44caliber | a02597bfc372534884c7ce8bcab08d0c09c3d52cd8eef83b9b90115bc97a402c

Analysis

max time kernel
121s
max time network
124s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
19-12-2023 17:58

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General

Target

705927ee5d2f040542d751bf7fdc9507.exe
Size

3.2MB
MD5

705927ee5d2f040542d751bf7fdc9507
SHA1

af6d69dc1f71db1a1665d9cf2f0244ba66af09f0
SHA256

a02597bfc372534884c7ce8bcab08d0c09c3d52cd8eef83b9b90115bc97a402c
SHA512

507403aa3bcdb02778e19efb3bd2b0c12bb6d2a7e0a0d86c0e09c0891e873e26551b169fc5178675fbe5e80784d07a50296d8b5719192df8847b9bf0e9644409
SSDEEP

98304:Rv2SvaBNcLJgOhxEZv140mwijiXQjv4Fg:0AyNcmsE/4hjiXQjgS

Score

10^/10

44caliber evasion spyware stealer themida trojan

Malware Config

Extracted

Family

44caliber

https://discord.com/api/webhooks/894942702326677514/imJ4lUzTMjTxjg87EEJcDzxrAj6U6amcp4yRwcfUvSVVePmrzxPj_IrqfdM_lnSBl-27

Signatures

44Caliber
An open source infostealer written in C#.
stealer 44caliber

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	705927ee5d2f040542d751bf7fdc9507.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	705927ee5d2f040542d751bf7fdc9507.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	705927ee5d2f040542d751bf7fdc9507.exe

Executes dropped EXE 1 IoCs

pid	Process
2696	Insidious.exe

Loads dropped DLL 1 IoCs

pid	Process
2436	705927ee5d2f040542d751bf7fdc9507.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
T1552.001

Themida packer 3 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral1/memory/2436-25-0x0000000000F20000-0x000000000177A000-memory.dmp	themida
behavioral1/memory/2436-26-0x0000000000F20000-0x000000000177A000-memory.dmp	themida
behavioral1/memory/2436-40-0x0000000000F20000-0x000000000177A000-memory.dmp	themida

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

Data from Local System
T1005

Credentials In Files
T1552.001

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	705927ee5d2f040542d751bf7fdc9507.exe

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
2	freegeoip.app
3	freegeoip.app

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
2436	705927ee5d2f040542d751bf7fdc9507.exe

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

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	Insidious.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	Insidious.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2696	Insidious.exe
2696	Insidious.exe
2696	Insidious.exe
2696	Insidious.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2696	Insidious.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2436 wrote to memory of 2696	2436	705927ee5d2f040542d751bf7fdc9507.exe	28
PID 2436 wrote to memory of 2696	2436	705927ee5d2f040542d751bf7fdc9507.exe	28
PID 2436 wrote to memory of 2696	2436	705927ee5d2f040542d751bf7fdc9507.exe	28
PID 2436 wrote to memory of 2696	2436	705927ee5d2f040542d751bf7fdc9507.exe	28

C:\Users\Admin\AppData\Local\Temp\705927ee5d2f040542d751bf7fdc9507.exe
"C:\Users\Admin\AppData\Local\Temp\705927ee5d2f040542d751bf7fdc9507.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Loads dropped DLL
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of WriteProcessMemory
PID:2436
- C:\Users\Admin\AppData\Local\Temp\Insidious.exe
  "C:\Users\Admin\AppData\Local\Temp\Insidious.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2696

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\44\Process.txt

Filesize
374B

MD5
7c2bc9287ccb02efb776722bfbd14621

SHA1
f2fbd0745493379f87a6b36880a5ccc50f5571ca

SHA256
23d410e3f1d4824186742f093fc7b3782a9da7f88e789a38f02c3dc935ba331c

SHA512
13e858d266135ba84d7dcc39159246fd2581c75d8b4bcc75b8ce6cecab97a7f7f87ae909cfd7b8ef8ad3c6a172373b5218c9c6470e86efb8ab00bfa6dc3bb112

Download Submit
\Users\Admin\AppData\Local\Temp\Insidious.exe

Filesize
274KB

MD5
4a951fca915ae376615cc17c71df61dc

SHA1
092835f51b923d2869bc9036b784e6c8a5ea4f4d

SHA256
7bb788f7b890c79dfb38ec37ce9fee7a9d28f3578d9a50acc28b837cf89e2092

SHA512
c09c3ea58f96d88bbb2129b91e5013e9e068a81600cc04eb839c733b9bb67746ee0d03580d48706357640c12db0e76816479576c133e99ebc129ff587292796e

Download Submit
memory/2436-18-0x0000000076400000-0x0000000076510000-memory.dmp

Filesize
1.1MB

Download
memory/2436-13-0x0000000076230000-0x0000000076277000-memory.dmp

Filesize
284KB

Download
memory/2436-6-0x0000000076400000-0x0000000076510000-memory.dmp

Filesize
1.1MB

Download
memory/2436-21-0x0000000076400000-0x0000000076510000-memory.dmp

Filesize
1.1MB

Download
memory/2436-10-0x0000000076400000-0x0000000076510000-memory.dmp

Filesize
1.1MB

Download
memory/2436-11-0x0000000076400000-0x0000000076510000-memory.dmp

Filesize
1.1MB

Download
memory/2436-12-0x0000000076400000-0x0000000076510000-memory.dmp

Filesize
1.1MB

Download
memory/2436-23-0x0000000077CD0000-0x0000000077CD2000-memory.dmp

Filesize
8KB

Download
memory/2436-15-0x0000000076400000-0x0000000076510000-memory.dmp

Filesize
1.1MB

Download
memory/2436-14-0x0000000076400000-0x0000000076510000-memory.dmp

Filesize
1.1MB

Download
memory/2436-16-0x0000000076400000-0x0000000076510000-memory.dmp

Filesize
1.1MB

Download
memory/2436-17-0x0000000076400000-0x0000000076510000-memory.dmp

Filesize
1.1MB

Download
memory/2436-20-0x0000000076400000-0x0000000076510000-memory.dmp

Filesize
1.1MB

Download
memory/2436-24-0x0000000076400000-0x0000000076510000-memory.dmp

Filesize
1.1MB

Download
memory/2436-0-0x0000000000F20000-0x000000000177A000-memory.dmp

Filesize
8.4MB

Download
memory/2436-22-0x0000000076400000-0x0000000076510000-memory.dmp

Filesize
1.1MB

Download
memory/2436-8-0x0000000076400000-0x0000000076510000-memory.dmp

Filesize
1.1MB

Download
memory/2436-3-0x0000000076400000-0x0000000076510000-memory.dmp

Filesize
1.1MB

Download
memory/2436-19-0x0000000076400000-0x0000000076510000-memory.dmp

Filesize
1.1MB

Download
memory/2436-25-0x0000000000F20000-0x000000000177A000-memory.dmp

Filesize
8.4MB

Download
memory/2436-26-0x0000000000F20000-0x000000000177A000-memory.dmp

Filesize
8.4MB

Download
memory/2436-27-0x0000000074D00000-0x00000000753EE000-memory.dmp

Filesize
6.9MB

Download
memory/2436-28-0x0000000004E90000-0x0000000004ED0000-memory.dmp

Filesize
256KB

Download
memory/2436-2-0x0000000076230000-0x0000000076277000-memory.dmp

Filesize
284KB

Download
memory/2436-38-0x0000000076230000-0x0000000076277000-memory.dmp

Filesize
284KB

Download
memory/2436-37-0x0000000076400000-0x0000000076510000-memory.dmp

Filesize
1.1MB

Download
memory/2436-39-0x0000000074D00000-0x00000000753EE000-memory.dmp

Filesize
6.9MB

Download
memory/2436-40-0x0000000000F20000-0x000000000177A000-memory.dmp

Filesize
8.4MB

Download
memory/2436-1-0x0000000076400000-0x0000000076510000-memory.dmp

Filesize
1.1MB

Download
memory/2696-42-0x000007FEF5E10000-0x000007FEF67FC000-memory.dmp

Filesize
9.9MB

Download
memory/2696-43-0x000000001B180000-0x000000001B200000-memory.dmp

Filesize
512KB

Download
memory/2696-41-0x0000000000F90000-0x0000000000FDA000-memory.dmp

Filesize
296KB

Download
memory/2696-89-0x000007FEF5E10000-0x000007FEF67FC000-memory.dmp

Filesize
9.9MB

Download