nymaim | 8cfda84a278b5427942be71112f790b91b29fd782e8a462a37b5f8194bf621a2

Analysis

max time kernel
77s
max time network
82s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
23-11-2022 13:02

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General

Target

file.exe
Size

1.4MB
MD5

d042c1d9563bec15fa9b4d42c5a9efc1
SHA1

e55c427ef95d2be30a3818ce1dfd36be6fa84600
SHA256

8cfda84a278b5427942be71112f790b91b29fd782e8a462a37b5f8194bf621a2
SHA512

7047bca31534b566c0102fc48f3680db97e1aa0fa77bb73497b3b933b03bc2a38ad541723afa68293cad63a4a9793fe33cc8bf0d2f725bb3bae75cb1b1c39733
SSDEEP

24576:RizWMMGW2twZ06yojH+D5v5+5+6ilkGq7aKTIopzZIHafeTIGCz37jJOt4TJKbAQ:6rL96yPm5+1STIopzZIHafeT30cuhNeZ

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

45.139.105.171

85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim
Executes dropped EXE 3 IoCs

Processes:

is-VMK1P.tmpPrintFolders.exelTpbbok4jEg.exe

pid process

1256 is-VMK1P.tmp
1748 PrintFolders.exe
1316 lTpbbok4jEg.exe

pid	process
1256	is-VMK1P.tmp
1748	PrintFolders.exe
1316	lTpbbok4jEg.exe

Loads dropped DLL 10 IoCs

Processes:

file.exeis-VMK1P.tmpPrintFolders.exelTpbbok4jEg.exe

pid	process
1356	file.exe
1256	is-VMK1P.tmp
1256	is-VMK1P.tmp
1256	is-VMK1P.tmp
1256	is-VMK1P.tmp
1748	PrintFolders.exe
1748	PrintFolders.exe
1748	PrintFolders.exe
1316	lTpbbok4jEg.exe
1316	lTpbbok4jEg.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 9 IoCs

Processes:

is-VMK1P.tmp

description	ioc	process
File created	C:\Program Files (x86)\PrintFolders\is-DEFGN.tmp	is-VMK1P.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-VMK1P.tmp
File created	C:\Program Files (x86)\PrintFolders\is-LR1SD.tmp	is-VMK1P.tmp
File created	C:\Program Files (x86)\PrintFolders\is-VHH1D.tmp	is-VMK1P.tmp
File created	C:\Program Files (x86)\PrintFolders\is-ISDCI.tmp	is-VMK1P.tmp
File created	C:\Program Files (x86)\PrintFolders\is-MB642.tmp	is-VMK1P.tmp
File created	C:\Program Files (x86)\PrintFolders\is-4MQMO.tmp	is-VMK1P.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-VMK1P.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-VMK1P.tmp

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

System Information Discovery
T1082
Kills process with taskkill 1 IoCs
evasion

Processes:

taskkill.exe

pid process

1144 taskkill.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

PrintFolders.exe

pid process

1748 PrintFolders.exe
1748 PrintFolders.exe
1748 PrintFolders.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

is-VMK1P.tmptaskkill.exe

description pid process

Token: SeRestorePrivilege 1256 is-VMK1P.tmp
Token: SeBackupPrivilege 1256 is-VMK1P.tmp
Token: SeDebugPrivilege 1144 taskkill.exe

pid	process
1144	taskkill.exe

pid	process
1748	PrintFolders.exe
1748	PrintFolders.exe
1748	PrintFolders.exe

description	pid	process
Token: SeRestorePrivilege	1256	is-VMK1P.tmp
Token: SeBackupPrivilege	1256	is-VMK1P.tmp
Token: SeDebugPrivilege	1144	taskkill.exe

Suspicious use of WriteProcessMemory 35 IoCs

Processes:

file.exeis-VMK1P.tmpPrintFolders.execmd.exe

description	pid	process	target process
PID 1356 wrote to memory of 1256	1356	file.exe	is-VMK1P.tmp
PID 1356 wrote to memory of 1256	1356	file.exe	is-VMK1P.tmp
PID 1356 wrote to memory of 1256	1356	file.exe	is-VMK1P.tmp
PID 1356 wrote to memory of 1256	1356	file.exe	is-VMK1P.tmp
PID 1356 wrote to memory of 1256	1356	file.exe	is-VMK1P.tmp
PID 1356 wrote to memory of 1256	1356	file.exe	is-VMK1P.tmp
PID 1356 wrote to memory of 1256	1356	file.exe	is-VMK1P.tmp
PID 1256 wrote to memory of 1748	1256	is-VMK1P.tmp	PrintFolders.exe
PID 1256 wrote to memory of 1748	1256	is-VMK1P.tmp	PrintFolders.exe
PID 1256 wrote to memory of 1748	1256	is-VMK1P.tmp	PrintFolders.exe
PID 1256 wrote to memory of 1748	1256	is-VMK1P.tmp	PrintFolders.exe
PID 1256 wrote to memory of 1748	1256	is-VMK1P.tmp	PrintFolders.exe
PID 1256 wrote to memory of 1748	1256	is-VMK1P.tmp	PrintFolders.exe
PID 1256 wrote to memory of 1748	1256	is-VMK1P.tmp	PrintFolders.exe
PID 1748 wrote to memory of 1316	1748	PrintFolders.exe	lTpbbok4jEg.exe
PID 1748 wrote to memory of 1316	1748	PrintFolders.exe	lTpbbok4jEg.exe
PID 1748 wrote to memory of 1316	1748	PrintFolders.exe	lTpbbok4jEg.exe
PID 1748 wrote to memory of 1316	1748	PrintFolders.exe	lTpbbok4jEg.exe
PID 1748 wrote to memory of 1316	1748	PrintFolders.exe	lTpbbok4jEg.exe
PID 1748 wrote to memory of 1316	1748	PrintFolders.exe	lTpbbok4jEg.exe
PID 1748 wrote to memory of 1316	1748	PrintFolders.exe	lTpbbok4jEg.exe
PID 1748 wrote to memory of 1064	1748	PrintFolders.exe	cmd.exe
PID 1748 wrote to memory of 1064	1748	PrintFolders.exe	cmd.exe
PID 1748 wrote to memory of 1064	1748	PrintFolders.exe	cmd.exe
PID 1748 wrote to memory of 1064	1748	PrintFolders.exe	cmd.exe
PID 1748 wrote to memory of 1064	1748	PrintFolders.exe	cmd.exe
PID 1748 wrote to memory of 1064	1748	PrintFolders.exe	cmd.exe
PID 1748 wrote to memory of 1064	1748	PrintFolders.exe	cmd.exe
PID 1064 wrote to memory of 1144	1064	cmd.exe	taskkill.exe
PID 1064 wrote to memory of 1144	1064	cmd.exe	taskkill.exe
PID 1064 wrote to memory of 1144	1064	cmd.exe	taskkill.exe
PID 1064 wrote to memory of 1144	1064	cmd.exe	taskkill.exe
PID 1064 wrote to memory of 1144	1064	cmd.exe	taskkill.exe
PID 1064 wrote to memory of 1144	1064	cmd.exe	taskkill.exe
PID 1064 wrote to memory of 1144	1064	cmd.exe	taskkill.exe

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1356

C:\Users\Admin\AppData\Local\Temp\is-6RJV7.tmp\is-VMK1P.tmp
"C:\Users\Admin\AppData\Local\Temp\is-6RJV7.tmp\is-VMK1P.tmp" /SL4 $60126 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1184138 51712
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1256

C:\Program Files (x86)\PrintFolders\PrintFolders.exe
"C:\Program Files (x86)\PrintFolders\PrintFolders.exe"
3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1748

C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\lTpbbok4jEg.exe
4⤵
- Executes dropped EXE
- Loads dropped DLL
PID:1316

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c taskkill /im "PrintFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\PrintFolders.exe" & exit
4⤵
- Suspicious use of WriteProcessMemory
PID:1064

C:\Windows\SysWOW64\taskkill.exe
taskkill /im "PrintFolders.exe" /f
5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:1144

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Filesize
1.6MB

MD5
8d6638ed6948d3787eb0c2cdb5e179f0

SHA1
e4dffd06ee6f66a240b70dd821810f08f1b1571f

SHA256
b1f9eabaa337bfb606a339084978bb6a46c0d2beac78453f3761e1f745729449

SHA512
6cf3c6a7323522ba41a10b2731cedfd3cb8698b5d9d86a763143869747459576f66157b27db7b545d432ae8ab6ae67ac039309fa3a68a9bc9082aeda35e36b54

Download Submit
C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Filesize
1.6MB

MD5
8d6638ed6948d3787eb0c2cdb5e179f0

SHA1
e4dffd06ee6f66a240b70dd821810f08f1b1571f

SHA256
b1f9eabaa337bfb606a339084978bb6a46c0d2beac78453f3761e1f745729449

SHA512
6cf3c6a7323522ba41a10b2731cedfd3cb8698b5d9d86a763143869747459576f66157b27db7b545d432ae8ab6ae67ac039309fa3a68a9bc9082aeda35e36b54

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-6RJV7.tmp\is-VMK1P.tmp
Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-6RJV7.tmp\is-VMK1P.tmp
Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

Download Submit
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\lTpbbok4jEg.exe
Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\lTpbbok4jEg.exe
Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Program Files (x86)\PrintFolders\PrintFolders.exe
Filesize
1.6MB

MD5
8d6638ed6948d3787eb0c2cdb5e179f0

SHA1
e4dffd06ee6f66a240b70dd821810f08f1b1571f

SHA256
b1f9eabaa337bfb606a339084978bb6a46c0d2beac78453f3761e1f745729449

SHA512
6cf3c6a7323522ba41a10b2731cedfd3cb8698b5d9d86a763143869747459576f66157b27db7b545d432ae8ab6ae67ac039309fa3a68a9bc9082aeda35e36b54

Download Submit
\Program Files (x86)\PrintFolders\PrintFolders.exe
Filesize
1.6MB

MD5
8d6638ed6948d3787eb0c2cdb5e179f0

SHA1
e4dffd06ee6f66a240b70dd821810f08f1b1571f

SHA256
b1f9eabaa337bfb606a339084978bb6a46c0d2beac78453f3761e1f745729449

SHA512
6cf3c6a7323522ba41a10b2731cedfd3cb8698b5d9d86a763143869747459576f66157b27db7b545d432ae8ab6ae67ac039309fa3a68a9bc9082aeda35e36b54

Download Submit
\Program Files (x86)\PrintFolders\PrintFolders.exe
Filesize
1.6MB

MD5
8d6638ed6948d3787eb0c2cdb5e179f0

SHA1
e4dffd06ee6f66a240b70dd821810f08f1b1571f

SHA256
b1f9eabaa337bfb606a339084978bb6a46c0d2beac78453f3761e1f745729449

SHA512
6cf3c6a7323522ba41a10b2731cedfd3cb8698b5d9d86a763143869747459576f66157b27db7b545d432ae8ab6ae67ac039309fa3a68a9bc9082aeda35e36b54

Download Submit
\Users\Admin\AppData\Local\Temp\is-6RJV7.tmp\is-VMK1P.tmp
Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

Download Submit
\Users\Admin\AppData\Local\Temp\is-HV0I1.tmp\_iscrypt.dll
Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
\Users\Admin\AppData\Local\Temp\is-HV0I1.tmp\_isetup\_shfoldr.dll
Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-HV0I1.tmp\_isetup\_shfoldr.dll
Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\lTpbbok4jEg.exe
Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\lTpbbok4jEg.exe
Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\lTpbbok4jEg.exe
Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/1064-94-0x0000000000000000-mapping.dmp

Download
memory/1144-98-0x0000000000000000-mapping.dmp

Download
memory/1256-58-0x0000000000000000-mapping.dmp

Download
memory/1256-73-0x0000000003140000-0x00000000040D8000-memory.dmp

Filesize
15.6MB

Download
memory/1256-90-0x0000000003140000-0x00000000040D8000-memory.dmp

Filesize
15.6MB

Download
memory/1316-80-0x0000000000000000-mapping.dmp

Download
memory/1356-65-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/1356-54-0x0000000075BA1000-0x0000000075BA3000-memory.dmp

Filesize
8KB

Download
memory/1356-55-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/1356-97-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/1748-67-0x0000000000000000-mapping.dmp

Download
memory/1748-74-0x0000000000400000-0x0000000001398000-memory.dmp

Filesize
15.6MB

Download
memory/1748-86-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1748-78-0x0000000000400000-0x0000000001398000-memory.dmp

Filesize
15.6MB

Download
memory/1748-91-0x0000000000400000-0x0000000001398000-memory.dmp

Filesize
15.6MB

Download
memory/1748-92-0x0000000001990000-0x0000000002928000-memory.dmp

Filesize
15.6MB

Download
memory/1748-93-0x0000000000400000-0x0000000001398000-memory.dmp

Filesize
15.6MB

Download
memory/1748-75-0x0000000001990000-0x0000000002928000-memory.dmp

Filesize
15.6MB

Download
memory/1748-95-0x0000000000400000-0x0000000001398000-memory.dmp

Filesize
15.6MB

Download
memory/1748-76-0x0000000001990000-0x0000000002928000-memory.dmp

Filesize
15.6MB

Download
memory/1748-77-0x0000000000400000-0x0000000001398000-memory.dmp

Filesize
15.6MB

Download