nymaim | ab05f9056a0f893d4ced21fa916ae98686b86e58c68e16890dfb3b06875a4a4a

Analysis

max time kernel
155s
max time network
161s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
24/11/2022, 21:47

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General

Target
file.exe
Size 1.2MB
Sample221124-1m63wsbe64
SHA256 ab05f9056a0f893d4ced21fa916ae98686b86e58c68e16890dfb3b06875a4a4a
MD5 bd8cf6cb7df2b19ae1461a01affc9bee
SHA1 ec2c406742cf9df652fdfba751ba7c1bc6f1b790
SHA512 56259ed644950e3ffa38461b56c16ea0a555064715d804cda1a46616a6311af629bcbfbe10592e6b422f392208d419220a8380b0ba774ce598da7c3dde7d89b8
SSDEEP 24576:JizI/4X6tM8BA1Z418/3Pg3WGNauK+ysUeyVgZIY7eCLxYis:CI/ot8BA1G1cY3EuKSUeyyNeVis
MD5 SHA1 SHA512 SSDEEP

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

pid	Process
276	is-2LECL.tmp
472	PrintFolders.exe
1836	NUb4h8.exe

Loads dropped DLL 10 IoCs

pid	Process
1192	file.exe
276	is-2LECL.tmp
276	is-2LECL.tmp
276	is-2LECL.tmp
276	is-2LECL.tmp
472	PrintFolders.exe
472	PrintFolders.exe
472	PrintFolders.exe
1836	NUb4h8.exe
1836	NUb4h8.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

description	ioc	Process
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-2LECL.tmp
File created	C:\Program Files (x86)\PrintFolders\is-VJT9K.tmp	is-2LECL.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-2LECL.tmp
File created	C:\Program Files (x86)\PrintFolders\is-A1C77.tmp	is-2LECL.tmp
File created	C:\Program Files (x86)\PrintFolders\is-11TU3.tmp	is-2LECL.tmp
File created	C:\Program Files (x86)\PrintFolders\is-BAU0J.tmp	is-2LECL.tmp
File created	C:\Program Files (x86)\PrintFolders\is-EFBUC.tmp	is-2LECL.tmp
File created	C:\Program Files (x86)\PrintFolders\is-2GMH0.tmp	is-2LECL.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-2LECL.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

pid	Process
1772	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
472	PrintFolders.exe
472	PrintFolders.exe
472	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeRestorePrivilege	276	is-2LECL.tmp
Token: SeBackupPrivilege	276	is-2LECL.tmp
Token: SeDebugPrivilege	1772	taskkill.exe

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 1192 wrote to memory of 276	1192	file.exe	28
PID 1192 wrote to memory of 276	1192	file.exe	28
PID 1192 wrote to memory of 276	1192	file.exe	28
PID 1192 wrote to memory of 276	1192	file.exe	28
PID 1192 wrote to memory of 276	1192	file.exe	28
PID 1192 wrote to memory of 276	1192	file.exe	28
PID 1192 wrote to memory of 276	1192	file.exe	28
PID 276 wrote to memory of 472	276	is-2LECL.tmp	29
PID 276 wrote to memory of 472	276	is-2LECL.tmp	29
PID 276 wrote to memory of 472	276	is-2LECL.tmp	29
PID 276 wrote to memory of 472	276	is-2LECL.tmp	29
PID 276 wrote to memory of 472	276	is-2LECL.tmp	29
PID 276 wrote to memory of 472	276	is-2LECL.tmp	29
PID 276 wrote to memory of 472	276	is-2LECL.tmp	29
PID 472 wrote to memory of 1836	472	PrintFolders.exe	30
PID 472 wrote to memory of 1836	472	PrintFolders.exe	30
PID 472 wrote to memory of 1836	472	PrintFolders.exe	30
PID 472 wrote to memory of 1836	472	PrintFolders.exe	30
PID 472 wrote to memory of 1836	472	PrintFolders.exe	30
PID 472 wrote to memory of 1836	472	PrintFolders.exe	30
PID 472 wrote to memory of 1836	472	PrintFolders.exe	30
PID 472 wrote to memory of 980	472	PrintFolders.exe	33
PID 472 wrote to memory of 980	472	PrintFolders.exe	33
PID 472 wrote to memory of 980	472	PrintFolders.exe	33
PID 472 wrote to memory of 980	472	PrintFolders.exe	33
PID 472 wrote to memory of 980	472	PrintFolders.exe	33
PID 472 wrote to memory of 980	472	PrintFolders.exe	33
PID 472 wrote to memory of 980	472	PrintFolders.exe	33
PID 980 wrote to memory of 1772	980	cmd.exe	35
PID 980 wrote to memory of 1772	980	cmd.exe	35
PID 980 wrote to memory of 1772	980	cmd.exe	35
PID 980 wrote to memory of 1772	980	cmd.exe	35
PID 980 wrote to memory of 1772	980	cmd.exe	35
PID 980 wrote to memory of 1772	980	cmd.exe	35
PID 980 wrote to memory of 1772	980	cmd.exe	35

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:1192
- C:\Users\Admin\AppData\Local\Temp\is-RT5AU.tmp\is-2LECL.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-RT5AU.tmp\is-2LECL.tmp" /SL4 $70124 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1057674 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:276
- - 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:472
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\NUb4h8.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      PID:1836
  - - 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:980
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1772

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 1.7MB
SHA256 10449ee59db6aeacb333134f96ebca90c63b4a74a961cbb5c8d45d7db52b649c
MD5 5e0bf0ac4f010491b92d0c2d754a1445
SHA1 47fe648180c6f63d31332d12b463834b76392e47
SHA512 ab71fbfc81abe72c9f36150c0d9c14caea601c79d17c5e3439bdc2c8b3a3349a0ef8baf9a22e9c1128163736104503b0a64d6144acde064fc23c5ba538888178
SSDEEP 24576:S+a+4+6c+MOVO+cj+yqGLi+wn+6lffkc4IglPMUS9Gg8iWtS4aaROQM0K1J3aY79:7zR6FTVX3yqGHroMllTSb85kQVY7x3D
MD5 SHA1 SHA512 SSDEEP

Submit Download

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 1.7MB
SHA256 10449ee59db6aeacb333134f96ebca90c63b4a74a961cbb5c8d45d7db52b649c
MD5 5e0bf0ac4f010491b92d0c2d754a1445
SHA1 47fe648180c6f63d31332d12b463834b76392e47
SHA512 ab71fbfc81abe72c9f36150c0d9c14caea601c79d17c5e3439bdc2c8b3a3349a0ef8baf9a22e9c1128163736104503b0a64d6144acde064fc23c5ba538888178
SSDEEP 24576:S+a+4+6c+MOVO+cj+yqGLi+wn+6lffkc4IglPMUS9Gg8iWtS4aaROQM0K1J3aY79:7zR6FTVX3yqGHroMllTSb85kQVY7x3D
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-2LECL.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-RT5AU.tmp\is-2LECL.tmp
Size 643KB
SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
MD5 85b94e72c3f2d2b5464e2aaf3c9e242a
SHA1 ce7ccae5f50a990d059d59292d4a332979e162ba
SHA512 c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
SSDEEP 12288:Oh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvJxO0:05NoqWolrP837JzHvA6yknyWFxvJxO0
MD5 SHA1 SHA512 SSDEEP

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is-2LECL.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-RT5AU.tmp\is-2LECL.tmp
Size 643KB
SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
MD5 85b94e72c3f2d2b5464e2aaf3c9e242a
SHA1 ce7ccae5f50a990d059d59292d4a332979e162ba
SHA512 c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
SSDEEP 12288:Oh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvJxO0:05NoqWolrP837JzHvA6yknyWFxvJxO0
MD5 SHA1 SHA512 SSDEEP

Submit Download

NUb4h8.exe

Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\NUb4h8.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

NUb4h8.exe

Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\NUb4h8.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

PrintFolders.exe

Path \Program Files (x86)\PrintFolders\PrintFolders.exe
Size 1.7MB
SHA256 10449ee59db6aeacb333134f96ebca90c63b4a74a961cbb5c8d45d7db52b649c
MD5 5e0bf0ac4f010491b92d0c2d754a1445
SHA1 47fe648180c6f63d31332d12b463834b76392e47
SHA512 ab71fbfc81abe72c9f36150c0d9c14caea601c79d17c5e3439bdc2c8b3a3349a0ef8baf9a22e9c1128163736104503b0a64d6144acde064fc23c5ba538888178
SSDEEP 24576:S+a+4+6c+MOVO+cj+yqGLi+wn+6lffkc4IglPMUS9Gg8iWtS4aaROQM0K1J3aY79:7zR6FTVX3yqGHroMllTSb85kQVY7x3D
MD5 SHA1 SHA512 SSDEEP

Submit Download

PrintFolders.exe

Path \Program Files (x86)\PrintFolders\PrintFolders.exe
Size 1.7MB
SHA256 10449ee59db6aeacb333134f96ebca90c63b4a74a961cbb5c8d45d7db52b649c
MD5 5e0bf0ac4f010491b92d0c2d754a1445
SHA1 47fe648180c6f63d31332d12b463834b76392e47
SHA512 ab71fbfc81abe72c9f36150c0d9c14caea601c79d17c5e3439bdc2c8b3a3349a0ef8baf9a22e9c1128163736104503b0a64d6144acde064fc23c5ba538888178
SSDEEP 24576:S+a+4+6c+MOVO+cj+yqGLi+wn+6lffkc4IglPMUS9Gg8iWtS4aaROQM0K1J3aY79:7zR6FTVX3yqGHroMllTSb85kQVY7x3D
MD5 SHA1 SHA512 SSDEEP

Submit Download

PrintFolders.exe

Path \Program Files (x86)\PrintFolders\PrintFolders.exe
Size 1.7MB
SHA256 10449ee59db6aeacb333134f96ebca90c63b4a74a961cbb5c8d45d7db52b649c
MD5 5e0bf0ac4f010491b92d0c2d754a1445
SHA1 47fe648180c6f63d31332d12b463834b76392e47
SHA512 ab71fbfc81abe72c9f36150c0d9c14caea601c79d17c5e3439bdc2c8b3a3349a0ef8baf9a22e9c1128163736104503b0a64d6144acde064fc23c5ba538888178
SSDEEP 24576:S+a+4+6c+MOVO+cj+yqGLi+wn+6lffkc4IglPMUS9Gg8iWtS4aaROQM0K1J3aY79:7zR6FTVX3yqGHroMllTSb85kQVY7x3D
MD5 SHA1 SHA512 SSDEEP

Submit Download

_iscrypt.dll

Path \Users\Admin\AppData\Local\Temp\is-9PCG3.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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_shfoldr.dll

Path \Users\Admin\AppData\Local\Temp\is-9PCG3.tmp\_isetup\_shfoldr.dll
Size 22KB
SHA256 9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87
MD5 92dc6ef532fbb4a5c3201469a5b5eb63
SHA1 3e89ff837147c16b4e41c30d6c796374e0b8e62c
SHA512 9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3
SSDEEP 384:+Vm08QoKkiWZ76UJuP71W55iWHHoSHigH2euwsHTGHVb+VHHmnH+aHjHqLHxmoq1:2m08QotiCjJuPGw4
MD5 SHA1 SHA512 SSDEEP

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_shfoldr.dll

Path \Users\Admin\AppData\Local\Temp\is-9PCG3.tmp\_isetup\_shfoldr.dll
Size 22KB
SHA256 9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87
MD5 92dc6ef532fbb4a5c3201469a5b5eb63
SHA1 3e89ff837147c16b4e41c30d6c796374e0b8e62c
SHA512 9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3
SSDEEP 384:+Vm08QoKkiWZ76UJuP71W55iWHHoSHigH2euwsHTGHVb+VHHmnH+aHjHqLHxmoq1:2m08QotiCjJuPGw4
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-2LECL.tmp

Path \Users\Admin\AppData\Local\Temp\is-RT5AU.tmp\is-2LECL.tmp
Size 643KB
SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
MD5 85b94e72c3f2d2b5464e2aaf3c9e242a
SHA1 ce7ccae5f50a990d059d59292d4a332979e162ba
SHA512 c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
SSDEEP 12288:Oh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvJxO0:05NoqWolrP837JzHvA6yknyWFxvJxO0
MD5 SHA1 SHA512 SSDEEP

Submit Download

NUb4h8.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\NUb4h8.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

NUb4h8.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\NUb4h8.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

NUb4h8.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\NUb4h8.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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memory/276-73-0x00000000030B0000-0x0000000004064000-memory.dmp

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memory/276-78-0x00000000030B0000-0x0000000004064000-memory.dmp

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memory/472-88-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/472-76-0x0000000000400000-0x00000000013B4000-memory.dmp

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memory/472-79-0x0000000000400000-0x00000000013B4000-memory.dmp

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memory/472-77-0x0000000000400000-0x00000000013B4000-memory.dmp

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memory/472-95-0x0000000000400000-0x00000000013B4000-memory.dmp

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memory/472-74-0x0000000000400000-0x00000000013B4000-memory.dmp

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memory/472-83-0x0000000000400000-0x00000000013B4000-memory.dmp

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memory/472-75-0x0000000001A10000-0x00000000029C4000-memory.dmp

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memory/1192-54-0x0000000074D71000-0x0000000074D73000-memory.dmp

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memory/1192-55-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/1192-57-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/1192-97-0x0000000000400000-0x0000000000413000-memory.dmp

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