44caliber | f920013efc8d6839e9ff3a2ce43010e1fb46a941a95f99b8c39335d1fbb1bc29

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

C2

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

Processes:

MLz8MwLY1o.exe

pid process

3044 MLz8MwLY1o.exe
Loads dropped DLL 1 IoCs

Processes:

4e66b442315b528793daf29f272beb6e.exe

pid process

1272 4e66b442315b528793daf29f272beb6e.exe

pid	process
3044	MLz8MwLY1o.exe

pid	process
1272	4e66b442315b528793daf29f272beb6e.exe

Themida packer 5 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

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

Processes:

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.

Processes:

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

flow	ioc
2	freegeoip.app
3	freegeoip.app

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

4e66b442315b528793daf29f272beb6e.exe

description	pid	process	target process
PID 1272 wrote to memory of 3044	1272	4e66b442315b528793daf29f272beb6e.exe	MLz8MwLY1o.exe
PID 1272 wrote to memory of 3044	1272	4e66b442315b528793daf29f272beb6e.exe	MLz8MwLY1o.exe
PID 1272 wrote to memory of 3044	1272	4e66b442315b528793daf29f272beb6e.exe	MLz8MwLY1o.exe
PID 1272 wrote to memory of 3044	1272	4e66b442315b528793daf29f272beb6e.exe	MLz8MwLY1o.exe

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

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\MLz8MwLY1o.exe

MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

Download Submit
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

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads