Static task
static1
Behavioral task
behavioral1
Sample
csrss.exe
Resource
win7-20230621-en
Behavioral task
behavioral2
Sample
csrss.exe
Resource
win10v2004-20230621-en
General
-
Target
csrss.exe.7z
-
Size
22KB
-
MD5
27bdf5778b160afb6ef7369eff8b704e
-
SHA1
6310f1437f28d6f8b3bcf93fc1ad8e578628396d
-
SHA256
4368e594f35a212fa9d375622671c8e6fbd026551647ae22d1bc8c2d65ae7a48
-
SHA512
35821831f912150f1b235308d30e5f7f236972fd78638b0203c9db89c97b6396453c822e8b92d00924b5fecf1bd46267e8cb3fc339eb6acb13ad83292ccae246
-
SSDEEP
384:PeX62US2ktnvAg5jrHkHqYWHN5inNi12xn0nFyH29pYL4tUyhdp4FspPMHCSr0Mt:2K81HgjQN0NTn0nkL4tUyEcPEz+aj
Malware Config
Signatures
-
Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource unpack001/csrss.exe
Files
-
csrss.exe.7z.7z
Password: infected
-
csrss.exe.exe windows x86
Password: infected
fb691caab6941b1a672a2276ba2100ec
Headers
File Characteristics
IMAGE_FILE_RELOCS_STRIPPED
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LINE_NUMS_STRIPPED
IMAGE_FILE_LOCAL_SYMS_STRIPPED
IMAGE_FILE_32BIT_MACHINE
Imports
msvbvm60
__vbaStrI2
_CIcos
_adj_fptan
__vbaFreeVar
__vbaStrVarMove
__vbaLenBstr
__vbaFreeVarList
__vbaPut3
_adj_fdiv_m64
__vbaFreeObjList
_adj_fprem1
ord518
__vbaStrCat
__vbaSetSystemError
__vbaHresultCheckObj
_adj_fdiv_m32
__vbaForEachCollObj
__vbaOnError
__vbaObjSet
_adj_fdiv_m16i
__vbaObjSetAddref
_adj_fdivr_m16i
ord598
__vbaVarTstLt
_CIsin
ord709
ord632
__vbaNextEachCollObj
__vbaChkstk
ord526
__vbaFileClose
EVENT_SINK_AddRef
__vbaStrCmp
ord529
__vbaVarTstEq
__vbaI2I4
__vbaObjVar
DllFunctionCall
_adj_fpatan
EVENT_SINK_Release
_CIsqrt
EVENT_SINK_QueryInterface
__vbaExceptHandler
__vbaStrToUnicode
_adj_fprem
_adj_fdivr_m64
ord716
__vbaFPException
__vbaVarCat
_CIlog
__vbaErrorOverflow
__vbaFileOpen
__vbaNew2
__vbaInStr
ord648
_adj_fdiv_m32i
_adj_fdivr_m32i
__vbaVarSetObj
__vbaStrCopy
__vbaFreeStrList
_adj_fdivr_m32
_adj_fdiv_r
ord578
ord685
ord100
__vbaVarTstNe
__vbaI4Var
__vbaLateMemCall
__vbaVarDup
__vbaStrToAnsi
__vbaVarCopy
ord616
ord617
_CIatan
__vbaStrMove
__vbaCastObj
ord619
_allmul
_CItan
_CIexp
__vbaFreeObj
__vbaFreeStr
Sections
.text Size: 144KB - Virtual size: 141KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.data Size: 4KB - Virtual size: 2KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.rsrc Size: 28KB - Virtual size: 104KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE