nymaim | 04dbd463c557af8dd3c6354882561a5b65add1049b7fd80d2af01039c07e8da3

Analysis

max time kernel
61s
max time network
67s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
23-11-2022 12:17

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General

Target

file.exe
Size

1.3MB
MD5

40a441dbadc44139a05155ba53b1a150
SHA1

ed621159ed478e6d9186164f4637315a110273cb
SHA256

04dbd463c557af8dd3c6354882561a5b65add1049b7fd80d2af01039c07e8da3
SHA512

8b4664715fa5deb48970b6b973991a2656be8a320d60a6d6a0fef4a54874e220a3f3a52af98c507693e48ca00e05b7f85deb964e7cc4938a8bf450dc7c9a1ab1
SSDEEP

24576:9izS+osa1CiPYheFMyL4h3umkG4i7oAMLKxFYM2utj1g1iwpZjNuf5OJYgZIY7ee:W1osaoiP80dQePG4i7dMLK/YM2ojyik9

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-UJFD3.tmpPrintFolders.exeF2iBf4Dr1.exe

pid process

1116 is-UJFD3.tmp
1412 PrintFolders.exe
472 F2iBf4Dr1.exe

pid	process
1116	is-UJFD3.tmp
1412	PrintFolders.exe
472	F2iBf4Dr1.exe

Loads dropped DLL 10 IoCs

Processes:

file.exeis-UJFD3.tmpPrintFolders.exeF2iBf4Dr1.exe

pid	process
1464	file.exe
1116	is-UJFD3.tmp
1116	is-UJFD3.tmp
1116	is-UJFD3.tmp
1116	is-UJFD3.tmp
1412	PrintFolders.exe
1412	PrintFolders.exe
1412	PrintFolders.exe
472	F2iBf4Dr1.exe
472	F2iBf4Dr1.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-UJFD3.tmp

description	ioc	process
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-UJFD3.tmp
File created	C:\Program Files (x86)\PrintFolders\is-JG884.tmp	is-UJFD3.tmp
File created	C:\Program Files (x86)\PrintFolders\is-HRKLM.tmp	is-UJFD3.tmp
File created	C:\Program Files (x86)\PrintFolders\is-UTK3R.tmp	is-UJFD3.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-UJFD3.tmp
File created	C:\Program Files (x86)\PrintFolders\is-1E7S0.tmp	is-UJFD3.tmp
File created	C:\Program Files (x86)\PrintFolders\is-2I65D.tmp	is-UJFD3.tmp
File created	C:\Program Files (x86)\PrintFolders\is-3RT09.tmp	is-UJFD3.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-UJFD3.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

1556 taskkill.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

PrintFolders.exe

pid process

1412 PrintFolders.exe
1412 PrintFolders.exe
1412 PrintFolders.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

is-UJFD3.tmptaskkill.exe

description pid process

Token: SeRestorePrivilege 1116 is-UJFD3.tmp
Token: SeBackupPrivilege 1116 is-UJFD3.tmp
Token: SeDebugPrivilege 1556 taskkill.exe

pid	process
1556	taskkill.exe

pid	process
1412	PrintFolders.exe
1412	PrintFolders.exe
1412	PrintFolders.exe

description	pid	process
Token: SeRestorePrivilege	1116	is-UJFD3.tmp
Token: SeBackupPrivilege	1116	is-UJFD3.tmp
Token: SeDebugPrivilege	1556	taskkill.exe

Suspicious use of WriteProcessMemory 35 IoCs

Processes:

file.exeis-UJFD3.tmpPrintFolders.execmd.exe

description	pid	process	target process
PID 1464 wrote to memory of 1116	1464	file.exe	is-UJFD3.tmp
PID 1464 wrote to memory of 1116	1464	file.exe	is-UJFD3.tmp
PID 1464 wrote to memory of 1116	1464	file.exe	is-UJFD3.tmp
PID 1464 wrote to memory of 1116	1464	file.exe	is-UJFD3.tmp
PID 1464 wrote to memory of 1116	1464	file.exe	is-UJFD3.tmp
PID 1464 wrote to memory of 1116	1464	file.exe	is-UJFD3.tmp
PID 1464 wrote to memory of 1116	1464	file.exe	is-UJFD3.tmp
PID 1116 wrote to memory of 1412	1116	is-UJFD3.tmp	PrintFolders.exe
PID 1116 wrote to memory of 1412	1116	is-UJFD3.tmp	PrintFolders.exe
PID 1116 wrote to memory of 1412	1116	is-UJFD3.tmp	PrintFolders.exe
PID 1116 wrote to memory of 1412	1116	is-UJFD3.tmp	PrintFolders.exe
PID 1116 wrote to memory of 1412	1116	is-UJFD3.tmp	PrintFolders.exe
PID 1116 wrote to memory of 1412	1116	is-UJFD3.tmp	PrintFolders.exe
PID 1116 wrote to memory of 1412	1116	is-UJFD3.tmp	PrintFolders.exe
PID 1412 wrote to memory of 472	1412	PrintFolders.exe	F2iBf4Dr1.exe
PID 1412 wrote to memory of 472	1412	PrintFolders.exe	F2iBf4Dr1.exe
PID 1412 wrote to memory of 472	1412	PrintFolders.exe	F2iBf4Dr1.exe
PID 1412 wrote to memory of 472	1412	PrintFolders.exe	F2iBf4Dr1.exe
PID 1412 wrote to memory of 472	1412	PrintFolders.exe	F2iBf4Dr1.exe
PID 1412 wrote to memory of 472	1412	PrintFolders.exe	F2iBf4Dr1.exe
PID 1412 wrote to memory of 472	1412	PrintFolders.exe	F2iBf4Dr1.exe
PID 1412 wrote to memory of 2032	1412	PrintFolders.exe	cmd.exe
PID 1412 wrote to memory of 2032	1412	PrintFolders.exe	cmd.exe
PID 1412 wrote to memory of 2032	1412	PrintFolders.exe	cmd.exe
PID 1412 wrote to memory of 2032	1412	PrintFolders.exe	cmd.exe
PID 1412 wrote to memory of 2032	1412	PrintFolders.exe	cmd.exe
PID 1412 wrote to memory of 2032	1412	PrintFolders.exe	cmd.exe
PID 1412 wrote to memory of 2032	1412	PrintFolders.exe	cmd.exe
PID 2032 wrote to memory of 1556	2032	cmd.exe	taskkill.exe
PID 2032 wrote to memory of 1556	2032	cmd.exe	taskkill.exe
PID 2032 wrote to memory of 1556	2032	cmd.exe	taskkill.exe
PID 2032 wrote to memory of 1556	2032	cmd.exe	taskkill.exe
PID 2032 wrote to memory of 1556	2032	cmd.exe	taskkill.exe
PID 2032 wrote to memory of 1556	2032	cmd.exe	taskkill.exe
PID 2032 wrote to memory of 1556	2032	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:1464

C:\Users\Admin\AppData\Local\Temp\is-B014K.tmp\is-UJFD3.tmp
"C:\Users\Admin\AppData\Local\Temp\is-B014K.tmp\is-UJFD3.tmp" /SL4 $70124 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1083983 51712
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1116

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:1412

C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\F2iBf4Dr1.exe
4⤵
- Executes dropped EXE
- Loads dropped DLL
PID:472

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:2032

C:\Windows\SysWOW64\taskkill.exe
taskkill /im "PrintFolders.exe" /f
5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:1556

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
cbde69b5f03136330395821a0e03b208

SHA1
ea8cf8c45da90019f5fa28dfa7113f5969f9f6a7

SHA256
388d0674247dd9ec292d7d5818216adf0c119229023e36e4f4394f37c5ee7460

SHA512
59d181c663c8815c2bc54f01d8acf57c9ef1747a8d35f85ac6e73559b3f60f0f51c079ab236141526939ffd67f225b02bbce22390837bbf8d64f51d9ae0f38b5

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

MD5
cbde69b5f03136330395821a0e03b208

SHA1
ea8cf8c45da90019f5fa28dfa7113f5969f9f6a7

SHA256
388d0674247dd9ec292d7d5818216adf0c119229023e36e4f4394f37c5ee7460

SHA512
59d181c663c8815c2bc54f01d8acf57c9ef1747a8d35f85ac6e73559b3f60f0f51c079ab236141526939ffd67f225b02bbce22390837bbf8d64f51d9ae0f38b5

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-B014K.tmp\is-UJFD3.tmp
Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-B014K.tmp\is-UJFD3.tmp
Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

Download Submit
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\F2iBf4Dr1.exe
Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\F2iBf4Dr1.exe
Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

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

MD5
cbde69b5f03136330395821a0e03b208

SHA1
ea8cf8c45da90019f5fa28dfa7113f5969f9f6a7

SHA256
388d0674247dd9ec292d7d5818216adf0c119229023e36e4f4394f37c5ee7460

SHA512
59d181c663c8815c2bc54f01d8acf57c9ef1747a8d35f85ac6e73559b3f60f0f51c079ab236141526939ffd67f225b02bbce22390837bbf8d64f51d9ae0f38b5

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

MD5
cbde69b5f03136330395821a0e03b208

SHA1
ea8cf8c45da90019f5fa28dfa7113f5969f9f6a7

SHA256
388d0674247dd9ec292d7d5818216adf0c119229023e36e4f4394f37c5ee7460

SHA512
59d181c663c8815c2bc54f01d8acf57c9ef1747a8d35f85ac6e73559b3f60f0f51c079ab236141526939ffd67f225b02bbce22390837bbf8d64f51d9ae0f38b5

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

MD5
cbde69b5f03136330395821a0e03b208

SHA1
ea8cf8c45da90019f5fa28dfa7113f5969f9f6a7

SHA256
388d0674247dd9ec292d7d5818216adf0c119229023e36e4f4394f37c5ee7460

SHA512
59d181c663c8815c2bc54f01d8acf57c9ef1747a8d35f85ac6e73559b3f60f0f51c079ab236141526939ffd67f225b02bbce22390837bbf8d64f51d9ae0f38b5

Download Submit
\Users\Admin\AppData\Local\Temp\is-9MVKC.tmp\_iscrypt.dll
Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
\Users\Admin\AppData\Local\Temp\is-9MVKC.tmp\_isetup\_shfoldr.dll
Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-9MVKC.tmp\_isetup\_shfoldr.dll
Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-B014K.tmp\is-UJFD3.tmp
Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\F2iBf4Dr1.exe
Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\F2iBf4Dr1.exe
Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\F2iBf4Dr1.exe
Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/472-80-0x0000000000000000-mapping.dmp

Download
memory/1116-58-0x0000000000000000-mapping.dmp

Download
memory/1116-73-0x0000000002F30000-0x0000000003EA3000-memory.dmp

Filesize
15.4MB

Download
memory/1116-90-0x0000000002F30000-0x0000000003EA3000-memory.dmp

Filesize
15.4MB

Download
memory/1412-75-0x00000000019E0000-0x0000000002953000-memory.dmp

Filesize
15.4MB

Download
memory/1412-92-0x00000000019E0000-0x0000000002953000-memory.dmp

Filesize
15.4MB

Download
memory/1412-77-0x0000000000400000-0x0000000001373000-memory.dmp

Filesize
15.4MB

Download
memory/1412-76-0x00000000019E0000-0x0000000002953000-memory.dmp

Filesize
15.4MB

Download
memory/1412-97-0x0000000000400000-0x0000000001373000-memory.dmp

Filesize
15.4MB

Download
memory/1412-74-0x0000000000400000-0x0000000001373000-memory.dmp

Filesize
15.4MB

Download
memory/1412-67-0x0000000000000000-mapping.dmp

Download
memory/1412-93-0x0000000000400000-0x0000000001373000-memory.dmp

Filesize
15.4MB

Download
memory/1412-86-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1412-78-0x0000000000400000-0x0000000001373000-memory.dmp

Filesize
15.4MB

Download
memory/1412-91-0x0000000000400000-0x0000000001373000-memory.dmp

Filesize
15.4MB

Download
memory/1464-55-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/1464-65-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/1464-54-0x00000000758B1000-0x00000000758B3000-memory.dmp

Filesize
8KB

Download
memory/1464-98-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/1556-96-0x0000000000000000-mapping.dmp

Download
memory/2032-94-0x0000000000000000-mapping.dmp

Download