a310logger | 7fdb072b859acf022effc3f1033b96b2c7f90faaecac8352c3e39db31c53cdaf

Analysis

max time kernel
120s
max time network
53s
platform
windows7_x64
resource
win7v20210408
submitted
12-07-2021 12:21

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General

Target

87482.xlsx
Size

1.1MB
MD5

691c1f98e15a9adfad552d13a383900c
SHA1

b8b48ea114731bbe1f93074c5e57a7dc877aab36
SHA256

7fdb072b859acf022effc3f1033b96b2c7f90faaecac8352c3e39db31c53cdaf
SHA512

3ca064d10d8884014c4e56ef542a93afb8a0f1904323a26ac1f006007e74a5ff2414ace9df1bd8025113e87a3872a53f6dd22a893b1787cb666d28b255891fe5

Score

10^/10

a310logger stormkitty spyware stealer

Malware Config

Signatures

A310logger
A310 Logger is a .NET stealer/logger targeting passwords from browsers and email clients.
stealer spyware a310logger
StormKitty
StormKitty is an open source info stealer written in C#.
stealer stormkitty

StormKitty Payload 3 IoCs

resource	yara_rule
behavioral1/files/0x000300000001314a-90.dat	family_stormkitty
behavioral1/files/0x000300000001314a-92.dat	family_stormkitty
behavioral1/files/0x000300000001314a-93.dat	family_stormkitty

A310logger Executable 3 IoCs

resource	yara_rule
behavioral1/files/0x000300000001314a-90.dat	a310logger
behavioral1/files/0x000300000001314a-92.dat	a310logger
behavioral1/files/0x000300000001314a-93.dat	a310logger

Blocklisted process makes network request 1 IoCs

flow	pid	Process
6	1780	EQNEDT32.EXE

Downloads MZ/PE file

Executes dropped EXE 6 IoCs

pid	Process
1612	vbc.exe
1096	vbc.exe
1844	vbc.exe
1596	PASSWORDSNET4.exe
1672	CREDITCARDNET4.exe
1740	CONTACTSNET4.exe

Loads dropped DLL 7 IoCs

pid	Process
1780	EQNEDT32.EXE
1780	EQNEDT32.EXE
1780	EQNEDT32.EXE
1780	EQNEDT32.EXE
1844	vbc.exe
1844	vbc.exe
1844	vbc.exe

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
T1081
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1612 set thread context of 1844	1612	vbc.exe	35

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

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	PASSWORDSNET4.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	PASSWORDSNET4.exe

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor	EXCEL.EXE

Launches Equation Editor 1 TTPs 1 IoCs

Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

exploit

Exploitation for Client Execution

T1203

pid	Process
1780	EQNEDT32.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1936	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1612	vbc.exe
1612	vbc.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1844	vbc.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1612	vbc.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
1936	EXCEL.EXE
1936	EXCEL.EXE
1936	EXCEL.EXE
1844	vbc.exe

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 1780 wrote to memory of 1612	1780	EQNEDT32.EXE	32
PID 1780 wrote to memory of 1612	1780	EQNEDT32.EXE	32
PID 1780 wrote to memory of 1612	1780	EQNEDT32.EXE	32
PID 1780 wrote to memory of 1612	1780	EQNEDT32.EXE	32
PID 1612 wrote to memory of 1096	1612	vbc.exe	34
PID 1612 wrote to memory of 1096	1612	vbc.exe	34
PID 1612 wrote to memory of 1096	1612	vbc.exe	34
PID 1612 wrote to memory of 1096	1612	vbc.exe	34
PID 1612 wrote to memory of 1844	1612	vbc.exe	35
PID 1612 wrote to memory of 1844	1612	vbc.exe	35
PID 1612 wrote to memory of 1844	1612	vbc.exe	35
PID 1612 wrote to memory of 1844	1612	vbc.exe	35
PID 1612 wrote to memory of 1844	1612	vbc.exe	35
PID 1612 wrote to memory of 1844	1612	vbc.exe	35
PID 1612 wrote to memory of 1844	1612	vbc.exe	35
PID 1612 wrote to memory of 1844	1612	vbc.exe	35
PID 1612 wrote to memory of 1844	1612	vbc.exe	35
PID 1844 wrote to memory of 1596	1844	vbc.exe	36
PID 1844 wrote to memory of 1596	1844	vbc.exe	36
PID 1844 wrote to memory of 1596	1844	vbc.exe	36
PID 1844 wrote to memory of 1596	1844	vbc.exe	36
PID 1844 wrote to memory of 1672	1844	vbc.exe	38
PID 1844 wrote to memory of 1672	1844	vbc.exe	38
PID 1844 wrote to memory of 1672	1844	vbc.exe	38
PID 1844 wrote to memory of 1672	1844	vbc.exe	38
PID 1844 wrote to memory of 1740	1844	vbc.exe	39
PID 1844 wrote to memory of 1740	1844	vbc.exe	39
PID 1844 wrote to memory of 1740	1844	vbc.exe	39
PID 1844 wrote to memory of 1740	1844	vbc.exe	39

C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\87482.xlsx
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:1936

C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
"C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
1⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Launches Equation Editor
- Suspicious use of WriteProcessMemory
PID:1780
- C:\Users\Public\vbc.exe
  "C:\Users\Public\vbc.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1612
- - C:\Users\Public\vbc.exe
    "C:\Users\Public\vbc.exe"
    3⤵
    - Executes dropped EXE
    PID:1096
- - C:\Users\Public\vbc.exe
    "C:\Users\Public\vbc.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1844
  - - C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\PASSWORDSNET4.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\PASSWORDSNET4.exe
      4⤵
      Executes dropped EXE
      Checks processor information in registry
      PID:1596
  - - C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\CREDITCARDNET4.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\CREDITCARDNET4.exe
      4⤵
      Executes dropped EXE
      PID:1672
  - - C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\CONTACTSNET4.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\CONTACTSNET4.exe
      4⤵
      Executes dropped EXE
      PID:1740

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Exploitation for Client Execution

T1203

Scripting

T1064

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Scripting

T1064

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1596-94-0x0000000000870000-0x0000000000871000-memory.dmp

Filesize
4KB

Download
memory/1612-71-0x0000000000D20000-0x0000000000D21000-memory.dmp

Filesize
4KB

Download
memory/1612-82-0x0000000000950000-0x00000000009A3000-memory.dmp

Filesize
332KB

Download
memory/1612-81-0x0000000006EB0000-0x0000000006F44000-memory.dmp

Filesize
592KB

Download
memory/1612-80-0x0000000000220000-0x0000000000230000-memory.dmp

Filesize
64KB

Download
memory/1612-73-0x0000000004E80000-0x0000000004E81000-memory.dmp

Filesize
4KB

Download
memory/1672-101-0x0000000000210000-0x0000000000211000-memory.dmp

Filesize
4KB

Download
memory/1740-107-0x0000000000910000-0x0000000000911000-memory.dmp

Filesize
4KB

Download
memory/1780-63-0x0000000075201000-0x0000000075203000-memory.dmp

Filesize
8KB

Download
memory/1844-96-0x00000000002B0000-0x00000000002B2000-memory.dmp

Filesize
8KB

Download
memory/1844-84-0x0000000000400000-0x000000000044D000-memory.dmp

Filesize
308KB

Download
memory/1936-75-0x0000000005B03000-0x0000000005B05000-memory.dmp

Filesize
8KB

Download
memory/1936-76-0x0000000005B05000-0x0000000005B06000-memory.dmp

Filesize
4KB

Download
memory/1936-77-0x0000000005B06000-0x0000000005B08000-memory.dmp

Filesize
8KB

Download
memory/1936-60-0x000000002F771000-0x000000002F774000-memory.dmp

Filesize
12KB

Download
memory/1936-78-0x0000000005B08000-0x0000000005B0A000-memory.dmp

Filesize
8KB

Download
memory/1936-79-0x0000000005B0A000-0x0000000005B0D000-memory.dmp

Filesize
12KB

Download
memory/1936-74-0x0000000005B00000-0x0000000005B03000-memory.dmp

Filesize
12KB

Download
memory/1936-62-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1936-109-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1936-61-0x00000000714F1000-0x00000000714F3000-memory.dmp

Filesize
8KB

Download