Analysis
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max time kernel
58s -
max time network
167s -
platform
windows7_x64 -
resource
win7-20220414-en -
submitted
21-05-2022 12:18
Static task
static1
Behavioral task
behavioral1
Sample
SKBMT__B.exe
Resource
win7-20220414-en
Behavioral task
behavioral2
Sample
SKBMT__B.exe
Resource
win10v2004-20220414-en
General
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Target
SKBMT__B.exe
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Size
807KB
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MD5
848160f98c9f8649b24e626a9b2b771c
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SHA1
0f9b15af9c94d497979efc1ad64e81ce89a8ed76
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SHA256
4e232298aee519176835a2da80f0a04ac027ac235a5b5ea51974c66318b59245
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SHA512
235f7516b632632a79994cc7d35a725a141d88f301d63c40d4c68ed225075769e2aae6f2d5671c638c002d1ad136e718534517e17d4a206391e40e63610db242
Malware Config
Extracted
C:\Users\Admin\AppData\Local\Temp\AEF946DCB4\Log.txt
masslogger
Signatures
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MassLogger
Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.
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MassLogger Main Payload 32 IoCs
resource yara_rule behavioral1/memory/660-61-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/660-62-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/660-63-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/660-64-0x00000000004ABEAE-mapping.dmp family_masslogger behavioral1/memory/660-66-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/660-68-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/660-70-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/660-72-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/660-74-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/660-76-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/660-78-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/660-80-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/660-82-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/660-84-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/660-86-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/660-88-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/660-90-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/660-92-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/660-94-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/660-96-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/660-98-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/660-100-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/660-102-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/660-104-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/660-108-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/660-106-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/660-110-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/660-112-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/660-114-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/660-116-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/660-118-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/660-120-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger -
MassLogger log file 1 IoCs
Detects a log file produced by MassLogger.
yara_rule masslogger_log_file -
ReZer0 packer 1 IoCs
Detects ReZer0, a packer with multiple versions used in various campaigns.
resource yara_rule behavioral1/memory/964-57-0x0000000005D60000-0x0000000005E18000-memory.dmp rezer0 -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Control Panel\International\Geo\Nation SKBMT__B.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.
flow ioc 4 api.ipify.org -
Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 964 set thread context of 660 964 SKBMT__B.exe 28 -
Suspicious behavior: EnumeratesProcesses 1 IoCs
pid Process 660 SKBMT__B.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 660 SKBMT__B.exe -
Suspicious use of WriteProcessMemory 9 IoCs
description pid Process procid_target PID 964 wrote to memory of 660 964 SKBMT__B.exe 28 PID 964 wrote to memory of 660 964 SKBMT__B.exe 28 PID 964 wrote to memory of 660 964 SKBMT__B.exe 28 PID 964 wrote to memory of 660 964 SKBMT__B.exe 28 PID 964 wrote to memory of 660 964 SKBMT__B.exe 28 PID 964 wrote to memory of 660 964 SKBMT__B.exe 28 PID 964 wrote to memory of 660 964 SKBMT__B.exe 28 PID 964 wrote to memory of 660 964 SKBMT__B.exe 28 PID 964 wrote to memory of 660 964 SKBMT__B.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\SKBMT__B.exe"C:\Users\Admin\AppData\Local\Temp\SKBMT__B.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:964 -
C:\Users\Admin\AppData\Local\Temp\SKBMT__B.exe"C:\Users\Admin\AppData\Local\Temp\SKBMT__B.exe"2⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:660
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