masslogger | 4fb747b6c79d7e978c661fd3479124e92c5be6ba644c370dd4acd633e3d5fdf7

Analysis

max time kernel
150s
max time network
170s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
21-05-2022 00:31

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General

Target

OOCS DI 20002876.exe
Size

1.4MB
MD5

27f8ea7f5eca57a8ad069629b50f942e
SHA1

2ac3264d1221cf22de0f38690dfb4bbdd2a694a1
SHA256

83b37e01d5d48f6a7bc0557863a4e91e84dfc8a1e721850ea265f78cbd6d275a
SHA512

e4dfd9a5aaab3713ca06a7d8808b3ff06c09c6c3fb101cab5d87af46a830a6447bfb66396c911e4ef3ae5fca96c60c25db633ec7f3ae09ccea22808df05d8e35

Score

10^/10

masslogger spyware stealer

Malware Config

Signatures

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

MassLogger Main Payload 35 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2912-130-0x0000000000050000-0x00000000001C2000-memory.dmp	family_masslogger
C:\Users\Admin\AppData\Roaming\chu.exe	family_masslogger
C:\Users\Admin\AppData\Roaming\chu.exe	family_masslogger
behavioral2/memory/3716-142-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral2/memory/3716-146-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral2/memory/3716-148-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral2/memory/3716-150-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral2/memory/3716-152-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral2/memory/3716-154-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral2/memory/3716-156-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral2/memory/3716-158-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral2/memory/3716-160-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral2/memory/3716-162-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral2/memory/3716-164-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral2/memory/3716-166-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral2/memory/3716-168-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral2/memory/3716-170-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral2/memory/3716-172-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral2/memory/3716-174-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral2/memory/3716-176-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral2/memory/3716-178-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral2/memory/3716-180-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral2/memory/3716-182-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral2/memory/3716-184-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral2/memory/3716-186-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral2/memory/3716-188-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral2/memory/3716-190-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral2/memory/3716-192-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral2/memory/3716-194-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral2/memory/3716-196-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral2/memory/3716-198-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral2/memory/3716-200-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral2/memory/3716-202-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral2/memory/3716-204-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral2/memory/3716-206-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger

Executes dropped EXE 2 IoCs

Processes:

chu.exeInstallUtil.exe

pid process

220 chu.exe
3716 InstallUtil.exe

pid	process
220	chu.exe
3716	InstallUtil.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

OOCS DI 20002876.exechu.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation	OOCS DI 20002876.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation	chu.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

chu.exe

description pid process target process

PID 220 set thread context of 3716 220 chu.exe InstallUtil.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	pid	process	target process
PID 220 set thread context of 3716	220	chu.exe	InstallUtil.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

Processes:

OOCS DI 20002876.exechu.exe

pid	process
2912	OOCS DI 20002876.exe
2912	OOCS DI 20002876.exe
2912	OOCS DI 20002876.exe
2912	OOCS DI 20002876.exe
2912	OOCS DI 20002876.exe
2912	OOCS DI 20002876.exe
2912	OOCS DI 20002876.exe
2912	OOCS DI 20002876.exe
2912	OOCS DI 20002876.exe
2912	OOCS DI 20002876.exe
2912	OOCS DI 20002876.exe
2912	OOCS DI 20002876.exe
2912	OOCS DI 20002876.exe
2912	OOCS DI 20002876.exe
2912	OOCS DI 20002876.exe
2912	OOCS DI 20002876.exe
2912	OOCS DI 20002876.exe
2912	OOCS DI 20002876.exe
2912	OOCS DI 20002876.exe
2912	OOCS DI 20002876.exe
2912	OOCS DI 20002876.exe
2912	OOCS DI 20002876.exe
220	chu.exe
220	chu.exe
220	chu.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

OOCS DI 20002876.exechu.exeInstallUtil.exe

description pid process

Token: SeDebugPrivilege 2912 OOCS DI 20002876.exe
Token: SeDebugPrivilege 220 chu.exe
Token: SeDebugPrivilege 3716 InstallUtil.exe

description	pid	process
Token: SeDebugPrivilege	2912	OOCS DI 20002876.exe
Token: SeDebugPrivilege	220	chu.exe
Token: SeDebugPrivilege	3716	InstallUtil.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

OOCS DI 20002876.execmd.exechu.execmd.exe

description	pid	process	target process
PID 2912 wrote to memory of 4484	2912	OOCS DI 20002876.exe	cmd.exe
PID 2912 wrote to memory of 4484	2912	OOCS DI 20002876.exe	cmd.exe
PID 2912 wrote to memory of 4484	2912	OOCS DI 20002876.exe	cmd.exe
PID 4484 wrote to memory of 4220	4484	cmd.exe	reg.exe
PID 4484 wrote to memory of 4220	4484	cmd.exe	reg.exe
PID 4484 wrote to memory of 4220	4484	cmd.exe	reg.exe
PID 2912 wrote to memory of 220	2912	OOCS DI 20002876.exe	chu.exe
PID 2912 wrote to memory of 220	2912	OOCS DI 20002876.exe	chu.exe
PID 2912 wrote to memory of 220	2912	OOCS DI 20002876.exe	chu.exe
PID 220 wrote to memory of 3088	220	chu.exe	cmd.exe
PID 220 wrote to memory of 3088	220	chu.exe	cmd.exe
PID 220 wrote to memory of 3088	220	chu.exe	cmd.exe
PID 3088 wrote to memory of 1224	3088	cmd.exe	reg.exe
PID 3088 wrote to memory of 1224	3088	cmd.exe	reg.exe
PID 3088 wrote to memory of 1224	3088	cmd.exe	reg.exe
PID 220 wrote to memory of 3716	220	chu.exe	InstallUtil.exe
PID 220 wrote to memory of 3716	220	chu.exe	InstallUtil.exe
PID 220 wrote to memory of 3716	220	chu.exe	InstallUtil.exe
PID 220 wrote to memory of 3716	220	chu.exe	InstallUtil.exe
PID 220 wrote to memory of 3716	220	chu.exe	InstallUtil.exe
PID 220 wrote to memory of 3716	220	chu.exe	InstallUtil.exe
PID 220 wrote to memory of 3716	220	chu.exe	InstallUtil.exe
PID 220 wrote to memory of 3716	220	chu.exe	InstallUtil.exe

C:\Users\Admin\AppData\Local\Temp\OOCS DI 20002876.exe
"C:\Users\Admin\AppData\Local\Temp\OOCS DI 20002876.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2912

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\chu.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:4484

C:\Windows\SysWOW64\reg.exe
REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\chu.exe"
3⤵
PID:4220

C:\Users\Admin\AppData\Roaming\chu.exe
"C:\Users\Admin\AppData\Roaming\chu.exe"
2⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:220

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\chu.exe"
3⤵
- Suspicious use of WriteProcessMemory
PID:3088

C:\Windows\SysWOW64\reg.exe
REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\chu.exe"
4⤵
PID:1224

C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
"C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3716

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe

Filesize
41KB

MD5
5d4073b2eb6d217c19f2b22f21bf8d57

SHA1
f0209900fbf08d004b886a0b3ba33ea2b0bf9da8

SHA256
ac1a3f21fcc88f9cee7bf51581eafba24cc76c924f0821deb2afdf1080ddf3d3

SHA512
9ac94880684933ba3407cdc135abc3047543436567af14cd9269c4adc5a6535db7b867d6de0d6238a21b94e69f9890dbb5739155871a624520623a7e56872159

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

Filesize
41KB

MD5
5d4073b2eb6d217c19f2b22f21bf8d57

SHA1
f0209900fbf08d004b886a0b3ba33ea2b0bf9da8

SHA256
ac1a3f21fcc88f9cee7bf51581eafba24cc76c924f0821deb2afdf1080ddf3d3

SHA512
9ac94880684933ba3407cdc135abc3047543436567af14cd9269c4adc5a6535db7b867d6de0d6238a21b94e69f9890dbb5739155871a624520623a7e56872159

Download Submit
C:\Users\Admin\AppData\Roaming\chu.exe

Filesize
1.4MB

MD5
27f8ea7f5eca57a8ad069629b50f942e

SHA1
2ac3264d1221cf22de0f38690dfb4bbdd2a694a1

SHA256
83b37e01d5d48f6a7bc0557863a4e91e84dfc8a1e721850ea265f78cbd6d275a

SHA512
e4dfd9a5aaab3713ca06a7d8808b3ff06c09c6c3fb101cab5d87af46a830a6447bfb66396c911e4ef3ae5fca96c60c25db633ec7f3ae09ccea22808df05d8e35

Download Submit
C:\Users\Admin\AppData\Roaming\chu.exe

Filesize
1.4MB

MD5
27f8ea7f5eca57a8ad069629b50f942e

SHA1
2ac3264d1221cf22de0f38690dfb4bbdd2a694a1

SHA256
83b37e01d5d48f6a7bc0557863a4e91e84dfc8a1e721850ea265f78cbd6d275a

SHA512
e4dfd9a5aaab3713ca06a7d8808b3ff06c09c6c3fb101cab5d87af46a830a6447bfb66396c911e4ef3ae5fca96c60c25db633ec7f3ae09ccea22808df05d8e35

Download Submit
memory/220-136-0x0000000000000000-mapping.dmp

Download
memory/1224-140-0x0000000000000000-mapping.dmp

Download
memory/2912-131-0x0000000005950000-0x0000000005EF4000-memory.dmp

Filesize
5.6MB

Download
memory/2912-132-0x0000000005480000-0x0000000005512000-memory.dmp

Filesize
584KB

Download
memory/2912-133-0x0000000005520000-0x0000000005564000-memory.dmp

Filesize
272KB

Download
memory/2912-130-0x0000000000050000-0x00000000001C2000-memory.dmp

Filesize
1.4MB

Download
memory/3088-139-0x0000000000000000-mapping.dmp

Download
memory/3716-160-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3716-172-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3716-141-0x0000000000000000-mapping.dmp

Download
memory/3716-659-0x0000000005430000-0x00000000054CC000-memory.dmp

Filesize
624KB

Download
memory/3716-146-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3716-148-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3716-150-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3716-152-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3716-154-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3716-156-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3716-158-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3716-206-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3716-162-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3716-164-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3716-166-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3716-168-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3716-170-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3716-142-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3716-174-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3716-176-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3716-178-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3716-180-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3716-182-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3716-184-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3716-186-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3716-188-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3716-190-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3716-192-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3716-194-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3716-196-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3716-198-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3716-200-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3716-202-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3716-204-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4220-135-0x0000000000000000-mapping.dmp

Download
memory/4484-134-0x0000000000000000-mapping.dmp

Download