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

Themida packer 19 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\FuY68BcMJE.exe	themida
C:\Users\Admin\AppData\Local\Temp\FuY68BcMJE.exe	themida
behavioral2/memory/1616-55-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp	themida
behavioral2/memory/1616-56-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp	themida
behavioral2/memory/1616-57-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp	themida
behavioral2/memory/1616-58-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp	themida
behavioral2/memory/1616-157-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp	themida
behavioral2/memory/1616-159-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp	themida
behavioral2/memory/1616-161-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp	themida
behavioral2/memory/1616-165-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp	themida
behavioral2/memory/1616-167-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp	themida
behavioral2/memory/1616-169-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp	themida
behavioral2/memory/1616-171-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp	themida
behavioral2/memory/1616-173-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp	themida
behavioral2/memory/1616-175-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp	themida
behavioral2/memory/1616-177-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp	themida
behavioral2/memory/1616-179-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp	themida
behavioral2/memory/1616-181-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp	themida
behavioral2/memory/1616-183-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp	themida

UPX packed file 2 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2540-0-0x0000000000400000-0x000000000142A000-memory.dmp	upx
behavioral2/memory/2540-156-0x0000000000400000-0x000000000142A000-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

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

System Information Discovery
T1082

flow	ioc
15	freegeoip.app
16	freegeoip.app

C:\Users\Admin\AppData\Local\Temp\4e66b442315b528793daf29f272beb6e.exe
"C:\Users\Admin\AppData\Local\Temp\4e66b442315b528793daf29f272beb6e.exe"
1⤵
PID:2540

C:\Users\Admin\AppData\Local\Temp\g2yBBdoqs4.exe
"C:\Users\Admin\AppData\Local\Temp\g2yBBdoqs4.exe"
2⤵
PID:1292

C:\Users\Admin\AppData\Local\Temp\FuY68BcMJE.exe
"C:\Users\Admin\AppData\Local\Temp\FuY68BcMJE.exe"
2⤵
PID:1616

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c pause > nul
3⤵
PID:1844

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\FuY68BcMJE.exe
Filesize
124KB

MD5
1db34d5a86f7f1bb1e89a4203b5d7e1e

SHA1
11048f8c828d5061e1ee15b28f1735817155e711

SHA256
29039a0db893eaeaf74fd10b12dc0091456b4205f8b874fbc47806be61d52d0c

SHA512
ece1fcad4a1c190f2bc5a78154cfe72e7b8806e1bf98c907a89e3ce8323180944bcb363d0b8c2b6f071bcde940da10f35b181c79533bc8353a0548e98b46e15d

Download Submit
C:\Users\Admin\AppData\Local\Temp\FuY68BcMJE.exe
MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

Download Submit
C:\Users\Admin\AppData\Local\Temp\g2yBBdoqs4.exe
Filesize
274KB

MD5
78fe81b560fe19e1a42a017a667f3f06

SHA1
4a75705ce154ef06374f1c48e7dcc321b8342d5a

SHA256
122b27bae3026a926b31aee5722909c010291a4635a3bb725caa1c71006ea327

SHA512
f19b09c6883a6df1f15dddaf8ac06d9709fc038ae1c8ca9f69d994c3370c35069e304690275ee1f3aebb44e8e682071ee56c06c01597c9afd925ada66499d050

Download Submit
memory/1292-155-0x00007FFFA4780000-0x00007FFFA5241000-memory.dmp

Filesize
10.8MB

Download
memory/1292-12-0x0000000000180000-0x00000000001CA000-memory.dmp

Filesize
296KB

Download
memory/1292-47-0x00007FFFA4780000-0x00007FFFA5241000-memory.dmp

Filesize
10.8MB

Download
memory/1292-48-0x000000001AED0000-0x000000001AEE0000-memory.dmp

Filesize
64KB

Download
memory/1616-157-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp

Filesize
20.6MB

Download
memory/1616-163-0x00007FFFC3200000-0x00007FFFC32BE000-memory.dmp

Filesize
760KB

Download
memory/1616-56-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp

Filesize
20.6MB

Download
memory/1616-57-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp

Filesize
20.6MB

Download
memory/1616-151-0x00007FFF83210000-0x00007FFF83220000-memory.dmp

Filesize
64KB

Download
memory/1616-152-0x00007FFFC3200000-0x00007FFFC32BE000-memory.dmp

Filesize
760KB

Download
memory/1616-58-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp

Filesize
20.6MB

Download
memory/1616-54-0x00007FFFC33B0000-0x00007FFFC35A5000-memory.dmp

Filesize
2.0MB

Download
memory/1616-185-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp

Filesize
20.6MB

Download
memory/1616-183-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp

Filesize
20.6MB

Download
memory/1616-159-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp

Filesize
20.6MB

Download
memory/1616-161-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp

Filesize
20.6MB

Download
memory/1616-162-0x00007FFFC33B0000-0x00007FFFC35A5000-memory.dmp

Filesize
2.0MB

Download
memory/1616-55-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp

Filesize
20.6MB

Download
memory/1616-165-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp

Filesize
20.6MB

Download
memory/1616-167-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp

Filesize
20.6MB

Download
memory/1616-169-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp

Filesize
20.6MB

Download
memory/1616-171-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp

Filesize
20.6MB

Download
memory/1616-173-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp

Filesize
20.6MB

Download
memory/1616-175-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp

Filesize
20.6MB

Download
memory/1616-177-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp

Filesize
20.6MB

Download
memory/1616-179-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp

Filesize
20.6MB

Download
memory/1616-181-0x00007FF6291E0000-0x00007FF62A685000-memory.dmp

Filesize
20.6MB

Download
memory/2540-0-0x0000000000400000-0x000000000142A000-memory.dmp

Filesize
16.2MB

Download
memory/2540-156-0x0000000000400000-0x000000000142A000-memory.dmp

Filesize
16.2MB

Download

Analysis

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