nymaim | 917217e609a23bea6a5f3046453e4678e7d6b07311c75cfda71964315a9a8c59

Analysis

max time kernel
58s
max time network
63s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
23-11-2022 10:47

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General

Target

file.exe
Size

1.2MB
MD5

39bc1703e192b987fc386248a1b5b39b
SHA1

d814fc4e78dfba117818859528aaaf6f51b47b80
SHA256

917217e609a23bea6a5f3046453e4678e7d6b07311c75cfda71964315a9a8c59
SHA512

1bbcca0edf0b2ba9fb6c5d14ff3888efea78981a59511751ba90fab3e8f796e2c3a8e83200eae2801b615afac63985797150a53659338d8c8ae378be53e275d6
SSDEEP

24576:tizR7uK8LTFMvGc4bJy0rZM7k0bT21azJP9SXNjNW9jLp3xgZIY7eCLxYiU:GCm4tnrZ/0bT24VkNW9xONeViU

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-VN1US.tmpPrintFolders.exe4Ciib.exe

pid process

1640 is-VN1US.tmp
588 PrintFolders.exe
1312 4Ciib.exe

pid	process
1640	is-VN1US.tmp
588	PrintFolders.exe
1312	4Ciib.exe

Loads dropped DLL 10 IoCs

Processes:

file.exeis-VN1US.tmpPrintFolders.exe4Ciib.exe

pid	process
996	file.exe
1640	is-VN1US.tmp
1640	is-VN1US.tmp
1640	is-VN1US.tmp
1640	is-VN1US.tmp
588	PrintFolders.exe
588	PrintFolders.exe
588	PrintFolders.exe
1312	4Ciib.exe
1312	4Ciib.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-VN1US.tmp

description	ioc	process
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-VN1US.tmp
File created	C:\Program Files (x86)\PrintFolders\is-GC6E8.tmp	is-VN1US.tmp
File created	C:\Program Files (x86)\PrintFolders\is-E2O84.tmp	is-VN1US.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-VN1US.tmp
File created	C:\Program Files (x86)\PrintFolders\is-4K05R.tmp	is-VN1US.tmp
File created	C:\Program Files (x86)\PrintFolders\is-2HLN7.tmp	is-VN1US.tmp
File created	C:\Program Files (x86)\PrintFolders\is-LMOU7.tmp	is-VN1US.tmp
File created	C:\Program Files (x86)\PrintFolders\is-KS6IG.tmp	is-VN1US.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-VN1US.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

2020 taskkill.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

PrintFolders.exe

pid process

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

Processes:

taskkill.exeis-VN1US.tmp

description pid process

Token: SeDebugPrivilege 2020 taskkill.exe
Token: SeRestorePrivilege 1640 is-VN1US.tmp
Token: SeBackupPrivilege 1640 is-VN1US.tmp

pid	process
2020	taskkill.exe

pid	process
588	PrintFolders.exe
588	PrintFolders.exe
588	PrintFolders.exe

description	pid	process
Token: SeDebugPrivilege	2020	taskkill.exe
Token: SeRestorePrivilege	1640	is-VN1US.tmp
Token: SeBackupPrivilege	1640	is-VN1US.tmp

Suspicious use of WriteProcessMemory 35 IoCs

Processes:

file.exeis-VN1US.tmpPrintFolders.execmd.exe

description	pid	process	target process
PID 996 wrote to memory of 1640	996	file.exe	is-VN1US.tmp
PID 996 wrote to memory of 1640	996	file.exe	is-VN1US.tmp
PID 996 wrote to memory of 1640	996	file.exe	is-VN1US.tmp
PID 996 wrote to memory of 1640	996	file.exe	is-VN1US.tmp
PID 996 wrote to memory of 1640	996	file.exe	is-VN1US.tmp
PID 996 wrote to memory of 1640	996	file.exe	is-VN1US.tmp
PID 996 wrote to memory of 1640	996	file.exe	is-VN1US.tmp
PID 1640 wrote to memory of 588	1640	is-VN1US.tmp	PrintFolders.exe
PID 1640 wrote to memory of 588	1640	is-VN1US.tmp	PrintFolders.exe
PID 1640 wrote to memory of 588	1640	is-VN1US.tmp	PrintFolders.exe
PID 1640 wrote to memory of 588	1640	is-VN1US.tmp	PrintFolders.exe
PID 1640 wrote to memory of 588	1640	is-VN1US.tmp	PrintFolders.exe
PID 1640 wrote to memory of 588	1640	is-VN1US.tmp	PrintFolders.exe
PID 1640 wrote to memory of 588	1640	is-VN1US.tmp	PrintFolders.exe
PID 588 wrote to memory of 1312	588	PrintFolders.exe	4Ciib.exe
PID 588 wrote to memory of 1312	588	PrintFolders.exe	4Ciib.exe
PID 588 wrote to memory of 1312	588	PrintFolders.exe	4Ciib.exe
PID 588 wrote to memory of 1312	588	PrintFolders.exe	4Ciib.exe
PID 588 wrote to memory of 1312	588	PrintFolders.exe	4Ciib.exe
PID 588 wrote to memory of 1312	588	PrintFolders.exe	4Ciib.exe
PID 588 wrote to memory of 1312	588	PrintFolders.exe	4Ciib.exe
PID 588 wrote to memory of 1904	588	PrintFolders.exe	cmd.exe
PID 588 wrote to memory of 1904	588	PrintFolders.exe	cmd.exe
PID 588 wrote to memory of 1904	588	PrintFolders.exe	cmd.exe
PID 588 wrote to memory of 1904	588	PrintFolders.exe	cmd.exe
PID 588 wrote to memory of 1904	588	PrintFolders.exe	cmd.exe
PID 588 wrote to memory of 1904	588	PrintFolders.exe	cmd.exe
PID 588 wrote to memory of 1904	588	PrintFolders.exe	cmd.exe
PID 1904 wrote to memory of 2020	1904	cmd.exe	taskkill.exe
PID 1904 wrote to memory of 2020	1904	cmd.exe	taskkill.exe
PID 1904 wrote to memory of 2020	1904	cmd.exe	taskkill.exe
PID 1904 wrote to memory of 2020	1904	cmd.exe	taskkill.exe
PID 1904 wrote to memory of 2020	1904	cmd.exe	taskkill.exe
PID 1904 wrote to memory of 2020	1904	cmd.exe	taskkill.exe
PID 1904 wrote to memory of 2020	1904	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:996

C:\Users\Admin\AppData\Local\Temp\is-SMKLB.tmp\is-VN1US.tmp
"C:\Users\Admin\AppData\Local\Temp\is-SMKLB.tmp\is-VN1US.tmp" /SL4 $70120 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1047415 51712
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1640

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:588

C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\4Ciib.exe
4⤵
- Executes dropped EXE
- Loads dropped DLL
PID:1312

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:1904

C:\Windows\SysWOW64\taskkill.exe
taskkill /im "PrintFolders.exe" /f
5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:2020

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
1.4MB

MD5
51cd9988601b8f5caff98fbb9f235d6f

SHA1
0ae706b9ed8e19132b546573daf295cc51542bd4

SHA256
3f21f1d63ea62cb47344732381a078a13168d3d4379de70bb62e8b30c8a62cf9

SHA512
da2e518bec2cae35d6a63cef9c808441661b4ff458913792e4bb36b5f3e8e8d12dcdc9ed1b7060a78d9edd6fcefe0912c958f43745a1e9a04a5b18f46ac03f23

Download Submit
C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Filesize
1.4MB

MD5
51cd9988601b8f5caff98fbb9f235d6f

SHA1
0ae706b9ed8e19132b546573daf295cc51542bd4

SHA256
3f21f1d63ea62cb47344732381a078a13168d3d4379de70bb62e8b30c8a62cf9

SHA512
da2e518bec2cae35d6a63cef9c808441661b4ff458913792e4bb36b5f3e8e8d12dcdc9ed1b7060a78d9edd6fcefe0912c958f43745a1e9a04a5b18f46ac03f23

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-SMKLB.tmp\is-VN1US.tmp
Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-SMKLB.tmp\is-VN1US.tmp
Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

Download Submit
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\4Ciib.exe
Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\4Ciib.exe
Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Program Files (x86)\PrintFolders\PrintFolders.exe
Filesize
1.4MB

MD5
51cd9988601b8f5caff98fbb9f235d6f

SHA1
0ae706b9ed8e19132b546573daf295cc51542bd4

SHA256
3f21f1d63ea62cb47344732381a078a13168d3d4379de70bb62e8b30c8a62cf9

SHA512
da2e518bec2cae35d6a63cef9c808441661b4ff458913792e4bb36b5f3e8e8d12dcdc9ed1b7060a78d9edd6fcefe0912c958f43745a1e9a04a5b18f46ac03f23

Download Submit
\Program Files (x86)\PrintFolders\PrintFolders.exe
Filesize
1.4MB

MD5
51cd9988601b8f5caff98fbb9f235d6f

SHA1
0ae706b9ed8e19132b546573daf295cc51542bd4

SHA256
3f21f1d63ea62cb47344732381a078a13168d3d4379de70bb62e8b30c8a62cf9

SHA512
da2e518bec2cae35d6a63cef9c808441661b4ff458913792e4bb36b5f3e8e8d12dcdc9ed1b7060a78d9edd6fcefe0912c958f43745a1e9a04a5b18f46ac03f23

Download Submit
\Program Files (x86)\PrintFolders\PrintFolders.exe
Filesize
1.4MB

MD5
51cd9988601b8f5caff98fbb9f235d6f

SHA1
0ae706b9ed8e19132b546573daf295cc51542bd4

SHA256
3f21f1d63ea62cb47344732381a078a13168d3d4379de70bb62e8b30c8a62cf9

SHA512
da2e518bec2cae35d6a63cef9c808441661b4ff458913792e4bb36b5f3e8e8d12dcdc9ed1b7060a78d9edd6fcefe0912c958f43745a1e9a04a5b18f46ac03f23

Download Submit
\Users\Admin\AppData\Local\Temp\is-01FM7.tmp\_iscrypt.dll
Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
\Users\Admin\AppData\Local\Temp\is-01FM7.tmp\_isetup\_shfoldr.dll
Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-01FM7.tmp\_isetup\_shfoldr.dll
Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-SMKLB.tmp\is-VN1US.tmp
Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\4Ciib.exe
Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\4Ciib.exe
Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\4Ciib.exe
Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/588-75-0x0000000001A90000-0x0000000002A03000-memory.dmp

Filesize
15.4MB

Download
memory/588-74-0x0000000000400000-0x0000000001373000-memory.dmp

Filesize
15.4MB

Download
memory/588-98-0x0000000000400000-0x0000000001373000-memory.dmp

Filesize
15.4MB

Download
memory/588-76-0x0000000001A90000-0x0000000002A03000-memory.dmp

Filesize
15.4MB

Download
memory/588-77-0x0000000000400000-0x0000000001373000-memory.dmp

Filesize
15.4MB

Download
memory/588-78-0x0000000000400000-0x0000000001373000-memory.dmp

Filesize
15.4MB

Download
memory/588-93-0x0000000000400000-0x0000000001373000-memory.dmp

Filesize
15.4MB

Download
memory/588-92-0x0000000001A90000-0x0000000002A03000-memory.dmp

Filesize
15.4MB

Download
memory/588-67-0x0000000000000000-mapping.dmp

Download
memory/588-91-0x0000000000400000-0x0000000001373000-memory.dmp

Filesize
15.4MB

Download
memory/588-86-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/996-55-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/996-65-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/996-54-0x00000000760E1000-0x00000000760E3000-memory.dmp

Filesize
8KB

Download
memory/996-99-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/1312-80-0x0000000000000000-mapping.dmp

Download
memory/1640-58-0x0000000000000000-mapping.dmp

Download
memory/1640-90-0x00000000030C0000-0x0000000004033000-memory.dmp

Filesize
15.4MB

Download
memory/1640-73-0x00000000030C0000-0x0000000004033000-memory.dmp

Filesize
15.4MB

Download
memory/1904-94-0x0000000000000000-mapping.dmp

Download
memory/2020-96-0x0000000000000000-mapping.dmp

Download