44caliber | f920013efc8d6839e9ff3a2ce43010e1fb46a941a95f99b8c39335d1fbb1bc29

Analysis

max time kernel
0s
max time network
118s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
09/01/2024, 18:42

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General

Target

4e66b442315b528793daf29f272beb6e.exe
Size

13.2MB
MD5

4e66b442315b528793daf29f272beb6e
SHA1

5085c7f9d376063e9544fc9fe6c94a3567fae67d
SHA256

f920013efc8d6839e9ff3a2ce43010e1fb46a941a95f99b8c39335d1fbb1bc29
SHA512

5165565ebc68a408842cf6ea6bf14d60172d2f4fc2c684d16235db2368ae12f53277580fc2103eda1fc102bc68e8742882ab78e74b31ee686bd3c3c5941d89e1
SSDEEP

393216:CWeWk6XZcIgBBQFOnQ+NZrqCkbEp+DNjyymL8AV:Cz6J7gP8OnQctRQg+hyyW

Score

10^/10

44caliber stealer themida upx

Malware Config

Extracted

Family

44caliber

https://discord.com/api/webhooks/864993390039138344/KcIraJ14D-c_gxt8b62QhfVu_PGaoIgxX5A9WLR2Iw9WLUoF8VGIsnRR969mXFvP0Unf

Signatures

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

Executes dropped EXE 1 IoCs

pid	Process
3044	MLz8MwLY1o.exe

Loads dropped DLL 1 IoCs

pid	Process
1272	4e66b442315b528793daf29f272beb6e.exe

Themida packer 5 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral1/memory/2168-39-0x000000013F3E0000-0x0000000140885000-memory.dmp	themida
behavioral1/memory/2168-40-0x000000013F3E0000-0x0000000140885000-memory.dmp	themida
behavioral1/memory/2168-41-0x000000013F3E0000-0x0000000140885000-memory.dmp	themida
behavioral1/memory/2168-47-0x000000013F3E0000-0x0000000140885000-memory.dmp	themida
behavioral1/memory/2168-42-0x000000013F3E0000-0x0000000140885000-memory.dmp	themida

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/1272-1-0x0000000000400000-0x000000000142A000-memory.dmp	upx
behavioral1/memory/1272-81-0x0000000000400000-0x000000000142A000-memory.dmp	upx

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

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1272 wrote to memory of 3044	1272	4e66b442315b528793daf29f272beb6e.exe	21
PID 1272 wrote to memory of 3044	1272	4e66b442315b528793daf29f272beb6e.exe	21
PID 1272 wrote to memory of 3044	1272	4e66b442315b528793daf29f272beb6e.exe	21
PID 1272 wrote to memory of 3044	1272	4e66b442315b528793daf29f272beb6e.exe	21

C:\Users\Admin\AppData\Local\Temp\4e66b442315b528793daf29f272beb6e.exe
"C:\Users\Admin\AppData\Local\Temp\4e66b442315b528793daf29f272beb6e.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1272
- C:\Users\Admin\AppData\Local\Temp\0dEcW4jiFC.exe
  "C:\Users\Admin\AppData\Local\Temp\0dEcW4jiFC.exe"
  2⤵
  PID:2168
- C:\Users\Admin\AppData\Local\Temp\MLz8MwLY1o.exe
  "C:\Users\Admin\AppData\Local\Temp\MLz8MwLY1o.exe"
  2⤵
  - Executes dropped EXE
  PID:3044

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1272-7-0x0000000003940000-0x0000000003950000-memory.dmp

Filesize
64KB

Download
memory/1272-82-0x0000000003940000-0x0000000003950000-memory.dmp

Filesize
64KB

Download
memory/1272-81-0x0000000000400000-0x000000000142A000-memory.dmp

Filesize
16.2MB

Download
memory/1272-1-0x0000000000400000-0x000000000142A000-memory.dmp

Filesize
16.2MB

Download
memory/2168-44-0x0000000036DC0000-0x0000000036DD0000-memory.dmp

Filesize
64KB

Download
memory/2168-48-0x0000000076EE0000-0x0000000077089000-memory.dmp

Filesize
1.7MB

Download
memory/2168-39-0x000000013F3E0000-0x0000000140885000-memory.dmp

Filesize
20.6MB

Download
memory/2168-40-0x000000013F3E0000-0x0000000140885000-memory.dmp

Filesize
20.6MB

Download
memory/2168-41-0x000000013F3E0000-0x0000000140885000-memory.dmp

Filesize
20.6MB

Download
memory/2168-45-0x0000000076DC0000-0x0000000076EDF000-memory.dmp

Filesize
1.1MB

Download
memory/2168-49-0x0000000076DC0000-0x0000000076EDF000-memory.dmp

Filesize
1.1MB

Download
memory/2168-42-0x000000013F3E0000-0x0000000140885000-memory.dmp

Filesize
20.6MB

Download
memory/2168-47-0x000000013F3E0000-0x0000000140885000-memory.dmp

Filesize
20.6MB

Download
memory/2168-46-0x0000000076EE0000-0x0000000077089000-memory.dmp

Filesize
1.7MB

Download
memory/2168-20-0x0000000076EE0000-0x0000000077089000-memory.dmp

Filesize
1.7MB

Download
memory/2168-43-0x000007FEBCE90000-0x000007FEBCEA0000-memory.dmp

Filesize
64KB

Download
memory/3044-10-0x0000000000CF0000-0x0000000000D3A000-memory.dmp

Filesize
296KB

Download
memory/3044-80-0x000007FEF52F0000-0x000007FEF5CDC000-memory.dmp

Filesize
9.9MB

Download
memory/3044-18-0x000000001B490000-0x000000001B510000-memory.dmp

Filesize
512KB

Download
memory/3044-17-0x000007FEF52F0000-0x000007FEF5CDC000-memory.dmp

Filesize
9.9MB

Download