14dc380896e6d3631ced48498b0d552c9b0585764fdd666bf26bb7d8fca15eaf

General

Target

steamerrorreporter.exe
Size

560KB
MD5

dc1681b98049f1df46dd10d7f4c26045
SHA1

4c7f5cf7c00b6139979f8aa41f46979666369224
SHA256

594f9853124e0a81deeaaecb8ec3d192169e7393778214ef6d8f6460450ef080
SHA512

c9a2086326acbab8aba801da0d8bd2aa06951ec7fd7f32a3150f9521498c0b6711552695fbf9d0de7668503630c508bcd68e1d715796ef34f9945035da3fe1ed
SSDEEP

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

Score

5^/10

discovery

Malware Config

Signatures

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2492 set thread context of 4540	2492	steamerrorreporter.exe	84

Executes dropped EXE 1 IoCs

pid	Process
2492	steamerrorreporter.exe

Loads dropped DLL 3 IoCs

pid	Process
2492	steamerrorreporter.exe
2492	steamerrorreporter.exe
2492	steamerrorreporter.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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	explorer.exe
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

GoLang User-Agent 1 IoCs

Uses default user-agent string defined by GoLang HTTP packages.

description	flow	ioc
HTTP User-Agent header	32	Go-http-client/1.1

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
5080	steamerrorreporter.exe
2492	steamerrorreporter.exe
2492	steamerrorreporter.exe
4540	cmd.exe
4540	cmd.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
2492	steamerrorreporter.exe
4540	cmd.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 5080 wrote to memory of 2492	5080	steamerrorreporter.exe	83
PID 5080 wrote to memory of 2492	5080	steamerrorreporter.exe	83
PID 5080 wrote to memory of 2492	5080	steamerrorreporter.exe	83
PID 2492 wrote to memory of 4540	2492	steamerrorreporter.exe	84
PID 2492 wrote to memory of 4540	2492	steamerrorreporter.exe	84
PID 2492 wrote to memory of 4540	2492	steamerrorreporter.exe	84
PID 2492 wrote to memory of 4540	2492	steamerrorreporter.exe	84
PID 4540 wrote to memory of 3544	4540	cmd.exe	90
PID 4540 wrote to memory of 3544	4540	cmd.exe	90
PID 4540 wrote to memory of 3544	4540	cmd.exe	90
PID 4540 wrote to memory of 3544	4540	cmd.exe	90
PID 4540 wrote to memory of 3544	4540	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:5080
- C:\Users\Admin\AppData\Roaming\Notepadsystem_v5\steamerrorreporter.exe
  C:\Users\Admin\AppData\Roaming\Notepadsystem_v5\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:2492
- - 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:4540
  - - C:\Windows\SysWOW64\explorer.exe
      C:\Windows\SysWOW64\explorer.exe
      4⤵
      System Location Discovery: System Language Discovery
      PID:3544

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

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\e66bf135

Filesize
8.0MB

MD5
31d12179fdf635a0e0a967b688f89280

SHA1
9422f50b7f934e18f63372056d564e8d51d9263f

SHA256
b9dea531104cf82d517f1a11f401f16318d4e2fd5ef0822cbc6b410770ff6be0

SHA512
e3186a5214070750a84726f39f3f62067652c716501c8698c6ae2b5fe1eee2cb2e4f72a0a5c0465fff682896959606eab86d633418ad8e343ab1d0639666ebcd

Download Submit
C:\Users\Admin\AppData\Roaming\Notepadsystem_v5\aesc.mov

Filesize
38KB

MD5
ba1411d5b561b92adefa48aaca564e47

SHA1
05f4abb6396388f904efeb6ae4c647ee6e701483

SHA256
5091d9b372b2dd4550cf2b14be4372792509b5c606449e73d487213d6e7402bf

SHA512
437db6fbb612369be7423f6e8c6ab0ba543cc6d3dcc5fd33e5aa26808bf5abfbb5eec12f1af2b8c5b5aca5ba8560fe441eb43270e1acc740ba03e9ef52d36aa6

Download Submit
C:\Users\Admin\AppData\Roaming\Notepadsystem_v5\curette.ics

Filesize
7.4MB

MD5
fd1b3017c49f0b6f896e135f8061fe5c

SHA1
1719528119548a352ebd7e44363ed7c93588e04b

SHA256
6af0a5dde52cff22980decdc050520213af54b88e9985b501d37fc821ac4ce7c

SHA512
f1f769947fea5111a93c4e456decabae343d209b3e99ff1ca9e261e9e8cf4c1682b9e0f80f3de4cd4d4e5c75f171e98298f7afdf89ece4ce5ac76b040dacc7b5

Download Submit
C:\Users\Admin\AppData\Roaming\Notepadsystem_v5\steamerrorreporter.exe

Filesize
560KB

MD5
dc1681b98049f1df46dd10d7f4c26045

SHA1
4c7f5cf7c00b6139979f8aa41f46979666369224

SHA256
594f9853124e0a81deeaaecb8ec3d192169e7393778214ef6d8f6460450ef080

SHA512
c9a2086326acbab8aba801da0d8bd2aa06951ec7fd7f32a3150f9521498c0b6711552695fbf9d0de7668503630c508bcd68e1d715796ef34f9945035da3fe1ed

Download Submit
C:\Users\Admin\AppData\Roaming\Notepadsystem_v5\tier0_s.dll

Filesize
341KB

MD5
884013332bf332e4dd8cbf0109a8cfeb

SHA1
c01789d661d465ca29d20174d8f5d29afb1fcffa

SHA256
8ed104f6d7a50f95d515005bf6bd5569cd2dc0107119aa3d91e21dd7ba777e98

SHA512
ea18f416b1295edcfc197c685d56030246097bf95ffffa46f13a16753d05d95a1adb83b5ba0669eaa1049856ea2486ca0fc49507df7d41572de80701e9852f64

Download Submit
C:\Users\Admin\AppData\Roaming\Notepadsystem_v5\vstdlib_s.dll

Filesize
519KB

MD5
464b80302d3e5f1a12030f2afd15e8c0

SHA1
fa4a9d98b5272f3d1110188b53264b03134f1bcd

SHA256
954ecb7e90993cf1e3d426a00512f0591a0c385d986db7b923b872289a659ed9

SHA512
03686460522be3f830142c95b86dbaa686888a1fd22dc218ef6f0a6e1b7b1f8d65444b47d909c09348c6fa003d5f000998f640524aa001d719f4381c78e004d1

Download Submit
memory/2492-20-0x0000000074900000-0x0000000074A7B000-memory.dmp

Filesize
1.5MB

Download
memory/2492-16-0x0000000074900000-0x0000000074A7B000-memory.dmp

Filesize
1.5MB

Download
memory/2492-17-0x00007FFC4E310000-0x00007FFC4E505000-memory.dmp

Filesize
2.0MB

Download
memory/2492-19-0x0000000074900000-0x0000000074A7B000-memory.dmp

Filesize
1.5MB

Download
memory/2492-18-0x0000000074913000-0x0000000074915000-memory.dmp

Filesize
8KB

Download
memory/3544-38-0x0000000000C10000-0x000000000139E000-memory.dmp

Filesize
7.6MB

Download
memory/3544-46-0x0000000000C10000-0x000000000139E000-memory.dmp

Filesize
7.6MB

Download
memory/3544-64-0x0000000000C10000-0x000000000139E000-memory.dmp

Filesize
7.6MB

Download
memory/3544-63-0x0000000000C10000-0x000000000139E000-memory.dmp

Filesize
7.6MB

Download
memory/3544-62-0x0000000000C10000-0x000000000139E000-memory.dmp

Filesize
7.6MB

Download
memory/3544-60-0x0000000000C10000-0x000000000139E000-memory.dmp

Filesize
7.6MB

Download
memory/3544-59-0x0000000000C10000-0x000000000139E000-memory.dmp

Filesize
7.6MB

Download
memory/3544-34-0x0000000000C10000-0x000000000139E000-memory.dmp

Filesize
7.6MB

Download
memory/3544-36-0x00007FFC4E310000-0x00007FFC4E505000-memory.dmp

Filesize
2.0MB

Download
memory/3544-58-0x0000000000C10000-0x000000000139E000-memory.dmp

Filesize
7.6MB

Download
memory/3544-40-0x0000000000C10000-0x000000000139E000-memory.dmp

Filesize
7.6MB

Download
memory/3544-41-0x0000000000C10000-0x000000000139E000-memory.dmp

Filesize
7.6MB

Download
memory/3544-42-0x0000000000C10000-0x000000000139E000-memory.dmp

Filesize
7.6MB

Download
memory/3544-44-0x0000000000C10000-0x000000000139E000-memory.dmp

Filesize
7.6MB

Download
memory/3544-45-0x0000000000C10000-0x000000000139E000-memory.dmp

Filesize
7.6MB

Download
memory/3544-57-0x0000000000C10000-0x000000000139E000-memory.dmp

Filesize
7.6MB

Download
memory/3544-47-0x0000000000C10000-0x000000000139E000-memory.dmp

Filesize
7.6MB

Download
memory/3544-48-0x0000000000C10000-0x000000000139E000-memory.dmp

Filesize
7.6MB

Download
memory/3544-50-0x0000000000C10000-0x000000000139E000-memory.dmp

Filesize
7.6MB

Download
memory/3544-51-0x0000000000C10000-0x000000000139E000-memory.dmp

Filesize
7.6MB

Download
memory/3544-52-0x0000000000C10000-0x000000000139E000-memory.dmp

Filesize
7.6MB

Download
memory/3544-53-0x0000000000C10000-0x000000000139E000-memory.dmp

Filesize
7.6MB

Download
memory/3544-54-0x0000000000C10000-0x000000000139E000-memory.dmp

Filesize
7.6MB

Download
memory/3544-56-0x0000000000C10000-0x000000000139E000-memory.dmp

Filesize
7.6MB

Download
memory/4540-22-0x0000000074900000-0x0000000074A7B000-memory.dmp

Filesize
1.5MB

Download
memory/4540-33-0x0000000074900000-0x0000000074A7B000-memory.dmp

Filesize
1.5MB

Download
memory/4540-28-0x0000000074900000-0x0000000074A7B000-memory.dmp

Filesize
1.5MB

Download
memory/4540-29-0x0000000074900000-0x0000000074A7B000-memory.dmp

Filesize
1.5MB

Download
memory/4540-24-0x00007FFC4E310000-0x00007FFC4E505000-memory.dmp

Filesize
2.0MB

Download
memory/5080-0-0x0000000074900000-0x0000000074A7B000-memory.dmp

Filesize
1.5MB

Download
memory/5080-1-0x00007FFC4E310000-0x00007FFC4E505000-memory.dmp

Filesize
2.0MB

Download

Analysis

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