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Analysis
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max time kernel
87s -
max time network
88s -
platform
windows7_x64 -
resource
win7-20220414-en -
submitted
21/05/2022, 12:13
Static task
static1
Behavioral task
behavioral1
Sample
OUR_NEW_.exe
Resource
win7-20220414-en
Behavioral task
behavioral2
Sample
OUR_NEW_.exe
Resource
win10v2004-20220414-en
General
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Target
OUR_NEW_.exe
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Size
757KB
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MD5
5eecffe3b62b1e5c080028e6c489cc98
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SHA1
3fa94eff0cffe3fcad56d7e7b3dbcbac341211b5
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SHA256
571ab77f2e5d3069e9b1974cd7548dd28f4cef875b33698b42a846b6057a476e
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SHA512
eb79550f367005386cfc94a674a4c735484df3ff35f038401d5f7995bd0a01eb79d81be3c7b1f4c4b4c6a69dde0a5c28a3e81cd038efc843004310cd2d989cb5
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 33 IoCs
resource yara_rule behavioral1/memory/852-60-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/852-61-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/852-62-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/852-63-0x00000000004ABEAE-mapping.dmp family_masslogger behavioral1/memory/852-65-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/852-67-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/852-69-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/852-71-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/852-73-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/852-75-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/852-77-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/852-79-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/852-81-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/852-83-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/852-85-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/852-87-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/852-89-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/852-91-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/852-93-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/852-95-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/852-97-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/852-99-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/852-101-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/852-103-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/852-105-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/852-107-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/852-109-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/852-111-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/852-113-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/852-115-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/852-117-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/852-119-0x0000000000400000-0x00000000004B0000-memory.dmp family_masslogger behavioral1/memory/852-121-0x0000000000400000-0x00000000004B0000-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/2012-56-0x0000000004E70000-0x0000000004F28000-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 OUR_NEW_.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 2012 set thread context of 852 2012 OUR_NEW_.exe 28 -
Suspicious behavior: EnumeratesProcesses 1 IoCs
pid Process 852 OUR_NEW_.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 852 OUR_NEW_.exe -
Suspicious use of WriteProcessMemory 9 IoCs
description pid Process procid_target PID 2012 wrote to memory of 852 2012 OUR_NEW_.exe 28 PID 2012 wrote to memory of 852 2012 OUR_NEW_.exe 28 PID 2012 wrote to memory of 852 2012 OUR_NEW_.exe 28 PID 2012 wrote to memory of 852 2012 OUR_NEW_.exe 28 PID 2012 wrote to memory of 852 2012 OUR_NEW_.exe 28 PID 2012 wrote to memory of 852 2012 OUR_NEW_.exe 28 PID 2012 wrote to memory of 852 2012 OUR_NEW_.exe 28 PID 2012 wrote to memory of 852 2012 OUR_NEW_.exe 28 PID 2012 wrote to memory of 852 2012 OUR_NEW_.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\OUR_NEW_.exe"C:\Users\Admin\AppData\Local\Temp\OUR_NEW_.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2012 -
C:\Users\Admin\AppData\Local\Temp\OUR_NEW_.exe"C:\Users\Admin\AppData\Local\Temp\OUR_NEW_.exe"2⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:852
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