44caliber | 3f8c834a6f95f5128aa4c916bbb51afcfe7d1c6e79e93b9c750862fbacf8d657

General

Target

3f8c834a6f95f5128aa4c916bbb51afcfe7d1c6e79e93b9c750862fbacf8d657.exe
Size

3.4MB
MD5

5c48167b9b7f4ca64ec8ffc3dac52f4f
SHA1

798c3b6432e0a6c7ca3565847f2ae6132ce273e2
SHA256

3f8c834a6f95f5128aa4c916bbb51afcfe7d1c6e79e93b9c750862fbacf8d657
SHA512

41d9dfe7e15f372e271b87bb1c28a16af7259d5dd76fe9e1d936de8ef34200504afb4a505d6c96722fc2c29c6a032fa81f094ae1969d13f4f55bdcf8ed2faace
SSDEEP

98304:U3GZi+althnATSq/Mr0E6QpT3WF/zYpDLGf8xV3XVV4l94e/YjW:U3G0+althATSCil3acME/6L/T

Score

10^/10

44caliber stealer

Malware Config

Extracted

Family

44caliber

C2

https://discord.com/api/webhooks/1250616070168121415/5zPJF3YAMfzIYMNhBy0XbjWdMsVRmd5PNYzbuTK55XQkKeKyHmQ5hnEfKgffl6GKC84q

Signatures

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

Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 2 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\RarSFX0\Loader.exe	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/2152-23-0x00000000004F0000-0x00000000006CC000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers

Detects executables Discord URL observed in first stage droppers 2 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\RarSFX0\Loader.exe	INDICATOR_SUSPICIOUS_EXE_DiscordURL
behavioral2/memory/2152-23-0x00000000004F0000-0x00000000006CC000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_DiscordURL

Detects executables packed with ConfuserEx Mod 2 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\RarSFX0\Siticone.Desktop.UI.dll	INDICATOR_EXE_Packed_ConfuserEx
behavioral2/memory/2152-30-0x0000000005CD0000-0x00000000060D6000-memory.dmp	INDICATOR_EXE_Packed_ConfuserEx

Detects executables referencing Discord tokens regular expressions 2 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\RarSFX0\Loader.exe	INDICATOR_SUSPICIOUS_EXE_Discord_Regex
behavioral2/memory/2152-23-0x00000000004F0000-0x00000000006CC000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_Discord_Regex

Detects executables referencing credit card regular expressions 2 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\RarSFX0\Loader.exe	INDICATOR_SUSPICIOUS_EXE_CC_Regex
behavioral2/memory/2152-23-0x00000000004F0000-0x00000000006CC000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_CC_Regex

Detects executables referencing many VPN software clients. Observed in infosteslers 2 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\RarSFX0\Loader.exe	INDICATOR_SUSPICIOUS_EXE_References_VPN
behavioral2/memory/2152-23-0x00000000004F0000-0x00000000006CC000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_References_VPN

Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers 2 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\RarSFX0\Loader.exe	INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store
behavioral2/memory/2152-23-0x00000000004F0000-0x00000000006CC000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store

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

Processes:

3f8c834a6f95f5128aa4c916bbb51afcfe7d1c6e79e93b9c750862fbacf8d657.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3665033694-1447845302-680750983-1000\Control Panel\International\Geo\Nation	3f8c834a6f95f5128aa4c916bbb51afcfe7d1c6e79e93b9c750862fbacf8d657.exe

Executes dropped EXE 1 IoCs

Processes:

Loader.exe

pid process

2152 Loader.exe
Loads dropped DLL 4 IoCs

Processes:

Loader.exe

pid process

2152 Loader.exe
2152 Loader.exe
2152 Loader.exe
2152 Loader.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 31 IoCs

Processes:

Loader.exe

pid	process
2152	Loader.exe
2152	Loader.exe
2152	Loader.exe
2152	Loader.exe
2152	Loader.exe
2152	Loader.exe
2152	Loader.exe
2152	Loader.exe
2152	Loader.exe
2152	Loader.exe
2152	Loader.exe
2152	Loader.exe
2152	Loader.exe
2152	Loader.exe
2152	Loader.exe
2152	Loader.exe
2152	Loader.exe
2152	Loader.exe
2152	Loader.exe
2152	Loader.exe
2152	Loader.exe
2152	Loader.exe
2152	Loader.exe
2152	Loader.exe
2152	Loader.exe
2152	Loader.exe
2152	Loader.exe
2152	Loader.exe
2152	Loader.exe
2152	Loader.exe
2152	Loader.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Loader.exe

description pid process

Token: SeDebugPrivilege 2152 Loader.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

Loader.exe

pid process

2152 Loader.exe
2152 Loader.exe

description	pid	process
Token: SeDebugPrivilege	2152	Loader.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

3f8c834a6f95f5128aa4c916bbb51afcfe7d1c6e79e93b9c750862fbacf8d657.exe

description	pid	process	target process
PID 3496 wrote to memory of 2152	3496	3f8c834a6f95f5128aa4c916bbb51afcfe7d1c6e79e93b9c750862fbacf8d657.exe	Loader.exe
PID 3496 wrote to memory of 2152	3496	3f8c834a6f95f5128aa4c916bbb51afcfe7d1c6e79e93b9c750862fbacf8d657.exe	Loader.exe
PID 3496 wrote to memory of 2152	3496	3f8c834a6f95f5128aa4c916bbb51afcfe7d1c6e79e93b9c750862fbacf8d657.exe	Loader.exe

C:\Users\Admin\AppData\Local\Temp\3f8c834a6f95f5128aa4c916bbb51afcfe7d1c6e79e93b9c750862fbacf8d657.exe
"C:\Users\Admin\AppData\Local\Temp\3f8c834a6f95f5128aa4c916bbb51afcfe7d1c6e79e93b9c750862fbacf8d657.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3496

C:\Users\Admin\AppData\Local\Temp\RarSFX0\Loader.exe
"C:\Users\Admin\AppData\Local\Temp\RarSFX0\Loader.exe"
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:2152

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4424,i,17949988676391029604,13756926835471203788,262144 --variations-seed-version --mojo-platform-channel-handle=4104 /prefetch:8
1⤵
PID:3980

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\RarSFX0\Loader.exe
Filesize
1.8MB

MD5
bb9840f7382dd86e6b528da7eca4282e

SHA1
312520506e7444ca7952fca5473b61ca18ea3a94

SHA256
38c69a36a8add6d7f523719ec0909867e0a4f2df0041c0f654cdb49c6b716e3b

SHA512
8018b864da28b383e127d209c458281eca62ddb6c74a97f9c225938f21f87a2833c9fc828123c8014b9b7b5b576fc7c9e827f1d873e511722876ee559e6ee1e7

Download Submit
C:\Users\Admin\AppData\Local\Temp\RarSFX0\Newtonsoft.Json.dll
Filesize
695KB

MD5
195ffb7167db3219b217c4fd439eedd6

SHA1
1e76e6099570ede620b76ed47cf8d03a936d49f8

SHA256
e1e27af7b07eeedf5ce71a9255f0422816a6fc5849a483c6714e1b472044fa9d

SHA512
56eb7f070929b239642dab729537dde2c2287bdb852ad9e80b5358c74b14bc2b2dded910d0e3b6304ea27eb587e5f19db0a92e1cbae6a70fb20b4ef05057e4ac

Download Submit
C:\Users\Admin\AppData\Local\Temp\RarSFX0\Siticone.Desktop.UI.dll
Filesize
4.0MB

MD5
1582aa45d981e0e569c6e05698642b30

SHA1
763506f312a186c55a04ef6a16ad7e867c394097

SHA256
21eecaf504b7fe787a45f4aa8f8f36dacfc3ab1d75624dfb41827cdef2a9a589

SHA512
278a7a4e2b9d82528200b9f92244db3f228187d15c36fd169deb927e343bc4d0bb29c9dba496f86558aea4f4deb44d1e47a41d5598c0b375d99ad9fbe99cec34

Download Submit
memory/2152-33-0x0000000075230000-0x00000000759E0000-memory.dmp

Filesize
7.7MB

Download
memory/2152-22-0x000000007523E000-0x000000007523F000-memory.dmp

Filesize
4KB

Download
memory/2152-26-0x0000000005020000-0x0000000005032000-memory.dmp

Filesize
72KB

Download
memory/2152-24-0x0000000005720000-0x0000000005CC4000-memory.dmp

Filesize
5.6MB

Download
memory/2152-30-0x0000000005CD0000-0x00000000060D6000-memory.dmp

Filesize
4.0MB

Download
memory/2152-31-0x0000000005530000-0x000000000553A000-memory.dmp

Filesize
40KB

Download
memory/2152-32-0x0000000075230000-0x00000000759E0000-memory.dmp

Filesize
7.7MB

Download
memory/2152-23-0x00000000004F0000-0x00000000006CC000-memory.dmp

Filesize
1.9MB

Download
memory/2152-34-0x0000000075230000-0x00000000759E0000-memory.dmp

Filesize
7.7MB

Download
memory/2152-25-0x0000000005070000-0x0000000005102000-memory.dmp

Filesize
584KB

Download
memory/2152-38-0x0000000008F60000-0x0000000009012000-memory.dmp

Filesize
712KB

Download
memory/2152-39-0x0000000008ED0000-0x0000000008EF2000-memory.dmp

Filesize
136KB

Download
memory/2152-40-0x0000000009020000-0x0000000009374000-memory.dmp

Filesize
3.3MB

Download
memory/2152-42-0x0000000009380000-0x00000000093BC000-memory.dmp

Filesize
240KB

Download
memory/2152-43-0x000000007523E000-0x000000007523F000-memory.dmp

Filesize
4KB

Download
memory/2152-44-0x0000000075230000-0x00000000759E0000-memory.dmp

Filesize
7.7MB

Download
memory/2152-45-0x0000000075230000-0x00000000759E0000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads