44caliber | f1a5c8f4f3ab1e52cb2b85da2c0a0a1196600d77864b2a08f10994df7ca19e47

Analysis

max time kernel
93s
max time network
122s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
03/02/2024, 22:37

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General

Target
8d88b6afcfdf51afa91d7fbdbda3123f.exe
Size 3.7MB
Sample240203-2kascabfa7
SHA256 f1a5c8f4f3ab1e52cb2b85da2c0a0a1196600d77864b2a08f10994df7ca19e47
MD5 8d88b6afcfdf51afa91d7fbdbda3123f
SHA1 8992be4a6ad43f41f4098f5f6e16c52ce1a15128
SHA512 1df17fbc715acee1c6a8067372c08e6566b50a92840af6d3369d00cf6f0cad9256f5d16f22f57055db89a9fb10520506f51f97eabf5177201f31fe9119df1527
SSDEEP 98304:ebvEDT/eSXK4YubNjNS/AAjz0h+9I/E9rep:eE/LYuFNp4++hSp
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

44caliber spyware stealer

Malware Config

Extracted

Family

44caliber

https://discord.com/api/webhooks/867414880008142858/TD_59PPDbRxUvtxfYmpmvXB-AISV68npXT3nWVWmC5qoDjluGk0XKjmzmpP1jyAwpfZk

Signatures

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

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-768304381-2824894965-3840216961-1000\Control Panel\International\Geo\Nation	8d88b6afcfdf51afa91d7fbdbda3123f.exe
Key value queried	\REGISTRY\USER\S-1-5-21-768304381-2824894965-3840216961-1000\Control Panel\International\Geo\Nation	cryptTROJAN.sfx.exe

Executes dropped EXE 2 IoCs

pid	Process
3580	cryptTROJAN.sfx.exe
3484	cryptTROJAN.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
6	freegeoip.app
7	freegeoip.app

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3484	cryptTROJAN.exe
3484	cryptTROJAN.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

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

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3484	cryptTROJAN.exe
3484	cryptTROJAN.exe
3484	cryptTROJAN.exe
3484	cryptTROJAN.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3484	cryptTROJAN.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3484	cryptTROJAN.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 6068 wrote to memory of 3580	6068	8d88b6afcfdf51afa91d7fbdbda3123f.exe	85
PID 6068 wrote to memory of 3580	6068	8d88b6afcfdf51afa91d7fbdbda3123f.exe	85
PID 6068 wrote to memory of 3580	6068	8d88b6afcfdf51afa91d7fbdbda3123f.exe	85
PID 3580 wrote to memory of 3484	3580	cryptTROJAN.sfx.exe	87
PID 3580 wrote to memory of 3484	3580	cryptTROJAN.sfx.exe	87
PID 3580 wrote to memory of 3484	3580	cryptTROJAN.sfx.exe	87

C:\Users\Admin\AppData\Local\Temp\8d88b6afcfdf51afa91d7fbdbda3123f.exe
"C:\Users\Admin\AppData\Local\Temp\8d88b6afcfdf51afa91d7fbdbda3123f.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:6068
- C:\Users\Admin\AppData\Local\Temp\cryptTROJAN.sfx.exe
  "C:\Users\Admin\AppData\Local\Temp\cryptTROJAN.sfx.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:3580
- - C:\Users\Admin\AppData\Local\Temp\cryptTROJAN.exe
    "C:\Users\Admin\AppData\Local\Temp\cryptTROJAN.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - Checks processor information in registry
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:3484

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

Bookmarks.txt

Path C:\Users\Admin\AppData\Local\44\Browsers\Firefox\Bookmarks.txt
Size 105B
SHA256 c84c98bbf5e0ef9c8d0708b5d60c5bb656b7d6be5135d7f7a8d25557e08cf142
MD5 2e9d094dda5cdc3ce6519f75943a4ff4
SHA1 5d989b4ac8b699781681fe75ed9ef98191a5096c
SHA512 d1f7eed00959e902bdb2125b91721460d3ff99f3bdfc1f2a343d4f58e8d4e5e5a06c0c6cdc0379211c94510f7c00d7a8b34fa7d0ca0c3d54cbbe878f1e9812b7
MD5 SHA1 SHA512

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Process.txt

Path C:\Users\Admin\AppData\Local\44\Process.txt
Size 1KB
SHA256 aa94021f388a3344468d22e4f61bc6fe65a9298293132629a92682e55aaa6888
MD5 801e378f85c5b3318afde5d5fbce65c6
SHA1 2210eaf6d140f7803b568a74f00f2e538cd56eb1
SHA512 594b95c4a7f296130354dd1ddd234860540c28f411c6a48db7d6bf5aad5f7643e8cd152c368b53892de277e285f65e24924093f477017dba1fa96df90e415cd8
MD5 SHA1 SHA512

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Process.txt

Path C:\Users\Admin\AppData\Local\44\Process.txt
Size 404B
SHA256 38ae6dc1e3c84a1c1eadc589440dc3ef4bb3c33e2914eed6fe59b1dfc78d4241
MD5 40bf9f1012e282053a956614b3467911
SHA1 6f52067d12224e8b97f475ad524b5f6c8292072d
SHA512 c7a9ed612c4e1ac547bc1f4282d8cea30010b1bb7e0778562105310803e6eeaec74aed814fc425296787f13bda0d0bd8445a92819e61c080428ec625f52b3fbb
MD5 SHA1 SHA512

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Process.txt

Path C:\Users\Admin\AppData\Local\44\Process.txt
Size 740B
SHA256 7f8c7bf38cca5645d520ba67a9f341247aac66adb562cf95f158c068711e930e
MD5 c586eb6cd6194f7075b3973dc61ac049
SHA1 409471e2df597717c99259b5f7278e5fab391d8b
SHA512 afc5fda8f27f7fd43d7ec0fc1d7518ff725ec457dac8d14ea9b055d8a63fbc7a12c39f264f9dfa705eda1b33de3e1b44f4e9015eb65cdeb5107c6be01da2bb8c
MD5 SHA1 SHA512

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cryptTROJAN.exe

Path C:\Users\Admin\AppData\Local\Temp\cryptTROJAN.exe
Size 780KB
SHA256 dc404ff3bcf1671f826c05eb6c13c14825021c0ca3c4b6f1b4684bdd27af768d
MD5 451055c310b0bdeed20908240ce6d63e
SHA1 c26024481d73c2ada258298c53545614c6c4327d
SHA512 a3c903d6e6004d12808fbcab6476176060426045bab35ec3bec9c074fab291e38d3c347a492ed618d4b6b00715ad36592dfdb9ea633b9eee3bd928f808bc7f82
SSDEEP 24576:5VOK1l97GzRtVgSHMGLS7uJ36IGW3Q8nbV0LH:Thv7yUcH7ZG7
MD5 SHA1 SHA512 SSDEEP

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cryptTROJAN.exe

Path C:\Users\Admin\AppData\Local\Temp\cryptTROJAN.exe
Size 1.2MB
SHA256 68f3e5266ef869124be9372c77b53a116d6ddc5e11f74fb920bd1d58bcfd4968
MD5 6bc1ac14fb765bc7aa33a62e6e7701d7
SHA1 4455de5129e69a432de89611ee791b1e2f40111f
SHA512 6dffbecadc1e7784687960b807354abd85e7872435f033480c49ceedd08a3e40446343ffbf1f435be1779545d7b834eac5e346353c5b43e1cf0ab1df8e7e5fcc
SSDEEP 24576:5VOK1l97GzRtVgSHMGLS7uJ36IGW3Q8nbV0Lvhc1XvK/RsTTXLyFNqgH:Thv7yUcH7ZGVWXqRWOFNqgH
MD5 SHA1 SHA512 SSDEEP

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cryptTROJAN.exe

Path C:\Users\Admin\AppData\Local\Temp\cryptTROJAN.exe
Size 1.1MB
SHA256 dfdb0bc24921512b3b4f6eb921b222fb2574dd8cd3e5214edea7c5b09e04d61d
MD5 12ad539be2bc54a7cfdc973ee4cf1ee2
SHA1 f83c08a7bd5ade366376dc0ffe3b0afea00d78ea
SHA512 4e2185ef5f9a2f91427be1b5f01954d744fe7d3766a279cf93c1b9186a6fe9ec2ee61e45e9b900121ca68d0ca3ba0cc16269d26a3c964c4812ae23dd06f78255
SSDEEP 24576:5VOK1l97GzRtVgSHMGLS7uJ36IGW3Q8nbV0Lvhc1XvK/RsTTXLyFNqJ:Thv7yUcH7ZGVWXqRWOFNqJ
MD5 SHA1 SHA512 SSDEEP

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cryptTROJAN.sfx.exe

Path C:\Users\Admin\AppData\Local\Temp\cryptTROJAN.sfx.exe
Size 1.5MB
SHA256 c2667527dd33a4d633aafc8a8fe44a50b0745693c427363251ac1d28ed1a330c
MD5 3f5d5939fc0c515ddbc9e9894e34ae04
SHA1 8e77baff4342245a4fe90ddfc42297c778580c07
SHA512 6606009775077c7756d00cf3dcb9840f33de5c823ac36e11a1de226c1ca468d026bb709e2bbcfb5b416bdf804e064067bbb455d609d418dc6ff5bd2197eeec75
SSDEEP 24576:82G/nvxW3WdmMNxcL04BTRv99SogweGGSq7qVh3w6w86LsAjLXSFQC7cCb7+uSeZ:8bA3lMPSn79Hpemf/6sA3dC7cCbfRT9
MD5 SHA1 SHA512 SSDEEP

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memory/3484-27-0x00000000062E0000-0x00000000062F0000-memory.dmp

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memory/3484-24-0x0000000000FB0000-0x000000000135C000-memory.dmp

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memory/3484-33-0x0000000006C70000-0x0000000006D02000-memory.dmp

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memory/3484-63-0x0000000007800000-0x0000000007DA4000-memory.dmp

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memory/3484-150-0x00000000076E0000-0x0000000007746000-memory.dmp

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memory/3484-26-0x0000000000FB0000-0x000000000135C000-memory.dmp

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memory/3484-25-0x0000000074580000-0x0000000074D30000-memory.dmp

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memory/3484-23-0x0000000000FB0000-0x000000000135C000-memory.dmp

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memory/3484-154-0x0000000000FB0000-0x000000000135C000-memory.dmp

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memory/3484-155-0x0000000074580000-0x0000000074D30000-memory.dmp

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