44caliber | 8b919845a9b13861d7095a64e5e2db3298021bccc7962fd7995b9de9e76b268f

Analysis

max time kernel
143s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20230831-en
resource tags

arch:x64arch:x86image:win10v2004-20230831-enlocale:en-usos:windows10-2004-x64system
submitted
10/09/2023, 18:36

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General

Target
8b919845a9b13861d7095a64e5e2db3298021bccc7962fd7995b9de9e76b268f.exe
Size 3.2MB
Sample230910-w86a9sba7w
SHA256 8b919845a9b13861d7095a64e5e2db3298021bccc7962fd7995b9de9e76b268f
MD5 e96c81e32069fcfb94da98c9be02a855
SHA1 bd4146f93ce56aeac1ec5b5ac9fe5af1dab81701
SHA512 8df7a9b026dc1a4a7aa7567cc5db31fded149126cb5782ee76e9a433ea37194bdcd2b69070daf7a3ee8a866d939d40ec9204f79453bef85b397bc70840e273b3
SSDEEP 49152:YIun087q30q/a6rrfvitpxOUMlHUK5XejfEOVpZ6MZj9X5myer3lPO8H5u:YL0OzqS6rr2YxlHejsO3Z9Z/m9re
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

44caliber spyware stealer

Malware Config

Extracted

Family

44caliber

https://discord.com/api/webhooks/1150051435472498830/YhoiwXwAAKsBrBSJ0St12JGqZ_ebCKHh9rfhnswtrjkVxmov8EdH-iOO0gTBXrngx-L8

Signatures

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

Checks computer location settings 2 TTPs 1 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-1-5-21-528036852-1341495193-1175965888-1000\Control Panel\International\Geo\Nation	8b919845a9b13861d7095a64e5e2db3298021bccc7962fd7995b9de9e76b268f.exe

Executes dropped EXE 1 IoCs

pid	Process
872	F2.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
30	freegeoip.app
31	freegeoip.app

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	F2.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	F2.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
872	F2.exe
872	F2.exe
872	F2.exe
872	F2.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	872	F2.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3344 wrote to memory of 872	3344	8b919845a9b13861d7095a64e5e2db3298021bccc7962fd7995b9de9e76b268f.exe	86
PID 3344 wrote to memory of 872	3344	8b919845a9b13861d7095a64e5e2db3298021bccc7962fd7995b9de9e76b268f.exe	86

C:\Users\Admin\AppData\Local\Temp\8b919845a9b13861d7095a64e5e2db3298021bccc7962fd7995b9de9e76b268f.exe
"C:\Users\Admin\AppData\Local\Temp\8b919845a9b13861d7095a64e5e2db3298021bccc7962fd7995b9de9e76b268f.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3344
- C:\Users\Admin\AppData\Local\Temp\F2.exe
  "C:\Users\Admin\AppData\Local\Temp\F2.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:872

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

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Downloads

F2.exe

Path C:\Users\Admin\AppData\Local\Temp\F2.exe
Size 274KB
SHA256 d3654319e1b0e888468008ef9190923bd9e5098e7aca7e1e661ea896d9ed1d9e
MD5 39ff6663f1a341e3ee70073244014988
SHA1 8ccfae8001536cc2386cda09cd257a29d5e61f81
SHA512 2f3da46a50003e13bb0b4d88a0eb7878fc1c1b98e091cc2a3352922c93b98a7f46f8ad07a77c7be8faec0ebb421e03a06321a949c9ce1d481f64a5366658d1ca
SSDEEP 6144:Qf+BLtABPDslRpZrQWT0IQZQZ9afTy8lI1D0yMj:rlmK0IQZQdx1Duj
MD5 SHA1 SHA512 SSDEEP

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F2.exe

Path C:\Users\Admin\AppData\Local\Temp\F2.exe
Size 274KB
SHA256 d3654319e1b0e888468008ef9190923bd9e5098e7aca7e1e661ea896d9ed1d9e
MD5 39ff6663f1a341e3ee70073244014988
SHA1 8ccfae8001536cc2386cda09cd257a29d5e61f81
SHA512 2f3da46a50003e13bb0b4d88a0eb7878fc1c1b98e091cc2a3352922c93b98a7f46f8ad07a77c7be8faec0ebb421e03a06321a949c9ce1d481f64a5366658d1ca
SSDEEP 6144:Qf+BLtABPDslRpZrQWT0IQZQZ9afTy8lI1D0yMj:rlmK0IQZQdx1Duj
MD5 SHA1 SHA512 SSDEEP

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F2.exe

Path C:\Users\Admin\AppData\Local\Temp\F2.exe
Size 274KB
SHA256 d3654319e1b0e888468008ef9190923bd9e5098e7aca7e1e661ea896d9ed1d9e
MD5 39ff6663f1a341e3ee70073244014988
SHA1 8ccfae8001536cc2386cda09cd257a29d5e61f81
SHA512 2f3da46a50003e13bb0b4d88a0eb7878fc1c1b98e091cc2a3352922c93b98a7f46f8ad07a77c7be8faec0ebb421e03a06321a949c9ce1d481f64a5366658d1ca
SSDEEP 6144:Qf+BLtABPDslRpZrQWT0IQZQZ9afTy8lI1D0yMj:rlmK0IQZQdx1Duj
MD5 SHA1 SHA512 SSDEEP

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Process.txt

Path C:\Users\Admin\AppData\Roaming\44\Process.txt
Size 1KB
SHA256 280dcb475b3bcdd4f0df51c96067b8027d76d86b456748d11f4c4c50a7e4e207
MD5 d12986a1731487dc61d4f1411008db6d
SHA1 36b019a2073741726c8a821ec08254d4ac7832b8
SHA512 0b445dea40539e61792cc65c7676fca08884bf2a16fb4a47a56837d0cd3e3704f3c9ebd27d4c6731f7c716087fcbd3538851f455345e30ad71abb27eabf3394a
MD5 SHA1 SHA512

Submit Download

Process.txt

Path C:\Users\Admin\AppData\Roaming\44\Process.txt
Size 1KB
SHA256 280dcb475b3bcdd4f0df51c96067b8027d76d86b456748d11f4c4c50a7e4e207
MD5 d12986a1731487dc61d4f1411008db6d
SHA1 36b019a2073741726c8a821ec08254d4ac7832b8
SHA512 0b445dea40539e61792cc65c7676fca08884bf2a16fb4a47a56837d0cd3e3704f3c9ebd27d4c6731f7c716087fcbd3538851f455345e30ad71abb27eabf3394a
MD5 SHA1 SHA512

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Process.txt

Path C:\Users\Admin\AppData\Roaming\44\Process.txt
Size 1KB
SHA256 280dcb475b3bcdd4f0df51c96067b8027d76d86b456748d11f4c4c50a7e4e207
MD5 d12986a1731487dc61d4f1411008db6d
SHA1 36b019a2073741726c8a821ec08254d4ac7832b8
SHA512 0b445dea40539e61792cc65c7676fca08884bf2a16fb4a47a56837d0cd3e3704f3c9ebd27d4c6731f7c716087fcbd3538851f455345e30ad71abb27eabf3394a
MD5 SHA1 SHA512

Submit Download

Process.txt

Path C:\Users\Admin\AppData\Roaming\44\Process.txt
Size 1KB
SHA256 280dcb475b3bcdd4f0df51c96067b8027d76d86b456748d11f4c4c50a7e4e207
MD5 d12986a1731487dc61d4f1411008db6d
SHA1 36b019a2073741726c8a821ec08254d4ac7832b8
SHA512 0b445dea40539e61792cc65c7676fca08884bf2a16fb4a47a56837d0cd3e3704f3c9ebd27d4c6731f7c716087fcbd3538851f455345e30ad71abb27eabf3394a
MD5 SHA1 SHA512

Submit Download

Process.txt

Path C:\Users\Admin\AppData\Roaming\44\Process.txt
Size 1KB
SHA256 f145e1a7d964fb07619538a1cacb070a20e1bcedc06f96573e6a8efe5430557e
MD5 f8f3617eca200bf4fd972dc185305e2f
SHA1 cbfbf499092dec60992f966a53d41dc2bc229e79
SHA512 66141a05d70a45204a46cd6bbf755bddfbcaa3e9017121d77ee8cc92e5a56ad7b670e19039dd18e2940aa6c51a02153c67a1e799b2712dc641e276f250688b54
MD5 SHA1 SHA512

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memory/872-14-0x000001AF15CF0000-0x000001AF15D3A000-memory.dmp

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memory/872-19-0x000001AF30360000-0x000001AF30370000-memory.dmp

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memory/872-15-0x00007FFDB3720000-0x00007FFDB41E1000-memory.dmp

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memory/872-137-0x00007FFDB3720000-0x00007FFDB41E1000-memory.dmp

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