dafb6e564c0e304522651933856bc6cecc725a4b27abcc6c8624d30e663de582

Analysis

max time kernel
15s
max time network
16s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
27-05-2024 19:27

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General

Target

bigsigma.exe
Size

20.5MB
MD5

17496afa2683ec2b09a2b6f0866c3409
SHA1

7648ab480a7ac80dd37b52a300f78d509b1f0c76
SHA256

dafb6e564c0e304522651933856bc6cecc725a4b27abcc6c8624d30e663de582
SHA512

2af48464987b9b9b53864f5de0cfd2acbc1310adaa480c58aa9b705f54f63b337a3b6f0e5e4011876ed2560e20136e49c7f9139f4a0270499b3050aa5dcddba9
SSDEEP

393216:Ho9DVuMu8PTOjh2Jp5MVRHdOEnBSVkRIrY87iwO12nsDVCORxSPxYIbpnX5QX1Og:I9puJ5hXfzcY87iwLiVDSPxJdpQXt

Score

7^/10

upx

Malware Config

Signatures

Loads dropped DLL 7 IoCs

Processes:

bigsigma.exe

pid process

2500 bigsigma.exe
2500 bigsigma.exe
2500 bigsigma.exe
2500 bigsigma.exe
2500 bigsigma.exe
2500 bigsigma.exe
2500 bigsigma.exe

pid	process
2500	bigsigma.exe
2500	bigsigma.exe
2500	bigsigma.exe
2500	bigsigma.exe
2500	bigsigma.exe
2500	bigsigma.exe
2500	bigsigma.exe

UPX packed file 1 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\_MEI22322\python39.dll	upx

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

bigsigma.exe

description	pid	process	target process
PID 2232 wrote to memory of 2500	2232	bigsigma.exe	bigsigma.exe
PID 2232 wrote to memory of 2500	2232	bigsigma.exe	bigsigma.exe
PID 2232 wrote to memory of 2500	2232	bigsigma.exe	bigsigma.exe

C:\Users\Admin\AppData\Local\Temp\bigsigma.exe
"C:\Users\Admin\AppData\Local\Temp\bigsigma.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2232
- C:\Users\Admin\AppData\Local\Temp\bigsigma.exe
  "C:\Users\Admin\AppData\Local\Temp\bigsigma.exe"
  2⤵
  - Loads dropped DLL
  PID:2500

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\_MEI22322\api-ms-win-core-file-l1-2-0.dll

Filesize
21KB

MD5
bcb8b9f6606d4094270b6d9b2ed92139

SHA1
bd55e985db649eadcb444857beed397362a2ba7b

SHA256
fa18d63a117153e2ace5400ed89b0806e96f0627d9db935906be9294a3038118

SHA512
869b2b38fd528b033b3ec17a4144d818e42242b83d7be48e2e6da6992111758b302f48f52e0dd76becb526a90a2b040ce143c6d4f0e009a513017f06b9a8f2b9

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI22322\api-ms-win-core-file-l2-1-0.dll

Filesize
18KB

MD5
bfffa7117fd9b1622c66d949bac3f1d7

SHA1
402b7b8f8dcfd321b1d12fc85a1ee5137a5569b2

SHA256
1ea267a2e6284f17dd548c6f2285e19f7edb15d6e737a55391140ce5cb95225e

SHA512
b319cc7b436b1be165cdf6ffcab8a87fe29de78f7e0b14c8f562be160481fb5483289bd5956fdc1d8660da7a3f86d8eede35c6cc2b7c3d4c852decf4b2dcdb7f

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI22322\api-ms-win-core-localization-l1-2-0.dll

Filesize
21KB

MD5
20ddf543a1abe7aee845de1ec1d3aa8e

SHA1
0eaf5de57369e1db7f275a2fffd2d2c9e5af65bf

SHA256
d045a72c3e4d21165e9372f76b44ff116446c1e0c221d9cea3ab0a1134a310e8

SHA512
96dd48df315a7eea280ca3da0965a937a649ee77a82a1049e3d09b234439f7d927d7fb749073d7af1b23dadb643978b70dcdadc6c503fe850b512b0c9c1c78dd

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI22322\api-ms-win-core-processthreads-l1-1-1.dll

Filesize
21KB

MD5
4380d56a3b83ca19ea269747c9b8302b

SHA1
0c4427f6f0f367d180d37fc10ecbe6534ef6469c

SHA256
a79c7f86462d8ab8a7b73a3f9e469514f57f9fe456326be3727352b092b6b14a

SHA512
1c29c335c55f5f896526c8ee0f7160211fd457c1f1b98915bcc141112f8a730e1a92391ab96688cbb7287e81e6814cc86e3b057e0a6129cbb02892108bfafaf4

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI22322\api-ms-win-core-timezone-l1-1-0.dll

Filesize
21KB

MD5
2554060f26e548a089cab427990aacdf

SHA1
8cc7a44a16d6b0a6b7ed444e68990ff296d712fe

SHA256
5ab003e899270b04abc7f67be953eaccf980d5bbe80904c47f9aaf5d401bb044

SHA512
fd4d5a7fe4da77b0222b040dc38e53f48f7a3379f69e2199639b9f330b2e55939d89ce8361d2135182b607ad75e58ee8e34b90225143927b15dcc116b994c506

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI22322\python39.dll

Filesize
1.4MB

MD5
a88b66a1684ca8e1157d2d2f1b0f3d72

SHA1
891ab591bb39142c1b1be2afc575f71000f513a6

SHA256
72c746c69eb376265d3e4d7cf40ad5ae72fa2235a9ff6ea2602986a3d04be389

SHA512
15ee5bf5a5545cc6038dfd6e0d83e5116d355f30cd36e3556b354270b45bb05aac62f5543f8a0c698f4829102c408383374306c4e278156e6139555f61410f2b

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI22322\ucrtbase.dll

Filesize
992KB

MD5
0e0bac3d1dcc1833eae4e3e4cf83c4ef

SHA1
4189f4459c54e69c6d3155a82524bda7549a75a6

SHA256
8a91052ef261b5fbf3223ae9ce789af73dfe1e9b0ba5bdbc4d564870a24f2bae

SHA512
a45946e3971816f66dd7ea3788aacc384a9e95011500b458212dc104741315b85659e0d56a41570731d338bdf182141c093d3ced222c007038583ceb808e26fd

Download Submit
memory/2500-170-0x000007FEF5AC0000-0x000007FEF5F49000-memory.dmp

Filesize
4.5MB

Download