44caliber | c75b299ee8d5af6943de2b98cd9d36389cf7f98cd36e68239afd520e5bbfec52

Analysis

max time kernel
120s
max time network
127s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
23/02/2025, 20:16

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General

Target

c75b299ee8d5af6943de2b98cd9d36389cf7f98cd36e68239afd520e5bbfec52.exe
Size

11.1MB
MD5

f43381c52c7d3eab6347894ff1bf6d35
SHA1

097a6a49f8ba7c10d7cc0ddca69c5c9036fc5213
SHA256

c75b299ee8d5af6943de2b98cd9d36389cf7f98cd36e68239afd520e5bbfec52
SHA512

bd05ef1fc7279445fa9ad50dd2400aaf7bc2643c5d13cabca20204afeaa77a4ac36c99395765ba85df3f401762ccf002327bd99d92018e9db669654ee3c5c874
SSDEEP

196608:fFqdGKeCIfqQq1QsKW7nSxXJQTMypF24oTq8MyuSIoQIwunHpm7oDvqU9rvJSHgB:MGKeCnQq1QsKC9TxYbJuSIo/f9r0gyM

Score

10^/10

44caliber pyinstaller spyware stealer

Malware Config

Extracted

Family

44caliber

https://discordapp.com/api/webhooks/1341705749000097873/Cm8XbJ9POoDIJFj-kHv4cNQ57rKrRSTTynrXpCZxyy6LbWHN-1RW5g-4NuUtr-gmtiFT

Signatures

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

Executes dropped EXE 3 IoCs

pid	Process
2084	1.exe
3008	2.exe
1188	2.exe

Loads dropped DLL 11 IoCs

pid	Process
2240	c75b299ee8d5af6943de2b98cd9d36389cf7f98cd36e68239afd520e5bbfec52.exe
3008	2.exe
1188	2.exe
1188	2.exe
1188	2.exe
1188	2.exe
1188	2.exe
1188	2.exe
1188	2.exe
1272	Process not Found
1272	Process not Found

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials In Files
T1552.001

Detects Pyinstaller 1 IoCs

pyinstaller

resource	yara_rule
behavioral1/files/0x0007000000016fe5-38.dat	pyinstaller

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2084	1.exe
2084	1.exe
2084	1.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2084	1.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2240 wrote to memory of 2084	2240	c75b299ee8d5af6943de2b98cd9d36389cf7f98cd36e68239afd520e5bbfec52.exe	30
PID 2240 wrote to memory of 2084	2240	c75b299ee8d5af6943de2b98cd9d36389cf7f98cd36e68239afd520e5bbfec52.exe	30
PID 2240 wrote to memory of 2084	2240	c75b299ee8d5af6943de2b98cd9d36389cf7f98cd36e68239afd520e5bbfec52.exe	30
PID 2084 wrote to memory of 3068	2084	1.exe	32
PID 2084 wrote to memory of 3068	2084	1.exe	32
PID 2084 wrote to memory of 3068	2084	1.exe	32
PID 2240 wrote to memory of 3008	2240	c75b299ee8d5af6943de2b98cd9d36389cf7f98cd36e68239afd520e5bbfec52.exe	33
PID 2240 wrote to memory of 3008	2240	c75b299ee8d5af6943de2b98cd9d36389cf7f98cd36e68239afd520e5bbfec52.exe	33
PID 2240 wrote to memory of 3008	2240	c75b299ee8d5af6943de2b98cd9d36389cf7f98cd36e68239afd520e5bbfec52.exe	33
PID 3008 wrote to memory of 1188	3008	2.exe	34
PID 3008 wrote to memory of 1188	3008	2.exe	34
PID 3008 wrote to memory of 1188	3008	2.exe	34

C:\Users\Admin\AppData\Local\Temp\c75b299ee8d5af6943de2b98cd9d36389cf7f98cd36e68239afd520e5bbfec52.exe
"C:\Users\Admin\AppData\Local\Temp\c75b299ee8d5af6943de2b98cd9d36389cf7f98cd36e68239afd520e5bbfec52.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2240
- C:\Users\Admin\AppData\Local\Temp\RarSFX0\1.exe
  "C:\Users\Admin\AppData\Local\Temp\RarSFX0\1.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2084
- - C:\Windows\system32\WerFault.exe
    C:\Windows\system32\WerFault.exe -u -p 2084 -s 1196
    3⤵
    PID:3068
- C:\Users\Admin\AppData\Local\Temp\RarSFX0\2.exe
  "C:\Users\Admin\AppData\Local\Temp\RarSFX0\2.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:3008
- - C:\Users\Admin\AppData\Local\Temp\RarSFX0\2.exe
    "C:\Users\Admin\AppData\Local\Temp\RarSFX0\2.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    PID:1188

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\RarSFX0\1.exe

Filesize
303KB

MD5
07dd2a2a803e0bc5e994555565969fae

SHA1
80653c6680847c8bdf4d00345ff64747ec780673

SHA256
255655c9809e1753b1629c6521f8ba40a9c528c47255cceb56d1739a0563b117

SHA512
21216efc3b70f60323297246d4ccbdb54d79c81e605d26204382c55c44ae48d3a39debf58ebd75d5bdf634d7bcad9053b4ee26b90ef9f15233b7bec48abf68bf

Download Submit
\Users\Admin\AppData\Local\Temp\RarSFX0\2.exe

Filesize
10.8MB

MD5
a278b45805aed863e918605d95af8dc2

SHA1
50d745cc1aa8304245545211dd5399fee7a44c87

SHA256
6ebf010667c22f096e4748d46a86967f130b01646349cbdadc43c9899b77da0f

SHA512
7ecabf731a580444b46605e27477577d7ef0c76160592adb076643da2f2e8d2d9383317424405c35396fdbbcfcda2a16934d11eddda5ef0c6283559d6fb28920

Download Submit
\Users\Admin\AppData\Local\Temp\_MEI30082\api-ms-win-core-file-l1-2-0.dll

Filesize
21KB

MD5
1c58526d681efe507deb8f1935c75487

SHA1
0e6d328faf3563f2aae029bc5f2272fb7a742672

SHA256
ef13dce8f71173315dfc64ab839b033ab19a968ee15230e9d4d2c9d558efeee2

SHA512
8edb9a0022f417648e2ece9e22c96e2727976332025c3e7d8f15bcf6d7d97e680d1bf008eb28e2e0bd57787dcbb71d38b2deb995b8edc35fa6852ab1d593f3d1

Download Submit
\Users\Admin\AppData\Local\Temp\_MEI30082\api-ms-win-core-file-l2-1-0.dll

Filesize
18KB

MD5
bfffa7117fd9b1622c66d949bac3f1d7

SHA1
402b7b8f8dcfd321b1d12fc85a1ee5137a5569b2

SHA256
1ea267a2e6284f17dd548c6f2285e19f7edb15d6e737a55391140ce5cb95225e

SHA512
b319cc7b436b1be165cdf6ffcab8a87fe29de78f7e0b14c8f562be160481fb5483289bd5956fdc1d8660da7a3f86d8eede35c6cc2b7c3d4c852decf4b2dcdb7f

Download Submit
\Users\Admin\AppData\Local\Temp\_MEI30082\api-ms-win-core-localization-l1-2-0.dll

Filesize
21KB

MD5
724223109e49cb01d61d63a8be926b8f

SHA1
072a4d01e01dbbab7281d9bd3add76f9a3c8b23b

SHA256
4e975f618df01a492ae433dff0dd713774d47568e44c377ceef9e5b34aad1210

SHA512
19b0065b894dc66c30a602c9464f118e7f84d83010e74457d48e93aaca4422812b093b15247b24d5c398b42ef0319108700543d13f156067b169ccfb4d7b6b7c

Download Submit
\Users\Admin\AppData\Local\Temp\_MEI30082\api-ms-win-core-processthreads-l1-1-1.dll

Filesize
21KB

MD5
517eb9e2cb671ae49f99173d7f7ce43f

SHA1
4ccf38fed56166ddbf0b7efb4f5314c1f7d3b7ab

SHA256
57cc66bf0909c430364d35d92b64eb8b6a15dc201765403725fe323f39e8ac54

SHA512
492be2445b10f6bfe6c561c1fc6f5d1af6d1365b7449bc57a8f073b44ae49c88e66841f5c258b041547fcd33cbdcb4eb9dd3e24f0924db32720e51651e9286be

Download Submit
\Users\Admin\AppData\Local\Temp\_MEI30082\api-ms-win-core-timezone-l1-1-0.dll

Filesize
21KB

MD5
d12403ee11359259ba2b0706e5e5111c

SHA1
03cc7827a30fd1dee38665c0cc993b4b533ac138

SHA256
f60e1751a6ac41f08e46480bf8e6521b41e2e427803996b32bdc5e78e9560781

SHA512
9004f4e59835af57f02e8d9625814db56f0e4a98467041da6f1367ef32366ad96e0338d48fff7cc65839a24148e2d9989883bcddc329d9f4d27cae3f843117d0

Download Submit
\Users\Admin\AppData\Local\Temp\_MEI30082\python313.dll

Filesize
5.8MB

MD5
501080884bed38cb8801a307c9d7b7b4

SHA1
881b250cc8f4fa4f75111ac557a4fde8e1e217af

SHA256
bf68cf819a1e865170430c10e91c18b427aef88db1da1742020443864aa2b749

SHA512
63d74a4871d1c72c2a79ae8a5d380070f9d2128c16949c3ad36c9862fcc4dab738137ed3d51caf0bc46b36655f8bd8a2d425d68200123415ee8d4de0e1cbebc9

Download Submit
\Users\Admin\AppData\Local\Temp\_MEI30082\ucrtbase.dll

Filesize
992KB

MD5
0e0bac3d1dcc1833eae4e3e4cf83c4ef

SHA1
4189f4459c54e69c6d3155a82524bda7549a75a6

SHA256
8a91052ef261b5fbf3223ae9ce789af73dfe1e9b0ba5bdbc4d564870a24f2bae

SHA512
a45946e3971816f66dd7ea3788aacc384a9e95011500b458212dc104741315b85659e0d56a41570731d338bdf182141c093d3ced222c007038583ceb808e26fd

Download Submit
memory/2084-36-0x000007FEF5DD0000-0x000007FEF67BC000-memory.dmp

Filesize
9.9MB

Download
memory/2084-35-0x000007FEF5DD0000-0x000007FEF67BC000-memory.dmp

Filesize
9.9MB

Download
memory/2084-16-0x0000000000F00000-0x0000000000F52000-memory.dmp

Filesize
328KB

Download
memory/2084-15-0x000007FEF5DD3000-0x000007FEF5DD4000-memory.dmp

Filesize
4KB

Download
memory/2240-180-0x0000000002DA0000-0x0000000002DB0000-memory.dmp

Filesize
64KB

Download