Behavioral task
behavioral1
Sample
cstealer-main/CStealer_assets/upx/upx.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
cstealer-main/CStealer_assets/upx/upx.exe
Resource
win10v2004-20231215-en
Behavioral task
behavioral3
Sample
cstealer-main/cstealer.py
Resource
win7-20231129-en
Behavioral task
behavioral4
Sample
cstealer-main/cstealer.py
Resource
win10v2004-20231215-en
Behavioral task
behavioral5
Sample
cstealer-main/install.bat
Resource
win7-20231215-en
Behavioral task
behavioral6
Sample
cstealer-main/install.bat
Resource
win10v2004-20231215-en
General
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Target
cstealer-main.zip
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Size
1.6MB
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MD5
18dadaf224256c767b17bd8031bed717
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SHA1
9d65b1ce66b662d0a46e37540ebd56f3ee26282a
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SHA256
00ad91d1db69165437d6b26e81e24ba4ba4bf7156c30ec7deab602b72ec40786
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SHA512
858d6fbc3287fe78c1bb6bd996cfc9a21e730ce3dfd54e876d619987b23ee3eeaef1c77678f84fc449dabc3eeb0fc2d8338115be068b7420e4056341d625a84e
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SSDEEP
24576:Zmn7bJ0O0qKVpguPHg3csOHB5cPRkRzWZwmeFnQaRrlMJfvTbkrqAItD6b6D8J7t:Zah02KMcJRRzWZyQa3QMr8D8Yo
Malware Config
Signatures
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Patched UPX-packed file 1 IoCs
Sample is packed with UPX but required header fields are zeroed out to prevent unpacking with the default UPX tool.
resource yara_rule static1/unpack002/out.upx patched_upx -
resource yara_rule static1/unpack001/cstealer-main/CStealer_assets/upx/upx.exe upx -
Unsigned PE 2 IoCs
Checks for missing Authenticode signature.
resource unpack001/cstealer-main/CStealer_assets/upx/upx.exe unpack002/out.upx
Files
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cstealer-main.zip.zip
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cstealer-main/CStealer_assets/img/img1.png.png
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cstealer-main/CStealer_assets/img/logo.ico
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cstealer-main/CStealer_assets/img/ss1.png.png
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cstealer-main/CStealer_assets/img/ss2.png.png
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cstealer-main/CStealer_assets/img/ss3.png.png
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cstealer-main/CStealer_assets/img/ss4.png.png
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cstealer-main/CStealer_assets/img/ss5.png.png
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cstealer-main/CStealer_assets/upx/upx.exe.exe windows:4 windows x64 arch:x64
Headers
File Characteristics
IMAGE_FILE_RELOCS_STRIPPED
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LINE_NUMS_STRIPPED
IMAGE_FILE_LOCAL_SYMS_STRIPPED
IMAGE_FILE_LARGE_ADDRESS_AWARE
IMAGE_FILE_DEBUG_STRIPPED
Sections
UPX0 Size: - Virtual size: 1.5MB
IMAGE_SCN_CNT_UNINITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
UPX1 Size: 522KB - Virtual size: 524KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.rsrc Size: 2KB - Virtual size: 4KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
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out.upx.exe windows:4 windows x64 arch:x64
Headers
File Characteristics
IMAGE_FILE_RELOCS_STRIPPED
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LINE_NUMS_STRIPPED
IMAGE_FILE_LOCAL_SYMS_STRIPPED
IMAGE_FILE_LARGE_ADDRESS_AWARE
IMAGE_FILE_DEBUG_STRIPPED
Sections
.text Size: 850KB - Virtual size: 849KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.data Size: 3KB - Virtual size: 2KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.rdata Size: 1.1MB - Virtual size: 1.1MB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.pdata Size: 34KB - Virtual size: 33KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.xdata Size: 35KB - Virtual size: 35KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.bss Size: - Virtual size: 12KB
IMAGE_SCN_CNT_UNINITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.idata Size: 6KB - Virtual size: 5KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.CRT Size: 512B - Virtual size: 112B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.tls Size: 512B - Virtual size: 16B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.rsrc Size: 1KB - Virtual size: 1KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
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cstealer-main/LICENSE
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cstealer-main/README.md
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cstealer-main/builder.pyw
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cstealer-main/cstealer.py
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cstealer-main/install.bat
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cstealer-main/requirements.txt