lumma | aa86c065eb6782b94d0ed16ad51a1d042db48e0acc3b7891a205d98135d43bda

General

Target

steamerrorreporter.exe
Size

560KB
MD5

dc1681b98049f1df46dd10d7f4c26045
SHA1

4c7f5cf7c00b6139979f8aa41f46979666369224
SHA256

594f9853124e0a81deeaaecb8ec3d192169e7393778214ef6d8f6460450ef080
SHA512

c9a2086326acbab8aba801da0d8bd2aa06951ec7fd7f32a3150f9521498c0b6711552695fbf9d0de7668503630c508bcd68e1d715796ef34f9945035da3fe1ed
SSDEEP

6144:mOzBfFojwX0v4KU9DJZ10Bwr/RvTuZjOULXAO99cER0u+GIIIIIIIhIIIIIIIIIZ:mONFX0v4KU9DJZ16wr/MHVm5a0dw/D

Score

10^/10

lumma discovery stealer

Malware Config

Extracted

Family

lumma

C2

https://impresnyb.cyou/api

Signatures

Lumma Stealer, LummaC
Lumma or LummaC is an infostealer written in C++ first seen in August 2022.
stealer lumma
Lumma family
lumma

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2224 set thread context of 4712	2224	steamerrorreporter.exe	83

Executes dropped EXE 1 IoCs

pid	Process
2224	steamerrorreporter.exe

Loads dropped DLL 3 IoCs

pid	Process
2224	steamerrorreporter.exe
2224	steamerrorreporter.exe
2224	steamerrorreporter.exe

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	steamerrorreporter.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	steamerrorreporter.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
4104	steamerrorreporter.exe
2224	steamerrorreporter.exe
2224	steamerrorreporter.exe
4712	cmd.exe
4712	cmd.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
2224	steamerrorreporter.exe
4712	cmd.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4104 wrote to memory of 2224	4104	steamerrorreporter.exe	82
PID 4104 wrote to memory of 2224	4104	steamerrorreporter.exe	82
PID 4104 wrote to memory of 2224	4104	steamerrorreporter.exe	82
PID 2224 wrote to memory of 4712	2224	steamerrorreporter.exe	83
PID 2224 wrote to memory of 4712	2224	steamerrorreporter.exe	83
PID 2224 wrote to memory of 4712	2224	steamerrorreporter.exe	83
PID 2224 wrote to memory of 4712	2224	steamerrorreporter.exe	83
PID 4712 wrote to memory of 5044	4712	cmd.exe	90
PID 4712 wrote to memory of 5044	4712	cmd.exe	90
PID 4712 wrote to memory of 5044	4712	cmd.exe	90
PID 4712 wrote to memory of 5044	4712	cmd.exe	90
PID 4712 wrote to memory of 5044	4712	cmd.exe	90

C:\Users\Admin\AppData\Local\Temp\steamerrorreporter.exe
"C:\Users\Admin\AppData\Local\Temp\steamerrorreporter.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4104
- C:\Users\Admin\AppData\Roaming\UninstallPluginME\steamerrorreporter.exe
  C:\Users\Admin\AppData\Roaming\UninstallPluginME\steamerrorreporter.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:2224
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\SysWOW64\cmd.exe
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:4712
  - - C:\Windows\SysWOW64\explorer.exe
      C:\Windows\SysWOW64\explorer.exe
      4⤵
      System Location Discovery: System Language Discovery
      PID:5044

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\4b74307a

Filesize
1.0MB

MD5
1f2464949af884ac589a03d6fda1b9db

SHA1
675834d12522e0ebf63c352d0a0fb4b2b995bcf8

SHA256
89d0b40f6af03649b7410781d7925102be2e36b4346fe448adda4d52f1f8be0c

SHA512
705042234e7f7f4014743b07838251acf0d018a3c3a2cea02c5062f8a4ad7d8fb86a8420dbd8047dfc3a611c579b0cf7e821b3190e1293d86329ef205eb52cae

Download Submit
C:\Users\Admin\AppData\Roaming\UninstallPluginME\aesc.mov

Filesize
38KB

MD5
ba1411d5b561b92adefa48aaca564e47

SHA1
05f4abb6396388f904efeb6ae4c647ee6e701483

SHA256
5091d9b372b2dd4550cf2b14be4372792509b5c606449e73d487213d6e7402bf

SHA512
437db6fbb612369be7423f6e8c6ab0ba543cc6d3dcc5fd33e5aa26808bf5abfbb5eec12f1af2b8c5b5aca5ba8560fe441eb43270e1acc740ba03e9ef52d36aa6

Download Submit
C:\Users\Admin\AppData\Roaming\UninstallPluginME\curette.ics

Filesize
783KB

MD5
b117d9e0270a6c06ea7a06d905e6c03e

SHA1
ca59e78905803706eb9f310ab80df2ab0be29cd9

SHA256
bcc4db20cb7fa0b9089d1b9dccc6125279629a358b7613365ad5cd53dfb0910a

SHA512
f5158226871453962f51525a437d71fe73862d8a63458bac8a0c5ab66139132c62efcdffb9eea42f933bcb763a4d49d4af3783f8cd1501219137ba7941ffc67e

Download Submit
C:\Users\Admin\AppData\Roaming\UninstallPluginME\steamerrorreporter.exe

Filesize
560KB

MD5
dc1681b98049f1df46dd10d7f4c26045

SHA1
4c7f5cf7c00b6139979f8aa41f46979666369224

SHA256
594f9853124e0a81deeaaecb8ec3d192169e7393778214ef6d8f6460450ef080

SHA512
c9a2086326acbab8aba801da0d8bd2aa06951ec7fd7f32a3150f9521498c0b6711552695fbf9d0de7668503630c508bcd68e1d715796ef34f9945035da3fe1ed

Download Submit
C:\Users\Admin\AppData\Roaming\UninstallPluginME\tier0_s.dll

Filesize
341KB

MD5
884013332bf332e4dd8cbf0109a8cfeb

SHA1
c01789d661d465ca29d20174d8f5d29afb1fcffa

SHA256
8ed104f6d7a50f95d515005bf6bd5569cd2dc0107119aa3d91e21dd7ba777e98

SHA512
ea18f416b1295edcfc197c685d56030246097bf95ffffa46f13a16753d05d95a1adb83b5ba0669eaa1049856ea2486ca0fc49507df7d41572de80701e9852f64

Download Submit
C:\Users\Admin\AppData\Roaming\UninstallPluginME\vstdlib_s.dll

Filesize
519KB

MD5
464b80302d3e5f1a12030f2afd15e8c0

SHA1
fa4a9d98b5272f3d1110188b53264b03134f1bcd

SHA256
954ecb7e90993cf1e3d426a00512f0591a0c385d986db7b923b872289a659ed9

SHA512
03686460522be3f830142c95b86dbaa686888a1fd22dc218ef6f0a6e1b7b1f8d65444b47d909c09348c6fa003d5f000998f640524aa001d719f4381c78e004d1

Download Submit
memory/2224-19-0x0000000074A50000-0x0000000074BCB000-memory.dmp

Filesize
1.5MB

Download
memory/2224-20-0x0000000074A50000-0x0000000074BCB000-memory.dmp

Filesize
1.5MB

Download
memory/2224-17-0x00007FF898810000-0x00007FF898A05000-memory.dmp

Filesize
2.0MB

Download
memory/2224-18-0x0000000074A63000-0x0000000074A65000-memory.dmp

Filesize
8KB

Download
memory/2224-16-0x0000000074A50000-0x0000000074BCB000-memory.dmp

Filesize
1.5MB

Download
memory/4104-1-0x00007FF898810000-0x00007FF898A05000-memory.dmp

Filesize
2.0MB

Download
memory/4104-0-0x0000000074920000-0x0000000074A9B000-memory.dmp

Filesize
1.5MB

Download
memory/4712-22-0x0000000074A50000-0x0000000074BCB000-memory.dmp

Filesize
1.5MB

Download
memory/4712-24-0x00007FF898810000-0x00007FF898A05000-memory.dmp

Filesize
2.0MB

Download
memory/4712-25-0x0000000074A50000-0x0000000074BCB000-memory.dmp

Filesize
1.5MB

Download
memory/4712-26-0x0000000074A50000-0x0000000074BCB000-memory.dmp

Filesize
1.5MB

Download
memory/4712-30-0x0000000074A50000-0x0000000074BCB000-memory.dmp

Filesize
1.5MB

Download
memory/5044-31-0x00007FF898810000-0x00007FF898A05000-memory.dmp

Filesize
2.0MB

Download
memory/5044-32-0x0000000000AE0000-0x0000000000B38000-memory.dmp

Filesize
352KB

Download

Analysis

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