86e1-35585efd8a97
MD5
a725bb9fafcf91f3c6b7861a2bde6db2

SHA1
8bb5b83f3cc37ff1e5ea4f02acae38e72364c114

SHA256
51651f27f54c7261887037aa1de4eff0a26c6807906dfc34a15cd5a0b58a8431

SHA512
1c4b21dd5660bfec8347257bb3da64681b0a97c427790d9ab3484f687dac032bcff0e07876635953697b00cf83e7d37f97c44e0219627fd0533f60ed3024b97e

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheIndex
MD5
bf6d9623ad5e5e0177feb0c4d291c433

SHA1
a183a979aef7ac6d2b70a85e7d41fc0c0c434c97

SHA256
88fcea7c42875374f45662a27f413a8b40eff420221033cb75a3f532488a4370

SHA512
8f99aa03d854fcc07de722196f505b34c7ed6903469536b3444892407f626dcc68095d5e5e84b304a561b19d6e21614e4f8a19d17319c02d2550d708c23a8201

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms
MD5
200bb6d615fca3160740c5e64a714377

SHA1
6483cd1dfec406ef793b833328312e194f99287f

SHA256
23b029f900cda4456e350789a3d01121af40703d13c09f65aab64c49f407ca1d

SHA512
3f0fc3c4a8ceda36c2093ab35457e80702a4d4f5b326a1d7cffd40f994a403f6b2be3f11746e9f56897986439aa6e4d0cc31a6bd02205920a50005d45d2355df

Download Submit
memory/536-31-0x00000000060E0000-0x00000000060E1000-memory.dmp

Filesize
4KB

Download
memory/536-53-0x0000000006300000-0x0000000006301000-memory.dmp

Filesize
4KB

Download
memory/536-16-0x0000000073910000-0x0000000073FFE000-memory.dmp

Filesize
6.9MB

Download
memory/536-15-0x0000000000000000-mapping.dmp

Download
memory/536-19-0x0000000001DC0000-0x0000000001DC1000-memory.dmp

Filesize
4KB

Download
memory/536-20-0x00000000047D0000-0x00000000047D1000-memory.dmp

Filesize
4KB

Download
memory/536-21-0x0000000002520000-0x0000000002521000-memory.dmp

Filesize
4KB

Download
memory/536-22-0x00000000052E0000-0x00000000052E1000-memory.dmp

Filesize
4KB

Download
memory/536-25-0x0000000006060000-0x0000000006061000-memory.dmp

Filesize
4KB

Download
memory/536-30-0x00000000060A0000-0x00000000060A1000-memory.dmp

Filesize
4KB

Download
memory/536-54-0x0000000006310000-0x0000000006311000-memory.dmp

Filesize
4KB

Download
memory/536-38-0x0000000006280000-0x0000000006281000-memory.dmp

Filesize
4KB

Download
memory/536-39-0x0000000005610000-0x0000000005611000-memory.dmp

Filesize
4KB

Download
memory/756-57-0x0000000074640000-0x0000000074D2E000-memory.dmp

Filesize
6.9MB

Download
memory/756-55-0x0000000000000000-mapping.dmp

Download
memory/756-72-0x00000000057E0000-0x00000000057E1000-memory.dmp

Filesize
4KB

Download
memory/756-71-0x0000000006230000-0x0000000006231000-memory.dmp

Filesize
4KB

Download
memory/756-58-0x0000000002400000-0x0000000002401000-memory.dmp

Filesize
4KB

Download
memory/756-59-0x0000000004910000-0x0000000004911000-memory.dmp

Filesize
4KB

Download
memory/756-60-0x0000000002690000-0x0000000002691000-memory.dmp

Filesize
4KB

Download
memory/756-61-0x00000000053F0000-0x00000000053F1000-memory.dmp

Filesize
4KB

Download
memory/836-5-0x0000000000000000-mapping.dmp

Download
memory/1636-12-0x0000000073910000-0x0000000073FFE000-memory.dmp

Filesize
6.9MB

Download
memory/1636-11-0x0000000000400000-0x0000000000486000-memory.dmp

Filesize
536KB

Download
memory/1636-10-0x0000000000400000-0x0000000000486000-memory.dmp

Filesize
536KB

Download
memory/1636-9-0x000000000048184E-mapping.dmp

Download
memory/1636-8-0x0000000000400000-0x0000000000486000-memory.dmp

Filesize
536KB

Download
memory/1636-17-0x0000000005330000-0x0000000005369000-memory.dmp

Filesize
228KB

Download
memory/1636-18-0x0000000006070000-0x00000000060FD000-memory.dmp

Filesize
564KB

Download
memory/1668-7-0x0000000000570000-0x0000000000604000-memory.dmp

Filesize
592KB

Download
memory/1668-2-0x0000000074640000-0x0000000074D2E000-memory.dmp

Filesize
6.9MB

Download
memory/1668-3-0x00000000008C0000-0x00000000008C1000-memory.dmp

Filesize
4KB

Download
memory/2044-6-0x0000000000000000-mapping.dmp

Download