44caliber | a2119eeffe066d388268d02e56303423b8ec267efae306609c1b316dc0c04cab

Analysis

max time kernel
118s
max time network
119s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
15-01-2024 22:18

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General

Target

5e3b448a401c6b9662d1e3d0d5cb2143.exe
Size

2.7MB
MD5

5e3b448a401c6b9662d1e3d0d5cb2143
SHA1

f290401040a78886975024e54b9e53d20169563d
SHA256

a2119eeffe066d388268d02e56303423b8ec267efae306609c1b316dc0c04cab
SHA512

677aba5e6ec76d3e21242638b0f31eb5ff4351c7fa14676d0ed87ac8c999552ef02de7423e5acd8bbdc9d43fcd45ff1330151d29f685ef0319e038d63dbd4cba
SSDEEP

49152:Izosmx2LWrn4StMIlux28xPmXtNMGi72arIPR5pl20hukH5jE9PlU/goROD+e8WD:zZnr4yRl6xPmXtNML7zA12OFHMNU/bRW

Score

10^/10

44caliber echelon evasion spyware stealer themida trojan

Malware Config

Extracted

Family

44caliber

https://discord.com/api/webhooks/877099784312328213/gbN3AhFr-HwOYeSmi-AjLnTIHhnG8GV5LfjEhIncHO-_rtFM2jafytOi5GkZCyhMgXTd

Signatures

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

Detects Echelon Stealer payload 5 IoCs

Processes:

resource	yara_rule
behavioral1/files/0x000b000000014ab5-14.dat	family_echelon
behavioral1/files/0x000b000000014ab5-12.dat	family_echelon
behavioral1/files/0x000b000000014ab5-15.dat	family_echelon
behavioral1/memory/2752-18-0x0000000000050000-0x00000000000E8000-memory.dmp	family_echelon
behavioral1/memory/2752-75-0x000000001AEC0000-0x000000001AF40000-memory.dmp	family_echelon

Echelon
Echelon is a .NET stealer that targets passwords from browsers, email and cryptocurrency clients.
stealer spyware echelon

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

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

Processes:

5e3b448a401c6b9662d1e3d0d5cb2143.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	5e3b448a401c6b9662d1e3d0d5cb2143.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

Processes:

5e3b448a401c6b9662d1e3d0d5cb2143.exe

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	5e3b448a401c6b9662d1e3d0d5cb2143.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	5e3b448a401c6b9662d1e3d0d5cb2143.exe

Executes dropped EXE 2 IoCs

Processes:

ProtonHack.exeProtonHackers.exe

pid	Process
2148	ProtonHack.exe
2752	ProtonHackers.exe

Loads dropped DLL 2 IoCs

Processes:

5e3b448a401c6b9662d1e3d0d5cb2143.exe

pid	Process
816	5e3b448a401c6b9662d1e3d0d5cb2143.exe
816	5e3b448a401c6b9662d1e3d0d5cb2143.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 2 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
behavioral1/memory/816-0-0x0000000000400000-0x0000000000A84000-memory.dmp	themida
behavioral1/memory/816-16-0x0000000000400000-0x0000000000A84000-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

Processes:

5e3b448a401c6b9662d1e3d0d5cb2143.exe

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	5e3b448a401c6b9662d1e3d0d5cb2143.exe

Looks up external IP address via web service 4 IoCs

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

Processes:

flow	ioc
5	freegeoip.app
6	api.ipify.org
7	api.ipify.org
8	freegeoip.app

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

5e3b448a401c6b9662d1e3d0d5cb2143.exe

pid	Process
816	5e3b448a401c6b9662d1e3d0d5cb2143.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

Processes:

ProtonHack.exe

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

NTFS ADS 2 IoCs

Processes:

5e3b448a401c6b9662d1e3d0d5cb2143.exe

description	ioc	Process
File created	C:\Users\Admin\AppData\Local\Temp\40==K5 >B 0::0.txt	5e3b448a401c6b9662d1e3d0d5cb2143.exe
File opened for modification	C:\Users\Admin\AppData\Local\Temp\40==K5 >B 0::0.txt	5e3b448a401c6b9662d1e3d0d5cb2143.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

ProtonHack.exe

pid	Process
2148	ProtonHack.exe
2148	ProtonHack.exe
2148	ProtonHack.exe
2148	ProtonHack.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

ProtonHack.exeProtonHackers.exe

description	pid	Process
Token: SeDebugPrivilege	2148	ProtonHack.exe
Token: SeDebugPrivilege	2752	ProtonHackers.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

5e3b448a401c6b9662d1e3d0d5cb2143.exeProtonHackers.exe

description	pid	Process	procid_target
PID 816 wrote to memory of 2148	816	5e3b448a401c6b9662d1e3d0d5cb2143.exe	28
PID 816 wrote to memory of 2148	816	5e3b448a401c6b9662d1e3d0d5cb2143.exe	28
PID 816 wrote to memory of 2148	816	5e3b448a401c6b9662d1e3d0d5cb2143.exe	28
PID 816 wrote to memory of 2148	816	5e3b448a401c6b9662d1e3d0d5cb2143.exe	28
PID 816 wrote to memory of 2752	816	5e3b448a401c6b9662d1e3d0d5cb2143.exe	29
PID 816 wrote to memory of 2752	816	5e3b448a401c6b9662d1e3d0d5cb2143.exe	29
PID 816 wrote to memory of 2752	816	5e3b448a401c6b9662d1e3d0d5cb2143.exe	29
PID 816 wrote to memory of 2752	816	5e3b448a401c6b9662d1e3d0d5cb2143.exe	29
PID 2752 wrote to memory of 1612	2752	ProtonHackers.exe	31
PID 2752 wrote to memory of 1612	2752	ProtonHackers.exe	31
PID 2752 wrote to memory of 1612	2752	ProtonHackers.exe	31

C:\Users\Admin\AppData\Local\Temp\5e3b448a401c6b9662d1e3d0d5cb2143.exe
"C:\Users\Admin\AppData\Local\Temp\5e3b448a401c6b9662d1e3d0d5cb2143.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
- NTFS ADS
- Suspicious use of WriteProcessMemory
PID:816
- C:\Users\Admin\AppData\Local\Temp\ProtonHack.exe
  "C:\Users\Admin\AppData\Local\Temp\ProtonHack.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2148
- C:\Users\Admin\AppData\Local\Temp\ProtonHackers.exe
  "C:\Users\Admin\AppData\Local\Temp\ProtonHackers.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2752
- - C:\Windows\system32\WerFault.exe
    C:\Windows\system32\WerFault.exe -u -p 2752 -s 1272
    3⤵
    PID:1612

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\Temp\ProtonHackers.exe

Filesize
253KB

MD5
2addfeda2537d0e29dd11aff81744888

SHA1
973a595b17225f7113d51c37f225146a98b5ca9e

SHA256
f9235a86d849f1b17f65d85eec43dd1aca5f35def08bec4be0feaec317b15808

SHA512
0abb0da37f429b9c60927f3ae39d07897107765e833c53350f28bc521cd11ddd20a8694c15fceda59f6e9f28a883b1e4929168dd05abec4d52d98ab64cdc2074

Download Submit
C:\Users\Admin\AppData\Local\Temp\ProtonHackers.exe

Filesize
418KB

MD5
96c3200d660b501538805a8f72057499

SHA1
6682493d7f7972f41aeb155b6882e125e47b5b80

SHA256
a438524e33c3bd4af0d4ef3bf4a9bba6fd644dde7236384e7e372e081b18753c

SHA512
45ceaa46997494ab9aa778bbd2e3931fefab127a68352939c45fb2ed01dc4e1f85ca96875ef457b03cb4f4bc2af4e1bdcffa655e966c1f6b6ca15ff1cc7274d7

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

Filesize
274KB

MD5
9df1e86f0c44b525df31975949fe225a

SHA1
a1869bd91c12f6e96339d112d2acb0f018c31f6e

SHA256
13685d73ac437d3d5f976b9f600b183a489aa8871596ee9bec5d27ceb53c0b13

SHA512
7dfe7348e4934aa5d5b21af64ed0d90397fb430ea8dd6f5b104b69edc80e51766c6150f8db37749912dc47f604fa18dff4e9cfbf7a850248d16cf8acdd2d5bb6

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

Filesize
363KB

MD5
2fe4f79252cd9cf9cf1a5e8473ea94ef

SHA1
bf77fd826ece97985dc8b6843b1d63a98591646f

SHA256
6c344b38fe2fafe25ae07e760a043e05b8e991329350306dff21c62dca5a2373

SHA512
1ccd6644b9fad5b7ee5e0e79348339c70360d46e2164afc9ba7d49e4984ece43e9c4b666a6236abba090f6d14353f3e04d371be11edb38043eddafa0dfc52a36

Download Submit
memory/816-0-0x0000000000400000-0x0000000000A84000-memory.dmp

Filesize
6.5MB

Download
memory/816-1-0x00000000773F0000-0x00000000773F2000-memory.dmp

Filesize
8KB

Download
memory/816-16-0x0000000000400000-0x0000000000A84000-memory.dmp

Filesize
6.5MB

Download
memory/2148-17-0x00000000008F0000-0x000000000093A000-memory.dmp

Filesize
296KB

Download
memory/2148-19-0x000007FEF5900000-0x000007FEF62EC000-memory.dmp

Filesize
9.9MB

Download
memory/2148-21-0x000000001B4E0000-0x000000001B560000-memory.dmp

Filesize
512KB

Download
memory/2148-73-0x000007FEF5900000-0x000007FEF62EC000-memory.dmp

Filesize
9.9MB

Download
memory/2752-18-0x0000000000050000-0x00000000000E8000-memory.dmp

Filesize
608KB

Download
memory/2752-20-0x000007FEF5900000-0x000007FEF62EC000-memory.dmp

Filesize
9.9MB

Download
memory/2752-40-0x000000001AEC0000-0x000000001AF40000-memory.dmp

Filesize
512KB

Download
memory/2752-74-0x000007FEF5900000-0x000007FEF62EC000-memory.dmp

Filesize
9.9MB

Download
memory/2752-75-0x000000001AEC0000-0x000000001AF40000-memory.dmp

Filesize
512KB

Download