a310logger | fdb6b5f3b83553b83111bd61152a4c4bd29996d778d6c118f52f01abd9435fe5

General

Target

b44f95c332073b28fe95157f470f8f2a.exe
Size

1.0MB
MD5

b44f95c332073b28fe95157f470f8f2a
SHA1

ab9265412559d4992d540aa11f05d73e4f544374
SHA256

fdb6b5f3b83553b83111bd61152a4c4bd29996d778d6c118f52f01abd9435fe5
SHA512

25bd35d5bd9d233d9f0bc21afa1af51c2326a252d3afe16f65a22f17ec85bd7a73529b24f4408d20aa0aec84dc79339574f4e57f1876f480bbb6b23cc5aa8f4d
SSDEEP

24576:TqLcMNjfhbU37ea2y1c+ExsjMW/GpsPzKnWjT9:QFhfhYa1yes4vqmnWv

Score

10^/10

a310logger blustealer collection spyware stealer

Malware Config

Extracted

Family

blustealer

C2

https://api.telegram.org/bot1945669405:AAEo5Zfx9GfeIsr07vB55CuJD00-glDv8-w/sendMessage?chat_id=1890833638

Signatures

A310logger
A310 Logger is a .NET stealer/logger targeting passwords from browsers and email clients.
stealer spyware a310logger
BluStealer
A Modular information stealer written in Visual Basic.
stealer blustealer

A310logger Executable 2 IoCs

resource	yara_rule
behavioral2/files/0x0007000000023389-47.dat	a310logger
behavioral2/memory/3612-49-0x00000000001A0000-0x0000000000252000-memory.dmp	a310logger

Executes dropped EXE 1 IoCs

pid	Process
3612	Fox.exe

Reads WinSCP keys stored on the system 2 TTPs
Tries to access WinSCP stored sessions.
spyware stealer

Data from Local System
T1005

Credentials in Registry
T1552.002
Reads local data of messenger clients 2 TTPs
Infostealers often target stored data of messaging applications, which can include saved credentials and account information.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Fox.exe
Key opened	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Fox.exe
Key opened	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Fox.exe

Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials In Files
T1552.001

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4440 set thread context of 872	4440	b44f95c332073b28fe95157f470f8f2a.exe	109

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

System Information Discovery
T1082

Script User-Agent 1 IoCs

Uses user-agent string associated with script host/environment.

description	flow	ioc
HTTP User-Agent header	149	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4440	b44f95c332073b28fe95157f470f8f2a.exe
4440	b44f95c332073b28fe95157f470f8f2a.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
872	b44f95c332073b28fe95157f470f8f2a.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4440	b44f95c332073b28fe95157f470f8f2a.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
872	b44f95c332073b28fe95157f470f8f2a.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 4440 wrote to memory of 2876	4440	b44f95c332073b28fe95157f470f8f2a.exe	108
PID 4440 wrote to memory of 2876	4440	b44f95c332073b28fe95157f470f8f2a.exe	108
PID 4440 wrote to memory of 2876	4440	b44f95c332073b28fe95157f470f8f2a.exe	108
PID 4440 wrote to memory of 872	4440	b44f95c332073b28fe95157f470f8f2a.exe	109
PID 4440 wrote to memory of 872	4440	b44f95c332073b28fe95157f470f8f2a.exe	109
PID 4440 wrote to memory of 872	4440	b44f95c332073b28fe95157f470f8f2a.exe	109
PID 4440 wrote to memory of 872	4440	b44f95c332073b28fe95157f470f8f2a.exe	109
PID 4440 wrote to memory of 872	4440	b44f95c332073b28fe95157f470f8f2a.exe	109
PID 4440 wrote to memory of 872	4440	b44f95c332073b28fe95157f470f8f2a.exe	109
PID 4440 wrote to memory of 872	4440	b44f95c332073b28fe95157f470f8f2a.exe	109
PID 4440 wrote to memory of 872	4440	b44f95c332073b28fe95157f470f8f2a.exe	109
PID 872 wrote to memory of 3612	872	b44f95c332073b28fe95157f470f8f2a.exe	112
PID 872 wrote to memory of 3612	872	b44f95c332073b28fe95157f470f8f2a.exe	112

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Fox.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Fox.exe

C:\Users\Admin\AppData\Local\Temp\b44f95c332073b28fe95157f470f8f2a.exe
"C:\Users\Admin\AppData\Local\Temp\b44f95c332073b28fe95157f470f8f2a.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4440
- C:\Users\Admin\AppData\Local\Temp\b44f95c332073b28fe95157f470f8f2a.exe
  "C:\Users\Admin\AppData\Local\Temp\b44f95c332073b28fe95157f470f8f2a.exe"
  2⤵
  PID:2876
- C:\Users\Admin\AppData\Local\Temp\b44f95c332073b28fe95157f470f8f2a.exe
  "C:\Users\Admin\AppData\Local\Temp\b44f95c332073b28fe95157f470f8f2a.exe"
  2⤵
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:872
- - C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\Fox.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\Fox.exe
    3⤵
    - Executes dropped EXE
    - Accesses Microsoft Outlook profiles
    - outlook_office_path
    - outlook_win_path
    PID:3612

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3612 --field-trial-handle=2284,i,9807419199535700662,2319175108930815708,262144 --variations-seed-version /prefetch:8
1⤵
PID:4784

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

4

T1552

Credentials In Files

3

T1552.001

Credentials in Registry

1

T1552.002

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\IIU8IBF3L9.zip

Filesize
285KB

MD5
40a9752d59f2883e40d928f85a749008

SHA1
c60fb58eff64a7969b46f3934766f991352eeb47

SHA256
ef95540ec8dae3d255439fb847d26397c265b5cccda5ed0d6b9ed3dda14a2820

SHA512
ce33985f91103315accb1039635488d7e144df264bab8e164c1f9844ce6923e1c9c76349f14542901887ffcbbbca40b92cf474126f0b94893e8af1f608464b3c

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\Fox.exe

Filesize
689KB

MD5
91b41651e6e9ab352805c6d35a297d08

SHA1
11b8eaa7b7941461bc952b11ec3f07d25dcd1c2e

SHA256
0872abe29cc9231cdded3a44e02a7ea17f09cf2ac2bdbd7077065858829c3723

SHA512
b0b0d73f6ac7b6e9b39db0fa58931873143f6559c3b8d3db2d82d453045f75da94f3236b6c6c5200b52af6cacc038565eb2e9c6a834608dac0b0e8bb45b1e892

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\credentials.txt

Filesize
691B

MD5
055c857272026583a61e1b5821c69a24

SHA1
ec39d34f16487682801dd2b319554cbed57feca4

SHA256
190db16bb64995e3bdea04b9e6fc1994dacfea3253a7559732205b1d41362b84

SHA512
d7833c4651683e95959107e05b07b60d2e963b9fbecd0106b329e2087d1dfc9aedb962b334e22b6b462699cbce86097d4d50ce5d1310ad098e3531efaa4e204b

Download Submit
memory/872-13-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/872-62-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/872-16-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/3612-59-0x00007FFE5D6E0000-0x00007FFE5E1A1000-memory.dmp

Filesize
10.8MB

Download
memory/3612-51-0x0000000002470000-0x0000000002480000-memory.dmp

Filesize
64KB

Download
memory/3612-50-0x00007FFE5D6E0000-0x00007FFE5E1A1000-memory.dmp

Filesize
10.8MB

Download
memory/3612-49-0x00000000001A0000-0x0000000000252000-memory.dmp

Filesize
712KB

Download
memory/4440-6-0x0000000005AA0000-0x0000000005AAA000-memory.dmp

Filesize
40KB

Download
memory/4440-7-0x0000000005E30000-0x0000000005E4A000-memory.dmp

Filesize
104KB

Download
memory/4440-12-0x0000000009D70000-0x0000000009DD6000-memory.dmp

Filesize
408KB

Download
memory/4440-10-0x0000000005DB0000-0x0000000005DC0000-memory.dmp

Filesize
64KB

Download
memory/4440-9-0x0000000074A40000-0x00000000751F0000-memory.dmp

Filesize
7.7MB

Download
memory/4440-19-0x0000000074A40000-0x00000000751F0000-memory.dmp

Filesize
7.7MB

Download
memory/4440-8-0x00000000071F0000-0x0000000007544000-memory.dmp

Filesize
3.3MB

Download
memory/4440-11-0x00000000076C0000-0x0000000007790000-memory.dmp

Filesize
832KB

Download
memory/4440-0-0x0000000074A40000-0x00000000751F0000-memory.dmp

Filesize
7.7MB

Download
memory/4440-5-0x0000000005DB0000-0x0000000005DC0000-memory.dmp

Filesize
64KB

Download
memory/4440-4-0x0000000005B60000-0x0000000005BFC000-memory.dmp

Filesize
624KB

Download
memory/4440-3-0x0000000005AC0000-0x0000000005B52000-memory.dmp

Filesize
584KB

Download
memory/4440-2-0x0000000005FD0000-0x0000000006574000-memory.dmp

Filesize
5.6MB

Download
memory/4440-1-0x0000000000F90000-0x0000000001098000-memory.dmp

Filesize
1.0MB

Download

Analysis

Sharing