44caliber | 927bd6cdc3db441da001022f2e9a4091027f857ca6b7787a2acf87766cc8d9a3

General

Target

548a6a63ed47c3ffec35a49139a71537.exe
Size

13.1MB
MD5

548a6a63ed47c3ffec35a49139a71537
SHA1

efd633af58692e7189a6c3c63317c310884841c9
SHA256

927bd6cdc3db441da001022f2e9a4091027f857ca6b7787a2acf87766cc8d9a3
SHA512

a6097350d0f3df88c553e0a8b498162515754ab29e92cb3ca2b2299f62b2c5dde6c5310d7d3aef1225376fc08db8bfb6fc24600bffb39859fc872d8df25c8965
SSDEEP

393216:pcChW/Sh1Y8pgQBL1jpQIcaMzWz8yNb3:aV/Sh18adMzWIyh3

Score

10^/10

44caliber spyware stealer

Malware Config

Extracted

Family

44caliber

C2

https://discordapp.com/api/webhooks/873463242905755648/toN0X9zZYgcbFlkZ7jCqLk4I_sGhgsbHl5HJ9jgcfMn_Sw0HRHJneP9bBZz01msNSKLJ

Signatures

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

Executes dropped EXE 3 IoCs

pid	Process
2720	autoit.exe
2696	MultiHack.exe
2708	MultiHack v2.exe

Loads dropped DLL 8 IoCs

pid	Process
2696	MultiHack.exe
2696	MultiHack.exe
2696	MultiHack.exe
2696	MultiHack.exe
2720	autoit.exe
2720	autoit.exe
2720	autoit.exe
2720	autoit.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
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials In Files
T1552.001

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 2 IoCs

pid	Process
2708	MultiHack v2.exe
2708	MultiHack v2.exe

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

System Information Discovery
T1082

NSIS installer 4 IoCs

installer

resource	yara_rule
behavioral1/files/0x00090000000122c4-8.dat	nsis_installer_1
behavioral1/files/0x00090000000122c4-8.dat	nsis_installer_2
behavioral1/files/0x00090000000122c4-11.dat	nsis_installer_1
behavioral1/files/0x00090000000122c4-11.dat	nsis_installer_2

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	MultiHack v2.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	MultiHack v2.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
1676	548a6a63ed47c3ffec35a49139a71537.exe
1676	548a6a63ed47c3ffec35a49139a71537.exe
1676	548a6a63ed47c3ffec35a49139a71537.exe
2708	MultiHack v2.exe
2708	MultiHack v2.exe
2708	MultiHack v2.exe
2708	MultiHack v2.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2720	autoit.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1676	548a6a63ed47c3ffec35a49139a71537.exe
Token: SeDebugPrivilege	2708	MultiHack v2.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2708	MultiHack v2.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1676 wrote to memory of 2720	1676	548a6a63ed47c3ffec35a49139a71537.exe	28
PID 1676 wrote to memory of 2720	1676	548a6a63ed47c3ffec35a49139a71537.exe	28
PID 1676 wrote to memory of 2720	1676	548a6a63ed47c3ffec35a49139a71537.exe	28
PID 1676 wrote to memory of 2720	1676	548a6a63ed47c3ffec35a49139a71537.exe	28
PID 1676 wrote to memory of 2720	1676	548a6a63ed47c3ffec35a49139a71537.exe	28
PID 1676 wrote to memory of 2720	1676	548a6a63ed47c3ffec35a49139a71537.exe	28
PID 1676 wrote to memory of 2720	1676	548a6a63ed47c3ffec35a49139a71537.exe	28
PID 1676 wrote to memory of 2696	1676	548a6a63ed47c3ffec35a49139a71537.exe	30
PID 1676 wrote to memory of 2696	1676	548a6a63ed47c3ffec35a49139a71537.exe	30
PID 1676 wrote to memory of 2696	1676	548a6a63ed47c3ffec35a49139a71537.exe	30
PID 1676 wrote to memory of 2696	1676	548a6a63ed47c3ffec35a49139a71537.exe	30
PID 2696 wrote to memory of 2708	2696	MultiHack.exe	29
PID 2696 wrote to memory of 2708	2696	MultiHack.exe	29
PID 2696 wrote to memory of 2708	2696	MultiHack.exe	29
PID 2696 wrote to memory of 2708	2696	MultiHack.exe	29

C:\Users\Admin\AppData\Local\Temp\548a6a63ed47c3ffec35a49139a71537.exe
"C:\Users\Admin\AppData\Local\Temp\548a6a63ed47c3ffec35a49139a71537.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1676
- C:\Users\Admin\AppData\Local\Temp\autoit.exe
  "C:\Users\Admin\AppData\Local\Temp\autoit.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious behavior: GetForegroundWindowSpam
  PID:2720
- C:\Users\Admin\AppData\Local\Temp\MultiHack.exe
  "C:\Users\Admin\AppData\Local\Temp\MultiHack.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:2696

C:\Users\Admin\AppData\Local\Temp\MultiHack v2.exe
"C:\Users\Admin\AppData\Local\Temp\MultiHack v2.exe"
1⤵
- Executes dropped EXE
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:2708

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

2

T1552

Credentials In Files

2

T1552.001

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\MultiHack.exe

Filesize
1.1MB

MD5
94127a32efd1e0c567d78d31cf6da3eb

SHA1
72544197e8f1bb4aa5468c6150eb17165f2d1669

SHA256
cb35cad6ee87fc00930928ced71b7a55797fad3e9b7585e5daf49b4ef534db23

SHA512
4dfd946e4384834e3d5d6596e11ba408e2f9c1bf5cf77e6ca059de49997fa36242ec57f3fee10dd1402309b67b1a3c2ca15d5932580d9cd7f66f36e97561a5f0

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

Filesize
1.4MB

MD5
254fc0f59df2a85df3306e7f6f7ebfd2

SHA1
874b53dc36ca17a3a8e2069ccab66bc7c31740f6

SHA256
63069aa52c995abb6c5256fad5d9889543738bee81fb51ef3b5cf1471af37574

SHA512
83b50b65c83aa8978bab0431da9e00d89dcd2bed3c862bddfd318f5d5cdc3223aa4d6c7b56a8931863cc73df6a79eabc7211fd00a65705483fdd7a9eeece8105

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

Filesize
92KB

MD5
519a8005ea3e00ca41163e35f77bc0bd

SHA1
4dd20264d201b0269ac2d540945843f5ee4e9726

SHA256
de27413bc5befc482d384b2542a409cc7b1b860ab6559125afc9c3e1d60a68a3

SHA512
06492a6e11bece1983e2431cf1f76266b6fd624cf7db5003f6187cc0b44ea5dcd975353f833d7efc36b296a1b70a6d4287c0f4522ebcbe80c54858e9419cd580

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

Filesize
386KB

MD5
f98595c89b92ce1e46c0e1ef431afd33

SHA1
42f8e837d266c2482ae919b284a3328ed7aedbc6

SHA256
87d8fc536708bc40d118af63d51353b66543a377ce157a91abbb71c34630ed36

SHA512
49f8e86ce5159c40bb24cd3011590454c9b0e6871a91a5cfcd3b3669ae43a275e398b412c44b3d7cfc5ea7bd0a6c4438645982be282f50e02f9eaeda107238a6

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

Filesize
1024KB

MD5
521a5b5b9ce193e9992051b0988120bc

SHA1
edcf031b14d6205d427f9e392c039c11766ad2c1

SHA256
ecf5ab67d4755eddb3ab4cff91417ae1eddbc5cab0ebc51ac6160939a11d8a41

SHA512
dbbc089b8d18b3cdf027964a80945758ca5d393c99dc3e9a3b161ebf550740db984d8f8d60752517a7bcf87863be4ac1574faffe3dbf9f24ea765dede7dfd8e4

Download Submit
memory/1676-0-0x0000000000990000-0x00000000016AC000-memory.dmp

Filesize
13.1MB

Download
memory/1676-22-0x000007FEF6440000-0x000007FEF6E2C000-memory.dmp

Filesize
9.9MB

Download
memory/1676-1-0x000007FEF6440000-0x000007FEF6E2C000-memory.dmp

Filesize
9.9MB

Download
memory/1676-2-0x000000001BD30000-0x000000001BDB0000-memory.dmp

Filesize
512KB

Download
memory/2696-38-0x0000000003D70000-0x000000000411C000-memory.dmp

Filesize
3.7MB

Download
memory/2696-39-0x0000000003D70000-0x000000000411C000-memory.dmp

Filesize
3.7MB

Download
memory/2696-40-0x0000000003D70000-0x000000000411C000-memory.dmp

Filesize
3.7MB

Download
memory/2696-193-0x0000000003D70000-0x000000000411C000-memory.dmp

Filesize
3.7MB

Download
memory/2708-44-0x0000000001340000-0x00000000016EC000-memory.dmp

Filesize
3.7MB

Download
memory/2708-45-0x00000000749C0000-0x00000000750AE000-memory.dmp

Filesize
6.9MB

Download
memory/2708-46-0x0000000005310000-0x0000000005350000-memory.dmp

Filesize
256KB

Download
memory/2708-42-0x0000000001340000-0x00000000016EC000-memory.dmp

Filesize
3.7MB

Download
memory/2708-192-0x00000000749C0000-0x00000000750AE000-memory.dmp

Filesize
6.9MB

Download
memory/2708-191-0x0000000001340000-0x00000000016EC000-memory.dmp

Filesize
3.7MB

Download

Analysis

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